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
21.15.78.1 0:0:0:0:0:ffff:150f:4e01
21.15.78.2 0:0:0:0:0:ffff:150f:4e02
21.15.78.3 0:0:0:0:0:ffff:150f:4e03
21.15.78.4 0:0:0:0:0:ffff:150f:4e04
21.15.78.5 0:0:0:0:0:ffff:150f:4e05
21.15.78.6 0:0:0:0:0:ffff:150f:4e06
21.15.78.7 0:0:0:0:0:ffff:150f:4e07
21.15.78.8 0:0:0:0:0:ffff:150f:4e08
21.15.78.9 0:0:0:0:0:ffff:150f:4e09
21.15.78.10 0:0:0:0:0:ffff:150f:4e0a
21.15.78.11 0:0:0:0:0:ffff:150f:4e0b
21.15.78.12 0:0:0:0:0:ffff:150f:4e0c
21.15.78.13 0:0:0:0:0:ffff:150f:4e0d
21.15.78.14 0:0:0:0:0:ffff:150f:4e0e
21.15.78.15 0:0:0:0:0:ffff:150f:4e0f
21.15.78.16 0:0:0:0:0:ffff:150f:4e10
21.15.78.17 0:0:0:0:0:ffff:150f:4e11
21.15.78.18 0:0:0:0:0:ffff:150f:4e12
21.15.78.19 0:0:0:0:0:ffff:150f:4e13
21.15.78.20 0:0:0:0:0:ffff:150f:4e14
21.15.78.21 0:0:0:0:0:ffff:150f:4e15
21.15.78.22 0:0:0:0:0:ffff:150f:4e16
21.15.78.23 0:0:0:0:0:ffff:150f:4e17
21.15.78.24 0:0:0:0:0:ffff:150f:4e18
21.15.78.25 0:0:0:0:0:ffff:150f:4e19
21.15.78.26 0:0:0:0:0:ffff:150f:4e1a
21.15.78.27 0:0:0:0:0:ffff:150f:4e1b
21.15.78.28 0:0:0:0:0:ffff:150f:4e1c
21.15.78.29 0:0:0:0:0:ffff:150f:4e1d
21.15.78.30 0:0:0:0:0:ffff:150f:4e1e
21.15.78.31 0:0:0:0:0:ffff:150f:4e1f
21.15.78.32 0:0:0:0:0:ffff:150f:4e20
21.15.78.33 0:0:0:0:0:ffff:150f:4e21
21.15.78.34 0:0:0:0:0:ffff:150f:4e22
21.15.78.35 0:0:0:0:0:ffff:150f:4e23
21.15.78.36 0:0:0:0:0:ffff:150f:4e24
21.15.78.37 0:0:0:0:0:ffff:150f:4e25
21.15.78.38 0:0:0:0:0:ffff:150f:4e26
21.15.78.39 0:0:0:0:0:ffff:150f:4e27
21.15.78.40 0:0:0:0:0:ffff:150f:4e28
21.15.78.41 0:0:0:0:0:ffff:150f:4e29
21.15.78.42 0:0:0:0:0:ffff:150f:4e2a
21.15.78.43 0:0:0:0:0:ffff:150f:4e2b
21.15.78.44 0:0:0:0:0:ffff:150f:4e2c
21.15.78.45 0:0:0:0:0:ffff:150f:4e2d
21.15.78.46 0:0:0:0:0:ffff:150f:4e2e
21.15.78.47 0:0:0:0:0:ffff:150f:4e2f
21.15.78.48 0:0:0:0:0:ffff:150f:4e30
21.15.78.49 0:0:0:0:0:ffff:150f:4e31
21.15.78.50 0:0:0:0:0:ffff:150f:4e32
21.15.78.51 0:0:0:0:0:ffff:150f:4e33
21.15.78.52 0:0:0:0:0:ffff:150f:4e34
21.15.78.53 0:0:0:0:0:ffff:150f:4e35
21.15.78.54 0:0:0:0:0:ffff:150f:4e36
21.15.78.55 0:0:0:0:0:ffff:150f:4e37
21.15.78.56 0:0:0:0:0:ffff:150f:4e38
21.15.78.57 0:0:0:0:0:ffff:150f:4e39
21.15.78.58 0:0:0:0:0:ffff:150f:4e3a
21.15.78.59 0:0:0:0:0:ffff:150f:4e3b
21.15.78.60 0:0:0:0:0:ffff:150f:4e3c


21.15.78.61 0:0:0:0:0:ffff:150f:4e3d
21.15.78.62 0:0:0:0:0:ffff:150f:4e3e
21.15.78.63 0:0:0:0:0:ffff:150f:4e3f
21.15.78.64 0:0:0:0:0:ffff:150f:4e40
