Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19

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
2016-05-19	737-302	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	SMITHVILLE	TX
2016-05-19	737-747	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	BURNET	TX
2016-05-19	762-572	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - GA	067D	WOODBURY	GA
2016-05-19	867-205	not yet reported which blocks →	SSi Micro Ltd.	940G	Arviat	—
2016-05-19	867-207	not yet reported which blocks →	SSi Micro Ltd.	940G	Baker Lake	—
2016-05-19	956-747	0–9 XXXall 10 · 6 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	BROWNSVL	TX
2016-05-18	219-407	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - IN	7314	HAMMOND	IN
2016-05-18	225-480	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	DENHAM SPG	LA
2016-05-18	318-569	0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - LA	749E	MOORINGSPT	LA
2016-05-18	318-591	0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks →	ONVOY, LLC - LA	749E	OIL CITY	LA
2016-05-18	318-706	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - LA	749E	HAUGHTON	LA
2016-05-18	318-708	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	MINDEN	LA
2016-05-18	318-818	0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - LA	749E	NEWELLTON	LA
2016-05-18	380-202	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	REYNOLDSBG	OH
2016-05-18	480-482	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-05-18	587-497	not yet reported which blocks →	TELUS	8084	Edmonton	—
2016-05-18	867-670	not yet reported which blocks →	Iristel Inc.	154E	Tuktoyaktuk	—
2016-05-18	971-940	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	PORTLAND	OR
2016-05-18	985-316	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	THIBODAUX	LA
2016-05-17	209-802	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	NEWMAN	CA
2016-05-17	318-643	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - LA	749E	HARRISONBG	LA
2016-05-17	331-227	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	SUGARGROVE	IL
2016-05-17	413-707	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	SPRINGFLD	MA
2016-05-17	551-268	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	UNION CITY	NJ
2016-05-17	629-303	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN	7977	NASHVILLE	TN
2016-05-17	657-332	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SILVERADO	CA
2016-05-17	702-840	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV	6458	LAS VEGAS	NV
2016-05-17	786-675	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	MIAMI	FL
2016-05-17	786-971	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL	8664	KEYS	FL
2016-05-16	209-237	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7128	TRACY	CA
2016-05-16	209-278	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	TRACY	CA
2016-05-16	424-318	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	TORRANCE	CA
2016-05-16	657-329	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HUNTITNBCH	CA
2016-05-16	682-410	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ARLINGTON	TX
2016-05-16	716-323	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	BUFFALO	NY
2016-05-16	909-479	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	CHINO	CA
2016-05-16	916-280	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ELK GROVE	CA
2016-05-16	939-213	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	CAYEY	PR
2016-05-16	951-412	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MURRIETA	CA
2016-05-16	971-401	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	PORTLAND	OR
2016-05-13	236-387	not yet reported which blocks →	Navigata Communications Limited	078G	Chief Lake	—
2016-05-13	236-388	not yet reported which blocks →	Navigata Communications Limited	078G	Chilako	—
2016-05-13	236-389	not yet reported which blocks →	Navigata Communications Limited	078G	Clinton	—
2016-05-13	236-390	not yet reported which blocks →	Navigata Communications Limited	078G	Cluculz Lake	—
2016-05-13	236-391	not yet reported which blocks →	Navigata Communications Limited	078G	Decker Lake	—
2016-05-13	236-392	not yet reported which blocks →	Navigata Communications Limited	078G	Dunster	—
2016-05-13	236-393	not yet reported which blocks →	Navigata Communications Limited	078G	Fort Fraser	—
2016-05-13	236-394	not yet reported which blocks →	Navigata Communications Limited	078G	Francois Lake	—
2016-05-13	236-395	not yet reported which blocks →	Navigata Communications Limited	078G	Fraser Lake	—
2016-05-13	236-396	not yet reported which blocks →	Navigata Communications Limited	078G	Giscome	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.