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
65.121.240.1 0:0:0:0:0:ffff:4179:f001
65.121.240.2 0:0:0:0:0:ffff:4179:f002
65.121.240.3 0:0:0:0:0:ffff:4179:f003
65.121.240.4 0:0:0:0:0:ffff:4179:f004
65.121.240.5 0:0:0:0:0:ffff:4179:f005
65.121.240.6 0:0:0:0:0:ffff:4179:f006
65.121.240.7 0:0:0:0:0:ffff:4179:f007
65.121.240.8 0:0:0:0:0:ffff:4179:f008
65.121.240.9 0:0:0:0:0:ffff:4179:f009
65.121.240.10 0:0:0:0:0:ffff:4179:f00a
65.121.240.11 0:0:0:0:0:ffff:4179:f00b
65.121.240.12 0:0:0:0:0:ffff:4179:f00c
65.121.240.13 0:0:0:0:0:ffff:4179:f00d
65.121.240.14 0:0:0:0:0:ffff:4179:f00e
65.121.240.15 0:0:0:0:0:ffff:4179:f00f
65.121.240.16 0:0:0:0:0:ffff:4179:f010
65.121.240.17 0:0:0:0:0:ffff:4179:f011
65.121.240.18 0:0:0:0:0:ffff:4179:f012
65.121.240.19 0:0:0:0:0:ffff:4179:f013
65.121.240.20 0:0:0:0:0:ffff:4179:f014
65.121.240.21 0:0:0:0:0:ffff:4179:f015
65.121.240.22 0:0:0:0:0:ffff:4179:f016
65.121.240.23 0:0:0:0:0:ffff:4179:f017
65.121.240.24 0:0:0:0:0:ffff:4179:f018
65.121.240.25 0:0:0:0:0:ffff:4179:f019
65.121.240.26 0:0:0:0:0:ffff:4179:f01a
65.121.240.27 0:0:0:0:0:ffff:4179:f01b
65.121.240.28 0:0:0:0:0:ffff:4179:f01c
65.121.240.29 0:0:0:0:0:ffff:4179:f01d
65.121.240.30 0:0:0:0:0:ffff:4179:f01e
65.121.240.31 0:0:0:0:0:ffff:4179:f01f
65.121.240.32 0:0:0:0:0:ffff:4179:f020
65.121.240.33 0:0:0:0:0:ffff:4179:f021
65.121.240.34 0:0:0:0:0:ffff:4179:f022
65.121.240.35 0:0:0:0:0:ffff:4179:f023
65.121.240.36 0:0:0:0:0:ffff:4179:f024
65.121.240.37 0:0:0:0:0:ffff:4179:f025
65.121.240.38 0:0:0:0:0:ffff:4179:f026
65.121.240.39 0:0:0:0:0:ffff:4179:f027
65.121.240.40 0:0:0:0:0:ffff:4179:f028
65.121.240.41 0:0:0:0:0:ffff:4179:f029
65.121.240.42 0:0:0:0:0:ffff:4179:f02a
65.121.240.43 0:0:0:0:0:ffff:4179:f02b
65.121.240.44 0:0:0:0:0:ffff:4179:f02c
65.121.240.45 0:0:0:0:0:ffff:4179:f02d
65.121.240.46 0:0:0:0:0:ffff:4179:f02e
65.121.240.47 0:0:0:0:0:ffff:4179:f02f
65.121.240.48 0:0:0:0:0:ffff:4179:f030
65.121.240.49 0:0:0:0:0:ffff:4179:f031
65.121.240.50 0:0:0:0:0:ffff:4179:f032
65.121.240.51 0:0:0:0:0:ffff:4179:f033
65.121.240.52 0:0:0:0:0:ffff:4179:f034
65.121.240.53 0:0:0:0:0:ffff:4179:f035
65.121.240.54 0:0:0:0:0:ffff:4179:f036
65.121.240.55 0:0:0:0:0:ffff:4179:f037
65.121.240.56 0:0:0:0:0:ffff:4179:f038
65.121.240.57 0:0:0:0:0:ffff:4179:f039
65.121.240.58 0:0:0:0:0:ffff:4179:f03a
65.121.240.59 0:0:0:0:0:ffff:4179:f03b
65.121.240.60 0:0:0:0:0:ffff:4179:f03c


65.121.240.61 0:0:0:0:0:ffff:4179:f03d
65.121.240.62 0:0:0:0:0:ffff:4179:f03e
65.121.240.63 0:0:0:0:0:ffff:4179:f03f
65.121.240.64 0:0:0:0:0:ffff:4179:f040
