Ukraine: SIP providers and connecting a number to the PBX

We do not issue numbers: the venue buys a Ukrainian number from a local provider and brings it into its own PBX as a trunk. The steps that are the same everywhere — trunk modes, form fields, network and connectivity check — are described in the overview «Connecting a provider's number to the PBX»; this page covers only what is specific to Ukraine: whom to buy a number from, what that provider hands you and what of it goes into the admin panel.

In brief#

• The fastest route is Stream Telecom or Ringostat. These are the only two providers in the country that publish the parameters for connecting a third-party Asterisk officially: the server address, the mode and the codecs are known in advance, and our fields map one to one. Stream Telecom is preferable — the incoming call arrives on the number itself, so «Lines» can route different numbers to different scenarios as intended.
• A landline number means Ukrtelecom or Datagroup-Volia/Vega, a mobile one means Kyivstar or the reseller SIP Hub. They do offer trunking and say so publicly, but the host, the port and the authorisation mode only come with the contract: talk to the account manager using the checklist in «What to ask the provider».
• ⚠️ The main local catch — lifecell does not connect to us directly. The operator has the most complete documentation in the country, yet all three connection points work over SIP TLS only, while our PBX runs trunks over UDP and TCP. A lifecell number is taken through an intermediary with a cloud PBX.
• ⚠️ The second catch — a state check before the firewall is opened. The operator opens access for your IP addresses only after a check by the National Centre for Operational and Technical Management of Networks (NCU): lifecell describes it as «from 3 hours to 1 week» plus its own security review. Your PBX address must be known before the paperwork is filed, and changing it means going through the procedure again.
• ⚠️ The third — a Ukrainian number is longer than our «tail». Every national number is exactly 9 digits, while a line is matched by the last seven: for mobile numbers that cuts off the operator code, so 067 123 45 67 and 050 123 45 67 become one and the same line for the PBX. Details are in the numbering section below.
• Paperwork. A SIP number is connected directly to your own equipment only for Ukrainian legal entities and sole traders; an individual or a foreign company is left with an intermediary's cloud PBX or an international provider. In any case a trunk only works on a dedicated PBX with a static IP — how the two trunk modes work is explained in the overview.

Numbers in the country#

How the number arrives. Confirmed examples: Stream Telecom puts the number itself into the call (80011000123), while lifecell and Vega use the 380XXXXXXXXX form, that is E.164 without the plus. This is the typical Ukrainian format; in the «Number» field on the «Lines» tab you may type it in any form — the PBX matches the last seven digits.

⚠️ What this costs you with several numbers. For a landline number the last seven digits are the whole subscriber number, so landline lines are told apart correctly. For a mobile number those same seven digits do not include the operator code: +380 67 1234567 and +380 50 1234567 are indistinguishable for the PBX, and so are a landline and a mobile number with the same ending. The call is accepted, but the rule «this number → this scenario» fires on the wrong line. When adding a second and further lines, compare the endings and ask the provider for a different number.

Who issues a number with a SIP trunk#

The first three rows are the providers with published parameters, and each has a «What to enter in the admin panel» table below. Kyivstar and lifecell get their own cards: the first does offer a trunk but hands out the credentials with the contract, the second is technically incompatible with our PBX. The remaining local operators advertise the service but disclose the host, the port and the authorisation mode only under contract.

Stream Telecom#

A national business telecoms provider: landline and mobile SIP numbers, 0-800, international numbers, a cloud PBX and a call centre. The only company in the country that has published a ready Asterisk configuration example, which is why connecting takes a day or two with no sales correspondence.

Getting connected: order a number of the type you need and receive the number and the password by e-mail. Billing is per second, VAT on top.

What to enter in the admin panel (Telephony → «Trunks and connections» → «Add provider» → the «SIP trunk (custom provider)» card):

The codecs in the provider's example are G.711 a-law and u-law, exactly what our PBX speaks.

What to set up on the provider's side. Order the number (landline, mobile SIP or 0-800), request the number of simultaneous channels you need, confirm that outbound calls with this number as the CallerID are allowed, and hand over your PBX's static IP if they ask to whitelist it. The address is on the «Server» tab.

Catches ⚠️

• The provider's example still contains another company's context — the guide was clearly copied, so the small print (port, transport, DTMF mode) is worth confirming with support rather than taking literally.
• On some plans the provider's cloud PBX works with its own numbers only. If you want to bring a third-party number to us through them, you need the appropriate plan.

