Norway: SIP providers and connecting a number to the PBX

This page continues the general guide on connecting a provider's number to the PBX: that page covers what is the same for any operator — the two trunk modes, what to ask the provider, what to enter in the form, network requirements and the connectivity check. Here are the Norwegian specifics: who in the country sells a number with a SIP trunk, what that operator issues and what of it to enter in Telephony → "Trunks and connections" → "Add provider".

The data was collected on 9 September 2026 from operator documentation, PBX vendor interoperability notes and materials of the regulator Nkom (Nasjonal kommunikasjonsmyndighet); links are in the "Sources" section.

In short#

• You can buy a number with a SIP trunk in Norway, and a venue needs no licence. No authorisation is required at all: the operator you take the number and the channel from simply registers with Nkom, and it is that operator — not the regulator — who assigns numbers to end users.
• Exactly one operator publishes its trunk parameters — Telenor. Its access point addresses, ports and authorisation scheme are public; at Telia, ice, GlobalConnect and Phonero all of it is "in the contract". That is not a refusal but a feature of this market: you will get the parameters, only after ordering.
• The most predictable choice technically is Telenor IPT Flerbruker in IP authorisation mode: the host, the ports and the G.711 codec are known in advance and fit our PBX. Its caveat is organisational — see the card.
• The cheapest way in is ice: 4 voice channels for NOK 240/month and a geographic number for NOK 3.20/month, exactly the scale of a café or a salon. The parameters are issued at connection time.
• ⚠️ The main local pitfall is that a Norwegian number may not be used permanently outside Norway without Nkom's permission. On top of that, since 2022 operators "park" incoming international calls that show a Norwegian caller ID. The conclusion is simple: take the number from a Norwegian operator, not from a foreign aggregator "for outbound".
• ⚠️ The second pitfall is number length. All Norwegian numbers have eight digits, while a line here is matched by the last seven: the landline 21 23 45 67 and the mobile 91 23 45 67 produce the same tail and merge into a single line.
• The contract is Scandinavian-strict. A company needs its name, legal form, organisasjonsnummer, address and the names of its managing director and board members; a private person needs a passport, a national ID card or a Norwegian driving licence, or an electronic ID of a high assurance level.

Numbers in the country#

• The country code is +47, the international prefix is 00. There is no national prefix (no leading zero).
• The plan is closed: a number is always 8 digits and is dialled in full, there are no area codes. The mandatory geographic tie was removed on 1 January 2020; the first two digits still hint at the historic region (21/22/23 — Oslo, 55/56 — Bergen, 51 — Rogaland, 73 — Trondheim, 75 — Nordland, 78 — Finnmark), but that is now operator habit rather than a rule.
• Ranges: fixed — 20 00 00 00–39 99 99 99, 50 00 00 00–57 99 99 99, 60 00 00 00–79 99 99 99; mobile — 40 00 00 00–49 99 99 99 and 90 00 00 00–99 99 99 99; special ranges 800…–899… (800 — free for the caller, 810 — shared cost, 815 — normal rate, 820/822/829 — premium services). There are also five-digit numbers 02000–09999, assigned directly to end users.
• Dialling: inside the country, eight digits with no prefix; abroad, 00 plus the country code. The emergency numbers are 110 (fire), 112 (police) and 113 (ambulance).
• Codecs. The country's "native" codec is G.711 A-law: Telenor lists it as mandatory and G.711 u-law as recommended. Our set of G.711 A-law / u-law / G.722 passes without transcoding.

On the Lines tab the number can be entered in any format: the PBX matches the last seven digits, so it makes no difference whether the number arrives as +4721234567 or as 21234567.

Who issues a number with a SIP trunk#

The first two rows are providers whose parameters are known in advance; their cards below carry a "What to enter in the admin panel" table. Next come ice, Telia and operators that issue parameters under contract; who will not work is at the end.