65.121.240.65 0:0:0:0:0:ffff:4179:f041
65.121.240.66 0:0:0:0:0:ffff:4179:f042
65.121.240.67 0:0:0:0:0:ffff:4179:f043
65.121.240.68 0:0:0:0:0:ffff:4179:f044
65.121.240.69 0:0:0:0:0:ffff:4179:f045
65.121.240.70 0:0:0:0:0:ffff:4179:f046
65.121.240.71 0:0:0:0:0:ffff:4179:f047
65.121.240.72 0:0:0:0:0:ffff:4179:f048
65.121.240.73 0:0:0:0:0:ffff:4179:f049
65.121.240.74 0:0:0:0:0:ffff:4179:f04a
65.121.240.75 0:0:0:0:0:ffff:4179:f04b
65.121.240.76 0:0:0:0:0:ffff:4179:f04c
65.121.240.77 0:0:0:0:0:ffff:4179:f04d
65.121.240.78 0:0:0:0:0:ffff:4179:f04e
65.121.240.79 0:0:0:0:0:ffff:4179:f04f
65.121.240.80 0:0:0:0:0:ffff:4179:f050
65.121.240.81 0:0:0:0:0:ffff:4179:f051
65.121.240.82 0:0:0:0:0:ffff:4179:f052
65.121.240.83 0:0:0:0:0:ffff:4179:f053
65.121.240.84 0:0:0:0:0:ffff:4179:f054
65.121.240.85 0:0:0:0:0:ffff:4179:f055
65.121.240.86 0:0:0:0:0:ffff:4179:f056
65.121.240.87 0:0:0:0:0:ffff:4179:f057
65.121.240.88 0:0:0:0:0:ffff:4179:f058
65.121.240.89 0:0:0:0:0:ffff:4179:f059
65.121.240.90 0:0:0:0:0:ffff:4179:f05a
65.121.240.91 0:0:0:0:0:ffff:4179:f05b
65.121.240.92 0:0:0:0:0:ffff:4179:f05c
65.121.240.93 0:0:0:0:0:ffff:4179:f05d
65.121.240.94 0:0:0:0:0:ffff:4179:f05e
65.121.240.95 0:0:0:0:0:ffff:4179:f05f
65.121.240.96 0:0:0:0:0:ffff:4179:f060
65.121.240.97 0:0:0:0:0:ffff:4179:f061
65.121.240.98 0:0:0:0:0:ffff:4179:f062
65.121.240.99 0:0:0:0:0:ffff:4179:f063
65.121.240.100 0:0:0:0:0:ffff:4179:f064
65.121.240.101 0:0:0:0:0:ffff:4179:f065
65.121.240.102 0:0:0:0:0:ffff:4179:f066
65.121.240.103 0:0:0:0:0:ffff:4179:f067
65.121.240.104 0:0:0:0:0:ffff:4179:f068
65.121.240.105 0:0:0:0:0:ffff:4179:f069
65.121.240.106 0:0:0:0:0:ffff:4179:f06a
65.121.240.107 0:0:0:0:0:ffff:4179:f06b
65.121.240.108 0:0:0:0:0:ffff:4179:f06c
65.121.240.109 0:0:0:0:0:ffff:4179:f06d
65.121.240.110 0:0:0:0:0:ffff:4179:f06e
65.121.240.111 0:0:0:0:0:ffff:4179:f06f
65.121.240.112 0:0:0:0:0:ffff:4179:f070
65.121.240.113 0:0:0:0:0:ffff:4179:f071
65.121.240.114 0:0:0:0:0:ffff:4179:f072
65.121.240.115 0:0:0:0:0:ffff:4179:f073
65.121.240.116 0:0:0:0:0:ffff:4179:f074
65.121.240.117 0:0:0:0:0:ffff:4179:f075
65.121.240.118 0:0:0:0:0:ffff:4179:f076
65.121.240.119 0:0:0:0:0:ffff:4179:f077
65.121.240.120 0:0:0:0:0:ffff:4179:f078


65.121.240.121 0:0:0:0:0:ffff:4179:f079
65.121.240.122 0:0:0:0:0:ffff:4179:f07a
65.121.240.123 0:0:0:0:0:ffff:4179:f07b
65.121.240.124 0:0:0:0:0:ffff:4179:f07c
65.121.240.125 0:0:0:0:0:ffff:4179:f07d
65.121.240.126 0:0:0:0:0:ffff:4179:f07e
65.121.240.127 0:0:0:0:0:ffff:4179:f07f
65.121.240.128 0:0:0:0:0:ffff:4179:f080
65.121.240.129 0:0:0:0:0:ffff:4179:f081
