Hi, new version 0.80.0 is released now, credits to Andrey Behrens which reported a bug, that ipv6calc --out revnibbles.arpa is acting wrong, if a prefix length is given: version < 0.80.0: ipv6calc --out revnibbles.arpa abcd:1234:5678:abcd:1234:1234:1234:1234/125 4.3.2.1.4.3.2.1.4.3.2.1.4.3.2.1.d.c.b.a.8.7.6.5.4.3.2.1.d.c.b.a.ip6.arpa. fixed since 0.80.0: ipv6calc --out revnibbles.arpa abcd:1234:5678:abcd:1234:1234:1234:1234/125 0.3.2.1.4.3.2.1.4.3.2.1.4.3.2.1.d.c.b.a.8.7.6.5.4.3.2.1.d.c.b.a.ip6.arpa Just note that this breaks old behavior for addresses, if prefix length is given. Package and signature files can be found here: ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/ Major changes: lib/librfc1886.c: take care of prefix length before printing nibbles (bugfix, but breaking old behavior, if prefix length is used) Maintenance: - Database updates Regards, Peter