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
2021-11-04 725-267 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-11-04 725-268 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAUGHLIN NV
2021-11-04 726-216 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2021-11-04 737-310 0–9 XXXall 10 · 7 holders which blocks → HD CARRIER LLC 321J WIMBERLEY TX
2021-11-04 765-804 2XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC - IN 097D FILLMORE IN
2021-11-04 779-343 0XXX3XXX4XXX · 3 holders which blocks → ONVOY, LLC 224C GERMAN VLY IL
2021-11-04 779-344 0XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC 224C SEWARD IL
2021-11-04 779-347 0XXX1XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C WINSLOW IL
2021-11-04 872-297 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-04 951-592 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C RIVERSIDE CA
2021-11-04 951-875 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C BANNING CA
2021-11-04 954-819 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2021-11-04 972-688 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PLANO TX
2021-11-03 206-791 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2021-11-03 213-586 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2021-11-03 213-594 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2021-11-03 213-638 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2021-11-03 231-397 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-11-03 269-391 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2021-11-03 307-384 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H AFTON WY
2021-11-03 313-612 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 385-446 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 445-227 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
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

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.