NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 567
8X8, INC. 1
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
2023-11-14 567-436 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOWLNGGREN OH
2023-11-07 567-435 0XXX1XXX2XXX3XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 FINDLAY OH
2023-10-05 567-433 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIMA OH
2023-09-26 567-428 2XXX which blocks → ONVOY, LLC - OH 464C PIONEER OH
2023-09-26 567-431 2XXX which blocks → ONVOY, LLC - OH 464C CRESTLINE OH
2023-09-15 567-427 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C LIMA OH
2023-09-12 567-425 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANSFIELD OH
2023-09-01 567-422 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANSFIELD OH
2023-08-24 567-421 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIMA OH
2023-08-17 567-417 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C SANDUSKY OH
2023-08-17 567-419 0XXX1XXX2XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C OAK HARBOR OH
2023-08-09 567-416 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOLEDO OH
2023-08-04 567-330 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ASHLAND OH
2023-04-21 567-415 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIMA OH
2023-03-27 567-410 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MANSFIELD OH
2023-03-14 567-403 0XXX1XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NORWALK OH
2023-03-09 567-398 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J MANSFIELD OH
2023-02-21 567-396 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J HOLLAND OH
2023-02-10 567-394 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MANSFIELD OH
2022-12-19 567-760 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H FREMONT OH
2022-12-01 567-592 3XXX which blocks → FARMERS MUTUAL TELEPHONE CO. DBA FMTC 760J NAPOLEON OH
2022-11-16 567-576 0XXX1XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → ONVOY, LLC - OH 464C ROCKFORD OH
2022-11-02 567-456 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C PERRYSBURG OH
2022-10-24 567-390 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C FINDLAY OH
2022-08-02 567-756 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H MANSFIELD OH
2022-06-29 567-389 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J TOLEDO OH
2022-06-27 567-387 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F LIMA OH
2022-05-04 567-385 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TOLEDO OH
2022-04-15 567-383 1XXX3XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MOUNT CORY OH
2022-03-17 567-379 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIMA OH
2022-03-09 567-382 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C VAN WERT OH
2022-03-04 567-446 0XXX1XXX2XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEY OH
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
2022-02-04 567-373 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
2022-02-01 567-370 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MANSFIELD OH
2022-01-27 567-737 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TIFFIN OH
2022-01-25 567-487 0XXX1XXX2XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREEN SPG OH
2022-01-25 567-639 4XXX7XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RCFLDCTBRY OH
2022-01-14 567-767 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ANTWERP OH
2022-01-13 567-374 7XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PANDORA OH
2022-01-13 567-426 0XXX3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAYNE OH
2022-01-13 567-466 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COONEY OH
2022-01-13 567-468 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J YORKSHIRE OH
2022-01-13 567-475 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITEHOUSE OH
2022-01-13 567-746 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BELLEVUE OH
2022-01-13 567-837 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAWSON OH
2022-01-11 567-291 0XXX1XXX8XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J REDHAW OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.