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 301
COMCAST IP PHONE, LLC 108
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
2019-06-10 301-902-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z13 MD
2019-04-10 301-508-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MYERSVILLE MD
2019-03-01 301-396-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WALDORF MD
2019-03-01 301-835-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2018-10-11 301-574-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z15 MD
2017-11-29 301-228-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2017-08-21 301-347-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN2 MD
2017-07-18 301-545-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2017-04-28 301-374-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WALDORF MD
2017-03-15 301-753-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN6 MD
2016-12-30 301-347-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN2 MD
2016-12-30 301-477-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z13 MD
2016-11-16 301-810-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BUCKEYSTN MD
2016-06-24 301-383-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z14 MD
2016-06-24 301-603-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN11 MD
2016-02-09 301-348-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN11 MD
2016-01-29 301-798-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DAMASCS240 MD
2016-01-25 301-360-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2015-10-27 301-909-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2015-09-16 301-417-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2015-09-03 301-747-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN6 MD
2015-08-31 301-703-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOUNT AIRY MD
2015-08-18 301-477-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z13 MD
2015-07-30 301-433-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2015-06-23 301-732-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2015-04-02 301-417-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2015-03-19 301-316-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2015-03-03 301-494-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNG238Z15 MD
2015-02-17 301-304-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WALKERSVL MD
2015-02-17 301-682-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2014-12-02 301-851-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN4 MD
2014-09-23 301-847-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN12 MD
2014-08-22 301-978-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2014-08-07 301-969-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BRUNSWICK MD
2014-06-27 301-844-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2014-05-27 301-798-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DAMASCS240 MD
2014-02-28 301-463-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LONACONING MD
2014-02-28 301-786-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MCCOOLE MD
2013-11-27 301-569-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2013-09-10 301-288-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN12 MD
2013-09-09 301-822-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN11 MD
2013-09-06 301-732-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2013-08-30 301-366-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2013-08-23 301-539-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LA PLATA MD
2013-08-15 301-557-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2013-08-15 301-636-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2013-08-06 301-882-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NEW MARKET MD
2013-07-22 301-296-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2013-06-25 301-337-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2013-06-06 301-909-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD

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.