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
203.153.187.1 0:0:0:0:0:ffff:cb99:bb01
203.153.187.2 0:0:0:0:0:ffff:cb99:bb02
203.153.187.3 0:0:0:0:0:ffff:cb99:bb03
203.153.187.4 0:0:0:0:0:ffff:cb99:bb04
203.153.187.5 0:0:0:0:0:ffff:cb99:bb05
203.153.187.6 0:0:0:0:0:ffff:cb99:bb06
203.153.187.7 0:0:0:0:0:ffff:cb99:bb07
203.153.187.8 0:0:0:0:0:ffff:cb99:bb08
203.153.187.9 0:0:0:0:0:ffff:cb99:bb09
203.153.187.10 0:0:0:0:0:ffff:cb99:bb0a
203.153.187.11 0:0:0:0:0:ffff:cb99:bb0b
203.153.187.12 0:0:0:0:0:ffff:cb99:bb0c
203.153.187.13 0:0:0:0:0:ffff:cb99:bb0d
203.153.187.14 0:0:0:0:0:ffff:cb99:bb0e
203.153.187.15 0:0:0:0:0:ffff:cb99:bb0f
203.153.187.16 0:0:0:0:0:ffff:cb99:bb10
203.153.187.17 0:0:0:0:0:ffff:cb99:bb11
203.153.187.18 0:0:0:0:0:ffff:cb99:bb12
203.153.187.19 0:0:0:0:0:ffff:cb99:bb13
203.153.187.20 0:0:0:0:0:ffff:cb99:bb14
203.153.187.21 0:0:0:0:0:ffff:cb99:bb15
203.153.187.22 0:0:0:0:0:ffff:cb99:bb16
203.153.187.23 0:0:0:0:0:ffff:cb99:bb17
203.153.187.24 0:0:0:0:0:ffff:cb99:bb18
203.153.187.25 0:0:0:0:0:ffff:cb99:bb19
203.153.187.26 0:0:0:0:0:ffff:cb99:bb1a
203.153.187.27 0:0:0:0:0:ffff:cb99:bb1b
203.153.187.28 0:0:0:0:0:ffff:cb99:bb1c
203.153.187.29 0:0:0:0:0:ffff:cb99:bb1d
203.153.187.30 0:0:0:0:0:ffff:cb99:bb1e
203.153.187.31 0:0:0:0:0:ffff:cb99:bb1f
203.153.187.32 0:0:0:0:0:ffff:cb99:bb20
203.153.187.33 0:0:0:0:0:ffff:cb99:bb21
203.153.187.34 0:0:0:0:0:ffff:cb99:bb22
203.153.187.35 0:0:0:0:0:ffff:cb99:bb23
203.153.187.36 0:0:0:0:0:ffff:cb99:bb24
203.153.187.37 0:0:0:0:0:ffff:cb99:bb25
203.153.187.38 0:0:0:0:0:ffff:cb99:bb26
203.153.187.39 0:0:0:0:0:ffff:cb99:bb27
203.153.187.40 0:0:0:0:0:ffff:cb99:bb28
203.153.187.41 0:0:0:0:0:ffff:cb99:bb29
203.153.187.42 0:0:0:0:0:ffff:cb99:bb2a
203.153.187.43 0:0:0:0:0:ffff:cb99:bb2b
203.153.187.44 0:0:0:0:0:ffff:cb99:bb2c
203.153.187.45 0:0:0:0:0:ffff:cb99:bb2d
203.153.187.46 0:0:0:0:0:ffff:cb99:bb2e
203.153.187.47 0:0:0:0:0:ffff:cb99:bb2f
203.153.187.48 0:0:0:0:0:ffff:cb99:bb30
203.153.187.49 0:0:0:0:0:ffff:cb99:bb31
203.153.187.50 0:0:0:0:0:ffff:cb99:bb32
203.153.187.51 0:0:0:0:0:ffff:cb99:bb33
