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
2014-06-03	289-541	not yet reported which blocks →	Bell Mobility	6574	Brampton	—
2014-06-03	289-556	not yet reported which blocks →	Bell Mobility	6574	Hamilton	—
2014-06-03	352-744	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	TAVARES	FL
2014-06-03	551-227	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	JERSEYCITY	NJ
2014-06-03	575-425	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	TAOS	NM
2014-06-03	581-313	not yet reported which blocks →	Bell Mobility	6574	Quebec	—
2014-06-03	650-727	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SAN MATEO	CA
2014-06-03	720-609	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DENVER	CO
2014-06-02	315-929	0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	CONSTANTIA	NY
2014-06-02	315-954	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	UNION SPG	NY
2014-06-02	402-303	0–9 XXXall 10 · 5 holders which blocks →	GLENWOOD TELECOMMUNICATIONS, INC. - NE	885E	HASTINGS	NE
2014-06-02	415-872	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	SNFC CNTRL	CA
2014-06-02	415-969	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SNFC CNTRL	CA
2014-06-02	551-225	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NJ	118F	JERSEYCITY	NJ
2014-06-02	646-740	0–9 XXXall 10 · 3 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NWYRCYZN01	NY
2014-06-02	646-838	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN01	NY
2014-06-02	646-844	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN01	NY
2014-06-02	813-605	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	TAMPACEN	FL
2014-06-02	949-426	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CAPITRNVLY	CA
2014-05-30	209-851	0–9 XXXall 10 · 8 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	STOCKTON	CA
2014-05-30	289-405	not yet reported which blocks →	Bell Mobility	6574	Oshawa	—
2014-05-30	314-240	0–9 XXXall 10 · 3 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ST LOUIS	MO
2014-05-30	343-540	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2014-05-30	506-349	not yet reported which blocks →	Bell Mobility Aliant	329A	Saint John	—
2014-05-30	517-457	0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	TIPTON	MI
2014-05-30	585-622	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	ROCHESTER	NY
2014-05-30	586-460	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	ARMADA	MI
2014-05-30	587-346	not yet reported which blocks →	Bell Mobility	6574	Edmonton	—
2014-05-30	587-348	not yet reported which blocks →	Bell Mobility	6574	Grande Prairie	—
2014-05-30	587-378	not yet reported which blocks →	Bell Mobility	6574	Red Deer	—
2014-05-30	587-833	not yet reported which blocks →	Bell Mobility	6574	Calgary	—
2014-05-30	587-919	not yet reported which blocks →	Bell Mobility	6574	Fort McMurray	—
2014-05-30	647-545	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2014-05-30	660-478	1XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	EAGLEVILLE	MO
2014-05-30	716-331	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BUFFALO	NY
2014-05-30	734-235	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	IDA	MI
2014-05-30	734-275	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	PINCKNEY	MI
2014-05-30	734-820	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	MAYBEE	MI
2014-05-30	778-392	not yet reported which blocks →	Bell Mobility	6574	Kelowna	—
2014-05-30	778-905	not yet reported which blocks →	Bell Mobility	6574	Vancouver	—
2014-05-30	810-202	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	FLUSHING	MI
2014-05-30	810-321	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	JEDDO	MI
2014-05-30	816-515	0XXX1XXX2XXX5XXX6XXX7XXX · 6 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	EAST LYNNE	MO
2014-05-30	816-620	0XXX1XXX2XXX4XXX5XXX6XXX · 6 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	PECULIAR	MO
2014-05-30	816-755	0XXX1XXX2XXX3XXX4XXX5XXX · 6 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	GARDENCITY	MO
2014-05-30	816-928	0XXX1XXX4XXX · 3 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	DREXEL	MO
2014-05-30	929-259	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN03	NY
2014-05-30	952-228	0–9 XXXall 10 · 3 holders which blocks →	SCOTT RICE TEL. CO. DBA INTEGRA TELECOM	1479	TWINCITIES	MN
2014-05-29	480-405	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2014-05-29	515-454	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IA	985E	STUART	IA

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.