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 805
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
2015-04-07 805-678-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 POINT MUGU CA
2014-12-05 805-776-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 MORRO BAY CA
2011-03-11 805-324-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA CA
2009-10-22 805-326-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2009-10-22 805-326-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-09-26 805-617-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA CA
2007-09-26 805-679-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA CA
2007-03-01 805-333-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2007-03-01 805-333-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PASOROBLES CA
2006-05-01 805-567-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 GAVIOTA CA
2004-08-18 805-617-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA CA
2002-04-26 805-679-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA CA
2002-04-26 805-679-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANBARBARA 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.