203.153.187.52 0:0:0:0:0:ffff:cb99:bb34
203.153.187.53 0:0:0:0:0:ffff:cb99:bb35
203.153.187.54 0:0:0:0:0:ffff:cb99:bb36
203.153.187.55 0:0:0:0:0:ffff:cb99:bb37
203.153.187.56 0:0:0:0:0:ffff:cb99:bb38
203.153.187.57 0:0:0:0:0:ffff:cb99:bb39
203.153.187.58 0:0:0:0:0:ffff:cb99:bb3a
203.153.187.59 0:0:0:0:0:ffff:cb99:bb3b
203.153.187.60 0:0:0:0:0:ffff:cb99:bb3c


203.153.187.61 0:0:0:0:0:ffff:cb99:bb3d
203.153.187.62 0:0:0:0:0:ffff:cb99:bb3e
203.153.187.63 0:0:0:0:0:ffff:cb99:bb3f
203.153.187.64 0:0:0:0:0:ffff:cb99:bb40
203.153.187.65 0:0:0:0:0:ffff:cb99:bb41
203.153.187.66 0:0:0:0:0:ffff:cb99:bb42
203.153.187.67 0:0:0:0:0:ffff:cb99:bb43
203.153.187.68 0:0:0:0:0:ffff:cb99:bb44
203.153.187.69 0:0:0:0:0:ffff:cb99:bb45
203.153.187.70 0:0:0:0:0:ffff:cb99:bb46
203.153.187.71 0:0:0:0:0:ffff:cb99:bb47
203.153.187.72 0:0:0:0:0:ffff:cb99:bb48
203.153.187.73 0:0:0:0:0:ffff:cb99:bb49
203.153.187.74 0:0:0:0:0:ffff:cb99:bb4a
203.153.187.75 0:0:0:0:0:ffff:cb99:bb4b
203.153.187.76 0:0:0:0:0:ffff:cb99:bb4c
203.153.187.77 0:0:0:0:0:ffff:cb99:bb4d
203.153.187.78 0:0:0:0:0:ffff:cb99:bb4e
203.153.187.79 0:0:0:0:0:ffff:cb99:bb4f
203.153.187.80 0:0:0:0:0:ffff:cb99:bb50
203.153.187.81 0:0:0:0:0:ffff:cb99:bb51
203.153.187.82 0:0:0:0:0:ffff:cb99:bb52
203.153.187.83 0:0:0:0:0:ffff:cb99:bb53
203.153.187.84 0:0:0:0:0:ffff:cb99:bb54
203.153.187.85 0:0:0:0:0:ffff:cb99:bb55
203.153.187.86 0:0:0:0:0:ffff:cb99:bb56
203.153.187.87 0:0:0:0:0:ffff:cb99:bb57
203.153.187.88 0:0:0:0:0:ffff:cb99:bb58
203.153.187.89 0:0:0:0:0:ffff:cb99:bb59
203.153.187.90 0:0:0:0:0:ffff:cb99:bb5a
203.153.187.91 0:0:0:0:0:ffff:cb99:bb5b
203.153.187.92 0:0:0:0:0:ffff:cb99:bb5c
203.153.187.93 0:0:0:0:0:ffff:cb99:bb5d
203.153.187.94 0:0:0:0:0:ffff:cb99:bb5e
203.153.187.95 0:0:0:0:0:ffff:cb99:bb5f
203.153.187.96 0:0:0:0:0:ffff:cb99:bb60
203.153.187.97 0:0:0:0:0:ffff:cb99:bb61
203.153.187.98 0:0:0:0:0:ffff:cb99:bb62
203.153.187.99 0:0:0:0:0:ffff:cb99:bb63
203.153.187.100 0:0:0:0:0:ffff:cb99:bb64
203.153.187.101 0:0:0:0:0:ffff:cb99:bb65
203.153.187.102 0:0:0:0:0:ffff:cb99:bb66
203.153.187.103 0:0:0:0:0:ffff:cb99:bb67
