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
65.121.12.1 0:0:0:0:0:ffff:4179:c01
65.121.12.2 0:0:0:0:0:ffff:4179:c02
65.121.12.3 0:0:0:0:0:ffff:4179:c03
65.121.12.4 0:0:0:0:0:ffff:4179:c04
65.121.12.5 0:0:0:0:0:ffff:4179:c05
65.121.12.6 0:0:0:0:0:ffff:4179:c06
65.121.12.7 0:0:0:0:0:ffff:4179:c07
65.121.12.8 0:0:0:0:0:ffff:4179:c08
65.121.12.9 0:0:0:0:0:ffff:4179:c09
65.121.12.10 0:0:0:0:0:ffff:4179:c0a
65.121.12.11 0:0:0:0:0:ffff:4179:c0b
65.121.12.12 0:0:0:0:0:ffff:4179:c0c
65.121.12.13 0:0:0:0:0:ffff:4179:c0d
65.121.12.14 0:0:0:0:0:ffff:4179:c0e
65.121.12.15 0:0:0:0:0:ffff:4179:c0f
65.121.12.16 0:0:0:0:0:ffff:4179:c10
65.121.12.17 0:0:0:0:0:ffff:4179:c11
65.121.12.18 0:0:0:0:0:ffff:4179:c12
65.121.12.19 0:0:0:0:0:ffff:4179:c13
65.121.12.20 0:0:0:0:0:ffff:4179:c14
65.121.12.21 0:0:0:0:0:ffff:4179:c15
65.121.12.22 0:0:0:0:0:ffff:4179:c16
65.121.12.23 0:0:0:0:0:ffff:4179:c17
65.121.12.24 0:0:0:0:0:ffff:4179:c18
65.121.12.25 0:0:0:0:0:ffff:4179:c19
65.121.12.26 0:0:0:0:0:ffff:4179:c1a
65.121.12.27 0:0:0:0:0:ffff:4179:c1b
65.121.12.28 0:0:0:0:0:ffff:4179:c1c
65.121.12.29 0:0:0:0:0:ffff:4179:c1d
65.121.12.30 0:0:0:0:0:ffff:4179:c1e
65.121.12.31 0:0:0:0:0:ffff:4179:c1f
65.121.12.32 0:0:0:0:0:ffff:4179:c20
65.121.12.33 0:0:0:0:0:ffff:4179:c21
65.121.12.34 0:0:0:0:0:ffff:4179:c22
65.121.12.35 0:0:0:0:0:ffff:4179:c23
65.121.12.36 0:0:0:0:0:ffff:4179:c24
65.121.12.37 0:0:0:0:0:ffff:4179:c25
65.121.12.38 0:0:0:0:0:ffff:4179:c26
65.121.12.39 0:0:0:0:0:ffff:4179:c27
65.121.12.40 0:0:0:0:0:ffff:4179:c28
65.121.12.41 0:0:0:0:0:ffff:4179:c29
65.121.12.42 0:0:0:0:0:ffff:4179:c2a
65.121.12.43 0:0:0:0:0:ffff:4179:c2b
65.121.12.44 0:0:0:0:0:ffff:4179:c2c
65.121.12.45 0:0:0:0:0:ffff:4179:c2d
65.121.12.46 0:0:0:0:0:ffff:4179:c2e
65.121.12.47 0:0:0:0:0:ffff:4179:c2f
65.121.12.48 0:0:0:0:0:ffff:4179:c30
65.121.12.49 0:0:0:0:0:ffff:4179:c31
65.121.12.50 0:0:0:0:0:ffff:4179:c32
65.121.12.51 0:0:0:0:0:ffff:4179:c33
65.121.12.52 0:0:0:0:0:ffff:4179:c34
65.121.12.53 0:0:0:0:0:ffff:4179:c35
65.121.12.54 0:0:0:0:0:ffff:4179:c36
65.121.12.55 0:0:0:0:0:ffff:4179:c37
65.121.12.56 0:0:0:0:0:ffff:4179:c38
65.121.12.57 0:0:0:0:0:ffff:4179:c39
65.121.12.58 0:0:0:0:0:ffff:4179:c3a
65.121.12.59 0:0:0:0:0:ffff:4179:c3b
65.121.12.60 0:0:0:0:0:ffff:4179:c3c


65.121.12.61 0:0:0:0:0:ffff:4179:c3d
65.121.12.62 0:0:0:0:0:ffff:4179:c3e
65.121.12.63 0:0:0:0:0:ffff:4179:c3f
65.121.12.64 0:0:0:0:0:ffff:4179:c40
