166.203.240.0/21

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:        [email protected]
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:        [email protected]
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:        [email protected]
Mailbox:        [email protected]
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

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
111.204.50.5	AS4808 China Unicom Beijing Province Network	`4.41ms` from Beijing, CN
103.245.131.21	AS55982 Changhong IT information Products CO.,LTD.	`4.21ms` from Beijing, CN
52.38.68.117	AS16509 Amazon.com, Inc.	`0.21ms` from Boardman, US
78.20.193.149	AS6848 Telenet BV	`6.66ms` from Brussels, BE
181.79.194.21	AS52468 UFINET PANAMA S.A.	`0.90ms` from Curridabat, CR
52.211.155.117	AS16509 Amazon.com, Inc.	`0.16ms` from Dublin, IE
89.182.13.21	AS13045 htp GmbH	`6.36ms` from Frankfurt am Main, DE
79.206.205.165	AS3320 Deutsche Telekom AG	`1.97ms` from Frankfurt am Main, DE
122.227.141.5	AS4134 CHINANET-BACKBONE	`6.17ms` from Hangzhou, CN
154.23.134.229	AS18186 Nebula Global LLC	`0.93ms` from Hong Kong, HK
81.187.52.85	AS20712 Andrews & Arnold Ltd	`1.90ms` from London, GB
158.120.72.245	AS34119 Wildcard UK Limited	`3.91ms` from Manchester, GB
222.127.187.229	AS4775 Globe Telecoms	`0.60ms` from Manila, PH
83.201.201.5	AS3215 Orange S.A.	`15.26ms` from Marseille, FR
151.20.10.229	AS1267 WIND TRE S.P.A.	`1.82ms` from Milan, IT
99.84.170.197	AS16509 Amazon.com, Inc.	`0.09ms` from New York City, US
185.113.166.101	AS60845 Interhyp AG	`4.64ms` from Nuernberg, DE
135.149.211.85	AS8075 Microsoft Corporation	`0.17ms` from Osaka, JP
179.118.149.69	AS26599 TELEFÔNICA BRASIL S.A	`2.78ms` from Osasco, BR
88.188.224.5	AS12322 Free SAS	`6.91ms` from Paris, FR
123.234.195.213	AS4837 CHINA UNICOM China169 Backbone	`2.29ms` from Qingdao, CN
126.38.13.213	AS17676 SoftBank Corp.	`3.27ms` from Tokyo, JP
43.140.225.197	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.94ms` from Beijing, CN
50.217.3.245	AS7922 Comcast Cable Communications, LLC	`1.16ms` from Boston, US
187.65.249.149	AS28573 Claro NXT Telecomunicacoes Ltda	`14.12ms` from Curitiba, BR

Traceroute

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

traceroute -a -n -q1 -m13 166.203.241.244

traceroute to 166.203.241.244 (166.203.241.244): 13 hops max, 52 byte packets

1 [AS33182] 67.23.235.129 33.276 ms

2 *

3 *

4 *

5 [AS7018] 192.205.37.41 67.297 ms

6 [AS7018] 32.130.91.82 71.231 ms

7 *

8 *

9 *

10 [AS20057] 166.147.125.37 75.904 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Orlando, US

On November 28th 2025

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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