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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-01-24 580-375-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 WEATHERFD OK
2012-01-23 580-730-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2012-01-13 580-268-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARLAND OK
2011-12-28 580-277-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARDMORE OK
2011-12-28 580-278-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ENID OK
2011-12-28 580-825-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F HITCHCOCK OK
2011-12-13 580-670-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 BLACKWELL OK
2011-11-30 580-910-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 HEALDTON OK
2011-11-28 580-263-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 MADILL OK
2011-11-28 580-382-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 PONCA CITY OK
2011-11-22 580-291-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-11-22 580-291-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-11-22 580-291-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-11-22 580-956-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-11-21 580-715-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 CLINTON OK
2011-11-18 580-350-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-11-16 580-350-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-11-16 580-350-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-11-16 580-350-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-11-10 580-730-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-10-28 580-318-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ALTUS OK
2011-10-27 580-729-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 SAYRE OK
2011-10-25 580-754-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 GUYMON OK
2011-10-24 580-730-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-10-24 580-730-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2011-10-13 580-563-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BLAIR OK
2011-09-30 580-458-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAWTON OK
2011-09-30 580-786-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUNCAN OK
2011-09-28 580-799-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ELK CITY OK
2011-09-13 580-952-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HITCHCOCK OK
2011-09-09 580-278-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ENID OK
2011-09-09 580-491-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PONCA CITY OK
2011-09-09 580-730-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2011-09-01 580-798-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ARDMORE OK
2011-08-24 580-701-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ENID OK
2011-08-23 580-216-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK
2011-08-23 580-231-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ENID OK
2011-08-23 580-231-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ENID OK
2011-08-23 580-453-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADA OK
2011-08-23 580-799-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELK CITY OK
2011-08-15 580-218-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BRECKENRDG OK
2011-08-15 580-232-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CACHE OK
2011-08-15 580-264-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HEALDTON OK
2011-08-15 580-288-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KREMLIN OK
2011-08-15 580-325-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HILLSDALE OK
2011-08-15 580-329-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CARRIER OK
2011-08-15 580-345-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SOPER OK
2011-08-15 580-417-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FAIRMONT OK
2011-08-15 580-509-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ATOKA OK
2011-08-15 580-563-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BLAIR 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.