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 424
PACIFIC BELL 31
PACIFIC BELL (COMPETITIVE) 4
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
2013-11-26 424-338-1XXX 1000–1999Assigned PACIFIC BELL 9740 CMTN CMTN CA
2013-11-26 424-338-2XXX 2000–2999Assigned PACIFIC BELL 9740 CMTN CMTN CA
2013-09-12 424-328-2XXX 2000–2999Assigned PACIFIC BELL 9740 LOMITA CA
2012-02-14 424-314-0XXX 0000–0999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-1XXX 1000–1999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-2XXX 2000–2999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-3XXX 3000–3999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-4XXX 4000–4999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-5XXX 5000–5999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-6XXX 6000–6999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-7XXX 7000–7999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-8XXX 8000–8999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-314-9XXX 9000–9999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-0XXX 0000–0999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-1XXX 1000–1999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-2XXX 2000–2999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-3XXX 3000–3999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-4XXX 4000–4999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-5XXX 5000–5999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-6XXX 6000–6999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-7XXX 7000–7999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-8XXX 8000–8999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2012-02-14 424-315-9XXX 9000–9999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2011-04-27 424-251-7XXX 7000–7999Assigned PACIFIC BELL 9740 LOMITA CA
2010-12-15 424-231-9XXX 9000–9999Assigned PACIFIC BELL (COMPETITIVE) 7480 SNMN SNMN CA
2010-08-25 424-212-5XXX 5000–5999Assigned PACIFIC BELL (COMPETITIVE) 7480 REDONDO CA
2008-09-02 424-646-5XXX 5000–5999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2008-09-02 424-646-6XXX 6000–6999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2008-09-02 424-646-7XXX 7000–7999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2008-09-02 424-646-8XXX 8000–8999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2008-09-02 424-646-9XXX 9000–9999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2007-08-10 424-903-4XXX 4000–4999Assigned PACIFIC BELL (COMPETITIVE) 7480 REDONDO CA
2006-10-27 424-288-2XXX 2000–2999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2006-10-27 424-288-3XXX 3000–3999Assigned PACIFIC BELL 9740 BEVERLYHLS CA
2006-09-14 424-832-8XXX 8000–8999Assigned PACIFIC BELL (COMPETITIVE) 7480 W ANGELES 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.