Had this report regarding 2 digit callsigns

However, when ITU held their plenipot meeting here in 1998, we were
assigned the special-event calls N98ITU and W98ITU. Those are the only
examples I know which included two numeric characters in a US amateur
callsign.


--
Keyboard In The Noise

There were never any 1X4 callsigns issued. If the first letter of the
suffix started with X, then it was an experimental station. I think
this ended in the 50s. Early TV stations in the 30s had calls like
W2XGE and so on. I always thought it was odd to have an amateur type
call attached to experimental commercial stations.

I think the 10th call area (0) started in the late 40s. If you were in
the new 10th district but had a W9 call, you received a W0 call with
the same suffic as your W9 call had.

Hope this helps,

73
George
K3UD