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
2005-08-15	443-573-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-08-11	443-481-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ANNAPOLIS	MD
2005-08-02	443-370-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ANNAPOLIS	MD
2005-08-02	443-617-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	FALLSTON	MD
2005-08-02	443-624-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PRINCEFRCK	MD
2005-08-02	443-632-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	TOWSON	MD
2005-08-02	443-693-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PERRYVILLE	MD
2005-08-02	443-867-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GLENBURNIE	MD
2005-07-29	443-878-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	COLUMBIA	MD
2005-07-19	443-296-8XXX	8000–8999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WATERLO238	MD
2005-07-19	443-296-9XXX	9000–9999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WATERLO238	MD
2005-07-19	443-430-2XXX	2000–2999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLUMBIA	MD
2005-07-19	443-430-6XXX	6000–6999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLUMBIA	MD
2005-07-19	443-740-9XXX	9000–9999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BALTIMORE	MD
2005-07-19	443-797-6XXX	6000–6999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	TOWSON	MD
2005-07-19	443-798-6XXX	6000–6999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	TOWSON	MD
2005-07-19	443-874-1XXX	1000–1999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BALTIMORE	MD
2005-07-19	443-957-9XXX	9000–9999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BALTIMORE	MD
2005-07-18	443-278-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-18	443-459-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	ELKRIDGE	MD
2005-07-18	443-600-3XXX	3000–3999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ESSEX	MD
2005-07-18	443-763-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	GLENBURNIE	MD
2005-07-18	443-763-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	GLENBURNIE	MD
2005-07-15	443-220-2XXX	2000–2999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2005-07-15	443-220-3XXX	3000–3999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2005-07-15	443-703-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2005-07-15	443-703-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2005-07-15	443-703-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2005-07-13	443-327-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	ABERDEEN	MD
2005-07-12	443-444-0XXX	0000–0999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-1XXX	1000–1999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-2XXX	2000–2999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-3XXX	3000–3999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-4XXX	4000–4999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-5XXX	5000–5999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-6XXX	6000–6999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-7XXX	7000–7999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-8XXX	8000–8999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-444-9XXX	9000–9999	Assigned	VERIZON MARYLAND, INC.	9212	BALTIMORE	MD
2005-07-12	443-954-0XXX	0000–0999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-2XXX	2000–2999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-3XXX	3000–3999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-4XXX	4000–4999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-6XXX	6000–6999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-7XXX	7000–7999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-12	443-954-9XXX	9000–9999	Assigned	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-11	443-205-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	CAMBRIDGE	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.