Find IP IPv4 Network/Subnet and its host address ranges

What is an IPv4 IP address its network and host address ranges?

An IPv4 IP address is an address used in order to uniquely identify a device on an IP network. The address is made up of 32 binary bits, which can be divisible into a network portion and host portion with the help of a subnet mask. The 32 binary bits are broken into four octets (1 octet = 8 bits). Each octet is converted to decimal and separated by a period (dot).

How to Subnet IPv4? Its simple answer is that subnetting is the process of taking a network and splitting it into smaller networks, known as subnets. It's used to free up more public IPv4 addresses and segment networks for security and easier management.
Following are the ranges of IPv4 subnet/network address and their host addresses.

IPv4 AddressIPv6 Address
40.168.203.1 0:0:0:0:0:ffff:28a8:cb01
40.168.203.2 0:0:0:0:0:ffff:28a8:cb02
40.168.203.3 0:0:0:0:0:ffff:28a8:cb03
40.168.203.4 0:0:0:0:0:ffff:28a8:cb04
40.168.203.5 0:0:0:0:0:ffff:28a8:cb05
40.168.203.6 0:0:0:0:0:ffff:28a8:cb06
40.168.203.7 0:0:0:0:0:ffff:28a8:cb07
40.168.203.8 0:0:0:0:0:ffff:28a8:cb08
40.168.203.9 0:0:0:0:0:ffff:28a8:cb09
40.168.203.10 0:0:0:0:0:ffff:28a8:cb0a
40.168.203.11 0:0:0:0:0:ffff:28a8:cb0b
40.168.203.12 0:0:0:0:0:ffff:28a8:cb0c
40.168.203.13 0:0:0:0:0:ffff:28a8:cb0d
40.168.203.14 0:0:0:0:0:ffff:28a8:cb0e
40.168.203.15 0:0:0:0:0:ffff:28a8:cb0f
40.168.203.16 0:0:0:0:0:ffff:28a8:cb10
40.168.203.17 0:0:0:0:0:ffff:28a8:cb11
40.168.203.18 0:0:0:0:0:ffff:28a8:cb12
40.168.203.19 0:0:0:0:0:ffff:28a8:cb13
40.168.203.20 0:0:0:0:0:ffff:28a8:cb14
40.168.203.21 0:0:0:0:0:ffff:28a8:cb15
40.168.203.22 0:0:0:0:0:ffff:28a8:cb16
40.168.203.23 0:0:0:0:0:ffff:28a8:cb17
40.168.203.24 0:0:0:0:0:ffff:28a8:cb18
40.168.203.25 0:0:0:0:0:ffff:28a8:cb19
40.168.203.26 0:0:0:0:0:ffff:28a8:cb1a
40.168.203.27 0:0:0:0:0:ffff:28a8:cb1b
40.168.203.28 0:0:0:0:0:ffff:28a8:cb1c
40.168.203.29 0:0:0:0:0:ffff:28a8:cb1d
40.168.203.30 0:0:0:0:0:ffff:28a8:cb1e
40.168.203.31 0:0:0:0:0:ffff:28a8:cb1f
40.168.203.32 0:0:0:0:0:ffff:28a8:cb20
40.168.203.33 0:0:0:0:0:ffff:28a8:cb21
40.168.203.34 0:0:0:0:0:ffff:28a8:cb22
40.168.203.35 0:0:0:0:0:ffff:28a8:cb23
40.168.203.36 0:0:0:0:0:ffff:28a8:cb24
40.168.203.37 0:0:0:0:0:ffff:28a8:cb25
40.168.203.38 0:0:0:0:0:ffff:28a8:cb26
40.168.203.39 0:0:0:0:0:ffff:28a8:cb27
40.168.203.40 0:0:0:0:0:ffff:28a8:cb28
40.168.203.41 0:0:0:0:0:ffff:28a8:cb29
40.168.203.42 0:0:0:0:0:ffff:28a8:cb2a
40.168.203.43 0:0:0:0:0:ffff:28a8:cb2b
40.168.203.44 0:0:0:0:0:ffff:28a8:cb2c
40.168.203.45 0:0:0:0:0:ffff:28a8:cb2d
40.168.203.46 0:0:0:0:0:ffff:28a8:cb2e
40.168.203.47 0:0:0:0:0:ffff:28a8:cb2f
40.168.203.48 0:0:0:0:0:ffff:28a8:cb30
40.168.203.49 0:0:0:0:0:ffff:28a8:cb31
40.168.203.50 0:0:0:0:0:ffff:28a8:cb32
40.168.203.51 0:0:0:0:0:ffff:28a8:cb33
40.168.203.52 0:0:0:0:0:ffff:28a8:cb34
40.168.203.53 0:0:0:0:0:ffff:28a8:cb35
40.168.203.54 0:0:0:0:0:ffff:28a8:cb36
40.168.203.55 0:0:0:0:0:ffff:28a8:cb37
40.168.203.56 0:0:0:0:0:ffff:28a8:cb38
40.168.203.57 0:0:0:0:0:ffff:28a8:cb39
40.168.203.58 0:0:0:0:0:ffff:28a8:cb3a
40.168.203.59 0:0:0:0:0:ffff:28a8:cb3b
40.168.203.60 0:0:0:0:0:ffff:28a8:cb3c


