Different projects have taken a shot at developing a distributed naming service utilizing the blockchain technology, even before the now popular Ethereum Naming Service (ENS). Most notably, is Namecoin - an experimental open-source technology aimed at this purpose and other internet infrastructure as well. It’s forked off Bitcoin blockchain to free domain name services and other web2 technologies from central points of censorship and failure.
Below are some of the blockchain domain name services and the TLDs associated with them.
Namecoin - .bit
Unstoppable Domains - .zil, .crypto, .coin, .wallet, .bitcoin, .x, .888, .nft, .dao
Ethereum Name Service - .eth
PeerName - .bit, .coin, .bazar, .emc, .lib and .onion
Owning blockchain domains, similar to owning classic domain names do not come for free. However, a significant difference that exists is that they could be purchased one time for all. No subscriptions or renewals. These blockchain domains are in the form of NFTs and are held in the owner’s wallet.