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
2022-08-09	804-810	0XXX1XXX8XXX9XXX · 2 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	CALLAO	VA
2022-08-09	817-661	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WEATHERFD	TX
2022-08-09	920-708	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ALGOMA	WI
2022-08-09	930-380	0XXX which blocks →	COMMIO, LLC	939H	BLOOMINGTN	IN
2022-08-09	945-264	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-09	945-265	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-09	945-266	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-08	308-466	1XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	FRANKLIN	NE
2022-08-08	314-986	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7432	LADUE	MO
2022-08-08	314-987	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	MEHLVILLE	MO
2022-08-08	314-998	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	CREVECOEUR	MO
2022-08-08	364-214	0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	BEE SPRING	KY
2022-08-08	506-287	not yet reported which blocks →	Bragg Communications Inc.	4878	Edmundston	—
2022-08-08	557-200	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	LADUE	MO
2022-08-08	557-467	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MO	093F	ST LOUIS	MO
2022-08-08	753-721	not yet reported which blocks →	Fibernetics Corporation	464D	Elgin	—
2022-08-08	753-722	not yet reported which blocks →	Fibernetics Corporation	464D	Lanark	—
2022-08-08	753-723	not yet reported which blocks →	Fibernetics Corporation	464D	Maberly	—
2022-08-08	753-724	not yet reported which blocks →	Fibernetics Corporation	464D	McDonalds Corners	—
2022-08-08	753-725	not yet reported which blocks →	Fibernetics Corporation	464D	Perth	—
2022-08-08	753-726	not yet reported which blocks →	Fibernetics Corporation	464D	Portland	—
2022-08-08	753-727	not yet reported which blocks →	Fibernetics Corporation	464D	Toledo	—
2022-08-08	878-261	2XXX6XXX7XXX8XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	FREEPORT	PA
2022-08-08	939-356	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	MANATI	PR
2022-08-08	943-203	0–9 XXXall 10 · 7 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	ATLANTA	GA
2022-08-08	947-813	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	NORTHVILLE	MI
2022-08-05	224-474	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DESPLAINES	IL
2022-08-05	240-943	0XXX2XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	FROSTBURG	MD
2022-08-05	251-399	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - AL	604E	EVERGREEN	AL
2022-08-05	251-403	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	FOLEY	AL
2022-08-05	254-341	0XXX9XXX · 2 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	ITASCA	TX
2022-08-05	254-443	0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	GLEN ROSE	TX
2022-08-05	302-618	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NEW CASTLE	DE
2022-08-05	332-268	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN01	NY
2022-08-05	413-484	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MA	892D	PALMER	MA
2022-08-05	682-381	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	ARLINGTON	TX
2022-08-05	762-314	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ROME	GA
2022-08-05	826-203	0–9 XXXall 10 · 3 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	CHANCELLOR	VA
2022-08-05	872-316	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN07	IL
2022-08-05	915-310	0XXX9XXX · 2 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	DESERT HVN	TX
2022-08-05	945-263	3XXX9XXX · 2 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	BARDWELL	TX
2022-08-05	951-614	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	ELSINORE	CA
2022-08-04	380-252	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	WESTERVL	OH
2022-08-04	509-425	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	SPOKANE	WA
2022-08-04	515-912	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IA	985E	INDIANOLA	IA
2022-08-04	531-288	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MADISON	NE
2022-08-04	548-639	not yet reported which blocks →	Iristel Inc.	154E	Belmont	—
2022-08-04	639-446	not yet reported which blocks →	Fibernetics Corporation	464D	Dinsmore	—
2022-08-04	639-447	not yet reported which blocks →	Fibernetics Corporation	464D	Lanigan	—
2022-08-04	639-448	not yet reported which blocks →	Fibernetics Corporation	464D	Lucky Lake	—

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.