Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
—	860-332	not yet reported which blocks →	SPOK, INC.	6630	HARTFORD	CT
—	860-333	0–9 XXXall 10 · 6 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NEW LONDON	CT
—	860-334	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	NORWICH	CT
—	860-335	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	HARTFORD	CT
—	860-336	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CT	7143	WILLIMNTIC	CT
—	860-337	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLUMBIA	CT
—	860-338	2XXX5XXX6XXX7XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	GLASTONBY	CT
—	860-339	0–9 XXXall 10 · 9 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	OLD SAYBRK	CT
—	860-340	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	HARTFORD	CT
—	860-341	0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	STORRS	CT
—	860-342	8XXX which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-343	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-344	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-345	1XXX5XXX6XXX which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	HADDAM	CT
—	860-346	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-347	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-348	3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NEWBRITAIN	CT
—	860-349	4XXX which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-350	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NEWMILFORD	CT
—	860-351	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PLAINVILLE	CT
—	860-352	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CANTON	CT
—	860-354	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NEWMILFORD	CT
—	860-355	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NEWMILFORD	CT
—	860-356	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NEWBRITAIN	CT
—	860-357	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NEWBRITAIN	CT
—	860-358	0XXX9XXX · 2 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	MIDDLETOWN	CT
—	860-359	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLUMBIA	CT
—	860-360	not yet reported which blocks →	SPOK, INC.	6630	HARTFORD	CT
—	860-361	0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks →	CABLEVISION LIGHTPATH, INC. - CT	4950	LITCHFIELD	CT
—	860-362	0–9 XXXall 10 · 6 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	CANAAN	CT
—	860-363	not yet reported which blocks →	SPOK, INC.	6630	HARTFORD	CT
—	860-364	3XXX6XXX8XXX · 2 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	SHARON	CT
—	860-365	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	E HAMPTON	CT
—	860-366	not yet reported which blocks →	SPOK, INC.	6630	HARTFORD	CT
—	860-367	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	NORWICH	CT
—	860-368	0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	GLASTONBY	CT
—	860-369	not yet reported which blocks →	SPOK, INC.	6630	HARTFORD	CT
—	860-370	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	WINDSORLKS	CT
—	860-371	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	HARTFORD	CT
—	860-372	0–9 XXXall 10 · 4 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	HARTFORD	CT
—	860-373	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	NORWICH	CT
—	860-374	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DEEP RIVER	CT
—	860-375	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	ROCKVILLE	CT
—	860-376	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	JEWETTCITY	CT
—	860-377	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	WILLIMNTIC	CT
—	860-378	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	SOUTHINGTN	CT
—	860-379	not yet reported which blocks →	SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT	9147	WINSTED	CT
—	860-380	0XXX6XXX7XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CT	7143	HARTFORD	CT
—	860-381	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CT	7143	LEDYARD	CT
—	860-382	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PUTNAM	CT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.