Which IPs does PingPing.io use for monitoring?
PingPing monitors your websites from servers in 7 locations around the world. If your server uses a firewall, a Web Application Firewall (WAF), or rate-limiting rules, you may need to whitelist these IP addresses to prevent PingPing's checks from being blocked - which would cause false downtime alerts.
An up-to-date, machine-readable list is always available at https://pingping.io/ips.
Current Monitoring IP Addresses
Atlanta, USA - 66.42.82.97
Falkenstein, Germany - 78.46.191.13, 49.12.8.70, 138.199.151.21
Helsinki, Finland - 95.217.22.28, 95.217.8.178, 65.21.181.156
Nuremberg, Germany - 116.203.20.126, 88.198.157.52, 188.245.246.66
Sydney, Australia - 45.77.238.112
Tokyo, Japan - 207.148.105.122
Toronto, Canada - 155.138.142.157
These IPs may change over time as PingPing expands its monitoring infrastructure. The /ips endpoint is always the authoritative source.
Why Multi-Location Monitoring Matters
PingPing uses two-step verification to reduce false positives. When a check fails from one location, PingPing immediately re-checks from a second location on the other side of the world. Only if both checks fail is the outage confirmed and an alert sent. This prevents transient network issues between a single data center and your server from triggering false alarms.
This is especially important if your infrastructure uses a CDN (like Cloudflare or AWS CloudFront), because a CDN edge node in one region may fail while others remain healthy.
How to Whitelist PingPing IPs
The exact method depends on your hosting setup:
Cloudflare - Add the IPs to your WAF's IP Access Rules as "Allow"
AWS Security Groups - Add inbound rules allowing HTTP/HTTPS from each PingPing IP
Nginx / Apache - Use allow/deny directives to exempt PingPing IPs from rate limiting
cPanel / Plesk - Add the IPs to your firewall's whitelist section
If you use a rate-limiting service, make sure PingPing's IPs are excluded. Depending on your check interval, PingPing can send requests as often as every 30 seconds per monitored site, which can trip aggressive rate limits.
What Happens If PingPing Is Blocked?
If your firewall blocks PingPing's monitoring requests, you will see false downtime alerts in your dashboard. The status page will also incorrectly show your site as offline. Whitelisting resolves this immediately.