Overview
In March 2024, Auth0 shared a changelog update related to public cloud IP addresses, and email notifications have been sent for tenants in applicable public cloud regions at various times since then.
The changelog update included IP addresses that would become active at a future date. As part of a July 2025 service update, those reserved IP addresses will become eligible for use in outbound network requests for the first time.
Integrations configured in US, EU, AU, and JP public cloud tenants, requiring network requests originating from the Auth0 service to external endpoints behind network firewalls, may experience partial degradation or complete failure if firewalls are not configured adequately with an up-to-date IP allow list.
The change in active use IP addresses may affect several features, including, but not limited to:
- Actions
- Legacy extensibility (rules and hooks)
- Custom database connections
- Custom social connections
- Log streams
- Email delivery via SMTP providers
The nature of the impact may vary depending on the affected feature. For example, in a custom database connection with custom scripts performing requests to endpoints behind a firewall, user logins through the connection can fail completely or intermittently.
Applies To
- Networking
- Public Cloud IP Addresses
Solution
Update network firewall configurations to ensure they include the required IP addresses to allow traffic originating from an Auth0 tenant in the US, EU, AU, or JP public cloud regions.
More specifically, take the following actions:
- Include all Auth0 IP addresses from the respective region list in the firewall configuration.
- Remove any IP addresses that may be present in the firewall configuration but no longer appear in the respective region list.
Up-to-date Auth0 IP address lists are available at Auth0 IP Addresses for Allow Lists; this documentation page currently acts as the source of truth for this information.
The list of IP addresses associated with the July 2025 service update is included below for historical reference purposes only.
United States
174.129.105.183, 18.116.79.126, 18.117.64.128, 18.191.46.63, 18.218.158.118, 18.218.26.94, 18.232.225.224, 18.233.90.226, 3.131.238.180, 3.131.55.63, 3.132.201.78, 3.133.18.220, 3.134.176.17, 3.19.44.88, 3.20.16.23, 3.20.244.231, 3.21.254.195, 3.211.189.167, 34.211.191.214, 34.233.19.82, 34.233.190.223, 35.160.3.103, 35.162.47.8, 35.166.202.113, 35.167.74.121, 35.171.156.124, 35.82.131.220, 44.205.93.104, 44.218.235.21, 44.219.52.110, 44.224.190.45, 44.246.144.93, 52.12.243.90, 52.14.149.14, 52.2.61.131, 52.204.128.250, 52.206.34.127, 52.33.36.223, 52.43.255.209, 52.88.192.232, 52.89.116.72, 54.145.227.59, 54.157.101.160, 54.200.12.78, 54.209.32.202, 54.245.16.146, 54.245.93.221, 54.68.157.8, 54.69.107.228
Europe
18.197.9.11, 18.198.229.148, 3.125.185.137, 3.65.249.224, 3.67.233.131, 3.68.125.137, 3.72.27.152, 3.74.90.247, 34.246.118.27, 35.157.198.116, 35.157.221.52, 52.17.111.199, 52.19.3.147, 52.208.95.174, 52.210.121.45, 52.210.122.50, 52.28.184.187, 52.30.153.34, 52.57.230.214, 54.228.204.106, 54.228.86.224, 54.73.137.216, 54.75.208.179, 54.76.184.103
Australia
13.210.52.131, 13.238.180.132, 13.55.232.24, 16.50.37.252, 16.51.137.244, 16.51.49.47, 54.153.131.0, 54.252.2.143, 54.79.31.78
Japan
13.208.85.227, 15.152.185.222, 15.152.2.46, 15.152.28.221, 15.152.56.146, 15.152.95.63, 176.34.22.106, 35.74.30.168, 43.206.201.6, 46.51.243.250, 54.150.87.80, 54.248.192.141