NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, all time — NPA 403
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2004-11-01 | 403-427 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Brooks | — |
| 2004-11-01 | 403-438 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Olds | — |
| 2004-10-13 | 403-697 | not yet reported which blocks → | Bell West Inc. | 2933 | Calgary | — |
| 2004-10-13 | 403-922 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2004-10-12 | 403-921 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2004-09-30 | 403-471 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Calgary | — |
| 2004-07-29 | 403-351 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Calgary | — |
| 2004-07-13 | 403-369 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2004-06-30 | 403-429 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Rocky Mountain House | — |
| 2004-06-30 | 403-635 | not yet reported which blocks → | TELUS Mobility | 8301 | Lethbridge | — |
| 2004-06-14 | 403-525 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| 2004-05-28 | 403-831 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2004-05-05 | 403-456 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Calgary | — |
| 2004-04-22 | 403-356 | not yet reported which blocks → | TELUS | 8084 | Red Deer | — |
| 2004-04-22 | 403-359 | not yet reported which blocks → | TELUS | 8084 | Lethbridge | — |
| 2004-04-13 | 403-598 | not yet reported which blocks → | Bell Mobility | 6574 | Red Deer | — |
| 2004-04-13 | 403-928 | not yet reported which blocks → | Bell Mobility | 6574 | Medicine Hat | — |
| 2004-03-29 | 403-847 | not yet reported which blocks → | TELUS | 8084 | Rocky Mountain House | — |
| 2004-03-22 | 403-795 | not yet reported which blocks → | Bell Mobility | 6574 | Lethbridge | — |
| 2004-03-18 | 403-451 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Calgary | — |
| 2004-02-27 | 403-836 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2004-02-18 | 403-554 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2004-02-18 | 403-837 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2004-01-12 | 403-689 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Calgary | — |
| 2003-11-07 | 403-576 | not yet reported which blocks → | TELUS | 8084 | Veteran | — |
| 2003-10-29 | 403-968 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2003-10-23 | 403-361 | not yet reported which blocks → | TELUS | 8084 | Strathmore | — |
| 2003-10-23 | 403-636 | not yet reported which blocks → | TELUS | 8084 | Sundre | — |
| 2003-09-25 | 403-969 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2003-09-23 | 403-421 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Warner | — |
| 2003-09-23 | 403-505 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| 2003-09-04 | 403-355 | not yet reported which blocks → | Bell West Inc. | 2933 | Calgary | — |
| 2003-09-04 | 403-835 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2003-09-04 | 403-866 | not yet reported which blocks → | TELUS Mobility | 8301 | Medicine Hat | — |
| 2003-09-04 | 403-894 | not yet reported which blocks → | TELUS Mobility | 8301 | Lethbridge | — |
| 2003-05-22 | 403-445 | not yet reported which blocks → | TELUS | 8084 | Three Hills | — |
| 2003-05-22 | 403-486 | not yet reported which blocks → | TELUS | 8084 | Vulcan | — |
| 2003-04-16 | 403-332 | not yet reported which blocks → | TELUS | 8084 | Lethbridge | — |
| 2003-04-16 | 403-945 | not yet reported which blocks → | TELUS | 8084 | Airdrie | — |
| 2003-04-07 | 403-334 | not yet reported which blocks → | TELUS Mobility | 8301 | Drumheller | — |
| 2003-04-07 | 403-336 | not yet reported which blocks → | TELUS Mobility | 8301 | High River | — |
| 2003-04-03 | 403-339 | not yet reported which blocks → | TELUS Mobility | 8301 | Pincher Creek | — |
| 2003-04-03 | 403-493 | not yet reported which blocks → | TELUS Mobility | 8301 | Canmore | — |
| 2003-04-03 | 403-583 | not yet reported which blocks → | TELUS Mobility | 8301 | Crowsnest Pass | — |
| 2003-03-19 | 403-325 | not yet reported which blocks → | TELUS Mobility | 8301 | Strathmore | — |
| 2003-01-21 | 403-987 | not yet reported which blocks → | Globalstar | 6996 | Calgary | — |
| 2002-12-19 | 403-829 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2002-10-03 | 403-827 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2002-10-01 | 403-771 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2002-10-01 | 403-990 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.