NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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
2013-11-21 559-369-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2013-11-21 559-374-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2013-11-21 559-804-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2013-11-12 559-334-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISALIA CA
2013-11-12 559-334-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISALIA CA
2013-11-12 559-339-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PORTERVL CA
2013-11-06 559-400-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2013-11-01 559-797-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2013-10-31 559-387-1XXX 1000–1999Assigned PACIFIC BELL 9740 CLOVIS CA
2013-10-31 559-387-2XXX 2000–2999Assigned PACIFIC BELL 9740 CLOVIS CA
2013-10-31 559-387-3XXX 3000–3999Assigned PACIFIC BELL 9740 CLOVIS CA
2013-10-31 559-400-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2013-10-29 559-329-4XXX 4000–4999Assigned METROPCS, INC. 5562 TULARE CA
2013-10-29 559-645-8XXX 8000–8999Assigned METROPCS, INC. 5562 MADERA CA
2013-10-29 559-991-3XXX 3000–3999Assigned METROPCS, INC. 5562 TULARE CA
2013-10-22 559-400-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2013-10-22 559-400-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRESNO CA
2013-10-21 559-374-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2013-10-18 559-909-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2013-10-18 559-909-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2013-10-15 559-391-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REEDLEY CA
2013-10-15 559-399-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANGER CA
2013-10-15 559-424-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MENDOTA CA
2013-10-15 559-460-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SELMA CA
2013-10-15 559-525-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANJOAQUIN CA
2013-10-15 559-536-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MADERA CA
2013-10-15 559-634-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F KINGSBURG CA
2013-10-15 559-763-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HURON CA
2013-10-15 559-797-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CLOVIS CA
2013-10-15 559-813-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FOWLER CA
2013-10-15 559-823-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ORANGECOVE CA
2013-10-15 559-847-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PARLIER CA
2013-10-15 559-933-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FIREBAUGH CA
2013-10-15 559-961-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F COALINGA CA
2013-10-14 559-382-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MENDOTA CA
2013-10-08 559-332-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SQUAW VLY CA
2013-10-08 559-748-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EXETER CA
2013-10-04 559-400-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2013-10-04 559-400-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2013-10-01 559-239-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LINDSAY CA
2013-09-25 559-374-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2013-09-20 559-900-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2013-09-18 559-374-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FRESNO CA
2013-09-06 559-544-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTERVL CA
2013-08-30 559-644-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2013-08-20 559-400-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2013-08-19 559-385-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2013-08-19 559-385-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2013-08-19 559-385-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2013-08-19 559-400-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 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.