.gitignore

node_modules
package-lock.json

getSolDomainOwner.js

#!/usr/bin/env node

const {
  getHashedName,
  getNameAccountKey,
  NameRegistryState,
} = require("@solana/spl-name-service");

const {
  Connection,
  clusterApiUrl,
  PublicKey,
} = require("@solana/web3.js");

const getSolDomainOwner = async (domain) => {
  const { owner } = await NameRegistryState.retrieve(
    new Connection(clusterApiUrl("mainnet-beta")),
    await getNameAccountKey(
      await getHashedName(domain.replace(".sol", "")),
      null,
      new PublicKey("58PwtjSDuFHuUkYjH9BYnnQKHfwo9reZhC2zMJv9JPkx")
    )
  );
  return owner;
};

(async function() {
  const args = process.argv.slice(2)
  await Promise.all(args.map(async arg => {
    const owner = await getSolDomainOwner(arg);
    console.log(arg, '\t', owner.toString())
  }))
  process.exit(0)
}());

package.json

{
  "name": "1fd54ada3dee5825e9c7c58e96b4dd22",
  "bin": "./getSolDomainOwner.js",
  "dependencies": {
    "@solana/spl-name-service": "^0.1.3"
  }
}

Made this runnable via npx

➜  ~ npx https://gist.github.com/levicook/1fd54ada3dee5825e9c7c58e96b4dd22 levi.sol korg.sol
Need to install the following packages:
  gist:1fd54ada3dee5825e9c7c58e96b4dd22
Ok to proceed? (y) y
korg.sol 	 JUskoxS2PTiaBpxfGaAPgf3cUNhdeYFGMKdL6mZKKfR
levi.sol 	 JUskoxS2PTiaBpxfGaAPgf3cUNhdeYFGMKdL6mZKKfR