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
2022-08-25	240-955	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MD	071F	LA PLATA	MD
2022-08-25	240-957	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MD	071F	DAMASCS236	MD
2022-08-25	249-278	not yet reported which blocks →	Distributel	082E	Pineal Lake	—
2022-08-25	249-282	not yet reported which blocks →	Distributel	082E	Foleyet	—
2022-08-25	251-409	0–9 XXXwhole prefix which blocks →	ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC	6916	ATMORE	AL
2022-08-25	279-227	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SO PLACER	CA
2022-08-25	314-928	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	732J	ST LOUIS	MO
2022-08-25	316-334	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks →	NUSO, LLC	732J	MOUNT HOPE	KS
2022-08-25	346-584	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	FRIENDSWD	TX
2022-08-25	346-585	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	STAFFORD	TX
2022-08-25	364-215	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	NUSO, LLC	732J	CAMPBELSVL	KY
2022-08-25	365-279	not yet reported which blocks →	Fibernetics Corporation	464D	Clarkson	—
2022-08-25	365-280	not yet reported which blocks →	Fibernetics Corporation	464D	Port Credit	—
2022-08-25	365-281	not yet reported which blocks →	Fibernetics Corporation	464D	Streetsville	—
2022-08-25	434-304	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	732J	DANVILLE	VA
2022-08-25	434-307	0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NUSO, LLC	732J	PALMYRA	VA
2022-08-25	520-654	0–9 XXXall 10 · 5 holders which blocks →	COMMIO, LLC	939H	SIERRAVIST	AZ
2022-08-25	530-843	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	HD CARRIER LLC	321J	CORNING	CA
2022-08-25	559-703	0–9 XXXwhole prefix which blocks →	ONVOY SPECTRUM, LLC	624H	FRESNO	CA
2022-08-25	561-887	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	DELRAY BCH	FL
2022-08-25	562-610	0–9 XXXwhole prefix which blocks →	ONVOY SPECTRUM, LLC	624H	LONG BEACH	CA
2022-08-25	562-710	0–9 XXXwhole prefix which blocks →	ONVOY SPECTRUM, LLC	624H	NORWALK	CA
2022-08-25	563-318	0XXX1XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	TIPTON	IA
2022-08-25	575-286	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALAMOGORDO	NM
2022-08-25	626-645	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	ALHAMBRA	CA
2022-08-25	804-388	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	732J	ASHLAND	VA
2022-08-25	826-204	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	732J	FREDECKSBG	VA
2022-08-25	826-205	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	732J	ROANOKE	VA
2022-08-25	848-332	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	LONGBRANCH	NJ
2022-08-25	856-386	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	BRIDGETON	NJ
2022-08-25	903-864	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	BONHAM	TX
2022-08-25	913-252	0XXX1XXX5XXX7XXX8XXX · 5 holders which blocks →	NUSO, LLC	732J	BASEHOR	KS
2022-08-25	939-346	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	BAYAMONNOR	PR
2022-08-25	939-347	0XXX1XXX3XXX9XXX · 3 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	SAN GERMAN	PR
2022-08-25	945-267	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2022-08-25	945-268	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2022-08-25	979-349	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	ANGLETON	TX
2022-08-25	980-987	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NC	638E	CHARLOTTE	NC
2022-08-24	220-678	0XXX1XXX8XXX9XXX · 3 holders which blocks →	AT&T - LOCAL	7421	SOMERSET	OH
2022-08-24	224-482	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DEERFIELD	IL
2022-08-24	225-493	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	BATONROUGE	LA
2022-08-24	262-310	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	WEST BEND	WI
2022-08-24	346-582	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2022-08-24	346-583	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2022-08-24	479-490	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	ALMA	AR
2022-08-24	484-936	3XXX which blocks →	TERRA NOVA TELECOM INC.	145J	ROBESONIA	PA
2022-08-24	504-429	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	NEWORLEANS	LA
2022-08-24	557-777	0–9 XXXall 10 · 5 holders which blocks →	TERRA NOVA TELECOM INC.	145J	CREVECOEUR	MO
2022-08-24	564-223	1XXX3XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	HAT ISLAND	WA
2022-08-24	602-856	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ

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.