203.153.187.104 0:0:0:0:0:ffff:cb99:bb68
203.153.187.105 0:0:0:0:0:ffff:cb99:bb69
203.153.187.106 0:0:0:0:0:ffff:cb99:bb6a
203.153.187.107 0:0:0:0:0:ffff:cb99:bb6b
203.153.187.108 0:0:0:0:0:ffff:cb99:bb6c
203.153.187.109 0:0:0:0:0:ffff:cb99:bb6d
203.153.187.110 0:0:0:0:0:ffff:cb99:bb6e
203.153.187.111 0:0:0:0:0:ffff:cb99:bb6f
203.153.187.112 0:0:0:0:0:ffff:cb99:bb70
203.153.187.113 0:0:0:0:0:ffff:cb99:bb71
203.153.187.114 0:0:0:0:0:ffff:cb99:bb72
203.153.187.115 0:0:0:0:0:ffff:cb99:bb73
203.153.187.116 0:0:0:0:0:ffff:cb99:bb74
203.153.187.117 0:0:0:0:0:ffff:cb99:bb75
203.153.187.118 0:0:0:0:0:ffff:cb99:bb76
203.153.187.119 0:0:0:0:0:ffff:cb99:bb77
203.153.187.120 0:0:0:0:0:ffff:cb99:bb78


203.153.187.121 0:0:0:0:0:ffff:cb99:bb79
203.153.187.122 0:0:0:0:0:ffff:cb99:bb7a
203.153.187.123 0:0:0:0:0:ffff:cb99:bb7b
203.153.187.124 0:0:0:0:0:ffff:cb99:bb7c
203.153.187.125 0:0:0:0:0:ffff:cb99:bb7d
203.153.187.126 0:0:0:0:0:ffff:cb99:bb7e
203.153.187.127 0:0:0:0:0:ffff:cb99:bb7f
203.153.187.128 0:0:0:0:0:ffff:cb99:bb80
203.153.187.129 0:0:0:0:0:ffff:cb99:bb81
203.153.187.130 0:0:0:0:0:ffff:cb99:bb82
203.153.187.131 0:0:0:0:0:ffff:cb99:bb83
203.153.187.132 0:0:0:0:0:ffff:cb99:bb84
203.153.187.133 0:0:0:0:0:ffff:cb99:bb85
203.153.187.134 0:0:0:0:0:ffff:cb99:bb86
203.153.187.135 0:0:0:0:0:ffff:cb99:bb87
203.153.187.136 0:0:0:0:0:ffff:cb99:bb88
203.153.187.137 0:0:0:0:0:ffff:cb99:bb89
203.153.187.138 0:0:0:0:0:ffff:cb99:bb8a
203.153.187.139 0:0:0:0:0:ffff:cb99:bb8b
203.153.187.140 0:0:0:0:0:ffff:cb99:bb8c
203.153.187.141 0:0:0:0:0:ffff:cb99:bb8d
203.153.187.142 0:0:0:0:0:ffff:cb99:bb8e
203.153.187.143 0:0:0:0:0:ffff:cb99:bb8f
203.153.187.144 0:0:0:0:0:ffff:cb99:bb90
203.153.187.145 0:0:0:0:0:ffff:cb99:bb91
203.153.187.146 0:0:0:0:0:ffff:cb99:bb92
203.153.187.147 0:0:0:0:0:ffff:cb99:bb93
203.153.187.148 0:0:0:0:0:ffff:cb99:bb94
203.153.187.149 0:0:0:0:0:ffff:cb99:bb95
203.153.187.150 0:0:0:0:0:ffff:cb99:bb96
203.153.187.151 0:0:0:0:0:ffff:cb99:bb97
203.153.187.152 0:0:0:0:0:ffff:cb99:bb98
203.153.187.153 0:0:0:0:0:ffff:cb99:bb99
203.153.187.154 0:0:0:0:0:ffff:cb99:bb9a
