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When you make an outbound call, you want your customers to know it’s you. This is where CNAM (Caller ID Name) comes in.

While your caller ID Number displays your phone number, CNAM allows you to display a text-based name (such as your business name) alongside it. However, the North American phone system relies on a complex web of decentralized databases and signaling protocols to make this happen.

Here is everything you need to know about how US and Canadian CNAM works, what it can do for your business, and the technical limitations you need to be aware of.

How CNAM Works: A Tale of Two Countries

The United States and Canada handle Caller ID Name in fundamentally different ways. Understanding this difference is key to understanding why a name might show up in one country but not the other.

In the United States: The "Database Dip"

In the US, CNAM information is not transmitted alongside the phone call. Instead, it requires a database lookup:

1. The Registration: Talkdesk submits your 15-character business name for CNAM registration through its carrier partners.
2. The "Dip": When you call a customer, their specific phone carrier (the "terminating" carrier) receives the incoming phone number. The receiving carrier may perform a lookup ("dip") into a CNAM database to retrieve the name associated with your number.
3. The Display: If the receiving carrier performs a lookup and retrieves a valid CNAM record, it may display your business name to the recipient.

In Canada: The "SIP Signaling"

Unlike the US, Canada generally does not rely on a centralized CNAM database lookup. Instead, many Canadian carriers support Caller ID Name delivery using SIP signaling, although implementation varies across carriers and networks.

1. The Transmission: For supported Canadian calls, the originating carrier includes your 15-character Caller ID Name within the SIP signaling associated with the call.
2. The Display: When the call reaches the Canadian terminating carrier, that carrier may read the Caller ID Name from the incoming signaling and display it to the recipient. Because support varies by carrier, network, and call path, the Caller ID Name display cannot be guaranteed for every call.

The Possibilities: Why Use CNAM?

When implemented correctly, CNAM is a powerful tool for your outbound contact center across North America:

• Increases Answer Rates: Customers are highly hesitant to answer calls from unknown numbers. Displaying a familiar business name gives them the confidence to pick up.
• Builds Trust and Credibility: A recognized Caller ID name assures the recipient that the call is legitimate and not a spam robocall.
• Delivers a Professional Experience: It provides a personalized, on-brand touch before the customer even answers the phone.

The Limitations: Why CNAM Isn't Guaranteed

It is crucial to understand that Caller ID Name delivery is never 100% guaranteed in either country. Because the North American telecom network is a mix of different carriers, borders, and technologies, you may run into the following limitations:

1. The 15-Character Limit (US & Canada)

• Industry standards restrict CNAM to a maximum of 15 alphanumeric characters (including spaces).
• The name typically displays in all capital letters.
• It cannot contain special characters and must reflect your actual business or individual name.

2. Cross-Border Signaling Limitations (Canada)

• Because Canadian Caller ID Name delivery often relies on the name being carried within the call's SIP signaling, it depends on that information being preserved throughout the call path.
• If a call from a US Talkdesk number passes through multiple carrier networks or legacy interconnection points before reaching Canada, the Caller ID Name signaling may not be preserved. If the call arrives at the Canadian terminating carrier without this signaling information, no Caller ID Name may be displayed.

3. The Receiving Carrier Controls the Display (US)

• Talkdesk cannot force a US customer's phone to display your CNAM.
• It is entirely up to the receiving carrier to perform the CNAM "dip" (lookup).
• Some carriers charge their subscribers a fee for this feature, and if the customer hasn't enabled it, they will only see your phone number.
• Even when a carrier receives valid CNAM information, it may choose to display its own caller identification data instead.

4. Outdated Carrier Databases (US)

• There is no single, official CNAM database in the US. Carriers use various third-party databases.
• To save money, carriers may use cached records or periodically synchronized databases rather than performing a live lookup for every call.
• If a US carrier is using an outdated database, it might display an old name previously associated with that number. It can take weeks for new CNAM updates to propagate across all carrier databases.

5. Cell Phones vs. Landlines (US & Canada)

• CNAM was originally designed for traditional landline networks. Today, many mobile carriers supplement or replace traditional CNAM with their own caller identification services, proprietary databases, or third-party platforms (such as Hiya, Truecaller, or Google). As a result, the caller name displayed on a mobile device may come from sources other than your official CNAM registration and can differ from the registered Caller ID Name.

6. Toll-Free Number Restrictions (US & Canada)

• Toll-free numbers use a separate CNAM registration process from local numbers. Support for toll-free CNAM varies by carrier, and some providers may display only the phone number or a generic label instead of the registered name.

CNAM vs. Branded Calling vs. SHAKEN/STIR 

To maximize your outbound success, it helps to know the difference between these three distinct technologies:

• CNAM: A legacy database-lookup or signaling system that provides up to 15 characters of text on supported devices.
• Branded Caller ID: A modern, premium service that pushes a richer brand identity directly to cell phones. This can include a longer business name (up to 32 characters on some carriers), a custom logo, and even a "Call Reason" (e.g., "Delivery Update").
• SHAKEN/STIR: This is a security protocol, not a branding tool. It authenticates your right to use a phone number, helping carriers verify that the calling number has been authenticated. While this can improve trust and reduce the likelihood of spam labeling, SHAKEN/STIR does not guarantee that calls will be exempt from spam filtering or blocking.

How to Set Up CNAM in Talkdesk

Talkdesk supports applying a business name to both United States and Canadian phone numbers. We coordinate CNAM registration through our carrier partners for supported US numbers and configure Caller ID Name delivery for supported Canadian numbers.

To request a CNAM update:

• Determine your 15-character business name.
• Submit a request directly to Talkdesk Support with the phone number(s) and your requested name.
• Our team will process the update and notify you once the configuration is complete.