NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 405
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 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
— 405-340 not yet reported which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-341 not yet reported which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-342 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F ARCADIA OK
— 405-344 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 DIBBLE OK
— 405-345 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F EL RENO OK
— 405-346 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F GUTHRIE OK
— 405-347 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F HARRAH OK
— 405-348 not yet reported which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-349 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F LUTHER OK
— 405-350 not yet reported which blocks → SOUTHWESTERN BELL 9533 YUKON OK
— 405-352 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MINCO OK
— 405-353 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F MUSTANG OK
— 405-354 not yet reported which blocks → SOUTHWESTERN BELL 9533 YUKON OK
— 405-355 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F NOBLE OK
— 405-356 0XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WELLSTON OK
— 405-357 6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F WHEATLAND OK
— 405-358 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F PIEDMONT OK
— 405-359 not yet reported which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-360 not yet reported which blocks → SOUTHWESTERN BELL 9533 NORMAN OK
— 405-362 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F TUTTLE OK
— 405-364 not yet reported which blocks → SOUTHWESTERN BELL 9533 NORMAN OK
— 405-366 not yet reported which blocks → SOUTHWESTERN BELL 9533 NORMAN OK
— 405-368 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 KINGFISHER OK
— 405-370 2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-372 not yet reported which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-373 6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 PIEDMONT OK
— 405-374 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 MAUD OK
— 405-375 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 KINGFISHER OK
— 405-376 not yet reported which blocks → SOUTHWESTERN BELL 9533 MUSTANG OK
— 405-377 9XXX which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-378 1XXX2XXX4XXX5XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-379 0XXX which blocks → SOUTHWESTERN BELL 9533 HOLDENVL OK
— 405-380 1XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SEMINOLE OK
— 405-381 0XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 TUTTLE OK
— 405-382 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEMINOLE OK
— 405-383 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WANETTE OK
— 405-384 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BETHANY OK
— 405-385 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-386 not yet reported which blocks → MCLOUD TEL. CO. 2006 STELLA OK
— 405-387 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 NEWCASTLE OK
— 405-388 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-389 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F WETUMKA OK
— 405-390 7XXX which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 CHOCTAW OK
— 405-391 not yet reported which blocks → MCLOUD TEL. CO. 2006 NEWALLA OK
— 405-392 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 NEWCASTLE OK
— 405-393 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F MAUD OK
— 405-395 2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 SHAWNEE OK
— 405-396 4XXX5XXX6XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ARCADIA OK
— 405-398 not yet reported which blocks → POTTAWATOMIE TEL. CO. 2020 BOWLEGS OK
— 405-399 0XXX1XXX7XXX8XXX · 4 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 JONES OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.