Step 1 Check NS record or A record
To ensure that the NS/A record(s) is correct. Here are our NS records:
A record: 188.8.131.52
You can access to the site: whois.domaintools.com and enter your domain name, all related information will show up, including the current NS records.
Step 2 Make sure your domain resolved successfully
If you are sure that NS/A record(s) is correct, here is another thing can cause the domain resolution failed. It's the time, it usually takes 2-48 hours until the resolution completed, so you are supposed to wait longer patiently.
You can use the third-party DNS to complete the process. We recommend you to the DNSPod.
The site is https://www.dnspod.com.
After finished all above, you need to modify the NS records as followed from your current domain registrar:
Access to my site temporarily
Adding the following record into the "hosts" file on your computer:
The path of "hosts" file is: C:\Windows\System32\drivers\etc
As you can see, you just input the host4asp IP with your domain. That's it. Now, you can enter your website successfully.