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 703
COMCAST IP PHONE, LLC 128
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
2023-12-07 703-512-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2023-12-07 703-512-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2023-12-07 703-512-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2023-12-07 703-512-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2019-01-17 703-936-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2018-05-03 703-718-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2018-02-22 703-263-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2017-09-22 703-551-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LORTON VA
2017-06-22 703-420-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2017-05-19 703-223-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2017-05-08 703-712-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2017-05-08 703-817-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2017-05-08 703-817-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2017-04-26 703-223-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2017-03-31 703-827-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2017-02-01 703-718-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2017-01-20 703-866-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2016-11-18 703-443-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2016-11-08 703-420-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2016-09-14 703-721-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2015-12-30 703-429-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2014-12-01 703-291-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TRIANGLE VA
2014-09-19 703-337-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ENGLESIDE VA
2014-06-26 703-479-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2014-06-16 703-746-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-06-10 703-419-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-04-30 703-685-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-04-15 703-559-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2014-02-19 703-479-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2014-01-10 703-687-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2013-12-16 703-865-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2013-05-01 703-687-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2012-11-19 703-429-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2012-07-19 703-364-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2012-07-17 703-291-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TRIANGLE VA
2012-02-13 703-712-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2011-11-16 703-523-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-16 703-523-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-08-22 703-982-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LORTON VA
2011-02-11 703-466-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2010-10-22 703-539-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2010-10-18 703-567-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA

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.