Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2005-04-04	704-981	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	SCRWDRSCRK	NC
2005-04-04	785-844	4XXX5XXX6XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS	6532	WAMEGO	KS
2005-04-04	786-718	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	MIAMI	FL
2005-04-01	307-586	not yet reported which blocks →	TRI TEL, INC.	7466	CODY	WY
2005-04-01	307-764	not yet reported which blocks →	TRI TEL, INC.	7466	POWELL	WY
2005-04-01	347-713	0–9 XXXall 10 · 4 holders which blocks →	CSC VOICE, LLC	612K	NWYRCYZN07	NY
2005-04-01	631-932	0–9 XXXall 10 · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	DEER PARK	NY
2005-04-01	724-849	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks →	ARMSTRONG TELECOMMUNICATIONS, INC. - PA	422C	MAMMOTH	PA
2005-04-01	970-830	0XXX7XXX · 2 holders which blocks →	ONVOY, LLC - CO	026D	PARACHUTE	CO
2005-03-31	347-787	0–9 XXXall 10 · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	NWYRCYZN06	NY
2005-03-31	407-965	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	ORLANDO	FL
2005-03-31	561-340	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	WPALMBEACH	FL
2005-03-31	801-769	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PLEASATGRV	UT
2005-03-31	813-919	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TAMPA	FL
2005-03-31	850-512	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	PENSACOLA	FL
2005-03-30	224-366	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	ELK GROVE	IL
2005-03-30	320-377	1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MN	5256	GROVE CITY	MN
2005-03-30	347-873	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN05	NY
2005-03-30	423-845	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	BRISTOL	TN
2005-03-30	450-214	not yet reported which blocks →	Videotron Ltd.	8306	St-Calixte-de-Kilkenny	—
2005-03-30	450-215	not yet reported which blocks →	Videotron Ltd.	8306	St-Lin	—
2005-03-30	615-691	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	MURFREESBO	TN
2005-03-30	646-624	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN01	NY
2005-03-30	662-765	1XXX2XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	STARKVILLE	MS
2005-03-30	909-684	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	FONTANA	CA
2005-03-30	951-445	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	MURRIETA	CA
2005-03-29	215-207	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	PHLDLPHZN1	PA
2005-03-29	404-604	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	ATLANTA	GA
2005-03-29	518-705	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	JOHNSTOWN	NY
2005-03-29	606-304	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	CORBIN	KY
2005-03-29	618-240	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	MT CARMEL	IL
2005-03-29	618-733	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL	846F	CARTERVL	IL
2005-03-29	928-434	not yet reported which blocks →	SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA	4146	SHOW LOW	AZ
2005-03-28	210-818	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	SANANTONIO	TX
2005-03-28	224-538	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	WAUKEGAN	IL
2005-03-28	313-447	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	DETROITZN2	MI
2005-03-28	317-644	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - IN	097D	INDIANAPLS	IN
2005-03-28	540-308	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	ORANGE	VA
2005-03-28	601-333	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	FOREST	MS
2005-03-28	601-548	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	GLOSTER	MS
2005-03-28	601-662	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	DE KALB	MS
2005-03-28	601-805	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	CENTREVL	MS
2005-03-28	601-820	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	UNION	MS
2005-03-28	601-836	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	PHILA	MS
2005-03-28	601-865	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	WOODVILLE	MS
2005-03-28	601-887	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	NEWTONHKRY	MS
2005-03-28	601-905	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	PORTGIBSON	MS
2005-03-28	601-972	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	LIBERTY	MS
2005-03-28	620-282	5XXX6XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS	6532	GREAT BEND	KS
2005-03-28	662-777	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	TUNICA	MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.