Thanks for the reply.
Among all NA STLs I heard only KLDE on 25910 kHz and sometimes traces on 25990 kHz, no other signals were being observed here so far.
Also WWV was heard on 25000 kHz at the end of past year.
As for LA DX, I have never heard anything from Latin America there yet. However, thanks for the tip, I shall be checking the frequency list from time to time.