Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2009-02-17	443-333-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-17	443-333-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-17	443-422-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2009-02-17	443-949-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-11	443-354-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2009-02-11	443-354-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2009-02-11	443-356-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2009-02-11	443-356-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2009-02-11	443-356-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2009-02-11	443-356-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2009-02-10	443-221-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-10	443-221-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-10	443-221-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-10	443-221-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2009-02-10	443-509-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2009-02-06	443-789-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WESTMINSTR	MD
2009-02-02	443-229-2XXX	2000–2999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	SEVERNA PK	MD
2009-01-30	443-364-6XXX	6000–6999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	ELLICOTTCY	MD
2009-01-30	443-364-7XXX	7000–7999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	ELLICOTTCY	MD
2009-01-14	443-447-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-14	443-447-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2009-01-05	443-329-3XXX	3000–3999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	WATERLO236	MD
2009-01-05	443-365-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SALISBURY	MD
2009-01-05	443-487-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WESTMINSTR	MD
2009-01-05	443-640-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BEL AIR	MD
2009-01-05	443-684-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PRINCEFRCK	MD
2009-01-05	443-949-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ANNAPOLIS	MD
2008-12-26	443-306-2XXX	2000–2999	Assigned	METROPCS, INC.	5562	SEVERNA PK	MD
2008-12-18	443-518-1XXX	1000–1999	Assigned	VERIZON MARYLAND, INC.	9212	COLUMBIA	MD
2008-12-18	443-518-2XXX	2000–2999	Assigned	VERIZON MARYLAND, INC.	9212	COLUMBIA	MD
2008-12-18	443-518-3XXX	3000–3999	Assigned	VERIZON MARYLAND, INC.	9212	COLUMBIA	MD
2008-12-18	443-518-4XXX	4000–4999	Assigned	VERIZON MARYLAND, INC.	9212	COLUMBIA	MD
2008-12-18	443-518-5XXX	5000–5999	Assigned	VERIZON MARYLAND, INC.	9212	COLUMBIA	MD
2008-12-17	443-447-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BALTIMORE	MD
2008-12-17	443-835-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2008-12-09	443-209-7XXX	7000–7999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	HAVREGRACE	MD
2008-12-09	443-225-7XXX	7000–7999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	CAMBRIDGE	MD
2008-12-09	443-267-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	DARLINGTON	MD
2008-12-09	443-282-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	CHESTERTN	MD
2008-12-09	443-686-7XXX	7000–7999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	FALLSTON	MD
2008-12-09	443-706-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	CRISFIELD	MD
2008-12-09	443-987-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BEL AIR	MD
2008-12-09	443-988-4XXX	4000–4999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	CENTREVL	MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.