166.203.16.0/20

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:      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


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

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
5.251.78.196	AS9198 JSC Kazakhtelecom	`18.98ms` from Astana, KZ
34.61.49.196	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
207.200.19.4	AS11320 LightEdge Solutions	`4.93ms` from Dallas, US
76.84.165.100	AS11427 Charter Communications Inc	`19.04ms` from Dallas, US
24.253.242.36	AS22773 Cox Communications Inc.	`7.65ms` from Dallas, US
151.230.128.116	AS5607 Sky UK Limited	`4.85ms` from Erith, GB
88.195.200.52	AS1759 Telia Finland Oyj	`8.49ms` from Helsinki, FI
34.96.152.68	AS396982 Google LLC	`0.11ms` from Hong Kong, HK
79.169.195.212	AS2860 NOS COMUNICACOES, S.A.	`6.43ms` from Lisbon, PT
168.199.7.36	AS39855 Mod Mission Critical LLC	`0.29ms` from Marseille, FR
112.27.70.196	AS9808 China Mobile Communications Group Co., Ltd.	`7.55ms` from Nanjing, CN
119.31.138.132	AS138384 Rakuten Mobile Network, Inc.	`5.99ms` from Osaka, JP
34.13.228.100	AS396982 Google LLC	`0.15ms` from Oudeschip, NL
13.39.101.212	AS16509 Amazon.com, Inc.	`0.15ms` from Paris, FR
88.102.141.4	AS5610 O2 Czech Republic, a.s.	`2.81ms` from Prague, CZ
40.128.189.148	AS7029 Windstream Communications LLC	`8.25ms` from Secaucus, US
27.124.134.180	AS38109 SK Broadband Co Ltd	`11.46ms` from Seoul, KR
105.105.65.180	AS36947 Telecom Algeria	`12.31ms` from Tunis, TN
5.238.242.180	AS58224 Iran Telecommunication Company PJS	`17.92ms` from Yerevan, AM
98.62.21.4	AS7922 Comcast Cable Communications, LLC	`5.25ms` from Atlanta, US
125.33.4.68	AS4808 China Unicom Beijing Province Network	`3.44ms` from Beijing, CN
211.158.33.68	AS4837 CHINA UNICOM China169 Backbone	`2.46ms` from Chongqing, CN
168.228.239.100	AS52705 FRANET TELECOM	`5.09ms` from Curitiba, BR
206.124.11.4	AS6653 Vero Broadband	`0.20ms` from Denver, US
38.47.122.148	AS55933 Cloudie Limited	`1.43ms` from Hong Kong, HK

Traceroute

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

traceroute -a -n -q1 -f5 -m17 166.203.20.131

traceroute to 166.203.20.131 (166.203.20.131): 17 hops max, 52 byte packets

5 [AS3342] 212.237.251.46 63.413 ms

6 *

7 [AS3356] 4.69.209.114 118.14 ms

8 [AS3356] 4.68.39.2 138.387 ms

9 [AS7018] 32.130.24.46 123.01 ms

10 *

11 *

12 *

13 *

14 [AS20057] 166.147.126.36 124.2 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Skanderborg, DK

On December 14th 2025

What are IP address ranges?

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