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 410
COMCAST IP PHONE, LLC 116
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
2025-09-03 410-214-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J RISING SUN MD
2020-09-24 410-942-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HAVREGRACE MD
2020-05-11 410-420-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BEL AIR MD
2019-06-06 410-936-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2018-05-22 410-801-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2018-03-28 410-213-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2016-12-20 410-832-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TOWSON MD
2016-11-14 410-432-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEVERNA PK MD
2016-10-24 410-684-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GLENBURNIE MD
2015-12-17 410-646-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-12-01 410-216-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2015-10-30 410-204-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ARBUTUS MD
2015-10-30 410-988-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ELLICOTTCY MD
2015-10-27 410-559-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2015-10-05 410-624-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-09-15 410-372-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TOWSON MD
2015-09-01 410-624-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-08-11 410-957-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J POCOMOKE MD
2015-07-16 410-589-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRYNPKLNCM MD
2015-07-16 410-901-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MD
2015-07-06 410-572-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2015-06-23 410-390-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2015-03-10 410-469-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-03-10 410-553-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GLENBURNIE MD
2015-03-06 410-390-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2015-03-06 410-904-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WATERLO238 MD
2014-12-02 410-943-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HURLOCK MD
2014-09-22 410-831-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2014-06-10 410-449-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SOLOMONS MD
2014-05-19 410-601-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-05-19 410-617-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-05-19 410-617-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-04-18 410-275-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CECILTON MD
2014-04-18 410-755-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARWICK MD
2014-02-07 410-589-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRYNPKLNCM MD
2014-01-31 410-413-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2013-12-18 410-656-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NORTH EAST MD
2013-09-09 410-875-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SYKESVILLE MD
2013-08-30 410-657-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PARKVILLE MD
2013-06-25 410-390-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2013-05-06 410-896-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DELMAR MD
2013-05-06 410-973-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BERLIN MD
2012-11-12 410-220-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKRIDGE MD
2012-11-12 410-449-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SOLOMONS MD
2012-11-08 410-497-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J PARKVILLE MD
2012-10-30 410-680-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ELLICOTTCY MD
2012-08-21 410-874-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ODENTON MD
2012-06-25 410-344-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHASE MD
2012-05-09 410-670-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EDGEWOOD MD
2012-05-02 410-571-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD

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.