go
mail.tecos.de has one IP number , but the reverse is mail.geneos.de. mail.urbs.de, mail.bluh.de, mail.geneos.de, mail.quiesel.com, mail.balimo.info and at least 18 other hosts point to the same IP. tecos.de use this as a mailserver. tecos.de is a domain controlled by two nameservers at geneos.de. They are on different IP networks. Incoming mail for tecos.de is handled by one mailserver at tecos.de themselves. mail.tecos.de is hosted on a server in Germany.

mail.tecos.de
a records
 
+ 87.193.240.196 87.193.0.0/16 AS20676 mail.geneos.de
+ --- mail.geneos.de

tecos.de
ns-soa records
alas.geneos.de
+ 87.193.240.195 87.193.0.0/16 AS20676 -
+ --- -
ns records
alas.geneos.de
+ 87.193.240.195 87.193.0.0/16 AS20676 -
+ --- -
ns1.geneos.de
+ 85.159.58.242 85.159.56.0/21 AS8553  
+ ---  
mx records
mail.tecos.de
+ 87.193.240.196 87.193.0.0/16 AS20676 mail.geneos.de
+ --- mail.geneos.de
ip numbers of host
87.193.240.196
ptrs of ip numbers
mail.geneos.de
hostnames sharing ip with a-records
mail.airtruckservice.de
mail.balimo.info
mail.bluh.de
mail.canchanabury.de
mail.cosmetic-register.com
mail.ekugellager.de
mail.geneos.de
mail.kr-ask-a.com
mail.kr-ask-a.de
mail.krebsgesellschaft-nrw.de
mail.luxess-group.com
mail.make-love-not-law.com
mail.marxlorenz.de
mail.metallinox.de
mail.metaprofilemanagement.de
mail.orchesterverein-solingen.de
mail.quiesel.com
mail.schokoladenseite-finden.de
mail.urbs.de
mail.viewpoint.de
mail.zottelbude.com
port-87-193-240-196.static.qsc.de
webmail.geneos.de
domains using this as mailserver
tecos.de
domains using this as mailserver under another name
airtruckservice.de
balimo.info
canchanabury.de
geneos.de
kontrollierte-naturkosmetik.de
kr-ask-a.com
krebsgesellschaft-nrw.de
luxess-group.com
make-love-not-law.com
marxlorenz.de
metallinox.de
metaprofilemanagement.com
metaprofilemanagement.de
michele.de
orchesterverein-solingen.de
picard.de
quiesel.com
schokoladenseite-finden.de
urbs.de
viewpoint.de
zottelbude.com