DNS-based Host Blocker (and lightweight ad blocker) for Android
...For hosts, a later entry overrides a previous entry; for DNS servers, the first server is preferred. There's also no validation of input, so DNS servers that are not valid IPv4 addresses are not rejected, neither are URLs for DNS server entries (we intend to support URLs in the future, so you can point the app to a remote list of servers).
A simple DNS analysis tool providing both IPv4 & IPv6 queries for A, NS, CNAME, SOA, MB, MG, MR, NULL, WKS, PTR, HINFO, MINFO, MX, TXT, AAAA, DS, RRSIG, NSEC, DNSKEY records. Also provides authorithy check and DNSSEC support.
The Internet Protocol Address Calculator is an open-source java-based tool. This calculator will assist network administrators to perform calculations over both IPv4 and IPv6 address space. A handy whois search client is also integrated into this tool.
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