1. All IP Ranges
  2. 166.0.0.0/8
  3. 166.203.0.0/16
  4. AS20057  | 166.203.0.0/16

166.203.0.0/16

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 166.0.0.0/8

Range ASN Company Num of IPs
166.238.0.0/16 AS26611 COMUNICACIÓN CELULAR S.A. COMCEL S.A. 65,536
166.123.0.0/16 AS13506 United States Department of the Treasury 65,536
166.93.0.0/16 AS26914 Synoptek, LLC 65,536
166.56.0.0/16 AS3371 Verizon Business 65,536
166.84.0.0/16 AS2033 Panix 65,536
166.100.0.0/16 AS2687 AT&T Japan K.K. 65,536
166.82.0.0/16 AS7029 Windstream Communications LLC 65,536
166.104.0.0/16 AS9321 Hanyang University 65,536
166.99.0.0/16 AS11719 Eaton Corporation 65,536
166.56.0.0/16 AS3372 Verizon Business 65,536
166.211.0.0/16 AS22394 Verizon Business 65,536
166.58.0.0/16 AS3377 Verizon Business 65,536
166.90.0.0/16 AS3356 Level 3 Parent, LLC 65,536
166.91.0.0/16 AS33084 District of Columbia Public Schools 65,536
166.70.0.0/16 AS6315 XMission, L.C. 65,536
166.92.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.211.0.0/16 AS6167 Verizon Business 65,536
166.94.0.0/16 AS3926 Fairfax County Government 65,536
166.58.0.0/16 AS3372 Verizon Business 65,536
166.90.0.0/16 AS3257 Level 3 Parent, LLC 65,536
166.19.0.0/16 AS33425 CoreWeave, Inc 65,536
166.58.0.0/16 AS3371 Verizon Business 65,536
166.89.0.0/16 AS13918 City of Tucson 65,536
166.20.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
166.91.0.0/16 AS14072 District of Columbia Public Schools 65,536
166.122.0.0/16 AS6360 University of Hawaii 65,536
166.72.0.0/16 AS7018 AT&T Enterprises, LLC 65,536
166.102.0.0/16 AS7029 Windstream Communications LLC 65,536
166.111.0.0/16 AS4538 Tsinghua University 65,536
166.87.0.0/16 AS5080 Saudi Arabian Oil Company 65,536
166.117.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.69.0.0/16 AS19773 Motorola MNIC 65,536
166.74.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.80.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.49.128.0/17 AS5400 communications networking services Private Unlimited Company 32,768
166.48.0.0/17 AS396338 Altima Telecom 32,768
166.49.0.0/17 AS3561 CenturyLink Communications, LLC 32,768
166.114.128.0/17 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 32,768
166.62.128.0/17 AS5769 Videotron Ltee 32,768
166.113.64.0/18 AS53449 OEC Fiber 16,384
166.108.128.0/18 AS35077 Netwo SAS 16,384
166.114.64.0/18 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 16,384
166.114.32.0/19 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 8,192
166.113.32.0/19 AS13370 Ziply Fiber 8,192
166.63.128.0/19 AS3561 CenturyLink Communications, LLC 8,192
166.63.192.0/19 AS1273 Vodafone Americas 8,192
166.113.0.0/19 AS19870 Cherry Creek School District #5 8,192
166.108.0.0/19 AS16509 Amazon.com, Inc. 8,192
166.63.160.0/19 AS1273 Vodafone Americas 8,192
166.114.16.0/20 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 4,096

Hosted domains

There are 24 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.203.189.172 justicelegalshield.com 1

