Latin America

SIP Trunk Brazil — +55 Termination & DID Numbers

Brazil is large, regulated and price-sensitive: domestic long-distance dialling still uses a two-digit carrier selection code, and ANATEL requires active telemarketing to mobiles to come from the dedicated 0303 prefix. Getting those details right is the difference between calls that connect and calls that are flagged.

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Overview

Routing calls to Brazil

Traffic to Brazil leaves our SBCs on more than one upstream carrier per prefix. If a leg toward São Paulo or Rio de Janeiro starts returning 503s or long post-dial delay, the next attempt goes to another carrier automatically. Calls to Brasília, Belo Horizonte, Salvador and Curitiba follow the same failover logic.

Numbering in Brazil is managed by ANATEL. We terminate to geographic, mobile and toll-free ranges and price each one separately on the rate sheet. Inside the country, numbers are dialled with a 0 + carrier code trunk prefix. Strip it before you send the call, and send 55 followed by the national number.

Outbound termination to Brazil starts as soon as your balance is topped up. Local DIDs are different: ANATEL rules usually require address and identity documents, which our team collects and checks before activation.

What you get

What you get in Brazil

One account and one balance, with the same SBCs for termination and inbound numbers.

CLI route tier
Caller ID delivered end to end on +55 calls. Use it for sales, support and any traffic where answer rates matter.
Non-CLI route tier
A lower-cost tier where caller ID delivery is not guaranteed. Suitable for internal or transactional traffic that does not depend on the CLI.
Number types
Geographic, Mobile, Toll-free. DID availability varies by range and city.
Codecs
G.711a/u and G.729 on every route, G.722 and Opus where the far end supports them. T.38 for fax.
Channels on demand
Concurrent call limits are set per account and raised as your traffic grows. No fixed channel bundles.
Multi-carrier failover
Every +55 prefix is mapped to more than one carrier. Failed attempts move to the next one automatically.

Number formats

How to dial Brazil from your PBX

Send E.164 digits. The sample number below shows the format only.

Brazil number formats
Format	Example	Notes
International (E.164)	+55 11 3123 4567	How the number is written and stored.
Sent from your PBX	551131234567	E.164 digits with no plus, prefixed by your tech prefix if your account uses one.
With 00 exit code	00 55 11 3123 4567	Accepted on the trunk. We normalise it to E.164.
National format	0 + carrier code + 11 3123 4567	Dialled inside Brazil. Strip the trunk prefix before sending.

Compliance

Brazil rules to know

What applies before your first call or your first DID goes live.

Compliance box

Regulator: ANATEL
Caller ID: A valid CLI that you are entitled to use is required on CLI routes. Spoofed or unallocated numbers are blocked.
DID KYC: Usually required
Note: Active telemarketing to mobiles must use the 0303 prefix under ANATEL rules.

Rules change — our team confirms current requirements before activation.

Use cases

Who uses Brazil routes

01
Portuguese-language sales and retention teams calling São Paulo and Rio mobiles
02
0800 toll-free customer care for e-commerce and fintech brands
03
Inbound DIDs for Brazilian subsidiaries running a central PBX abroad

Setup

Start calling Brazil in 3 steps

01
Top up $200
Open a prepaid account and add balance by USDT (TRC20), BTC or card.
02
Add your trunk
Whitelist your PBX IP or create digest credentials, then point your outbound route at our SBC.
03
Dial +55
Send 55 + national number in E.164 and check the CDR for your first test call.

PBX guides:Asterisk setup guide 3CX setup guide All guides

Further reading: What Is a SIP Trunk? A Plain-English Guide for 2026

FAQ

Brazil SIP trunk questions

What is the 0303 prefix?

ANATEL requires companies doing active telemarketing to use numbers in the 0303 range so consumers can identify and block them. Confirm with sales before sending telemarketing traffic.