r/Namecoin

Namecoin is a blockchain that acts as a decentralized alternative to the DNS and public TLS CA's, which resists censorship, hijacking, and MITM attacks.

Namecoin uses the .bit top-level domain. .bit domains are "special-use" (not part of the DNS; similar to .onion); hence, to resolve .bit domain names, one must have either a copy of the Namecoin blockchain (a full node such as Namecoin Core) or a lightweight SPV client (such as Electrum-NMC or ConsensusJ-Namecoin).