Recent prefix assignments

1 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, last 30 days — NPA 508

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 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 NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2026-09-04	508-724	0XXX1XXX2XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NEWBEDFORD	MA
2026-08-20	508-600	0XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HYANNIS	MA
2025-11-26	508-781	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NEWBEDFORD	MA
2025-04-14	508-774	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	FALL RIVER	MA
2025-04-01	508-260	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	BARNSTABLE	MA
2025-03-04	508-508	0–9 XXXwhole prefix which blocks →	MASS MOBILE LLC	125L	WORCESTER	MA
2023-08-02	508-225	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HYANNIS	MA
2023-05-26	508-978	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	TAUNTON	MA
2022-05-10	508-204	0–9 XXXall 10 · 5 holders which blocks →	COMMIO, LLC	939H	NEWBEDFORD	MA
2021-11-09	508-290	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	NORTHBORO	MA
2018-08-14	508-239	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FRAMINGHAM	MA
2018-03-05	508-504	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	WEBSTER	MA
2018-02-15	508-206	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NATICK	MA
2010-05-14	508-973	0–9 XXXwhole prefix which blocks →	VERIZON NEW ENGLAND INC.	9102	FALL RIVER	MA
2008-07-23	508-840	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	ATTLEBORO	MA
2008-07-23	508-933	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	ROCHESTER	MA
2006-10-23	508-465	0–9 XXXall 10 · 7 holders which blocks →	COMCAST IP PHONE, LLC	318J	CARVER	MA
2006-07-21	508-681	0–9 XXXall 10 · 6 holders which blocks →	FREEDOM RING COMMUNICATIONS, LLC	8468	OSTERVILLE	MA
2006-06-20	508-649	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BROCKTON	MA
2005-03-25	508-322	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WAREHAM	MA
2004-08-16	508-812	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	NO SWANSEA	MA
2004-08-16	508-859	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	LEICESTER	MA
2004-05-28	508-779	0–9 XXXall 10 · 8 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	UXBRIDGE	MA
2004-05-04	508-731	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	OXFORD	MA
2003-11-12	508-499	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	OXFORD	MA
2003-09-29	508-575	not yet reported which blocks →	NEP, LLC	174A	TAUNTON	MA
2003-06-19	508-506	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	OXFORD	MA
2003-02-05	508-502	0–9 XXXall 10 · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	WORCESTER	MA
2002-07-18	508-617	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FALL RIVER	MA
2002-07-08	508-308	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FRAMINGHAM	MA
2002-07-08	508-446	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FRANKLIN	MA
2002-07-03	508-415	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FALL RIVER	MA
2002-07-03	508-659	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	BRIDGEWTR	MA
2002-06-27	508-603	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	UPTON	MA
2002-06-04	508-401	0–9 XXXall 10 · 8 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WAYLAND	MA
2002-06-04	508-637	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NOBROOKFLD	MA
2002-05-23	508-413	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	PROVINCETN	MA
2002-03-12	508-551	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WORCESTER	MA
2002-02-27	508-340	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WORCESTER	MA
2001-10-11	508-207	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NEWBEDFORD	MA
2001-10-11	508-250	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	FRAMINGHAM	MA
2001-06-14	508-507	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	FRANKLIN	MA
2001-04-11	508-203	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	FOXBORO	MA
2001-04-11	508-570	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	FRANKLIN	MA
2001-03-06	508-263	0XXX9XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	MARLBORO	MA
2001-03-06	508-372	0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	WHITINSVL	MA
2001-02-21	508-736	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WORCESTER	MA
2001-02-21	508-918	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC.	7135	FRANKLIN	MA
2001-02-16	508-656	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	FRAMINGHAM	MA
2001-02-16	508-683	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	MARLBORO	MA

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.