40.168.203.61 0:0:0:0:0:ffff:28a8:cb3d
40.168.203.62 0:0:0:0:0:ffff:28a8:cb3e
40.168.203.63 0:0:0:0:0:ffff:28a8:cb3f
40.168.203.64 0:0:0:0:0:ffff:28a8:cb40
40.168.203.65 0:0:0:0:0:ffff:28a8:cb41
40.168.203.66 0:0:0:0:0:ffff:28a8:cb42
40.168.203.67 0:0:0:0:0:ffff:28a8:cb43
40.168.203.68 0:0:0:0:0:ffff:28a8:cb44
40.168.203.69 0:0:0:0:0:ffff:28a8:cb45
40.168.203.70 0:0:0:0:0:ffff:28a8:cb46
40.168.203.71 0:0:0:0:0:ffff:28a8:cb47
40.168.203.72 0:0:0:0:0:ffff:28a8:cb48
40.168.203.73 0:0:0:0:0:ffff:28a8:cb49
40.168.203.74 0:0:0:0:0:ffff:28a8:cb4a
40.168.203.75 0:0:0:0:0:ffff:28a8:cb4b
40.168.203.76 0:0:0:0:0:ffff:28a8:cb4c
40.168.203.77 0:0:0:0:0:ffff:28a8:cb4d
40.168.203.78 0:0:0:0:0:ffff:28a8:cb4e
40.168.203.79 0:0:0:0:0:ffff:28a8:cb4f
40.168.203.80 0:0:0:0:0:ffff:28a8:cb50
40.168.203.81 0:0:0:0:0:ffff:28a8:cb51
40.168.203.82 0:0:0:0:0:ffff:28a8:cb52
40.168.203.83 0:0:0:0:0:ffff:28a8:cb53
40.168.203.84 0:0:0:0:0:ffff:28a8:cb54
40.168.203.85 0:0:0:0:0:ffff:28a8:cb55
40.168.203.86 0:0:0:0:0:ffff:28a8:cb56
40.168.203.87 0:0:0:0:0:ffff:28a8:cb57
40.168.203.88 0:0:0:0:0:ffff:28a8:cb58
40.168.203.89 0:0:0:0:0:ffff:28a8:cb59
40.168.203.90 0:0:0:0:0:ffff:28a8:cb5a
40.168.203.91 0:0:0:0:0:ffff:28a8:cb5b
40.168.203.92 0:0:0:0:0:ffff:28a8:cb5c
40.168.203.93 0:0:0:0:0:ffff:28a8:cb5d
40.168.203.94 0:0:0:0:0:ffff:28a8:cb5e
40.168.203.95 0:0:0:0:0:ffff:28a8:cb5f
40.168.203.96 0:0:0:0:0:ffff:28a8:cb60
40.168.203.97 0:0:0:0:0:ffff:28a8:cb61
40.168.203.98 0:0:0:0:0:ffff:28a8:cb62
40.168.203.99 0:0:0:0:0:ffff:28a8:cb63
40.168.203.100 0:0:0:0:0:ffff:28a8:cb64
40.168.203.101 0:0:0:0:0:ffff:28a8:cb65
40.168.203.102 0:0:0:0:0:ffff:28a8:cb66
40.168.203.103 0:0:0:0:0:ffff:28a8:cb67
40.168.203.104 0:0:0:0:0:ffff:28a8:cb68
40.168.203.105 0:0:0:0:0:ffff:28a8:cb69
40.168.203.106 0:0:0:0:0:ffff:28a8:cb6a
40.168.203.107 0:0:0:0:0:ffff:28a8:cb6b
40.168.203.108 0:0:0:0:0:ffff:28a8:cb6c
40.168.203.109 0:0:0:0:0:ffff:28a8:cb6d
40.168.203.110 0:0:0:0:0:ffff:28a8:cb6e
40.168.203.111 0:0:0:0:0:ffff:28a8:cb6f
40.168.203.112 0:0:0:0:0:ffff:28a8:cb70
40.168.203.113 0:0:0:0:0:ffff:28a8:cb71
40.168.203.114 0:0:0:0:0:ffff:28a8:cb72
40.168.203.115 0:0:0:0:0:ffff:28a8:cb73
40.168.203.116 0:0:0:0:0:ffff:28a8:cb74
40.168.203.117 0:0:0:0:0:ffff:28a8:cb75
40.168.203.118 0:0:0:0:0:ffff:28a8:cb76
40.168.203.119 0:0:0:0:0:ffff:28a8:cb77
40.168.203.120 0:0:0:0:0:ffff:28a8:cb78


