LA locals, because they are available as DNS anywhere in the western half of the country are both spotbeam and CONUS.
MPEG2 HD versions are CONUS and those are what is being converted to MPEG4, again CONUS. This is only the "big 4" and available for DNS. These are the ones in the 80's.
MPEG4 HD locals are on spotbeam only to the LA area. This may include more then just the big 4. These are the same channel number as the OTA channel number.