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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2025-11-17 | 873-572 | not yet reported which blocks → | Cooptel | 818D | Asbestos | — |
| 2023-07-07 | 873-574 | not yet reported which blocks → | Cooptel | 818D | St-Donat-de-Montcalm | — |
| 2023-02-23 | 873-309 | not yet reported which blocks → | Cooptel | 818D | Tingwick | — |
| 2022-02-18 | 873-832 | not yet reported which blocks → | Cooptel | 818D | Weedon | — |
| 2021-11-26 | 873-831 | not yet reported which blocks → | Cooptel | 818D | Ham-Nord | — |
| 2021-09-24 | 873-619 | not yet reported which blocks → | Cooptel | 818D | St-Cyrille | — |
| 2021-06-29 | 873-830 | not yet reported which blocks → | Cooptel | 818D | Danville | — |
| 2019-11-06 | 873-629 | not yet reported which blocks → | Cooptel | 818D | St-Germain-de-Grantham | — |
| 2019-06-18 | 873-628 | not yet reported which blocks → | Cooptel | 818D | Drummondville | — |
| 2019-03-06 | 873-625 | not yet reported which blocks → | Cooptel | 818D | L'Avenir | — |
| 2019-03-06 | 873-626 | not yet reported which blocks → | Cooptel | 818D | Wickham | — |
| 2019-03-06 | 873-627 | not yet reported which blocks → | Cooptel | 818D | St-Guillaume | — |
| 2015-05-13 | 873-827 | not yet reported which blocks → | Cooptel | 818D | East Angus | — |
| 2015-03-02 | 873-826 | not yet reported which blocks → | Cooptel | 818D | Bromptonville | — |
| 2013-05-08 | 873-825 | not yet reported which blocks → | Cooptel | 818D | Cookshire | — |
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.