203.153.187.155 0:0:0:0:0:ffff:cb99:bb9b
203.153.187.156 0:0:0:0:0:ffff:cb99:bb9c
203.153.187.157 0:0:0:0:0:ffff:cb99:bb9d
203.153.187.158 0:0:0:0:0:ffff:cb99:bb9e
203.153.187.159 0:0:0:0:0:ffff:cb99:bb9f
203.153.187.160 0:0:0:0:0:ffff:cb99:bba0
203.153.187.161 0:0:0:0:0:ffff:cb99:bba1
203.153.187.162 0:0:0:0:0:ffff:cb99:bba2
203.153.187.163 0:0:0:0:0:ffff:cb99:bba3
203.153.187.164 0:0:0:0:0:ffff:cb99:bba4
203.153.187.165 0:0:0:0:0:ffff:cb99:bba5
203.153.187.166 0:0:0:0:0:ffff:cb99:bba6
203.153.187.167 0:0:0:0:0:ffff:cb99:bba7
203.153.187.168 0:0:0:0:0:ffff:cb99:bba8
203.153.187.169 0:0:0:0:0:ffff:cb99:bba9
203.153.187.170 0:0:0:0:0:ffff:cb99:bbaa
203.153.187.171 0:0:0:0:0:ffff:cb99:bbab
203.153.187.172 0:0:0:0:0:ffff:cb99:bbac
203.153.187.173 0:0:0:0:0:ffff:cb99:bbad
203.153.187.174 0:0:0:0:0:ffff:cb99:bbae
203.153.187.175 0:0:0:0:0:ffff:cb99:bbaf
203.153.187.176 0:0:0:0:0:ffff:cb99:bbb0
203.153.187.177 0:0:0:0:0:ffff:cb99:bbb1
203.153.187.178 0:0:0:0:0:ffff:cb99:bbb2
203.153.187.179 0:0:0:0:0:ffff:cb99:bbb3
203.153.187.180 0:0:0:0:0:ffff:cb99:bbb4


203.153.187.181 0:0:0:0:0:ffff:cb99:bbb5
203.153.187.182 0:0:0:0:0:ffff:cb99:bbb6
203.153.187.183 0:0:0:0:0:ffff:cb99:bbb7
203.153.187.184 0:0:0:0:0:ffff:cb99:bbb8
203.153.187.185 0:0:0:0:0:ffff:cb99:bbb9
203.153.187.186 0:0:0:0:0:ffff:cb99:bbba
203.153.187.187 0:0:0:0:0:ffff:cb99:bbbb
203.153.187.188 0:0:0:0:0:ffff:cb99:bbbc
203.153.187.189 0:0:0:0:0:ffff:cb99:bbbd
203.153.187.190 0:0:0:0:0:ffff:cb99:bbbe
203.153.187.191 0:0:0:0:0:ffff:cb99:bbbf
203.153.187.192 0:0:0:0:0:ffff:cb99:bbc0
203.153.187.193 0:0:0:0:0:ffff:cb99:bbc1
203.153.187.194 0:0:0:0:0:ffff:cb99:bbc2
203.153.187.195 0:0:0:0:0:ffff:cb99:bbc3
203.153.187.196 0:0:0:0:0:ffff:cb99:bbc4
203.153.187.197 0:0:0:0:0:ffff:cb99:bbc5
203.153.187.198 0:0:0:0:0:ffff:cb99:bbc6
203.153.187.199 0:0:0:0:0:ffff:cb99:bbc7
203.153.187.200 0:0:0:0:0:ffff:cb99:bbc8
203.153.187.201 0:0:0:0:0:ffff:cb99:bbc9
203.153.187.202 0:0:0:0:0:ffff:cb99:bbca
203.153.187.203 0:0:0:0:0:ffff:cb99:bbcb
203.153.187.204 0:0:0:0:0:ffff:cb99:bbcc
203.153.187.205 0:0:0:0:0:ffff:cb99:bbcd