40.168.203.121 0:0:0:0:0:ffff:28a8:cb79
40.168.203.122 0:0:0:0:0:ffff:28a8:cb7a
40.168.203.123 0:0:0:0:0:ffff:28a8:cb7b
40.168.203.124 0:0:0:0:0:ffff:28a8:cb7c
40.168.203.125 0:0:0:0:0:ffff:28a8:cb7d
40.168.203.126 0:0:0:0:0:ffff:28a8:cb7e
40.168.203.127 0:0:0:0:0:ffff:28a8:cb7f
40.168.203.128 0:0:0:0:0:ffff:28a8:cb80
40.168.203.129 0:0:0:0:0:ffff:28a8:cb81
40.168.203.130 0:0:0:0:0:ffff:28a8:cb82
40.168.203.131 0:0:0:0:0:ffff:28a8:cb83
40.168.203.132 0:0:0:0:0:ffff:28a8:cb84
40.168.203.133 0:0:0:0:0:ffff:28a8:cb85
40.168.203.134 0:0:0:0:0:ffff:28a8:cb86
40.168.203.135 0:0:0:0:0:ffff:28a8:cb87
40.168.203.136 0:0:0:0:0:ffff:28a8:cb88
40.168.203.137 0:0:0:0:0:ffff:28a8:cb89
40.168.203.138 0:0:0:0:0:ffff:28a8:cb8a
40.168.203.139 0:0:0:0:0:ffff:28a8:cb8b
40.168.203.140 0:0:0:0:0:ffff:28a8:cb8c
40.168.203.141 0:0:0:0:0:ffff:28a8:cb8d
40.168.203.142 0:0:0:0:0:ffff:28a8:cb8e
40.168.203.143 0:0:0:0:0:ffff:28a8:cb8f
40.168.203.144 0:0:0:0:0:ffff:28a8:cb90
40.168.203.145 0:0:0:0:0:ffff:28a8:cb91
40.168.203.146 0:0:0:0:0:ffff:28a8:cb92
40.168.203.147 0:0:0:0:0:ffff:28a8:cb93
40.168.203.148 0:0:0:0:0:ffff:28a8:cb94
40.168.203.149 0:0:0:0:0:ffff:28a8:cb95
40.168.203.150 0:0:0:0:0:ffff:28a8:cb96
40.168.203.151 0:0:0:0:0:ffff:28a8:cb97
40.168.203.152 0:0:0:0:0:ffff:28a8:cb98
40.168.203.153 0:0:0:0:0:ffff:28a8:cb99
40.168.203.154 0:0:0:0:0:ffff:28a8:cb9a
40.168.203.155 0:0:0:0:0:ffff:28a8:cb9b
40.168.203.156 0:0:0:0:0:ffff:28a8:cb9c
40.168.203.157 0:0:0:0:0:ffff:28a8:cb9d
40.168.203.158 0:0:0:0:0:ffff:28a8:cb9e
40.168.203.159 0:0:0:0:0:ffff:28a8:cb9f
40.168.203.160 0:0:0:0:0:ffff:28a8:cba0
40.168.203.161 0:0:0:0:0:ffff:28a8:cba1
40.168.203.162 0:0:0:0:0:ffff:28a8:cba2
40.168.203.163 0:0:0:0:0:ffff:28a8:cba3
40.168.203.164 0:0:0:0:0:ffff:28a8:cba4
40.168.203.165 0:0:0:0:0:ffff:28a8:cba5
40.168.203.166 0:0:0:0:0:ffff:28a8:cba6
40.168.203.167 0:0:0:0:0:ffff:28a8:cba7
40.168.203.168 0:0:0:0:0:ffff:28a8:cba8
40.168.203.169 0:0:0:0:0:ffff:28a8:cba9
40.168.203.170 0:0:0:0:0:ffff:28a8:cbaa
40.168.203.171 0:0:0:0:0:ffff:28a8:cbab
40.168.203.172 0:0:0:0:0:ffff:28a8:cbac
40.168.203.173 0:0:0:0:0:ffff:28a8:cbad
40.168.203.174 0:0:0:0:0:ffff:28a8:cbae
40.168.203.175 0:0:0:0:0:ffff:28a8:cbaf
40.168.203.176 0:0:0:0:0:ffff:28a8:cbb0
40.168.203.177 0:0:0:0:0:ffff:28a8:cbb1
40.168.203.178 0:0:0:0:0:ffff:28a8:cbb2
40.168.203.179 0:0:0:0:0:ffff:28a8:cbb3
40.168.203.180 0:0:0:0:0:ffff:28a8:cbb4


