I changed the ns of the domain, and the site works from the old hosting. What could be the problem?

Question

Network administration

We transfer the site from one hosting to another. Everything is according to the rules - they uploaded the site to a new hosting, they all hooked up. Changed ns domain to new ones.
https://www.nic.ru/whois/ - indicates that the ns domain has changed. But the site is still working from the old hosting.
What could be the problem?

Answer 1

It usually takes up to 72 hours to change ns-servers. And recording data on whois does not always reflect the real picture of what is happening. They may be spelled out, but not yet fully switched.

Answer 2

It's just that your ISP's DNS hasn't been updated yet. Wait is all.

Answer 3

Just a notification about the change of ns came to the mail. Or is it worth the wait after that?

Answer 4

check ns records through google servers
dig domain.name @8.8.8.8
And see what ip shows

Answer 5

reset both your Windows
cache, browser
cache and equipment
cache and provider cache, or specify external Google dns on the router 8.8.8.8
If you need to work on the site now, write it to your host file and work until the site actually appears on the Internet.