166.203.64.0/20

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

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
20.71.41.196	AS8075 Microsoft Corporation	`0.26ms` from Amsterdam, NL
20.54.214.20	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
23.36.10.244	AS16625 Akamai Technologies, Inc.	`0.48ms` from Atlanta, US
217.14.96.116	AS15815 INTRA Network Systems Ltd	`1.62ms` from Baku, AZ
173.76.230.84	AS701 Verizon Business	`1.36ms` from Boston, US
41.142.180.20	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`6.54ms` from Casablanca, MA
24.78.207.84	AS6327 Shaw Communications	`18.97ms` from Chicago, US
169.46.15.68	AS36351 IBM Cloud	`0.90ms` from Dallas, US
87.36.121.4	AS1213 HEAnet CLG	`2.38ms` from Dublin, IE
14.178.6.100	AS45899 VNPT Corp	`1.71ms` from Hanoi, VN
51.140.97.180	AS8075 Microsoft Corporation	`0.22ms` from London, GB
172.79.76.116	AS5650 Frontier Communications of America, Inc.	`15.03ms` from Los Angeles, US
45.230.78.100	AS267159 LTNET Telecomunicacoes EIRELE ME	`13.23ms` from Osasco, BR
20.3.66.244	AS8075 Microsoft Corporation	`0.25ms` from Quincy, US
179.212.128.4	AS28573 Claro NXT Telecomunicacoes Ltda	`2.78ms` from Sao Paulo, BR
119.69.67.228	AS17858 LG POWERCOMM	`1.88ms` from Seoul, KR
180.169.14.20	AS4812 China Telecom (Group)	`3.16ms` from Shanghai, CN
20.167.75.36	AS8075 Microsoft Corporation	`0.70ms` from Sydney, AU
133.9.111.100	AS17956 WASEDA University	`2.29ms` from Tokyo, JP
41.103.125.4	AS36947 Telecom Algeria	`11.27ms` from Valencia, ES
109.92.86.196	AS8400 TELEKOM SRBIJA a.d.	`3.03ms` from Belgrade, RS
141.14.129.84	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`1.04ms` from Berlin, DE
135.18.172.228	AS8075 Microsoft Corporation	`0.22ms` from Boydton, US
64.4.94.36	AS7122 Bell Canada	`15.71ms` from Chicago, US
134.147.106.196	AS29484 Ruhr-Universitaet Bochum	`3.32ms` from Duesseldorf, DE

Traceroute

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

traceroute -a -n -q1 -f7 -m15 166.203.70.12

traceroute to 166.203.70.12 (166.203.70.12): 15 hops max, 52 byte packets

7 [AS7018] 192.205.37.41 74.414 ms

8 [AS7018] 32.130.91.82 79.08 ms

9 *

10 *

11 *

12 [AS20057] 166.147.125.37 83.813 ms

13 *

14 *

15 *

Measurement taken from

IPinfo ProbeNet in Piscataway, 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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