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
65.121.121.1 0:0:0:0:0:ffff:4179:7901
65.121.121.2 0:0:0:0:0:ffff:4179:7902
65.121.121.3 0:0:0:0:0:ffff:4179:7903
65.121.121.4 0:0:0:0:0:ffff:4179:7904
65.121.121.5 0:0:0:0:0:ffff:4179:7905
65.121.121.6 0:0:0:0:0:ffff:4179:7906
65.121.121.7 0:0:0:0:0:ffff:4179:7907
65.121.121.8 0:0:0:0:0:ffff:4179:7908
65.121.121.9 0:0:0:0:0:ffff:4179:7909
65.121.121.10 0:0:0:0:0:ffff:4179:790a
65.121.121.11 0:0:0:0:0:ffff:4179:790b
65.121.121.12 0:0:0:0:0:ffff:4179:790c
65.121.121.13 0:0:0:0:0:ffff:4179:790d
65.121.121.14 0:0:0:0:0:ffff:4179:790e
65.121.121.15 0:0:0:0:0:ffff:4179:790f
65.121.121.16 0:0:0:0:0:ffff:4179:7910
65.121.121.17 0:0:0:0:0:ffff:4179:7911
65.121.121.18 0:0:0:0:0:ffff:4179:7912
65.121.121.19 0:0:0:0:0:ffff:4179:7913
65.121.121.20 0:0:0:0:0:ffff:4179:7914
65.121.121.21 0:0:0:0:0:ffff:4179:7915
65.121.121.22 0:0:0:0:0:ffff:4179:7916
65.121.121.23 0:0:0:0:0:ffff:4179:7917
65.121.121.24 0:0:0:0:0:ffff:4179:7918
65.121.121.25 0:0:0:0:0:ffff:4179:7919
65.121.121.26 0:0:0:0:0:ffff:4179:791a
65.121.121.27 0:0:0:0:0:ffff:4179:791b
65.121.121.28 0:0:0:0:0:ffff:4179:791c
65.121.121.29 0:0:0:0:0:ffff:4179:791d
65.121.121.30 0:0:0:0:0:ffff:4179:791e
65.121.121.31 0:0:0:0:0:ffff:4179:791f
65.121.121.32 0:0:0:0:0:ffff:4179:7920
65.121.121.33 0:0:0:0:0:ffff:4179:7921
65.121.121.34 0:0:0:0:0:ffff:4179:7922
65.121.121.35 0:0:0:0:0:ffff:4179:7923
65.121.121.36 0:0:0:0:0:ffff:4179:7924
65.121.121.37 0:0:0:0:0:ffff:4179:7925
65.121.121.38 0:0:0:0:0:ffff:4179:7926
65.121.121.39 0:0:0:0:0:ffff:4179:7927
65.121.121.40 0:0:0:0:0:ffff:4179:7928
65.121.121.41 0:0:0:0:0:ffff:4179:7929
65.121.121.42 0:0:0:0:0:ffff:4179:792a
65.121.121.43 0:0:0:0:0:ffff:4179:792b
65.121.121.44 0:0:0:0:0:ffff:4179:792c
65.121.121.45 0:0:0:0:0:ffff:4179:792d
65.121.121.46 0:0:0:0:0:ffff:4179:792e
65.121.121.47 0:0:0:0:0:ffff:4179:792f
65.121.121.48 0:0:0:0:0:ffff:4179:7930
65.121.121.49 0:0:0:0:0:ffff:4179:7931
65.121.121.50 0:0:0:0:0:ffff:4179:7932
65.121.121.51 0:0:0:0:0:ffff:4179:7933
65.121.121.52 0:0:0:0:0:ffff:4179:7934
65.121.121.53 0:0:0:0:0:ffff:4179:7935
65.121.121.54 0:0:0:0:0:ffff:4179:7936
65.121.121.55 0:0:0:0:0:ffff:4179:7937
65.121.121.56 0:0:0:0:0:ffff:4179:7938
65.121.121.57 0:0:0:0:0:ffff:4179:7939
65.121.121.58 0:0:0:0:0:ffff:4179:793a
65.121.121.59 0:0:0:0:0:ffff:4179:793b
65.121.121.60 0:0:0:0:0:ffff:4179:793c


65.121.121.61 0:0:0:0:0:ffff:4179:793d
65.121.121.62 0:0:0:0:0:ffff:4179:793e
65.121.121.63 0:0:0:0:0:ffff:4179:793f
65.121.121.64 0:0:0:0:0:ffff:4179:7940
