NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-11-03 502-651 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-03 509-208 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2021-11-03 562-620 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H LONG BEACH CA
2021-11-03 606-635 0XXX5XXX9XXX · 3 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C PRESTONSBG KY
2021-11-03 626-702 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LA PUENTE CA
2021-11-03 628-313 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2021-11-03 681-372 0XXX1XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F RAVENSWOOD WV
2021-11-03 681-431 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F WEST UNION WV
2021-11-03 737-420 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H AUSTIN TX
2021-11-03 802-486 0XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 E CORINTH VT
2021-11-03 810-276 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PORT HURON MI
2021-11-03 848-321 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CARTERET NJ
2021-11-03 916-994 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2021-11-03 920-817 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - WI 6274 FTATKINSON WI
2021-11-03 939-866 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 TRUJILLOAL PR
2021-11-03 945-231 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SEAGOVILLE TX
2021-11-03 970-843 0XXX1XXX2XXX5XXX8XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H ALLISON CO
2021-11-03 980-808 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHARLOTTE NC
2021-11-03 989-209 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ST JOHNS MI
2021-11-02 346-521 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SUGAR LAND TX
2021-11-02 346-523 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C KEMAH TX
2021-11-02 361-283 0–9 XXXall 10 · 2 holders which blocks → STPCS JOINT VENTURE, LLC 4290 ALICE TX
2021-11-02 409-282 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C PORTARTHUR TX
2021-11-02 425-506 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 430-292 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MABANK TX
2021-11-02 440-761 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TRINITY OH
2021-11-02 447-216 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DANVILLE IL
2021-11-02 458-275 0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CRESWELL OR
2021-11-02 464-333 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HARVEY IL
2021-11-02 464-444 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BEECHER IL
2021-11-02 464-600 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H FOREST IL
2021-11-02 464-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CALUMET CY IL
2021-11-02 464-777 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WILLOW SPG IL
2021-11-02 464-800 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H TINLEYPARK IL
2021-11-02 464-888 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ORLAND IL
2021-11-02 531-279 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 GENOA NE
2021-11-02 629-270 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NASHVILLE TN
2021-11-02 669-499 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNJS NORTH CA
2021-11-02 682-363 0XXX1XXX3XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F ROANOKE TX
2021-11-02 719-414 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D LAS ANIMAS CO
2021-11-02 737-312 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C KYLE TX
2021-11-02 769-273 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H JACKSON MS
2021-11-02 913-408 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2021-11-02 945-230 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-11-02 956-646 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DONNA TX
2021-11-02 956-663 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C EDINBURG TX
2021-11-01 223-267 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 HANOVER PA
2021-11-01 229-283 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FITZGERALD GA
2021-11-01 321-376 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2021-11-01 346-520 0–9 XXXall 10 · 2 holders which blocks → CALLWORKS CORPORATION 475J HOUSTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.