ISP's blockage redirect

Hi guys, would like to know, if there is an alternative to 301 redirect when the domain is blocked by ISPs in a specific country?
And is there a way to confirm what ISPs are blocking a specific IP number?

The problem is when an ISP blocks a domain, they are blocking it via their DNS or gateway.

So even before the website is loaded, the ISP would have effectively redirected your traffic to their blocked page. So doing a 301 redirect won't help.

The only solution is to get a new domain name or ask your audience to use a VPN. But that would just result in a cat-and-mouse game - they ban your new domains and you get new domains, and so on.

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