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 810
COMCAST IP PHONE, LLC 96
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
2023-06-29 810-642-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SMITHS CRK MI
2023-03-29 810-261-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J RANKIN MI
2023-03-02 810-331-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J ALMONT MI
2022-09-19 810-316-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2022-09-19 810-316-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2022-09-19 810-440-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLIMTMORRS MI
2022-09-19 810-640-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLIMTMORRS MI
2021-09-10 810-284-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J LAPEER MI
2021-09-09 810-842-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J IMLAY CITY MI
2021-06-28 810-281-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MI
2020-12-17 810-788-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J YALE MI
2020-12-14 810-645-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PT SANILAC MI
2020-12-03 810-881-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J PECK MI
2020-11-24 810-657-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CARSONVL MI
2020-11-24 810-682-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SANDUSKY MI
2020-11-23 810-442-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DECKERVL MI
2020-11-23 810-475-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROWN CITY MI
2020-11-23 810-669-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CAPAC MI
2020-04-01 810-878-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CROSWELL MI
2017-06-16 810-202-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J FLUSHING MI
2016-11-22 810-432-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PORT HURON MI
2016-10-26 810-321-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JEDDO MI
2016-10-26 810-498-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2016-09-28 810-484-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2016-09-21 810-206-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2016-03-15 810-337-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2015-10-01 810-285-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2015-09-30 810-671-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ALGONAC MI
2015-07-28 810-289-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ST CLAIR MI
2015-07-01 810-662-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PORT HURON MI
2015-06-16 810-285-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2015-05-15 810-634-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEWLOTHROP MI
2015-03-06 810-676-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MARINECITY MI
2014-10-01 810-775-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2014-09-18 810-221-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2014-01-16 810-339-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2014-01-14 810-746-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J HARTLAND MI
2013-12-19 810-216-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PORT HURON MI
2013-11-27 810-368-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLIMTMORRS MI
2013-09-10 810-228-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2013-08-14 810-603-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2013-06-24 810-328-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ST CLAIR MI
2013-06-24 810-522-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2013-06-06 810-866-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2011-11-09 810-671-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ALGONAC MI
2011-10-10 810-391-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2011-09-28 810-258-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RANKIN MI
2010-09-01 810-584-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2008-11-21 810-412-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DAVISON MI
2008-10-31 810-644-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SWARTZ CRK MI

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.