65.121.240.130 0:0:0:0:0:ffff:4179:f082
65.121.240.131 0:0:0:0:0:ffff:4179:f083
65.121.240.132 0:0:0:0:0:ffff:4179:f084
65.121.240.133 0:0:0:0:0:ffff:4179:f085
65.121.240.134 0:0:0:0:0:ffff:4179:f086
65.121.240.135 0:0:0:0:0:ffff:4179:f087
65.121.240.136 0:0:0:0:0:ffff:4179:f088
65.121.240.137 0:0:0:0:0:ffff:4179:f089
65.121.240.138 0:0:0:0:0:ffff:4179:f08a
65.121.240.139 0:0:0:0:0:ffff:4179:f08b
65.121.240.140 0:0:0:0:0:ffff:4179:f08c
65.121.240.141 0:0:0:0:0:ffff:4179:f08d
65.121.240.142 0:0:0:0:0:ffff:4179:f08e
65.121.240.143 0:0:0:0:0:ffff:4179:f08f
65.121.240.144 0:0:0:0:0:ffff:4179:f090
65.121.240.145 0:0:0:0:0:ffff:4179:f091
65.121.240.146 0:0:0:0:0:ffff:4179:f092
65.121.240.147 0:0:0:0:0:ffff:4179:f093
65.121.240.148 0:0:0:0:0:ffff:4179:f094
65.121.240.149 0:0:0:0:0:ffff:4179:f095
65.121.240.150 0:0:0:0:0:ffff:4179:f096
65.121.240.151 0:0:0:0:0:ffff:4179:f097
65.121.240.152 0:0:0:0:0:ffff:4179:f098
65.121.240.153 0:0:0:0:0:ffff:4179:f099
65.121.240.154 0:0:0:0:0:ffff:4179:f09a
65.121.240.155 0:0:0:0:0:ffff:4179:f09b
65.121.240.156 0:0:0:0:0:ffff:4179:f09c
65.121.240.157 0:0:0:0:0:ffff:4179:f09d
65.121.240.158 0:0:0:0:0:ffff:4179:f09e
65.121.240.159 0:0:0:0:0:ffff:4179:f09f
65.121.240.160 0:0:0:0:0:ffff:4179:f0a0
65.121.240.161 0:0:0:0:0:ffff:4179:f0a1
65.121.240.162 0:0:0:0:0:ffff:4179:f0a2
65.121.240.163 0:0:0:0:0:ffff:4179:f0a3
65.121.240.164 0:0:0:0:0:ffff:4179:f0a4
65.121.240.165 0:0:0:0:0:ffff:4179:f0a5
65.121.240.166 0:0:0:0:0:ffff:4179:f0a6
65.121.240.167 0:0:0:0:0:ffff:4179:f0a7
65.121.240.168 0:0:0:0:0:ffff:4179:f0a8
65.121.240.169 0:0:0:0:0:ffff:4179:f0a9
65.121.240.170 0:0:0:0:0:ffff:4179:f0aa
65.121.240.171 0:0:0:0:0:ffff:4179:f0ab
65.121.240.172 0:0:0:0:0:ffff:4179:f0ac
65.121.240.173 0:0:0:0:0:ffff:4179:f0ad
65.121.240.174 0:0:0:0:0:ffff:4179:f0ae
65.121.240.175 0:0:0:0:0:ffff:4179:f0af
65.121.240.176 0:0:0:0:0:ffff:4179:f0b0
65.121.240.177 0:0:0:0:0:ffff:4179:f0b1
65.121.240.178 0:0:0:0:0:ffff:4179:f0b2
65.121.240.179 0:0:0:0:0:ffff:4179:f0b3
65.121.240.180 0:0:0:0:0:ffff:4179:f0b4


65.121.240.181 0:0:0:0:0:ffff:4179:f0b5
65.121.240.182 0:0:0:0:0:ffff:4179:f0b6
65.121.240.183 0:0:0:0:0:ffff:4179:f0b7
65.121.240.184 0:0:0:0:0:ffff:4179:f0b8
65.121.240.185 0:0:0:0:0:ffff:4179:f0b9
65.121.240.186 0:0:0:0:0:ffff:4179:f0ba
65.121.240.187 0:0:0:0:0:ffff:4179:f0bb
65.121.240.188 0:0:0:0:0:ffff:4179:f0bc
65.121.240.189 0:0:0:0:0:ffff:4179:f0bd
65.121.240.190 0:0:0:0:0:ffff:4179:f0be
65.121.240.191 0:0:0:0:0:ffff:4179:f0bf
65.121.240.192 0:0:0:0:0:ffff:4179:f0c0
65.121.240.193 0:0:0:0:0:ffff:4179:f0c1
