204.178.0.0/21

AS6431 · AT&T Enterprises, LLC

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Summary

Country	United States
Domain	att.com
ASN	AS6431
Parent Range	204.176.0.0/14
Registry	ARIN
ID	UU-204-178-0-0

WHOIS Details

NetHandle:      NET-204-178-0-0-1
OrgID:          ATTLAB
Parent:         NET-204-176-0-0-1
NetName:        UU-204-178-0-0
NetRange:       204.178.0.0 - 204.178.15.255
NetType:        reassignment
RegDate:        1997-05-01
Updated:        2010-07-13
Source:         ARIN


OrgID:          ATTLAB
OrgName:        AT&T Laboratories
CanAllocate:    
Street:         200 S. Laurel Ave
Street:         D5-2B05
City:           Middletown
State/Prov:     NJ
Country:        US
PostalCode:     07748
RegDate:        1989-04-28
Updated:        2023-03-07
OrgAdminHandle: SYG-ARIN
OrgTechHandle:  SYG-ARIN
OrgAbuseHandle: SYG-ARIN
Source:         ARIN


POCHandle:      SYG-ARIN
IsRole:         N
LastName:       Gao
FirstName:      Steven
Street:         200 S. Laurel Avenue
City:           Middletown
State/Prov:     NJ
Country:        US
PostalCode:     07748
RegDate:        2008-07-15
Updated:        2024-08-27
OfficePhone:    +1-984-332-9149
MobilePhone:    +1-973-610-4452
Mailbox:        sg2468@att.com
Mailbox:        sgao777@outlook.com
Mailbox:        steveng@research.att.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 204.178.0.0/21

Range	ASN	Company	Num of IPs
204.176.0.0/14	AS13666	Verizon Business	262,144
204.176.0.0/14	AS15297	Verizon Business	262,144
204.176.0.0/14	AS32806	Verizon Business	262,144
204.176.0.0/14	AS701	Verizon Business	262,144

Nearby Ranges

BGP prefixes that overlap with 204.178.0.0/16

Range	ASN	Company	Num of IPs
204.176.0.0/14	AS13666	Verizon Business	262,144
204.176.0.0/14	AS15297	Verizon Business	262,144
204.176.0.0/14	AS32806	Verizon Business	262,144
204.176.0.0/14	AS701	Verizon Business	262,144
204.178.128.0/20	AS7118	Echo Communications Group, Inc.	4,096

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
206.203.67.37	AS10599 McKesson Corp.	`0.41ms` from Ashburn, US
35.166.140.117	AS16509 Amazon.com, Inc.	`0.12ms` from Boardman, US
134.255.73.181	AS5483 Magyar Telekom Plc.	`0.84ms` from Budapest, HU
105.196.96.181	AS24835 Vodafone Data	`4.40ms` from Cairo, EG
113.206.201.213	AS4837 CHINA UNICOM China169 Backbone	`1.71ms` from Chongqing, CN
176.70.77.245	AS1257 Tele2 Sverige AB	`0.59ms` from Goeteborg, SE
84.90.90.69	AS13156 NOWO COMMUNICATIONS, S.A.	`7.65ms` from Lisbon, PT
151.74.149.69	AS1267 WIND TRE S.P.A.	`18.07ms` from Milan, IT
180.140.170.53	AS4134 CHINANET-BACKBONE	`1.91ms` from Nanning, CN
121.82.235.245	AS17511 OPTAGE Inc.	`2.60ms` from Osaka, JP
60.122.113.213	AS17676 SoftBank Corp.	`3.75ms` from Osaka, JP
213.41.169.245	AS13193 KEYYO SA	`1.81ms` from Paris, FR
212.81.36.69	AS49505 JSC Selectel	`1.02ms` from Saint Petersburg, RU
50.115.78.85	AS14265 TPx Communications	`1.24ms` from San Jose, US
221.163.118.181	AS4766 Korea Telecom	`1.79ms` from Seoul, KR
202.8.178.5	AS9530 SHINSEGAE I C Co., Ltd.	`1.52ms` from Seoul, KR
148.81.43.101	AS1887 NAUKOWA I AKADEMICKA SIEC KOMPUTEROWA - PANSTWOWY INSTYTUT BADAWCZY	`1.31ms` from Warsaw, PL
123.243.135.117	AS7545 TPG Telecom Limited	`11.31ms` from Adelaide, AU
110.249.176.213	AS4837 CHINA UNICOM China169 Backbone	`6.96ms` from Beijing, CN
34.41.215.133	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
199.200.94.245	AS15164 Unite Private Networks LLC.	`0.32ms` from Dallas, US
203.94.243.53	AS17813 Mahanagar Telephone Nigam Limited	`7.13ms` from Delhi, IN
185.146.251.21	AS203043 Tirastel GmbH	`0.46ms` from Frankfurt am Main, DE
84.145.229.5	AS3320 Deutsche Telekom AG	`11.75ms` from Frankfurt am Main, DE
97.115.81.165	AS209 CenturyLink Communications, LLC	`1.47ms` from Hillsboro, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f3 -m7 204.178.5.2

traceroute to 204.178.5.2 (204.178.5.2): 7 hops max, 52 byte packets

3 [AS3356] 4.69.209.78 103.103 ms

4 [AS7018] 192.205.37.141 101.191 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Budapest, HU

On September 18th 2025

What are IP address ranges?

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