NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
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
2018-09-26 571-397 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-09-26 571-634 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2018-09-26 571-685 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-09-26 587-522 not yet reported which blocks → Videotron Ltd. 383F Coaldale —
2018-09-26 587-821 not yet reported which blocks → Videotron Ltd. 383F Lethbridge —
2018-09-26 680-204 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NATURALBDG NY
2018-09-26 719-401 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F PEYTON CO
2018-09-26 803-871 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F SUMMERTON SC
2018-09-26 845-846 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NARROWSBG NY
2018-09-26 947-210 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 PONTIAC MI
2018-09-26 959-207 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F COLCHESTER CT
2018-09-25 231-310 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C FALMOUTH MI
2018-09-25 236-560 not yet reported which blocks → Videotron Ltd. 383F Aspen Park —
2018-09-25 256-692 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H HUNTSVILLE AL
2018-09-25 343-315 not yet reported which blocks → Videotron Ltd. 383F Brighton —
2018-09-25 431-720 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Brandon —
2018-09-25 480-536 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2018-09-25 484-613 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F LEHIGHTON PA
2018-09-25 517-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C SUNFIELD MI
2018-09-25 531-225 0–9 XXXall 10 · 3 holders which blocks → AIRUS, INC. - NE 478H OMAHA NE
2018-09-25 534-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C WAUPACA WI
2018-09-25 581-860 not yet reported which blocks → Videotron Ltd. 8306 Saint-Bernard-de-Dorchester —
2018-09-25 581-861 not yet reported which blocks → Videotron Ltd. 8306 Saint-Patrice-de-Beaurivage —
2018-09-25 657-366 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E YORBALINDA CA
2018-09-25 661-515 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HI VISTA CA
2018-09-25 734-600 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C NEWPORT MI
2018-09-25 774-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2018-09-25 810-818 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C MONTROSE MI
2018-09-25 862-331 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWARK NJ
2018-09-25 878-309 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F GREENSBURG PA
2018-09-25 909-616 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2018-09-25 984-241 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F CARY NC
2018-09-25 989-589 0XXX1XXX2XXX5XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C CARO MI
2018-09-24 208-204 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F MELBA ID
2018-09-24 313-306 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2018-09-24 320-840 0XXX7XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ALBANY MN
2018-09-24 339-220 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRYANTVL MA
2018-09-24 343-260 not yet reported which blocks → TELUS Mobility 8303 Brockville —
2018-09-24 385-276 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2018-09-24 385-280 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2018-09-24 385-281 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2018-09-24 407-726 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KISSIMMEE FL
2018-09-24 561-421 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WPALMBEACH FL
2018-09-24 571-396 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2018-09-24 579-593 not yet reported which blocks → TELUS Mobility 8303 Joliette —
2018-09-24 581-859 not yet reported which blocks → Videotron Ltd. 8306 Vallee-Jonction —
2018-09-24 610-890 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E AVONDALE PA
2018-09-24 680-202 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E CANASTOTA NY
2018-09-24 709-355 not yet reported which blocks → Bragg Communications Inc. 4878 Western Bay —
2018-09-24 709-372 not yet reported which blocks → Bragg Communications Inc. 4878 Happy Valley - Goose Bay —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.