/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/NetAddr/IP/Util/autosplit.ix is in libnetaddr-ip-perl 4.075+dfsg-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Index created by AutoSplit for ../../blib/lib/NetAddr/IP/Util.pm
# (file acts as timestamp)
1;
|