✅ ZeroSSL supports issuing certificates for IP addresses.
However, there are some exceptions and the validation is different.
No certificate will be issued for reserved IP addresses.
Private IP addresses but also a few others - the list includes, but is not limited to the following: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
- Validation options are restricted to HTTP.
Only 1 out of the 3 verification methods ZeroSSL supports.