NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

22 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 559
NEW CINGULAR WIRELESS PCS, LLC 4
HD CARRIER LLC 4
EXIANT COMMUNICATIONS LLC 4
BANDWIDTH.COM CLEC, LLC - CA 4
OPENTACT INC. 2
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
2012-06-04 559-726-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 REEDLEY CA
2012-05-30 559-544-0XXX 0000–0999Assigned METROPCS, INC. 5562 PORTERVL CA
2012-05-30 559-763-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HURON CA
2012-05-29 559-395-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2012-05-29 559-580-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COARSEGOLD CA
2012-05-21 559-715-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHOWCHILLA CA
2012-05-07 559-356-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2012-04-27 559-568-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LINDSAY CA
2012-04-23 559-514-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MADERA CA
2012-04-23 559-900-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2012-04-09 559-399-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SANGER CA
2012-04-09 559-406-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DINUBA CA
2012-04-05 559-317-1XXX 1000–1999Assigned METROPCS, INC. 5562 FRESNO CA
2012-04-05 559-317-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRESNO CA
2012-04-05 559-317-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2012-04-05 559-317-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRESNO CA
2012-04-05 559-317-5XXX 5000–5999Assigned METROPCS, INC. 5562 FRESNO CA
2012-04-03 559-530-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2012-03-22 559-514-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2012-03-22 559-537-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HANFORD CA
2012-03-14 559-302-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISALIA CA
2012-03-14 559-333-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PORTERVL CA
2012-03-12 559-860-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2012-03-07 559-329-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TULARE CA
2012-03-06 559-499-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2012-03-06 559-570-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRESNO CA
2012-03-06 559-631-5XXX 5000–5999Assigned METROPCS, INC. 5562 TULARE CA
2012-03-02 559-317-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2012-02-21 559-667-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2012-02-17 559-241-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-02-17 559-248-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-02-17 559-777-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-02-17 559-981-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-01-30 559-900-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CLOVIS CA
2012-01-30 559-900-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CLOVIS CA
2012-01-25 559-792-8XXX 8000–8999Assigned METROPCS, INC. 5562 PORTERVL CA
2012-01-19 559-750-1XXX 1000–1999Assigned METROPCS, INC. 5562 VISALIA CA
2012-01-19 559-750-2XXX 2000–2999Assigned METROPCS, INC. 5562 VISALIA CA
2012-01-18 559-467-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2012-01-18 559-514-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MADERA CA
2012-01-09 559-797-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2011-12-29 559-530-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2011-12-28 559-777-0XXX 0000–0999Assigned METROPCS, INC. 5562 FRESNO CA
2011-12-28 559-777-1XXX 1000–1999Assigned METROPCS, INC. 5562 FRESNO CA
2011-12-22 559-549-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2011-12-22 559-777-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2011-12-07 559-203-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2011-12-05 559-750-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2011-12-05 559-750-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2011-11-18 559-203-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLOVIS CA

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.