title: How to add TXT records in Route 53 for subdomains
body: <p>I am migrating a zone (eg. example.com) from on-premise DNS server to Route 53. The zone has a TXT record with multiple values for example.com. Similarly, it has TXT records for several subdomains (eg. client.example.com, mails.example.com) under the same zone.</p>
  <p>I created separate TXT records for each subdomain as it was previously present in the on-premise DNS server and using simple routing. But <a href="https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html#TXTFormat" rel="nofollow noreferrer">AWS documentation</a> asks to include all values for a domain or subdomain in the same TXT record, but doesn't give any example or explain why it is needed.</p>
  <p>Is it mandatory to give all TXT records for the domain and subdomain in single TXT record while using simple routing? If so, how to specify the subdomain names?</p>