Telenor Norge — IPT Flerbruker#

The former state operator and the largest network in the country. IPT Flerbruker is its standard trunk "for a company with its own IP PBX": there can be several number ranges, and channels range from a dozen to several thousand. The service runs on top of a Mobilt Bedriftsnett contract; there are three access variants, and the one for us is IPT Internett — telephony over any internet line, with a mandatory fixed IP address (a dedicated PBX has one — the "Server" tab, the "Static IP" field).

Lead times: a new IPT Internett delivery takes up to 15 working days, porting numbers from another operator adds 5 more; each delivery comes with a test range of 10 numbers and 10 working days for acceptance.

What to enter in the admin panel

What to set up at the provider: order IPT Flerbruker in the IPT Internett variant → send the static IP of your PBX to ipt-prosjekt@telenor.no and ask them to open incoming traffic from all three access points → open SIP UDP/TCP 5060 and media UDP 10000–10999 in both directions on the firewall → route the numbers to the trunk → register the numbers' addresses in the operator's emergency address system (the customer maintains it, and it decides which address 110/112/113 will see).

Pitfalls ⚠️ Telenor has three equal access points — Arthur (148.122.97.152), Trillian (148.122.97.120) and Marvin (148.122.97.184) — and an incoming call may arrive from any of them; outbound calls are expected on the same three, distributed round-robin. A trunk recognises incoming calls by its SIP host, so put the name in the "SIP host" field rather than a single address: the name covers all three access points at once. Second: the operator requires the connected PBX to be "tested and approved", and its published list of approved equipment (3CX, Cisco, Avaya, Mitel, NEC, Innovaphone, Patton, AudioCodes and others) does not include Asterisk — a formality, but put the question to your account manager in writing before signing. Third: the network enforces anti-fraud limits — no more than 3 simultaneous calls with the same caller ID to "risky" countries and no more than 2 simultaneous forwarded calls to one country; the limits are lifted on request. The codecs G.711 A-law (mandatory) and G.711 u-law and RFC 2833 tone dialling come from an AudioCodes interoperability note; the market is not named there, so confirm the codec set in your contract. Sources: Oppgradert IPT Flerbruker, Tjenestebilag IPT — 09.09.2026.

Telavox#

A Swedish operator that also works in Norway: it sells a cloud PBX, mobile service and an "own hardware" mode — a SIP account that can be entered into any SIP device, including our PBX. This option makes sense when the venue already has Telavox and does not want a second operator. The credentials are issued by support to the company administrator: they cannot be found by self-service.

What to enter in the admin panel

What to set up at the provider: request SIP details for your own PBX as the company administrator → allow the operator's network 80.83.208.0/20 on the firewall → disable "SIP ALG" and intrusion prevention on intermediate equipment, as Telavox itself requires → route the Norwegian numbers to that account.

Pitfalls ⚠️ The operator states outright that it is not responsible for third-party equipment and does not troubleshoot it. This is an account rather than a full trunk: the incoming call carries the account login, so with several numbers the lines cannot be told apart by number — create a separate account per number. Registration repeats every 3600 seconds (support can lower the interval to 240), and media goes over UDP in a wide port range. Which range Telavox draws Norwegian numbers from — its own or a partner's — is not described publicly; ask when ordering, because it decides who will port the number later. The codecs G.711 A-law/u-law and RFC 2833 tone dialling are confirmed by an independent compatibility test, but that test is old — ask the operator to fix the codecs in writing. Sources: Brandvägg och nätverk, Egen hårdvara — 09.09.2026.

ice — SIP Trunk as part of Bedriftsnett#

The country's third mobile network. Its SIP trunk is described as "a standardised telephony access connecting the company's telephone system to the public network" and is sold as an add-on to the Bedriftsnett cloud PBX. This is the lowest barrier to entry in Norway and the only local price list that starts at a small number of channels:

A geographic number within the range costs NOK 3.20/month, domestic traffic is NOK 0.49 per connection plus NOK 0.49/minute, and calls inside the company are free. Bedriftsnett itself: NOK 990 setup, NOK 39/month per user, NOK 99/month for the main number.

ice does not publish the SIP host, the port, the transport or the authorisation mode — they are issued at connection time, which is why there is no "what to enter" table here. The list of questions to put to the account manager before signing is in What to ask the provider; at a minimum that is the server address, the port, the mode (registration or by IP), the codecs and the number format in incoming calls.

