Tanzania: SIP providers and connecting a number to your PBX

We do not issue phone numbers: the venue buys a Tanzanian number from a provider and connects it to its own PBX as a trunk. Everything that is the same in every country — trunk modes, form fields, network requirements and connectivity checks — is covered in the overview “Connecting a provider's number to your PBX”. This page covers only the Tanzanian part: where to get a number, what to enter in the admin panel and what people trip over in this country.

The data was collected on 10 September 2026 from provider websites and documents of the regulator TCRA; links are in the “Sources” section.

In brief#

• You can buy a trunk for your own PBX in Tanzania: the licence is required from the seller, not from the venue. Under TCRA's converged licensing framework, voice and VoIP are sold under an Application Services licence; a venue's corporate PBX is a subscriber of a licensee and needs no licence of its own.
• The defining feature of this country: not a single Tanzanian provider publishes trunk parameters. No host, no port, no transport, no codecs, no authorisation mode appears on any local carrier's page. That is why the tables below honestly say “from the service order” — the details arrive with the contract, and in this country that is the normal course of events.
• The only carrier that names “a SIP trunk to your IP-PBX” as a product is the state-owned TTCL. Its “SIP Trunk Solution” page describes exactly our setup (“a business with an installed IP-PBX”), but the application is offline only: a service office, 100 from a TTCL line or 022 210 0100 from any network.
• Next by suitability come SimbaNET (its own voice switches in Kenya, Uganda and Tanzania, local East African numbers) and Liquid Intelligent Technologies, whose Tanzanian entity is Raha Limited in Dar es Salaam.
• Your first question to the sales manager is whether the provider accepts a PBX hosted in a cloud outside Tanzania. The wording used by local carriers (“connect your premises”, “over our access link”) points to a trunk terminating on a PBX on their own line; in neighbouring Kenya the answer to that question was blunt: a trunk is only possible if the PBX is in the country. Get the answer before you pay.
• A number is registered biometrically. Subscriber identities are registered through the national NIDA system: a company needs certified copies of its TIN, Business Licence and certificate of incorporation. For a foreign company with no local entity that practically closes the door to a local number — international aggregators remain.
• The number has nine digits, while a line is matched on the last seven. 22 2100100 (Dar es Salaam) and 24 2100100 (Zanzibar) produce one and the same tail.

Numbers in Tanzania#

The country code is +255. The national dialling prefix is 0, the international prefix is 000; East African Community neighbours have their own codes: 005 for Kenya, 006 for Uganda. The national number (N(S)N) is 9 to 12 digits, but ordinary landline, VoIP and mobile ranges are exactly 9 digits.

• Nobody publishes the format in which the number arrives in an incoming call. Expect one of two options — nine national digits without the leading zero (22XXXXXXX, 41XXXXXXX) or the international format; with international aggregators it is almost always E.164. On your first connection check the SIP trace to see what the provider sends, and only then create lines.
• The seven-digit tail. A line is matched on the last seven digits, while the number has nine: the area code never takes part in the match. One number per venue is safe; with two or more, check the tails by hand.
• Codecs. No Tanzanian provider publishes its codec list. Ask explicitly for G.711 a-law/µ-law or G.722 in your application — that is what the PBX speaks; we do not have G.729.
• Emergency numbers are 112 (single number, police), 114 (fire) and 115 (ambulance). Emergency calls are not served through our PBX — keep an ordinary phone on the shift.

Who sells a number with a SIP trunk#

Below are cards for the four providers that advertise a trunk to a third-party PBX as a product. All of them hand over the credentials at connection time, so go to the sales manager with a ready list of questions: “What to ask your provider”.

TTCL — the only carrier with a “SIP trunk” product#

The state-owned fixed-line incumbent (Extelcoms House, 32 Samora Street, Dar es Salaam, +255 22 210 0100, info@ttcl.co.tz), owner of the national backbone and holder of the 41 range — “non-geographic enterprise numbers, VoIP services”. It is the only Tanzanian carrier that names connecting a third-party PBX as a product: “the SIP Trunk Solution allows businesses with an installed private branch exchange (IP-PBX) to use real-time communications including VoIP”. The same enterprise catalogue still offers ISDN BRI/PRI and toll-free 0800-11-XXXX numbers — the trunk is positioned as a replacement for a PRI.

How to order. Offline only: “visit the nearest TTCL customer service office available countrywide, or call 100 using your TTCL line, or call 022 210 0100 from any network”. There is no price on the page.

