NumberResearchRecent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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, last 30 days
New assignments by month
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Oct 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-07-13 | 581-480 | not yet reported which blocks → | Iristel Inc. | 154E | Sainte-Anne-des-Monts | — |
| 2018-07-13 | 581-517 | not yet reported which blocks → | Iristel Inc. | 154E | Baie-Trinite | — |
| 2018-07-13 | 581-518 | not yet reported which blocks → | Iristel Inc. | 154E | Amqui | — |
| 2018-07-13 | 581-519 | not yet reported which blocks → | Iristel Inc. | 154E | Mont-Louis | — |
| 2018-07-13 | 581-797 | not yet reported which blocks → | Iristel Inc. | 154E | Havre-Saint-Pierre | — |
| 2018-07-13 | 581-798 | not yet reported which blocks → | Iristel Inc. | 154E | Mont-Joli | — |
| 2018-07-13 | 581-799 | not yet reported which blocks → | Iristel Inc. | 154E | Saint-Fabien | — |
| 2018-07-13 | 616-256 | 0–9 XXXall 10 · 6 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | GRAND RPDS | MI |
| 2018-07-13 | 734-371 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | DUNDEE | MI |
| 2018-07-13 | 734-410 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | MONROE | MI |
| 2018-07-13 | 786-980 | 0–9 XXXall 10 · 5 holders which blocks → | INVOXIO INCORPORATED | 158H | PERRINE | FL |
| 2018-07-13 | 857-347 | 0–9 XXXall 10 · 5 holders which blocks → | ADVANCED TELECOM SOLUTIONS, LLC | 181J | BOSTON | MA |
| 2018-07-13 | 914-306 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| 2018-07-12 | 312-872 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN01 | IL |
| 2018-07-12 | 351-208 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | LOWELL | MA |
| 2018-07-12 | 417-406 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | BOLIVAR | MO |
| 2018-07-12 | 440-613 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | VICTORY | OH |
| 2018-07-12 | 581-515 | not yet reported which blocks → | Iristel Inc. | 154E | Port-Daniel | — |
| 2018-07-12 | 581-516 | not yet reported which blocks → | Iristel Inc. | 154E | Forestville | — |
| 2018-07-12 | 581-877 | not yet reported which blocks → | Iristel Inc. | 154E | Grande-Vallee | — |
| 2018-07-12 | 581-878 | not yet reported which blocks → | Iristel Inc. | 154E | Perce | — |
| 2018-07-12 | 581-879 | not yet reported which blocks → | Iristel Inc. | 154E | Chandler | — |
| 2018-07-12 | 631-809 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | DEER PARK | NY |
| 2018-07-12 | 850-905 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - FL | 937C | PACE | FL |
| 2018-07-11 | 205-756 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | BESSEMER | AL |
| 2018-07-11 | 205-761 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BIRMINGHAM | AL |
| 2018-07-11 | 225-438 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - LA | 153F | SPRINGFLD | LA |
| 2018-07-11 | 313-217 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN2 | MI |
| 2018-07-11 | 475-241 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | NEW HAVEN | CT |
| 2018-07-11 | 480-506 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2018-07-11 | 551-279 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | RAMSEY | NJ |
| 2018-07-11 | 551-281 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2018-07-11 | 581-508 | not yet reported which blocks → | Iristel Inc. | 154E | Baie-Comeau | — |
| 2018-07-11 | 581-509 | not yet reported which blocks → | Iristel Inc. | 154E | Carleton | — |
| 2018-07-11 | 581-512 | not yet reported which blocks → | Iristel Inc. | 154E | Bonaventure | — |
| 2018-07-11 | 581-513 | not yet reported which blocks → | Iristel Inc. | 154E | Matapedia | — |
| 2018-07-11 | 581-514 | not yet reported which blocks → | Iristel Inc. | 154E | New Richmond | — |
| 2018-07-11 | 779-257 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | WILMINGTON | IL |
| 2018-07-11 | 838-945 | 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | STATE TEL LONG DIST CO INC DBA STATE TEL-ATHENS-NY | 063J | ATHENS | NY |
| 2018-07-11 | 901-427 | 0–9 XXXall 10 · 3 holders which blocks → | WEST KENTUCKY & TENNESSEE TELECOMMUNICATIONS CO-OP | 337J | MEMPHIS | TN |
| 2018-07-11 | 929-482 | 0–9 XXXall 10 · 8 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN14 | NY |
| 2018-07-10 | 515-217 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DES MOINES | IA |
| 2018-07-10 | 786-627 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PERRINE | FL |
| 2018-07-10 | 850-876 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - FL | 937C | PENSACOLA | FL |
| 2018-07-10 | 873-549 | not yet reported which blocks → | Videotron Ltd. | 8306 | La Patrie | — |
| 2018-07-10 | 873-550 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lac-Megantic | — |
| 2018-07-10 | 873-551 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lac-Drolet | — |
| 2018-07-10 | 971-329 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEAVERTON | OR |
| 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 | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.