40.168.203.181 0:0:0:0:0:ffff:28a8:cbb5
40.168.203.182 0:0:0:0:0:ffff:28a8:cbb6
40.168.203.183 0:0:0:0:0:ffff:28a8:cbb7
40.168.203.184 0:0:0:0:0:ffff:28a8:cbb8
40.168.203.185 0:0:0:0:0:ffff:28a8:cbb9
40.168.203.186 0:0:0:0:0:ffff:28a8:cbba
40.168.203.187 0:0:0:0:0:ffff:28a8:cbbb
40.168.203.188 0:0:0:0:0:ffff:28a8:cbbc
40.168.203.189 0:0:0:0:0:ffff:28a8:cbbd
40.168.203.190 0:0:0:0:0:ffff:28a8:cbbe
40.168.203.191 0:0:0:0:0:ffff:28a8:cbbf
40.168.203.192 0:0:0:0:0:ffff:28a8:cbc0
40.168.203.193 0:0:0:0:0:ffff:28a8:cbc1
40.168.203.194 0:0:0:0:0:ffff:28a8:cbc2
40.168.203.195 0:0:0:0:0:ffff:28a8:cbc3
40.168.203.196 0:0:0:0:0:ffff:28a8:cbc4
40.168.203.197 0:0:0:0:0:ffff:28a8:cbc5
40.168.203.198 0:0:0:0:0:ffff:28a8:cbc6
40.168.203.199 0:0:0:0:0:ffff:28a8:cbc7
40.168.203.200 0:0:0:0:0:ffff:28a8:cbc8
40.168.203.201 0:0:0:0:0:ffff:28a8:cbc9
40.168.203.202 0:0:0:0:0:ffff:28a8:cbca
40.168.203.203 0:0:0:0:0:ffff:28a8:cbcb
40.168.203.204 0:0:0:0:0:ffff:28a8:cbcc
40.168.203.205 0:0:0:0:0:ffff:28a8:cbcd
40.168.203.206 0:0:0:0:0:ffff:28a8:cbce
40.168.203.207 0:0:0:0:0:ffff:28a8:cbcf
40.168.203.208 0:0:0:0:0:ffff:28a8:cbd0
40.168.203.209 0:0:0:0:0:ffff:28a8:cbd1
40.168.203.210 0:0:0:0:0:ffff:28a8:cbd2
40.168.203.211 0:0:0:0:0:ffff:28a8:cbd3
40.168.203.212 0:0:0:0:0:ffff:28a8:cbd4
40.168.203.213 0:0:0:0:0:ffff:28a8:cbd5
40.168.203.214 0:0:0:0:0:ffff:28a8:cbd6
40.168.203.215 0:0:0:0:0:ffff:28a8:cbd7
40.168.203.216 0:0:0:0:0:ffff:28a8:cbd8
40.168.203.217 0:0:0:0:0:ffff:28a8:cbd9
40.168.203.218 0:0:0:0:0:ffff:28a8:cbda
40.168.203.219 0:0:0:0:0:ffff:28a8:cbdb
40.168.203.220 0:0:0:0:0:ffff:28a8:cbdc
40.168.203.221 0:0:0:0:0:ffff:28a8:cbdd
