For brute-force searching sogou sub-domains

results.txt

['h0.cmc.bj.ie.sogou.com',
 'h0.cnc.bj.ie.sogou.com',
 'h0.crc.bj.ie.sogou.com',
 'h0.ctc.bj.ie.sogou.com',
 'h0.dxt.bj.ie.sogou.com',
 'h0.edu.bj.ie.sogou.com']

search.py

#!/usr/bin/env pypy

from socket import gethostbyname

def does_exist(domain):
    try:
        ip = gethostbyname(domain)
    except:
        return None
    return ip

import itertools
comb = itertools.product('abcdefghijklmnopqrstuvwxyz', repeat=3)

results = []

for i in comb:
    d = 'h0.' + ''.join(i) + '.bj.ie.sogou.com'
    print d,
    ip = does_exist(d)
    if ip:
        results.append(d)
        print ip
    else:
        print 'no'

from pprint import pprint
pprint(results)