Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
—	631-328	1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	BAY SHORE	NY
—	631-329	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	E HAMPTON	NY
—	631-331	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	PTJEFFERSN	NY
—	631-334	none assigned yet which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	CENTRAISLP	NY
—	631-337	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	SAYVILLE	NY
—	631-340	not yet reported which blocks →	SPOK, INC.	6630	BABYLON	NY
—	631-341	0XXX3XXX4XXX5XXX7XXX · 5 holders which blocks →	VERIZON NEW YORK, INC.	9104	YAPHANK	NY
—	631-342	3XXX5XXX which blocks →	VERIZON NEW YORK, INC.	9104	CENTRAISLP	NY
—	631-344	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	YAPHANK	NY
—	631-345	1XXX4XXX7XXX8XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	YAPHANK	NY
—	631-348	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	CENTRAISLP	NY
—	631-350	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	HUNTINGTON	NY
—	631-351	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-354	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	MATTITUCK	NY
—	631-357	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	VERIZON NEW YORK, INC.	9104	BRENTWOOD	NY
—	631-360	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	SMITHTOWN	NY
—	631-361	0XXX1XXX which blocks →	VERIZON NEW YORK, INC.	9104	SMITHTOWN	NY
—	631-362	not yet reported which blocks →				NY
—	631-363	1XXX4XXX which blocks →	VERIZON NEW YORK, INC.	9104	BAYPORT	NY
—	631-366	7XXX8XXX9XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	SMITHTOWN	NY
—	631-367	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	COLDSPGHBR	NY
—	631-368	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	W COMMACK	NY
—	631-369	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RIVERHEAD	NY
—	631-370	7XXX which blocks →	TC SYSTEMS, INC. - NY	7140	FARMINGDL	NY
—	631-373	not yet reported which blocks →	SPOK, INC.	6630	BRENTWOOD	NY
—	631-376	9XXX which blocks →	VERIZON NEW YORK, INC.	9104	BABYLON	NY
—	631-378	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	SHOREHAM	NY
—	631-380	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	STONYBROOK	NY
—	631-382	0XXX1XXX6XXX8XXX · 4 holders which blocks →	VERIZON NEW YORK, INC.	9104	SMITHTOWN	NY
—	631-385	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-386	1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	FARMINGDL	NY
—	631-387	1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	TC SYSTEMS, INC. - NY	7140	COMMACK	NY
—	631-389	8XXX which blocks →	PAETEC ITEL, LLC	829J	RONKONKOMA	NY
—	631-390	not yet reported which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-391	6XXX which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-393	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-395	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	ATLANTIC	NY
—	631-396	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-398	not yet reported which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	BRENTWOOD	NY
—	631-399	8XXX which blocks →	VERIZON NEW YORK, INC.	9104	ATLANTIC	NY
—	631-400	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC- NY	384C	CTRMORICHS	NY
—	631-404	0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	AT&T - LOCAL	7421	BRENTWOOD	NY
—	631-406	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	RCN TELECOM SERVICES, INC. - NY	7353	SMITHTOWN	NY
—	631-409	8XXX which blocks →	IP HORIZON LLC	515J	NASSAUZN09	NY
—	631-410	2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	COMMACK	NY
—	631-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	NY
—	631-412	2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	LINDENHST	NY
—	631-414	7XXX9XXX · 2 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-415	2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	CENTRAISLP	NY
—	631-419	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	VERIZON NEW YORK, INC.	9104	BAYPORT	NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.