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
65.121.205.1 0:0:0:0:0:ffff:4179:cd01
65.121.205.2 0:0:0:0:0:ffff:4179:cd02
65.121.205.3 0:0:0:0:0:ffff:4179:cd03
65.121.205.4 0:0:0:0:0:ffff:4179:cd04
65.121.205.5 0:0:0:0:0:ffff:4179:cd05
65.121.205.6 0:0:0:0:0:ffff:4179:cd06
65.121.205.7 0:0:0:0:0:ffff:4179:cd07
65.121.205.8 0:0:0:0:0:ffff:4179:cd08
65.121.205.9 0:0:0:0:0:ffff:4179:cd09
65.121.205.10 0:0:0:0:0:ffff:4179:cd0a
65.121.205.11 0:0:0:0:0:ffff:4179:cd0b
65.121.205.12 0:0:0:0:0:ffff:4179:cd0c
65.121.205.13 0:0:0:0:0:ffff:4179:cd0d
65.121.205.14 0:0:0:0:0:ffff:4179:cd0e
65.121.205.15 0:0:0:0:0:ffff:4179:cd0f
65.121.205.16 0:0:0:0:0:ffff:4179:cd10
65.121.205.17 0:0:0:0:0:ffff:4179:cd11
65.121.205.18 0:0:0:0:0:ffff:4179:cd12
65.121.205.19 0:0:0:0:0:ffff:4179:cd13
65.121.205.20 0:0:0:0:0:ffff:4179:cd14
65.121.205.21 0:0:0:0:0:ffff:4179:cd15
65.121.205.22 0:0:0:0:0:ffff:4179:cd16
65.121.205.23 0:0:0:0:0:ffff:4179:cd17
65.121.205.24 0:0:0:0:0:ffff:4179:cd18
65.121.205.25 0:0:0:0:0:ffff:4179:cd19
65.121.205.26 0:0:0:0:0:ffff:4179:cd1a
65.121.205.27 0:0:0:0:0:ffff:4179:cd1b
65.121.205.28 0:0:0:0:0:ffff:4179:cd1c
65.121.205.29 0:0:0:0:0:ffff:4179:cd1d
65.121.205.30 0:0:0:0:0:ffff:4179:cd1e
65.121.205.31 0:0:0:0:0:ffff:4179:cd1f
65.121.205.32 0:0:0:0:0:ffff:4179:cd20
65.121.205.33 0:0:0:0:0:ffff:4179:cd21
65.121.205.34 0:0:0:0:0:ffff:4179:cd22
65.121.205.35 0:0:0:0:0:ffff:4179:cd23
65.121.205.36 0:0:0:0:0:ffff:4179:cd24
65.121.205.37 0:0:0:0:0:ffff:4179:cd25
65.121.205.38 0:0:0:0:0:ffff:4179:cd26
65.121.205.39 0:0:0:0:0:ffff:4179:cd27
65.121.205.40 0:0:0:0:0:ffff:4179:cd28
65.121.205.41 0:0:0:0:0:ffff:4179:cd29
65.121.205.42 0:0:0:0:0:ffff:4179:cd2a
65.121.205.43 0:0:0:0:0:ffff:4179:cd2b
65.121.205.44 0:0:0:0:0:ffff:4179:cd2c
65.121.205.45 0:0:0:0:0:ffff:4179:cd2d
65.121.205.46 0:0:0:0:0:ffff:4179:cd2e
65.121.205.47 0:0:0:0:0:ffff:4179:cd2f
65.121.205.48 0:0:0:0:0:ffff:4179:cd30
65.121.205.49 0:0:0:0:0:ffff:4179:cd31
65.121.205.50 0:0:0:0:0:ffff:4179:cd32
65.121.205.51 0:0:0:0:0:ffff:4179:cd33
65.121.205.52 0:0:0:0:0:ffff:4179:cd34
65.121.205.53 0:0:0:0:0:ffff:4179:cd35
65.121.205.54 0:0:0:0:0:ffff:4179:cd36
65.121.205.55 0:0:0:0:0:ffff:4179:cd37
65.121.205.56 0:0:0:0:0:ffff:4179:cd38
65.121.205.57 0:0:0:0:0:ffff:4179:cd39
65.121.205.58 0:0:0:0:0:ffff:4179:cd3a
65.121.205.59 0:0:0:0:0:ffff:4179:cd3b
65.121.205.60 0:0:0:0:0:ffff:4179:cd3c


65.121.205.61 0:0:0:0:0:ffff:4179:cd3d
65.121.205.62 0:0:0:0:0:ffff:4179:cd3e
65.121.205.63 0:0:0:0:0:ffff:4179:cd3f
65.121.205.64 0:0:0:0:0:ffff:4179:cd40
