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 413
COMCAST IP PHONE, LLC 110
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
2022-08-04 413-255-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRANBY MA
2022-06-28 413-558-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WARREN MA
2021-09-09 413-614-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J NORTHAMPTN MA
2021-09-09 413-614-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J NORTHAMPTN MA
2021-06-10 413-616-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J OTIS MA
2021-06-07 413-360-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SANDISFLD MA
2020-11-20 413-223-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD MA
2020-11-20 413-223-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD MA
2020-10-19 413-368-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-08-06 413-415-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J AMHRSTFKLN MA
2020-06-29 413-414-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HINSDALE MA
2019-10-10 413-373-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CUMMINGTON MA
2019-10-07 413-471-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHESTERFLD MA
2019-02-28 413-750-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2018-10-16 413-685-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON MA
2018-08-30 413-266-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2018-08-10 413-287-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RUSSELL MA
2018-04-25 413-238-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WORTHINGTN MA
2018-04-25 413-623-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BECKET MA
2018-04-25 413-853-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ASHFIELD MA
2018-04-12 413-266-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2018-02-02 413-213-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BELCHERTN MA
2017-11-15 413-266-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2017-06-12 413-409-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HOLYOKE MA
2016-09-27 413-507-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2016-03-18 413-417-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2016-02-05 413-417-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2015-10-08 413-333-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2015-09-18 413-935-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LONGMEADOW MA
2015-07-23 413-893-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MONSON MA
2015-07-21 413-676-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TURNERSFLS MA
2015-06-26 413-333-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2015-03-06 413-350-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SO DEERFLD MA
2014-12-01 413-324-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PALMER MA
2014-09-17 413-322-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J HOLYOKE MA
2014-08-14 413-570-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NORTHAMPTN MA
2014-06-27 413-223-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD MA
2014-05-19 413-310-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2014-05-19 413-310-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2014-03-28 413-642-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WESTFIELD MA
2013-11-26 413-317-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2013-08-20 413-372-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2012-11-15 413-538-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOLYOKE MA
2012-11-06 413-992-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J AMHERST MA
2012-10-26 413-372-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2012-05-07 413-831-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SOUTHWICK MA
2012-04-19 413-277-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WARE MA

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.