您的域的DNS报表

什么是dns？

连接到internet的所有设备都具有唯一的IP或internet协议地址。但期望用户记住这些数字是不合逻辑的。取而代之的是，每个设备都有一个域名，访问者可以使用该域名访问它们。

dns或域名系统是互联网的电话簿。DNS将人类用来访问网站的域名转换为web浏览器加载internet资源所需的IP地址。

想要在DNS报告中查看哪些记录？

DNS 记录是文本文件，包含有关特定域名的整体信息，包括其 IP 地址、别名等。以下是一些常见的 DNS 记录：

• A 记录：列出域的 IPV4 地址。
• AAAA 记录：列出主机的 IPV6 地址。
• CName：列出给定地址是域的别名还是子域。所有 CName 记录都指向域而不是 IP 地址。
• MX 记录：列出相应域的 SMTP 电子邮件服务器。
• TXT 记录：列出机器可读的数据，例如加密细节、发件人策略框架、DKIM、DMARC 等。
• NS 记录 - 列出相应域的权威名称服务器的名称和详细信息
• SOA Record: Contains administrative information about the DNS zone, including the primary name server, hostmaster email, serial number, and timing values for refresh, retry, and expiry.
• PTR Record: Used for reverse DNS lookups, mapping an IP address back to a domain name. PTR records are essential for email server validation.

How to Perform a DNS Lookup

Follow these steps to run a DNS lookup using this free tool:

1. Enter the domain name (e.g., example.com) in the input field above.
2. Click Analyze to start the DNS lookup.
3. Review the results, which include MX records, SOA records, reverse DNS lookup, name server performance, and DNS traversal data.
4. Use the tabbed results to run additional checks such as website availability, ping tests, IP lookups, and geolocation.

Understanding Your DNS Lookup Results

When you run a DNS lookup with this tool, the report is organized into the following sections:

• MX Records: Shows the mail exchange servers for the domain, their IP addresses, TTL values, and priority. Lower priority numbers indicate preferred mail servers.
• SOA Record: Displays zone authority details including the primary server, hostmaster contact, serial number, and timing intervals for refresh, retry, and expiry.
• Reverse DNS Lookup: Checks whether the domain's IP addresses have valid PTR records, which is important for email deliverability and server trust.
• Name Server Performance: Tests each authoritative name server for the domain, showing resolved IPs, TTL values, response times, and availability status.
• DNS Traversal: Traces the full DNS resolution path from root servers through TLD servers to authoritative name servers, showing response times at each hop.
• Namespace Server Delegation: Verifies that the parent zone correctly delegates to the domain's name servers and checks for consistent glue records.

使用Site24x7 DNS 工具的好处：

Site24x7 的 DNS 查找工具列出输入域名的相关 DNS 记录。这很方便，因为对 DNS 记录的任何更改都会立即捕获。您还可以使用 Site24x7 DNS 监控来监控您的分布式 DNS 基础架构。

• Comprehensive report: Retrieve MX, SOA, NS, reverse DNS, name server performance, and DNS traversal results in a single lookup.
• Instant results: Get your DNS records displayed immediately with no signup required.
• Troubleshooting: Identify misconfigured records, missing mail servers, or delegation issues quickly.
• Free and unlimited: Run as many DNS lookups as you need at no cost.

FAQs