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
2014-10-29 559-787-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TIVYVALLEY CA
2014-10-27 559-753-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2014-10-27 559-753-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2014-10-16 559-753-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-10-16 559-753-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-10-15 559-223-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHOWCHILLA CA
2014-10-14 559-467-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2014-10-14 559-467-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2014-10-14 559-556-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2014-10-09 559-753-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-09 559-753-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-09 559-753-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-09 559-753-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-08 559-384-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BURREL CA
2014-10-03 559-342-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PIXLEY CA
2014-10-02 559-387-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2014-10-02 559-396-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-02 559-614-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-02 559-614-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-02 559-614-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-02 559-614-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-10-01 559-296-4XXX 4000–4999Assigned METROPCS, INC. 5562 FIREBAUGH CA
2014-10-01 559-382-4XXX 4000–4999Assigned METROPCS, INC. 5562 MENDOTA CA
2014-10-01 559-382-8XXX 8000–8999Assigned METROPCS, INC. 5562 MENDOTA CA
2014-09-29 559-300-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-09-29 559-429-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2014-09-29 559-556-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2014-09-26 559-231-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-09-26 559-419-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KINGSBURG CA
2014-09-26 559-575-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLOVIS CA
2014-09-26 559-598-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MADERA CA
2014-09-26 559-598-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MADERA CA
2014-09-26 559-614-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-09-26 559-670-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HANFORD CA
2014-09-26 559-726-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REEDLEY CA
2014-09-23 559-575-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2014-09-23 559-575-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2014-09-23 559-852-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HANFORD CA
2014-09-22 559-726-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REEDLEY CA
2014-09-19 559-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-09-19 559-231-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2014-09-18 559-567-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KERMAN CA
2014-09-18 559-575-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CLOVIS CA
2014-09-18 559-644-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2014-09-18 559-856-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SELMA CA
2014-09-17 559-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-09-17 559-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-09-10 559-391-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REEDLEY CA
2014-09-10 559-646-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2014-09-10 559-847-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER 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.