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 580
ONVOY, LLC - OK 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
2022-04-29 580-707 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ENID OK
2022-03-17 580-880 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALTUS OK
2022-03-17 580-990 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DUNCAN OK
2022-03-09 580-949 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ADA OK
2022-02-07 580-499 0XXX1XXX4XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C MANGUM OK
2022-01-14 580-773 3XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ORLANDO OK
2021-12-10 580-680 0XXX6XXX · 2 holders which blocks → ONVOY, LLC - OK 409F ELMOREWEST OK
2021-10-25 580-400 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LAWTON OK
2021-10-13 580-615 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F DURANT OK
2021-09-24 580-604 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RUFE OK
2021-09-20 580-601 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTIEST OK
2021-09-20 580-702 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK HILL OK
2021-09-20 580-915 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOCHATOWN OK
2021-08-31 580-804 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WOODWARD OK
2021-08-26 580-557 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TONKAWA OK
2021-07-13 580-202 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F CORDELL OK
2021-07-08 580-292 0XXX1XXX2XXX3XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OK 409F INDIAHOMA OK
2021-07-08 580-415 0XXX1XXX5XXX · 3 holders which blocks → ONVOY, LLC - OK 409F MARLAND OK
2021-07-08 580-462 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OK 409F OLUSTEE OK
2021-07-08 580-502 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → ONVOY, LLC - OK 409F WILSON OK
2021-06-29 580-390 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ELK CITY OK
2021-06-07 580-404 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F ROFF OK
2021-05-17 580-391 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADDO OK
2021-04-05 580-392 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WRIGHTCITY OK
2021-03-03 580-586 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → WICHITA ONLINE, INC. - OK 258F WAURIKA OK
2021-01-12 580-944 0XXX1XXX4XXX · 3 holders which blocks → WICHITA ONLINE, INC. - OK 258F GOTEBO OK
2020-10-26 580-720 0XXX6XXX7XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C ELGIN OK
2020-09-29 580-642 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C DURANT OK
2020-09-09 580-466 4XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H OKEENE OK
2020-09-09 580-577 5XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H CANTON OK
2020-09-09 580-899 0XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DILL CITY OK
2020-09-09 580-946 3XXX which blocks → FRACTEL, LLC 965H ROGERMILLS OK
2020-08-26 580-360 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAWTON OK
2020-05-20 580-844 0XXX5XXX8XXX9XXX · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J HITCHCOCK OK
2020-02-28 580-505 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK
2020-02-13 580-742 0XXX1XXX7XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F GERTY OK
2019-06-18 580-645 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F ADA OK
2019-04-09 580-943 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 DUNCAN OK
2019-04-08 580-501 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ADA OK
2019-04-08 580-643 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALTUS OK
2019-04-04 580-644 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ELK CITY OK
2019-04-02 580-414 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J WEATHERFD OK
2019-02-20 580-900 0XXX9XXX which blocks → TERRA NOVA TELECOM INC. 145J TUPELO OK
2019-01-24 580-800 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BLAIR OK
2018-10-31 580-344 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ADA OK
2018-06-29 580-901 0XXX9XXX · 2 holders which blocks → WINDSTREAM OKLAHOMA, INC. 1965 CANUTE OK
2017-12-08 580-691 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 CARTWRIGHT OK
2017-12-08 580-714 2XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ACHILLE OK
2017-12-08 580-733 2XXX3XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BOKCHITO OK
2017-12-08 580-942 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 COLBERT 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.