What to enter in the admin panel (Telephony → “Trunks and connections” → “Add provider”):

What to set up on the provider's side: give them the static IP of your PBX from the “Server” tab and tell them the PBX is in a cloud → agree the number of simultaneous calls → ask in writing for the host, port, transport and authorisation mode → keep G.711 a-law/µ-law and G.722 in the codec list → route the required numbers (041…, a landline 022…, a toll-free 0800…) to the trunk.

Pitfalls ⚠️

• The carrier is geared towards customers on its own access link — fibre or ISDN. Ask “will you accept a trunk to a PBX in a cloud outside Tanzania?” first: in this region a refusal is the standard answer.
• The storefront has not been updated for years (ISDN is still listed as an active product) — confirm terms and prices by phone, not by the page.
• The application is offline: timelines depend on the office, so plan in weeks rather than days.

Source: TTCL — SIP Trunk Solution and TTCL — Enterprises Products — 10.09.2026.

SimbaNET — a regional carrier with local numbers#

An East African operator that describes itself as working “as a local and international carrier in Kenya, Uganda and Tanzania”: last mile over fibre, VSAT and radio, its own voice switches in the countries of presence, interconnects with local carriers over STM1/E1 and real-time fraud control. Its voice portfolio names “SimbaTrunk, Voice SIP Trunk”, local East African DIDs and toll-free numbers outright. In form this is the closest offer in the country to our setup: a trunk outwards plus a local +255.

How to order. Through the sales department — sales@simbanet.net (the “Contact Us” form on the site does not work).

What to enter in the admin panel:

What to set up on the provider's side: add the static IP of your PBX to the allowlist → agree the number of channels → codecs G.711/G.722 → attach a local +255 to the trunk → warn them that the address may change if the server is rebuilt.

Pitfalls ⚠️

• The company is primarily a wholesaler — termination and transit traffic. A retail trunk for a single venue may be of no interest to them: ask about minimum volumes.
• The website has not been updated since 2021, and the only working channel is the sales mailbox.
• Check their voice licence in the public TCRA register of licensees before signing anything.

Source: SimbaNET — SimbaVoice — 10.09.2026.

Liquid Intelligent Technologies (Raha) — a trunk “to your premises”#

The Tanzanian arm of the pan-African Liquid group; the local entity is Raha Limited (IT Plaza, Ohio Street / Garden Avenue, Dar es Salaam, +255 688 111 222, support@liquid.tech), with more than 2,000 corporate customers. The service is described directly: “we also offer a SIP trunking solution that enables us to connect your premises directly to all fixed-line or mobile networks”. Advertised features include a configurable number of simultaneous calls per trunk, a selectable number of DIDs per trunk, a credit limit per trunk or per individual DID, and per-second billing from the first second.

How to order. Through corporate sales at the local office; there is no public price list and no self-service.

What to enter in the admin panel:

What to set up on the provider's side: the number of simultaneous calls → the set of DIDs per trunk → the static IP of your PBX on the allowlist → codecs G.711/G.722 → a credit limit on the trunk, so that a hacked extension cannot burn the balance overnight.

Pitfalls ⚠️

• The service page is pan-African and carries no country-specific detail — “in-country regulations apply” is explained at the Dar es Salaam office.
• The phrase “connect your premises” hints at a PBX on Liquid's own link. Ask about a cloud-hosted PBX before you pay.
• They also sell their own cloud PBX (OneVoice for Cloud PBX). Make sure the quote contains a trunk to your PBX rather than their PBX instead of yours.
• The group is sensitive about call recording — its Kenyan arm faced a regulator's decision over recording without consent. An announcement at the start of the call is mandatory.

Source: Liquid — Unified Communications and the Tanzania office — 10.09.2026.

PBX.IM — a Tanzanian number without a local company#

An international number aggregator with a country storefront: “connect your business phone system to Tanzania … with a reliable, cost-effective Tanzania SIP Trunk provider”. Its coverage table lists Dar es Salaam 22, Zanzibar 24 and “VOIP” 411 — the very non-geographic range of the numbering plan — plus toll-free, shared-cost and mobile numbers. The underlying networks are named as Vodacom, Airtel and Tigo (today's Yas).

What to enter in the admin panel:

What to set up on the provider's side: find the number you need in the portal before paying → buy it and attach it to the trunk → add the static IP of the PBX (if you choose IP mode) → check that outbound caller ID with your number is allowed → confirm the number of simultaneous calls.

