166.203.128.0/17

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:      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


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

Nearby Ranges

BGP prefixes that overlap with 166.203.0.0/16

No nearby ranges found.

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
166.203.177.190 rpfesler.com 1
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

Pingable IPs

3,160 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.203.225.104 AS20057 AT&T Enterprises, LLC 85.17ms from San Jose, US
166.203.205.221 AS20057 AT&T Enterprises, LLC 11.42ms from Houston, US
166.203.233.18 AS20057 AT&T Enterprises, LLC 83.67ms from San Jose, US
166.203.198.97 AS20057 AT&T Enterprises, LLC 19.08ms from Houston, US
166.203.204.55 AS20057 AT&T Enterprises, LLC 11.39ms from Houston, US
166.203.250.184 AS20057 AT&T Enterprises, LLC 11.37ms from Houston, US
166.203.202.162 AS20057 AT&T Enterprises, LLC 19.13ms from Houston, US
166.203.201.26 AS20057 AT&T Enterprises, LLC 19.57ms from Houston, US
166.203.206.67 AS20057 AT&T Enterprises, LLC 34.23ms from Houston, US
166.203.232.2 AS20057 AT&T Enterprises, LLC 55.82ms from San Jose, US
166.203.207.219 AS20057 AT&T Enterprises, LLC 6.34ms from Santa Clara, US
166.203.230.199 AS20057 AT&T Enterprises, LLC 34.65ms from San Jose, US
166.203.227.118 AS20057 AT&T Enterprises, LLC 77.46ms from Santa Clara, US
166.203.229.148 AS20057 AT&T Enterprises, LLC 85.16ms from Santa Clara, US
166.203.228.185 AS20057 AT&T Enterprises, LLC 60.73ms from San Jose, US
166.203.199.18 AS20057 AT&T Enterprises, LLC 18.14ms from Houston, US
166.203.231.127 AS20057 AT&T Enterprises, LLC 39.31ms from Santa Clara, US
166.203.255.32 AS20057 AT&T Enterprises, LLC 24.23ms from Houston, US
166.203.224.188 AS20057 AT&T Enterprises, LLC 52.46ms from San Jose, US
166.203.226.161 AS20057 AT&T Enterprises, LLC 45.09ms from San Jose, US
166.203.129.35 AS20057 AT&T Enterprises, LLC 11.47ms from Houston, US
166.203.170.76 AS20057 AT&T Enterprises, LLC 11.34ms from Houston, US
166.203.173.96 AS20057 AT&T Enterprises, LLC 11.31ms from Houston, US
166.203.174.39 AS20057 AT&T Enterprises, LLC 11.47ms from Houston, US
166.203.164.33 AS20057 AT&T Enterprises, LLC 11.30ms 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
217.62.99.1 AS33915 Vodafone Libertel B.V. 5.20ms from Amsterdam, NL
184.185.49.1 AS22773 Cox Communications Inc. 3.34ms from Atlanta, US
12.108.78.1 AS7018 AT&T Enterprises, LLC 14.14ms from Atlanta, US
202.88.233.1 AS17465 Cable ISP in India 16.17ms from Bengaluru, IN
111.93.150.225 AS45820 Tata Teleservices ISP AS 1.44ms from Bengaluru, IN
178.0.0.1 AS3209 Vodafone GmbH 1.41ms from Berlin, DE
141.57.240.1 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 6.57ms from Berlin, DE
49.191.248.1 AS4804 Microplex PTY LTD 1.32ms from Brisbane, AU
186.127.75.1 AS7303 Telecom Argentina S.A. 0.94ms from Buenos Aires, AR
201.213.19.1 AS7303 Telecom Argentina S.A. 1.50ms from Buenos Aires, AR
86.41.66.1 AS5466 Eircom Limited 2.68ms from Dublin, IE
2.56.234.97 AS43140 Teleflash GmbH 0.55ms from Duesseldorf, DE
12.43.77.97 AS7018 AT&T Enterprises, LLC 1.32ms from Durham, US
213.221.93.177 AS8426 ClaraNET LTD 0.52ms from Frankfurt am Main, DE
222.78.2.177 AS4134 CHINANET-BACKBONE 7.33ms from Fuzhou, CN
193.13.38.65 AS1257 Tele2 Sverige AB 0.57ms from Goeteborg, SE
58.252.237.177 AS17816 China Unicom IP network China169 Guangdong province 4.97ms from Guangzhou, CN
115.224.174.1 AS4134 CHINANET-BACKBONE 6.68ms from Hangzhou, CN
193.211.14.81 AS1759 Telia Finland Oyj 0.99ms from Helsinki, FI
88.227.128.1 AS47331 TTNet A.S. 7.45ms from Istanbul, TR
102.205.131.1 AS329570 CCD Couriers (Pty) Ltd 0.15ms from Johannesburg, ZA
175.144.212.193 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 2.33ms from Kuala Lumpur, MY
190.187.71.1 AS21575 ENTEL PERU S.A. 0.79ms from Lima, PE
95.93.172.49 AS2860 NOS COMUNICACOES, S.A. 5.68ms from Lisbon, PT
62.172.97.33 AS2856 British Telecommunications PLC 0.89ms from London, GB

Traceroute

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

$
traceroute -a -n -q1 -f3 -m13 166.203.134.30
traceroute to 166.203.134.30 (166.203.134.30): 13 hops max, 52 byte packets
3 [AS3356] 4.69.209.114 112.186 ms
4 [AS3356] 4.68.39.2 117.987 ms
5 [AS7018] 32.130.24.46 117.81 ms
6 *
7 *
8 *
9 *
10 [AS20057] 166.147.126.37 119.173 ms
11 *
12 *
13 *
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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