NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 408
BANDWIDTH.COM CLEC, LLC - CA 411
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 287
LEVEL 3 COMMUNICATIONS, LLC - CA 262
NEW CINGULAR WIRELESS PCS, LLC 243
T-MOBILE USA, INC. 230
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
2008-09-11 408-701-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUNNYVALE CA
2008-09-09 408-402-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOS GATOS CA
2008-09-09 408-402-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LOS GATOS CA
2008-09-08 408-300-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS SOUTH CA
2008-09-08 408-770-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS NORTH CA
2008-09-08 408-770-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS NORTH CA
2008-09-03 408-624-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNJS SOUTH CA
2008-09-03 408-759-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNJS SOUTH CA
2008-09-03 408-899-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS WEST CA
2008-09-03 408-899-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS WEST CA
2008-09-03 408-899-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS WEST CA
2008-08-27 408-359-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SARATOGA CA
2008-08-25 408-353-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS GATOS CA
2008-08-19 408-300-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-08-19 408-300-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-08-19 408-300-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-08-13 408-770-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNJS NORTH CA
2008-08-13 408-770-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNJS NORTH CA
2008-08-12 408-775-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNJS NORTH CA
2008-08-12 408-775-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNJS NORTH CA
2008-08-12 408-775-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNJS NORTH CA
2008-08-12 408-775-3XXX 3000–3999Assigned METROPCS, INC. 5562 SNJS NORTH CA
2008-08-11 408-300-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS SOUTH CA
2008-08-11 408-300-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS SOUTH CA
2008-08-04 408-376-1XXX 1000–1999Assigned METROPCS, INC. 5562 CAMPBELL CA
2008-08-04 408-796-2XXX 2000–2999Assigned METROPCS, INC. 5562 CAMPBELL CA
2008-07-24 408-665-5XXX 5000–5999Assigned METROPCS, INC. 5562 GILROY CA
2008-07-09 408-759-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-07-09 408-759-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-07-09 408-759-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-07-09 408-899-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNJS WEST CA
2008-07-09 408-899-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNJS WEST CA
2008-07-09 408-899-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS WEST CA
2008-07-08 408-540-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CAMPBELL CA
2008-07-08 408-743-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SUNNYVALE CA
2008-07-03 408-613-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS SOUTH CA
2008-07-03 408-775-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2008-07-03 408-775-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2008-07-03 408-824-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2008-06-30 408-899-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2008-06-26 408-775-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNJS NORTH CA
2008-06-24 408-364-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CAMPBELL CA
2008-06-23 408-585-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNNYVALE CA
2008-06-23 408-594-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNNYVALE CA
2008-06-23 408-796-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CAMPBELL CA
2008-06-23 408-912-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2008-06-17 408-500-7XXX 7000–7999Assigned METROPCS, INC. 5562 MORGANHILL CA
2008-06-17 408-830-6XXX 6000–6999Assigned METROPCS, INC. 5562 SUNNYVALE CA
2008-06-16 408-912-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNJS SOUTH CA
2008-06-12 408-960-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNJS SOUTH 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.