Hola.
La respuesta a tu pregunta es: El servidor con esa IP pertenece a Lycos, y en un mismo servidor se pueden albergar diferentes páginas web con nombres diferentes. Por lo tanto, muchas 
http://www.******.*** pueden apuntar a una misma IP, si estan alojadas en el mismo servidor. 
El protocolo IP  no permite que haya duplicidad de IP's.
A continuacion te adjunto la informacion obtenida de RIPE, (
http://www.ripe.net) de su database whois!! para la ip 218.78.206.150
inetnum:         212.78.206.0 - 212.78.206.255
netname:         LYCOS-WEBCENTER
descr:           Webcenter hosting
descr:           Lycos Europe
country:         SE
admin-c:         JS5687-RIPE
tech-c:          SH2596-RIPE
tech-c:          KD849-RIPE
status:          ASSIGNED PA 
remarks:         For abuse issues, please contact 
abuse@lycos-europe.com
mnt-by:          MNT-LYCEU
source:          RIPE # Filtered
person:          Johannes Spangenberg
address:         Lycos Europe GmbH
phone:           +49 5241 8071 313
mnt-by:          MNT-LYCEU
nic-hdl:         JS5687-RIPE
source:          RIPE # Filtered
person:          Stefan Hegger
address:         Lycos Europe GmbH
address:         Carl Bertelsmann Str 29
address:         DE-33311 Guetersloh
address:         Germany
phone:           +49 5241 8071 334
fax-no:          +49 5241 80671 334
remarks:         ----------------------------------------------
remarks:         do NOT e-mail abuse to contacts given here,
remarks:         e-mail them to 
abuse@lycos-europe.com instead.
remarks:         (as shown below at "abuse-mailbox:") You will receive a ticket number.
remarks:         or contact our service desk under  +49 5154 705 413 after receiving a ticket number from our ticket system
abuse-mailbox:   
abuse@lycos-europe.com
mnt-by:          MNT-LYCEU
nic-hdl:         SH2596-RIPE
source:          RIPE # Filtered
person:          Konstantion Dounaev
address:         Lycos Europe GmbH
address:         Carl Bertelsmann Str 29
address:         DE-33311 Guetersloh
address:         Germany
phone:           +49 5241 8071 327
mnt-by:          MNT-LYCEU
nic-hdl:         KD849-RIPE
source:          RIPE # Filtered
% Information related to '212.78.192.0/19AS12832'
route:           212.78.192.0/19
descr:           Lycos Europe (Spray Network Services AB)
origin:          AS12832
mnt-by:          MNT-LYCEU
source:          RIPE # Filtered