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
2007-09-26 559-862-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLOVIS CA
2007-09-25 559-305-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REEDLEY CA
2007-09-25 559-853-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2007-09-25 559-853-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2007-09-25 559-853-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2007-09-17 559-331-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TULARE CA
2007-09-17 559-408-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-09-17 559-408-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-09-17 559-408-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-09-17 559-408-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-09-17 559-408-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-09-17 559-416-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2007-09-17 559-676-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COARSEGOLD CA
2007-09-13 559-417-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2007-09-13 559-417-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2007-09-13 559-417-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2007-09-11 559-412-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2007-09-07 559-416-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2007-09-07 559-759-1XXX 1000–1999Assigned METROPCS, INC. 5562 TULARE CA
2007-09-07 559-840-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2007-09-02 559-394-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-08-27 559-802-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L VISALIA CA
2007-08-20 559-765-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2007-08-16 559-630-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANJOAQUIN CA
2007-08-10 559-415-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HANFORD CA
2007-08-10 559-416-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2007-08-10 559-417-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2007-08-10 559-417-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2007-08-09 559-651-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2007-08-09 559-715-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CHOWCHILLA CA
2007-08-08 559-389-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-08-08 559-389-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-08-08 559-389-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-08-08 559-633-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEMOORE CA
2007-08-08 559-876-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANGER CA
2007-08-07 559-356-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2007-08-07 559-356-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PARLIER CA
2007-07-27 559-639-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HANFORD CA
2007-07-20 559-305-7XXX 7000–7999Assigned FRONTIER CALIFORNIA INC. 2319 REEDLEY CA
2007-07-18 559-416-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2007-07-17 559-403-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2007-07-16 559-412-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2007-07-02 559-475-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2007-06-29 559-305-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REEDLEY CA
2007-06-29 559-339-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2007-06-26 559-397-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DINUBA CA
2007-06-25 559-797-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2007-06-14 559-389-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 FRESNO CA
2007-06-04 559-429-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2007-05-30 559-408-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 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.