import socket

def all_ip(prefix):
    return ['{}.{}'.format(prefix, str(i)) for i in range (1,256)]

def resolve_me(list_of_ips):
    domains = []
    for i in list_of_ips:
        try:
            domains.append(socket.gethostbyaddr(i)[0])
        except:
            pass
    return domains

def print_all_them(domains):
    for i in domains:
        print(i)

all_prefixes = ['213.180.204', '213.180.193', '93.158.134', '87.250.250', '87.250.251', '77.88.21']

for pref in all_prefixes:
    net = all_ip(pref)
    domains = resolve_me(net)
    print_all_them(domains)