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 581
New assignments by month
Sep 2026
Aug 2026
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May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-08-22 | 581-319 | not yet reported which blocks → | Distributel | 083E | Quebec | — |
| 2012-08-07 | 581-722 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Saint-Georges-de-Beauce | — |
| 2012-06-01 | 581-200 | not yet reported which blocks → | Iristel Inc. | 154E | Alma | — |
| 2012-06-01 | 581-500 | not yet reported which blocks → | Iristel Inc. | 154E | Levis | — |
| 2012-05-31 | 581-377 | not yet reported which blocks → | TELUS Quebec | 2243 | Leeds | — |
| 2012-05-31 | 581-378 | not yet reported which blocks → | TELUS Quebec | 2243 | Saint-Odilon | — |
| 2012-05-31 | 581-379 | not yet reported which blocks → | TELUS Quebec | 2243 | Sainte-Rose | — |
| 2012-05-31 | 581-380 | not yet reported which blocks → | TELUS Quebec | 2243 | Sainte-Justine | — |
| 2012-04-18 | 581-644 | not yet reported which blocks → | Videotron Ltd. | 8306 | Colombier | — |
| 2012-04-12 | 581-721 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | St-Felicien | — |
| 2012-04-05 | 581-705 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2012-04-05 | 581-742 | not yet reported which blocks → | Videotron Ltd. | 8306 | Quebec | — |
| 2012-03-22 | 581-309 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2012-03-22 | 581-337 | not yet reported which blocks → | Bell Mobility | 6574 | Riviere-du-Loup | — |
| 2012-03-22 | 581-704 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2012-03-20 | 581-681 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 2012-03-19 | 581-221 | not yet reported which blocks → | Iristel Inc. | 154E | Chicoutimi | — |
| 2012-03-08 | 581-643 | not yet reported which blocks → | Videotron Ltd. | 8306 | Chute-aux-Outardes | — |
| 2012-03-07 | 581-327 | not yet reported which blocks → | Videotron Ltd. | 8306 | Tadoussac | — |
| 2012-02-27 | 581-642 | not yet reported which blocks → | Videotron Ltd. | 8306 | Baie-Comeau (Hauterive) | — |
| 2012-02-23 | 581-647 | not yet reported which blocks → | Videotron Ltd. | 8306 | Squatec | — |
| 2012-02-09 | 581-444 | not yet reported which blocks → | Bell Mobility | 6574 | Fermont | — |
| 2012-01-26 | 581-320 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sault-au-Mouton | — |
| 2012-01-26 | 581-322 | not yet reported which blocks → | Videotron Ltd. | 8306 | Les Escoumins | — |
| 2012-01-24 | 581-321 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sacre-Coeur | — |
| 2012-01-24 | 581-323 | not yet reported which blocks → | Videotron Ltd. | 8306 | Ste-Anne-de-Portneuf | — |
| 2012-01-24 | 581-324 | not yet reported which blocks → | Videotron Ltd. | 8306 | Bergeronnes | — |
| 2012-01-11 | 581-646 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Jean-de-Dieu | — |
| 2011-12-13 | 581-265 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Alma | — |
| 2011-10-28 | 581-230 | not yet reported which blocks → | TELUS Mobility | 8303 | Alma | — |
| 2011-10-28 | 581-990 | not yet reported which blocks → | TELUS Mobility | 8303 | Quebec | — |
| 2011-10-25 | 581-624 | not yet reported which blocks → | TELUS Mobility | 8303 | Rimouski | — |
| 2011-10-21 | 581-231 | not yet reported which blocks → | TELUS Mobility | 8303 | Fermont | — |
| 2011-10-17 | 581-208 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | St-Ferdinand-D'Halifax | — |
| 2011-10-17 | 581-209 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Disraeli | — |
| 2011-10-04 | 581-703 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2011-09-19 | 581-726 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Baie-Comeau (Hauterive) | — |
| 2011-09-19 | 581-929 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Baie-Comeau (Hauterive) | — |
| 2011-09-16 | 581-702 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2011-09-13 | 581-245 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sacre-Coeur | — |
| 2011-09-13 | 581-255 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sault-au-Mouton | — |
| 2011-09-13 | 581-256 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Fidele | — |
| 2011-09-13 | 581-257 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Hilarion | — |
| 2011-09-13 | 581-258 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Irenee | — |
| 2011-09-13 | 581-259 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Urbain | — |
| 2011-09-13 | 581-260 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Ste-Anne-de-Portneuf | — |
| 2011-09-13 | 581-263 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Tadoussac | — |
| 2011-09-13 | 581-264 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Simeon | — |
| 2011-09-12 | 581-236 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Baie-Ste-Catherine | — |
| 2011-09-12 | 581-237 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Baie-St-Paul | — |
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.