Hi!

  We monitor a website from the Toronto – CA location. Our origin sits behind a WAF/CDN, and we allowlist your published monitoring source IPs so your probes aren't blocked.

  We reference this page for the current IP list:
  https://www.site24x7.com/multi-location-web-site-monitoring.html

  Recently our monitor went DOWN with the reason "This url is forbidden." This is a WAF block, which means the probe reached us from a source IP that is not on the published list for the Toronto location.

  From our logs, the probe appeared to originate from addresses such as 2600:3c04::f03c:92ff:fe3e:a3d8, 2001:19c0:1::3102, 2001:19c0:1::2802, or 2602:fec3:200::2. We can't be certain these are yours, precisely because they are not listed on the page above.

  Could you please:

  1. Update the published page with the complete, current set of source IPs for the Toronto – CA location, and
  2. Confirm whether you maintain a canonical, machine-readable list (e.g. JSON/API) we can pull so our allowlist stays in sync as your probe IPs change.

  This would let us keep your probes allowlisted and avoid false DOWN alerts. Thanks!