azure_storage_cnames.py

#!/usr/bin/python2
import subprocess, re
import sys
from collections import Counter

urls = []

with open('hosts.txt', 'r') as f:
	for line in f:
		urls.append('%s.blob.core.windows.net' % line.strip())

cnames = []
for url in urls:
    process = subprocess.Popen(["nslookup", url], stdout=subprocess.PIPE)
    out = process.communicate()[0].split('\n')
    for row in out:
        if 'Name' in row:
            fqdn = re.sub('\s+(?!$)','',row.replace('Name:',''))
            print url + ' : ' + fqdn
            cnames.append(fqdn)
            
c = Counter(cnames)
print '\nNon-unique Storage Stamps\n==========='
for k, v in c.iteritems():
    if (v > 1):
        print k + ' was found %s times' % v