DNS nameservers correctly assigned to Netlify, but website is unstable

I successfully redirected the name servers for my custom domain to Netlify but my site is sometimes inaccessible and sometimes accessible. It opens for some users, and not others, irrespective of their devices. There are days, I can’t even open it.

  • When I use a DNS checker to check the DNS resolution of the site, on some days, the checker shows successfully resolved all through, on others, it shows the resolution as failed all through.

Things I’ve tried

  • Removing and re-adding the domain in the Netlify control panel
  • Waiting 24 hours.
  • Reactivating the DNS zone for the production domain

Debugging information

The domain is hosted at QServers. It’s correctly redirected. When I run the dig. command, I get the following output below:

; <<>> DiG 9.10.6 <<>> tagafrica.com.ng NS +trace
;; global options: +cmd
;; Received 28 bytes from 192.168.1.1#53(192.168.1.1) in 243 ms

When I run the whois command, I get the following output below which shows that DNS configuration is correct :

Name Server: dns3.p07.nsone.net
Name Server: dns4.p07.nsone.net
Name Server: dns1.p07.nsone.net
Name Server: dns2.p07.nsone.net

I’ve been stuck on this for over a week. Any help would be appreciated

This is a duplicate thread of / additional information for:
https://answers.netlify.com/t/netlify-site-fails-randomly-and-users-are-unable-to-access-it/137952