NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-04-17 469-469 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2018-04-17 516-602 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN02 NY
2018-04-17 813-485 0–9 XXXall 10 · 3 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L TAMPACEN FL
2018-04-17 850-746 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 PENSACOLA FL
2018-04-17 873-247 not yet reported which blocks → Distributel 083E Sawyerville —
2018-04-17 873-248 not yet reported which blocks → Distributel 083E Scotstown —
2018-04-17 873-289 not yet reported which blocks → Distributel 083E St-Adolphe-de-Dudswell —
2018-04-17 873-290 not yet reported which blocks → Distributel 083E St-Felix-de-Kingsey —
2018-04-17 873-291 not yet reported which blocks → Distributel 083E St-Malo —
2018-04-17 873-292 not yet reported which blocks → Distributel 083E Stoke —
2018-04-17 873-293 not yet reported which blocks → Distributel 083E Weedon —
2018-04-17 873-294 not yet reported which blocks → Distributel 083E Windsor —
2018-04-17 873-295 not yet reported which blocks → Distributel 083E Wotton —
2018-04-17 873-298 not yet reported which blocks → Distributel 083E South Durham —
2018-04-17 873-299 not yet reported which blocks → Distributel 083E St-Sebastien (Frontenac Co.) —
2018-04-17 908-404 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LINDEN NJ
2018-04-17 939-441 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-17 939-478 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2018-04-17 947-886 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PONTIAC MI
2018-04-16 224-291 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2018-04-16 424-407 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-04-16 516-601 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN02 NY
2018-04-16 618-418 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 BELLEVILLE IL
2018-04-16 805-670 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OXNARD CA
2018-04-16 873-234 not yet reported which blocks → Distributel 083E Bromptonville —
2018-04-16 873-235 not yet reported which blocks → Distributel 083E Bury —
2018-04-16 873-236 not yet reported which blocks → Distributel 083E Chartierville —
2018-04-16 873-237 not yet reported which blocks → Distributel 083E Cookshire —
2018-04-16 873-238 not yet reported which blocks → Distributel 083E Deauville —
2018-04-16 873-239 not yet reported which blocks → Distributel 083E East Angus —
2018-04-16 873-244 not yet reported which blocks → Distributel 083E East Hereford —
2018-04-16 873-245 not yet reported which blocks → Distributel 083E La Patrie —
2018-04-16 873-246 not yet reported which blocks → Distributel 083E Richmond —
2018-04-16 873-296 not yet reported which blocks → Distributel 083E Danville —
2018-04-16 873-297 not yet reported which blocks → Distributel 083E Lac-Drolet —
2018-04-16 951-450 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D PERRIS CA
2018-04-13 470-707 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2018-04-13 579-323 not yet reported which blocks → Distributel 083E St-Cesaire —
2018-04-13 579-324 not yet reported which blocks → Distributel 083E St-Paul-D'Abbotsford —
2018-04-13 579-325 not yet reported which blocks → Distributel 083E Waterloo —
2018-04-13 579-328 not yet reported which blocks → Distributel 083E Mansonville —
2018-04-13 579-329 not yet reported which blocks → Distributel 083E Sutton —
2018-04-13 626-469 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D PSDN PSDN CA
2018-04-13 631-309 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 AMITYVILLE NY
2018-04-13 805-609 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D OXNARD CA
2018-04-13 873-232 not yet reported which blocks → Distributel 083E Asbestos —
2018-04-13 873-233 not yet reported which blocks → Distributel 083E Bishopton —
2018-04-13 909-507 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D FONTANA CA
2018-04-12 226-539 not yet reported which blocks → Distributel 082E Rockwood —
2018-04-12 226-540 not yet reported which blocks → Distributel 082E Acton —

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.