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
2019-08-21 380-207 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C REYNOLDSBG OH
2019-08-21 438-278 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-08-21 438-279 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-08-21 469-679 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ENNIS TX
2019-08-21 469-686 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2019-08-21 559-414 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CORCORAN CA
2019-08-21 639-477 not yet reported which blocks → ISP Telecom Inc. 4727 Regina —
2019-08-21 845-749 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAUGERTIES NY
2019-08-21 845-755 1XXX which blocks → EXIANT COMMUNICATIONS LLC 114J POUGHKEPSI NY
2019-08-20 206-537 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-08-20 239-296 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NAPLES FL
2019-08-20 314-697 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-08-20 406-418 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MT 453F COOKE CITY MT
2019-08-20 406-501 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MT 453F WHITEHALL MT
2019-08-20 406-804 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MT 453F GARDINER MT
2019-08-20 484-820 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F CATASAUQUA PA
2019-08-20 507-608 0XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MN 184D HERON LAKE MN
2019-08-20 507-652 0XXX1XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → ONVOY, LLC - MN 184D KELLOGG MN
2019-08-20 507-705 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - MN 184D LAMBERTON MN
2019-08-20 507-707 0XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MN 184D LEOTA MN
2019-08-20 507-708 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MN 184D LEWISVILLE MN
2019-08-20 507-709 0XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - MN 184D REDWOODFLS MN
2019-08-20 507-713 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MN 184D WILMONT MN
2019-08-20 571-621 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2019-08-20 651-349 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - MN 184D WABASHA MN
2019-08-20 814-478 0–9 XXXall 10 · 6 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 EBENSBURG PA
2019-08-20 904-532 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2019-08-19 346-390 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 BARKER TX
2019-08-19 346-391 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SUGAR LAND TX
2019-08-19 346-392 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SATSUMA TX
2019-08-19 346-393 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 STAFFORD TX
2019-08-19 346-394 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CHANNELVW TX
2019-08-19 480-637 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2019-08-19 616-352 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND RPDS MI
2019-08-19 669-296 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-08-19 773-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHICGOZN03 IL
2019-08-19 878-879 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E NEWKNSNGTN PA
2019-08-19 949-615 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRABUCO CA
2019-08-16 234-432 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C AURORA OH
2019-08-16 417-444 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SPRINGFLD MO
2019-08-16 438-273 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-08-16 667-270 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ANNAPOLIS MD
2019-08-16 719-416 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - CO 026D BRANSON CO
2019-08-16 719-437 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D PEYTON CO
2019-08-16 719-515 3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - CO 026D LA JARA CO
2019-08-16 720-664 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D ALLNSPKLYN CO
2019-08-16 720-679 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D GEORGETOWN CO
2019-08-16 720-713 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CO 026D LONGMONT CO
2019-08-16 743-233 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SUMMERFLD NC
2019-08-16 825-515 not yet reported which blocks → TELUS 8084 Wabasca —

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.