65.121.121.65 0:0:0:0:0:ffff:4179:7941
65.121.121.66 0:0:0:0:0:ffff:4179:7942
65.121.121.67 0:0:0:0:0:ffff:4179:7943
65.121.121.68 0:0:0:0:0:ffff:4179:7944
65.121.121.69 0:0:0:0:0:ffff:4179:7945
65.121.121.70 0:0:0:0:0:ffff:4179:7946
65.121.121.71 0:0:0:0:0:ffff:4179:7947
65.121.121.72 0:0:0:0:0:ffff:4179:7948
65.121.121.73 0:0:0:0:0:ffff:4179:7949
65.121.121.74 0:0:0:0:0:ffff:4179:794a
65.121.121.75 0:0:0:0:0:ffff:4179:794b
65.121.121.76 0:0:0:0:0:ffff:4179:794c
65.121.121.77 0:0:0:0:0:ffff:4179:794d
65.121.121.78 0:0:0:0:0:ffff:4179:794e
65.121.121.79 0:0:0:0:0:ffff:4179:794f
65.121.121.80 0:0:0:0:0:ffff:4179:7950
65.121.121.81 0:0:0:0:0:ffff:4179:7951
65.121.121.82 0:0:0:0:0:ffff:4179:7952
65.121.121.83 0:0:0:0:0:ffff:4179:7953
65.121.121.84 0:0:0:0:0:ffff:4179:7954
65.121.121.85 0:0:0:0:0:ffff:4179:7955
65.121.121.86 0:0:0:0:0:ffff:4179:7956
65.121.121.87 0:0:0:0:0:ffff:4179:7957
65.121.121.88 0:0:0:0:0:ffff:4179:7958
65.121.121.89 0:0:0:0:0:ffff:4179:7959
65.121.121.90 0:0:0:0:0:ffff:4179:795a
65.121.121.91 0:0:0:0:0:ffff:4179:795b
65.121.121.92 0:0:0:0:0:ffff:4179:795c
65.121.121.93 0:0:0:0:0:ffff:4179:795d
65.121.121.94 0:0:0:0:0:ffff:4179:795e
65.121.121.95 0:0:0:0:0:ffff:4179:795f
65.121.121.96 0:0:0:0:0:ffff:4179:7960
65.121.121.97 0:0:0:0:0:ffff:4179:7961
65.121.121.98 0:0:0:0:0:ffff:4179:7962
65.121.121.99 0:0:0:0:0:ffff:4179:7963
65.121.121.100 0:0:0:0:0:ffff:4179:7964
65.121.121.101 0:0:0:0:0:ffff:4179:7965
65.121.121.102 0:0:0:0:0:ffff:4179:7966
65.121.121.103 0:0:0:0:0:ffff:4179:7967
65.121.121.104 0:0:0:0:0:ffff:4179:7968
65.121.121.105 0:0:0:0:0:ffff:4179:7969
65.121.121.106 0:0:0:0:0:ffff:4179:796a
65.121.121.107 0:0:0:0:0:ffff:4179:796b
65.121.121.108 0:0:0:0:0:ffff:4179:796c
65.121.121.109 0:0:0:0:0:ffff:4179:796d
65.121.121.110 0:0:0:0:0:ffff:4179:796e
65.121.121.111 0:0:0:0:0:ffff:4179:796f
65.121.121.112 0:0:0:0:0:ffff:4179:7970
65.121.121.113 0:0:0:0:0:ffff:4179:7971
65.121.121.114 0:0:0:0:0:ffff:4179:7972
65.121.121.115 0:0:0:0:0:ffff:4179:7973
65.121.121.116 0:0:0:0:0:ffff:4179:7974
65.121.121.117 0:0:0:0:0:ffff:4179:7975
65.121.121.118 0:0:0:0:0:ffff:4179:7976
65.121.121.119 0:0:0:0:0:ffff:4179:7977
65.121.121.120 0:0:0:0:0:ffff:4179:7978


65.121.121.121 0:0:0:0:0:ffff:4179:7979
65.121.121.122 0:0:0:0:0:ffff:4179:797a
65.121.121.123 0:0:0:0:0:ffff:4179:797b
65.121.121.124 0:0:0:0:0:ffff:4179:797c
65.121.121.125 0:0:0:0:0:ffff:4179:797d
65.121.121.126 0:0:0:0:0:ffff:4179:797e
65.121.121.127 0:0:0:0:0:ffff:4179:797f
65.121.121.128 0:0:0:0:0:ffff:4179:7980
65.121.121.129 0:0:0:0:0:ffff:4179:7981
