NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 579
New assignments by month
Sep 2026
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Jul 2026
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May 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2017-11-07 | 579-297 | not yet reported which blocks → | TELUS Quebec | 2243 | Bedford | — |
| 2017-11-07 | 579-298 | not yet reported which blocks → | TELUS Quebec | 2243 | Lacolle | — |
| 2017-11-07 | 579-299 | not yet reported which blocks → | TELUS Quebec | 2243 | Hemmingford | — |
| 2017-11-07 | 579-301 | not yet reported which blocks → | TELUS Quebec | 2243 | Napierville | — |
| 2017-03-13 | 579-287 | not yet reported which blocks → | TELUS Quebec | 2243 | Berthierville | — |
| 2017-03-13 | 579-289 | not yet reported which blocks → | TELUS Quebec | 2243 | Lavaltrie | — |
| 2017-03-13 | 579-290 | not yet reported which blocks → | TELUS Quebec | 2243 | Rawdon | — |
| 2017-03-13 | 579-291 | not yet reported which blocks → | TELUS Quebec | 2243 | Crabtree | — |
| 2017-03-13 | 579-292 | not yet reported which blocks → | TELUS Quebec | 2243 | Le Gardeur | — |
| 2017-03-13 | 579-293 | not yet reported which blocks → | TELUS Quebec | 2243 | Lanoraie | — |
| 2017-03-13 | 579-294 | not yet reported which blocks → | TELUS Quebec | 2243 | L'Epiphanie-l'Assomption | — |
| 2017-02-23 | 579-286 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Marguerite | — |
| 2016-10-24 | 579-200 | not yet reported which blocks → | TELUS Quebec | 2243 | Lachute | — |
| 2016-10-24 | 579-201 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Sauveur | — |
| 2016-10-24 | 579-202 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Adele | — |
| 2016-10-24 | 579-203 | not yet reported which blocks → | TELUS Quebec | 2243 | Brownsburg | — |
| 2016-07-06 | 579-281 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Jerome | — |
| 2016-07-06 | 579-282 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Calixte-de-Kilkenny | — |
| 2016-07-06 | 579-283 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Lin | — |
| 2016-07-06 | 579-284 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Hippolyte | — |
| 2016-07-06 | 579-285 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Vincent-de-Paul | — |
| 2016-06-10 | 579-204 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Rose | — |
| 2016-03-21 | 579-205 | not yet reported which blocks → | TELUS Quebec | 2243 | Yamaska | — |
| 2016-03-21 | 579-206 | not yet reported which blocks → | TELUS Quebec | 2243 | Pierreville | — |
| 2016-03-21 | 579-207 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Barthelemy | — |
| 2016-03-21 | 579-208 | not yet reported which blocks → | TELUS Quebec | 2243 | Berthierville | — |
| 2016-03-21 | 579-209 | not yet reported which blocks → | TELUS Quebec | 2243 | Farnham | — |
| 2015-07-15 | 579-210 | not yet reported which blocks → | TELUS Quebec | 2243 | Vercheres | — |
| 2015-06-29 | 579-212 | not yet reported which blocks → | TELUS Quebec | 2243 | Cowansville | — |
| 2015-06-29 | 579-213 | not yet reported which blocks → | TELUS Quebec | 2243 | Granby | — |
| 2015-06-29 | 579-256 | not yet reported which blocks → | TELUS Quebec | 2243 | Bromont | — |
| 2015-06-12 | 579-254 | not yet reported which blocks → | TELUS Quebec | 2243 | Mirabel-Aeroport | — |
| 2014-12-19 | 579-252 | not yet reported which blocks → | TELUS Quebec | 2243 | Chomedey | — |
| 2014-12-19 | 579-253 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Julie-de-Vercheres | — |
| 2014-07-16 | 579-214 | not yet reported which blocks → | TELUS Quebec | 2243 | Longueuil | — |
| 2014-07-16 | 579-215 | not yet reported which blocks → | TELUS Quebec | 2243 | Boucherville | — |
| 2014-03-07 | 579-216 | not yet reported which blocks → | TELUS Quebec | 2243 | Cowansville | — |
| 2013-09-25 | 579-217 | not yet reported which blocks → | TELUS Quebec | 2243 | Vaudreuil | — |
| 2013-09-03 | 579-251 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Eustache | — |
| 2013-08-20 | 579-218 | not yet reported which blocks → | TELUS Quebec | 2243 | Laval-Est | — |
| 2013-08-20 | 579-219 | not yet reported which blocks → | TELUS Quebec | 2243 | Laval-Ouest | — |
| 2013-08-20 | 579-220 | not yet reported which blocks → | TELUS Quebec | 2243 | Chambly | — |
| 2013-08-20 | 579-221 | not yet reported which blocks → | TELUS Quebec | 2243 | Laprairie | — |
| 2013-08-20 | 579-222 | not yet reported which blocks → | TELUS Quebec | 2243 | Marieville | — |
| 2013-08-20 | 579-223 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Bruno | — |
| 2013-07-05 | 579-248 | not yet reported which blocks → | TELUS Quebec | 2243 | Joliette | — |
| 2013-07-05 | 579-249 | not yet reported which blocks → | TELUS Quebec | 2243 | Sorel | — |
| 2013-07-05 | 579-250 | not yet reported which blocks → | TELUS Quebec | 2243 | Valleyfield | — |
| 2013-04-16 | 579-224 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Jean | — |
| 2013-02-25 | 579-225 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Hyacinthe | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.