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 |
|---|---|---|---|---|---|---|
| 2023-10-02 | 753-207 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St. Isidore | — |
| 2023-10-02 | 753-563 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Regis | — |
| 2023-10-02 | 753-680 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chesterville | — |
| 2023-10-02 | 753-779 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Crysler | — |
| 2023-10-02 | 753-961 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Navan | — |
| 2023-08-01 | 753-206 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bourget | — |
| 2023-08-01 | 753-312 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Manotick | — |
| 2023-08-01 | 753-528 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Metcalfe | — |
| 2023-07-28 | 753-689 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Martintown | — |
| 2023-07-28 | 753-801 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Maxville | — |
| 2023-07-28 | 753-922 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St. Eugene | — |
| 2023-06-23 | 753-762 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | L'Orignal | — |
| 2023-06-23 | 753-855 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Long Sault | — |
| 2023-06-22 | 753-339 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ingleside | — |
| 2023-05-19 | 753-571 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Plevna | — |
| 2023-05-18 | 753-219 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Marmora | — |
| 2023-05-18 | 753-438 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Northbrook | — |
| 2023-05-18 | 753-896 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wellington | — |
| 2023-03-27 | 753-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Avonmore | — |
| 2023-03-27 | 753-669 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Finch | — |
| 2023-03-27 | 753-901 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Glen Robertson | — |
| 2023-02-15 | 753-226 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Coe Hill | — |
| 2023-02-15 | 753-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Denbigh | — |
| 2023-02-15 | 753-832 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Gilmour | — |
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.