Azure table storage names - invalid charaters -

i have following table names in azure table storage. table names generated automatically in application , created using table.createifnotexists(tablename). work , don't. when dig error extended error information tells me resource name contains invalid characters - @ loss work out invalid in failing names - can spot this?

8836461cc98249bea59dc5f6790d40edstk365developmentusers 

– specified resource name contains invalid characters

8836461cc98249bea59dc5f6790d40edstk365developmenttasks 

– specified resource name contains invalid characters

af0589646af645b98f749d92a5b2ee25stk365developmentusers 

– works

table names cannot start number. first example, starting 8, isn't valid.

table names limited 63 characters. haven't shown how you're generating names, limitation you're running into.

full rule details here.