CO Code Status

CO code status data is published to the www.cnac.ca website from the CNAS master database every night from Monday through Friday.

CO Code status data is provide here to assist carriers in determining which codes are available for applications and also for the general public to know where assigned codes are located. Networking and routing information can be found in the Local Exchange Routing Guide (LERG) <ref1> <ref2>

Jeopardy Contingency Plan

Access the CO code (NXX) status data for a specific NPA by clicking on the links below.
The data is available in both a friendly HTML Format (on the left) and in CSV Files (on the right). See below for notes related to a given NPA.

HTML Format 204 226 236 249 250 289 306 343  354* 365 367  368* 403 416 418  428* 431 437 438 450 474 506 514 519 548 579 581 587 604 613 639 647 672 705 709 742 778 780 782 807 819 825 867 873  879* 902 905

(You may find a higher resolution NPA map in the Area Code Maps section)

CSV Files 204 226 236 249 250 289 306 343  354* 365 367  368* 403 416 418  428* 431 437 438 450 474 506 514 519 548 579 581 587 604 613 639 647 672 705 709 742 778 780 782 807 819 825 867 873  879* 902 905

The CO code status for all NPAs are available in this compressed CSV file (requires a ZIP decompression utility).

For information regarding regulated and non-regulated exchanges, please see this link on the CRTC website: http://www.crtc.gc.ca/eng/publications/forbornelist.htm

* Notes