Summary
ns11.az.pl has one IP number , which also has a corresponding reverse pointer.
lf.pl,
az.pl,
bi.pl,
jan.pl,
iws.pl and at least 100 other hosts use this as a nameserver.
az.pl is a domain controlled by two nameservers at
az.pl themselves. They are on the same IP network. Incoming mail for
az.pl is handled by one mailserver also at
az.pl.
az.pl has one IP number.
ns11.az.pl is hosted on a server in Poland.