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
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 403-517 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-519 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-520 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-521 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-522 | not yet reported which blocks → | TELUS | 8084 | Lake Louise | — |
| — | 403-526 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-527 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-528 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-529 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-530 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-531 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-533 | not yet reported which blocks → | TELUS | 8084 | Rockyford | — |
| — | 403-534 | not yet reported which blocks → | TELUS | 8084 | Arrowwood | — |
| — | 403-540 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-541 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-543 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-544 | not yet reported which blocks → | TELUS | 8084 | Ralston | — |
| — | 403-545 | not yet reported which blocks → | TELUS | 8084 | Bow Island | — |
| — | 403-546 | not yet reported which blocks → | TELUS | 8084 | Acme | — |
| — | 403-547 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-548 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-549 | not yet reported which blocks → | TELUS | 8084 | Stavely | — |
| — | 403-552 | not yet reported which blocks → | TELUS | 8084 | Altario | — |
| — | 403-553 | not yet reported which blocks → | TELUS | 8084 | Fort Macleod | — |
| — | 403-556 | not yet reported which blocks → | TELUS | 8084 | Olds | — |
| — | 403-558 | not yet reported which blocks → | TELUS | 8084 | Longview | — |
| — | 403-562 | not yet reported which blocks → | TELUS | 8084 | Crowsnest Pass | — |
| — | 403-563 | not yet reported which blocks → | TELUS | 8084 | Crowsnest Pass | — |
| — | 403-564 | not yet reported which blocks → | TELUS | 8084 | Crowsnest Pass | — |
| — | 403-565 | not yet reported which blocks → | TELUS | 8084 | Empress | — |
| — | 403-566 | not yet reported which blocks → | TELUS | 8084 | Cessford | — |
| — | 403-569 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-570 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-571 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-572 | not yet reported which blocks → | TELUS | 8084 | Carbon | — |
| — | 403-574 | not yet reported which blocks → | TELUS | 8084 | Gadsby | — |
| — | 403-575 | not yet reported which blocks → | TELUS | 8084 | Veteran | — |
| — | 403-577 | not yet reported which blocks → | TELUS | 8084 | Consort | — |
| — | 403-578 | not yet reported which blocks → | TELUS | 8084 | Coronation | — |
| — | 403-579 | not yet reported which blocks → | TELUS | 8084 | Byemoor | — |
| — | 403-580 | not yet reported which blocks → | TELUS | 8084 | Medicine Hat | — |
| — | 403-588 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| — | 403-590 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-591 | not yet reported which blocks → | TELUS | 8084 | Kananaskis | — |
| — | 403-599 | not yet reported which blocks → | TELUS | 8084 | Milo | — |
| — | 403-601 | not yet reported which blocks → | TELUS | 8084 | High River | — |
| — | 403-609 | not yet reported which blocks → | TELUS | 8084 | Canmore | — |
| — | 403-620 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-625 | not yet reported which blocks → | TELUS | 8084 | Claresholm | — |
| — | 403-626 | not yet reported which blocks → | TELUS | 8084 | Glenwood | — |
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.