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
2019-08-28 575-338 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H LA MESA NM
2019-08-28 612-441 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2019-08-28 612-474 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2019-08-28 618-470 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 COLUMBIA IL
2019-08-28 719-467 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F PUEBLO CO
2019-08-28 775-449 0XXX1XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J COTNWD CRK NV
2019-08-28 813-582 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2019-08-27 249-881 not yet reported which blocks → Rogers Communications Canada Inc. 571G Brechin —
2019-08-27 249-882 not yet reported which blocks → Rogers Communications Canada Inc. 571G Collingwood —
2019-08-27 249-883 not yet reported which blocks → Rogers Communications Canada Inc. 571G Cookstown —
2019-08-27 352-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FOREST FL
2019-08-27 361-259 0–9 XXXall 10 · 2 holders which blocks → EXIANT COMMUNICATIONS LLC 114J C CHRISTI TX
2019-08-27 365-838 not yet reported which blocks → Rogers Communications Canada Inc. 571G Caledon East —
2019-08-27 365-858 not yet reported which blocks → Rogers Communications Canada Inc. 571G Castlemore —
2019-08-27 365-868 not yet reported which blocks → Rogers Communications Canada Inc. 571G Cayuga —
2019-08-27 365-878 not yet reported which blocks → Rogers Communications Canada Inc. 571G Claremont —
2019-08-27 365-989 not yet reported which blocks → Rogers Communications Canada Inc. 571G Dunnville —
2019-08-27 386-356 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BUNNELL FL
2019-08-27 386-388 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H POMONAPARK FL
2019-08-27 409-249 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BEAUMONT TX
2019-08-27 413-312 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SPRINGFLD MA
2019-08-27 430-348 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H TELEPHONE TX
2019-08-27 515-316 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F GILMORE CY IA
2019-08-27 515-349 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F DALLAS CTR IA
2019-08-27 539-235 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J TULSA OK
2019-08-27 548-833 not yet reported which blocks → Rogers Communications Canada Inc. 571G Breslau —
2019-08-27 562-410 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORWALK CA
2019-08-27 563-276 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F WAUKON IA
2019-08-27 563-278 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F CLINTON IA
2019-08-27 571-454 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MANASSAS VA
2019-08-27 662-804 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OLIVE BRCH MS
2019-08-27 707-705 0XXX1XXX2XXX3XXX5XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VALLEYFORD CA
2019-08-27 707-802 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MIDDLETOWN CA
2019-08-27 727-766 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HUDSON FL
2019-08-27 747-279 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2019-08-27 805-977 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAN MIGUEL CA
2019-08-27 857-557 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J BOSTON MA
2019-08-27 863-758 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HAINESCITY FL
2019-08-27 863-766 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H INDIANLAKE FL
2019-08-27 864-549 0–9 XXXall 10 · 6 holders which blocks → EXIANT COMMUNICATIONS LLC 114J GREENVILLE SC
2019-08-27 908-503 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CLINTON NJ
2019-08-27 912-430 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLAXTON GA
2019-08-27 956-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MCALLEN TX
2019-08-27 956-933 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MISSION TX
2019-08-27 979-321 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BRYAN TX
2019-08-26 249-388 not yet reported which blocks → Rogers Communications Canada Inc. 571G Barrie —
2019-08-26 249-588 not yet reported which blocks → Rogers Communications Canada Inc. 571G Beaverton —
2019-08-26 365-686 not yet reported which blocks → Rogers Communications Canada Inc. 571G Beeton —
2019-08-26 365-787 not yet reported which blocks → Rogers Communications Canada Inc. 571G Bethesda —
2019-08-26 365-818 not yet reported which blocks → Rogers Communications Canada Inc. 571G Bolton —

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.