These CIDRS for EU-DE Control Plane are mentioned in the IAM docs, but not in the region docs for eu-central. We have a customer hitting IP 161.156.188.198 which falls under CIDR 161.156.188.192/28 and is listed in THIS DOC
161.156.188.96/27
161.156.188.128/27
161.156.188.192/28
161.156.188.96/27