Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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

Rogers Communications Canada Inc. (Wireless) 46

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 28

NEW CINGULAR WIRELESS PCS, LLC - IL 23

ONVOY, LLC - CA 19

New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025

Quick find in this area code:

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
—	513-296	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	REILY	OH
—	513-297	8XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	CINCINNATI	OH
—	513-298	0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	BETHANY	OH
—	513-299	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	SEVEN MILE	OH
—	513-300	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-303	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-304	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CINCINNATI	OH
—	513-305	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CINCINNATI	OH
—	513-307	not yet reported which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
—	513-308	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	CINCINNATI	OH
—	513-309	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-310	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	OH
—	513-312	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-313	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-314	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-315	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-316	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-317	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-319	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CINCINNATI	OH
—	513-320	7XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	MIDDLETOWN	OH
—	513-321	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-323	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	SHANDON	OH
—	513-324	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-325	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-326	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-327	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	WILLIAMSBG	OH
—	513-328	not yet reported which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
—	513-330	5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	HAMILTON	OH
—	513-332	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	PAETEC ITEL, LLC	829J	CINCINNATI	OH
—	513-333	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-335	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
—	513-336	not yet reported which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	MASON	OH
—	513-337	0XXX5XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	CINCINNATI	OH
—	513-338	3XXX4XXX6XXX7XXX9XXX · 2 holders which blocks →	LEVEL 3 TELECOM OF OHIO, LLC - OH	7460	CINCINNATI	OH
—	513-339	not yet reported which blocks →	BRIGHTSPEED OF NORTHWEST OHIO, INC.	0661	MASON	OH
—	513-340	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	LTL MIAMI	OH
—	513-342	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	BETHANY	OH
—	513-343	not yet reported which blocks →	SPOK, INC.	6630	CINCINNATI	OH
—	513-345	0XXX which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-346	0XXX8XXX9XXX which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-347	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-348	1XXX2XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
—	513-349	0XXX2XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
—	513-350	not yet reported which blocks →	SPOK, INC.	6630	CINCINNATI	OH
—	513-351	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-352	not yet reported which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-353	6XXX7XXX8XXX · 2 holders which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
—	513-354	0XXX9XXX · 2 holders which blocks →	LEVEL 3 TELECOM OF OHIO, LLC - OH	7460	CINCINNATI	OH
—	513-355	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	MIDDLETOWN	OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.