⚠️ The ice trunk is tied to Bedriftsnett, so the invoice will also include the cloud PBX you are not going to use — treat that as the price of entry. Sources: Tilleggstjenester, Bedriftsnett — 09.09.2026.

Telia Norge — SIP Trunk#

The country's second largest operator; the trunk is described as "connecting the company's switchboard to Telia's network" and, besides Microsoft 365, supports "the other telephony servers that are widespread on the Norwegian market" — specific PBXs are not listed. Prices are published in full (excl. VAT): a voice channel is NOK 60/month, a number NOK 2.90/month, a burst channel NOK 30/month, trunk setup NOK 990 and an order of new numbers NOK 1,000; domestic traffic is NOK 0.49 per connection plus NOK 0.49/minute.

The server address, the port, the codecs and the authorisation mode are issued at connection time, so there is no "what to enter" table here either. Two facts that matter to us do follow from the price list, though:

• encryption of signalling and media is a separate paid option (NOK 499/month), which means that by default the trunk is unencrypted and compatible with us;
• presenting your own number on outbound calls is included in the service free of charge.

⚠️ Do not order the encryption option "just in case": with TLS and SRTP our PBX will not bring the trunk up at all — see network requirements. And watch the wording about "validated" caller numbers: presenting a number the operator has not assigned to you means the call is billed to the trunk's technical main number. Sources: SIP Trunk, Telia cloud services price list, rev. 01.12.2024 — 09.09.2026.

Operators that issue parameters under contract#

• GlobalConnect Norge (formerly Broadnet) — a Nordic corporate operator for which "the SIP trunk is the core of all telephony services". Any "SIP-based" switchboard can be connected, the trunk works over any internet connection, resilience is provided by two pairs of session border controllers, and number ranges in 50 countries fit on one trunk. Neither the server address, nor the ports, nor the authorisation mode are on the website, and sales go through a "contact us" form only; the operator targets medium and large companies, so for a single venue this is a heavy way in.
• Phonero — a Telia Norge brand (an independent operator until 2016). The trunk is delivered over an internet line from any provider, but it is sold "from 30 voice channels up to a practically unlimited number", and the list of certified PBXs on the site is years out of date. For a venue the product makes no sense by scale; the network behind it is the same as Telia's, but the contract and the price list differ.

Put the same list of questions to both operators — What to ask the provider. Ask separately whether the service comes with mandatory signalling encryption: for an operator's session border controller that is a common default, and it does not suit our PBX.

Who will not work#

• Altibox and local fibre companies (Lyse, Viken Fiber, Haugaland Kraft, Signal, Istad Fiber and other franchise partners). The "SIP Trunk" product page has disappeared from the Altibox website — as of 09.09.2026 its address returns a general support hub, and telephony itself is being wound down; the operator names ice as the alternative. Check the exact shutdown date with your own fibre company — and port the number in advance: once the contract ends, the right to port survives for only a month.
• Unifon and other resellers (MR Mobile, Digihuset, NetNordic). They have neither their own network nor their own trunk: what is sold is the principal operator's platform, and the server address and the login will still come from Telia, Telenor or ice. A reseller is useful as a sales and support channel, but the contract must have a "SIP Trunk" or "IPT Flerbruker" line rather than "Bedriftsnett user": substituting a cloud PBX for a trunk is the most common mistake in such a purchase.
• Puzzel and Zisson — Norwegian cloud contact centres. They receive telephony rather than sell it outwards: numbers are brought into them from an operator, and a customer's own PBX is not part of the design. If the venue is already on such a platform, the number still sits with a partner operator — bringing it to us needs either porting or a second trunk at the same operator.