65.121.205.65 0:0:0:0:0:ffff:4179:cd41
65.121.205.66 0:0:0:0:0:ffff:4179:cd42
65.121.205.67 0:0:0:0:0:ffff:4179:cd43
65.121.205.68 0:0:0:0:0:ffff:4179:cd44
65.121.205.69 0:0:0:0:0:ffff:4179:cd45
65.121.205.70 0:0:0:0:0:ffff:4179:cd46
65.121.205.71 0:0:0:0:0:ffff:4179:cd47
65.121.205.72 0:0:0:0:0:ffff:4179:cd48
65.121.205.73 0:0:0:0:0:ffff:4179:cd49
65.121.205.74 0:0:0:0:0:ffff:4179:cd4a
65.121.205.75 0:0:0:0:0:ffff:4179:cd4b
65.121.205.76 0:0:0:0:0:ffff:4179:cd4c
65.121.205.77 0:0:0:0:0:ffff:4179:cd4d
65.121.205.78 0:0:0:0:0:ffff:4179:cd4e
65.121.205.79 0:0:0:0:0:ffff:4179:cd4f
65.121.205.80 0:0:0:0:0:ffff:4179:cd50
65.121.205.81 0:0:0:0:0:ffff:4179:cd51
65.121.205.82 0:0:0:0:0:ffff:4179:cd52
65.121.205.83 0:0:0:0:0:ffff:4179:cd53
65.121.205.84 0:0:0:0:0:ffff:4179:cd54
65.121.205.85 0:0:0:0:0:ffff:4179:cd55
65.121.205.86 0:0:0:0:0:ffff:4179:cd56
65.121.205.87 0:0:0:0:0:ffff:4179:cd57
65.121.205.88 0:0:0:0:0:ffff:4179:cd58
65.121.205.89 0:0:0:0:0:ffff:4179:cd59
65.121.205.90 0:0:0:0:0:ffff:4179:cd5a
65.121.205.91 0:0:0:0:0:ffff:4179:cd5b
65.121.205.92 0:0:0:0:0:ffff:4179:cd5c
65.121.205.93 0:0:0:0:0:ffff:4179:cd5d
65.121.205.94 0:0:0:0:0:ffff:4179:cd5e
65.121.205.95 0:0:0:0:0:ffff:4179:cd5f
65.121.205.96 0:0:0:0:0:ffff:4179:cd60
65.121.205.97 0:0:0:0:0:ffff:4179:cd61
65.121.205.98 0:0:0:0:0:ffff:4179:cd62
65.121.205.99 0:0:0:0:0:ffff:4179:cd63
65.121.205.100 0:0:0:0:0:ffff:4179:cd64
65.121.205.101 0:0:0:0:0:ffff:4179:cd65
65.121.205.102 0:0:0:0:0:ffff:4179:cd66
65.121.205.103 0:0:0:0:0:ffff:4179:cd67
65.121.205.104 0:0:0:0:0:ffff:4179:cd68
65.121.205.105 0:0:0:0:0:ffff:4179:cd69
65.121.205.106 0:0:0:0:0:ffff:4179:cd6a
65.121.205.107 0:0:0:0:0:ffff:4179:cd6b
65.121.205.108 0:0:0:0:0:ffff:4179:cd6c
65.121.205.109 0:0:0:0:0:ffff:4179:cd6d
65.121.205.110 0:0:0:0:0:ffff:4179:cd6e
65.121.205.111 0:0:0:0:0:ffff:4179:cd6f
65.121.205.112 0:0:0:0:0:ffff:4179:cd70
65.121.205.113 0:0:0:0:0:ffff:4179:cd71
65.121.205.114 0:0:0:0:0:ffff:4179:cd72
65.121.205.115 0:0:0:0:0:ffff:4179:cd73
65.121.205.116 0:0:0:0:0:ffff:4179:cd74
65.121.205.117 0:0:0:0:0:ffff:4179:cd75
65.121.205.118 0:0:0:0:0:ffff:4179:cd76
65.121.205.119 0:0:0:0:0:ffff:4179:cd77
65.121.205.120 0:0:0:0:0:ffff:4179:cd78


65.121.205.121 0:0:0:0:0:ffff:4179:cd79
65.121.205.122 0:0:0:0:0:ffff:4179:cd7a
65.121.205.123 0:0:0:0:0:ffff:4179:cd7b
65.121.205.124 0:0:0:0:0:ffff:4179:cd7c
65.121.205.125 0:0:0:0:0:ffff:4179:cd7d
65.121.205.126 0:0:0:0:0:ffff:4179:cd7e
65.121.205.127 0:0:0:0:0:ffff:4179:cd7f
65.121.205.128 0:0:0:0:0:ffff:4179:cd80
65.121.205.129 0:0:0:0:0:ffff:4179:cd81
