ip2asn

# https://github.com/hadiasghari/pyasn
# pyasn_util_download.py --latest
# pyasn_util_convert.py --single <Downloaded RIB File> <ipasn_db_file_name>

# load database
asndb = pyasn.pyasn('ipasn.dat')

# convert one ip to asn
def pyasn(ip,asndb):
    asn, prefix  = asndb.lookup(ip)
    dic = {
        "ip": ip,
        "asn": asn,
    }
    return (dic)
    
# MAIN
array_df = []
for ip in df.ip.unique().tolist():
    if (ip=="0"): # do it better, you can :)
        continue
    array_df.append(pyasn(ip, asndb))
    
df_asn = pd.DataFrame(array_df)
df_asn.head()