The IP addresses of Webhook notification source PayPay server are fixed as follows.
Test 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