/usr/share/kamailio/db_berkeley/kamailio/address is in kamailio-berkeley-modules 4.0.4-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | METADATA_COLUMNS
id(int) grp(int) ip_addr(str) mask(int) port(int) tag(str)
METADATA_KEY
1
METADATA_READONLY
0
METADATA_LOGFLAGS
0
METADATA_DEFAULTS
NIL|1|NIL|32|0|NIL
|