International providers with Norwegian numbers#

⚠️ A caveat that matters for this whole section. Norwegian numbering rules forbid offering Norwegian numbers "for permanent use outside Norway" without Nkom's permission, and since November 2022 operators have been stopping incoming international calls that carry a Norwegian fixed number as the caller ID (since 2024 the same applies to mobile numbers). So an international number in Norway is primarily an inbound number; outbound calls with a Norwegian caller ID are better routed through a Norwegian operator.

The trunk parameters of international services are the same for every country — see the provider's card in the catalogue when adding a trunk; only the Norwegian specifics are below.

• DIDWW — geographic numbers in 19 regions (Oslo 21/22/23, Hordaland 53/56, Rogaland 51, Nordland 75, Finnmark 78, Akershus 64 and others), plus toll-free and universal international toll-free; no Norwegian mobile or national numbers. Emergency calling is supported, porting is possible, inbound SMS is not offered.
• Telnyx — Norwegian geographic numbers from $1/month, porting through their own procedure.
• Twilio — geographic, M2M (+4759) and toll-free (+47800); a physical address in Norway is mandatory for both companies and private persons, and a PO box is not accepted. A company needs a registry extract, an organisasjonsnummer and a power of attorney.
• Zadarma — geographic numbers by region (Oslo 21, Rogaland 51, Telemark 35, Nordland 75, Finnmark 78, Buskerud 31); a company registration certificate, a copy of an ID document and an address in the country are required; porting an existing number is free.
• Sonetel — geographic and 800 numbers from $2.39/month, but with two hard caveats: only those located in Norway may buy a number, and a Norwegian number cannot be presented on outbound calls.

Common to all international services: you may present only your own number on outbound calls, calls to 110/112/113 are either a separate service or unavailable, and a geographic number requires a Norwegian address — so a micro venue without a Norwegian legal entity will get a local number through an aggregator at best.

Number porting#

• The right is set out in law and free for the subscriber. A subscriber may keep their number regardless of which provider they use; after a contract ends, the right to port survives for at least a month. The losing operator may not delay porting because of a subscriber's debt.
• The deadlines are strict. The number must be activated at the new operator within one working day of the date agreed with the subscriber, and the service interruption must not exceed one working day; if it fails, the losing operator must restore the service on the previous terms.
• The request is filed by the new operator, and it is obliged to obtain a written power of attorney from you — an email or an SMS will do if it identifies the subscriber unambiguously.
• Marketing is restricted: the losing operator may not use information about the porting in its advertising during the transfer and for 14 days afterwards.
• ⚠️ A number from a fibre operator may be tied to the physical connection. Port first, disconnect the internet afterwards — in the reverse order the number is lost.
• The emergency address is tied to the contract, not to the SIP registration: when the venue moves, update it with the operator. At Telenor these addresses live in a separate system, and keeping them current is the customer's duty.

Rules and documents#

If it does not work#

1. Incoming calls arrive only sometimes. Telenor has three equal access points, GlobalConnect has two pairs of session border controllers. A trunk recognises incoming calls by its SIP host, so a call from the second node looks like it comes "from an unknown address". Put the operator's name in the "SIP host" field rather than a single IP address: the name resolves to all of its nodes at once. A distinctive sign of this failure at Telenor is that the operator re-routes an unanswered call to another access point, which from the outside looks like "calls get through now and then".
2. The operator does not answer on port 5060. For everyone except Telenor and Telavox the port is not published, and 5060 is a sensible default rather than a fact from the contract. Press Check connection: if the server stays silent, ask support for the port and the transport.
3. The trunk does not come up at all and the operator mentions encryption. At Telia, signalling and media encryption is a paid option; at Telavox and GlobalConnect it is a setting on their side. Ask for plain UDP or TCP: our PBX does not support TLS or SRTP for trunks.
4. The call connects but there is no sound. The codecs did not negotiate. The Norwegian standard is G.711 A-law, which we have; ask the operator to enable G.711 in writing — network requirements and compatibility.
5. Incoming calls arrive but the line is not selected. Two causes. First: at Telavox the incoming call carries the account login rather than the number. Second, specific to Norway: two eight-digit numbers that differ only in the first digit produce the same seven-digit tail and merge into one line — compare your numbers against each other.
6. Outbound calls are rejected or go out with the wrong number. You may present only numbers from your own contract: the operator must block a call if you have no right to the number. Remove the foreign number from the "Present as" field on the Outbound tab.
7. A calling campaign breaks off after the third call. Telenor enforces anti-fraud limits in its network: no more than 3 simultaneous calls with the same caller ID to "risky" countries and no more than 2 simultaneous forwarded calls to one country. The limits are lifted by a request to the operator's support.