65.121.205.130 0:0:0:0:0:ffff:4179:cd82
65.121.205.131 0:0:0:0:0:ffff:4179:cd83
65.121.205.132 0:0:0:0:0:ffff:4179:cd84
65.121.205.133 0:0:0:0:0:ffff:4179:cd85
65.121.205.134 0:0:0:0:0:ffff:4179:cd86
65.121.205.135 0:0:0:0:0:ffff:4179:cd87
65.121.205.136 0:0:0:0:0:ffff:4179:cd88
65.121.205.137 0:0:0:0:0:ffff:4179:cd89
65.121.205.138 0:0:0:0:0:ffff:4179:cd8a
65.121.205.139 0:0:0:0:0:ffff:4179:cd8b
65.121.205.140 0:0:0:0:0:ffff:4179:cd8c
65.121.205.141 0:0:0:0:0:ffff:4179:cd8d
65.121.205.142 0:0:0:0:0:ffff:4179:cd8e
65.121.205.143 0:0:0:0:0:ffff:4179:cd8f
65.121.205.144 0:0:0:0:0:ffff:4179:cd90
65.121.205.145 0:0:0:0:0:ffff:4179:cd91
65.121.205.146 0:0:0:0:0:ffff:4179:cd92
65.121.205.147 0:0:0:0:0:ffff:4179:cd93
65.121.205.148 0:0:0:0:0:ffff:4179:cd94
65.121.205.149 0:0:0:0:0:ffff:4179:cd95
65.121.205.150 0:0:0:0:0:ffff:4179:cd96
65.121.205.151 0:0:0:0:0:ffff:4179:cd97
65.121.205.152 0:0:0:0:0:ffff:4179:cd98
65.121.205.153 0:0:0:0:0:ffff:4179:cd99
65.121.205.154 0:0:0:0:0:ffff:4179:cd9a
65.121.205.155 0:0:0:0:0:ffff:4179:cd9b
65.121.205.156 0:0:0:0:0:ffff:4179:cd9c
65.121.205.157 0:0:0:0:0:ffff:4179:cd9d
65.121.205.158 0:0:0:0:0:ffff:4179:cd9e
65.121.205.159 0:0:0:0:0:ffff:4179:cd9f
65.121.205.160 0:0:0:0:0:ffff:4179:cda0
65.121.205.161 0:0:0:0:0:ffff:4179:cda1
65.121.205.162 0:0:0:0:0:ffff:4179:cda2
65.121.205.163 0:0:0:0:0:ffff:4179:cda3
65.121.205.164 0:0:0:0:0:ffff:4179:cda4
65.121.205.165 0:0:0:0:0:ffff:4179:cda5
65.121.205.166 0:0:0:0:0:ffff:4179:cda6
65.121.205.167 0:0:0:0:0:ffff:4179:cda7
65.121.205.168 0:0:0:0:0:ffff:4179:cda8
65.121.205.169 0:0:0:0:0:ffff:4179:cda9
65.121.205.170 0:0:0:0:0:ffff:4179:cdaa
65.121.205.171 0:0:0:0:0:ffff:4179:cdab
65.121.205.172 0:0:0:0:0:ffff:4179:cdac
65.121.205.173 0:0:0:0:0:ffff:4179:cdad
65.121.205.174 0:0:0:0:0:ffff:4179:cdae
65.121.205.175 0:0:0:0:0:ffff:4179:cdaf
65.121.205.176 0:0:0:0:0:ffff:4179:cdb0
65.121.205.177 0:0:0:0:0:ffff:4179:cdb1
65.121.205.178 0:0:0:0:0:ffff:4179:cdb2
65.121.205.179 0:0:0:0:0:ffff:4179:cdb3
65.121.205.180 0:0:0:0:0:ffff:4179:cdb4


65.121.205.181 0:0:0:0:0:ffff:4179:cdb5
65.121.205.182 0:0:0:0:0:ffff:4179:cdb6
65.121.205.183 0:0:0:0:0:ffff:4179:cdb7
65.121.205.184 0:0:0:0:0:ffff:4179:cdb8
65.121.205.185 0:0:0:0:0:ffff:4179:cdb9
65.121.205.186 0:0:0:0:0:ffff:4179:cdba
65.121.205.187 0:0:0:0:0:ffff:4179:cdbb
65.121.205.188 0:0:0:0:0:ffff:4179:cdbc
65.121.205.189 0:0:0:0:0:ffff:4179:cdbd
65.121.205.190 0:0:0:0:0:ffff:4179:cdbe
65.121.205.191 0:0:0:0:0:ffff:4179:cdbf
65.121.205.192 0:0:0:0:0:ffff:4179:cdc0
65.121.205.193 0:0:0:0:0:ffff:4179:cdc1
