NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-09-16 346-505 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2021-09-16 346-506 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HOUSTON TX
2021-09-16 408-381 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
2021-09-16 423-696 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ROGERSVL TN
2021-09-16 424-722 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNMN SNMN CA
2021-09-16 424-866 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H REDONDO CA
2021-09-16 432-422 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J EAST HOBBS TX
2021-09-16 435-824 not yet reported which blocks → UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 1772 NEOLA UT
2021-09-16 470-682 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA NE GA
2021-09-16 470-920 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2021-09-16 478-370 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 MACON GA
2021-09-16 504-892 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J NEWORLEANS LA
2021-09-16 539-256 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALBION OK
2021-09-16 561-726 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2021-09-16 582-901 9XXX which blocks → ONVOY SPECTRUM, LLC 624H PENFIELD PA
2021-09-16 689-254 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ORLANDO FL
2021-09-16 689-255 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2021-09-16 716-530 0XXX3XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H AKRON NY
2021-09-16 725-260 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-09-16 734-596 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANN ARBOR MI
2021-09-16 762-989 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - GA 067D AUGUSTA GA
2021-09-16 785-480 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J TOPEKA KS
2021-09-16 806-801 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TAHOKA TX
2021-09-16 813-893 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2021-09-16 904-749 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2021-09-16 939-835 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 979-342 0XXX1XXX8XXX which blocks → IP HORIZON LLC 515J HEARNE TX
2021-09-16 980-371 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2021-09-15 218-607 0XXX1XXX6XXX7XXX8XXX9XXX which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F DULUTH MN
2021-09-15 279-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RSVL MAIN CA
2021-09-15 341-899 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OKLD TRNID CA
2021-09-15 437-329 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-09-15 438-462 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-09-15 509-514 0–9 XXXall 10 · 3 holders which blocks → TDS METROCOM, LLC 520K SPOKANE WA
2021-09-15 520-688 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CASAGRANDE AZ
2021-09-15 564-214 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YACOLT WA
2021-09-15 571-530 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2021-09-15 571-534 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2021-09-15 639-419 not yet reported which blocks → Fibernetics Corporation 464D Dalmeny —
2021-09-15 639-420 not yet reported which blocks → Fibernetics Corporation 464D Balgonie —
2021-09-15 672-217 not yet reported which blocks → ISP Telecom Inc. 4727 Holberg —
2021-09-15 672-218 not yet reported which blocks → ISP Telecom Inc. 4727 Jordan River —
2021-09-15 672-219 not yet reported which blocks → ISP Telecom Inc. 4727 Ocean Falls —
2021-09-15 672-220 not yet reported which blocks → ISP Telecom Inc. 4727 Pender Island —
2021-09-15 672-366 not yet reported which blocks → ISP Telecom Inc. 4727 Cortes Island —
2021-09-15 672-367 not yet reported which blocks → ISP Telecom Inc. 4727 Fulford Harbour —
2021-09-15 672-368 not yet reported which blocks → ISP Telecom Inc. 4727 Ganges —
2021-09-15 672-369 not yet reported which blocks → ISP Telecom Inc. 4727 Gold River —
2021-09-15 672-786 not yet reported which blocks → ISP Telecom Inc. 4727 Port Alice —
2021-09-15 672-787 not yet reported which blocks → ISP Telecom Inc. 4727 Port Hardy —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.