What is the encoding format of dns file generated by DNSCMD command

I have some Unicode Host A record names (like jmuáozg) in my DNS zone. When I use dnscmd /zoneexport <ZoneName> <Filename.dns> it creates a zone file. When I open this file in notepad or any text editor, it will show record name as jmu\303\241ozg.  I want to read this file through program, I would like to know, which type of encoding dnscmd uses while writing to a file, to represent the such ( á ) characters as \303\241.

I tried to use following encode formats

iso-8859-1
ISO-8859-15
ISO-8859-9
windows-1252
windows-1254

all are working for me, but I am not sure which one to use.

Thanks

Rahul