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 COMMUNICATIONS, LLC - CA 184
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
2019-12-03 805-971-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2019-08-15 805-695-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2018-11-16 805-454-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NEWBURYPRK CA
2018-06-29 805-803-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2018-02-01 805-586-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CAMARILLO CA
2017-10-04 805-743-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOMPOC CA
2017-08-10 805-554-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2017-08-10 805-554-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2017-08-10 805-722-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2016-01-05 805-834-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OXNARD CA
2015-12-17 805-506-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2015-12-02 805-905-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2015-09-10 805-329-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNLUSOBSPO CA
2015-07-24 805-396-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OXNARD CA
2015-02-27 805-724-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2014-11-25 805-586-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CAMARILLO CA
2014-11-20 805-719-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2014-08-14 805-604-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL RIO CA
2014-06-26 805-250-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNLUSOBSPO CA
2014-06-13 805-960-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALAMOS CA
2014-04-04 805-212-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VNTRA EAST CA
2014-02-11 805-883-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2014-01-22 805-623-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2013-12-17 805-944-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOMPOC CA
2013-09-26 805-591-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PASOROBLES CA
2013-09-11 805-574-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARROYOGRND CA
2013-08-26 805-804-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VNTRA CNTL CA
2013-08-01 805-914-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CAMARILLO CA
2013-07-25 805-225-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORRO BAY CA
2013-06-13 805-556-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PISMOBEACH CA
2013-06-13 805-601-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2013-06-07 805-250-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNLUSOBSPO CA
2013-05-24 805-324-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2013-03-28 805-433-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SIMIVALLEY CA
2012-12-31 805-325-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTA YNEZ CA
2012-11-12 805-220-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CARPINTRIA CA
2012-11-06 805-394-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OXNARD CA
2012-10-17 805-335-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2012-08-23 805-356-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GUADALUPE CA
2012-08-13 805-319-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2012-08-03 805-366-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OXNARD CA
2012-08-03 805-413-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2012-07-23 805-601-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2012-06-22 805-319-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2012-05-09 805-357-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2012-03-28 805-601-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2012-03-13 805-601-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 THOUSAOAKS CA
2012-02-29 805-695-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANBARBARA CA
2012-02-15 805-706-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNLUSOBSPO CA
2012-02-01 805-842-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SIMIVALLEY 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.