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
—	401-558	5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	GREENWICH	RI
—	401-559	none assigned yet which blocks →	METROPCS, INC.	5562	PROVIDENCE	RI
—	401-560	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	COMCAST IP PHONE, LLC	318J	JAMESTOWN	RI
—	401-561	not yet reported which blocks →	ONVOY, LLC - RI	977E	WARREN	RI
—	401-562	7XXX which blocks →	PAETEC ITEL, LLC	829J	WARWICK	RI
—	401-563	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-564	not yet reported which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	CUMBLND HL	RI
—	401-566	0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	JAMESTOWN	RI
—	401-567	1XXX2XXX3XXX6XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	PASCOAG	RI
—	401-568	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	PASCOAG	RI
—	401-569	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
—	401-572	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
—	401-573	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
—	401-574	1XXX2XXX4XXX6XXX · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-575	0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-578	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
—	401-579	1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks →	METROPCS, INC.	5562	WOONSOCKET	RI
—	401-580	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
—	401-581	6XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	WOONSOCKET	RI
—	401-582	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	WOONSOCKET	RI
—	401-583	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	NO KINGSTN	RI
—	401-584	1XXX7XXX8XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	WESTERLY	RI
—	401-586	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	W WARWICK	RI
—	401-588	0XXX9XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-589	0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	W WARWICK	RI
—	401-592	1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	LTLCOMPTON	RI
—	401-593	not yet reported which blocks →	ONVOY, LLC - RI	977E	WARWICK	RI
—	401-594	1XXX5XXX6XXX7XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	NARRAGNSTT	RI
—	401-595	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
—	401-596	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WESTERLY	RI
—	401-597	2XXX5XXX6XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	WOONSOCKET	RI
—	401-598	6XXX7XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-599	0XXX1XXX3XXX5XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	TIVERTON	RI
—	401-604	8XXX which blocks →	PAETEC ITEL, LLC	829J	WESTERLY	RI
—	401-608	0XXX4XXX7XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	NEWPORT	RI
—	401-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	RI
—	401-615	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	W WARWICK	RI
—	401-619	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	COMCAST IP PHONE, LLC	318J	NEWPORT	RI
—	401-620	0XXX2XXX3XXX which blocks →	ONVOY, LLC - RI	977E	WESTERLY	RI
—	401-621	6XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	PROVIDENCE	RI
—	401-622	0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - RI	4016	WESTERLY	RI
—	401-624	none assigned yet which blocks →	VERIZON NEW ENGLAND INC.	9102	TIVERTON	RI
—	401-625	2XXX3XXX6XXX8XXX9XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	TIVERTON	RI
—	401-628	4XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	WARREN	RI
—	401-632	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	PROVIDENCE	RI
—	401-633	2XXX4XXX5XXX which blocks →	PAETEC ITEL, LLC	829J	PROVIDENCE	RI
—	401-635	3XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	LTLCOMPTON	RI
—	401-636	3XXX4XXX5XXX6XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WOONSOCKET	RI
—	401-637	0XXX1XXX4XXX7XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	WESTERLY	RI
—	401-638	not yet reported which blocks →	ONVOY, LLC - RI	977E	BRISTOL	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.