MSAG (Master Street Address Guide)

What is MSAG?

A Master Street Address Guide (MSAG) is a directory that maps out every valid street address within a geographical area. These allow for proper 911 call routing to any address range.

State and municipal authorities are responsible for updating the MSAG Directory and making it available for use. For any specific MSAG questions, contact your particular state or municipal authority.

How is Bandwidth involved with MSAG?

Bandwidth utilizes MSAG when it comes to our 911 access services. We start with your submitted civic/postal addresses, which we then geo-code to assign an X/Y coordinate for each record, confirming successful validation. We then store the geo-coded address in the MSAG-compliant format for the jurisdiction in question.

Each telephone number’s address is then immediately available to respond to PSAP queries. Bandwidth subscribes to the most current geo-code databases available, in addition to working with all of the 911 authorities to obtain MSAG and GIS files. Our dedicated support team in turn ensures timely updates to the validation engine. With us, the entire process takes minutes instead of days or potentially weeks from competing providers.