Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 603

CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 247

BELL ATLANTIC MOBILE, INC 74

PAETEC ITEL, LLC 58

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 44

COMCAST IP PHONE, LLC 40

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
2006-09-20	603-905	0XXX9XXX · 2 holders which blocks →	OTEL TELEKOM, INC. - NH	9827	BARRINGTON	NH
2006-03-22	603-970	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	DOVER	NH
2005-08-22	603-904	0XXX3XXX4XXX · 3 holders which blocks →	OTEL TELEKOM, INC. - NH	9827	WALPOLE	NH
2005-02-18	603-708	0XXX1XXX3XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	CANTERBURY	NH
2004-12-14	603-831	0–9 XXXall 10 · 3 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	GREENFIELD	NH
2004-10-05	603-833	0–9 XXXall 10 · 2 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	ROCHESTER	NH
2004-08-18	603-703	0–9 XXXall 10 · 2 holders which blocks →	OTEL TELEKOM, INC. - NH	9827	MANCHESTER	NH
2004-08-17	603-709	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NH	4017	PLAINFIELD	NH
2004-07-28	603-707	0–9 XXXall 10 · 5 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	MEREDITH	NH
2003-06-26	603-593	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	JAFFREY	NH
2003-06-20	603-748	6XXX7XXX8XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	WARNER	NH
2003-06-09	603-300	0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	CHESTER	NH
2003-05-14	603-203	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MANCHESTER	NH
2002-12-06	603-854	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MANCHESTER	NH
2002-10-09	603-505	0–9 XXXall 10 · 3 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	DERRY	NH
2002-09-12	603-686	0–9 XXXall 10 · 3 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	EXETER	NH
2002-08-09	603-995	0XXX4XXX5XXX · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	HENNIKER	NH
2002-08-09	603-996	3XXX9XXX · 2 holders which blocks →	METROPCS, INC.	5562	PLYMOUTH	NH
2002-08-09	603-997	0XXX7XXX which blocks →	METROPCS, INC.	5562	HAMPTON	NH
2002-08-06	603-568	0–9 XXXwhole prefix which blocks →	BELL ATLANTIC MOBILE, INC	6386	CONCORD	NH
2002-07-08	603-702	4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	KINGSTON	NH
2002-07-08	603-721	0XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks →	METROPCS, INC.	5562	MILFORD	NH
2002-07-08	603-818	0XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	DERRY	NH
2002-07-08	603-998	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	METROPCS, INC.	5562	LACONIA	NH
2002-05-20	603-760	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - NH	8299	SEABROOK	NH
2002-05-20	603-790	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	W LEBANON	NH
2002-05-20	603-793	0XXX4XXX5XXX7XXX8XXX · 2 holders which blocks →	METROPCS, INC.	5562	EXETER	NH
2002-05-20	603-836	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MANCHESTER	NH
2002-05-20	603-969	none assigned yet which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PORTSMOUTH	NH
2002-05-20	603-973	0XXX5XXX7XXX which blocks →	METROPCS, INC.	5562	ROCHESTER	NH
2002-04-19	603-918	1XXX2XXX3XXX4XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	HAMPTON	NH
2002-04-19	603-986	0XXX1XXX2XXX3XXX4XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	NO CONWAY	NH
2002-02-22	603-530	1XXX4XXX5XXX8XXX · 3 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	BRISTOL	NH
2002-02-22	603-631	4XXX5XXX6XXX7XXX which blocks →	UNITED STATES CELLULAR - NH	6290	LANCASTER	NH
2002-02-22	603-660	3XXX4XXX5XXX7XXX · 2 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	GOFFSTOWN	NH
2002-02-22	603-915	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	GORHAM	NH
2002-02-22	603-966	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	NASHUA	NH
2002-02-22	603-991	1XXX6XXX7XXX8XXX9XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	LITTLETON	NH
2002-01-22	603-608	1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks →	METROPCS, INC.	5562	NORTHWOOD	NH
2002-01-22	603-630	4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	LACONIA	NH
2002-01-22	603-828	0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	PORTSMOUTH	NH
2002-01-22	603-957	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PORTSMOUTH	NH
2001-12-19	603-817	2XXX3XXX4XXX5XXX which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	DOVER	NH
2001-12-19	603-944	2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	SO HAMPTON	NH
2001-11-19	603-714	1XXX2XXX3XXX6XXX7XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	BEDFORD	NH
2001-10-17	603-370	2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	CANDIA	NH
2001-10-17	603-401	2XXX3XXX5XXX6XXX which blocks →	BELL ATLANTIC MOBILE, INC	6386	SALEM	NH
2001-10-17	603-988	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PORTSMOUTH	NH
2001-09-24	603-509	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	ROCHESTER	NH
2001-09-19	603-302	not yet reported which blocks →	CONSOLIDATED COMM OF NO. NEW ENGLAND-NH	5113	MANCHESTER	NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.