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:      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


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

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

37 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	`6.38ms` from Santa Clara, 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
75.91.230.116	AS7029 Windstream Communications LLC	`7.92ms` from Atlanta, US
92.119.122.84	AS62214 Rackforest Zrt.	`0.12ms` from Budapest, HU
172.238.176.196	AS63949 Akamai Connected Cloud	`0.31ms` from Chicago, US
63.34.82.148	AS16509 Amazon.com, Inc.	`0.29ms` from Dublin, IE
85.16.203.68	AS9145 EWE TEL GmbH	`4.17ms` from Hamburg, DE
123.23.152.164	AS45899 VNPT Corp	`5.75ms` from Ho Chi Minh City, VN
115.73.234.100	AS7552 Viettel Group	`0.87ms` from Ho Chi Minh City, VN
194.74.251.148	AS2856 British Telecommunications PLC	`1.17ms` from London, GB
85.121.120.36	AS9009 M247 Europe SRL	`0.47ms` from London, GB
184.150.61.212	AS577 Bell Canada	`0.91ms` from Montreal, CA
2.62.24.164	AS12389 PJSC Rostelecom	`8.87ms` from Novosibirsk, RU
158.46.114.4	AS39927 E-Light-Telecom Ltd.	`7.39ms` from Novosibirsk, RU
60.155.245.212	AS17676 SoftBank Corp.	`3.61ms` from Osaka, JP
84.99.77.52	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`2.66ms` from Paris, FR
72.85.15.20	AS701 Verizon Business	`4.35ms` from Philadelphia, US
181.221.56.84	AS28573 Claro NXT Telecomunicacoes Ltda	`14.51ms` from Rio de Janeiro, BR
37.101.108.196	AS1267 WIND TRE S.P.A.	`11.86ms` from Rome, IT
24.6.107.180	AS7922 Comcast Cable Communications, LLC	`5.72ms` from San Jose, US
42.192.109.84	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.31ms` from Shanghai, CN
58.161.172.116	AS1221 Telstra Limited	`19.50ms` from Sydney, AU
102.179.183.148	AS37577 Orange Burkina Faso	`18.92ms` from Accra, GH
23.1.9.164	AS16625 Akamai Technologies, Inc.	`0.18ms` from Ashburn, US
76.111.4.36	AS7922 Comcast Cable Communications, LLC	`10.57ms` from Ashburn, US
188.120.90.4	AS31027 GlobalConnect A/S	`0.64ms` from Copenhagen, DK
119.147.162.4	AS4134 CHINANET-BACKBONE	`2.85ms` from Guangzhou, CN

Traceroute

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

traceroute -a -n -q1 -f4 -m14 166.203.60.250

traceroute to 166.203.60.250 (166.203.60.250): 14 hops max, 52 byte packets

4 [AS3549] 201.234.89.33 1.917 ms

5 *

6 *

7 [AS7018] 32.130.91.82 83.686 ms

8 *

9 *

10 *

11 [AS20057] 166.147.125.36 96.101 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Mexico City, MX

On January 30th 2026

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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