Brazil voice guidelines
Voice calling guidelines for Brazil (BR), covering reachability, caller ID formats, DTMF support, and emergency services.
Locale overview
| Field | Value |
|---|---|
| Country | Brazil |
| ISO code | BR |
| Region | South America |
| Dialing code | +55 |
Reachability
| Call type | Inbound | Outbound | Notes |
|---|---|---|---|
| Domestic | Yes | Yes | |
| International | Yes | Yes | |
| Toll-free | Yes | No | Toll-free outbound origination is not supported |
Outbound calls are permitted from international calling numbers and Brazil phone numbers owned by the originating carrier account. Outbound origination is not permitted from non-account-owned Brazilian numbers or Brazilian toll-free numbers.
Caller ID
| Call type | Format | Delivery guarantee |
|---|---|---|
| Domestic inbound | +E.164 | Guaranteed |
| Domestic outbound | Local format | Not guaranteed |
| International inbound | +E.164 | Not guaranteed |
| International outbound | +E.164 | Not guaranteed |
| Toll-free inbound | +E.164 | Guaranteed |
DTMF support
DTMF tones use RFC 2833 format and are supported for both inbound and outbound calls.
Emergency services
Outbound calls to emergency services numbers (such as 190 or 192) are not supported. Do not rely on this service for emergency calling in Brazil.
Special requirements
Brazilian telecommunications regulations (ANATEL) require that customers classified as telemarketers originate calls using 0303 phone numbers. This requirement took effect on June 8, 2022. If your use case involves telemarketing or outbound sales campaigns, confirm whether this classification applies to your organization and provision the appropriate number type accordingly.
Carrier call filtering
ANATEL decision 82/2026 authorizes Brazilian carriers to filter or block calls that match patterns associated with mass, abusive, or unsolicited calling. This filtering happens on the carrier’s network, so legitimate business calls can be affected if a carrier’s system flags the originating number.
If your calls to Brazil are being filtered, a business with a Brazilian company registration number (CNPJ) can request that its phone numbers be reviewed or whitelisted directly with the carrier. Submission channels vary by carrier:
- Vivo: Submit a request through the Vivo anti-spam portal.
- Claro: Submit a request through the Claro anti-spam contestation form.
- TIM: Submit a request through TIM Empresas support or the TIM Anti-Spam page.
Carriers are required to review whitelist requests within 10 business days. Confirm the current submission process and required documentation directly with each carrier, as portals and requirements may change.
Compliance note
These guidelines summarize carrier requirements at the time of publication and do not constitute legal counsel. Verify that your implementation complies with all applicable telecommunications regulations in Brazil.