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 401

ONVOY, LLC - RI 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
2008-03-06	401-390	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	PROVIDENCE	RI
2007-09-13	401-489	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2006-12-19	401-256	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2006-11-13	401-536	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2006-10-17	401-644	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2006-08-22	401-688	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2006-06-20	401-919	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
2006-04-28	401-654	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2006-03-01	401-808	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2006-01-03	401-626	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	PROVIDENCE	RI
2005-05-10	401-441	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2004-12-29	401-216	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7351	WOONSOCKET	RI
2004-03-03	401-343	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	AT&T - LOCAL	7421	HOPEVALLEY	RI
2003-07-22	401-699	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	PROVIDENCE	RI
2002-10-23	401-203	0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	GREENWICH	RI
2002-10-23	401-206	0XXX4XXX5XXX which blocks →	METROPCS, INC.	5562	W WARWICK	RI
2002-10-23	401-207	none assigned yet which blocks →	METROPCS, INC.	5562	NARRAGNSTT	RI
2002-10-23	401-252	0XXX2XXX4XXX5XXX8XXX · 4 holders which blocks →	METROPCS, INC.	5562	WARREN	RI
2002-10-23	401-269	0XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks →	METROPCS, INC.	5562	COVENTRY	RI
2002-10-23	401-297	0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks →	METROPCS, INC.	5562	BRISTOL	RI
2002-10-23	401-300	0XXX3XXX4XXX5XXX · 2 holders which blocks →	METROPCS, INC.	5562	CENTREDALE	RI
2002-10-23	401-309	0XXX4XXX5XXX · 2 holders which blocks →	METROPCS, INC.	5562	WOONSOCKET	RI
2002-08-20	401-230	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PROVIDENCE	RI
2002-08-07	401-263	7XXX8XXX which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
2002-07-30	401-391	0XXX3XXX4XXX5XXX which blocks →	METROPCS, INC.	5562	WARWICK	RI
2002-07-30	401-418	3XXX8XXX9XXX · 2 holders which blocks →	METROPCS, INC.	5562	PORTSMOUTH	RI
2002-07-30	401-617	none assigned yet which blocks →	METROPCS, INC.	5562	PAWTUCKET	RI
2002-07-18	401-266	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PORTSMOUTH	RI
2002-03-12	401-413	none assigned yet which blocks →	METROPCS, INC.	5562	PROVIDENCE	RI
2002-03-07	401-301	not yet reported which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
2002-02-26	401-412	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	PAETEC ITEL, LLC	829J	COVENTRY	RI
2001-11-27	401-360	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	NARRAGNSTT	RI
2001-10-25	401-250	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7351	W WARWICK	RI
2001-10-08	401-304	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	W WARWICK	RI
2001-10-08	401-330	0XXX6XXX7XXX8XXX9XXX which blocks →	PAETEC ITEL, LLC	829J	PROVIDENCE	RI
2001-10-08	401-402	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	GREENWICH	RI
2001-10-08	401-616	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	PAWTUCKET	RI
2001-10-01	401-499	not yet reported which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
2001-07-10	401-610	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - RI	977E	COVENTRY	RI
2001-06-18	401-733	1XXX2XXX3XXX5XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7351	WOONSOCKET	RI
2001-06-14	401-369	7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2001-06-11	401-665	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WOONSOCKET	RI
2001-06-04	401-772	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WOONSOCKET	RI
2001-05-29	401-363	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - RI	003F	NARRAGNSTT	RI
2001-04-19	401-285	1XXX5XXX6XXX7XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	PASCOAG	RI
2001-04-19	401-859	0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	BLOCK IS	RI
2001-04-17	401-225	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2001-04-17	401-965	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2001-04-11	401-623	4XXX5XXX8XXX · 2 holders which blocks →	METROPCS, INC.	5562	COVENTRY	RI
2001-04-11	401-692	2XXX3XXX4XXX5XXX8XXX which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	CUMBLND HL	RI

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.