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

3,365 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.203.186.6 AS20057 AT&T Enterprises, LLC 6.08ms from Dallas, US
166.203.176.136 AS20057 AT&T Enterprises, LLC 6.22ms from Dallas, US
166.203.184.147 AS20057 AT&T Enterprises, LLC 7.22ms from Dallas, US
166.203.229.148 AS20057 AT&T Enterprises, LLC 83.47ms from San Jose, US
166.203.207.219 AS20057 AT&T Enterprises, LLC 4.50ms from Santa Clara, US
166.203.96.223 AS20057 AT&T Enterprises, LLC 6.12ms from Dallas, US
166.203.171.135 AS20057 AT&T Enterprises, LLC 6.04ms from Dallas, US
166.203.97.156 AS20057 AT&T Enterprises, LLC 6.03ms from Dallas, US
166.203.199.18 AS20057 AT&T Enterprises, LLC 16.78ms from Houston, US
166.203.101.41 AS20057 AT&T Enterprises, LLC 26.48ms from Kansas City, US
166.203.255.32 AS20057 AT&T Enterprises, LLC 26.31ms from Dallas, US
166.203.201.26 AS20057 AT&T Enterprises, LLC 20.19ms from Dallas, US
166.203.205.221 AS20057 AT&T Enterprises, LLC 7.20ms from Dallas, US
166.203.250.241 AS20057 AT&T Enterprises, LLC 6.04ms from Dallas, US
166.203.197.155 AS20057 AT&T Enterprises, LLC 16.00ms from Houston, US
166.203.187.74 AS20057 AT&T Enterprises, LLC 6.03ms from Dallas, US
166.203.230.199 AS20057 AT&T Enterprises, LLC 40.92ms from Redding, US
166.203.228.185 AS20057 AT&T Enterprises, LLC 62.58ms from San Jose, US
166.203.198.211 AS20057 AT&T Enterprises, LLC 19.42ms from Houston, US
166.203.233.18 AS20057 AT&T Enterprises, LLC 82.16ms from San Jose, US
166.203.226.161 AS20057 AT&T Enterprises, LLC 46.52ms from Santa Clara, US
166.203.166.4 AS20057 AT&T Enterprises, LLC 6.04ms from Dallas, US
166.203.163.44 AS20057 AT&T Enterprises, LLC 8.46ms from Dallas, US
166.203.181.212 AS20057 AT&T Enterprises, LLC 6.06ms from Dallas, US
166.203.227.72 AS20057 AT&T Enterprises, LLC 83.15ms from San Jose, 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
73.183.85.64 AS7922 Comcast Cable Communications, LLC 10.56ms from Ashburn, US
52.224.181.48 AS8075 Microsoft Corporation 0.45ms from Ashburn, US
60.234.247.64 AS140220 Sky Network Television Ltd 1.94ms from Auckland, NZ
190.173.245.192 AS22927 Telefonica de Argentina 9.98ms from Buenos Aires, AR
198.30.182.240 AS396381 Genesis Healthcare System 4.33ms from Columbus, US
107.130.194.224 AS7018 AT&T Enterprises, LLC 2.57ms from Dallas, US
200.166.154.80 AS4230 CLARO S.A. 11.87ms from Fortaleza, BR
111.36.239.224 AS24444 Shandong Mobile Communication Company Limited 1.94ms from Jinan, CN
86.3.134.192 AS5089 Virgin Media Limited 6.18ms from London, GB
151.29.84.16 AS1267 WIND TRE S.P.A. 7.72ms from Milan, IT
37.194.237.32 AS31200 Novotelecom Ltd 1.23ms from Novosibirsk, RU
90.25.54.16 AS3215 Orange S.A. 6.11ms from Paris, FR
27.202.150.176 AS4837 CHINA UNICOM China169 Backbone 6.05ms from Qingdao, CN
3.216.211.240 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
118.200.89.208 AS9506 Singtel Fibre Broadband 2.24ms from Singapore, SG
125.196.213.96 AS2518 BIGLOBE Inc. 2.84ms from Tokyo, JP
51.89.3.192 AS16276 OVH SAS 0.10ms from Frankfurt am Main, DE
116.63.179.32 AS58519 Cloud Computing Corporation 0.76ms from Guiyang, CN
94.62.195.224 AS12353 Vodafone Portugal 3.03ms from Lisbon, PT
5.70.148.192 AS5607 Sky UK Limited 12.35ms from London, GB
73.0.175.112 AS7922 Comcast Cable Communications, LLC 6.89ms from Miami, US
182.90.0.128 AS4837 CHINA UNICOM China169 Backbone 10.24ms from Nanning, CN
178.67.220.0 AS12389 PJSC Rostelecom 3.66ms from Saint Petersburg, RU
14.75.138.128 AS4766 Korea Telecom 10.12ms from Seoul, KR
61.80.111.208 AS4766 Korea Telecom 5.79ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f3 -m14 166.203.67.113
traceroute to 166.203.67.113 (166.203.67.113): 14 hops max, 52 byte packets
3 [AS12540] 212.64.163.62 25.142 ms
4 *
5 *
6 *
7 [AS7018] 32.130.91.82 182.636 ms
8 *
9 *
10 *
11 [AS20057] 166.147.125.37 188.421 ms
12 *
13 *
14 *
Measurement taken from IPinfo ProbeNet in Las Palmas de Gran Canaria, ES
On

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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