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
2015-09-09	443-819-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2015-09-09	443-819-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2015-09-03	443-238-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	PARKTON	MD
2015-09-02	443-434-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	FEDERALSBG	MD
2015-08-27	443-495-7XXX	7000–7999	Assigned	COMCAST IP PHONE, LLC	318J	PARKVILLE	MD
2015-08-27	443-704-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	ODENTON	MD
2015-08-27	443-766-4XXX	4000–4999	Assigned	METROPCS, INC.	5562	COLUMBIA	MD
2015-08-27	443-766-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	COLUMBIA	MD
2015-08-25	443-239-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	EASTON	MD
2015-08-25	443-450-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	PIKESVILLE	MD
2015-08-20	443-746-4XXX	4000–4999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	EASTON	MD
2015-08-19	443-252-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PERRYVILLE	MD
2015-08-19	443-442-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PARKVILLE	MD
2015-08-18	443-201-9XXX	9000–9999	Assigned	COMCAST IP PHONE, LLC	318J	WESTMINSTR	MD
2015-08-07	443-771-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PRINCEFRCK	MD
2015-08-06	443-588-3XXX	3000–3999	Assigned	PAETEC ITEL, LLC	829J	PARKVILLE	MD
2015-08-05	443-766-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	COLUMBIA	MD
2015-08-05	443-766-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	COLUMBIA	MD
2015-08-03	443-201-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WESTMINSTR	MD
2015-08-03	443-898-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PIKESVILLE	MD
2015-07-31	443-448-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	DENTON	MD
2015-07-31	443-755-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	WATERLO238	MD
2015-07-30	443-526-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	HAVREGRACE	MD
2015-07-20	443-338-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	SPARKSGLNC	MD
2015-07-17	443-646-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	NORTHBEACH	MD
2015-07-16	443-317-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	CHASE	MD
2015-07-16	443-526-7XXX	7000–7999	Assigned	ONVOY, LLC - MD	876D	HAVREGRACE	MD
2015-07-16	443-526-8XXX	8000–8999	Assigned	ONVOY, LLC - MD	876D	HAVREGRACE	MD
2015-07-15	443-495-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	PARKVILLE	MD
2015-07-15	443-730-3XXX	3000–3999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ESSEX	MD
2015-07-15	443-730-4XXX	4000–4999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ESSEX	MD
2015-07-15	443-796-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	PIKESVILLE	MD
2015-07-15	443-819-1XXX	1000–1999	Assigned	ONVOY, LLC - MD	876D	BEL AIR	MD
2015-07-15	443-819-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	BEL AIR	MD
2015-07-14	443-707-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	ABERDEEN	MD
2015-07-14	443-707-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	ABERDEEN	MD
2015-07-14	443-912-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	TOWSON	MD
2015-06-24	443-868-7XXX	7000–7999	Assigned	COMCAST IP PHONE, LLC	318J	ESSEX	MD
2015-06-23	443-331-8XXX	8000–8999	Assigned	BALTIMORE-WASHINGTON TELEPHONE (BWT)	8697	TANEYTOWN	MD
2015-06-09	443-318-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	COCKEYSVL	MD
2015-06-09	443-338-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SPARKSGLNC	MD
2015-06-09	443-342-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SOLOMONS	MD
2015-06-09	443-494-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	MILLERSVL	MD
2015-06-09	443-914-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WORTHINGTN	MD
2015-06-08	443-347-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	CARDIFF	MD
2015-06-08	443-409-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2015-06-08	443-776-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ELKRIDGE	MD
2015-06-08	443-961-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	MD
2015-06-01	443-425-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PARKVILLE	MD
2015-06-01	443-625-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	FORK	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.