155.166.72.0/21

AS20057 · AT&T Enterprises, LLC

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Summary

Country	United States
Domain	att.com
ASN	AS20057
Parent Range	155.166.0.0/16
Registry	ARIN
ID	ATT-MOBILITY-LLC-155-166-0-0

WHOIS Details

NetHandle:      NET-155-166-0-0-1
OrgID:          AEL-360
Parent:         NET-155-0-0-0-0
NetName:        ATT-MOBILITY-LLC-155-166-0-0
NetRange:       155.166.0.0 - 155.166.255.255
NetType:        allocation
RegDate:        1992-03-24
Updated:        2025-03-18
Source:         ARIN


OrgID:          AEL-360
OrgName:        AT&T Enterprises, LLC
CanAllocate:    
Street:         208 S. Akard St.
City:           Dallas
State/Prov:     TX
Country:        US
PostalCode:     75202
RegDate:        2024-11-22
Updated:        2025-10-29
OrgAdminHandle: ZS44-ARIN
OrgTechHandle:  ICC-ARIN
OrgTechHandle:  ZS44-ARIN
OrgAbuseHandle: ABUSE7-ARIN
OrgRoutingHandle:   ROUTI59-ARIN
Source:         ARIN


POCHandle:      ABUSE7-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         2701 W 15th ST
City:           Plano
State/Prov:     TX
Country:        US
PostalCode:     75075
RegDate:        2002-08-24
Updated:        2025-08-18
OfficePhone:    +1-919-319-8167
Mailbox:        abuse@att.net
Source:         ARIN


POCHandle:      ICC-ARIN
IsRole:         Y
LastName:       IP Team
FirstName:      
Street:         200 S. Laurel AVE
City:           MIDDLETOWN
State/Prov:     NJ
Country:        US
PostalCode:     07748
RegDate:        2002-09-24
Updated:        2025-08-18
OfficePhone:    +1-888-876-2382
Mailbox:        rm-ipspecialist@att.com
Source:         ARIN


POCHandle:      ZS44-ARIN
IsRole:         Y
LastName:       IPAdmin-ATT Internet Services
FirstName:      
Street:         7277 164th Ave NE
Street:         Attn: IP Management
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2000-05-17
Updated:        2025-08-18
OfficePhone:    +1-888-510-5545
Mailbox:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 155.166.72.0/21

Range	ASN	Company	Num of IPs
155.166.0.0/16	AS20057	AT&T Enterprises, LLC	65,536

Nearby Ranges

BGP prefixes that overlap with 155.166.0.0/16

Range	ASN	Company	Num of IPs
155.166.0.0/16	AS20057	AT&T Enterprises, LLC	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

23 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
155.166.74.7	AS20057 AT&T Enterprises, LLC	`22.60ms` from Atlanta, US
155.166.73.161	AS20057 AT&T Enterprises, LLC	`22.83ms` from Atlanta, US
155.166.72.2	AS20057 AT&T Enterprises, LLC	`30.85ms` from Atlanta, US

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
98.62.99.165	AS7922 Comcast Cable Communications, LLC	`4.97ms` from Atlanta, US
202.56.32.69	AS55850 Mercury NZ Limited	`0.49ms` from Auckland, NZ
65.25.33.21	AS10796 Charter Communications Inc	`5.86ms` from Cleveland, US
13.94.45.197	AS8075 Microsoft Corporation	`0.30ms` from Hong Kong, HK
50.228.128.133	AS7922 Comcast Cable Communications, LLC	`0.59ms` from Los Angeles, US
76.110.189.149	AS7922 Comcast Cable Communications, LLC	`6.34ms` from Miami, US
35.237.5.37	AS396982 Google LLC	`0.15ms` from Moncks Corner, US
188.191.163.197	AS50577 Intelsc Ltd.	`0.82ms` from Moscow, RU
132.236.183.53	AS26 Cornell University	`7.21ms` from New York City, US
80.12.8.149	AS3215 Orange S.A.	`1.13ms` from Paris, FR
201.201.245.37	AS11830 Instituto Costarricense de Electricidad y Telecom.	`2.94ms` from San Jose, CR
98.146.197.53	AS10838 Charter Communications Inc	`18.78ms` from Seattle, US
59.2.152.181	AS4766 Korea Telecom	`5.12ms` from Seoul, KR
101.126.76.101	AS137718 Beijing Volcano Engine Technology Co., Ltd.	`5.58ms` from Tianjin, CN
84.84.252.229	AS1136 KPN B.V.	`1.09ms` from Amsterdam, NL
16.144.51.213	AS16509 Amazon.com, Inc.	`0.21ms` from Boardman, US
73.61.83.197	AS7922 Comcast Cable Communications, LLC	`4.74ms` from Boston, US
102.46.254.197	AS8452 TE-AS	`5.39ms` from Cairo, EG
76.107.137.69	AS7922 Comcast Cable Communications, LLC	`16.78ms` from Dallas, US
217.72.200.245	AS8560 IONOS SE	`0.47ms` from Frankfurt am Main, DE
82.213.254.5	AS15704 XTRA TELECOM S.A.	`1.35ms` from Madrid, ES
179.26.235.149	AS6057 Administracion Nacional de Telecomunicaciones	`1.69ms` from Montevideo, UY
193.212.193.181	AS2119 Telenor Norge AS	`0.92ms` from Oslo, NO
98.163.181.37	AS22773 Cox Communications Inc.	`0.77ms` from Phoenix, US
121.180.180.213	AS4766 Korea Telecom	`6.25ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f3 155.166.72.2

traceroute to 155.166.72.2 (155.166.72.2): 64 hops max, 52 byte packets

3 [AS6453] 64.86.8.61 1.733 ms

4 [AS6453] 64.86.9.17 1.259 ms

5 [AS7018] 192.205.32.9 0.891 ms

6 [AS7018] 32.130.89.14 2.588 ms

7 *

8 *

9 *

10 [AS20057] 166.216.138.29 1.804 ms

11 [AS20057] 166.185.45.172 3.187 ms

12 *

13 *

14 [AS20057] 155.166.72.2 168.621 ms

Measurement taken from

IPinfo ProbeNet in Atlanta, US

On January 19th 2026

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