NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
2018-04-16 618-418 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 —
2018-04-12 571-649 0–9 XXXwhole prefix which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-12 579-319 not yet reported which blocks → Distributel 083E Bromont —
2018-04-12 579-320 not yet reported which blocks → Distributel 083E Cowansville —
2018-04-12 579-321 not yet reported which blocks → Distributel 083E Dunham —
2018-04-12 579-322 not yet reported which blocks → Distributel 083E Knowlton —
2018-04-12 579-326 not yet reported which blocks → Distributel 083E Eastman —
2018-04-12 579-327 not yet reported which blocks → Distributel 083E Frelighsburg —
2018-04-12 616-416 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HOLLAND MI
2018-04-12 657-320 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ORANGE CA
2018-04-12 762-227 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COMMERCE GA
2018-04-12 843-895 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC 527H HILTONHEAD SC
2018-04-12 939-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-11 236-255 not yet reported which blocks → Bell Mobility 6574 Courtenay —
2018-04-11 343-202 not yet reported which blocks → Videotron Ltd. 328F Ottawa-Hull —
2018-04-11 343-543 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2018-04-11 343-960 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2018-04-11 343-961 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2018-04-11 343-962 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2018-04-11 343-963 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2018-04-11 442-280 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BARSTOW CA
2018-04-11 445-737 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-11 470-471 0–9 XXXall 10 · 2 holders which blocks → WIDE VOICE, LLC - GA 529H ATLANTA GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.