Whitelisting by IP is not recommended. The SAP Cloud Platform Open Connectors platform is a public cloud hosted by AWS, and shared IPs may change without notice; accordingly, the recipient would be whitelisting all traffic from SAP Cloud Platform Open Connectors.
If whitelisting by IP is the only option, the recipient domain will want to check for the most up-to-date IP information by downloading our ip-ranges file. This file will be updated whenever new IPs are added to SAP Cloud Platform Open Connectors' IP range. If a receiving server is whitelisting the range, it's recommended they periodically check to ensure they have the current range.