Ops School

opsschool.org · HTTP 521 in 250 ms

3 things were found in the response on 07.10.2026. This is the front door only: whatever runs behind a login, and anything a browser would have to execute to reveal, is not here.

Where it is served from

Cloudflarecdn

header — server: cloudflare
header — cf-ray: a46abf131d099118-FRA

Where their email goes

Google Workspacewebmail · email

dns — MX 1 aspmx.l.google.com
dns — MX 5 alt1.aspmx.l.google.com

Everything else

HTTP/3miscellaneous

header — alt-svc: h3=":443"; ma=86400

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