This article explains the PayPay source IP addresses used when PayPay sends Webhook notifications to the merchant server.
Webhook notification source IP addresses
Sandbox environment
13.112.237.64
52.199.148.9
54.199.212.149
13.208.106.122
13.208.115.200
13.208.152.196
Production environment
52.68.128.84
52.192.112.175
13.115.29.37
13.208.67.224
13.208.235.224
13.208.127.89