155.166.24.0/23

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:         208 S. Akard St.
City:           Dallas
State/Prov:     TX
Country:        US
PostalCode:     75202
RegDate:        2000-05-17
Updated:        2026-02-04
OfficePhone:    +1-888-510-5545
Mailbox:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 155.166.24.0/23

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

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

IP Address	ASN	Details
155.166.25.13	AS20057 AT&T Enterprises, LLC	`48.55ms` from Chicago, US
155.166.24.43	AS20057 AT&T Enterprises, LLC	`3.19ms` from Santa Clara, 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
44.244.255.55	AS16509 Amazon.com, Inc.	`0.48ms` from Boardman, US
104.36.93.55	AS13807 Great Plains Communications LLC	`5.70ms` from Columbus, US
116.99.150.103	AS7552 Viettel Group	`6.17ms` from Hanoi, VN
95.145.99.39	AS2856 British Telecommunications PLC	`6.07ms` from London, GB
115.84.229.135	AS9658 Eastern Telecoms Phils., Inc.	`0.37ms` from Manila, PH
201.185.230.167	AS13489 UNE EPM TELECOMUNICACIONES S.A.	`10.25ms` from Medellin, CO
151.42.240.55	AS1267 WIND TRE S.P.A.	`9.45ms` from Milan, IT
46.242.46.199	AS42610 PJSC Rostelecom	`1.18ms` from Moscow, RU
171.60.146.151	AS24560 Bharti Airtel Ltd., Telemedia Services	`17.00ms` from Mumbai, IN
106.111.94.167	AS4134 CHINANET-BACKBONE	`4.34ms` from Nanjing, CN
92.175.238.23	AS3215 Orange S.A.	`3.80ms` from Paris, FR
112.240.65.151	AS4837 CHINA UNICOM China169 Backbone	`4.70ms` from Qingdao, CN
75.142.141.215	AS20115 Charter Communications LLC	`19.31ms` from San Jose, US
108.85.248.247	AS7018 AT&T Enterprises, LLC	`19.99ms` from San Jose, US
186.207.21.119	AS28573 Claro NXT Telecomunicacoes Ltda	`6.02ms` from Sao Paulo, BR
187.101.19.231	AS27699 TELEFÔNICA BRASIL S.A	`1.74ms` from São Paulo, BR
155.199.208.231	AS40923 FMR LLC	`9.65ms` from Ashburn, US
101.108.66.23	AS23969 TOT Public Company Limited	`1.18ms` from Bangkok, TH
216.107.49.71	AS54103 MOD Mission Critical, LLC	`7.70ms` from Chicago, US
198.98.243.119	AS14374 Agri-Valley Services Corporation	`6.99ms` from Flint, US
118.222.207.151	AS9318 SK Broadband Co Ltd	`6.61ms` from Incheon, KR
84.126.156.7	AS6739 VODAFONE ONO, S.A.	`4.35ms` from Madrid, ES
176.213.173.151	AS52207 JSC ER-Telecom Holding	`3.67ms` from Moscow, RU
65.1.230.167	AS16509 Amazon.com, Inc.	`0.10ms` from Mumbai, IN
85.165.143.215	AS2119 Telenor Norge AS	`4.16ms` from Oslo, NO

Traceroute

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

traceroute -a -n -q1 -f5 -m13 155.166.25.219

traceroute to 155.166.25.219 (155.166.25.219): 13 hops max, 52 byte packets

5 [AS7018] 192.205.37.41 139.309 ms

6 [AS7018] 32.130.91.82 137.911 ms

7 *

8 *

9 *

10 [AS20057] 166.147.125.37 139.081 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Coventry, GB

On February 16th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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