166.203.48.0/20

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

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

IP Address	ASN	Details
166.203.48.19	AS20057 AT&T Enterprises, LLC	`4.36ms` from Fremont, 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
82.173.134.228	AS13127 Odido Netherlands B.V.	`16.29ms` from Amsterdam, NL
34.33.23.52	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
34.244.186.228	AS16509 Amazon.com, Inc.	`0.40ms` from Dublin, IE
172.67.85.148	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
62.48.159.148	AS15525 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`1.17ms` from Lisbon, PT
134.213.186.244	AS15395 Rackspace Ltd.	`1.05ms` from London, GB
94.252.80.116	AS56665 Proximus Luxembourg S.A.	`1.21ms` from Luxembourg, LU
143.198.23.68	AS14061 DigitalOcean, LLC	`0.25ms` from New York City, US
180.48.231.228	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.77ms` from Osaka, JP
104.46.229.228	AS8075 Microsoft Corporation	`0.15ms` from Osaka, JP
179.231.208.244	AS26599 TELEFÔNICA BRASIL S.A	`18.65ms` from Osasco, BR
129.146.97.20	AS31898 Oracle Corporation	`0.17ms` from Phoenix, US
47.116.10.84	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`3.90ms` from Shanghai, CN
8.214.84.36	AS45102 Alibaba (US) Technology Co., Ltd.	`0.86ms` from Singapore, SG
23.248.176.20	AS21859 Zenlayer Inc	`0.04ms` from Taipei, TW
115.130.17.100	AS7545 TPG Telecom Limited	`1.83ms` from Brisbane, AU
136.143.199.4	AS46299 City of Littleton	`1.48ms` from Denver, US
89.27.243.68	AS8881 1&1 Versatel GmbH	`0.34ms` from Duesseldorf, DE
117.161.150.4	AS9808 China Mobile Communications Group Co., Ltd.	`1.54ms` from Hohhot, CN
47.83.177.20	AS45102 Alibaba (US) Technology Co., Ltd.	`0.71ms` from Hong Kong, HK
118.104.104.116	AS18126 Chubu Telecommunications Company, Inc.	`5.87ms` from Osaka, JP
13.38.155.116	AS16509 Amazon.com, Inc.	`0.12ms` from Paris, FR
63.216.14.4	AS3491 PCCW Global, Inc.	`0.43ms` from Seattle, US
124.55.213.180	AS17858 LG POWERCOMM	`1.81ms` from Seoul, KR
211.220.130.196	AS4766 Korea Telecom	`6.50ms` 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 -f4 -m13 166.203.54.29

traceroute to 166.203.54.29 (166.203.54.29): 13 hops max, 52 byte packets

4 [AS2497] 58.138.88.238 107.498 ms

5 *

6 [AS7018] 32.130.91.82 112.244 ms

7 *

8 *

9 *

10 [AS20057] 166.147.125.37 113.884 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Nagano, JP

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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