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
—	631-584	1XXX which blocks →	VERIZON NEW YORK, INC.	9104	ST JAMES	NY
—	631-585	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-586	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	DEER PARK	NY
—	631-587	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	BABYLON	NY
—	631-588	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-589	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	SAYVILLE	NY
—	631-590	0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	RONKONKOMA	NY
—	631-591	0XXX1XXX2XXX3XXX6XXX · 2 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	RIVERHEAD	NY
—	631-592	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	LINDENHST	NY
—	631-593	0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	GREENPORT	NY
—	631-595	0XXX3XXX4XXX5XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	DEER PARK	NY
—	631-597	0XXX1XXX2XXX3XXX5XXX8XXX · 4 holders which blocks →	VERIZON NEW YORK, INC.	9104	E FIRE IS	NY
—	631-598	5XXX9XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	AMITYVILLE	NY
—	631-599	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	RIVERHEAD	NY
—	631-600	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC- NY	384C	W COMMACK	NY
—	631-603	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	RIVERHEAD	NY
—	631-608	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	AMITYVILLE	NY
—	631-610	3XXX6XXX7XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	EASTPORT	NY
—	631-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	NY
—	631-612	0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BABYLON	NY
—	631-613	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC- NY	384C	BRIDGEMPTN	NY
—	631-614	not yet reported which blocks →	ONVOY, LLC- NY	384C	SOUTHAMPTN	NY
—	631-615	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	RONKONKOMA	NY
—	631-618	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	YAPHANK	NY
—	631-619	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TC SYSTEMS, INC. - NY	7140	RONKONKOMA	NY
—	631-621	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	ST JAMES	NY
—	631-622	not yet reported which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-623	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TC SYSTEMS, INC. - NY	7140	W COMMACK	NY
—	631-625	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC- NY	384C	ORIENT	NY
—	631-628	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	NORTHPORT	NY
—	631-630	not yet reported which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	CENTRAISLP	NY
—	631-632	0XXX which blocks →	VERIZON NEW YORK, INC.	9104	STONYBROOK	NY
—	631-635	0–9 XXXall 10 · 5 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	BABYLON	NY
—	631-639	0–9 XXXall 10 · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	BRENTWOOD	NY
—	631-641	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	WATER MILL	NY
—	631-642	6XXX7XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	PTJEFFERSN	NY
—	631-643	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	MIDLAND	NY
—	631-645	not yet reported which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	BRENTWOOD	NY
—	631-647	0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	BAY SHORE	NY
—	631-648	0XXX3XXX7XXX8XXX9XXX which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	RONKONKOMA	NY
—	631-649	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BABYLON	NY
—	631-650	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	ISLIP	NY
—	631-651	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CSC VOICE, LLC	612K	NORTHPORT	NY
—	631-653	0XXX1XXX2XXX7XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	QUOGUE	NY
—	631-654	6XXX which blocks →	VERIZON NEW YORK, INC.	9104	PATCHOGUE	NY
—	631-655	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	RIVERHEAD	NY
—	631-656	0XXX5XXX6XXX8XXX which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	SMITHTOWN	NY
—	631-657	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	ATLANTIC	NY
—	631-659	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	COLDSPGHBR	NY
—	631-660	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	RIVERHEAD	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.