Recent thousands-block assignments

1 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, last 30 days — NPA 301

ONVOY, LLC - MD 1

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
2003-05-08	301-833-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNG236Z14	MD
2003-05-08	301-833-9XXX	9000–9999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNG236Z14	MD
2003-05-07	301-337-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	GAITHERSBG	MD
2003-04-02	301-407-4XXX	4000–4999	Assigned	VERIZON MARYLAND, INC.	9212	GAITHERSBG	MD
2003-03-12	301-531-9XXX	9000–9999	Assigned	PAETEC ITEL, LLC	829J	WSHNGTNZN4	MD
2003-03-12	301-886-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	WSNG236Z13	MD
2003-02-28	301-358-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	WSNG236Z15	MD
2003-02-28	301-476-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	ASHTON236	MD
2003-02-28	301-579-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BRANDYWINE	MD
2003-02-28	301-685-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	DAMASCS236	MD
2003-02-14	301-232-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	ASHTON236	MD
2003-02-10	301-876-0XXX	0000–0999	Assigned	USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD	4720	CUMBERLAND	MD
2003-02-10	301-876-1XXX	1000–1999	Assigned	USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD	4720	CUMBERLAND	MD
2003-02-10	301-876-2XXX	2000–2999	Assigned	USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD	4720	CUMBERLAND	MD
2003-02-10	301-876-3XXX	3000–3999	Assigned	USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD	4720	CUMBERLAND	MD
2003-02-06	301-242-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	BRANDYWINE	MD
2002-11-22	301-418-9XXX	9000–9999	Assigned	VERIZON MARYLAND, INC.	9212	FREDERICK	MD
2002-11-06	301-265-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSHNGTNZN6	MD
2002-08-30	301-789-0XXX	0000–0999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	WSHNGTNZN4	MD
2002-07-18	301-857-0XXX	0000–0999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	CLEAR SPG	MD
2002-05-23	301-850-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	WSNG236Z14	MD
2002-05-17	301-876-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	CUMBERLAND	MD
2002-01-17	301-859-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	OAKLAND	MD
2001-11-21	301-238-0XXX	0000–0999	Assigned	VERIZON MARYLAND, INC.	9212	WSNGTNZN16	MD
2001-10-03	301-829-7XXX	7000–7999	Assigned	VERIZON MARYLAND, INC.	9212	MOUNT AIRY	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.