DNS查詢
查詢任意網域的DNS記錄（A、AAAA、MX、TXT、NS、CNAME）。適用於排查郵件、主機代管和SSL設定問題。
如何使用本工具
- 1
Type a domain name such as example.com into the input field (enter the bare domain, not a full https:// URL).
- 2
Click Lookup DNS to send the query.
- 3
Read the returned record sets in the JSON panel below, grouped by record type (A, AAAA, NS, SOA, MX, TXT).
- 4
Edit the domain and run it again to compare another host or re-check after a DNS change.
什麼是DNS？
DNS（網域名稱系統）將人類可讀的網域名稱對應到機器的IP位址。每當你造訪一個網站時，瀏覽器都會向DNS伺服器查詢代管該網站的IP位址。DNS記錄控制的不僅僅是IP位址：MX記錄負責路由郵件，TXT記錄保存驗證權杖和SPF資訊，NS記錄則定義哪個DNS服務商具有權威性。本工具直接向權威DNS伺服器查詢，以取得最新資料。
常見使用場景
Confirm an A or AAAA record points to the right server IP after migrating hosting providers.
Check MX records and their priorities when email is bouncing or not being delivered.
Verify a TXT record for SPF, DKIM, or a domain-ownership token required by Google, Microsoft, or an SSL issuer.
Find which name servers (NS) are authoritative for a domain before or after a registrar transfer.
Inspect the SOA serial number to see whether a recent zone change has actually been published.
Quickly compare the published records of two domains side by side while troubleshooting.