[{"data":1,"prerenderedAt":60},["ShallowReactive",2],{"$fvan6vct07kk9":3},{"title":4,"seoTitle":5,"description":6,"route":7,"kind":8,"toolKey":9,"intro":10,"indexable":11,"sections":12,"related":56},"DNS 查詢與線上 NSLookup","DNS 查詢與線上 NSLookup | nslookup.online","線上查詢網域 DNS 記錄、TTL 與公共解析器回應，支援多種記錄類型，解釋 NXDOMAIN、SERVFAIL 與無記錄狀態。","\u002Fzh-tw\u002F","tool","dns","使用公共解析器查詢 DNS，理解記錄與回應含義。",true,[13,20,44,50],{"id":14,"title":15,"paragraphs":16,"code":19},"read-answer","讀懂回應，而不只是查看記錄",[17,18],"DNS 查詢向解析器詢問特定名稱的記錄。請輸入準確主機名稱並選擇類型。結果僅代表該解析器當時的視圖，不是所有 DNS 伺服器的調查。","IPv4 選 A，IPv6 選 AAAA。保持名稱不變可切換郵件、驗證文字或名稱伺服器記錄。「常用記錄」分別傳送六類查詢，並非 ANY 請求。","example.com.    300    IN    A    192.0.2.10\n名稱            TTL   類別 類型 值\n\n文件範例 — 非即時 DNS 回應",{"id":21,"title":22,"paragraphs":23,"rows":25},"reference","DNS 回應的各個欄位",[24],"名稱表示記錄發布位置，類型決定如何解讀值，TTL 是以秒計的快取有效期，不是全球傳播完成時間，也不保證所有使用者同步看到變更。",[26,29,32,35,38,41],{"label":27,"value":28},"A \u002F AAAA","此名稱的 IPv4 \u002F IPv6 位址。",{"label":30,"value":31},"MX","郵件路由目標及數字優先順序。",{"label":33,"value":34},"TXT","驗證文字與郵件策略。",{"label":36,"value":37},"CNAME","一個 DNS 名稱指向另一名稱的別名。",{"label":39,"value":40},"NS \u002F SOA","名稱伺服器及區域權威中繼資料。",{"label":42,"value":43},"PTR \u002F SRV \u002F CAA","反向名稱、服務目標或憑證授權機構許可。",{"id":45,"title":46,"paragraphs":47},"different-answers","為何兩個工具的答案不同",[48,49],"解析器可能保留不同快取、存取不同權威基礎設施，並受到路由與設定影響。Google 與 Cloudflare 的比較只是解析器對照，不是全球傳播檢測。","HTTPS 往返包含瀏覽器網路、TLS、服務與傳輸的時間，並非權威伺服器的純解析時間，不能用來替解析器排名。",{"id":51,"title":52,"paragraphs":53},"questions","常見問題",[54,55],"NOERROR 無指定記錄不代表名稱不存在。NXDOMAIN 表示所選解析器回報名稱不存在，不表示網域可供註冊。","SERVFAIL、REFUSED 和網路逾時有不同含義。HTTP 故障無法判定 DNS 狀態；請保留成功記錄，手動重試或選另一解析器。",[57,58,59],"\u002Fguides\u002Fnslookup-command\u002F","\u002Fguides\u002Fa-record-vs-cname\u002F","\u002Fmx-lookup\u002F",1792661399340]