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
—	631-495	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BRENTWOOD	NY
—	631-498	4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	COLDSPGHBR	NY
—	631-499	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	W COMMACK	NY
—	631-500	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC- NY	384C	WATER MILL	NY
—	631-501	none assigned yet which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-503	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC. - NY	7140	CTRMORICHS	NY
—	631-506	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	VERIZON NEW YORK, INC.	9104	RIVERHEAD	NY
—	631-510	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	MIDLAND	NY
—	631-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	NY
—	631-513	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BRENTWOOD	NY
—	631-514	1XXX4XXX5XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	BRENTWOOD	NY
—	631-517	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BABYLON	NY
—	631-520	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	AMITYVILLE	NY
—	631-521	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF NEW YORK, LP - NY	8473	BRENTWOOD	NY
—	631-523	0XXX which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	CENTRAISLP	NY
—	631-528	1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	KINGS PARK	NY
—	631-529	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC- NY	384C	ORIENT	NY
—	631-531	2XXX which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-532	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	AMITYVILLE	NY
—	631-534	1XXX2XXX3XXX7XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	COLDSPGHBR	NY
—	631-536	3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	EASTPORT	NY
—	631-537	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	BRIDGEMPTN	NY
—	631-538	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SELDEN	NY
—	631-539	1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	BABYLON	NY
—	631-541	none assigned yet which blocks →	VERIZON NEW YORK, INC.	9104	NASSAUZN09	NY
—	631-543	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	COMMACK	NY
—	631-544	1XXX2XXX7XXX8XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	KINGS PARK	NY
—	631-546	0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	HUNTINGTON	NY
—	631-547	2XXX3XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-548	1XXX5XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	RIVERHEAD	NY
—	631-549	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-551	1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	ST JAMES	NY
—	631-553	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BRENTWOOD	NY
—	631-554	not yet reported which blocks →	SPOK, INC.	6630	BRENTWOOD	NY
—	631-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	NY
—	631-557	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC- NY	384C	AMAGANSETT	NY
—	631-558	not yet reported which blocks →	SPOK, INC.	6630	RIVERHEAD	NY
—	631-561	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	SELDEN	NY
—	631-563	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	SAYVILLE	NY
—	631-564	not yet reported which blocks →	PAETEC ITEL, LLC	829J	SAYVILLE	NY
—	631-567	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	SAYVILLE	NY
—	631-568	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	AMITYVILLE	NY
—	631-570	2XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	FIREISLAND	NY
—	631-574	0XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	RIVERHEAD	NY
—	631-576	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	PATCHOGUE	NY
—	631-577	none assigned yet which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-580	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-581	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	ISLIP	NY
—	631-582	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	CENTRAISLP	NY
—	631-583	1XXX3XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	FIREISLAND	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.