Nameservers not registering?

For about 3 days now, I changed my nameservers on my domain provider, and yet Cloudflare seems to not understand that I changed it. Is this a server side issue? Or is it from the Domain provider?

Hi @singhpk, could be any one of a number of issues, most popular issues are covered in the quick fix ideas of this tip, Community Tip - Fixing “Pending Nameserver Update”. Can you share the name of the domain?