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:        abuse@att.net
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:        rm-ipspecialist@att.com
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:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 166.0.0.0/8

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

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

3,518 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.203.189.169 AS20057 AT&T Enterprises, LLC 11.49ms from Houston, US
166.203.233.18 AS20057 AT&T Enterprises, LLC 85.05ms from San Jose, US
166.203.80.198 AS20057 AT&T Enterprises, LLC 2.09ms from Ashburn, US
166.203.197.228 AS20057 AT&T Enterprises, LLC 17.23ms from Houston, US
166.203.160.153 AS20057 AT&T Enterprises, LLC 21.08ms from Houston, US
166.203.199.18 AS20057 AT&T Enterprises, LLC 17.52ms from Houston, US
166.203.198.211 AS20057 AT&T Enterprises, LLC 18.43ms from Houston, US
166.203.175.40 AS20057 AT&T Enterprises, LLC 24.07ms from Greenwood Village, US
166.203.187.1 AS20057 AT&T Enterprises, LLC 11.71ms from Houston, US
166.203.176.251 AS20057 AT&T Enterprises, LLC 11.43ms from Houston, US
166.203.224.188 AS20057 AT&T Enterprises, LLC 53.56ms from San Jose, US
166.203.81.7 AS20057 AT&T Enterprises, LLC 2.86ms from Ashburn, US
166.203.97.167 AS20057 AT&T Enterprises, LLC 23.82ms from Houston, US
166.203.178.223 AS20057 AT&T Enterprises, LLC 11.54ms from Houston, US
166.203.173.76 AS20057 AT&T Enterprises, LLC 11.49ms from Houston, US
166.203.179.172 AS20057 AT&T Enterprises, LLC 11.45ms from Houston, US
166.203.165.22 AS20057 AT&T Enterprises, LLC 11.47ms from Houston, US
166.203.232.2 AS20057 AT&T Enterprises, LLC 60.11ms from San Jose, US
166.203.188.217 AS20057 AT&T Enterprises, LLC 11.42ms from Houston, US
166.203.172.31 AS20057 AT&T Enterprises, LLC 11.41ms from Houston, US
166.203.227.118 AS20057 AT&T Enterprises, LLC 78.82ms from San Jose, US
166.203.48.75 AS20057 AT&T Enterprises, LLC 3.79ms from Santa Clara, US
166.203.228.185 AS20057 AT&T Enterprises, LLC 61.05ms from Fremont, US
166.203.177.37 AS20057 AT&T Enterprises, LLC 11.42ms from Houston, US
166.203.169.47 AS20057 AT&T Enterprises, LLC 14.17ms from Houston, 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
68.0.238.64 AS22773 Cox Communications Inc. 7.66ms from Boston, US
87.89.82.192 AS5410 Bouygues Telecom SA 5.97ms from Frankfurt am Main, DE
156.254.116.144 AS401783 TOKALA COMMUNICATIONS INC. 1.89ms from Jakarta, ID
67.125.63.80 AS7018 AT&T Enterprises, LLC 2.19ms from Los Angeles, US
88.17.10.0 AS3352 TELEFONICA DE ESPANA S.A.U. 5.86ms from Madrid, ES
142.122.45.96 AS577 Bell Canada 1.87ms from Montreal, CA
34.236.233.192 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
67.5.158.80 AS209 CenturyLink Communications, LLC 8.53ms from Seattle, US
119.221.193.112 AS4766 Korea Telecom 5.97ms from Seoul, KR
180.156.153.16 AS4812 China Telecom (Group) 4.25ms from Shanghai, CN
20.51.19.160 AS8075 Microsoft Corporation 0.26ms from Boydton, US
59.178.119.64 AS9829 National Internet Backbone 7.40ms from Delhi, IN
101.70.99.0 AS4837 CHINA UNICOM China169 Backbone 5.20ms from Hangzhou, CN
14.168.2.96 AS45899 VNPT Corp 5.61ms from Ho Chi Minh City, VN
62.211.63.64 AS3269 Telecom Italia S.p.A. 2.64ms from Milan, IT
94.77.105.224 AS6761 Invest Development LLC 0.95ms from Moscow, RU
176.147.226.16 AS5410 Bouygues Telecom SA 1.90ms from Paris, FR
34.238.34.64 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
186.207.52.240 AS28573 Claro NXT Telecomunicacoes Ltda 8.00ms from Sao Paulo, BR
122.39.255.144 AS17858 LG POWERCOMM 2.13ms from Seoul, KR
110.175.191.224 AS7545 TPG Telecom Limited 1.02ms from Sydney, AU
41.102.121.176 AS36947 Telecom Algeria 12.24ms from Valencia, ES
85.2.145.128 AS3303 Swisscom (Switzerland) Ltd 1.55ms from Zuerich, CH
139.201.179.96 AS4134 CHINANET-BACKBONE 6.50ms from Chengdu, CN
119.5.137.224 AS4837 CHINA UNICOM China169 Backbone 6.38ms from Chengdu, 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 -m12 166.203.56.13
traceroute to 166.203.56.13 (166.203.56.13): 12 hops max, 52 byte packets
5 [AS7018] 32.130.91.82 152.4 ms
6 *
7 *
8 *
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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