IPv4: 198.27.83.222 IPv6: 2607:5300:60:24de::

IPv4: 192.99.21.124 IPv6: 2607:5300:60:467c::

IPv4: 167.114.64.88 IPv6: 2607:5300:60:6558::

IPv4: 167.114.64.21 IPv6: 2607:5300:60:6515::

Our bots will use IPv4 unless the destination server forces us to use IPv6.
A JSON format IP list could be found at https://www.workcron.com/ips.json.