oneliner to retrieve AS Numbers of a company

oasn.sh

(ls /tmp/GeoLite2-ASN-CSV.zip||wget --quiet -P /tmp "https://geolite.maxmind.com/download/geoip/database/GeoLite2-ASN-CSV.zip") 2>&1|grep X; unzip -c /tmp/GeoLite2-ASN-CSV.zip|grep -i airbnb|cut -d ',' -f 2|sort -fu

amass intel -org paypal | cut -d ',' -f 1

output:
 
133850
137437
206695
206704
394941
395762
54229

function oasn {
  # asn
  grep -i $1 /home/gwen/Security/tools/Discovery/Ip/asnlookup/GeoLite2-ASN-Blocks-IPv4.csv | cut -d "," -f 2 | sort -fu
}
function oasnr {
  # ip ranges
  grep -i $1 /home/gwen/Security/tools/Discovery/Ip/asnlookup/GeoLite2-ASN-Blocks-IPv4.csv | cut -d "," -f 1 | sort -fu
}


ALTERNATIVES:

@_harleo
github.com/harleo/asnip

@dustyfresh
amass intel -org airbnb | cut -d \, -f1 | while read asn; do whois -h http://whois.radb.net -- "-i origin AS$asn" | grep 'route:'; done | awk {'print $2'} | xargs masscan -p 80,443,20-25,3389