Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 443

PAETEC ITEL, LLC 153

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 NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2011-11-21	443-972	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	CAMBRIDGE	MD
2011-01-06	443-888	0–9 XXXall 10 · 6 holders which blocks →	PAETEC ITEL, LLC	829J	PRINCEANNE	MD
2010-05-05	443-887	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	CATONSVL	MD
2010-03-16	443-464	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	CHURCHVL	MD
2008-04-29	443-470	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	TOWSON	MD
2008-03-05	443-718	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	COLUMBIA	MD
2007-03-28	443-449	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2006-02-07	443-922	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	EDGEWOOD	MD
2005-09-07	443-452	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-07-06	443-954	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2005-05-20	443-855	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	ABERDEEN	MD
2005-05-18	443-766	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	COLUMBIA	MD
2001-09-24	443-837	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	ANNAPOLIS	MD
2001-08-21	443-830	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	CATONSVL	MD
2001-08-21	443-901	3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	TOWSON	MD
2001-08-21	443-940	3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PIKESVILLE	MD
2001-07-23	443-772	5XXX6XXX which blocks →	PAETEC ITEL, LLC	829J	ESSEX	MD
2001-07-23	443-780	4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	WOODLAWN	MD
2001-06-20	443-649	4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	SPARROWSPT	MD
2001-05-18	443-640	4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	BEL AIR	MD
2001-05-11	443-748	1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	MILLERSVL	MD
2001-05-11	443-751	2XXX which blocks →	PAETEC ITEL, LLC	829J	WOODLAWN	MD
2001-05-11	443-757	2XXX4XXX6XXX7XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	ELKRIDGE	MD
2001-05-11	443-767	1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	WORTHINGTN	MD
2001-05-11	443-828	2XXX7XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	ELLICOTTCY	MD
2001-05-11	443-923	not yet reported which blocks →	PAETEC ITEL, LLC	829J	BALTIMORE	MD
2001-05-11	443-969	1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	ESSEX	MD
2001-05-11	443-989	4XXX6XXX7XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	GLENBURNIE	MD
2001-05-10	443-229	1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	SEVERNA PK	MD
2001-05-10	443-242	1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SPARROWSPT	MD
2001-05-10	443-265	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	FORK	MD
2001-05-10	443-322	3XXX4XXX6XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	TOWSON	MD
2001-05-10	443-544	4XXX5XXX7XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PIKESVILLE	MD
2001-05-10	443-565	2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	RANDALLSTN	MD
2001-05-10	443-575	1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	ARBUTUS	MD
2001-05-10	443-626	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	CHASE	MD
2001-05-10	443-656	1XXX2XXX5XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	COLUMBIA	MD
2001-05-10	443-662	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	SPARKSGLNC	MD
2001-05-10	443-670	2XXX4XXX6XXX7XXX which blocks →	PAETEC ITEL, LLC	829J	CATONSVL	MD
2001-05-10	443-673	1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	BRYNPKLNCM	MD
2001-05-10	443-688	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	SEVERN	MD
2001-05-10	443-689	1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	COCKEYSVL	MD
2001-05-10	443-696	1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	DUNDALK	MD
2001-05-10	443-702	1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	ARGRGBSNIS	MD
2001-05-10	443-704	2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	ODENTON	MD
2001-05-09	443-332	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	CROFTON	MD
2001-05-09	443-442	3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	PARKVILLE	MD
2001-03-19	443-372	4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	EDGEWOOD	MD
—	443-209	5XXX6XXX7XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	HAVREGRACE	MD
—	443-212	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SPARKSGLNC	MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.