Можно по принадлежности ip-адреса, но это не гарантировано, так как маленькие хостеры не владеют сами ip-адресами, а берут их у больших.
rgbeast@ns2:~ $ host alimenty.ru
alimenty.ru has address 92.241.176.117
rgbeast@ns2:~ $ whois 92.241.176.117
[Querying whois.arin.net]
[Redirected to whois.ripe.net:43]
[Querying whois.ripe.net]
[whois.ripe.net]
% This is the RIPE Whois query server #3.
% The objects are in RPSL format.
%
% Rights restricted by copyright.
% See
http://www.ripe.net/db/copyright.html
% Note: This output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to '92.241.176.0 - 92.241.177.255'
inetnum: 92.241.176.0 - 92.241.177.255
netname: NETPLACE
descr: NETPLACE
country: RU
admin-c: PM946-RIPE
tech-c: PM946-RIPE
status: ASSIGNED PA
mnt-by: RU-WEBALTA-MNT
source: RIPE # Filtered
person: Pavel Malinkovich
address: Tevosyana 40a-89
address: Electrostal, Moscow Region
address: Russia
phone: +7 495 5434485
abuse-mailbox:
abuse@netplace.ru
nic-hdl: PM946-RIPE
source: RIPE # Filtered
% Information related to '92.241.160.0/19AS41947'
route: 92.241.160.0/19
descr: Wahome IP's =)
origin: AS41947
mnt-by: RU-WEBALTA-MNT
source: RIPE # Filtered