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
2014-02-25 559-396-8XXX 8000–8999Assigned METROPCS, INC. 5562 FRESNO CA
2014-02-25 559-536-1XXX 1000–1999Assigned METROPCS, INC. 5562 MADERA CA
2014-02-25 559-596-8XXX 8000–8999Assigned METROPCS, INC. 5562 DINUBA CA
2014-02-05 559-387-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CLOVIS CA
2014-01-30 559-997-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEMOORE CA
2014-01-23 559-462-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SPRINGVL CA
2014-01-22 559-396-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2014-01-22 559-396-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2014-01-21 559-418-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HURON CA
2014-01-07 559-396-0XXX 0000–0999Assigned METROPCS, INC. 5562 FRESNO CA
2014-01-07 559-396-1XXX 1000–1999Assigned METROPCS, INC. 5562 FRESNO CA
2014-01-07 559-396-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRESNO CA
2014-01-07 559-821-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 COALINGA CA
2013-12-16 559-350-9XXX 9000–9999Assigned METROPCS, INC. 5562 PORTERVL CA
2013-12-16 559-536-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2013-12-09 559-634-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C KINGSBURG CA
2013-12-05 559-580-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COARSEGOLD CA
2013-12-04 559-391-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REEDLEY CA
2013-11-26 559-235-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DUNLAP CA
2013-11-26 559-236-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRANTGROVE CA
2013-11-26 559-258-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DEL REY CA
2013-11-26 559-336-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MIRANTPHST CA
2013-11-26 559-342-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PIXLEY CA
2013-11-26 559-376-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TERRABELLA CA
2013-11-26 559-383-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AVENAL CA
2013-11-26 559-390-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ALPAUGH CA
2013-11-26 559-398-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BADGER CA
2013-11-26 559-422-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LATON CA
2013-11-26 559-423-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LEMOORE CA
2013-11-26 559-461-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SEQUOIA CA
2013-11-26 559-466-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TIPTON CA
2013-11-26 559-469-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HANFORD CA
2013-11-26 559-531-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TIVYVALLEY CA
2013-11-26 559-568-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LINDSAY CA
2013-11-26 559-597-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LEMON COVE CA
2013-11-26 559-632-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIVERDALE CA
2013-11-26 559-640-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F THREERIVRS CA
2013-11-26 559-644-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2013-11-26 559-671-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F EXETER CA
2013-11-26 559-678-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SQUAW VLY CA
2013-11-26 559-687-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TULARE CA
2013-11-26 559-725-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DINUBA CA
2013-11-26 559-744-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SPRINGVL CA
2013-11-26 559-762-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CORCORAN CA
2013-11-26 559-769-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WOODLAKE CA
2013-11-26 559-798-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VISALIA CA
2013-11-26 559-853-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PORTERVL CA
2013-11-26 559-895-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BURREL CA
2013-11-26 559-927-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F STRATFORD CA
2013-11-26 559-942-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CARUTHERS 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.