PayPal
PayPal documents CIDR ranges for API, IPN, and SFTP endpoints. They recommend using DNS resolution with default TTL values rather than hard-coding IPs, but publish ranges for firewall allowlists.
Autonomous systems
AS17012
PayPal server endpoint IP ranges Documentation
Published prefixes
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64.4.240.0/21 -
64.4.248.0/22 -
66.211.168.0/22 -
91.243.72.0/23 -
173.0.80.0/20 -
185.177.52.0/22 -
192.160.215.0/24 -
198.54.216.0/23