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
2010-06-11 559-530-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HANFORD CA
2010-06-04 559-546-1XXX 1000–1999Assigned WIDE VOICE, LLC - CA 252F SANGER CA
2010-05-27 559-201-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHOWCHILLA CA
2010-05-27 559-202-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PORTERVL CA
2010-05-27 559-315-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DINUBA CA
2010-05-27 559-366-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TULARE CA
2010-05-27 559-480-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REEDLEY CA
2010-05-26 559-429-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VISALIA CA
2010-05-26 559-429-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VISALIA CA
2010-05-26 559-472-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CLOVIS CA
2010-05-26 559-512-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-26 559-512-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-26 559-512-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-26 559-512-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-26 559-512-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-26 559-512-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-05-24 559-515-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-05-24 559-515-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-05-24 559-530-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2010-05-19 559-421-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2010-05-05 559-419-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 KINGSBURG CA
2010-05-05 559-756-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2010-04-27 559-667-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2010-04-23 559-530-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HANFORD CA
2010-04-20 559-358-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TULARE CA
2010-04-16 559-475-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2010-04-07 559-480-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REEDLEY CA
2010-04-05 559-981-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2010-03-31 559-202-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PORTERVL CA
2010-03-31 559-372-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VISALIA CA
2010-03-23 559-515-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-03-23 559-759-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2010-03-16 559-720-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-03-16 559-720-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-03-16 559-720-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2010-03-15 559-212-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2010-03-12 559-544-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PORTERVL CA
2010-03-09 559-667-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2010-03-08 559-537-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2010-03-08 559-537-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2010-03-08 559-537-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2010-03-08 559-537-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2010-03-08 559-537-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2010-03-05 559-475-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2010-03-04 559-481-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MADERA CA
2010-03-03 559-514-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2010-03-03 559-631-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TULARE CA
2010-03-03 559-847-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2010-03-02 559-676-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COARSEGOLD CA
2010-02-19 559-420-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO 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.