NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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.
Most active assignees, all time — NPA 226
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2020-09-25 | 226-741 | not yet reported which blocks → | Iristel Inc. | 154E | Tillsonburg | — |
| 2020-09-18 | 226-793 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2020-09-15 | 226-708 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2020-09-14 | 226-697 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2020-09-14 | 226-896 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2020-08-27 | 226-756 | not yet reported which blocks → | Iristel Inc. | 154E | Listowel | — |
| 2020-02-12 | 226-546 | not yet reported which blocks → | Iristel Inc. | 154E | St. Thomas | — |
| 2020-02-11 | 226-801 | not yet reported which blocks → | Iristel Inc. | 154E | Stratford | — |
| 2020-02-11 | 226-829 | not yet reported which blocks → | Iristel Inc. | 154E | Wingham | — |
| 2020-02-11 | 226-839 | not yet reported which blocks → | Iristel Inc. | 154E | Walkerton | — |
| 2019-10-29 | 226-544 | not yet reported which blocks → | Iristel Inc. | 154E | Aylmer | — |
| 2019-10-11 | 226-906 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2019-10-11 | 226-907 | not yet reported which blocks → | Iristel Inc. | 154E | Durham | — |
| 2019-09-25 | 226-705 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2019-08-02 | 226-703 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2019-08-02 | 226-704 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2019-07-26 | 226-918 | not yet reported which blocks → | Iristel Inc. | 154E | Leamington | — |
| 2019-07-19 | 226-807 | not yet reported which blocks → | Iristel Inc. | 154E | Hespeler | — |
| 2019-07-02 | 226-794 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2018-12-18 | 226-639 | not yet reported which blocks → | Iristel Inc. | 154E | Belmont | — |
| 2018-07-09 | 226-605 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2018-07-09 | 226-795 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2018-07-09 | 226-803 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2017-11-22 | 226-771 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2017-11-21 | 226-408 | not yet reported which blocks → | Iristel Inc. | 154E | Goderich | — |
| 2017-09-06 | 226-917 | not yet reported which blocks → | Iristel Inc. | 154E | Orangeville | — |
| 2017-08-21 | 226-407 | not yet reported which blocks → | Iristel Inc. | 154E | Belmont | — |
| 2017-06-16 | 226-796 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2017-05-24 | 226-908 | not yet reported which blocks → | Iristel Inc. | 154E | Owen Sound | — |
| 2017-02-23 | 226-804 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2016-02-26 | 226-805 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2016-02-19 | 226-842 | not yet reported which blocks → | Iristel Inc. | 154E | Sarnia | — |
| 2016-02-18 | 226-273 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2016-02-18 | 226-775 | not yet reported which blocks → | Iristel Inc. | 154E | Stratford | — |
| 2016-02-16 | 226-770 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2016-02-16 | 226-797 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2016-02-16 | 226-841 | not yet reported which blocks → | Iristel Inc. | 154E | Wingham | — |
| 2016-02-16 | 226-890 | not yet reported which blocks → | Iristel Inc. | 154E | Hespeler | — |
| 2016-02-12 | 226-641 | not yet reported which blocks → | Iristel Inc. | 154E | Tillsonburg | — |
| 2016-02-12 | 226-840 | not yet reported which blocks → | Iristel Inc. | 154E | Walkerton | — |
| 2016-02-08 | 226-286 | not yet reported which blocks → | Iristel Inc. | 154E | Leamington | — |
| 2016-02-08 | 226-640 | not yet reported which blocks → | Iristel Inc. | 154E | Listowel | — |
| 2016-02-04 | 226-458 | not yet reported which blocks → | Iristel Inc. | 154E | Goderich | — |
| 2016-02-04 | 226-602 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2016-02-04 | 226-702 | not yet reported which blocks → | Iristel Inc. | 154E | Durham | — |
| 2016-02-01 | 226-406 | not yet reported which blocks → | Iristel Inc. | 154E | Belmont | — |
| 2016-01-29 | 226-895 | not yet reported which blocks → | Iristel Inc. | 154E | Galt | — |
| 2015-09-28 | 226-916 | not yet reported which blocks → | Iristel Inc. | 154E | Orangeville | — |
| 2014-11-20 | 226-806 | not yet reported which blocks → | Iristel Inc. | 154E | Kitchener-Waterloo | — |
| 2013-10-18 | 226-894 | not yet reported which blocks → | Iristel Inc. | 154E | Galt | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.