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 |
|---|---|---|---|---|---|---|
| 2022-11-15 | 474-231 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Osler | — |
| 2022-11-15 | 474-232 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Outlook | — |
| 2022-11-15 | 474-352 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lucky Lake | — |
| 2022-11-15 | 474-353 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Meacham | — |
| 2022-11-15 | 474-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Langham | — |
| 2022-11-15 | 474-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lanigan | — |
| 2022-11-15 | 474-527 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Perdue | — |
| 2022-11-15 | 474-528 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Prudhomme | — |
| 2022-11-15 | 474-529 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Radisson | — |
| 2022-11-15 | 474-664 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rosthern | — |
| 2022-11-15 | 474-665 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Vonda | — |
| 2022-11-15 | 474-758 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wakaw | — |
| 2022-11-15 | 474-759 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Waldheim | — |
| 2022-11-15 | 474-760 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Watrous | — |
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.