166.203.128.0/20

AS20057 · AT&T Enterprises, LLC

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Summary

Country	United States
Domain	att.com
ASN	AS20057
Registry	ARIN
ID	AEL-360

WHOIS Details

NetHandle:      NET-166-183-0-0-1
OrgID:          AEL-360
Parent:         NET-166-0-0-0-0
NetName:        AEL-360
NetRange:       166.183.0.0 - 166.209.255.255
NetType:        allocation
RegDate:        2025-04-01
Updated:        2025-04-01
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

Nearby Ranges

BGP prefixes that overlap with 166.203.0.0/16

No nearby ranges found.

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

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

IP Address	ASN	Details
166.203.129.53	AS20057 AT&T Enterprises, LLC	`24.03ms` from Greenwood Village, US
166.203.128.208	AS20057 AT&T Enterprises, LLC	`11.46ms` from Houston, 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
44.243.123.212	AS16509 Amazon.com, Inc.	`0.10ms` from Boardman, US
194.102.194.212	AS31017 GMB Computers SRL	`3.33ms` from Bucharest, RO
85.99.246.52	AS9121 Turk Telekomunikasyon Anonim Sirketi	`1.43ms` from Bursa, TR
152.44.93.228	AS26087 Gardner-Webb University	`4.07ms` from Charlotte, US
218.195.46.68	AS4538 China Education and Research Network Center	`16.48ms` from Chengdu, CN
173.190.211.228	AS7029 Windstream Communications LLC	`14.93ms` from Chicago, US
121.11.118.212	AS4134 CHINANET-BACKBONE	`1.90ms` from Guangzhou, CN
221.127.182.52	AS9304 HGC Global Communications Limited	`1.13ms` from Hong Kong, HK
173.197.99.148	AS20001 Charter Communications Inc	`2.36ms` from Honolulu, US
167.232.254.4	AS11245 The Goodyear Tire & Rubber Company	`3.63ms` from Pittsburgh, US
104.19.151.148	AS13335 Cloudflare, Inc.	`0.12ms` from Porto Alegre, BR
18.205.155.4	AS14618 Amazon.com, Inc.	`0.42ms` from Reston, US
115.3.187.132	AS4766 Korea Telecom	`2.85ms` from Seoul, KR
175.246.194.132	AS4766 Korea Telecom	`3.19ms` from Seoul, KR
211.128.51.212	AS2527 Sony Network Communications Inc.	`7.06ms` from Tokyo, JP
220.99.151.212	AS4713 NTT DOCOMO BUSINESS,Inc.	`16.74ms` from Tokyo, JP
216.230.127.4	AS17054 Expedient	`2.90ms` from Ashburn, US
144.202.27.164	AS20473 The Constant Company, LLC	`0.17ms` from Atlanta, US
52.209.86.180	AS16509 Amazon.com, Inc.	`0.15ms` from Dublin, IE
68.40.243.116	AS7922 Comcast Cable Communications, LLC	`8.14ms` from Flint, US
90.33.126.68	AS3215 Orange S.A.	`18.66ms` from Frankfurt am Main, DE
142.247.87.116	AS25019 Saudi Telecom Company JSC	`6.04ms` from Jeddah, SA
42.178.23.84	AS4837 CHINA UNICOM China169 Backbone	`12.13ms` from Liaoyang, CN
119.117.109.132	AS4837 CHINA UNICOM China169 Backbone	`9.61ms` from Liaoyang, CN
89.241.31.116	AS13285 TalkTalk Communications Limited	`6.23ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f3 -m13 166.203.136.210

traceroute to 166.203.136.210 (166.203.136.210): 13 hops max, 52 byte packets

3 [AS3356] 4.69.209.114 104.948 ms

4 *

5 [AS7018] 32.130.24.46 118.701 ms

6 *

7 *

8 *

9 *

10 [AS20057] 166.147.126.36 117.078 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Coventry, GB

On November 14th 2025

What are IP address ranges?

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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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