Source: Asterisk setup at Stream Telecom — 09.09.2026.

Ringostat#

A Ukrainian call-tracking and cloud PBX platform, Kyivstar's partner for cloud telephony. It officially supports connecting a third-party PBX as a SIP client and takes your own numbers in SIP format free of charge, so it works both as a source of a number and as an adapter to an operator that does not hand out trunks itself.

Getting connected: create a SIP account in the panel, section «Virtual PBX → SIP accounts».

What to enter in the admin panel

For office PBXs the provider limits the codecs literally: «Only g.711a (alaw), g.711u (ulaw)», DTMF is RFC 2833, STUN is off. Our PBX speaks the same codecs and the same DTMF.

What to set up on the provider's side. Create the SIP account, be sure to add it to the forwarding scheme — without that there will be no incoming calls at all — and add the numbers: your own are connected free of charge in SIP format.

Catches ⚠️

• The call arrives on the SIP account, not on the dialled number: lines cannot be told apart by the last seven digits. If you have several numbers and need to route them to different scenarios, create a separate SIP account per number and a separate trunk on our side.
• This is a PBX on top of a PBX: greetings, menus and call recording exist on both sides, and the logic is best kept in one place — ours.

Sources: typical SIP setup, FreePBX as a SIP client — 09.09.2026.

Intertelecom (Інтертелеком)#

A former CDMA operator that today sells SIP telephony and 094 mobile numbers. The operator states plainly that the choice of equipment and software is up to the subscriber — that is, the SIP account can go into your own PBX.

Getting connected: the number is arranged with the operator, everything else is done in the services.intertelecom.ua account panel.

What to enter in the admin panel

What to set up on the provider's side. In the panel, set the SIP password, enable «Послуги та тарифи → Переадресація виклику» to SIP, and look up your SIP ID.

Catches ⚠️

• The login is the SIP ID rather than the number, so the incoming call most likely arrives on the login: the PBX will not recognise the line by its number. Keep one number per trunk.
• The codecs and the number of simultaneous calls are not stated in the guide — ask support before ordering, our PBX needs G.711 or G.722.

Source: Intertelecom SIP telephony and the setup guide attached to it — 09.09.2026.

Kyivstar (Київстар)#

The country's largest operator: mobile, landline, 0-800 and non-geographic 0-897 numbers. It does not build its own cloud PBX — it offers a partner one — and hands the bare trunk to your station. The service description covers two different products: a SIP trunk («a virtual IP line… the service is connected to an IP address»), which is authorisation by IP without registration, and a SIP line with a login and password on the gateway you are given.

The operator does not publish technical parameters: the gateway address, the port, the codecs and the number format come with the contract, so there is no «what to enter» table here — work through the checklist in «What to ask the provider».

How to order. Corporate sales: large business — 044 393 33 93, 0 800 303 393; small and medium — 0 800 300 000, 044 490 00 00. You will need the company registration code, the number of numbers and a billing e-mail; then comes registration in the operator's system and signing the documents with a qualified electronic signature. After activation you receive the SIP login, the SIP password, the gateway address and the number in international format.

What you must clarify. Have the numbers converted «to SIP format» (they cannot be connected otherwise); for the IP trunk, hand over your PBX's static address; ask about outbound calls separately — outbound calling from the operator's mobile SIP numbers is restricted, and a number bought «for incoming» will not become an outbound one by itself; confirm the form in which the number arrives in the call.

⚠️ There is a cheap surrogate for «making a number virtual» — plain call forwarding via a USSD code to somebody else's SIP number. That is not a trunk: there are no outbound calls, the caller sees a different number, and the forwarding is billed. For a venue it only works as a temporary stopgap.

Source: multi-channel internet telephony for business — 09.09.2026.

lifecell (Bizcell) — why it will not connect directly#

The third mobile operator (063/073/093) with the most complete technical documentation in the country: the connection points, the security scheme and ready Asterisk configuration examples are all published. There is exactly one problem, and it is fatal: all connection points work over SIP TLS only, while a trunk in our PBX speaks UDP and TCP. A «TLS/SRTP only» provider will not do — the same is stated in the «Network and compatibility» section of the overview.

What to do if you specifically need a lifecell number. Take it through an intermediary with a cloud PBX — Stream Telecom, Ringostat, Binotel and Phonet all have ready connection profiles in the operator's own documentation — and get a normal UDP trunk from that intermediary. The second option is a number from a different operator.

