testnumber.org

Test a Phone Number's Interoperability, Caller Id, Reputation, and STIR/SHAKEN Attestation Level

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Test PSTN and VOIP Calls

We create tools to make it easy test and troubleshoot phone calls.

Current Features

• Determines the calling number
• Determines the STIR/SHAKEN attestation level
• Determines if the calling number is flagged as a robocaller according to Scout
• Determines if DTMF is working properly

Usage

Simply call one of the Telephone Numbers or SIP addresses listed below. Listen on the line for information about your call and calling number.

Test PSTN Numbers

Note: different numbers may return different results

• +1-737-727-3232
• +1-260-270-1982
• +1-959-335-1959

Test SIP Addresses

• sip:test1@sip.testnumber.org:5060

How It Works

The Phone Numbers and SIP addresses at testnumber.org map to Twilio functions which use Scout to detect Robocalls.

SHAKEN/STIR Response Reference

Currently the SHAKEN/STIR response is derived from Twilio’s implementation which is documented here

Tutorials

• Learn how we access the calling number in Twilio call flow here
• Learn to use Scout to find the SPAM Risk Rating of an incoming Twilio call here