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
—	508-363	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WORCESTER	MA
—	508-364	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BARNSTABLE	MA
—	508-365	0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WORCESTER	MA
—	508-366	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WESTBORO	MA
—	508-367	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BARNSTABLE	MA
—	508-368	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WORCESTER	MA
—	508-369	8XXX which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MANSFIELD	MA
—	508-370	2XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-371	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	FRAMINGHAM	MA
—	508-373	2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	WORCESTER	MA
—	508-374	2XXX3XXX4XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NANTUCKET	MA
—	508-375	1XXX3XXX5XXX7XXX8XXX · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	BARNSTABLE	MA
—	508-376	0XXX3XXX7XXX · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	MILLIS	MA
—	508-377	1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	MILFORD	MA
—	508-378	none assigned yet which blocks →	VERIZON NEW ENGLAND INC.	9102	EBRIDGEWTR	MA
—	508-379	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	NO SWANSEA	MA
—	508-380	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	FRAMINGHAM	MA
—	508-381	2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MILFORD	MA
—	508-382	2XXX4XXX6XXX · 3 holders which blocks →	TC SYSTEMS, INC.	7135	MARLBORO	MA
—	508-383	3XXX4XXX5XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-384	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WRENTHAM	MA
—	508-385	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	DENNIS	MA
—	508-386	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	TAUNTON	MA
—	508-387	9XXX which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-388	1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MA	892D	FALMOUTH	MA
—	508-389	3XXX4XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	WESTBORO	MA
—	508-390	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-391	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-392	0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	RCN TELECOM SERVICES, INC. - MA	7619	CATAUMET	MA
—	508-393	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	NORTHBORO	MA
—	508-394	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	DENNIS	MA
—	508-395	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FRAMINGHAM	MA
—	508-396	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-397	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NATICK	MA
—	508-398	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	DENNIS	MA
—	508-399	0XXX1XXX3XXX4XXX9XXX · 5 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	SOUTHGATE	MA
—	508-400	none assigned yet which blocks →	METROPCS, INC.	5562	HOPKINTON	MA
—	508-402	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	FALL RIVER	MA
—	508-403	0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	CATAUMET	MA
—	508-404	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC.	7135	WALPOLE	MA
—	508-405	5XXX6XXX7XXX9XXX · 2 holders which blocks →	RCN TELECOM SERVICES, INC. - MA	7619	FRAMINGHAM	MA
—	508-406	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	MANSFIELD	MA
—	508-407	5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	AUBURN	MA
—	508-408	3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BROCKTON	MA
—	508-409	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ATTLEBORO	MA
—	508-410	not yet reported which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	WORCESTER	MA
—	508-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	508-412	not yet reported which blocks →	NORFOLK COUNTY INTERNET, INC.	6083	WESTBORO	MA
—	508-414	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WORCESTER	MA
—	508-416	0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC.	7135	FRAMINGHAM	MA

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.