Telephone Number (TN)

A Telephone Number (TN) is often used interchangeably with “Direct Inward Dialing (DID)”. Check out Direct Inward Dialing (DID) for more information.

Where We Talk About Telephone Numbers

• Phone Numbers
• Docs for Developers: Order Phone Numbers

Terms Related to TN

• Toll-Free Calling
• All-IP Voice Network
• Line Information Database (LIDB)