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
2012-09-19	832-625	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	HOUSTON	TX
2012-09-18	204-710	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Rivers	—
2012-09-18	438-765	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2012-09-18	587-524	not yet reported which blocks →	Shaw Telecom Inc.	497E	Edmonton	—
2012-09-17	252-513	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	AHOSKIE	NC
2012-09-17	440-504	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	BEREA	OH
2012-09-17	520-460	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	TUCSON	AZ
2012-09-17	734-515	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WHITMORELK	MI
2012-09-17	951-383	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	TEMECULA	CA
2012-09-14	208-916	0–9 XXXall 10 · 3 holders which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4321	COERDALENE	ID
2012-09-14	510-775	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	OKLD ALMD	CA
2012-09-14	530-379	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	WOODLAND	CA
2012-09-14	605-679	0–9 XXXall 10 · 6 holders which blocks →	QWEST CORPORATION	9631	SIOUX FLS	SD
2012-09-14	817-941	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	ARLINGTON	TX
2012-09-14	843-231	0–9 XXXall 10 · 4 holders which blocks →	FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC	4335	MYRTLE BCH	SC
2012-09-14	906-666	7XXX which blocks →	CLEAR RATE COMMUNICATIONS, LLC	046L	MARQUETTE	MI
2012-09-13	317-719	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN	6725	INDIANAPLS	IN
2012-09-13	581-596	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Dolbeau	—
2012-09-13	581-597	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Desbiens	—
2012-09-13	581-598	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Delisle	—
2012-09-13	581-599	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Chute-des-Passes	—
2012-09-13	581-601	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Albanel	—
2012-09-13	581-602	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Chambord	—
2012-09-13	587-349	not yet reported which blocks →	Shaw Telecom Inc.	497E	Calgary	—
2012-09-12	540-750	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	BLACKSBURG	VA
2012-09-12	602-552	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	PHOENIX	AZ
2012-09-11	201-713	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	UNION CITY	NJ
2012-09-11	207-530	0–9 XXXall 10 · 4 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	AUGUSTA	ME
2012-09-11	281-665	0–9 XXXall 10 · 4 holders which blocks →	CONSOLIDATED COMMUNICATIONS OF TEXAS COMPANY	2109	KATY	TX
2012-09-11	312-619	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2012-09-11	458-202	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - OR	750E	BEND	OR
2012-09-11	504-503	0–9 XXXall 10 · 3 holders which blocks →	HUNT TELECOMMUNICATIONS, LLC - LA	181D	NEWORLEANS	LA
2012-09-11	561-331	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	WPALMBEACH	FL
2012-09-11	581-589	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Milot	—
2012-09-11	581-590	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Metabetchouan	—
2012-09-11	581-591	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Lac Bouchette	—
2012-09-11	581-592	not yet reported which blocks →	Telecommunications Xittel Inc	247F	La Dore	—
2012-09-11	581-593	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Hebertville-Station	—
2012-09-11	581-594	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Hebertville	—
2012-09-11	581-595	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Girardville	—
2012-09-11	602-872	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	PHOENIX	AZ
2012-09-11	609-830	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	AT&T - LOCAL	7421	AVALON	NJ
2012-09-11	828-639	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	HICKORY	NC
2012-09-10	240-224	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GAITHERSBG	MD
2012-09-10	240-309	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	LEONARDTN	MD
2012-09-10	319-559	0–9 XXXall 10 · 5 holders which blocks →	UNITED STATES CELLULAR - IA	6266	WAVERLY	IA
2012-09-10	581-582	not yet reported which blocks →	Telecommunications Xittel Inc	247F	St-Gedeon	—
2012-09-10	581-583	not yet reported which blocks →	Telecommunications Xittel Inc	247F	St-Felicien	—
2012-09-10	581-584	not yet reported which blocks →	Telecommunications Xittel Inc	247F	St-Prime	—
2012-09-10	581-585	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Roberval	—

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.