NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 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, all time — NPA 925
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 29
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
2020-03-11 925-758-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LIVERMORE CA
2014-11-10 925-379-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-05-06 925-543-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2014-03-24 925-701-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-03-24 925-701-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-03-24 925-701-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2013-08-14 925-359-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2013-04-25 925-968-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2013-03-27 925-660-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2010-05-20 925-843-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2005-11-30 925-304-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CLAYTON 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.