Hi,
Thank you for reaching out to us. There is not a way to review historical data about IPs. Attackers abusing WARP unfortunately does happen from time to time. We constantly investigate reports of abuse via WARP and other sources and make improvements to mitigate abuse of WARP as much as possible.
If you want to be certain of your egress IPs, I would recommend dedicated egress for WARP:
To prevent similar attacks in the future, we would suggest deploying rate limiting:
That being said, would you mind submitting a ticket providing us with more information for further investigation regarding this?
Kindly,