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
—	631-420	none assigned yet which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-421	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-422	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	BABYLON	NY
—	631-423	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-424	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-425	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-427	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	HUNTINGTON	NY
—	631-431	9XXX which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	CENTRAISLP	NY
—	631-432	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BRENTWOOD	NY
—	631-434	0XXX5XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	BRENTWOOD	NY
—	631-435	5XXX which blocks →	VERIZON NEW YORK, INC.	9104	BRENTWOOD	NY
—	631-436	1XXX3XXX8XXX9XXX · 4 holders which blocks →	VERIZON NEW YORK, INC.	9104	BRENTWOOD	NY
—	631-439	not yet reported which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	CENTRAISLP	NY
—	631-440	0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	FIREISLAND	NY
—	631-441	not yet reported which blocks →	SPOK, INC.	6630	BRENTWOOD	NY
—	631-442	not yet reported which blocks →	SPOK, INC.	6630	BRENTWOOD	NY
—	631-443	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	EASTPORT	NY
—	631-444	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	STONYBROOK	NY
—	631-447	4XXX which blocks →	VERIZON NEW YORK, INC.	9104	PATCHOGUE	NY
—	631-450	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC- NY	384C	LINDENHST	NY
—	631-451	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	SELDEN	NY
—	631-453	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	SELDEN	NY
—	631-454	none assigned yet which blocks →	VERIZON NEW YORK, INC.	9104	FARMINGDL	NY
—	631-455	not yet reported which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	DEER PARK	NY
—	631-457	0XXX2XXX3XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	BRENTWOOD	NY
—	631-458	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	SAG HARBOR	NY
—	631-460	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	KINGS PARK	NY
—	631-462	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	W COMMACK	NY
—	631-463	0XXX which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	CENTRAISLP	NY
—	631-465	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
—	631-466	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	RIVERHEAD	NY
—	631-467	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-468	6XXX7XXX8XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-470	none assigned yet which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	HUNTINGTON	NY
—	631-471	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	RONKONKOMA	NY
—	631-472	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	BAYPORT	NY
—	631-473	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	PTJEFFERSN	NY
—	631-474	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	PTJEFFERSN	NY
—	631-475	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	PATCHOGUE	NY
—	631-476	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	PTJEFFERSN	NY
—	631-477	5XXX6XXX7XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	GREENPORT	NY
—	631-478	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	BRENTWOOD	NY
—	631-479	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	HUNTINGTON	NY
—	631-481	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	ISLIP	NY
—	631-485	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	MIDLAND	NY
—	631-486	0XXX2XXX4XXX6XXX8XXX9XXX · 2 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	W COMMACK	NY
—	631-489	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	W COMMACK	NY
—	631-491	2XXX which blocks →	VERIZON NEW YORK, INC.	9104	MIDLAND	NY
—	631-492	0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON NEW YORK, INC.	9104	DEER PARK	NY
—	631-493	7XXX8XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	W COMMACK	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.