Data as of Nov 8, 2026

204.146.0.0/16

No anonymizer space · no proxy exits in 30 days

AT&T Enterprises, LLC

Announcement

this exact prefix

RPKI valid

Announced by

AS7018

Type

Residential

>99% of it

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
204.146.0.0/16	65,536	ATT-204-146-0-0-C	AT&T Enterprises, LLC (AEL-360) · US	Direct Allocation	Sep 12, 1994	abuse@att.net
└ 204.146.0.0 - 204.146.18.255	4,864	EXECNET-NET1	unknown	—	—	—
└ 204.146.32.0/23	512	ADVANTIS-TESTNET	unknown	—	—	—
└ 204.146.36.0/23	512	ADVANTIS-TESTNET-36	unknown	—	—	—
└ 204.146.48.0/24	256	JWPEPPER	unknown	—	—	—
└ 204.146.49.0/24	256	EDUQUEST	unknown	—	—	—
└ 204.146.50.0/24	256	BRS-50	unknown	—	—	—
└ 204.146.51.0/24	256	EQUIFAX51	unknown	—	—	—
└ 204.146.52.0/24	256	EPCOT	unknown	—	—	—
└ 204.146.53.0/24	256	ESSELTE	unknown	—	—	—
└ 204.146.54.0/24	256	IBM-TECH-SERV-NET	unknown	—	—	—
└ 204.146.56.0/22	1,024	FREDDIE56	unknown	—	—	—
└ 204.146.91.0/24	256	XIP-SLIP-RING	unknown	—	—	—
└ 204.146.92.0/24	256	IMC-GLOBAL	unknown	—	—	—
└ 204.146.93.0/24	256	TRAVELERS	unknown	—	—	—
└ 204.146.94.0/24	256	CDRS-NET	unknown	—	—	—
└ 204.146.95.0/24	256	NT-A-NET	unknown	—	—	—
└ 204.146.96.0/24	256	LORAL-NET	unknown	—	—	—
└ 204.146.97.0/24	256	QRS-NET	unknown	—	—	—
└ 204.146.98.0 - 204.146.100.255	768	LUSKI-NET	unknown	—	—	—
└ 204.146.101.0/24	256	MQM-ADVANTIS-NET	unknown	—	—	—
└ 204.146.102.0/23	512	MARYLAND-NET	unknown	—	—	—
└ 204.146.104.0/24	256	TUTTLE-NET	unknown	—	—	—
└ 204.146.105.0/24	256	HAMMOND-NET	unknown	—	—	—
└ 204.146.106.0/24	256	CHURCH-NET	unknown	—	—	—
└ 204.146.107.0/24	256	GOODYS	unknown	—	—	—
└ 204.146.108.0 - 204.146.110.255	768	IMC-GLOBAL-BLK	unknown	—	—	—
└ 204.146.111.0/24	256	BALDOR-NET	unknown	—	—	—
└ 204.146.112.0/24	256	ADVANTIS-204-146-112	unknown	—	—	—
└ 204.146.113.0/24	256	KBCNET	unknown	—	—	—
└ 204.146.114.0/24	256	INFOTECH-114	unknown	—	—	—
└ 204.146.115.0/24	256	LUZENAC-115	unknown	—	—	—
└ 204.146.116.0/24	256	ZOOT	unknown	—	—	—
└ 204.146.117.0/24	256	LUZENAC-117	unknown	—	—	—
└ 204.146.118.0/24	256	FREDDIE-118	unknown	—	—	—
└ 204.146.119.0/24	256	HDDSNET	unknown	—	—	—
└ 204.146.120.0/24	256	AYCNET	unknown	—	—	—
└ 204.146.122.0/24	256	PTBINET-122	unknown	—	—	—
└ 204.146.123.0/24	256	PTBINET-123	unknown	—	—	—
└ 204.146.124.0/24	256	INFOTECH-124	unknown	—	—	—
└ 204.146.125.0/24	256	SINET-125	unknown	—	—	—
└ 204.146.126.0/24	256	SINET-126	unknown	—	—	—
└ 204.146.127.0/24	256	ROADWAY-127	unknown	—	—	—
└ 204.146.128.0/24	256	BOXERJAM-NET	unknown	—	—	—
└ 204.146.129.0 - 204.146.132.255	1,024	IBM-FALLS-CHURCH-NET	unknown	—	—	—
└ 204.146.133.0/24	256	IBM-POUGHKEEPSIE-NET	unknown	—	—	—
└ 204.146.134.0/24	256	IBM-ENDICOTT-NET	unknown	—	—	—
└ 204.146.135.0/24	256	IBM-CSMI-NET	unknown	—	—	—
└ 204.146.136.0/24	256	I-NET-136	unknown	—	—	—
└ 204.146.137.0/24	256	LENAPE-NET	unknown	—	—	—
└ 204.146.138.0/24	256	NRECA-NET	unknown	—	—	—
└ 204.146.139.0/24	256	NH-NET	unknown	—	—	—
└ 204.146.140.0/24	256	NASD-NET	unknown	—	—	—
└ 204.146.141.0/24	256	NIIP-NET	unknown	—	—	—
└ 204.146.143.0 - 204.146.144.255	512	COCA-COLA-NET	unknown	—	—	—
└ 204.146.145.0/24	256	DHT-NET	unknown	—	—	—
└ 204.146.147.0/24	256	COGGINS-NET	unknown	—	—	—
└ 204.146.148.0/24	256	ADV-TAMPA-HELPNET	unknown	—	—	—
└ 204.146.149.0/24	256	TEEPAK-NET	unknown	—	—	—
└ 204.146.150.0/24	256	DATAMATIX-NET	unknown	—	—	—
└ 204.146.151.0/24	256	SHOW3-NET	unknown	—	—	—
└ 204.146.152.0/24	256	SANTAFE-NET-152	unknown	—	—	—
└ 204.146.153.0/24	256	ADVANTIS-VISA-NET	unknown	—	—	—
└ 204.146.154.0/24	256	TB-NET	unknown	—	—	—
└ 204.146.158.0/24	256	UARCONET	unknown	—	—	—
└ 204.146.159.0/24	256	ATT-NET-204-146-159-0	unknown	—	—	—
└ 204.146.172.128/26	64	ATT-ACE-NET-204-146-172-128	unknown	—	—	—
└ 204.146.187.0 - 204.146.188.255	512	MOTOROLA-NET	unknown	—	—	—
└ 204.146.203.160/27	32	ARGIX-203-160	unknown	—	—	—
└ 204.146.240.0/20	4,096	LIG-TRN	unknown	—	—	—

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

65,536 addresses

Type	Addresses	Share	Ranges
Residential	65,504	>99%	2
Business	32	0.05%	1

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Origin network

AS7018

Name: AT&T Enterprises, LLC
Type: Internet provider
Registered: Jul 30, 1996
Domain: att.com
Website: www.att.com
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
204.146.0.0/16	AS7018	/16	ARIN	RPKI valid

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS7018	ARIN	AT&T Enterprises, LLC	MNT-AEL-360	Jun 29, 2026

204.146.0.0/16

Registrations in this block

Composition

Address share

Types across the prefix

Network & registry

AS7018

Who has announced this prefix

Routing history

Route origin authorizations

Route objects on the exact prefix

Registration for this announcement

Abuse contact