Source ASN DB missing data

[Xorlent]

Doing QC on the source TSV file, I found it's missing quite a few IP ranges. I recommend utilizing a different source. The ip2location lite ASN DB appears to be complete, updated monthly:
https://lite.ip2location.com/database-asn

Here is a modified version of the shell script if you decide to adopt it. One benefit is there would no longer be a need for ipcalc. The download would be similar (sign-up and token required), using unzip instead of gzip. There are licensing restrictions/attribution to consider if deciding to use ip2location.

Process ASN.txt and output asn-preprocess.txt (IPv4 only)

cat ~/ASN.txt | grep -v '^#' | awk '{print $1}' | grep '^AS' | while read asn; do
echo "Processing $asn"
awk -F "","" '{if($4 == '${asn:2}') print $3}' ~/IP2LOCATION-LITE-ASN.CSV >> ~/asn-preprocess.txt
done

Make sure all addresses are valid and properly formatted, outputting ipv4.txt

perl cleanup.pl ~/asn-preprocess.txt | grep -E '/(2[0-4]|1[0-9]|[0-9])$' > ~/ipv4.txt

[splitice]

Please submit a PR with your proposed automation changes

[splitice]

I don't see any licence issues as long as we don't plan on redistributing the licence. There would however need to be a PR supporting this and a comparison.