NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 918
SOUTHWESTERN BELL 236
NEW CINGULAR WIRELESS PCS, LLC - IL 93
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 50
T-MOBILE USA, INC. 49
VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 36
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
— 918-431 not yet reported which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-432 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 KIOWA OK
— 918-433 not yet reported which blocks → SHIDLER TEL. CO. 2023 GRAINOLA OK
— 918-434 not yet reported which blocks → SALINA-SPAVINAW TEL. CO. 2022 SALINA OK
— 918-435 not yet reported which blocks → GRAND TEL. CO., INC. 1994 DISNEY OK
— 918-436 3XXX4XXX5XXX6XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 POCOLA OK
— 918-437 6XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-438 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-439 6XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-440 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 BARTLESVL OK
— 918-441 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 MUSKOGEE OK
— 918-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-443 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CLAREMORE OK
— 918-445 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-446 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-447 1XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-448 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 WILBURTON OK
— 918-449 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-450 not yet reported which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-451 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-452 not yet reported which blocks → CROSS TEL. CO. 1985 LONGTOWN OK
— 918-453 3XXX6XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-454 not yet reported which blocks → CIMARRON TEL. CO. 1982 MARAMEC OK
— 918-455 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-456 not yet reported which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-457 0XXX6XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-458 not yet reported which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-459 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-460 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-461 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-462 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 SNUGHARBOR OK
— 918-463 not yet reported which blocks → CROSS TEL. CO. 1985 WARNER OK
— 918-464 not yet reported which blocks → CROSS TEL. CO. 1985 WEBBERSFLS OK
— 918-465 none assigned yet which blocks → SOUTHWESTERN BELL 9533 WILBURTON OK
— 918-466 not yet reported which blocks → OKLATEL COMMUNICATIONS, INC. 2013 HITCHITA OK
— 918-467 1XXX2XXX5XXX7XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 DELAWARE OK
— 918-468 not yet reported which blocks → TOTAH COMMUNICATIONS, INC. 2030 LENAPAH OK
— 918-469 not yet reported which blocks → CROSS TEL. CO. 1985 QUINTON OK
— 918-470 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 MCALESTER OK
— 918-471 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 WILBURTON OK
— 918-472 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BOYNTON OK
— 918-473 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 CHECOTAH OK
— 918-474 not yet reported which blocks → OKLATEL COMMUNICATIONS, INC. 2013 COUNCIL HL OK
— 918-475 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ALLUWE OK
— 918-476 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF OKLAHOMA COMPANY 1981 CHOUTEAU OK
— 918-477 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-478 0XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FORTGIBSON OK
— 918-479 not yet reported which blocks → SALINA-SPAVINAW TEL. CO. 2022 LOCUST GRV OK
— 918-481 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-482 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 HASKELL OK

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.