NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 580
ONVOY, LLC - OK 11
NEW CINGULAR WIRELESS PCS, LLC - IL 7
TELNYX LLC 1
T-MOBILE USA, INC. 1
OPENTACT INC. 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-08-15 580-565-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KINGSTON OK
2011-08-15 580-633-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ELDORADO OK
2011-08-15 580-648-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OLUSTEE OK
2011-08-15 580-668-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WILSON OK
2011-08-15 580-706-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MANGUM OK
2011-08-15 580-725-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BILLINGS OK
2011-08-15 580-751-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ROCKY OK
2011-08-15 580-845-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUPELO OK
2011-08-15 580-857-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ALLEN OK
2011-08-15 580-937-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WAPANUCKA OK
2011-08-04 580-480-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ALTUS OK
2011-08-04 580-706-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 MANGUM OK
2011-07-26 580-730-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-07-13 580-280-4XXX 4000–4999Assigned FIDELITY CABLEVISION, LLC 302F LAWTON OK
2011-07-08 580-775-6XXX 6000–6999Assigned UNITED STATES CELLULAR - OK 6272 DURANT OK
2011-06-21 580-340-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARDMORE OK
2011-06-21 580-706-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 MANGUM OK
2011-06-10 580-713-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-06-07 580-453-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 ADA OK
2011-05-27 580-682-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOBART OK
2011-05-27 580-791-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATONGA OK
2011-05-18 580-379-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ALTUS OK
2011-05-18 580-713-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAWTON OK
2011-05-18 580-743-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C HUGO OK
2011-05-18 580-745-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C DURANT OK
2011-05-18 580-798-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ARDMORE OK
2011-05-18 580-816-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WEATHERFD OK
2011-05-17 580-216-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK
2011-05-17 580-514-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-05-17 580-514-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-05-17 580-585-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-05-17 580-585-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-05-17 580-736-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUNCAN OK
2011-05-09 580-713-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-04-22 580-350-1XXX 1000–1999Assigned WICHITA ONLINE, INC. - OK 258F LAWTON OK
2011-04-11 580-579-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 DURANT OK
2011-04-08 580-339-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELK CITY OK
2011-04-06 580-693-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 COMANCHE OK
2011-03-23 580-372-6XXX 6000–6999Assigned UNITED STATES CELLULAR - OK 6272 HUGO OK
2011-03-21 580-352-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 PONCA CITY OK
2011-03-21 580-647-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-03-10 580-339-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ELK CITY OK
2011-03-04 580-280-2XXX 2000–2999Assigned FIDELITY CABLEVISION, LLC 302F LAWTON OK
2011-03-03 580-215-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAWTON OK
2011-03-02 580-278-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ENID OK
2011-02-17 580-706-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 MANGUM OK
2011-02-09 580-699-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-02-04 580-634-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 DURANT OK
2011-01-24 580-453-9XXX 9000–9999Assigned ONVOY, LLC - OK 409F ADA OK
2011-01-11 580-215-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAWTON OK

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.