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 878
COMCAST IP PHONE, LLC 41
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
2023-10-26 878-287-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EVANS CITY PA
2023-05-03 878-272-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRINGDALE PA
2023-05-03 878-273-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOMER CITY PA
2023-05-01 878-262-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MARS PA
2023-02-15 878-844-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J INDIANA PA
2022-11-23 878-465-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WEXFORD PA
2022-11-23 878-465-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WEXFORD PA
2022-10-12 878-226-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2022-10-12 878-226-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2022-10-12 878-226-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2022-10-12 878-226-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2022-08-11 878-248-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J GIBSONIA PA
2022-08-04 878-258-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FREEPORT PA
2022-08-01 878-673-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DERRY PA
2022-06-09 878-837-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BENTLEYVL PA
2022-06-07 878-260-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CURTISVL PA
2021-11-05 878-246-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CLAYSVILLE PA
2021-11-05 878-246-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CLAYSVILLE PA
2021-11-04 878-243-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2021-10-25 878-239-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ZELIENOPLE PA
2021-07-07 878-322-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DONORA PA
2021-07-07 878-884-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GREENSBURG PA
2021-06-18 878-224-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J FORD CITY PA
2019-06-10 878-220-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EXPORT PA
2019-02-21 878-219-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FARMINGTON PA
2019-02-13 878-355-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J UNIONTOWN PA
2018-11-08 878-332-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WEXFORD PA
2018-09-11 878-214-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GREENSBURG PA
2018-07-12 878-212-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2018-05-23 878-439-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER PA
2018-04-26 878-212-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2018-03-26 878-208-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CRIDERSCOR PA
2017-01-31 878-207-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER PA
2016-12-20 878-847-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEWKNSNGTN PA
2016-12-06 878-847-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEWKNSNGTN PA
2016-07-12 878-218-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2015-12-01 878-999-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PTTSBGZON1 PA
2015-08-11 878-295-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GREENSBURG PA
2015-07-09 878-313-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER PA
2014-01-07 878-201-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER PA
2013-09-20 878-302-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEWKNSNGTN PA

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.