Understanding USA voice number features
US voice numbers on Infobip support two additional features: Calling Name Delivery Service (CNAM) and Emergency Calling Services (E.911). These are required for outbound caller ID display and compliance with emergency calling regulations.
Prerequisites
- Active Infobip account with Voice channel enabled
- At least one US voice number configured (Virtual long number or 10DLC)
- For E.911: Valid physical address (not a P.O. box) for emergency routing
Calling name delivery service (CNAM)
Calling Name Delivery Service (CNAM) is available for Infobip USA voice numbers. It supports two modes.
| Mode | Direction | What it does | Additional charge |
|---|---|---|---|
| CNAM Storage | Outbound | Shows your business name to the people you call | No |
| CNAM Delivery | Inbound | Shows the caller's name when someone calls your number | Yes |
CNAM Storage [#cnam-storage-calling-name-delivery-service-cnam]
CNAM Storage lets you associate a calling name with your Infobip voice number. When you make outbound calls, recipients see your business name instead of a phone number. For example, they see "Customer Support Team" instead of "+1-555-0123".
Requirements for CNAM display:
- The recipient's phone and network must support CNAM (Caller ID with Name)
- The recipient's carrier must have CNAM enabled
- Some carriers charge extra for CNAM or include it in specific plans
CNAM Delivery [#cnam-delivery-calling-name-delivery-service-cnam]
CNAM Delivery lets you see the caller's name when someone calls your Infobip voice number (additional charge applies). CNAM data is available through the following integrations.
| Integration | Where CNAM appears |
|---|---|
| Calls API | callReceived event |
| SIP trunks forwarded through Call routing | From header as CNAM <sip:from_phone_number@1.2.3.4:5060> |
Emergency Calling Services (E.911)
Emergency Calling Services (E.911) lets you associate a verified physical address with your Infobip USA voice number. When a call reaches 911 from a properly configured number, it routes to the closest PSAP (Public Safety Answering Point) based on your registered address.
A mandatory penalty fee applies for 911 calls from USA numbers not configured with E.911. Configure E.911 with a valid physical address (not a P.O. box) and complete address verification to avoid penalties.
Configure CNAM and E.911
You can configure CNAM Storage, CNAM Delivery, and E.911 using the web interface or the Numbers API.
- Go to Channels and Numbers > Numbers.
- Select your US voice number.
- Select the Voice tab.
- In the Country specific configuration section, activate CNAM or E.911.
For CNAM: A window prompts you to choose CNAM delivery or storage. For storage, define the calling name your customers see.
For E.911: Enter your physical address for emergency routing. Complete address verification to ensure 911 calls route correctly.
| Feature | Endpoint | Operations |
|---|---|---|
| CNAM | /numbers/2/numbers/{numberKey}/voice/cnam | GET, create, update, delete |
| Emergency service address | /numbers/2/numbers/{numberKey}/voice/emergency-service | Validate and manage |
Learn moreNumbers API reference. Complete documentation for all CNAM and E.911 voice setup endpoints.
Numbers API reference
Complete API documentation for CNAM and E.911 voice setup.
Understanding 10DLC
10DLC number details and voice capabilities.
USA SMS compliance requirements
CTIA standards and carrier compliance requirements.