Causes that do not depend on the country are in If calls do not go through.

Frequently asked questions#

Which provider should I choose if nothing is connected yet?#

If price and speed matter most — ice: 4 channels for NOK 240/month and a number for NOK 3.20/month, exactly the scale of a single venue. If predictable setup matters most — Telenor IPT Flerbruker: the only operator in the country whose server address, ports and authorisation mode are known before the contract is signed, so the trunk can be entered in the admin panel straight away. Telia is a reasonable middle ground on price, but its parameters are "in the contract" too.

Why do most Norwegian operators have no "what to enter" table?#

Because they do not publish their trunk parameters: the server address, the port, the authorisation mode and the codecs are issued by an engineer at connection time. That is the market norm rather than a refusal — just plan a separate step for finding them out and ask the questions from What to ask the provider before signing, not after.

Can I get a Norwegian number if my company is registered outside Norway?#

Practically no. Local operators sign contracts against an organisasjonsnummer with checks on the director and the board, while international services require a physical address in Norway — Twilio states outright that a PO box is not accepted, and Sonetel sells a number only to those located in the country. Without a Norwegian presence the remaining option is an international aggregator, with all the caveats about outbound calls.

Does Norwegian caller ID blocking get in our way?#

Not for incoming calls: the trunk runs over a Norwegian operator's internal interconnect, while the filters target calls from abroad with a Norwegian caller ID. For outbound calls it does, but in one place only: you may present only numbers issued under your own contract. That is exactly why the "buy a Norwegian number from a foreign aggregator and call from it" scheme is unreliable.

What is this story about eight-digit numbers and "one line"?#

A line in the admin panel is matched by the last seven digits of the number, while Norwegian numbers have eight. The landline 21 23 45 67 and the mobile 91 23 45 67 produce the same tail 1234567, so the "this number → this scenario" rule will fire for the wrong number. With one line there is no problem; with a second one, compare the numbers and ask the operator for a different one if they match.

How many simultaneous calls should I order?#

A venue usually needs two or three: one conversation with a guest, another with a courier or a supplier. But the minimum packages in the country are larger: ice starts at 4 channels, Phonero at 30 outright. Ask about the number of channels before signing: "busy after the second call" almost always means a contract limit rather than a fault.

Sources#

All links were checked on 09.09.2026.

