/usr/share/m17n/TIS-620.map is in m17n-db 1.6.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # Generated from /usr/share/i18n/charmaps/TIS-620.gz
0x0000-0x007F 0x0000
0x00A1-0x00DA 0x0E01
0x00DF-0x00FB 0x0E3F
|