65.121.205.194 0:0:0:0:0:ffff:4179:cdc2
65.121.205.195 0:0:0:0:0:ffff:4179:cdc3
65.121.205.196 0:0:0:0:0:ffff:4179:cdc4
65.121.205.197 0:0:0:0:0:ffff:4179:cdc5
65.121.205.198 0:0:0:0:0:ffff:4179:cdc6
65.121.205.199 0:0:0:0:0:ffff:4179:cdc7
65.121.205.200 0:0:0:0:0:ffff:4179:cdc8
65.121.205.201 0:0:0:0:0:ffff:4179:cdc9
65.121.205.202 0:0:0:0:0:ffff:4179:cdca
65.121.205.203 0:0:0:0:0:ffff:4179:cdcb
65.121.205.204 0:0:0:0:0:ffff:4179:cdcc
65.121.205.205 0:0:0:0:0:ffff:4179:cdcd
65.121.205.206 0:0:0:0:0:ffff:4179:cdce
65.121.205.207 0:0:0:0:0:ffff:4179:cdcf
65.121.205.208 0:0:0:0:0:ffff:4179:cdd0
65.121.205.209 0:0:0:0:0:ffff:4179:cdd1
65.121.205.210 0:0:0:0:0:ffff:4179:cdd2
65.121.205.211 0:0:0:0:0:ffff:4179:cdd3
65.121.205.212 0:0:0:0:0:ffff:4179:cdd4
65.121.205.213 0:0:0:0:0:ffff:4179:cdd5
65.121.205.214 0:0:0:0:0:ffff:4179:cdd6
65.121.205.215 0:0:0:0:0:ffff:4179:cdd7
65.121.205.216 0:0:0:0:0:ffff:4179:cdd8
65.121.205.217 0:0:0:0:0:ffff:4179:cdd9
65.121.205.218 0:0:0:0:0:ffff:4179:cdda
65.121.205.219 0:0:0:0:0:ffff:4179:cddb
65.121.205.220 0:0:0:0:0:ffff:4179:cddc
65.121.205.221 0:0:0:0:0:ffff:4179:cddd
65.121.205.222 0:0:0:0:0:ffff:4179:cdde
65.121.205.223 0:0:0:0:0:ffff:4179:cddf
65.121.205.224 0:0:0:0:0:ffff:4179:cde0
65.121.205.225 0:0:0:0:0:ffff:4179:cde1
65.121.205.226 0:0:0:0:0:ffff:4179:cde2
65.121.205.227 0:0:0:0:0:ffff:4179:cde3
65.121.205.228 0:0:0:0:0:ffff:4179:cde4
65.121.205.229 0:0:0:0:0:ffff:4179:cde5
65.121.205.230 0:0:0:0:0:ffff:4179:cde6
65.121.205.231 0:0:0:0:0:ffff:4179:cde7
65.121.205.232 0:0:0:0:0:ffff:4179:cde8
65.121.205.233 0:0:0:0:0:ffff:4179:cde9
65.121.205.234 0:0:0:0:0:ffff:4179:cdea
65.121.205.235 0:0:0:0:0:ffff:4179:cdeb
65.121.205.236 0:0:0:0:0:ffff:4179:cdec
65.121.205.237 0:0:0:0:0:ffff:4179:cded
65.121.205.238 0:0:0:0:0:ffff:4179:cdee
65.121.205.239 0:0:0:0:0:ffff:4179:cdef
65.121.205.240 0:0:0:0:0:ffff:4179:cdf0
65.121.205.241 0:0:0:0:0:ffff:4179:cdf1
65.121.205.242 0:0:0:0:0:ffff:4179:cdf2
65.121.205.243 0:0:0:0:0:ffff:4179:cdf3
65.121.205.244 0:0:0:0:0:ffff:4179:cdf4
65.121.205.245 0:0:0:0:0:ffff:4179:cdf5
65.121.205.246 0:0:0:0:0:ffff:4179:cdf6
65.121.205.247 0:0:0:0:0:ffff:4179:cdf7
65.121.205.248 0:0:0:0:0:ffff:4179:cdf8
65.121.205.249 0:0:0:0:0:ffff:4179:cdf9
65.121.205.250 0:0:0:0:0:ffff:4179:cdfa
65.121.205.251 0:0:0:0:0:ffff:4179:cdfb
65.121.205.252 0:0:0:0:0:ffff:4179:cdfc
65.121.205.253 0:0:0:0:0:ffff:4179:cdfd
65.121.205.254 0:0:0:0:0:ffff:4179:cdfe
65.121.205.255 0:0:0:0:0:ffff:4179:cdff


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.