Get in touch

Bugs, questions about where the data comes from, press, or work — all welcome, and all read by one person.

What helps

Which aircraft

A callsign or registration — UAL482, N172SP.

When

Roughly. Within an hour is close enough to find it.

What looked wrong

What you saw, and what you expected instead.

Some gaps are known and expected rather than defects — aircraft without ADS-B out, or altitude that reads below the field on a high-pressure day. What Alarium can and cannot see covers them.