About
routing.pl is a set of network tools in Polish and English: IPv4 and IPv6 subnet calculators, VLSM, route aggregation and DNS, BGP, whois and TLS diagnostics. The project grows one tool at a time.
Some tools calculate entirely in your browser. Others use public APIs, and the tests that have to run on a server (SSL/TLS, ports, traceroute, MTU, DNSBL blacklists) are run by the routing.pl server.