Pitfalls ⚠️

• Which Tanzanian licensee stands behind the numbers is not disclosed. In a regulatory check the intermediary answers for it, not you — but it can also take the number away just as quickly.
• Verify that a specific number exists by searching the portal: country storefronts of aggregators often run ahead of the actual inventory.
• Promises of “set up in minutes” and “99.999% uptime” are unsupported marketing copy.

Source: PBX.IM — SIP Trunking Provider in Tanzania — 10.09.2026.

Who sells telecom services but no trunk to your PBX#

International providers with Tanzanian numbers#

Checked against provider storefronts on 10.09.2026:

• didlogic has the most specific country page: in its number-type table National +255 and Toll-Free 0800 are filled in, while the local landline and mobile cells are empty — so, judging by the storefront, it has no Dar es Salaam landline number. Activation takes up to 8 hours, or up to 48 hours if local documentation or address verification is required.
• Telnyx has a country storefront, but Tanzania is not on its list of countries where Telnyx holds its own licence. Verify availability by searching the account portal before you pay.
• DIDWW has a “SIP Trunk in Tanzania” page, yet the country is not confirmed in its machine-readable coverage map; DIDWW itself states that missing codes are quoted on request by email to sales.
• Twilio publishes termination only into Tanzania; there is no Tanzanian phone number page in its coverage. In other words, Twilio is fine for calling into the country, but not for getting a local number.
• CommPeak, AVOXI, FlyNumber, TollFreeForwarding all have “Tanzania virtual phone numbers” landing pages, and none of them has confirmed inventory: ask in writing about the number type, the range and the lead time.

Trunk parameters for international providers are the same in every country and are described in the catalogue cards shown when you add a provider: most of them use registration with a username and password from the portal, some use IP authorisation.

⚠️ Three general caveats. First: number registration in Tanzania is biometric, so an aggregator will either sell you a “national” +255 without a city tie or ask for documents. Second: only the number issued to you may be presented outbound — fill the “Show as” field with that number only. Third: emergency numbers 112, 114 and 115 do not work through an international aggregator.

Number porting#

• There is no working mobile number portability in the country. The mobile number portability regulations were adopted in 2018, but the launch kept being postponed: in TCRA's 1 November 2024 notification to the International Telecommunication Union, the field for the ported-numbers database reads “not applicable”. Check the current state with TCRA.
• Landline and VoIP numbers (022…, 041…) are not portable. The 41 range is assigned to TTCL in the numbering plan, and the geographic ranges belong to their holders. The practical conclusion: the number is tied to the carrier, so changing providers means changing the number. Plan for that in advance — a number printed on your signage and menu is a decision for years.
• Register the number to the company from the start. The identity is registered biometrically to a specific person or to a legal entity; a number registered to an employee leaves with them.
• ⚠️ Changing the public address of the PBX breaks a trunk with IP authorisation. Warn the provider in advance when the dedicated machine is rebuilt.

Rules and paperwork#

If it does not work#

1. The provider replies “a trunk is only possible if the PBX is in the country or on our own link”. This is the most common outcome in the region, and no setting fixes it. Ask before paying; if that is the answer, take a number from an international aggregator.
2. The provider offers voice encryption or port 5061. That is TLS, and for trunks our PBX supports only UDP and TCP without encryption; there is no SRTP either. Ask for plain UDP 5060; if the interconnect is encryption-only, the pairing will not work.
3. The call connects but there is silence. Usually a codec mismatch: nobody publishes their codec list, and the service order may contain only G.729, which we do not have. Ask them to enable G.711 a-law/µ-law explicitly on the trunk.
4. Registration is green but no calls arrive. Check whether the number is routed to your trunk on the provider's side, whether the “Accepts calls” checkbox on the line is still ticked, and look at the SIP trace to see the format the number arrives in — nine digits, international format or the trunk username.
5. Two numbers merged into one line. A line is matched on the last seven digits while the number has nine: 022 2100100 and 024 2100100 produce the same tail. Choose numbers with different tails, or use one number per venue.
6. Everything worked and then died after the server was rebuilt. In IP mode the provider sends calls to one specific address; when it changes, the trunk goes quiet silently, and with some suppliers the connection is blacklisted as well. Report the new address in advance.
7. They will not issue a number without documents. This is not the manager being difficult: identity registration is biometric, and without a corporate document pack no number will be issued.

The general table of symptoms and causes is in the overview, section “If calls do not go through”.

Frequently asked questions#

Can a Tanzanian number be connected to my own PBX at all?#

Yes. A TCRA licence is required from whoever provides the communications service, not from the subscriber: the venue buys a number and a trunk from a licensee and terminates them on its own PBX. You can check the supplier's licence in TCRA's public register.

