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 667
COMCAST IP PHONE, LLC 52
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
2025-07-02 667-398-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PT DEPOSIT MD
2024-11-22 667-526-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CENTREVL MD
2024-04-03 667-348-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RIDGELY MD
2023-12-01 667-743-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J QUEENSTOWN MD
2023-12-01 667-766-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J STEVENSVL MD
2023-06-29 667-363-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SHERWD FOR MD
2023-03-02 667-661-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SNOW HILL MD
2023-02-17 667-394-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEWWINDSOR MD
2023-01-06 667-340-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHURCHVL MD
2022-12-08 667-853-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J POCOMOKE MD
2022-10-27 667-418-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GREENSBORO MD
2022-06-16 667-302-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CECILTON MD
2022-06-16 667-342-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PRESTON MD
2022-04-13 667-737-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PERRYVILLE MD
2021-09-13 667-577-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ELKTON MD
2021-09-13 667-577-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKTON MD
2021-02-12 667-221-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2021-02-11 667-288-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BERLIN MD
2021-02-11 667-288-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BERLIN MD
2021-02-11 667-663-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2019-10-02 667-270-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2019-03-01 667-653-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRYNPKLNCM MD
2017-11-08 667-204-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2017-09-28 667-314-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WESTMINSTR MD
2017-08-30 667-260-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2017-05-31 667-260-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2016-12-20 667-240-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J COLUMBIA MD
2016-11-18 667-802-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CATONSVL MD
2016-11-08 667-206-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J TOWSON MD
2016-10-20 667-777-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SEVERNA PK MD
2016-09-28 667-215-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ELKTON MD
2016-07-12 667-229-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ABERDEEN MD
2016-05-26 667-367-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WESTMINSTR MD
2016-03-31 667-200-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J COLUMBIA MD
2015-12-14 667-312-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-11-16 667-210-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-07-27 667-930-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-09-17 667-239-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-09-15 667-225-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2014-08-22 667-231-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ABERDEEN MD
2014-08-07 667-206-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TOWSON MD
2014-06-30 667-212-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-06-30 667-212-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-06-30 667-212-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-06-30 667-212-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-05-06 667-309-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-04-02 667-303-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-02-20 667-309-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2014-02-20 667-309-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2013-10-22 667-307-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CROFTON MD

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.