0.252.83.10.in-addr.arpa.   IN PTR fbl-dns.fff.community.
1.252.83.10.in-addr.arpa.   IN PTR fff-nue2-gw2.gw.fff.community.
2.252.83.10.in-addr.arpa.   IN PTR fff-nue2-gw1.gw.fff.community.
4.252.83.10.in-addr.arpa.   IN PTR hades.sgstbr.de.