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 |
|---|---|---|---|---|---|---|
| 2019-09-20 | 226-309 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Orangeville | — |
| 2019-09-20 | 226-537 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Owen Sound | — |
| 2012-05-04 | 226-494 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chatham | — |
| 2010-07-15 | 226-493 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Brantford | — |
| 2009-06-30 | 226-486 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Guelph | — |
| 2008-07-31 | 226-473 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Preston | — |
| 2008-07-31 | 226-474 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Galt | — |
| 2008-07-31 | 226-475 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hespeler | — |
| 2008-07-08 | 226-476 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Kitchener-Waterloo | — |
| 2007-06-01 | 226-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Amherstburg | — |
| 2007-06-01 | 226-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Belle River | — |
| 2007-06-01 | 226-479 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Essex | — |
| 2007-06-01 | 226-480 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Harrow | — |
| 2007-06-01 | 226-481 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Maidstone | — |
| 2007-06-01 | 226-482 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | McGregor | — |
| 2007-06-01 | 226-483 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Stoney Point | — |
| 2007-06-01 | 226-484 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wheatley | — |
| 2007-06-01 | 226-485 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Woodslee | — |
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.