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bvtk02.synserver.de has one IP number , which also has a corresponding reverse pointer. synserver.de is a domain controlled by four nameservers at synserver.de themselves. Some of them are on the same IP network. Incoming mail for synserver.de is handled by two mailservers also at synserver.de. They are on the same IP network. synserver.de has one IP number. bvtk02.synserver.de is hosted on a server in Netherlands even though the hostname implies Germany.

bvtk02.synserver.de
a records
 
+ 217.119.57.18 217.119.48.0/20 AS31100 -
+ --- -

synserver.de
a records
 
+ 217.119.50.105 217.119.48.0/20 AS31100  
+ ---  
ns-soa records
ns1.synserver.de
+ 217.119.49.19 217.119.48.0/20 AS31100 neon-ld-048.synserver.de
+ --- neon-ld-048.synserver.de
ns records
ns1.synserver.de
+ 217.119.49.19 217.119.48.0/20 AS31100 neon-ld-048.synserver.de
+ --- neon-ld-048.synserver.de
ns2.synserver.de
+ 217.119.53.3 217.119.48.0/20 AS31100 ohm.synserver.de
+ --- ohm.synserver.de
ns3.synserver.de
+ 217.119.50.210 217.119.48.0/20 AS31100 -
+ --- -
ns4.synserver.de
+ 85.93.64.71 85.93.64.0/19 AS34289 neon-ld-149.synserver.de
+ --- neon-ld-149.synserver.de
mx records
mx-in-1.synserver.de
+ 217.119.50.37 217.119.48.0/20 AS31100 -
+ --- -
mx-in-2.synserver.de
+ 217.119.50.38 217.119.48.0/20 AS31100 -
ip numbers of host
217.119.57.18
ptrs of ip numbers
bvtk02.synserver.de
ip numbers using ptr to this host
217.119.57.18
217.119.57.19
217.119.57.20
217.119.57.21
217.119.57.22