NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-02-07 501-746 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRYANTCGVL AR
2022-02-07 567-378 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CHESTERVL OH
2022-02-07 567-462 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLYDE OH
2022-02-07 567-624 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOWLNGGREN OH
2022-02-07 580-499 0XXX1XXX4XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C MANGUM OK
2022-02-07 582-453 0XXX1XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MAHAFFEY PA
2022-02-07 667-942 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ABERDEEN MD
2022-02-07 743-746 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J WESTFIELD NC
2022-02-07 747-463 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANOGAPARK CA
2022-02-07 774-632 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TAUNTON MA
2022-02-07 774-635 0XXX1XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTHBDG MA
2022-02-07 839-264 1XXX2XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIDGEWAY SC
2022-02-07 839-826 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BEECH IS SC
2022-02-07 839-866 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANITEVL SC
2022-02-07 845-716 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C ESOPUS NY
2022-02-07 848-433 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAHWAY NJ
2022-02-07 848-674 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKEWOOD NJ
2022-02-07 857-466 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HYDE PARK MA
2022-02-07 865-449 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J KNOXVILLE TN
2022-02-07 930-262 0XXX1XXX8XXX9XXX which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F TERREHAUTE IN
2022-02-07 940-494 4XXX which blocks → TWILIO INTERNATIONAL, INC. 506J WICHITAFLS TX
2022-02-07 956-674 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LOSFRESNOS TX
2022-02-07 956-675 8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LYFORD TX
2022-02-07 986-542 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J MONTEVIEW ID
2022-02-04 223-362 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWPORT PA
2022-02-04 223-966 0XXX1XXX2XXX3XXX6XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RICHFIELD PA
2022-02-04 231-405 0XXX5XXX which blocks → ONVOY, LLCV - MI 543C ALDEN MI
2022-02-04 231-406 0XXX1XXX5XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C FALMOUTH MI
2022-02-04 231-407 0XXX7XXX which blocks → ONVOY, LLCV - MI 543C MECOSTA MI
2022-02-04 254-903 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 RANGER TX
2022-02-04 276-234 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WILLIAMSML VA
2022-02-04 276-268 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BRISTOL VA
2022-02-04 341-215 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2022-02-04 364-216 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RADCLIFF KY
2022-02-04 414-309 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2022-02-04 417-506 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SPRINGFLD MO
2022-02-04 430-294 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TEXARKANA TX
2022-02-04 434-866 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTH HILL VA
2022-02-04 458-987 1XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GILCHRIST OR
2022-02-04 531-280 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LINCOLN NE
2022-02-04 534-209 4XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SPRINGLAKE WI
2022-02-04 534-263 0XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILL CREEK WI
2022-02-04 551-866 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLIFFSIDE NJ
2022-02-04 567-373 0XXX3XXX7XXX · 2 holders which blocks → ONVOY, LLC - OH 464C SPENCERVL OH
2022-02-04 567-375 0XXX1XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - OH 464C WILSHIWREN OH
2022-02-04 579-521 not yet reported which blocks → Fibernetics Corporation 464D Eastman —
2022-02-04 579-522 not yet reported which blocks → Fibernetics Corporation 464D Frelighsburg —
2022-02-04 579-523 not yet reported which blocks → Fibernetics Corporation 464D Mansonville —
2022-02-04 579-524 not yet reported which blocks → Fibernetics Corporation 464D St-Paul-D'Abbotsford —
2022-02-04 585-873 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CALEDONIA NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.