21.15.78.65 0:0:0:0:0:ffff:150f:4e41
21.15.78.66 0:0:0:0:0:ffff:150f:4e42
21.15.78.67 0:0:0:0:0:ffff:150f:4e43
21.15.78.68 0:0:0:0:0:ffff:150f:4e44
21.15.78.69 0:0:0:0:0:ffff:150f:4e45
21.15.78.70 0:0:0:0:0:ffff:150f:4e46
21.15.78.71 0:0:0:0:0:ffff:150f:4e47
21.15.78.72 0:0:0:0:0:ffff:150f:4e48
21.15.78.73 0:0:0:0:0:ffff:150f:4e49
21.15.78.74 0:0:0:0:0:ffff:150f:4e4a
21.15.78.75 0:0:0:0:0:ffff:150f:4e4b
21.15.78.76 0:0:0:0:0:ffff:150f:4e4c
21.15.78.77 0:0:0:0:0:ffff:150f:4e4d
21.15.78.78 0:0:0:0:0:ffff:150f:4e4e
21.15.78.79 0:0:0:0:0:ffff:150f:4e4f
21.15.78.80 0:0:0:0:0:ffff:150f:4e50
21.15.78.81 0:0:0:0:0:ffff:150f:4e51
21.15.78.82 0:0:0:0:0:ffff:150f:4e52
21.15.78.83 0:0:0:0:0:ffff:150f:4e53
21.15.78.84 0:0:0:0:0:ffff:150f:4e54
21.15.78.85 0:0:0:0:0:ffff:150f:4e55
21.15.78.86 0:0:0:0:0:ffff:150f:4e56
21.15.78.87 0:0:0:0:0:ffff:150f:4e57
21.15.78.88 0:0:0:0:0:ffff:150f:4e58
21.15.78.89 0:0:0:0:0:ffff:150f:4e59
21.15.78.90 0:0:0:0:0:ffff:150f:4e5a
21.15.78.91 0:0:0:0:0:ffff:150f:4e5b
21.15.78.92 0:0:0:0:0:ffff:150f:4e5c
21.15.78.93 0:0:0:0:0:ffff:150f:4e5d
21.15.78.94 0:0:0:0:0:ffff:150f:4e5e
21.15.78.95 0:0:0:0:0:ffff:150f:4e5f
21.15.78.96 0:0:0:0:0:ffff:150f:4e60
21.15.78.97 0:0:0:0:0:ffff:150f:4e61
21.15.78.98 0:0:0:0:0:ffff:150f:4e62
21.15.78.99 0:0:0:0:0:ffff:150f:4e63
21.15.78.100 0:0:0:0:0:ffff:150f:4e64
21.15.78.101 0:0:0:0:0:ffff:150f:4e65
21.15.78.102 0:0:0:0:0:ffff:150f:4e66
21.15.78.103 0:0:0:0:0:ffff:150f:4e67
21.15.78.104 0:0:0:0:0:ffff:150f:4e68
21.15.78.105 0:0:0:0:0:ffff:150f:4e69
21.15.78.106 0:0:0:0:0:ffff:150f:4e6a
21.15.78.107 0:0:0:0:0:ffff:150f:4e6b
21.15.78.108 0:0:0:0:0:ffff:150f:4e6c
21.15.78.109 0:0:0:0:0:ffff:150f:4e6d
21.15.78.110 0:0:0:0:0:ffff:150f:4e6e
21.15.78.111 0:0:0:0:0:ffff:150f:4e6f
21.15.78.112 0:0:0:0:0:ffff:150f:4e70
21.15.78.113 0:0:0:0:0:ffff:150f:4e71
21.15.78.114 0:0:0:0:0:ffff:150f:4e72
21.15.78.115 0:0:0:0:0:ffff:150f:4e73
21.15.78.116 0:0:0:0:0:ffff:150f:4e74
21.15.78.117 0:0:0:0:0:ffff:150f:4e75
21.15.78.118 0:0:0:0:0:ffff:150f:4e76
21.15.78.119 0:0:0:0:0:ffff:150f:4e77
21.15.78.120 0:0:0:0:0:ffff:150f:4e78


21.15.78.121 0:0:0:0:0:ffff:150f:4e79
21.15.78.122 0:0:0:0:0:ffff:150f:4e7a
21.15.78.123 0:0:0:0:0:ffff:150f:4e7b
21.15.78.124 0:0:0:0:0:ffff:150f:4e7c
21.15.78.125 0:0:0:0:0:ffff:150f:4e7d
21.15.78.126 0:0:0:0:0:ffff:150f:4e7e
21.15.78.127 0:0:0:0:0:ffff:150f:4e7f
21.15.78.128 0:0:0:0:0:ffff:150f:4e80
21.15.78.129 0:0:0:0:0:ffff:150f:4e81
