NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-09-29 865-378 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J KNOXVILLE TN
2020-09-29 901-560 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J MEMPHIS TN
2020-09-29 989-809 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C SANFORD MI
2020-09-28 207-630 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 YORK ME
2020-09-28 210-948 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J SANANTONIO TX
2020-09-28 254-416 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J WACO TX
2020-09-28 319-386 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MEDIAPOLIS IA
2020-09-28 325-289 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J ABILENE TX
2020-09-28 346-438 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J HOUSTON TX
2020-09-28 352-664 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J GAINESVL FL
2020-09-28 361-267 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J C CHRISTI TX
2020-09-28 386-287 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E LAKE CITY FL
2020-09-28 409-259 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J BEAUMONT TX
2020-09-28 432-280 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J ODESSA TX
2020-09-28 445-224 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 LANSDALE PA
2020-09-28 458-254 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2020-09-28 458-255 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - OR 6349 HERMISTON OR
2020-09-28 469-902 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J DALLAS TX
2020-09-28 540-790 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H ROANOKE VA
2020-09-28 609-322 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C TRENTON NJ
2020-09-28 657-457 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-09-28 681-677 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F CHARLES TN WV
2020-09-28 725-238 0–9 XXXall 10 · 4 holders which blocks → NOS COMMUNICATIONS, INC. - NV 030J LAS VEGAS NV
2020-09-28 737-280 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2020-09-28 737-281 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J AUSTIN TX
2020-09-28 757-994 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H NRFOLKZON2 VA
2020-09-28 772-732 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PTST LUCIE FL
2020-09-28 806-715 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J LUBBOCK TX
2020-09-28 806-718 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J AMARILLO TX
2020-09-28 813-588 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PLANT CITY FL
2020-09-28 814-925 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J ALTOONA PA
2020-09-28 838-221 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J ALBANY NY
2020-09-28 848-296 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PERTHAMBOY NJ
2020-09-28 850-943 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J PENSACOLA FL
2020-09-28 903-991 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J TYLER TX
2020-09-28 904-650 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J JACKSONVL FL
2020-09-28 909-852 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ETIWANDA CA
2020-09-28 909-871 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MARSHALL CA
2020-09-28 909-892 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 UPLAND CA
2020-09-28 915-266 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J EL PASO TX
2020-09-28 940-375 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J WICHITAFLS TX
2020-09-28 941-477 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VENICE FL
2020-09-28 951-557 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-28 956-594 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J BROWNSVL TX
2020-09-25 226-741 not yet reported which blocks → Iristel Inc. 154E Tillsonburg —
2020-09-25 236-900 not yet reported which blocks → Iristel Inc. 154E New Westminster —
2020-09-25 334-778 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E DOTHAN AL
2020-09-25 334-934 0XXX3XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - AL 604E GOSHEN AL
2020-09-25 343-353 not yet reported which blocks → Iristel Inc. 154E Kanata-Stittsville —
2020-09-25 343-946 not yet reported which blocks → Iristel Inc. 154E Bancroft —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.