關於「PTR record」標籤，搜尋引擎有相關的訊息討論：

What is a DNS PTR record? - Cloudflarewww.cloudflare.com › learning › dns › dns-ptr-recordWhat Is a DNS PTR Record & What Is It Used For? | Okta Singaporewww.okta.com › identity-101 › ptr-recordIP Address does not have a PTR record in DNS - Microsoft Learnlearn.microsoft.co