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
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 403-257 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-258 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-259 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-260 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-261 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-262 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-263 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-264 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-265 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-266 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-267 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-268 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-269 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-270 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-271 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-272 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-273 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-274 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-275 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-276 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-277 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-278 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-279 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-280 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-281 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-282 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-283 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-284 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-285 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-286 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-287 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-288 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-289 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-290 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-291 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-292 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-293 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-294 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-295 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-296 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-297 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-298 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-299 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-301 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-302 | not yet reported which blocks → | TELUS | 8084 | Red Deer | — |
| — | 403-303 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| — | 403-304 | not yet reported which blocks → | TELUS | 8084 | Red Deer | — |
| — | 403-308 | not yet reported which blocks → | TELUS | 8084 | Lethbridge | — |
| — | 403-309 | not yet reported which blocks → | TELUS | 8084 | Red Deer | — |
| — | 403-310 | not yet reported which blocks → | TELUS | 8084 | 7 Digit Service | — |
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.