203.153.187.206 0:0:0:0:0:ffff:cb99:bbce
203.153.187.207 0:0:0:0:0:ffff:cb99:bbcf
203.153.187.208 0:0:0:0:0:ffff:cb99:bbd0
203.153.187.209 0:0:0:0:0:ffff:cb99:bbd1
203.153.187.210 0:0:0:0:0:ffff:cb99:bbd2
203.153.187.211 0:0:0:0:0:ffff:cb99:bbd3
203.153.187.212 0:0:0:0:0:ffff:cb99:bbd4
203.153.187.213 0:0:0:0:0:ffff:cb99:bbd5
203.153.187.214 0:0:0:0:0:ffff:cb99:bbd6
203.153.187.215 0:0:0:0:0:ffff:cb99:bbd7
203.153.187.216 0:0:0:0:0:ffff:cb99:bbd8
203.153.187.217 0:0:0:0:0:ffff:cb99:bbd9
203.153.187.218 0:0:0:0:0:ffff:cb99:bbda
203.153.187.219 0:0:0:0:0:ffff:cb99:bbdb
203.153.187.220 0:0:0:0:0:ffff:cb99:bbdc
203.153.187.221 0:0:0:0:0:ffff:cb99:bbdd
203.153.187.222 0:0:0:0:0:ffff:cb99:bbde
203.153.187.223 0:0:0:0:0:ffff:cb99:bbdf
203.153.187.224 0:0:0:0:0:ffff:cb99:bbe0
203.153.187.225 0:0:0:0:0:ffff:cb99:bbe1
203.153.187.226 0:0:0:0:0:ffff:cb99:bbe2
203.153.187.227 0:0:0:0:0:ffff:cb99:bbe3
203.153.187.228 0:0:0:0:0:ffff:cb99:bbe4
203.153.187.229 0:0:0:0:0:ffff:cb99:bbe5
203.153.187.230 0:0:0:0:0:ffff:cb99:bbe6
203.153.187.231 0:0:0:0:0:ffff:cb99:bbe7
203.153.187.232 0:0:0:0:0:ffff:cb99:bbe8
203.153.187.233 0:0:0:0:0:ffff:cb99:bbe9
203.153.187.234 0:0:0:0:0:ffff:cb99:bbea
203.153.187.235 0:0:0:0:0:ffff:cb99:bbeb
203.153.187.236 0:0:0:0:0:ffff:cb99:bbec
203.153.187.237 0:0:0:0:0:ffff:cb99:bbed
203.153.187.238 0:0:0:0:0:ffff:cb99:bbee
203.153.187.239 0:0:0:0:0:ffff:cb99:bbef
203.153.187.240 0:0:0:0:0:ffff:cb99:bbf0
203.153.187.241 0:0:0:0:0:ffff:cb99:bbf1
203.153.187.242 0:0:0:0:0:ffff:cb99:bbf2
203.153.187.243 0:0:0:0:0:ffff:cb99:bbf3
203.153.187.244 0:0:0:0:0:ffff:cb99:bbf4
203.153.187.245 0:0:0:0:0:ffff:cb99:bbf5
203.153.187.246 0:0:0:0:0:ffff:cb99:bbf6
203.153.187.247 0:0:0:0:0:ffff:cb99:bbf7
203.153.187.248 0:0:0:0:0:ffff:cb99:bbf8
203.153.187.249 0:0:0:0:0:ffff:cb99:bbf9
203.153.187.250 0:0:0:0:0:ffff:cb99:bbfa
203.153.187.251 0:0:0:0:0:ffff:cb99:bbfb
203.153.187.252 0:0:0:0:0:ffff:cb99:bbfc
203.153.187.253 0:0:0:0:0:ffff:cb99:bbfd
203.153.187.254 0:0:0:0:0:ffff:cb99:bbfe
203.153.187.255 0:0:0:0:0:ffff:cb99:bbff


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.