DNS lookup

كيفية استخدام DNS lookup

ما الذي يحسبه ومتى تستخدمه

Looks up the DNS records من a domain name: its IPv4 وIPv6 addresses (A وAAAA) وmail servers (MX), الاسم servers (NS), text records (TXT), aliases (CNAME), النطاق التفاصيل (SOA) ومن certificate rules (CAA). Use it إلى check that a domain points where you expect ومن or إلى debug email وwebsite set-up.

طريقة الاستخدام خطوة بخطوة

1. Type a domain الاسم such as مثال.com.
2. Choose a record type, أو إبقاء “All common records”.
3. Press “Look up DNS”.
4. Read للقطعة record card. TTL هو how many ثوانٍ the answer may be cached.

معنى كل مُدخل

• Domain الاسم – من The domain إلى من look up. Web addresses are cleaned إلى the domain, so https://example.com/page also works.
• Record type – One record type, أو all the common ones.

كيف تقرأ النتائج

• A وAAAA – The IPv4 وIPv6 addresses the الاسم النقاط إلى.
• MX – Mail servers, with a priority الرقم. Lower الأرقام are tried first.
• NS, TXT, CNAME, SOA, CAA – الاسم servers وtext records such as SPF, aliases, النطاق authority وwhich certificate authorities may issue certificates.

الصيغة

لا calculation. The browser asks Cloudflare’s public DNS over HTTPS service مقابل each record type وshows the answers it gets. TTL هو the time في seconds that resolvers may cache an answer.

مثال محلول

A lookup من example.com returns an A record with an IPv4 address وMX records مقابل mail, وTXT records including its SPF policy.

الافتراضات والحدود

• Answers come from a public resolver وmay be cached مقابل من up إلى the TTL, so a change made a few minutes ago may not show yet.
• The lookup هو made when you press the button.
• Only the common record types are offered.

أخطاء شائعة

• الTyping a full web address with a pa وexpecting records مقابل the page. DNS works on domain names only.
• من Expecting a التغير إلى عرض immediately. Caches hold old answers حتى the TTL runs out.
• Looking up a subdomain you have not created, which returns لا records.

الأسئلة الشائعة

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