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 |
|---|---|---|---|---|---|---|
| 2015-09-15 | 819-253 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Drummondville | — |
| 2013-03-28 | 819-917 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rouyn-Noranda | — |
| 2013-03-28 | 819-924 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Malartic | — |
| 2013-03-28 | 819-925 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lebel-sur-Quevillon | — |
| 2013-03-28 | 819-940 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Sarre | — |
| 2013-03-28 | 819-945 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cadillac | — |
| 2013-03-28 | 819-946 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ville-Marie | — |
| 2013-03-28 | 819-952 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Senneterre | — |
| 2013-03-28 | 819-954 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Amos | — |
| 2013-03-07 | 819-831 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Val-D'Or | — |
| 2012-07-10 | 819-489 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Trois-Rivieres | — |
| 2011-08-30 | 819-914 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ottawa-Hull | — |
| 2011-08-30 | 819-915 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Aylmer | — |
| 2011-08-30 | 819-916 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Gatineau | — |
| 2009-05-28 | 819-481 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Sherbrooke | — |
| 2009-05-28 | 819-484 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ottawa-Hull | — |
| 2009-05-28 | 819-485 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Gatineau | — |
| 2009-05-28 | 819-486 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Aylmer | — |
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.