Route 53 Supported Record Types: A, AAAA, CNAME, NS Explained

Mastering DNS records: A (IPv4), AAAA (IPv6), CNAME (map to hostname) & NS (authoritative name server). Know when to use each for load balancing, localization & delegation.

This short article is based on Route 53 supported record types, but it supposes to be a general knowledge that can be applied on any cloud platforms and DNS providers.
I'll only cover the most common ones you have a high chance to come across which are A, AAAA, CNAME, NS.

  
  
  Overview

A - map a hostname to IPv4
AAAA - map a hostname to IPv6
CNAME - map a hostname to another hostname
NS - point to the name of the authoritative name server

That might sound simple enough, you might end up here because you don't understand when to use each of them.

  
  
  A & AAAA

These guys are the simp...

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