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 539
NEW CINGULAR WIRELESS PCS, LLC - IL 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
2023-10-16 539-291 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUFFALOVLY OK
2023-07-12 539-294 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OK 409F PAWNEE OK
2023-02-17 539-273 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MUSKOGEE OK
2023-01-19 539-379 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - OK 409F COLLINSVL OK
2022-12-16 539-309 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H SAPULPA OK
2022-12-15 539-359 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → ONVOY, LLC - OK 409F NOWATA OK
2022-12-15 539-390 0XXX1XXX2XXX3XXX8XXX · 2 holders which blocks → ONVOY, LLC - OK 409F MULDROW OK
2022-10-27 539-812 0–9 XXXall 10 · 5 holders which blocks → PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC. 235C TULSA OK
2022-10-19 539-287 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C YALE OK
2022-04-29 539-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MCALESTER OK
2022-03-31 539-270 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ENTERPRISE OK
2022-03-31 539-274 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 LONGTOWN OK
2022-03-31 539-285 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 KEOTA OK
2022-03-31 539-288 7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 MCCURTAIN OK
2022-03-31 539-339 7XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 KEEFETON OK
2022-03-31 539-398 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 WARNER OK
2022-03-29 539-283 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
2022-03-28 539-295 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TAHLEQUAH OK
2022-03-24 539-284 0XXX2XXX5XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F CHECOTAH OK
2022-03-15 539-426 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PRYOR OK
2022-03-01 539-967 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BROKENARRW OK
2022-02-24 539-527 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SAND SPG OK
2022-02-24 539-937 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VINITA OK
2022-02-23 539-281 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2022-02-11 539-280 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F HOMINY OK
2022-01-18 539-276 0XXX2XXX7XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CEDARS OK
2022-01-13 539-546 3XXX which blocks → TON80 COMMUNICATIONS, LLC 516J BURBANK OK
2022-01-13 539-837 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J AGRA OK
2022-01-05 539-275 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OKEMAH OK
2022-01-05 539-278 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EUFAULA OK
2022-01-05 539-279 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F AVANT OK
2022-01-05 539-282 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
2022-01-05 539-357 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BARTLESVL OK
2022-01-04 539-272 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OILTON OK
2021-12-21 539-271 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TULSA OK
2021-12-14 539-260 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2021-12-14 539-277 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F COWETA OK
2021-12-09 539-268 0XXX1XXX8XXX · 3 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H SKIATOOK OK
2021-12-09 539-289 0XXX1XXX7XXX8XXX · 4 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H DRUMRIGHT OK
2021-11-18 539-267 0XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F CHELSEA OK
2021-11-18 539-300 0XXX1XXX3XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H WESTVILLE OK
2021-11-15 539-263 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F HENRYETTA OK
2021-11-15 539-264 0XXX1XXX2XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F KIEFER OK
2021-11-05 539-261 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F SOCOFFEYVL OK
2021-09-24 539-351 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLAYTON OK
2021-09-22 539-258 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUFFALOVLY OK
2021-09-17 539-259 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NASHOBA OK
2021-09-16 539-256 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALBION OK
2021-09-13 539-399 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J TULSA OK
2021-09-13 539-599 5XXX9XXX · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J WATTS 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.