40.168.203.222 0:0:0:0:0:ffff:28a8:cbde
40.168.203.223 0:0:0:0:0:ffff:28a8:cbdf
40.168.203.224 0:0:0:0:0:ffff:28a8:cbe0
40.168.203.225 0:0:0:0:0:ffff:28a8:cbe1
40.168.203.226 0:0:0:0:0:ffff:28a8:cbe2
40.168.203.227 0:0:0:0:0:ffff:28a8:cbe3
40.168.203.228 0:0:0:0:0:ffff:28a8:cbe4
40.168.203.229 0:0:0:0:0:ffff:28a8:cbe5
40.168.203.230 0:0:0:0:0:ffff:28a8:cbe6
40.168.203.231 0:0:0:0:0:ffff:28a8:cbe7
40.168.203.232 0:0:0:0:0:ffff:28a8:cbe8
40.168.203.233 0:0:0:0:0:ffff:28a8:cbe9
40.168.203.234 0:0:0:0:0:ffff:28a8:cbea
40.168.203.235 0:0:0:0:0:ffff:28a8:cbeb
40.168.203.236 0:0:0:0:0:ffff:28a8:cbec
40.168.203.237 0:0:0:0:0:ffff:28a8:cbed
40.168.203.238 0:0:0:0:0:ffff:28a8:cbee
40.168.203.239 0:0:0:0:0:ffff:28a8:cbef
40.168.203.240 0:0:0:0:0:ffff:28a8:cbf0
40.168.203.241 0:0:0:0:0:ffff:28a8:cbf1
40.168.203.242 0:0:0:0:0:ffff:28a8:cbf2
40.168.203.243 0:0:0:0:0:ffff:28a8:cbf3
40.168.203.244 0:0:0:0:0:ffff:28a8:cbf4
40.168.203.245 0:0:0:0:0:ffff:28a8:cbf5
40.168.203.246 0:0:0:0:0:ffff:28a8:cbf6
40.168.203.247 0:0:0:0:0:ffff:28a8:cbf7
40.168.203.248 0:0:0:0:0:ffff:28a8:cbf8
40.168.203.249 0:0:0:0:0:ffff:28a8:cbf9
40.168.203.250 0:0:0:0:0:ffff:28a8:cbfa
40.168.203.251 0:0:0:0:0:ffff:28a8:cbfb
40.168.203.252 0:0:0:0:0:ffff:28a8:cbfc
40.168.203.253 0:0:0:0:0:ffff:28a8:cbfd
40.168.203.254 0:0:0:0:0:ffff:28a8:cbfe
40.168.203.255 0:0:0:0:0:ffff:28a8:cbff


How we got IPv4 subnet masks?

An IPv4 subnet mask consists of 32 bits; it is a sequence of ones (1) followed by a block of zeros (0). The ones indicate bits in the address used for the network prefix and the trailing block of zeros designates that part as being the host identifier.