Not getting Alerts tracking TRS1181

Not getting Alerts tracking TRS1181. Have airport code as KDCA and KRSW

Use TRS1181 as the Flight or Tail Number instead of N1181.

Did you only type in 1181 and we assumed it was a registration?

now tracking TRS 1153 still no alerts for departure

yes just typed 1181

Did it depart before you changed the alert?

I suspect it did, 42 minutes in the air and 23 minutes since my last post.