NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
— 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 4XXX5XXX6XXX7XXX9XXX · 5 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
— 405-401 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-406 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
— 405-408 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-409 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-410 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 405-412 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-413 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-414 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-415 5XXX6XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 OKLA CITY OK
— 405-416 0XXX3XXX4XXX5XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 OKLA CITY OK
— 405-417 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-418 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BRITTON OK
— 405-419 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-422 0XXX5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL RENO OK
— 405-424 8XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-425 9XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-426 0XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-427 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-433 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CASHION OK
— 405-440 3XXX which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-444 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 PAULS VLY OK
— 405-447 5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 NORMAN OK
— 405-448 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICKASHA OK
— 405-449 0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 WAYNE OK
— 405-452 0XXX2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WETUMKA OK
— 405-453 0XXX2XXX5XXX8XXX · 4 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 VERDEN OK
— 405-454 0XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HARRAH OK
— 405-455 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MIDWEST CY OK
— 405-457 not yet reported which blocks → HINTON TEL. CO. OF HINTON OK, INC. 1995 LOOKEBA OK
— 405-459 0XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 POCASSET OK
— 405-460 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-462 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 BRADLEY OK
— 405-463 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-466 0XXX5XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 GUTHRIE OK
— 405-469 not yet reported which blocks → CHICKASAW TEL. CO. 1980 ROSEDALE OK
— 405-470 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BETHANY OK
— 405-471 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-472 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-473 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-474 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-475 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-476 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-478 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-483 0XXX1XXX2XXX3XXX8XXX9XXX · 6 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 UNION CITY OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.