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
2014-04-25 559-747-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-04-25 559-747-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-04-24 559-258-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DEL REY CA
2014-04-24 559-481-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MADERA CA
2014-04-23 559-407-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FIREBAUGH CA
2014-04-21 559-575-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2014-04-14 559-387-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2014-04-14 559-547-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2014-04-10 559-580-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COARSEGOLD CA
2014-04-10 559-853-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PORTERVL CA
2014-04-02 559-556-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TULARE CA
2014-04-01 559-223-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHOWCHILLA CA
2014-04-01 559-536-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MADERA CA
2014-04-01 559-567-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KERMAN CA
2014-03-31 559-556-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2014-03-25 559-547-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-03-25 559-547-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-03-18 559-296-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FIREBAUGH CA
2014-03-18 559-370-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E THREERIVRS CA
2014-03-18 559-376-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TERRABELLA CA
2014-03-18 559-387-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2014-03-18 559-425-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGECOVE CA
2014-03-18 559-460-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SELMA CA
2014-03-18 559-537-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HANFORD CA
2014-03-18 559-537-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HANFORD CA
2014-03-18 559-547-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2014-03-17 559-547-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-03-17 559-547-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-03-17 559-568-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LINDSAY CA
2014-03-17 559-618-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TIVYVALLEY CA
2014-03-17 559-852-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2014-03-14 559-544-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PORTERVL CA
2014-03-11 559-387-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLOVIS CA
2014-03-11 559-547-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-03-11 559-547-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-03-11 559-644-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CARUTHERS CA
2014-03-07 559-480-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REEDLEY CA
2014-03-07 559-798-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-03-07 559-798-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-03-07 559-798-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-03-06 559-396-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-03-06 559-396-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-03-06 559-667-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VISALIA CA
2014-03-04 559-403-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2014-03-04 559-670-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HANFORD CA
2014-02-26 559-419-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E KINGSBURG CA
2014-02-26 559-715-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHOWCHILLA CA
2014-02-25 559-329-0XXX 0000–0999Assigned METROPCS, INC. 5562 TULARE CA
2014-02-25 559-329-1XXX 1000–1999Assigned METROPCS, INC. 5562 TULARE CA
2014-02-25 559-396-7XXX 7000–7999Assigned METROPCS, INC. 5562 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.