21.15.78.130 0:0:0:0:0:ffff:150f:4e82
21.15.78.131 0:0:0:0:0:ffff:150f:4e83
21.15.78.132 0:0:0:0:0:ffff:150f:4e84
21.15.78.133 0:0:0:0:0:ffff:150f:4e85
21.15.78.134 0:0:0:0:0:ffff:150f:4e86
21.15.78.135 0:0:0:0:0:ffff:150f:4e87
21.15.78.136 0:0:0:0:0:ffff:150f:4e88
21.15.78.137 0:0:0:0:0:ffff:150f:4e89
21.15.78.138 0:0:0:0:0:ffff:150f:4e8a
21.15.78.139 0:0:0:0:0:ffff:150f:4e8b
21.15.78.140 0:0:0:0:0:ffff:150f:4e8c
21.15.78.141 0:0:0:0:0:ffff:150f:4e8d
21.15.78.142 0:0:0:0:0:ffff:150f:4e8e
21.15.78.143 0:0:0:0:0:ffff:150f:4e8f
21.15.78.144 0:0:0:0:0:ffff:150f:4e90
21.15.78.145 0:0:0:0:0:ffff:150f:4e91
21.15.78.146 0:0:0:0:0:ffff:150f:4e92
21.15.78.147 0:0:0:0:0:ffff:150f:4e93
21.15.78.148 0:0:0:0:0:ffff:150f:4e94
21.15.78.149 0:0:0:0:0:ffff:150f:4e95
21.15.78.150 0:0:0:0:0:ffff:150f:4e96
21.15.78.151 0:0:0:0:0:ffff:150f:4e97
21.15.78.152 0:0:0:0:0:ffff:150f:4e98
21.15.78.153 0:0:0:0:0:ffff:150f:4e99
21.15.78.154 0:0:0:0:0:ffff:150f:4e9a
21.15.78.155 0:0:0:0:0:ffff:150f:4e9b
21.15.78.156 0:0:0:0:0:ffff:150f:4e9c
21.15.78.157 0:0:0:0:0:ffff:150f:4e9d
21.15.78.158 0:0:0:0:0:ffff:150f:4e9e
21.15.78.159 0:0:0:0:0:ffff:150f:4e9f
21.15.78.160 0:0:0:0:0:ffff:150f:4ea0
21.15.78.161 0:0:0:0:0:ffff:150f:4ea1
21.15.78.162 0:0:0:0:0:ffff:150f:4ea2
21.15.78.163 0:0:0:0:0:ffff:150f:4ea3
21.15.78.164 0:0:0:0:0:ffff:150f:4ea4
21.15.78.165 0:0:0:0:0:ffff:150f:4ea5
21.15.78.166 0:0:0:0:0:ffff:150f:4ea6
21.15.78.167 0:0:0:0:0:ffff:150f:4ea7
21.15.78.168 0:0:0:0:0:ffff:150f:4ea8
21.15.78.169 0:0:0:0:0:ffff:150f:4ea9
21.15.78.170 0:0:0:0:0:ffff:150f:4eaa
21.15.78.171 0:0:0:0:0:ffff:150f:4eab
21.15.78.172 0:0:0:0:0:ffff:150f:4eac
21.15.78.173 0:0:0:0:0:ffff:150f:4ead
21.15.78.174 0:0:0:0:0:ffff:150f:4eae
21.15.78.175 0:0:0:0:0:ffff:150f:4eaf
21.15.78.176 0:0:0:0:0:ffff:150f:4eb0
21.15.78.177 0:0:0:0:0:ffff:150f:4eb1
21.15.78.178 0:0:0:0:0:ffff:150f:4eb2
21.15.78.179 0:0:0:0:0:ffff:150f:4eb3
21.15.78.180 0:0:0:0:0:ffff:150f:4eb4


21.15.78.181 0:0:0:0:0:ffff:150f:4eb5
21.15.78.182 0:0:0:0:0:ffff:150f:4eb6
21.15.78.183 0:0:0:0:0:ffff:150f:4eb7
21.15.78.184 0:0:0:0:0:ffff:150f:4eb8
21.15.78.185 0:0:0:0:0:ffff:150f:4eb9
21.15.78.186 0:0:0:0:0:ffff:150f:4eba
21.15.78.187 0:0:0:0:0:ffff:150f:4ebb
21.15.78.188 0:0:0:0:0:ffff:150f:4ebc
21.15.78.189 0:0:0:0:0:ffff:150f:4ebd
21.15.78.190 0:0:0:0:0:ffff:150f:4ebe
21.15.78.191 0:0:0:0:0:ffff:150f:4ebf
21.15.78.192 0:0:0:0:0:ffff:150f:4ec0
21.15.78.193 0:0:0:0:0:ffff:150f:4ec1
