NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 818
LEVEL 3 COMMUNICATIONS, LLC - CA 224
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-05-18 818-722-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SPLV CA
2016-02-24 818-707-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AGOURA CA
2014-11-21 818-928-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PSDN LACN CA
2014-09-30 818-918-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CANOGAPARK CA
2014-09-10 818-629-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AGOURA CA
2014-06-26 818-918-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CANOGAPARK CA
2014-06-26 818-918-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CANOGAPARK CA
2014-05-23 818-860-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN BRBN CA
2014-05-02 818-853-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2014-05-01 818-946-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2014-04-10 818-721-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NORTHRIDGE CA
2014-04-03 818-946-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2014-04-03 818-946-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2014-02-28 818-927-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2014-02-24 818-722-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SPLV CA
2014-01-10 818-616-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2013-10-04 818-616-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2013-10-04 818-616-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2013-10-04 818-853-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2013-06-20 818-877-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AGOURA CA
2013-06-06 818-593-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CANOGAPARK CA
2013-05-03 818-452-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2013-04-08 818-330-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LACRSCENTA CA
2013-03-28 818-296-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2013-03-28 818-639-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SNFN CA
2013-02-01 818-462-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RESEDA CA
2012-10-12 818-638-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2012-08-03 818-962-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN SNVY CA
2012-06-22 818-435-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NORTHRIDGE CA
2012-06-22 818-465-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2012-06-22 818-482-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2012-02-23 818-538-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2012-02-23 818-643-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2012-02-10 818-839-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2012-02-10 818-925-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNLD TJNG CA
2012-02-10 818-962-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN SNVY CA
2012-02-01 818-330-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LACRSCENTA CA
2012-02-01 818-514-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RESEDA CA
2012-02-01 818-869-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN PACM CA
2012-01-30 818-963-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CANOGAPARK CA
2011-11-30 818-350-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NORTHRIDGE CA
2011-11-30 818-356-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SNFN CA
2011-11-11 818-962-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN SNVY CA
2011-10-27 818-649-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2011-10-05 818-651-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AGOURA CA
2011-08-25 818-869-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN PACM CA
2011-08-19 818-839-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2011-08-05 818-962-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN SNVY CA
2011-07-21 818-330-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LACRSCENTA CA
2011-07-21 818-639-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SNFN CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.