: The best you could do is ping / nslookup it to get the IP; and lookup who the IP belongs to. Given superuser.com as an example: PING superuser.com (64.34.119.12): 56 data bytes 64

@Welton855

The best you could do is ping / nslookup it to get the IP; and lookup who the IP belongs to. Given superuser.com as an example:


PING superuser.com (64.34.119.12): 56 data bytes
64 bytes from 64.34.119.12: icmp_seq=0 ttl=52 time=50.067 ms


Then doing a WHOIS on the IP Address:

VCSJONESMBP:~ kjones$ whois "n 64.34.119.12"
#
# The following results may also be obtained via:
# whois.arin.net/rest/nets;q=64.34.119.12?showDetails=true&showARIN=false&ext=netref2 #

NetRange: 64.34.0.0 - 64.34.255.255
CIDR: 64.34.0.0/16
OriginAS:
NetName: PEER1-BLK-08
NetHandle: NET-64-34-0-0-1
Parent: NET-64-0-0-0-0
NetType: Direct Allocation
Comment: For abuse issues please e-mail abuse@peer1.net. All
Comment: other inquiries can be directed to support@peer1.net. Our 24 x 7 NOC is
Comment: available at 866-484-2588
RegDate: 2004-07-15
Updated: 2006-11-06
Ref: whois.arin.net/rest/net/NET-64-34-0-0-1
OrgName: Peer 1 Network Inc.
OrgId: PER1
Address: 75 Broad Street
Address: 2nd Floor
City: New York
StateProv: NY
PostalCode: 10004
Country: US
RegDate:
Updated: 2010-07-22
Ref: whois.arin.net/rest/org/PER1
OrgAbuseHandle: NSA-ARIN
OrgAbuseName: Peer 1 Network AUP Enforcement
OrgAbusePhone: +1-604-484-2588
OrgAbuseEmail: abuse@peer1.net
OrgAbuseRef: whois.arin.net/rest/poc/NSA-ARIN
OrgTechHandle: ZP55-ARIN
OrgTechName: PEER 1 Network Inc
OrgTechPhone: +1-604-683-7747
OrgTechEmail: net-admin@peer1.net
OrgTechRef: whois.arin.net/rest/poc/ZP55-ARIN
RNOCHandle: ZP55-ARIN
RNOCName: PEER 1 Network Inc
RNOCPhone: +1-604-683-7747
RNOCEmail: net-admin@peer1.net
RNOCRef: whois.arin.net/rest/poc/ZP55-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: www.arin.net/whois_tou.html #

And indeed, superuser.com is hosted on Peer1 networks (see the bolded text).

This approach however is flawed though. If they used a load balancing service like Elastic Load Balancing; you would probably get the IP address of the load balancer, not the actual host. The same can be said for a proxy server.

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