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.
Most active assignees, all time — NPA 587
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2016-02-10 | 587-872 | not yet reported which blocks → | Iristel Inc. | 154E | Olds | — |
| 2016-02-10 | 587-874 | not yet reported which blocks → | Iristel Inc. | 154E | Oyen | — |
| 2016-02-08 | 587-871 | not yet reported which blocks → | Iristel Inc. | 154E | Langdon | — |
| 2016-02-05 | 587-207 | not yet reported which blocks → | Iristel Inc. | 154E | Hanna | — |
| 2016-02-05 | 587-208 | not yet reported which blocks → | Iristel Inc. | 154E | High River | — |
| 2016-02-05 | 587-209 | not yet reported which blocks → | Iristel Inc. | 154E | Hinton | — |
| 2016-02-05 | 587-870 | not yet reported which blocks → | Iristel Inc. | 154E | Jasper | — |
| 2016-02-04 | 587-419 | not yet reported which blocks → | Iristel Inc. | 154E | Drumheller | — |
| 2016-02-04 | 587-809 | not yet reported which blocks → | Iristel Inc. | 154E | Fox Creek | — |
| 2016-02-04 | 587-812 | not yet reported which blocks → | Iristel Inc. | 154E | Grande Cache | — |
| 2016-02-03 | 587-417 | not yet reported which blocks → | Iristel Inc. | 154E | Claresholm | — |
| 2016-02-03 | 587-418 | not yet reported which blocks → | Iristel Inc. | 154E | Coaldale | — |
| 2016-02-03 | 587-807 | not yet reported which blocks → | Iristel Inc. | 154E | Canmore | — |
| 2016-02-01 | 587-507 | not yet reported which blocks → | Iristel Inc. | 154E | Blackfalds | — |
| 2016-02-01 | 587-806 | not yet reported which blocks → | Iristel Inc. | 154E | Anzac | — |
| 2016-02-01 | 587-907 | not yet reported which blocks → | Iristel Inc. | 154E | Banff | — |
| 2016-01-13 | 587-604 | not yet reported which blocks → | Iristel Inc. | 154E | Fort McMurray | — |
| 2016-01-07 | 587-602 | not yet reported which blocks → | Iristel Inc. | 154E | Airdrie | — |
| 2015-12-24 | 587-804 | not yet reported which blocks → | Iristel Inc. | 154E | Vegreville | — |
| 2014-10-17 | 587-601 | not yet reported which blocks → | Iristel Inc. | 154E | Fort McMurray | — |
| 2013-10-25 | 587-805 | not yet reported which blocks → | Iristel Inc. | 154E | St. Albert | — |
| 2013-10-18 | 587-600 | not yet reported which blocks → | Iristel Inc. | 154E | Airdrie | — |
| 2012-06-26 | 587-800 | not yet reported which blocks → | Iristel Inc. | 154E | Lethbridge | — |
| 2012-06-26 | 587-801 | not yet reported which blocks → | Iristel Inc. | 154E | Medicine Hat | — |
| 2012-06-26 | 587-802 | not yet reported which blocks → | Iristel Inc. | 154E | Red Deer | — |
| 2012-06-26 | 587-803 | not yet reported which blocks → | Iristel Inc. | 154E | Grande Prairie | — |
| 2012-04-18 | 587-414 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-18 | 587-415 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-18 | 587-416 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-17 | 587-315 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-17 | 587-316 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-17 | 587-317 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-04 | 587-320 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-03 | 587-318 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-03 | 587-319 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-03 | 587-412 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-03 | 587-413 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-03-20 | 587-409 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-03-20 | 587-410 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-02-24 | 587-323 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-02-24 | 587-324 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-02-14 | 587-407 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-02-14 | 587-408 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-02-10 | 587-325 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-02-10 | 587-326 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-327 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-328 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-329 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-404 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2011-12-01 | 587-405 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
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.