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 858
TWC IP ENABLED SERVICES, LLC 67
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
2016-08-26 858-280-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2016-08-18 858-329-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2016-05-18 858-203-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2016-05-02 858-299-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2016-03-07 858-276-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2016-02-19 858-203-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2016-01-19 858-267-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2015-09-29 858-798-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2015-09-17 858-732-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2015-08-24 858-987-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2015-07-29 858-261-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2015-07-29 858-265-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2015-05-21 858-247-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2015-04-22 858-432-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2015-01-13 858-247-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2013-06-06 858-256-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2013-06-06 858-263-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2013-04-22 858-256-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2013-04-22 858-263-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2013-04-22 858-324-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOPNQTS CA
2013-04-22 858-369-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2013-04-22 858-649-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2013-04-22 858-771-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOSANFE CA
2013-04-22 858-800-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2013-04-22 858-883-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K POWAY CA
2012-06-20 858-381-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOSANFE CA
2012-06-01 858-900-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2012-03-12 858-230-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2012-03-12 858-800-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2012-03-07 858-737-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2012-03-01 858-432-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2011-09-30 858-925-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2011-06-17 858-255-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2011-03-11 858-240-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOPNQTS CA
2011-03-11 858-999-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2011-03-08 858-433-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2009-09-11 858-705-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2009-06-25 858-461-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2008-09-11 858-836-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2008-09-11 858-836-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2008-08-08 858-935-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2008-07-16 858-750-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2008-07-16 858-750-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2008-02-15 858-240-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOPNQTS CA
2007-12-03 858-598-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2007-12-03 858-598-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2007-11-09 858-246-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-11-09 858-246-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-09-06 858-521-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2007-09-06 858-521-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO 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.