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
2013-03-08	516-387	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF NEW YORK, LLC - NY	155E	NASSAUZN01	NY
2013-03-08	517-295	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2013-03-08	530-358	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	NOSAN JUAN	CA
2013-03-08	530-491	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	MARYSVILLE	CA
2013-03-08	530-497	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	PLVL WEST	CA
2013-03-08	540-393	0XXX1XXX3XXX6XXX7XXX8XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	ROCKYMOUNT	VA
2013-03-08	540-795	0–9 XXXall 10 · 8 holders which blocks →	NUSO, LLC	551G	ROANOKE	VA
2013-03-08	540-881	0–9 XXXall 10 · 2 holders which blocks →	NUSO, LLC	551G	CULPEPER	VA
2013-03-08	587-439	not yet reported which blocks →	Bell Mobility	6574	Calgary	—
2013-03-08	605-681	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	SIOUX FLS	SD
2013-03-08	608-421	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	MADISON	WI
2013-03-08	616-303	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	GREENVILLE	MI
2013-03-08	707-298	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	EUREKA	CA
2013-03-08	707-329	0–9 XXXall 10 · 8 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SEBASTOPOL	CA
2013-03-08	707-390	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	PEPPERWOOD	CA
2013-03-08	707-492	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	NAPA	CA
2013-03-08	707-617	0–9 XXXall 10 · 9 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	FORTUNA	CA
2013-03-08	707-625	0–9 XXXall 10 · 8 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	FORESTVL	CA
2013-03-08	707-663	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	TMCV TMCV	CA
2013-03-08	714-332	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BREA	CA
2013-03-08	715-714	1XXX2XXX4XXX5XXX7XXX · 2 holders which blocks →	NUSO, LLC	551G	EAU CLAIRE	WI
2013-03-08	747-220	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	AGOURA	CA
2013-03-08	747-223	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BRBN SNVY	CA
2013-03-08	747-322	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNFN SNFN	CA
2013-03-08	760-313	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EAGLE MT	CA
2013-03-08	760-503	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	VTVL APVY	CA
2013-03-08	902-397	not yet reported which blocks →	Bell Mobility Aliant	329A	Amherst	—
2013-03-08	920-489	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	GREEN BAY	WI
2013-03-07	205-224	0–9 XXXall 10 · 6 holders which blocks →	PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS	9736	BIRMINGHAM	AL
2013-03-07	251-307	0–9 XXXall 10 · 4 holders which blocks →	PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS	9736	MOBILE	AL
2013-03-07	260-240	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	FORT WAYNE	IN
2013-03-07	276-598	0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	RICHLANDS	VA
2013-03-07	314-696	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	ST LOUIS	MO
2013-03-07	334-630	0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	HUGULEY	AL
2013-03-07	405-534	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OKLA CITY	OK
2013-03-07	510-646	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	OKLD BKLY	CA
2013-03-07	786-609	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2013-03-07	819-831	not yet reported which blocks →	ISP Telecom Inc.	4727	Val-D'Or	—
2013-03-07	857-317	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BOSTON	MA
2013-03-07	980-292	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NC	998E	KINGS MT	NC
2013-03-06	570-914	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NUSO, LLC	551G	SCRANTON	PA
2013-03-06	615-920	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	NASHVILLE	TN
2013-03-06	681-284	0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	BRAMWELL	WV
2013-03-06	814-843	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	ALTOONA	PA
2013-03-06	980-325	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ANSONVILLE	NC
2013-03-06	980-698	6XXX8XXX9XXX · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HARMONY	NC
2013-03-05	204-906	not yet reported which blocks →	Bell Mobility	6574	Stonewall	—
2013-03-05	226-376	not yet reported which blocks →	Bell Mobility	6574	London	—
2013-03-05	323-591	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	LSAN DA 13	CA
2013-03-05	438-488	not yet reported which blocks →	Fibernetics Corporation	464D	Montreal	—

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.