NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2023-10-03 | 683-202 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Biscotasing | — |
| 2023-10-03 | 683-318 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cartier | — |
| 2023-10-03 | 683-425 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Coniston | — |
| 2023-10-03 | 683-629 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dubreuilville | — |
| 2023-07-28 | 683-488 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Alban | — |
| 2023-07-28 | 683-757 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Capreol | — |
| 2023-07-28 | 683-776 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Severn Bridge | — |
| 2023-07-28 | 683-832 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Killarney | — |
| 2023-07-28 | 683-995 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Massey | — |
| 2023-07-27 | 683-216 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Port McNicoll | — |
| 2023-07-27 | 683-351 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Sebright | — |
| 2023-06-20 | 683-225 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lafontaine | — |
| 2023-06-20 | 683-459 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lefroy | — |
| 2023-05-18 | 683-302 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Elmvale | — |
| 2023-05-18 | 683-521 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Waubaushene | — |
| 2023-05-18 | 683-609 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Burleigh Falls | — |
| 2023-05-18 | 683-868 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Nephton | — |
| 2023-03-27 | 683-707 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Pefferlaw | — |
| 2023-03-27 | 683-929 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Udora | — |
| 2023-03-22 | 683-850 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bethany | — |
| 2023-03-21 | 683-205 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Apsley | — |
| 2023-03-21 | 683-412 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bailieboro | — |
| 2023-02-15 | 683-201 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bluewater | — |
| 2023-02-15 | 683-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Christian Island | — |
| 2023-02-15 | 683-559 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cookstown | — |
| 2023-02-15 | 683-780 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Creemore | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.