Recent thousands-block assignments

17 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, last 30 days — NPA 443

ONVOY, LLC - MD 8

NEW CINGULAR WIRELESS PCS, LLC - DC 4

VERSATEL LLC 1

OPENTACT INC. 1

LEVEL 3 COMMUNICATIONS, 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
2003-01-27	443-219-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	PARKVILLE	MD
2003-01-27	443-231-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	ESSEX	MD
2003-01-27	443-341-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	CATONSVL	MD
2003-01-27	443-503-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	DUNDALK	MD
2003-01-27	443-577-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	GLENBURNIE	MD
2003-01-27	443-637-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	ARGRGBSNIS	MD
2003-01-21	443-733-0XXX	0000–0999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WATERLO238	MD
2003-01-09	443-778-2XXX	2000–2999	Assigned	VERIZON MARYLAND, INC.	9212	WATERLO236	MD
2003-01-09	443-778-9XXX	9000–9999	Assigned	VERIZON MARYLAND, INC.	9212	WATERLO236	MD
2002-12-26	443-616-4XXX	4000–4999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-616-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-616-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-616-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-616-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-616-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2002-12-26	443-760-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-760-1XXX	1000–1999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-760-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-760-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-760-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-760-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2002-12-26	443-968-1XXX	1000–1999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	PRINCEFRCK	MD
2002-12-26	443-968-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	PRINCEFRCK	MD
2002-12-11	443-417-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	FALLSTON	MD
2002-12-11	443-975-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PRINCEFRCK	MD
2002-11-21	443-298-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	EASTON	MD
2002-11-07	443-332-4XXX	4000–4999	Assigned	PAETEC ITEL, LLC	829J	CROFTON	MD
2002-11-04	443-487-8XXX	8000–8999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WESTMINSTR	MD
2002-11-04	443-914-0XXX	0000–0999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WORTHINGTN	MD
2002-10-31	443-833-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	ARBUTUS	MD
2002-10-29	443-487-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	WESTMINSTR	MD
2002-10-29	443-625-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	FORK	MD
2002-10-28	443-402-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	EDGEWOOD	MD
2002-07-15	443-856-1XXX	1000–1999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	OCEAN CITY	MD
2002-07-15	443-912-1XXX	1000–1999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	TOWSON	MD
2002-05-31	443-406-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	ELKTON	MD
2002-05-30	443-778-1XXX	1000–1999	Assigned	VERIZON MARYLAND, INC.	9212	WATERLO236	MD
2002-05-03	443-400-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	BRYNPKLNCM	MD
2002-04-30	443-327-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	ABERDEEN	MD
2002-04-08	443-883-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	GLENBURNIE	MD
2002-03-28	443-679-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	SEVERN	MD
2002-03-25	443-261-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	SEVERNA PK	MD
2002-02-12	443-502-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	HAVREGRACE	MD
2001-12-28	443-297-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	ARBUTUS	MD
2001-12-19	443-883-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	GLENBURNIE	MD
2001-11-07	443-445-9XXX	9000–9999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	ELKRIDGE	MD
2001-11-07	443-489-0XXX	0000–0999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CHASE	MD
2001-11-07	443-973-9XXX	9000–9999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	ELLICOTTCY	MD
2001-10-24	443-709-0XXX	0000–0999	Assigned	PAETEC ITEL, LLC	829J	ARBUTUS	MD
2001-10-24	443-709-2XXX	2000–2999	Assigned	PAETEC ITEL, LLC	829J	ARBUTUS	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.