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 |
|---|---|---|---|---|---|---|
| 2012-05-02 | 438-793 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-794 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-795 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-796 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-12 | 438-500 | not yet reported which blocks → | Iristel Inc. | 154E | Pointe-Claire | — |
| 2012-04-04 | 438-797 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-04 | 438-798 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-04 | 438-799 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-03-19 | 438-700 | not yet reported which blocks → | Iristel Inc. | 154E | Ile-Perrot | — |
| 2012-02-27 | 438-813 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-02-27 | 438-814 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-02-27 | 438-815 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-02-27 | 438-816 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-02-27 | 438-817 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 438-808 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 438-809 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 438-812 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-09-20 | 438-807 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-09-16 | 438-806 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-07-28 | 438-804 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-07-28 | 438-805 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-07-26 | 438-801 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-07-26 | 438-802 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-07-26 | 438-803 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-01-11 | 438-800 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
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.