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
2019-07-30 505-403 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J ALBUQURQUE NM
2019-07-30 509-503 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F SPOKANE WA
2019-07-30 581-872 not yet reported which blocks → Iristel Inc. 154E Quebec —
2019-07-30 581-873 not yet reported which blocks → Iristel Inc. 154E Quebec —
2019-07-30 581-874 not yet reported which blocks → Iristel Inc. 154E Quebec —
2019-07-30 712-492 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 6 holders which blocks → INTERSTATE CABLEVISION COMPANY - IA 860E OAKLAND IA
2019-07-30 720-826 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2019-07-30 814-417 0–9 XXXall 10 · 7 holders which blocks → VERIZON NORTH, INC. - PA 0169 SOMERSET PA
2019-07-30 941-265 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 BOCAGRANDE FL
2019-07-29 539-234 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J TAHLEQUAH OK
2019-07-29 681-290 0XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F ELK GARDEN WV
2019-07-29 681-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F RIDGELEY WV
2019-07-29 689-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C WINDERMERE FL
2019-07-29 810-363 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PORT HURON MI
2019-07-29 825-609 not yet reported which blocks → Iristel Inc. 154E Lethbridge —
2019-07-29 825-805 not yet reported which blocks → Iristel Inc. 154E Lloydminster —
2019-07-29 904-780 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C FERNADNBCH FL
2019-07-29 984-249 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BENSON NC
2019-07-26 226-918 not yet reported which blocks → Iristel Inc. 154E Leamington —
2019-07-26 346-389 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BEACH CITY TX
2019-07-26 510-994 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2019-07-26 551-305 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 RIDGEWOOD NJ
2019-07-26 579-807 not yet reported which blocks → Iristel Inc. 154E Laval-Est —
2019-07-26 579-978 not yet reported which blocks → Iristel Inc. 154E Laval-Ouest —
2019-07-26 579-986 not yet reported which blocks → Iristel Inc. 154E L'Epiphanie-l'Assomption —
2019-07-26 579-992 not yet reported which blocks → Iristel Inc. 154E Lanoraie —
2019-07-26 626-517 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2019-07-26 737-258 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 MILANO TX
2019-07-26 816-681 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2019-07-26 984-266 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E BONLEE NC
2019-07-25 343-313 not yet reported which blocks → Iristel Inc. 154E Jockvale —
2019-07-25 409-402 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C PT BOLIVAR TX
2019-07-25 409-403 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C NDLDPTNCHS TX
2019-07-25 409-405 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ORANGE TX
2019-07-25 409-407 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C WESTBURY TX
2019-07-25 430-259 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C CARTHAGE TX
2019-07-25 430-260 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C LINDL SWAN TX
2019-07-25 430-261 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MINEOLA TX
2019-07-25 430-400 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C LADONIA TX
2019-07-25 430-500 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H POTTSBORO TX
2019-07-25 469-972 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C FERRIS TX
2019-07-25 581-910 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2019-07-25 737-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BASTROP TX
2019-07-25 737-510 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BERTRAM TX
2019-07-25 737-520 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C FENTRESS TX
2019-07-25 737-530 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - TX 903C LOMETA TX
2019-07-25 806-900 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C SLATON TX
2019-07-25 825-607 not yet reported which blocks → Iristel Inc. 154E High Level —
2019-07-25 825-608 not yet reported which blocks → Iristel Inc. 154E High River —
2019-07-25 936-930 0XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C WASHINGTON TX

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.