NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2016-11-08 559-832-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-11-08 559-832-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-11-03 559-330-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2016-10-26 559-574-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PARLIER CA
2016-10-26 559-837-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TULARE CA
2016-10-18 559-207-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CLOVIS CA
2016-10-17 559-538-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2016-10-13 559-207-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 CLOVIS CA
2016-10-12 559-207-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2016-10-05 559-538-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2016-10-05 559-601-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2016-10-03 559-413-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HANFORD CA
2016-10-03 559-413-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C HANFORD CA
2016-09-23 559-216-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRESNO CA
2016-09-23 559-216-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2016-09-23 559-792-5XXX 5000–5999Assigned METROPCS, INC. 5562 PORTERVL CA
2016-09-14 559-386-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AVENAL CA
2016-09-14 559-578-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLOVIS CA
2016-09-13 559-216-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2016-09-13 559-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2016-09-13 559-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2016-09-13 559-371-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-08 559-205-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2016-09-01 559-207-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2016-09-01 559-744-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPRINGVL CA
2016-09-01 559-744-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPRINGVL CA
2016-08-30 559-205-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VISALIA CA
2016-08-30 559-371-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-08-30 559-371-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-08-30 559-837-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TULARE CA
2016-08-29 559-546-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANGER CA
2016-08-29 559-854-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PORTERVL CA
2016-08-26 559-461-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SEQUOIA CA
2016-08-26 559-464-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TERRABELLA CA
2016-08-26 559-770-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2016-08-25 559-214-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-08-25 559-214-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-08-25 559-216-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2016-08-24 559-242-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MENDOTA CA
2016-08-24 559-330-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MADERA CA
2016-08-24 559-601-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CARUTHERS CA
2016-08-24 559-632-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERDALE CA
2016-08-24 559-655-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MENDOTA CA
2016-08-24 559-796-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HANFORD CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.