Overview
You can use one of the following methods to check whether the DNS records of your domain name take effect:
Use the dig or nslookup command.
Overseas analysis validation test.
Use the dig or nslookup command
The dig and nslookup commands are used to query domain names. If the DNS records returned by the commands are the same as the DNS records you configured on Alibaba Cloud DNS, the DNS records take effect. Otherwise, check the TTL values of the records and perform the test again after the TTL expires.
Linux commands
1 . Query the domain name.
Command: dig domain
Example: dig www.dns-example.top
2 . Query DNS records of a specified type, for example, MX, CNAME, NS, or PTR. You can specify a record type at the end of the command.
Command: dig domain cnameExample: dig www.dns-example.top cname
3 . Query DNS records from a specified DNS server. In the following commands, an authoritative DNS server provided by Alibaba Cloud DNS and a public DNS server are specified:
Command: dig domain @NS SERVER
Example: dig dns-example.top @vip7.alidns.com
4 . Use the +trace option in the dig command to track the complete resolution process of the domain name. The command output includes information about the root DNS servers, top-level DNS servers, and authoritative DNS servers of the domain name and the DNS records they return.
Command: dig domain +trace
Example: dig dns-example.top +trace
5 . Specify a local DNS server and check the complete resolution process of the domain name.
Command: dig domain @local DNS server address +trace
Example: dig dns-example.top @114.114.114.114 +trace
Windows commands
1 . Query the domain name from a local DNS server.
Command: nslookup domain
Example: nslookup dns-example.top
2 . Query the domain name from a public DNS server.
Command: nslookup domain NS server
Example: nslookup dns-example.top 114.114.114.114
3 . Query the domain name from an authoritative DNS server.
Command: nslookup domain DNS servername
Example: nslookup dns-example.top vip7.alidns.com
4 . Query non-A records. For example, to query the CNAME records.
Command: nslookup -q=cname domain
Example: nslookup -q=cname test.dns-example.top
Overseas analysis validation test
You can use tools to test the effectiveness of the resolution of the domain name overseas. If the DNS records returned by the tool are the same as the DNS records you configured, the DNS records take effect. Otherwise, check the TTL values of the records and perform the test again after the TTL expires.
