DID numbers for call centers and BPO teams

Updated 2026-09-30 · By the ZuteSIP team (ZuteSIP Inc.)

Short answer: ZuteSIP supplies real local, mobile and toll-free DID numbers in 181 countries for call centers. Each number comes with SIP credentials you register on VICIdial, 3CX, FreePBX or Asterisk, unlimited incoming calls, and 1,000 outgoing minutes per month. ZuteSIP provides the numbers; your dialer or PBX runs the campaigns and queues.

A BPO that answers for clients in several markets needs a believable local presence in each one. Here is how international DID numbers fit into a contact-center stack, and where the line sits between what ZuteSIP does and what your dialer does.

What a call center actually needs from a number provider

Most contact centers already own the hard parts: a dialer or PBX, agent seats, queue logic and reporting. What they lack is a supply of phone numbers in the countries their clients sell into. A DID (direct inward dialing) number is simply a real number that delivers calls to your system, and that is the piece ZuteSIP provides.

Each number is issued on a national phone network and arrives with its own SIP username and password. You add those credentials to your platform as a trunk or registration, and calls to the number land wherever your routing sends them: an inbound queue, a ring group or a single agent.

ZuteSIP is not a dialer engine. It does not run predictive, power or auto dialing, and it does not record calls. Those functions belong to the software you connect, such as VICIdial. Keeping the roles separate means you can change dialers without changing the numbers your clients' customers already know.

Which number type for which call center job

Availability of each type differs by country, so check the country page before promising a client a toll-free line. The guide on local, mobile and toll-free numbers covers the trade-offs in more depth.

Need	Suggested number type	Why
Inbound customer care for a client brand	Toll-free (where available)	Callers are not put off by call cost
Regional presence in a city or state	Local / geographic	Familiar area code raises answer and trust
Agents who also receive SMS codes or texts	Mobile	Mobile numbers handle SMS reliably in most markets
Call-backs and follow-ups	Local or mobile in the customer's country	Caller ID matches the market being served
Separate line per client account	One number per client	Clean reporting and easy handover if a contract ends

Capacity: what each number includes

Every number carries the same allowance: unlimited incoming calls and incoming SMS, plus 1,000 outgoing minutes and 500 outgoing SMS per month. For an inbound desk, the unlimited inbound side is what matters, because a busy week costs nothing extra.

Outbound is different. 1,000 minutes per number per month suits call-backs, confirmations and follow-ups, not a floor of agents dialing all day. Plan outbound volume per number honestly, and spread outbound work across numbers in the relevant markets rather than pushing one number hard.

The price is $1.80 per month, billed yearly ($21.60 per year), identical for every number type in every country, with no setup fee or contract. Payment is in USDT or USDC.

Connecting numbers to VICIdial, 3CX or FreePBX

Any SIP-compliant platform works. The server is sip.zutesipdialer.com on UDP/TCP 5060 or TLS 5061, with G.711 u-law and A-law codecs and digest authentication using the per-number credentials. DTMF uses RFC 2833 or SIP INFO, which matters if your IVR takes keypad input.

VICIdial: add a carrier entry with the registration and dialplan, then assign the DID to an inbound group.
3CX: add a generic SIP trunk and map the DID to a queue or ring group.
FreePBX or Asterisk: create a PJSIP trunk and an inbound route for the number.

Server:    sip.zutesipdialer.com
Port:      5060 (UDP/TCP) or 5061 (TLS)
Username:  <SIP_USERNAME>
Password:  <SIP_PASSWORD>
Caller ID: <YOUR_NUMBER>
Codecs:    PCMU, PCMA
DTMF:      RFC 2833

Setting up a new client campaign

Agree with the client which countries and number types they need.
Order the numbers and fund your wallet with USDT or USDC; most activate within minutes.
Copy each number's SIP username and password from the dashboard into your dialer or PBX.
Route each DID to the right queue or inbound group and set caller ID on outbound routes.
Place test calls from a mobile and a landline in the target country before go-live.
Configure call forwarding to a supervisor phone as a fallback if the platform goes down.

Team access and housekeeping

Inbound SMS and call logs appear in the dashboard, so a supervisor can see what reached a number even outside the dialer. Two-factor authentication and an audit log of sign-ins help when several team leads share an account.

Because numbers auto-renew from the wallet with a 7-day grace period, keep the wallet funded for client lines that must never lapse. If a number does not suit a campaign in its first week, the 7-day replacement guarantee gives you a free new number in the same country.

Emergency calls are not supported on ZuteSIP numbers, so agents should never rely on them for emergency services.

Included on every plan

Unlimited incoming SMS
Unlimited incoming calls
500 outgoing SMS per month
1,000 outgoing minutes per month
SIP credentials, call forwarding and web dialer
Keep your number as long as you want
Works with WhatsApp, Facebook, Google, Telegram and thousands more
7-day replacement guarantee — free new number if it doesn't work for you
7-day money-back guarantee if the number is unused

Numbers from $1.80 per month, billed yearly ($21.60 per year). Pay with USDT or USDC.

Frequently asked questions

Is ZuteSIP a predictive dialer?

No. ZuteSIP supplies real DID numbers and SIP credentials. Predictive, power or auto dialing is done by the software you connect, such as VICIdial.

How many outgoing minutes does each number include?

Each number includes 1,000 outgoing minutes and 500 outgoing SMS per month, with unlimited incoming calls and SMS.

Can one number ring several agents?

Yes, if your PBX or dialer distributes it. Register the number on 3CX, FreePBX, Asterisk or VICIdial and route it to a queue or ring group.

Do you record calls?

Call recording is not part of the ZuteSIP service. Many PBX and dialer platforms offer recording on their side.

Can we port our existing call center numbers?

Number porting is not offered. Teams usually add ZuteSIP numbers for new markets alongside their existing lines.

Which countries are available?

Numbers are available in 181 countries. Local, mobile and toll-free availability varies by country, so check each country page.