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
2012-09-12 559-517-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2012-09-12 559-517-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2012-09-12 559-750-6XXX 6000–6999Assigned METROPCS, INC. 5562 VISALIA CA
2012-09-12 559-750-9XXX 9000–9999Assigned METROPCS, INC. 5562 VISALIA CA
2012-09-10 559-666-5XXX 5000–5999Assigned METROPCS, INC. 5562 FRESNO CA
2012-09-10 559-666-7XXX 7000–7999Assigned METROPCS, INC. 5562 FRESNO CA
2012-09-10 559-666-8XXX 8000–8999Assigned METROPCS, INC. 5562 FRESNO CA
2012-09-10 559-666-9XXX 9000–9999Assigned METROPCS, INC. 5562 FRESNO CA
2012-09-10 559-997-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LEMOORE CA
2012-08-24 559-560-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2012-08-22 559-631-9XXX 9000–9999Assigned METROPCS, INC. 5562 TULARE CA
2012-08-17 559-517-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2012-08-16 559-315-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 DINUBA CA
2012-08-13 559-201-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHOWCHILLA CA
2012-08-13 559-365-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-08-13 559-365-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-08-13 559-573-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-08-13 559-573-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-08-13 559-573-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-08-09 559-425-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGECOVE CA
2012-08-08 559-500-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRESNO CA
2012-08-08 559-500-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRESNO CA
2012-08-03 559-514-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MADERA CA
2012-08-01 559-663-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CHOWCHILLA CA
2012-07-24 559-460-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SELMA CA
2012-07-20 559-666-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRESNO CA
2012-07-19 559-514-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2012-07-16 559-203-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2012-07-16 559-365-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-07-16 559-365-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRESNO CA
2012-07-16 559-429-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2012-07-16 559-467-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2012-07-13 559-369-1XXX 1000–1999Assigned WIDE VOICE, LLC - CA 252F FRESNO CA
2012-07-11 559-365-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRESNO CA
2012-07-11 559-365-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2012-07-11 559-365-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-07-11 559-365-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-07-10 559-646-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2012-06-26 559-817-0XXX 0000–0999Assigned METROPCS, INC. 5562 LEMOORE CA
2012-06-25 559-573-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 FRESNO CA
2012-06-13 559-316-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 FOWLER CA
2012-06-12 559-267-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RAYMOND CA
2012-06-12 559-573-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2012-06-04 559-316-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FOWLER CA
2012-06-04 559-317-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-06-04 559-317-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-06-04 559-317-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2012-06-04 559-546-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SANGER CA
2012-06-04 559-568-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 LINDSAY CA
2012-06-04 559-671-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 EXETER 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.