'0': 0.0.0.0
'1': 128.0.0.0
'2': 192.0.0.0
'3': 224.0.0.0
'4': 240.0.0.0
'5': 248.0.0.0
'6': 252.0.0.0
'7': 254.0.0.0
'8': 255.0.0.0
'9': 255.128.0.0
'10': 255.192.0.0
'11': 255.224.0.0
'12': 255.240.0.0
'13': 255.248.0.0
'14': 255.252.0.0
'15': 255.254.0.0
'16': 255.255.0.0
'17': 255.255.128.0
'18': 255.255.192.0
'19': 255.255.224.0
'20': 255.255.240.0
'21': 255.255.248.0
'22': 255.255.252.0
'23': 255.255.254.0
'24': 255.255.255.0
'25': 255.255.255.128
'26': 255.255.255.192
'27': 255.255.255.224
'28': 255.255.255.240
'29': 255.255.255.248
'30': 255.255.255.252
'31': 255.255.255.254
'32': 255.255.255.255