Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
—	330-580	not yet reported which blocks →	OHIO BELL TEL CO	9321	CANTON	OH
—	330-581	0XXX2XXX4XXX6XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	ALLIANCE	OH
—	330-583	1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	GREENE	OH
—	330-584	8XXX9XXX · 2 holders which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	NO BENTON	OH
—	330-585	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	ALLIANCE	OH
—	330-587	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	PAETEC ITEL, LLC	829J	HARTVILLE	OH
—	330-588	6XXX which blocks →	OHIO BELL TEL CO	9321	CANTON	OH
—	330-589	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	NILES	OH
—	330-590	1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	SHARON CTR	OH
—	330-592	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-593	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	KENT	OH
—	330-594	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	MOGADORE	OH
—	330-595	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	UNIONTOWN	OH
—	330-596	0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	OHIO BELL TEL CO	9321	ALLIANCE	OH
—	330-597	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	PAETEC ITEL, LLC	829J	ATWATER	OH
—	330-598	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	MONTROSE	OH
—	330-602	not yet reported which blocks →	FRONTIER NORTH, INC. - OH	0615	NEWPHLDLPH	OH
—	330-603	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-604	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-605	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CANTON	OH
—	330-606	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-607	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-608	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-609	2XXX3XXX4XXX9XXX · 3 holders which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	WARREN	OH
—	330-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	OH
—	330-613	not yet reported which blocks →	SPOK, INC.	6630	YOUNGSTOWN	OH
—	330-615	1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-618	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-620	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	AKRON	OH
—	330-621	0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	WOOSTER	OH
—	330-623	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	YOUNGSTOWN	OH
—	330-624	2XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	FRONTIER NORTH, INC. - OH	0615	BURBANK	OH
—	330-625	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH, INC. - OH	0615	HOMERVILLE	OH
—	330-626	not yet reported which blocks →	OHIO BELL TEL CO	9321	KENT	OH
—	330-627	not yet reported which blocks →	FRONTIER NORTH, INC. - OH	0615	CARROLLTON	OH
—	330-628	not yet reported which blocks →	OHIO BELL TEL CO	9321	MOGADORE	OH
—	330-629	not yet reported which blocks →	OHIO BELL TEL CO	9321	YOUNGSTOWN	OH
—	330-630	not yet reported which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-633	not yet reported which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-634	3XXX4XXX5XXX6XXX7XXX which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-637	not yet reported which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	CORTLAND	OH
—	330-638	not yet reported which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	CORTLAND	OH
—	330-639	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	CANTON	OH
—	330-640	not yet reported which blocks →	SPOK, INC.	6630	YOUNGSTOWN	OH
—	330-641	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	WOOSTER	OH
—	330-643	not yet reported which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-644	not yet reported which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-645	5XXX8XXX · 2 holders which blocks →	OHIO BELL TEL CO	9321	AKRON	OH
—	330-648	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	FRONTIER NORTH, INC. - OH	0615	SPENCER	OH
—	330-649	1XXX2XXX3XXX7XXX · 4 holders which blocks →	OHIO BELL TEL CO	9321	CANTON	OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.