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
2021-10-27 551-334 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 KEARNY NJ
2021-10-27 571-516 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2021-10-27 662-683 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 CLARKSDALE MS
2021-10-27 689-263 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2021-10-27 743-236 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2021-10-27 840-205 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2021-10-27 986-866 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H OROFINO ID
2021-10-26 213-592 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2021-10-26 216-474 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F INDEPNDNCE OH
2021-10-26 219-295 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CROWNPOINT IN
2021-10-26 231-390 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 236-514 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 236-515 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 236-516 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 309-900 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FARMINGTON IL
2021-10-26 341-207 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-10-26 341-208 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-10-26 346-517 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2021-10-26 347-519 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2021-10-26 385-426 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-443 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-26 385-451 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-10-26 437-255 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-10-26 437-256 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-10-26 442-368 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 VICTORVL CA
2021-10-26 445-218 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 QUAKERTOWN PA
2021-10-26 447-766 0–9 XXXall 10 · 9 holders which blocks → FRACTEL, LLC 965H CATLIN IL
2021-10-26 520-596 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2021-10-26 551-366 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ENGLEWOOD NJ
2021-10-26 562-579 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DOWNEY CA
2021-10-26 564-216 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2021-10-26 575-285 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2021-10-26 608-701 1XXX2XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F DE SOTO WI
2021-10-26 619-953 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-10-26 626-565 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ALHAMBRA CA
2021-10-26 626-596 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL MONTE CA
2021-10-26 650-602 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2021-10-26 650-675 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
2021-10-26 657-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-10-26 657-524 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2021-10-26 657-530 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BREA CA
2021-10-26 657-957 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2021-10-26 669-331 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2021-10-26 716-547 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WILLIAMSVL NY
2021-10-26 720-861 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F GEORGETOWN CO
2021-10-26 725-265 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-10-26 737-386 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LAMPASAS TX
2021-10-26 742-888 not yet reported which blocks → ISP Telecom Inc. 4727 Pelham —
2021-10-26 762-304 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BLUE RIDGE GA
2021-10-26 769-270 0–9 XXXall 10 · 5 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 FOREST MS

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.