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Emergency Service Routing Digit (ESRD)

ESRD Assignment Guideline

The current CRTC-approved Canadian Emergency Service Routing Digit (ESRD) Block Assignment Guideline is available from the CRTC website.


ESRD Forms

The ESRD Application, Reservation, Information Change or Return form (Part 1) and Confirmation of ESRD Block(s) in Use (Part 3) forms are located in Appendix A of the Emergency Service Routing Digit (ESRD) Block Assignment Guideline, which is located on the CRTC website.

Those meeting the requirements to submit forms should extract the forms from the guideline for submission to the ESRD Block Administrator and submit them to


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