65.121.121.130 0:0:0:0:0:ffff:4179:7982
65.121.121.131 0:0:0:0:0:ffff:4179:7983
65.121.121.132 0:0:0:0:0:ffff:4179:7984
65.121.121.133 0:0:0:0:0:ffff:4179:7985
65.121.121.134 0:0:0:0:0:ffff:4179:7986
65.121.121.135 0:0:0:0:0:ffff:4179:7987
65.121.121.136 0:0:0:0:0:ffff:4179:7988
65.121.121.137 0:0:0:0:0:ffff:4179:7989
65.121.121.138 0:0:0:0:0:ffff:4179:798a
65.121.121.139 0:0:0:0:0:ffff:4179:798b
65.121.121.140 0:0:0:0:0:ffff:4179:798c
65.121.121.141 0:0:0:0:0:ffff:4179:798d
65.121.121.142 0:0:0:0:0:ffff:4179:798e
65.121.121.143 0:0:0:0:0:ffff:4179:798f
65.121.121.144 0:0:0:0:0:ffff:4179:7990
65.121.121.145 0:0:0:0:0:ffff:4179:7991
65.121.121.146 0:0:0:0:0:ffff:4179:7992
65.121.121.147 0:0:0:0:0:ffff:4179:7993
65.121.121.148 0:0:0:0:0:ffff:4179:7994
65.121.121.149 0:0:0:0:0:ffff:4179:7995
65.121.121.150 0:0:0:0:0:ffff:4179:7996
65.121.121.151 0:0:0:0:0:ffff:4179:7997
65.121.121.152 0:0:0:0:0:ffff:4179:7998
65.121.121.153 0:0:0:0:0:ffff:4179:7999
65.121.121.154 0:0:0:0:0:ffff:4179:799a
65.121.121.155 0:0:0:0:0:ffff:4179:799b
65.121.121.156 0:0:0:0:0:ffff:4179:799c
65.121.121.157 0:0:0:0:0:ffff:4179:799d
65.121.121.158 0:0:0:0:0:ffff:4179:799e
65.121.121.159 0:0:0:0:0:ffff:4179:799f
65.121.121.160 0:0:0:0:0:ffff:4179:79a0
65.121.121.161 0:0:0:0:0:ffff:4179:79a1
65.121.121.162 0:0:0:0:0:ffff:4179:79a2
65.121.121.163 0:0:0:0:0:ffff:4179:79a3
65.121.121.164 0:0:0:0:0:ffff:4179:79a4
65.121.121.165 0:0:0:0:0:ffff:4179:79a5
65.121.121.166 0:0:0:0:0:ffff:4179:79a6
65.121.121.167 0:0:0:0:0:ffff:4179:79a7
65.121.121.168 0:0:0:0:0:ffff:4179:79a8
65.121.121.169 0:0:0:0:0:ffff:4179:79a9
65.121.121.170 0:0:0:0:0:ffff:4179:79aa
65.121.121.171 0:0:0:0:0:ffff:4179:79ab
65.121.121.172 0:0:0:0:0:ffff:4179:79ac
65.121.121.173 0:0:0:0:0:ffff:4179:79ad
65.121.121.174 0:0:0:0:0:ffff:4179:79ae
65.121.121.175 0:0:0:0:0:ffff:4179:79af
65.121.121.176 0:0:0:0:0:ffff:4179:79b0
65.121.121.177 0:0:0:0:0:ffff:4179:79b1
65.121.121.178 0:0:0:0:0:ffff:4179:79b2
65.121.121.179 0:0:0:0:0:ffff:4179:79b3
65.121.121.180 0:0:0:0:0:ffff:4179:79b4


65.121.121.181 0:0:0:0:0:ffff:4179:79b5
65.121.121.182 0:0:0:0:0:ffff:4179:79b6
65.121.121.183 0:0:0:0:0:ffff:4179:79b7
65.121.121.184 0:0:0:0:0:ffff:4179:79b8
65.121.121.185 0:0:0:0:0:ffff:4179:79b9
65.121.121.186 0:0:0:0:0:ffff:4179:79ba
65.121.121.187 0:0:0:0:0:ffff:4179:79bb
65.121.121.188 0:0:0:0:0:ffff:4179:79bc
65.121.121.189 0:0:0:0:0:ffff:4179:79bd
65.121.121.190 0:0:0:0:0:ffff:4179:79be
65.121.121.191 0:0:0:0:0:ffff:4179:79bf
65.121.121.192 0:0:0:0:0:ffff:4179:79c0
65.121.121.193 0:0:0:0:0:ffff:4179:79c1
