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 |
|---|---|---|---|---|---|---|
| 2013-10-11 | 226-210 | not yet reported which blocks → | Iristel Inc. | 154E | St. Thomas | — |
| 2013-10-11 | 226-774 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2013-10-11 | 226-910 | not yet reported which blocks → | Iristel Inc. | 154E | Owen Sound | — |
| 2012-05-18 | 226-243 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2012-05-02 | 226-272 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2012-03-19 | 226-401 | not yet reported which blocks → | Iristel Inc. | 154E | Brantford | — |
| 2012-02-27 | 226-271 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2012-02-14 | 226-457 | not yet reported which blocks → | Iristel Inc. | 154E | Clinton | — |
| 2012-02-06 | 226-241 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2011-12-14 | 226-270 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2011-11-28 | 226-790 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2011-10-04 | 226-773 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2011-09-22 | 226-400 | not yet reported which blocks → | Iristel Inc. | 154E | Brantford | — |
| 2011-09-20 | 226-786 | not yet reported which blocks → | Iristel Inc. | 154E | Stratford | — |
| 2011-09-20 | 226-798 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2011-09-07 | 226-242 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2011-09-07 | 226-784 | not yet reported which blocks → | Iristel Inc. | 154E | Sarnia | — |
| 2011-08-19 | 226-783 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2011-07-25 | 226-240 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2011-07-25 | 226-785 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2011-06-08 | 226-212 | not yet reported which blocks → | Iristel Inc. | 154E | St. Thomas | — |
| 2011-05-10 | 226-455 | not yet reported which blocks → | Iristel Inc. | 154E | Clinton | — |
| 2011-05-10 | 226-909 | not yet reported which blocks → | Iristel Inc. | 154E | Owen Sound | — |
| 2010-11-23 | 226-781 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2010-11-23 | 226-782 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2010-11-11 | 226-499 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2010-09-09 | 226-778 | not yet reported which blocks → | Iristel Inc. | 154E | Sarnia | — |
| 2010-09-09 | 226-779 | not yet reported which blocks → | Iristel Inc. | 154E | Stratford | — |
| 2010-09-09 | 226-780 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2009-10-28 | 226-799 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2009-02-25 | 226-887 | not yet reported which blocks → | Iristel Inc. | 154E | Hespeler | — |
| 2007-11-12 | 226-444 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2007-11-12 | 226-777 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
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.