They usually ask you to set an A and CNAME record in your domain settings. How does me entering these details translate into them being able to service a request to my domain? How do they know which website to service if all their customers are pointing to the same records?
Ask HN: How do services allow you to use custom domains?
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Re: Ask HN: How do services allow you to use custom domains?
#2The request says which domain it is for.