"A standard amateur callsign consists of a one- or two-character prefix, 
at least one of which must be a letter, followed by a digit and a suffix 
of one to three letters."

Worldwide radio callsign allocations are defined by ITU RR list.  Hamradio 
follows that with few exotic exceptions.

Even ITU made 2 special cases with 3D Swaziland/Fiji and SS Egypt/Sudan 
fortunately not used so far!

I used ITU and DXCC lists for simple callsigns decoding in 1980’s covering most 
of the special cases occurring since.

I fail to understand how K1JT squeezed 3DA0AY in 17 bits while 3XY4D fails?  
Prefix and suffix formats are the same!

I thoroughly enjoy FT8 since July 18.  1K+ QSO made on 5 bands, 165 DXCC 
logged.  K1JT caught on 40 m!

73 de Mario, S56A, N1YU

P. S.  GL with Fox & Hounds 😊  Big mess expected with 3Y and KH1..  I left 
Baker island in 2002. 

Sent from Mail for Windows 10

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