Hi.
Cut numbers that are the norm now are 5nn and T's for leading zeros.
However, I don't like the use of others, probably because I am not accustomed to them. The one that did really throw me was in CQWW when a USA station sent me 599 5 but it was in reality ENN E . I had to work it out!
Regards from Roger, G3LDI
Swardeston, Norfolk.