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 717

CTSI, INC. - PA 43

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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2016-08-02	717-663-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2016-08-02	717-663-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2015-01-13	717-591-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	MECHANCSBG	PA
2012-10-03	717-947-1XXX	1000–1999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2012-10-03	717-947-2XXX	2000–2999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2009-09-22	717-461-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	HARISBGZN1	PA
2009-01-28	717-814-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2008-11-17	717-814-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2007-10-01	717-614-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	HARISBGZN1	PA
2006-10-04	717-229-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	JEFFERSON	PA
2006-10-04	717-308-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	DOVER	PA
2006-10-04	717-378-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	RED LION	PA
2006-10-04	717-382-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	FAWN GROVE	PA
2006-10-04	717-429-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	DELTA	PA
2006-10-04	717-739-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	SPRING GRV	PA
2006-10-04	717-746-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	STEWARTSTN	PA
2006-10-04	717-759-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	GLEN ROCK	PA
2006-10-04	717-896-5XXX	5000–5999	Assigned	CTSI, INC. - PA	7513	HALIFAX	PA
2006-10-03	717-933-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	FRYSTOWN	PA
2006-09-19	717-820-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	JONESTOWN	PA
2006-09-08	717-537-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	LANDISVL	PA
2006-09-08	717-628-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	MYERSTOWN	PA
2006-09-08	717-876-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	MILLERSVL	PA
2006-09-08	717-949-1XXX	1000–1999	Assigned	CTSI, INC. - PA	7513	SCHAEFESTN	PA
2006-09-08	717-967-7XXX	7000–7999	Assigned	CTSI, INC. - PA	7513	MT GRETNA	PA
2006-08-17	717-268-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	MANCHESTER	PA
2006-08-17	717-469-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	SHELLSVL	PA
2006-06-07	717-434-1XXX	1000–1999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2005-12-29	717-412-6XXX	6000–6999	Assigned	CTSI, INC. - PA	7513	HARISBGZN1	PA
2005-07-07	717-801-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2005-07-07	717-801-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2005-06-30	717-583-5XXX	5000–5999	Assigned	CTSI, INC. - PA	7513	HUMMELSTN	PA
2005-06-14	717-833-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	PALMYRA	PA
2005-06-14	717-868-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	ANNVILLE	PA
2004-11-24	717-718-7XXX	7000–7999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2004-07-22	717-478-2XXX	2000–2999	Assigned	CTSI, INC. - PA	7513	WRIGHTSVL	PA
2004-05-17	717-718-8XXX	8000–8999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2004-03-01	717-455-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	STRASBURG	PA
2003-05-05	717-600-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	YORK	PA
2002-05-17	717-358-9XXX	9000–9999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2002-05-17	717-381-2XXX	2000–2999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2002-05-17	717-381-3XXX	3000–3999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA
2002-05-17	717-381-4XXX	4000–4999	Assigned	CTSI, INC. - PA	7513	LANCASTER	PA

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.