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
2013-03-05	581-305	not yet reported which blocks →	Bell Mobility	6574	Quebec	—
2013-03-05	581-531	not yet reported which blocks →	Comwave Networks	160G	Quebec	—
2013-03-05	587-338	not yet reported which blocks →	Bell Mobility	6574	Edmonton	—
2013-03-05	587-997	not yet reported which blocks →	Fibernetics Corporation	464D	Calgary	—
2013-03-05	760-528	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	HOLTVILLE	CA
2013-03-05	819-431	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2013-03-05	867-223	not yet reported which blocks →	Bell Mobility	6574	Iqaluit	—
2013-03-05	909-371	0–9 XXXall 10 · 6 holders which blocks →	METROPCS NETWORKS, LLC	899D	FONTANA	CA
2013-03-04	210-801	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SANANTONIO	TX
2013-03-04	270-620	0XXX1XXX · 2 holders which blocks →	NUSO, LLC	551G	OWENSBORO	KY
2013-03-04	308-318	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	NUSO, LLC	551G	GRAND IS	NE
2013-03-04	325-301	0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	NUSO, LLC	551G	SAN ANGELO	TX
2013-03-04	409-203	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	BEAUMONT	TX
2013-03-04	432-219	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	MIDLAND	TX
2013-03-04	516-725	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NASSAUZN02	NY
2013-03-04	607-297	0–9 XXXall 10 · 2 holders which blocks →	NUSO, LLC	551G	BINGHAMTON	NY
2013-03-04	669-721	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SUNNYVALE	CA
2013-03-04	701-955	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks →	NUSO, LLC	551G	BISMARCK	ND
2013-03-04	737-444	0–9 XXXall 10 · 5 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	GEORGETOWN	TX
2013-03-04	737-666	0–9 XXXall 10 · 9 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	ELGIN	TX
2013-03-04	737-888	0–9 XXXall 10 · 7 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	TAYLOR	TX
2013-03-04	737-999	0–9 XXXall 10 · 6 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	BUDA	TX
2013-03-04	806-502	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NUSO, LLC	551G	AMARILLO	TX
2013-03-04	832-787	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX	7239	HSTNSUBURB	TX
2013-03-04	843-702	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	FLORENCE	SC
2013-03-04	845-745	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	MAHOPAC	NY
2013-03-04	850-704	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	PANAMACITY	FL
2013-03-04	850-760	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	PENSACOLA	FL
2013-03-04	915-206	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	EL PASO	TX
2013-03-04	916-246	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7128	SCRM NORTH	CA
2013-03-04	917-717	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN10	NY
2013-03-04	917-979	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN15	NY
2013-03-04	940-217	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	WICHITAFLS	TX
2013-03-01	252-262	1XXX2XXX3XXX4XXX6XXX7XXX · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MOSS HILL	NC
2013-03-01	336-652	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	KIMESVILLE	NC
2013-03-01	365-800	not yet reported which blocks →	Iristel Inc.	154E	Oshawa	—
2013-03-01	406-878	2XXX8XXX · 2 holders which blocks →	NUSO, LLC	732J	GREATFALLS	MT
2013-03-01	437-800	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2013-03-01	450-345	not yet reported which blocks →	9164-3122 Quebec inc	843D	Pierreville	—
2013-03-01	469-513	0–9 XXXall 10 · 6 holders which blocks →	INTEGRATED PATH COMMUNICATIONS, LLC - TX	951G	DALLAS	TX
2013-03-01	512-717	0–9 XXXall 10 · 3 holders which blocks →	PEERLESS NETWORK OF TEXAS, LLC - TX	177F	AUSTIN	TX
2013-03-01	587-589	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2013-03-01	587-590	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2013-03-01	609-901	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	NEW EGYPT	NJ
2013-03-01	705-915	not yet reported which blocks →	Comwave Networks	160G	Barrie	—
2013-03-01	720-613	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HUDSON	CO
2013-03-01	737-333	0–9 XXXall 10 · 3 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	AUSTIN	TX
2013-03-01	862-304	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	PASSAIC	NJ
2013-03-01	979-207	0–9 XXXwhole prefix which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	BRYAN	TX
2013-02-28	208-497	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID	678B	IDAHOFALLS	ID

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.