Who should I approach first?#

If you have a Tanzanian legal entity, start with TTCL: it is the only carrier that names connecting a third-party IP-PBX as a product, and it also holds the 041 “enterprise numbers” and toll-free 0800 ranges. Ask SimbaNET and Liquid (Raha) in parallel — they run their own voice networks in the country. Without a local entity there is really one route: an international aggregator.

Why are there no real hosts and ports in the tables?#

Because no Tanzanian provider publishes them: the credentials come with the service order or connection email. The 5060 and UDP values in the tables reflect the usual behaviour of a carrier trunk; take the final ones from the provider's document and ask about everything missing from it using the list of questions.

Do I need a static IP?#

Yes, and your dedicated PBX already has one — the value is shown on the “Server” tab. In IP mode it is the only way the provider identifies you, and even with ordinary registration the address is usually requested up front for an allowlist.

Can I buy a Tanzanian number without a company in Tanzania?#

With local carriers, practically no: identity registration is biometric and requires corporate documents. That leaves international aggregators: didlogic advertises a national +255 and a toll-free 0800 for the country, while Telnyx, DIDWW and PBX.IM have storefronts whose inventory must be verified in the portal.

Will I be able to port my number to another provider?#

No. Mobile portability has been adopted in regulations but not launched in practice, and landline and VoIP numbers are not covered by it anyway: they are assigned to the holders of the ranges. Assume that changing carriers means changing the number.

How long does connection take?#

With an international aggregator, from a few hours to two days if address verification is required. With a local carrier, weeks: an offline application, a corporate document pack, a service order and testing.

Sources#

• TCRA — notification to the International Telecommunication Union: E.164 numbering plan for +255, 01.11.2024 (ranges 22–28, 4X/41, 6X/7X, 800, emergency numbers, regulator contacts) — https://www.itu.int/dms_pub/itu-t/oth/02/02/T02020000CB0008PDFF.pdf (10.09.2026)
• TCRA — List of Licenses & Certificates (register of licensees, downloadable) — https://www.tcra.go.tz/services/licenses (10.09.2026)
• TCRA — Featured services: Telecommunications — https://www.tcra.go.tz/services/featured/telecommunications (10.09.2026)
• TTCL — SIP Trunk Solution — https://www.ttcl.co.tz/sip-trunk (10.09.2026)
• TTCL — Enterprises Products (ISDN, toll-free 0800-11-XXXX) — https://www.ttcl.co.tz/enterprises-products (10.09.2026)
• SimbaNET — SimbaVoice (SimbaTrunk, local East African DIDs) — https://www.simbanet.net/simbavoice (10.09.2026)
• Liquid Intelligent Technologies — Unified Communications (SIP trunking) — https://liquid.tech/services/unified-communications/ (10.09.2026)
• Liquid Intelligent Technologies — Tanzania office (Raha Limited) — https://liquid.tech/local-offices/country/tanzania/ (10.09.2026)
• PBX.IM — SIP Trunking Provider in Tanzania (ranges 22, 24, 411) — https://www.pbx.im/services/sip-trunking-provider/tz (10.09.2026)
• Cloud One Tanzania — SIP Trunks (bringing your trunk into their PBX) — https://tanzania.cloudone.co/sip-trunk-solutions-tanzania (10.09.2026)
• Cloud One — Firewall Configuration for SIP Trunks (hosts, ports, allowlist) — https://www.cloudone.co/knowledge/article/113 (10.09.2026)
• Africa's Talking — country coverage (no voice in Tanzania) — https://help.africastalking.com/en/articles/2727792-which-countries-are-africa-s-talking-products-in (10.09.2026)
• Yas Tanzania — Business — https://yas.co.tz/business/why-tigo-business/ (10.09.2026)
• didlogic — virtual phone numbers for Tanzania (National +255, Toll-Free 0800) — https://didlogic.com/virtual-phone-numbers/tanzania/ (10.09.2026)
• Telnyx — Tanzania virtual phone numbers — https://telnyx.com/phone-numbers/tanzania (10.09.2026)
• DIDWW — SIP Trunking Services in Tanzania — https://www.didww.com/voice/global-sip-trunking/Tanzania (10.09.2026)
• Twilio — SIP Trunking pricing, Tanzania (termination only) — https://www.twilio.com/en-us/sip-trunking/pricing/tz (10.09.2026)
• CommPeak — SIP Trunking Providers in Tanzania — https://www.commpeak.com/services/sip-trunking/tanzania (10.09.2026)

Related pages#

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