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
2015-02-17	443-734-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2015-02-17	443-868-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ESSEX	MD
2015-02-17	443-985-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	RANDALLSTN	MD
2015-02-10	443-734-2XXX	2000–2999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2015-02-10	443-943-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	SPARROWSPT	MD
2015-02-10	443-979-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	COLUMBIA	MD
2015-02-04	443-461-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2015-02-04	443-461-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2015-02-04	443-461-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2015-01-26	443-819-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2015-01-26	443-819-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BEL AIR	MD
2015-01-16	443-776-5XXX	5000–5999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	ELKRIDGE	MD
2015-01-15	443-563-4XXX	4000–4999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2015-01-15	443-563-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2015-01-15	443-563-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2015-01-15	443-563-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2015-01-15	443-917-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	COLUMBIA	MD
2015-01-15	443-917-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	COLUMBIA	MD
2015-01-14	443-342-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SOLOMONS	MD
2015-01-14	443-343-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	MILLERSVL	MD
2015-01-14	443-408-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SPARROWSPT	MD
2015-01-14	443-489-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	CHASE	MD
2015-01-14	443-526-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	HAVREGRACE	MD
2015-01-14	443-648-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ESSEX	MD
2015-01-14	443-818-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ARGRGBSNIS	MD
2015-01-14	443-877-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	NORTH EAST	MD
2015-01-14	443-877-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	NORTH EAST	MD
2015-01-09	443-753-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	WATERLO236	MD
2015-01-08	443-325-4XXX	4000–4999	Assigned	METROPCS, INC.	5562	ELLICOTTCY	MD
2015-01-08	443-599-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2015-01-02	443-707-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2015-01-02	443-707-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2015-01-02	443-707-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2015-01-02	443-713-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2015-01-02	443-713-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2014-12-29	443-784-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ARGRGBSNIS	MD
2014-12-29	443-784-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ARGRGBSNIS	MD
2014-12-29	443-817-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ARGRGBSNIS	MD
2014-12-29	443-817-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ARGRGBSNIS	MD
2014-12-29	443-898-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	PIKESVILLE	MD
2014-12-29	443-941-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ELKTON	MD
2014-12-29	443-961-0XXX	0000–0999	Assigned	INTRADO COMMUNICATIONS, LLC	820C	BALTIMORE	MD
2014-12-29	443-961-9XXX	9000–9999	Assigned	INTRADO COMMUNICATIONS, LLC	820C	BALTIMORE	MD
2014-12-19	443-620-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	WATERLO238	MD
2014-12-15	443-251-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	CATONSVL	MD
2014-12-15	443-251-4XXX	4000–4999	Assigned	ONVOY, LLC - MD	876D	CATONSVL	MD
2014-12-15	443-775-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2014-12-15	443-775-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2014-12-15	443-870-4XXX	4000–4999	Assigned	ONVOY, LLC - MD	876D	PIKESVILLE	MD
2014-12-15	443-870-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	PIKESVILLE	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.