Useful bits from the same documentation, should you end up talking to the operator anyway: the codecs are G.711 a-law and u-law only; an incoming call arrives on the number in the 380XXXXXXXXX form; every number line is a separate SIP channel with its own credentials, that is one number equals one trunk; the server runs TLS 1.0 by default and version 1.2 is enabled by an account manager; before the firewall is opened your addresses go through the NCU check — «from 3 hours to 1 week».

Source: Bizcell connection scheme — 09.09.2026.

Operators that hand out parameters with the contract#

These providers do have a trunking service and advertise it publicly, but the host, the port, the authorisation mode and the number format arrive in the connection e-mail. State your request plainly: «a SIP trunk to our own IP PBX, your cloud PBX is not needed» — otherwise they will sell you their station instead of a channel to yours.

• Ukrtelecom — the national fixed-line operator, landline numbers in every region, 0-800 and 0-900. Two products: SIP Trunk («an unlimited number of lines», numbers preserved within the city, per-second billing) and SIP Line — a direct local number with calls including emergency services and 0-800/0-900, fax support and optional equipment rental. Sales — 0 800 506 801.
• Datagroup-Volia / Vega — the largest alternative fixed-line operator. «SIP-Trunk is a virtual IP line that lets you combine several PBXs into one channel»; numbers for Kyiv 044, Dnipro 056, Zaporizhzhia 061, Ivano-Frankivsk 034, Kryvyi Rih 0564, Lviv 032, Mariupol 0629, Mykolaiv 0512, Odesa 048, Kharkiv 057, Kherson 0552, Chernihiv 0462, plus 0-800 and non-geographic 0-891; the fee per number in a SIP session starts at 12 UAH per month. The operator notes that connecting with several IP addresses improves resilience — so IP authorisation is likely available, ask about it directly. Sales — 0 800 211 000, sales_smb@datagroup.ua, Vega — 044 224 55 05.
• Vodafone Ukraine — mobile SIP numbers do exist, including converting an existing contract number into SIP format, but they are sold through partners rather than at retail. Ask about the number of incoming channels: partner plans include one by default, each additional one is paid for, and a second simultaneous call gets a busy tone. The caller sees the client's permanent mobile number; substitution is not offered.
• SIP Hub Ukraine — a reseller of multi-channel mobile SIP numbers of every Ukrainian operator without GSM gateways, plus landline numbers and 0800. The condition for connecting straight to your equipment is explicit: «SIP numbers are provided only to Ukrainian legal entities and sole traders for use on the territory of Ukraine». ⚠️ This is resale: if the operator blocks a number, it is replaced with a new one, and for a number printed on your storefront or menu that is a risk. If the number turns out to be a lifecell one, the trunk may come over TLS — clarify before signing.
• UniTalk — a Ukrainian platform with a separate «SIP Trunk» product and numbers in more than 150 countries; it states that you can also connect your existing numbers. The parameters are issued at connection time.
• Binotel and Phonet — well-known Ukrainian cloud PBXs, but they do not publicly describe an «outbound trunk into your station» product: their model is the reverse, your numbers are brought into their PBX. If the venue already runs one of them, ask support directly whether they hand out a SIP trunk to an external station; until you have an answer, assume they do not and buy the number from an operator.

International providers with Ukrainian numbers#

An international provider fits when the local operator will not give you a trunk or the venue is not a Ukrainian legal entity. Their trunk parameters are the same for every country — see the provider's card in the admin panel catalogue and in the overview.

• Zadarma — the widest Ukrainian coverage: 044 Kyiv, 056 Dnipro, 057 Kharkiv, 048 Odesa, 0322 Lviv, 061 Zaporizhzhia, 0512 Mykolaiv, 0532 Poltava, 0352 Ternopil, 0332 Lutsk, 0342 Ivano-Frankivsk, 0372 Chernivtsi, 0412 Zhytomyr, 0312 Uzhhorod, 043 Vinnytsia, 036 Rivne, 038 Khmelnytskyi, 0536 Kremenchuk, plus mobile 063, national 091, VoIP 089 and 0800. The fee is 3 dollars a month and each number comes with two lines. Documents: for landline numbers — company registration or an ID document plus an address in the country of the number; for the national 091 — a document issued by Ukraine itself. ⚠️ The number does not arrive in the standard field of the call, so our «Lines» cannot tell numbers apart: keep one number per trunk.
• DIDWW — Ukrainian numbers are in the published coverage, both modes work (a static endpoint by IP and registration), and there is a setting to pass the dialled number inside the call — of the international options this is the best fit for the «line = number» scheme. Check the document requirements on their Ukraine page.
• Telnyx, Twilio and other large platforms — Ukrainian +380 numbers are not confirmed in their public materials; search for a number in the account panel itself, a marketing page «about Ukraine» is not proof of inventory.
• Virtual number resellers advertise a «Ukrainian number» with forwarding instead of a trunk: there are no outbound calls and the origin of the number is opaque. For a venue with a real business in Ukraine that is worse than a local operator.

