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 916
PACIFIC BELL 34
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
2013-09-23 916-887-0XXX 0000–0999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-1XXX 1000–1999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-2XXX 2000–2999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-3XXX 3000–3999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-4XXX 4000–4999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-5XXX 5000–5999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-6XXX 6000–6999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-7XXX 7000–7999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-8XXX 8000–8999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-9XXX 9000–9999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2010-12-13 916-877-2XXX 2000–2999Assigned PACIFIC BELL 9740 SCRM NORTH CA
2010-12-13 916-877-3XXX 3000–3999Assigned PACIFIC BELL 9740 SCRM NORTH CA
2008-07-22 916-660-7XXX 7000–7999Assigned PACIFIC BELL 9740 SO PLACER CA
2008-07-22 916-660-8XXX 8000–8999Assigned PACIFIC BELL 9740 SO PLACER CA
2008-06-26 916-660-4XXX 4000–4999Assigned PACIFIC BELL 9740 SO PLACER CA
2008-05-01 916-295-5XXX 5000–5999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-0XXX 0000–0999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-1XXX 1000–1999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-8XXX 8000–8999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-9XXX 9000–9999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-03-08 916-408-9XXX 9000–9999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-253-3XXX 3000–3999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-0XXX 0000–0999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-2XXX 2000–2999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-3XXX 3000–3999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-4XXX 4000–4999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-5XXX 5000–5999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-6XXX 6000–6999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-7XXX 7000–7999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-8XXX 8000–8999Assigned PACIFIC BELL 9740 LINCOLN CA
2003-09-23 916-543-9XXX 9000–9999Assigned PACIFIC BELL 9740 LINCOLN CA
2002-12-09 916-408-7XXX 7000–7999Assigned PACIFIC BELL 9740 LINCOLN CA
2002-12-09 916-408-8XXX 8000–8999Assigned PACIFIC BELL 9740 LINCOLN CA
2002-09-09 916-408-5XXX 5000–5999Assigned PACIFIC BELL 9740 LINCOLN 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.