Implementation Guidelines for Telephone Number Identification

We provide automated access to our Telephone Number Identification (TNI) service using the HTTP protocol. This page describes the URLs and input and output fields for the TNI service.

While you can write your own code to access the HTTP service, we recommend using our PHP, Perl, Java, ASP and .NET APIs.


Secure (HTTPS)

  • Server:

Regular (HTTP)

  • Server:

A sample query is listed below:

Any plus sign '+' must be URL escaped. That is you should replace '+' with '%2B' in PHONE_NUMBER.


Field Description


Field Format Description