Providers

• Telenor — Oppgradert IPT Flerbruker (access point addresses, ports, DNS, list of approved PBXs): https://www.telenor.no/bedrift/telefoni/ip-telefoni/oppgradert-ipt-flerbruker/
• Telenor — Tjenestebilag IPT (access variants, fixed IP, lead times, anti-fraud): https://www.telenor.no/binaries/bedrift/vilkar/IPT%20-%20Tjenestebilag.pdf
• Telenor — IP-telefoni (product overview): https://www.telenor.no/bedrift/telefoni/ip-telefoni/
• Telenor — "Ny sperre hindrer politisvindel fra falske numre" (caller ID spoofing block, November 2022): https://www.telenor.no/online/sikkerhet/aktuelt/ny-sperre-hindrer-spoofing-av-fastnett-numre/
• Telavox — Brandvägg och nätverk (network 80.83.208.0/20, UDP 5060, registration every 3600 s): https://support.telavox.com/sv_SE/natverk/brandvagg-och-natverk
• Telavox — Egen hårdvara (SIP details for your own equipment): https://support.telavox.com/sv_SE/fasta-telefoner/egen-hardvara
• Telia Norge — SIP Trunk: https://www.telia.no/bedrift/telefoni-og-kundebetjening/sip-trunk/
• Telia Norge — Priser for skybaserte telefoni- og samhandlingstjenester, rev. 01.12.2024: https://www.telia.no/contentassets/86ee6cdb4959463989c33dce433705db/priser---telias-skybaserte-samhandlingstjenester.pdf
• ice bedrift — Tilleggstjenester (SIP Trunk and Bedriftsnett price list): https://www.ice.no/bedrift/mobilabonnement/priser/tilleggstjenester/
• ice bedrift — Bedriftsnett: https://www.ice.no/bedrift/bedriftsnett/
• GlobalConnect Norge — SIP trunk: https://bedrift.globalconnect.no/produkter/telefoni/sip-trunk/
• Phonero — Fast og IP-telefoni: https://www.phonero.no/produkter-og-tjenester/fast-og-ip-telefoni
• Altibox Bedrift — the former SIP Trunk page (now a support hub): https://www.altibox.no/bedrift/vare-tjenester/sip-trunk/
• Unifon — IP telefoni: https://unifon.no/produkter-og-tjenester/ip-telefoni/
• Puzzel — Contact Centre: https://www.puzzel.com/products/contact-centre
• Zisson: https://www.zisson.no/
• AudioCodes — Mediant SBC for Telenor SIP Trunk, LTRT-12355 (codecs, transport, tone dialling): https://www.audiocodes.com/media/9656/ltrt-12355-mediant-sbc-for-telenor-sip-trunk-with-genesys-contact-center-configuration-note.pdf
• innovaphone — Telavox SIP-Trunk Compatibility Test: https://wiki.innovaphone.com/index.php?title=Howto%3ATelavox_SIP-Trunk_-_SIP_Provider_Compatibility_Test

Regulator and law

• Nummerforskriften (FOR-2004-02-16-426) — the structure of the numbering plan, emergency numbers, allocation of ranges: https://lovdata.no/dokument/SF/forskrift/2004-02-16-426
• Ekomforskriften (FOR-2024-12-20-3410) — subscriber identification, power of attorney, number porting, caller ID, blocking of spoofed calls: https://lovdata.no/dokument/SF/forskrift/2024-12-20-3410
• Nkom — Alle nummerserier for norske telefonnumre: https://nkom.no/telefoni-og-telefonnummer/telefonnummer-og-den-norske-nummerplan/alle-nummerserier-for-norske-telefonnumre
• Nkom — Veileder for tilbydere av ekomtjenester, January 2025: https://nkom.no/ekom-markedet/plikter-og-regelverk/plikter-for-tilbydere-av-ekomtjenester/
• Nkom — "Nå har det blitt vanskeligere å spoofe mobilnummeret ditt" (mobile anti-spoofing filter, 2024): https://nkom.no/aktuelt/na-har-det-blitt-vanskeligere-a-spoofe-mobilnummeret-ditt

International providers

• DIDWW — Norway local numbers: https://www.didww.com/phone-numbers/all-phone-numbers/Norway/Local
• Telnyx — Norway phone numbers: https://telnyx.com/phone-numbers/norway
• Twilio — Norway regulatory guidelines: https://www.twilio.com/en-us/guidelines/no/regulatory
• Zadarma — Norwegian virtual numbers: https://zadarma.com/en/tariffs/numbers/norway/oslo/
• Sonetel — Norway phone number: https://sonetel.com/en/help/help-topics/telephony/countries-supported/norway-phone-number/

Related pages#

• Connecting a provider's number to the PBX — the general steps, trunk modes, network, connectivity check.
• Setting up SIP phones — how to connect desk phones and DECT handsets to extensions.