For those who need to know the IPs with which Googlebot visits a site, here is an extensive list of these IPs
Attention, it is possible that Google may use other classes of unknown IPs, the list is only informal IPv4 list, but it is valid for most Googlebot traffic.
For me, it was needed in a filter in the HAProxy firewall, to filter traffic.
acl whitelist src -f /etc/haproxy/google-ip.lst
The full list of Google’s IPs registered by Google LLC and ASN: AS15169, can be found here: