The best alternatives to NsLookup are DNSPerf, How DNS Works, and rad.dad. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
rad.dad gives you the raddest email address (you@rad.dad) and web address (you.rad.dad) imaginable, along with full control over your domain’s DNS for flexible usage across the internet.