Anhand einer IP den Hostnamen ermitteln?

nslookup 217.118.168.80 8.8.8.8

lks@nana:~$ whois 80.168.118.217
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '80.168.0.0 - 80.168.255.255'

% Abuse contact for '80.168.0.0 - 80.168.255.255' is 'abuse@clara.net'

inetnum:        80.168.0.0 - 80.168.255.255
netname:        UK-CLARANET-20030303
country:        GB
org:            ORG-CA48-RIPE
admin-c:        CH309-RIPE
tech-c:         CH309-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS8426-MNT
mnt-lower:      AS8426-MNT
mnt-routes:     AS8426-MNT
created:        2003-03-03T08:37:20Z
last-modified:  2016-05-18T16:36:23Z
source:         RIPE # Filtered

organisation:   ORG-CA48-RIPE
org-name:       ClaraNET LTD
org-type:       LIR
address:        21 Southampton Row, Holborn
address:        WC1B 5HA
address:        London
address:        UNITED KINGDOM
phone:          +442076858000
fax-no:         +442076858001
admin-c:        CH309-RIPE
abuse-c:        CH309-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AS8426-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS8426-MNT
created:        2004-04-17T12:12:24Z
last-modified:  2016-05-18T16:36:06Z
source:         RIPE # Filtered

role:           Claranet Hostmaster
address:        Claranet UK Ltd
address:        21 Southampton Row
address:        London WC1B 5HA
address:        United Kingdom
phone:          +44 (0) 20 7685 8000
fax-no:         +44 (0) 20 7685 8001
remarks:        Claranet UK Hostmaster
remarks:        All abuse reports to abuse@clara.net
remarks:        hsc-vh is authorised
admin-c:        OPS16-RIPE
tech-c:         OPS16-RIPE
nic-hdl:        CH309-RIPE
mnt-by:         AS8426-MNT
created:        2002-09-18T09:59:38Z
last-modified:  2016-06-30T23:33:24Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@clara.net
org:            ORG-CA48-RIPE

% Information related to '80.168.0.0/16AS8426'

route:          80.168.0.0/16
descr:          CLARA-AGG5
origin:         AS8426
mnt-by:         AS8426-MNT
created:        2003-04-08T11:31:51Z
last-modified:  2007-04-10T13:41:47Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.87.4 (BLAARKOP)

lks@nana:~$ whois 217.118.168.80
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '217.118.168.0 - 217.118.168.255'

% Abuse contact for '217.118.168.0 - 217.118.168.255' is 'domain-admin@rtl.nl'

inetnum:        217.118.168.0 - 217.118.168.255
netname:        RTL-D
descr:          RTL-D Video portal
remarks:        INFRA-AW
country:        DE
admin-c:        MvDL35-RIPE
tech-c:         STAN8-RIPE
status:         ASSIGNED PA
mnt-by:         MNT-RA1596
mnt-lower:      MNT-RA1596
mnt-lower:      MNT-RA1596
created:        2009-03-17T11:20:17Z
last-modified:  2016-02-10T13:30:09Z
source:         RIPE

person:         Marjolein van der Linden
address:        RTL-NL t.a.v. RTLNederland Interactief
address:        Postbus 15016
address:        1200 TV Hilversum
phone:          +31 (0)356718718
fax-no:         +31 (0)356718980
nic-hdl:        MvdL35-RIPE
created:        2007-01-09T11:03:41Z
last-modified:  2016-03-01T15:42:32Z
source:         RIPE # Filtered
mnt-by:         MNT-HMG

person:         Stanley Overloop
address:        RTL-NL t.a.v. RTLNederland Digital Media
address:        Postbus 15016
address:        1200 TV Hilversum
phone:          +31 (0)356718718
nic-hdl:        STAN8-RIPE
mnt-by:         MNT-HMG
created:        2013-12-18T12:41:22Z
last-modified:  2016-03-01T16:02:04Z
source:         RIPE

% Information related to '217.118.168.0/22as20504'

route:          217.118.168.0/22
descr:          RTL interactive Frankfurt
origin:         as20504
mnt-by:         MNT-HMG
mnt-routes:     MNT-RA1596
created:        2009-03-16T14:03:29Z
last-modified:  2009-03-16T14:03:29Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.87.4 (BLAARKOP)