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 873
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 |
|---|---|---|---|---|---|---|
| 2022-07-07 | 873-286 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lyster | — |
| 2022-06-30 | 873-287 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Donat-de-Montcalm | — |
| 2022-04-04 | 873-470 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Grenville | — |
| 2022-01-17 | 873-260 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bouchette | — |
| 2022-01-17 | 873-529 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Gracefield | — |
| 2022-01-17 | 873-801 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Grand-Remous | — |
| 2021-05-04 | 873-678 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Buckingham | — |
| 2021-05-04 | 873-679 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Luskville | — |
| 2021-05-04 | 873-680 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Perkins | — |
| 2020-08-07 | 873-263 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Boniface-de-Shawinigan | — |
| 2020-08-07 | 873-264 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Mathieu | — |
| 2020-08-06 | 873-261 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Shawinigan | — |
| 2020-08-06 | 873-262 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Grand'Mere | — |
| 2020-07-23 | 873-258 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Guillaume | — |
| 2020-07-23 | 873-259 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wickham | — |
| 2020-05-26 | 873-891 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Louiseville | — |
| 2020-05-26 | 873-892 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Laurierville | — |
| 2020-05-26 | 873-893 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Plessisville | — |
| 2020-05-26 | 873-897 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Asbestos | — |
| 2020-05-26 | 873-898 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Danville | — |
| 2020-05-21 | 873-879 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chelsea | — |
| 2017-06-06 | 873-471 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lebel-sur-Quevillon | — |
| 2017-02-09 | 873-472 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ville-Marie | — |
| 2016-10-28 | 873-482 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Minerve | — |
| 2016-10-28 | 873-483 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | L'Annonciation | — |
| 2016-09-29 | 873-481 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Arundel | — |
| 2016-08-25 | 873-480 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Labelle | — |
| 2016-08-18 | 873-473 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Amos | — |
| 2016-08-18 | 873-474 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Sarre | — |
| 2016-08-17 | 873-479 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Jovite | — |
| 2016-08-01 | 873-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ste-Agathe | — |
| 2016-07-19 | 873-475 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rouyn-Noranda | — |
| 2016-06-06 | 873-476 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Val-D'Or | — |
| 2015-10-06 | 873-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Victoriaville | — |
| 2012-10-26 | 873-274 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Minerve | — |
| 2012-10-26 | 873-275 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Arundel | — |
| 2012-10-26 | 873-276 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Val David | — |
| 2012-10-26 | 873-277 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Donat-de-Montcalm | — |
| 2012-10-26 | 873-278 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Adolphe-D'Howard | — |
| 2012-10-26 | 873-279 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Jovite | — |
| 2012-10-26 | 873-280 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Faustin | — |
| 2012-10-26 | 873-281 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ste-Agathe | — |
| 2012-10-26 | 873-282 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Nominingue | — |
| 2012-10-26 | 873-283 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | L'Annonciation | — |
| 2012-10-26 | 873-284 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Labelle | — |
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.