65.121.12.65 0:0:0:0:0:ffff:4179:c41
65.121.12.66 0:0:0:0:0:ffff:4179:c42
65.121.12.67 0:0:0:0:0:ffff:4179:c43
65.121.12.68 0:0:0:0:0:ffff:4179:c44
65.121.12.69 0:0:0:0:0:ffff:4179:c45
65.121.12.70 0:0:0:0:0:ffff:4179:c46
65.121.12.71 0:0:0:0:0:ffff:4179:c47
65.121.12.72 0:0:0:0:0:ffff:4179:c48
65.121.12.73 0:0:0:0:0:ffff:4179:c49
65.121.12.74 0:0:0:0:0:ffff:4179:c4a
65.121.12.75 0:0:0:0:0:ffff:4179:c4b
65.121.12.76 0:0:0:0:0:ffff:4179:c4c
65.121.12.77 0:0:0:0:0:ffff:4179:c4d
65.121.12.78 0:0:0:0:0:ffff:4179:c4e
65.121.12.79 0:0:0:0:0:ffff:4179:c4f
65.121.12.80 0:0:0:0:0:ffff:4179:c50
65.121.12.81 0:0:0:0:0:ffff:4179:c51
65.121.12.82 0:0:0:0:0:ffff:4179:c52
65.121.12.83 0:0:0:0:0:ffff:4179:c53
65.121.12.84 0:0:0:0:0:ffff:4179:c54
65.121.12.85 0:0:0:0:0:ffff:4179:c55
65.121.12.86 0:0:0:0:0:ffff:4179:c56
65.121.12.87 0:0:0:0:0:ffff:4179:c57
65.121.12.88 0:0:0:0:0:ffff:4179:c58
65.121.12.89 0:0:0:0:0:ffff:4179:c59
65.121.12.90 0:0:0:0:0:ffff:4179:c5a
65.121.12.91 0:0:0:0:0:ffff:4179:c5b
65.121.12.92 0:0:0:0:0:ffff:4179:c5c
65.121.12.93 0:0:0:0:0:ffff:4179:c5d
65.121.12.94 0:0:0:0:0:ffff:4179:c5e
65.121.12.95 0:0:0:0:0:ffff:4179:c5f
65.121.12.96 0:0:0:0:0:ffff:4179:c60
65.121.12.97 0:0:0:0:0:ffff:4179:c61
65.121.12.98 0:0:0:0:0:ffff:4179:c62
65.121.12.99 0:0:0:0:0:ffff:4179:c63
65.121.12.100 0:0:0:0:0:ffff:4179:c64
65.121.12.101 0:0:0:0:0:ffff:4179:c65
65.121.12.102 0:0:0:0:0:ffff:4179:c66
65.121.12.103 0:0:0:0:0:ffff:4179:c67
65.121.12.104 0:0:0:0:0:ffff:4179:c68
65.121.12.105 0:0:0:0:0:ffff:4179:c69
65.121.12.106 0:0:0:0:0:ffff:4179:c6a
65.121.12.107 0:0:0:0:0:ffff:4179:c6b
65.121.12.108 0:0:0:0:0:ffff:4179:c6c
65.121.12.109 0:0:0:0:0:ffff:4179:c6d
65.121.12.110 0:0:0:0:0:ffff:4179:c6e
65.121.12.111 0:0:0:0:0:ffff:4179:c6f
65.121.12.112 0:0:0:0:0:ffff:4179:c70
65.121.12.113 0:0:0:0:0:ffff:4179:c71
65.121.12.114 0:0:0:0:0:ffff:4179:c72
65.121.12.115 0:0:0:0:0:ffff:4179:c73
65.121.12.116 0:0:0:0:0:ffff:4179:c74
65.121.12.117 0:0:0:0:0:ffff:4179:c75
65.121.12.118 0:0:0:0:0:ffff:4179:c76
65.121.12.119 0:0:0:0:0:ffff:4179:c77
65.121.12.120 0:0:0:0:0:ffff:4179:c78


65.121.12.121 0:0:0:0:0:ffff:4179:c79
65.121.12.122 0:0:0:0:0:ffff:4179:c7a
65.121.12.123 0:0:0:0:0:ffff:4179:c7b
65.121.12.124 0:0:0:0:0:ffff:4179:c7c
65.121.12.125 0:0:0:0:0:ffff:4179:c7d
65.121.12.126 0:0:0:0:0:ffff:4179:c7e
65.121.12.127 0:0:0:0:0:ffff:4179:c7f
65.121.12.128 0:0:0:0:0:ffff:4179:c80
65.121.12.129 0:0:0:0:0:ffff:4179:c81
