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 |
|---|---|---|---|---|---|---|
| 2014-09-12 | 647-601 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2013-06-20 | 647-483 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-812 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-813 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-814 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-815 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-816 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-11-15 | 647-817 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-05-04 | 647-742 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-05-04 | 647-743 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2011-03-23 | 647-479 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2010-04-09 | 647-744 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2008-06-06 | 647-600 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2008-03-19 | 647-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2005-12-12 | 647-476 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
| 2001-03-21 | 647-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Toronto | — |
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.