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:        [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

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

IP Address	ASN	Details
166.203.128.33	AS20057 AT&T Enterprises, LLC	`6.08ms` from Dallas, US
166.203.129.35	AS20057 AT&T Enterprises, LLC	`6.23ms` from Dallas, 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
92.68.172.100	AS1136 KPN B.V.	`0.56ms` from Amsterdam, NL
201.244.247.20	AS19429 ETB - Colombia	`0.67ms` from Bogota, CO
174.110.234.4	AS11426 Charter Communications Inc	`16.21ms` from Charlotte, US
87.137.71.52	AS3320 Deutsche Telekom AG	`1.31ms` from Duesseldorf, DE
178.174.182.148	AS8473 Bahnhof AB	`8.33ms` from Falkenberg, SE
46.105.43.228	AS16276 OVH SAS	`0.06ms` from Gravelines, FR
116.5.77.4	AS4134 CHINANET-BACKBONE	`4.59ms` from Guangzhou, CN
185.81.238.148	AS201178 Euronet Telekomunikasyon A.S.	`1.28ms` from Istanbul, TR
79.152.11.100	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.21ms` from Madrid, ES
95.247.123.52	AS3269 Telecom Italia S.p.A.	`5.74ms` from Milan, IT
121.84.219.228	AS17511 OPTAGE Inc.	`1.97ms` from Osaka, JP
48.192.59.68	AS8075 Microsoft Corporation	`0.26ms` from Quincy, US
121.166.204.116	AS4766 Korea Telecom	`1.51ms` from Seoul, KR
220.143.20.164	AS3462 Data Communication Business Group	`6.34ms` from Taichung, TW
20.101.3.228	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
111.198.67.196	AS4808 China Unicom Beijing Province Network	`4.28ms` from Beijing, CN
144.121.21.116	AS46887 Crown Castle Fiber LLC	`0.45ms` from Boston, US
20.12.53.132	AS8075 Microsoft Corporation	`0.29ms` from Boydton, US
172.111.112.132	AS54113 Fastly, Inc.	`0.48ms` from Chennai, IN
104.130.94.244	AS19994 Rackspace Hosting	`1.31ms` from Chicago, US
89.42.77.4	AS8926 Moldtelecom SA	`0.95ms` from Chisinau, MD
70.118.140.244	AS11427 Charter Communications Inc	`8.31ms` from Dallas, US
97.121.135.84	AS209 CenturyLink Communications, LLC	`2.61ms` from Denver, US
59.58.186.4	AS4134 CHINANET-BACKBONE	`7.76ms` from Fuzhou, CN
139.159.239.20	AS55990 Huawei Cloud Service data center	`1.32ms` from Guangzhou, 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 -m16 166.203.135.193

traceroute to 166.203.135.193 (166.203.135.193): 16 hops max, 52 byte packets

5 [AS3549] 189.125.249.237 1.257 ms

6 [AS3356] 4.69.209.110 134.583 ms

7 [AS3356] 4.68.39.2 137.562 ms

8 [AS7018] 32.130.24.46 139.696 ms

9 *

10 *

11 *

12 *

13 [AS20057] 166.147.126.36 139.304 ms

14 *

15 *

16 *

Measurement taken from

IPinfo ProbeNet in Sao Paulo, BR

On December 6th 2025

What are IP address ranges?

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