65.121.12.130 0:0:0:0:0:ffff:4179:c82
65.121.12.131 0:0:0:0:0:ffff:4179:c83
65.121.12.132 0:0:0:0:0:ffff:4179:c84
65.121.12.133 0:0:0:0:0:ffff:4179:c85
65.121.12.134 0:0:0:0:0:ffff:4179:c86
65.121.12.135 0:0:0:0:0:ffff:4179:c87
65.121.12.136 0:0:0:0:0:ffff:4179:c88
65.121.12.137 0:0:0:0:0:ffff:4179:c89
65.121.12.138 0:0:0:0:0:ffff:4179:c8a
65.121.12.139 0:0:0:0:0:ffff:4179:c8b
65.121.12.140 0:0:0:0:0:ffff:4179:c8c
65.121.12.141 0:0:0:0:0:ffff:4179:c8d
65.121.12.142 0:0:0:0:0:ffff:4179:c8e
65.121.12.143 0:0:0:0:0:ffff:4179:c8f
65.121.12.144 0:0:0:0:0:ffff:4179:c90
65.121.12.145 0:0:0:0:0:ffff:4179:c91
65.121.12.146 0:0:0:0:0:ffff:4179:c92
65.121.12.147 0:0:0:0:0:ffff:4179:c93
65.121.12.148 0:0:0:0:0:ffff:4179:c94
65.121.12.149 0:0:0:0:0:ffff:4179:c95
65.121.12.150 0:0:0:0:0:ffff:4179:c96
65.121.12.151 0:0:0:0:0:ffff:4179:c97
65.121.12.152 0:0:0:0:0:ffff:4179:c98
65.121.12.153 0:0:0:0:0:ffff:4179:c99
65.121.12.154 0:0:0:0:0:ffff:4179:c9a
65.121.12.155 0:0:0:0:0:ffff:4179:c9b
65.121.12.156 0:0:0:0:0:ffff:4179:c9c
65.121.12.157 0:0:0:0:0:ffff:4179:c9d
65.121.12.158 0:0:0:0:0:ffff:4179:c9e
65.121.12.159 0:0:0:0:0:ffff:4179:c9f
65.121.12.160 0:0:0:0:0:ffff:4179:ca0
65.121.12.161 0:0:0:0:0:ffff:4179:ca1
65.121.12.162 0:0:0:0:0:ffff:4179:ca2
65.121.12.163 0:0:0:0:0:ffff:4179:ca3
65.121.12.164 0:0:0:0:0:ffff:4179:ca4
65.121.12.165 0:0:0:0:0:ffff:4179:ca5
65.121.12.166 0:0:0:0:0:ffff:4179:ca6
65.121.12.167 0:0:0:0:0:ffff:4179:ca7
65.121.12.168 0:0:0:0:0:ffff:4179:ca8
65.121.12.169 0:0:0:0:0:ffff:4179:ca9
65.121.12.170 0:0:0:0:0:ffff:4179:caa
65.121.12.171 0:0:0:0:0:ffff:4179:cab
65.121.12.172 0:0:0:0:0:ffff:4179:cac
65.121.12.173 0:0:0:0:0:ffff:4179:cad
65.121.12.174 0:0:0:0:0:ffff:4179:cae
65.121.12.175 0:0:0:0:0:ffff:4179:caf
65.121.12.176 0:0:0:0:0:ffff:4179:cb0
65.121.12.177 0:0:0:0:0:ffff:4179:cb1
65.121.12.178 0:0:0:0:0:ffff:4179:cb2
65.121.12.179 0:0:0:0:0:ffff:4179:cb3
65.121.12.180 0:0:0:0:0:ffff:4179:cb4


65.121.12.181 0:0:0:0:0:ffff:4179:cb5
65.121.12.182 0:0:0:0:0:ffff:4179:cb6
65.121.12.183 0:0:0:0:0:ffff:4179:cb7
65.121.12.184 0:0:0:0:0:ffff:4179:cb8
65.121.12.185 0:0:0:0:0:ffff:4179:cb9
65.121.12.186 0:0:0:0:0:ffff:4179:cba
65.121.12.187 0:0:0:0:0:ffff:4179:cbb
65.121.12.188 0:0:0:0:0:ffff:4179:cbc
65.121.12.189 0:0:0:0:0:ffff:4179:cbd
65.121.12.190 0:0:0:0:0:ffff:4179:cbe
65.121.12.191 0:0:0:0:0:ffff:4179:cbf
65.121.12.192 0:0:0:0:0:ffff:4179:cc0
65.121.12.193 0:0:0:0:0:ffff:4179:cc1