65.121.121.194 0:0:0:0:0:ffff:4179:79c2
65.121.121.195 0:0:0:0:0:ffff:4179:79c3
65.121.121.196 0:0:0:0:0:ffff:4179:79c4
65.121.121.197 0:0:0:0:0:ffff:4179:79c5
65.121.121.198 0:0:0:0:0:ffff:4179:79c6
65.121.121.199 0:0:0:0:0:ffff:4179:79c7
65.121.121.200 0:0:0:0:0:ffff:4179:79c8
65.121.121.201 0:0:0:0:0:ffff:4179:79c9
65.121.121.202 0:0:0:0:0:ffff:4179:79ca
65.121.121.203 0:0:0:0:0:ffff:4179:79cb
65.121.121.204 0:0:0:0:0:ffff:4179:79cc
65.121.121.205 0:0:0:0:0:ffff:4179:79cd
65.121.121.206 0:0:0:0:0:ffff:4179:79ce
65.121.121.207 0:0:0:0:0:ffff:4179:79cf
65.121.121.208 0:0:0:0:0:ffff:4179:79d0
65.121.121.209 0:0:0:0:0:ffff:4179:79d1
65.121.121.210 0:0:0:0:0:ffff:4179:79d2
65.121.121.211 0:0:0:0:0:ffff:4179:79d3
65.121.121.212 0:0:0:0:0:ffff:4179:79d4
65.121.121.213 0:0:0:0:0:ffff:4179:79d5
65.121.121.214 0:0:0:0:0:ffff:4179:79d6
65.121.121.215 0:0:0:0:0:ffff:4179:79d7
65.121.121.216 0:0:0:0:0:ffff:4179:79d8
65.121.121.217 0:0:0:0:0:ffff:4179:79d9
65.121.121.218 0:0:0:0:0:ffff:4179:79da
65.121.121.219 0:0:0:0:0:ffff:4179:79db
65.121.121.220 0:0:0:0:0:ffff:4179:79dc
65.121.121.221 0:0:0:0:0:ffff:4179:79dd
65.121.121.222 0:0:0:0:0:ffff:4179:79de
65.121.121.223 0:0:0:0:0:ffff:4179:79df
65.121.121.224 0:0:0:0:0:ffff:4179:79e0
65.121.121.225 0:0:0:0:0:ffff:4179:79e1
65.121.121.226 0:0:0:0:0:ffff:4179:79e2
65.121.121.227 0:0:0:0:0:ffff:4179:79e3
65.121.121.228 0:0:0:0:0:ffff:4179:79e4
65.121.121.229 0:0:0:0:0:ffff:4179:79e5
65.121.121.230 0:0:0:0:0:ffff:4179:79e6
65.121.121.231 0:0:0:0:0:ffff:4179:79e7
65.121.121.232 0:0:0:0:0:ffff:4179:79e8
65.121.121.233 0:0:0:0:0:ffff:4179:79e9
65.121.121.234 0:0:0:0:0:ffff:4179:79ea
65.121.121.235 0:0:0:0:0:ffff:4179:79eb
65.121.121.236 0:0:0:0:0:ffff:4179:79ec
65.121.121.237 0:0:0:0:0:ffff:4179:79ed
65.121.121.238 0:0:0:0:0:ffff:4179:79ee
65.121.121.239 0:0:0:0:0:ffff:4179:79ef
65.121.121.240 0:0:0:0:0:ffff:4179:79f0
65.121.121.241 0:0:0:0:0:ffff:4179:79f1
65.121.121.242 0:0:0:0:0:ffff:4179:79f2
65.121.121.243 0:0:0:0:0:ffff:4179:79f3
65.121.121.244 0:0:0:0:0:ffff:4179:79f4
65.121.121.245 0:0:0:0:0:ffff:4179:79f5
65.121.121.246 0:0:0:0:0:ffff:4179:79f6
65.121.121.247 0:0:0:0:0:ffff:4179:79f7
65.121.121.248 0:0:0:0:0:ffff:4179:79f8
65.121.121.249 0:0:0:0:0:ffff:4179:79f9
65.121.121.250 0:0:0:0:0:ffff:4179:79fa
65.121.121.251 0:0:0:0:0:ffff:4179:79fb
65.121.121.252 0:0:0:0:0:ffff:4179:79fc
65.121.121.253 0:0:0:0:0:ffff:4179:79fd
65.121.121.254 0:0:0:0:0:ffff:4179:79fe
65.121.121.255 0:0:0:0:0:ffff:4179:79ff


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.