Summary
ns61.1and1.fr has one IP number , which also has a corresponding reverse pointer.
2b.fr,
bff.fr,
ief.fr,
ose.fr,
tia.fr and at least 100 other hosts use this as a nameserver.
1and1.fr is a domain controlled by two nameservers at
1and1.fr themselves. They are on the same IP network. Incoming mail for
1and1.fr is handled by three mailservers at
schlund.de. All of them are on the same IP network.
1and1.fr has one IP number.
ns61.1and1.fr is hosted on a server in Germany even though the hostname implies France.