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
2012-10-19	862-300	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	NEWARK	NJ
2012-10-18	210-571	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SANANTONIO	TX
2012-10-18	352-440	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	OLD TOWN	FL
2012-10-18	352-559	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	GAINESVL	FL
2012-10-18	386-301	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	DAYTONABCH	FL
2012-10-18	401-442	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PROVIDENCE	RI
2012-10-18	407-502	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	ORLANDO	FL
2012-10-18	407-633	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - FL	937C	ORLANDO	FL
2012-10-18	414-400	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - WI	225C	MILWAUKZN1	WI
2012-10-18	425-435	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
2012-10-18	516-595	0–9 XXXall 10 · 6 holders which blocks →	CSC VOICE, LLC	612K	NASSAUZN08	NY
2012-10-18	561-260	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	WPALMBEACH	FL
2012-10-18	581-294	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Clarke City	—
2012-10-18	581-295	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Chevery	—
2012-10-18	581-296	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Bonne-Esperance	—
2012-10-18	581-297	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Blanc-Sablon	—
2012-10-18	581-298	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Baie-Johan-Beetz	—
2012-10-18	581-299	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Aguanish	—
2012-10-18	581-301	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Tete-a-la-Baleine	—
2012-10-18	581-302	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Saint-Augustin (Duplessis)	—
2012-10-18	581-303	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Sept-Iles	—
2012-10-18	581-304	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Riviere-au-Tonnerre	—
2012-10-18	786-509	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2012-10-18	786-516	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2012-10-18	972-885	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	DALLAS	TX
2012-10-17	208-501	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	BOISE	ID
2012-10-17	262-777	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - WI	225C	MILWAUKZN2	WI
2012-10-17	302-203	0–9 XXXall 10 · 4 holders which blocks →	VERIZON DELAWARE, INC.	9210	MIDDLETOWN	DE
2012-10-17	505-395	0–9 XXXall 10 · 8 holders which blocks →	NUSO, LLC	551G	SANTA FE	NM
2012-10-17	512-920	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	AUSTIN	TX
2012-10-17	581-284	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Riviere-Saint-Jean	—
2012-10-17	581-285	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Port-Cartier	—
2012-10-17	581-286	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Port-Menier	—
2012-10-17	581-287	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Pentecote	—
2012-10-17	581-288	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Natashquan	—
2012-10-17	581-289	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Mutton Bay	—
2012-10-17	581-290	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Moisie	—
2012-10-17	581-291	not yet reported which blocks →	Telecommunications Xittel Inc	247F	La Romaine	—
2012-10-17	581-292	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Havre-Saint-Pierre	—
2012-10-17	581-293	not yet reported which blocks →	Telecommunications Xittel Inc	247F	Harrington Harbour	—
2012-10-17	706-750	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	AUGUSTA	GA
2012-10-17	719-424	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	COLORDOSPG	CO
2012-10-17	720-588	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	DENVER	CO
2012-10-17	740-781	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	HORIZON SERVICES, INC. - OH	601G	CAMBRIDGE	OH
2012-10-17	832-740	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	HOUSTON	TX
2012-10-17	912-436	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	SAVANNAH	GA
2012-10-17	937-706	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	SOCHARLETN	OH
2012-10-17	937-801	0XXX1XXX6XXX8XXX · 4 holders which blocks →	HORIZON SERVICES, INC. - OH	601G	GEORGETOWN	OH
2012-10-16	314-399	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	ST LOUIS	MO
2012-10-16	408-797	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SNJS NORTH	CA

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.