21.15.78.194 0:0:0:0:0:ffff:150f:4ec2
21.15.78.195 0:0:0:0:0:ffff:150f:4ec3
21.15.78.196 0:0:0:0:0:ffff:150f:4ec4
21.15.78.197 0:0:0:0:0:ffff:150f:4ec5
21.15.78.198 0:0:0:0:0:ffff:150f:4ec6
21.15.78.199 0:0:0:0:0:ffff:150f:4ec7
21.15.78.200 0:0:0:0:0:ffff:150f:4ec8
21.15.78.201 0:0:0:0:0:ffff:150f:4ec9
21.15.78.202 0:0:0:0:0:ffff:150f:4eca
21.15.78.203 0:0:0:0:0:ffff:150f:4ecb
21.15.78.204 0:0:0:0:0:ffff:150f:4ecc
21.15.78.205 0:0:0:0:0:ffff:150f:4ecd
21.15.78.206 0:0:0:0:0:ffff:150f:4ece
21.15.78.207 0:0:0:0:0:ffff:150f:4ecf
21.15.78.208 0:0:0:0:0:ffff:150f:4ed0
21.15.78.209 0:0:0:0:0:ffff:150f:4ed1
21.15.78.210 0:0:0:0:0:ffff:150f:4ed2
21.15.78.211 0:0:0:0:0:ffff:150f:4ed3
21.15.78.212 0:0:0:0:0:ffff:150f:4ed4
21.15.78.213 0:0:0:0:0:ffff:150f:4ed5
21.15.78.214 0:0:0:0:0:ffff:150f:4ed6
21.15.78.215 0:0:0:0:0:ffff:150f:4ed7
21.15.78.216 0:0:0:0:0:ffff:150f:4ed8
21.15.78.217 0:0:0:0:0:ffff:150f:4ed9
21.15.78.218 0:0:0:0:0:ffff:150f:4eda
21.15.78.219 0:0:0:0:0:ffff:150f:4edb
21.15.78.220 0:0:0:0:0:ffff:150f:4edc
21.15.78.221 0:0:0:0:0:ffff:150f:4edd
21.15.78.222 0:0:0:0:0:ffff:150f:4ede
21.15.78.223 0:0:0:0:0:ffff:150f:4edf
21.15.78.224 0:0:0:0:0:ffff:150f:4ee0
21.15.78.225 0:0:0:0:0:ffff:150f:4ee1
21.15.78.226 0:0:0:0:0:ffff:150f:4ee2
21.15.78.227 0:0:0:0:0:ffff:150f:4ee3
21.15.78.228 0:0:0:0:0:ffff:150f:4ee4
21.15.78.229 0:0:0:0:0:ffff:150f:4ee5
21.15.78.230 0:0:0:0:0:ffff:150f:4ee6
21.15.78.231 0:0:0:0:0:ffff:150f:4ee7
21.15.78.232 0:0:0:0:0:ffff:150f:4ee8
21.15.78.233 0:0:0:0:0:ffff:150f:4ee9
21.15.78.234 0:0:0:0:0:ffff:150f:4eea
21.15.78.235 0:0:0:0:0:ffff:150f:4eeb
21.15.78.236 0:0:0:0:0:ffff:150f:4eec
21.15.78.237 0:0:0:0:0:ffff:150f:4eed
21.15.78.238 0:0:0:0:0:ffff:150f:4eee
21.15.78.239 0:0:0:0:0:ffff:150f:4eef
21.15.78.240 0:0:0:0:0:ffff:150f:4ef0
21.15.78.241 0:0:0:0:0:ffff:150f:4ef1
21.15.78.242 0:0:0:0:0:ffff:150f:4ef2
21.15.78.243 0:0:0:0:0:ffff:150f:4ef3
21.15.78.244 0:0:0:0:0:ffff:150f:4ef4
21.15.78.245 0:0:0:0:0:ffff:150f:4ef5
21.15.78.246 0:0:0:0:0:ffff:150f:4ef6
21.15.78.247 0:0:0:0:0:ffff:150f:4ef7
21.15.78.248 0:0:0:0:0:ffff:150f:4ef8
21.15.78.249 0:0:0:0:0:ffff:150f:4ef9
21.15.78.250 0:0:0:0:0:ffff:150f:4efa
21.15.78.251 0:0:0:0:0:ffff:150f:4efb
21.15.78.252 0:0:0:0:0:ffff:150f:4efc
21.15.78.253 0:0:0:0:0:ffff:150f:4efd
21.15.78.254 0:0:0:0:0:ffff:150f:4efe
21.15.78.255 0:0:0:0:0:ffff:150f:4eff


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.