65.121.12.194 0:0:0:0:0:ffff:4179:cc2
65.121.12.195 0:0:0:0:0:ffff:4179:cc3
65.121.12.196 0:0:0:0:0:ffff:4179:cc4
65.121.12.197 0:0:0:0:0:ffff:4179:cc5
65.121.12.198 0:0:0:0:0:ffff:4179:cc6
65.121.12.199 0:0:0:0:0:ffff:4179:cc7
65.121.12.200 0:0:0:0:0:ffff:4179:cc8
65.121.12.201 0:0:0:0:0:ffff:4179:cc9
65.121.12.202 0:0:0:0:0:ffff:4179:cca
65.121.12.203 0:0:0:0:0:ffff:4179:ccb
65.121.12.204 0:0:0:0:0:ffff:4179:ccc
65.121.12.205 0:0:0:0:0:ffff:4179:ccd
65.121.12.206 0:0:0:0:0:ffff:4179:cce
65.121.12.207 0:0:0:0:0:ffff:4179:ccf
65.121.12.208 0:0:0:0:0:ffff:4179:cd0
65.121.12.209 0:0:0:0:0:ffff:4179:cd1
65.121.12.210 0:0:0:0:0:ffff:4179:cd2
65.121.12.211 0:0:0:0:0:ffff:4179:cd3
65.121.12.212 0:0:0:0:0:ffff:4179:cd4
65.121.12.213 0:0:0:0:0:ffff:4179:cd5
65.121.12.214 0:0:0:0:0:ffff:4179:cd6
65.121.12.215 0:0:0:0:0:ffff:4179:cd7
65.121.12.216 0:0:0:0:0:ffff:4179:cd8
65.121.12.217 0:0:0:0:0:ffff:4179:cd9
65.121.12.218 0:0:0:0:0:ffff:4179:cda
65.121.12.219 0:0:0:0:0:ffff:4179:cdb
65.121.12.220 0:0:0:0:0:ffff:4179:cdc
65.121.12.221 0:0:0:0:0:ffff:4179:cdd
65.121.12.222 0:0:0:0:0:ffff:4179:cde
65.121.12.223 0:0:0:0:0:ffff:4179:cdf
65.121.12.224 0:0:0:0:0:ffff:4179:ce0
65.121.12.225 0:0:0:0:0:ffff:4179:ce1
65.121.12.226 0:0:0:0:0:ffff:4179:ce2
65.121.12.227 0:0:0:0:0:ffff:4179:ce3
65.121.12.228 0:0:0:0:0:ffff:4179:ce4
65.121.12.229 0:0:0:0:0:ffff:4179:ce5
65.121.12.230 0:0:0:0:0:ffff:4179:ce6
65.121.12.231 0:0:0:0:0:ffff:4179:ce7
65.121.12.232 0:0:0:0:0:ffff:4179:ce8
65.121.12.233 0:0:0:0:0:ffff:4179:ce9
65.121.12.234 0:0:0:0:0:ffff:4179:cea
65.121.12.235 0:0:0:0:0:ffff:4179:ceb
65.121.12.236 0:0:0:0:0:ffff:4179:cec
65.121.12.237 0:0:0:0:0:ffff:4179:ced
65.121.12.238 0:0:0:0:0:ffff:4179:cee
65.121.12.239 0:0:0:0:0:ffff:4179:cef
65.121.12.240 0:0:0:0:0:ffff:4179:cf0
65.121.12.241 0:0:0:0:0:ffff:4179:cf1
65.121.12.242 0:0:0:0:0:ffff:4179:cf2
65.121.12.243 0:0:0:0:0:ffff:4179:cf3
65.121.12.244 0:0:0:0:0:ffff:4179:cf4
65.121.12.245 0:0:0:0:0:ffff:4179:cf5
65.121.12.246 0:0:0:0:0:ffff:4179:cf6
65.121.12.247 0:0:0:0:0:ffff:4179:cf7
65.121.12.248 0:0:0:0:0:ffff:4179:cf8
65.121.12.249 0:0:0:0:0:ffff:4179:cf9
65.121.12.250 0:0:0:0:0:ffff:4179:cfa
65.121.12.251 0:0:0:0:0:ffff:4179:cfb
65.121.12.252 0:0:0:0:0:ffff:4179:cfc
65.121.12.253 0:0:0:0:0:ffff:4179:cfd
65.121.12.254 0:0:0:0:0:ffff:4179:cfe
65.121.12.255 0:0:0:0:0:ffff:4179:cff


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.