65.121.240.194 0:0:0:0:0:ffff:4179:f0c2
65.121.240.195 0:0:0:0:0:ffff:4179:f0c3
65.121.240.196 0:0:0:0:0:ffff:4179:f0c4
65.121.240.197 0:0:0:0:0:ffff:4179:f0c5
65.121.240.198 0:0:0:0:0:ffff:4179:f0c6
65.121.240.199 0:0:0:0:0:ffff:4179:f0c7
65.121.240.200 0:0:0:0:0:ffff:4179:f0c8
65.121.240.201 0:0:0:0:0:ffff:4179:f0c9
65.121.240.202 0:0:0:0:0:ffff:4179:f0ca
65.121.240.203 0:0:0:0:0:ffff:4179:f0cb
65.121.240.204 0:0:0:0:0:ffff:4179:f0cc
65.121.240.205 0:0:0:0:0:ffff:4179:f0cd
65.121.240.206 0:0:0:0:0:ffff:4179:f0ce
65.121.240.207 0:0:0:0:0:ffff:4179:f0cf
65.121.240.208 0:0:0:0:0:ffff:4179:f0d0
65.121.240.209 0:0:0:0:0:ffff:4179:f0d1
65.121.240.210 0:0:0:0:0:ffff:4179:f0d2
65.121.240.211 0:0:0:0:0:ffff:4179:f0d3
65.121.240.212 0:0:0:0:0:ffff:4179:f0d4
65.121.240.213 0:0:0:0:0:ffff:4179:f0d5
65.121.240.214 0:0:0:0:0:ffff:4179:f0d6
65.121.240.215 0:0:0:0:0:ffff:4179:f0d7
65.121.240.216 0:0:0:0:0:ffff:4179:f0d8
65.121.240.217 0:0:0:0:0:ffff:4179:f0d9
65.121.240.218 0:0:0:0:0:ffff:4179:f0da
65.121.240.219 0:0:0:0:0:ffff:4179:f0db
65.121.240.220 0:0:0:0:0:ffff:4179:f0dc
65.121.240.221 0:0:0:0:0:ffff:4179:f0dd
65.121.240.222 0:0:0:0:0:ffff:4179:f0de
65.121.240.223 0:0:0:0:0:ffff:4179:f0df
65.121.240.224 0:0:0:0:0:ffff:4179:f0e0
65.121.240.225 0:0:0:0:0:ffff:4179:f0e1
65.121.240.226 0:0:0:0:0:ffff:4179:f0e2
65.121.240.227 0:0:0:0:0:ffff:4179:f0e3
65.121.240.228 0:0:0:0:0:ffff:4179:f0e4
65.121.240.229 0:0:0:0:0:ffff:4179:f0e5
65.121.240.230 0:0:0:0:0:ffff:4179:f0e6
65.121.240.231 0:0:0:0:0:ffff:4179:f0e7
65.121.240.232 0:0:0:0:0:ffff:4179:f0e8
65.121.240.233 0:0:0:0:0:ffff:4179:f0e9
65.121.240.234 0:0:0:0:0:ffff:4179:f0ea
65.121.240.235 0:0:0:0:0:ffff:4179:f0eb
65.121.240.236 0:0:0:0:0:ffff:4179:f0ec
65.121.240.237 0:0:0:0:0:ffff:4179:f0ed
65.121.240.238 0:0:0:0:0:ffff:4179:f0ee
65.121.240.239 0:0:0:0:0:ffff:4179:f0ef
65.121.240.240 0:0:0:0:0:ffff:4179:f0f0
65.121.240.241 0:0:0:0:0:ffff:4179:f0f1
65.121.240.242 0:0:0:0:0:ffff:4179:f0f2
65.121.240.243 0:0:0:0:0:ffff:4179:f0f3
65.121.240.244 0:0:0:0:0:ffff:4179:f0f4
65.121.240.245 0:0:0:0:0:ffff:4179:f0f5
65.121.240.246 0:0:0:0:0:ffff:4179:f0f6
65.121.240.247 0:0:0:0:0:ffff:4179:f0f7
65.121.240.248 0:0:0:0:0:ffff:4179:f0f8
65.121.240.249 0:0:0:0:0:ffff:4179:f0f9
65.121.240.250 0:0:0:0:0:ffff:4179:f0fa
65.121.240.251 0:0:0:0:0:ffff:4179:f0fb
65.121.240.252 0:0:0:0:0:ffff:4179:f0fc
65.121.240.253 0:0:0:0:0:ffff:4179:f0fd
65.121.240.254 0:0:0:0:0:ffff:4179:f0fe
65.121.240.255 0:0:0:0:0:ffff:4179:f0ff


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.