Number porting#

A mobile number can be ported to another operator while keeping the number, and this works for business too. The term is one working day (or later at the subscriber's request, but no more than 30 days). A company needs an identity document of the director or sole trader and the registry data — the name and the code; several numbers of the same company at the same operator are ported with a single application. The application is filed with the operator the number moves to; Kyivstar and lifecell have dedicated MNP pages for business.

A landline number is kept when you move within the same city — Ukrtelecom, Datagroup and Kyivstar all state this.

What porting does not solve: a SIP number connected directly to your own equipment is still issued only to a legal entity or a sole trader, and Crimea and the combat zone are excluded from the service area.

Rules and paperwork#

If it does not work#

The generic causes (a wrong password, one-way audio, a 403 on outbound calls) are covered in «If calls do not go through». What the provider actually replies is shown by the SIP trace in the trunk menu.

Frequently asked questions#

Which provider should I choose if I do not have a number yet?#

Stream Telecom: the parameters are published, the mode is registration, the codecs match ours, and the incoming call arrives on the number itself, so «Lines» and the routing rules work as intended. Connecting takes a day or two. If the venue already uses Ringostat call tracking, taking the number there is simpler.

Can I connect a Ukrainian number if the company is not Ukrainian?#

Not directly: local operators and resellers sell SIP numbers only to Ukrainian legal entities and sole traders. Two routes remain: an intermediary's cloud PBX that registers the number in its own name, or an international provider such as Zadarma or DIDWW — although even there a document issued by Ukraine is required for the mobile 063 and the national 091.

Why does lifecell not connect if it has an Asterisk guide?#

The guide exists, but the transport is wrong: all of the operator's connection points work over SIP TLS, while our PBX runs trunks over UDP and TCP. «There is an Asterisk guide» and «compatible with us» are different things. A lifecell number is taken through an intermediary that maintains the TLS leg to the operator itself.

How long does connecting take?#

With published parameters (Stream Telecom, Ringostat) — one or two days. With an operator contract, allow from a week to a month: on top of the usual paperwork there is a state check of your IP addresses before the firewall is opened, described by lifecell as «from 3 hours to 1 week».

Will a mobile number both receive and place calls?#

Not by default. At Kyivstar outbound calling from mobile SIP numbers is restricted by the operator, and partner numbers do allow outbound calls but with a different channel count inbound and outbound. Ask about outbound calls and channels before paying, not after.

Sources#

• Stream Telecom — Asterisk setup (sip.streamtele.com, configuration example) — 09.09.2026
• Ringostat — typical SIP setup (sip.ringostat.com:5060, codecs, DTMF) — 09.09.2026
• Ringostat — FreePBX as a SIP client — 09.09.2026
• Ringostat — connecting Ukrainian mobile numbers — 09.09.2026
• Intertelecom — SIP telephony — 09.09.2026
• Kyivstar — multi-channel internet telephony for business — 09.09.2026
• lifecell Bizcell — connection scheme (connection points, TLS, NCU check) — 09.09.2026
• Ukrtelecom — SIP Trunk and SIP Line — 09.09.2026
• Datagroup — SIP-TRUNK and Vega — SIP trunk — 09.09.2026
• SIP Hub Ukraine — SIP number connection terms and Vodafone mobile SIP number — 09.09.2026
• UniTalk — SIP Trunk — 09.09.2026
• Zadarma — phone numbers in Ukraine (codes, prices, documents) — 09.09.2026
• National Numbering Plan of Ukraine (order No. 758 of 26.08.2023) — 09.09.2026
• NKEK — number porting (MNP) — 09.09.2026

Related pages#

• Connecting a provider's number to the PBX — the steps that are the same for every provider.
• Setting up SIP phones — how to connect desk phones and DECT handsets to extensions.