I'd be surprised if they didn't have some form of rate limiting. Here are some reasons Google DNS does it https://developers.google.com/speed/public-dns/docs/se

I'd be surprised if they didn't have some form of rate limiting. Here are some reasons Google DNS does it https://developers.google.com/speed/public-dns/docs/security#rate_limit https://developers.google.com/speed/public-dns/docs/security....