155.166.16.0/22

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 155.166.16.0/22

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

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
100.21.131.182	AS16509 Amazon.com, Inc.	`0.22ms` from Boardman, US
223.197.241.118	AS4760 HKT Limited	`1.52ms` from Hong Kong, HK
90.165.151.38	AS12479 Orange Espagne SA	`13.98ms` from Madrid, ES
49.151.125.54	AS9299 Philippine Long Distance Telephone Company	`5.70ms` from Manila, PH
90.29.123.102	AS3215 Orange S.A.	`10.84ms` from Paris, FR
20.17.12.70	AS8075 Microsoft Corporation	`1.55ms` from Singapore, SG
79.124.19.182	AS25374 ESCOM Ltd. - Haskovo	`3.44ms` from Sofia, BG
95.55.240.134	AS12389 PJSC Rostelecom	`9.28ms` from Stockholm, SE
217.212.203.102	AS3301 Telia Company AB	`0.86ms` from Stockholm, SE
221.193.110.230	AS4837 CHINA UNICOM China169 Backbone	`7.71ms` from Tianjin, CN
42.234.207.86	AS4837 CHINA UNICOM China169 Backbone	`4.99ms` from Zhengzhou, CN
92.98.137.102	AS5384 Emirates Internet	`2.92ms` from Al Fujairah City, AE
20.51.175.118	AS8075 Microsoft Corporation	`0.38ms` from Ashburn, US
62.28.231.38	AS15525 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`0.69ms` from Braga, PT
120.147.85.102	AS1221 Telstra Limited	`2.71ms` from Brisbane, AU
96.70.44.54	AS7922 Comcast Cable Communications, LLC	`5.96ms` from Chicago, US
141.39.188.86	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`8.80ms` from Frankfurt am Main, DE
93.219.70.182	AS3320 Deutsche Telekom AG	`1.71ms` from Hamburg, DE
121.142.9.22	AS4766 Korea Telecom	`1.30ms` from Incheon, KR
76.196.109.198	AS7018 AT&T Enterprises, LLC	`2.05ms` from Kansas City, US
60.49.106.214	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`7.35ms` from Kuala Lumpur, MY
5.133.75.6	AS14717 EZE Castle Integration Inc.	`1.69ms` from London, GB
200.135.82.22	AS10715 Universidade Federal de Santa Catarina	`11.19ms` from Osasco, BR
158.231.88.102	AS36351 IBM Cloud	`0.80ms` from Paris, FR
39.80.184.166	AS4837 CHINA UNICOM China169 Backbone	`9.36ms` from Qingdao, CN

Traceroute

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

traceroute -a -n -q1 -f5 -m15 155.166.19.75

traceroute to 155.166.19.75 (155.166.19.75): 15 hops max, 52 byte packets

5 [AS3356] 4.69.217.206 130.853 ms

6 *

7 [AS7018] 32.130.89.14 132.229 ms

8 *

9 *

10 *

11 [AS20057] 166.170.17.85 132.262 ms

12 [AS20057] 166.185.45.172 133.096 ms

13 *

14 *

15 *

Measurement taken from

IPinfo ProbeNet in Riga, LV

On January 18th 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.

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