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
Feb 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 |
|---|---|---|---|---|---|---|
| 2000-09-14 | 403-852 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2000-09-13 | 403-875 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2000-08-15 | 403-877 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| 2000-08-15 | 403-878 | not yet reported which blocks → | TELUS Mobility | 8301 | Medicine Hat | — |
| 2000-08-15 | 403-892 | not yet reported which blocks → | TELUS Mobility | 8301 | Lethbridge | — |
| 2000-08-02 | 403-512 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2000-06-01 | 403-321 | not yet reported which blocks → | TELUS Mobility | 8301 | Drumheller | — |
| 2000-06-01 | 403-322 | not yet reported which blocks → | TELUS Mobility | 8301 | Rocky Mountain House | — |
| 2000-06-01 | 403-323 | not yet reported which blocks → | TELUS Mobility | 8301 | Stettler | — |
| 2000-05-12 | 403-510 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2000-02-03 | 403-312 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 1999-10-22 | 403-874 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 1999-09-27 | 403-809 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-318 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| — | 403-370 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-371 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-506 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| — | 403-519 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-540 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-588 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| — | 403-620 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-633 | not yet reported which blocks → | TELUS Mobility | 8301 | Brooks | — |
| — | 403-634 | not yet reported which blocks → | TELUS Mobility | 8301 | Lethbridge | — |
| — | 403-650 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-651 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-660 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-701 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-703 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-803 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-804 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-807 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-813 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-815 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-816 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-818 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-819 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-850 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-860 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-861 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-862 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-863 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| — | 403-952 | not yet reported which blocks → | TELUS Mobility | 8301 | Medicine Hat | — |
| — | 403-994 | not yet reported which blocks → | TELUS Mobility | 8301 | Olds | — |
| — | 403-996 | not yet reported which blocks → | TELUS Mobility | 8301 | Banff | — |
| — | 403-999 | 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.