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
2017-07-26	443-601-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	FALLSTON	MD
2017-07-20	443-674-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	NORTH EAST	MD
2017-07-17	443-596-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	ESSEX	MD
2017-07-10	443-731-4XXX	4000–4999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	PT DEPOSIT	MD
2017-07-05	443-281-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	COCKEYSVL	MD
2017-07-05	443-495-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2017-06-22	443-513-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	BERLIN	MD
2017-06-13	443-396-6XXX	6000–6999	Assigned	IP HORIZON LLC	515J	ODENTON	MD
2017-06-13	443-661-2XXX	2000–2999	Assigned	IP HORIZON LLC	515J	WATERLO238	MD
2017-06-09	443-664-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	OCEAN CITY	MD
2017-06-06	443-639-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	HAMPSTEAD	MD
2017-05-22	443-782-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2017-05-18	443-689-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	COCKEYSVL	MD
2017-05-01	443-456-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2017-05-01	443-484-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2017-05-01	443-582-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	CHURCHVL	MD
2017-05-01	443-734-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SEVERN	MD
2017-05-01	443-734-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SEVERN	MD
2017-04-28	443-355-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELLICOTTCY	MD
2017-04-28	443-355-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELLICOTTCY	MD
2017-04-28	443-793-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PARKVILLE	MD
2017-04-28	443-793-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PARKVILLE	MD
2017-04-17	443-329-8XXX	8000–8999	Assigned	TELNYX LLC	073H	WATERLO236	MD
2017-04-14	443-227-0XXX	0000–0999	Assigned	TELNYX LLC	073H	PT DEPOSIT	MD
2017-04-14	443-238-8XXX	8000–8999	Assigned	TELNYX LLC	073H	PARKTON	MD
2017-04-14	443-247-8XXX	8000–8999	Assigned	TELNYX LLC	073H	UNION BDG	MD
2017-04-14	443-339-0XXX	0000–0999	Assigned	TELNYX LLC	073H	SHERWD FOR	MD
2017-04-14	443-347-8XXX	8000–8999	Assigned	TELNYX LLC	073H	CARDIFF	MD
2017-04-14	443-383-8XXX	8000–8999	Assigned	TELNYX LLC	073H	SILVER RUN	MD
2017-04-14	443-396-8XXX	8000–8999	Assigned	TELNYX LLC	073H	ODENTON	MD
2017-04-14	443-441-3XXX	3000–3999	Assigned	TELNYX LLC	073H	GLENWOOD	MD
2017-04-14	443-526-5XXX	5000–5999	Assigned	TELNYX LLC	073H	HAVREGRACE	MD
2017-04-14	443-533-0XXX	0000–0999	Assigned	TELNYX LLC	073H	JARRETTSVL	MD
2017-04-14	443-582-0XXX	0000–0999	Assigned	TELNYX LLC	073H	CHURCHVL	MD
2017-04-14	443-585-6XXX	6000–6999	Assigned	TELNYX LLC	073H	DARLINGTON	MD
2017-04-14	443-609-5XXX	5000–5999	Assigned	TELNYX LLC	073H	SYKESVILLE	MD
2017-04-14	443-639-0XXX	0000–0999	Assigned	TELNYX LLC	073H	HAMPSTEAD	MD
2017-04-14	443-645-9XXX	9000–9999	Assigned	TELNYX LLC	073H	MILLERSVL	MD
2017-04-14	443-646-9XXX	9000–9999	Assigned	TELNYX LLC	073H	NORTHBEACH	MD
2017-04-14	443-647-5XXX	5000–5999	Assigned	TELNYX LLC	073H	NEWWINDSOR	MD
2017-04-14	443-662-6XXX	6000–6999	Assigned	TELNYX LLC	073H	SPARKSGLNC	MD
2017-04-14	443-899-4XXX	4000–4999	Assigned	TELNYX LLC	073H	WATERLO238	MD
2017-04-14	443-947-9XXX	9000–9999	Assigned	TELNYX LLC	073H	PERRYVILLE	MD
2017-04-14	443-967-7XXX	7000–7999	Assigned	TELNYX LLC	073H	NORTH EAST	MD
2017-04-14	443-971-0XXX	0000–0999	Assigned	TELNYX LLC	073H	TANEYTOWN	MD
2017-04-13	443-363-8XXX	8000–8999	Assigned	TELNYX LLC	073H	SEVERN	MD
2017-04-13	443-530-8XXX	8000–8999	Assigned	TELNYX LLC	073H	DUNDALK	MD
2017-04-13	443-576-9XXX	9000–9999	Assigned	TELNYX LLC	073H	RANDALLSTN	MD
2017-04-13	443-601-8XXX	8000–8999	Assigned	TELNYX LLC	073H	FALLSTON	MD
2017-04-13	443-606-8XXX	8000–8999	Assigned	TELNYX LLC	073H	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.