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
197.129.121.1 0:0:0:0:0:ffff:c581:7901
197.129.121.2 0:0:0:0:0:ffff:c581:7902
197.129.121.3 0:0:0:0:0:ffff:c581:7903
197.129.121.4 0:0:0:0:0:ffff:c581:7904
197.129.121.5 0:0:0:0:0:ffff:c581:7905
197.129.121.6 0:0:0:0:0:ffff:c581:7906
197.129.121.7 0:0:0:0:0:ffff:c581:7907
197.129.121.8 0:0:0:0:0:ffff:c581:7908
197.129.121.9 0:0:0:0:0:ffff:c581:7909
197.129.121.10 0:0:0:0:0:ffff:c581:790a
197.129.121.11 0:0:0:0:0:ffff:c581:790b
197.129.121.12 0:0:0:0:0:ffff:c581:790c
197.129.121.13 0:0:0:0:0:ffff:c581:790d
197.129.121.14 0:0:0:0:0:ffff:c581:790e
197.129.121.15 0:0:0:0:0:ffff:c581:790f
197.129.121.16 0:0:0:0:0:ffff:c581:7910
197.129.121.17 0:0:0:0:0:ffff:c581:7911
197.129.121.18 0:0:0:0:0:ffff:c581:7912
197.129.121.19 0:0:0:0:0:ffff:c581:7913
197.129.121.20 0:0:0:0:0:ffff:c581:7914
197.129.121.21 0:0:0:0:0:ffff:c581:7915
197.129.121.22 0:0:0:0:0:ffff:c581:7916
197.129.121.23 0:0:0:0:0:ffff:c581:7917
197.129.121.24 0:0:0:0:0:ffff:c581:7918
197.129.121.25 0:0:0:0:0:ffff:c581:7919
197.129.121.26 0:0:0:0:0:ffff:c581:791a
197.129.121.27 0:0:0:0:0:ffff:c581:791b
197.129.121.28 0:0:0:0:0:ffff:c581:791c
197.129.121.29 0:0:0:0:0:ffff:c581:791d
197.129.121.30 0:0:0:0:0:ffff:c581:791e
197.129.121.31 0:0:0:0:0:ffff:c581:791f
197.129.121.32 0:0:0:0:0:ffff:c581:7920
197.129.121.33 0:0:0:0:0:ffff:c581:7921
197.129.121.34 0:0:0:0:0:ffff:c581:7922
197.129.121.35 0:0:0:0:0:ffff:c581:7923
197.129.121.36 0:0:0:0:0:ffff:c581:7924
197.129.121.37 0:0:0:0:0:ffff:c581:7925
197.129.121.38 0:0:0:0:0:ffff:c581:7926
197.129.121.39 0:0:0:0:0:ffff:c581:7927
197.129.121.40 0:0:0:0:0:ffff:c581:7928
197.129.121.41 0:0:0:0:0:ffff:c581:7929
197.129.121.42 0:0:0:0:0:ffff:c581:792a
197.129.121.43 0:0:0:0:0:ffff:c581:792b
197.129.121.44 0:0:0:0:0:ffff:c581:792c
197.129.121.45 0:0:0:0:0:ffff:c581:792d
197.129.121.46 0:0:0:0:0:ffff:c581:792e
197.129.121.47 0:0:0:0:0:ffff:c581:792f
197.129.121.48 0:0:0:0:0:ffff:c581:7930
197.129.121.49 0:0:0:0:0:ffff:c581:7931
197.129.121.50 0:0:0:0:0:ffff:c581:7932
197.129.121.51 0:0:0:0:0:ffff:c581:7933
197.129.121.52 0:0:0:0:0:ffff:c581:7934
197.129.121.53 0:0:0:0:0:ffff:c581:7935
197.129.121.54 0:0:0:0:0:ffff:c581:7936
197.129.121.55 0:0:0:0:0:ffff:c581:7937
197.129.121.56 0:0:0:0:0:ffff:c581:7938
197.129.121.57 0:0:0:0:0:ffff:c581:7939
197.129.121.58 0:0:0:0:0:ffff:c581:793a
197.129.121.59 0:0:0:0:0:ffff:c581:793b
197.129.121.60 0:0:0:0:0:ffff:c581:793c


197.129.121.61 0:0:0:0:0:ffff:c581:793d
197.129.121.62 0:0:0:0:0:ffff:c581:793e
197.129.121.63 0:0:0:0:0:ffff:c581:793f
197.129.121.64 0:0:0:0:0:ffff:c581:7940
197.129.121.65 0:0:0:0:0:ffff:c581:7941
197.129.121.66 0:0:0:0:0:ffff:c581:7942
197.129.121.67 0:0:0:0:0:ffff:c581:7943
197.129.121.68 0:0:0:0:0:ffff:c581:7944
197.129.121.69 0:0:0:0:0:ffff:c581:7945
197.129.121.70 0:0:0:0:0:ffff:c581:7946
197.129.121.71 0:0:0:0:0:ffff:c581:7947
197.129.121.72 0:0:0:0:0:ffff:c581:7948
197.129.121.73 0:0:0:0:0:ffff:c581:7949
197.129.121.74 0:0:0:0:0:ffff:c581:794a
197.129.121.75 0:0:0:0:0:ffff:c581:794b
197.129.121.76 0:0:0:0:0:ffff:c581:794c
197.129.121.77 0:0:0:0:0:ffff:c581:794d
197.129.121.78 0:0:0:0:0:ffff:c581:794e
197.129.121.79 0:0:0:0:0:ffff:c581:794f
197.129.121.80 0:0:0:0:0:ffff:c581:7950
197.129.121.81 0:0:0:0:0:ffff:c581:7951
197.129.121.82 0:0:0:0:0:ffff:c581:7952
197.129.121.83 0:0:0:0:0:ffff:c581:7953
197.129.121.84 0:0:0:0:0:ffff:c581:7954
197.129.121.85 0:0:0:0:0:ffff:c581:7955
197.129.121.86 0:0:0:0:0:ffff:c581:7956
197.129.121.87 0:0:0:0:0:ffff:c581:7957
197.129.121.88 0:0:0:0:0:ffff:c581:7958
197.129.121.89 0:0:0:0:0:ffff:c581:7959
197.129.121.90 0:0:0:0:0:ffff:c581:795a
197.129.121.91 0:0:0:0:0:ffff:c581:795b
197.129.121.92 0:0:0:0:0:ffff:c581:795c
197.129.121.93 0:0:0:0:0:ffff:c581:795d
197.129.121.94 0:0:0:0:0:ffff:c581:795e
197.129.121.95 0:0:0:0:0:ffff:c581:795f
197.129.121.96 0:0:0:0:0:ffff:c581:7960
197.129.121.97 0:0:0:0:0:ffff:c581:7961
197.129.121.98 0:0:0:0:0:ffff:c581:7962
197.129.121.99 0:0:0:0:0:ffff:c581:7963
197.129.121.100 0:0:0:0:0:ffff:c581:7964
197.129.121.101 0:0:0:0:0:ffff:c581:7965
197.129.121.102 0:0:0:0:0:ffff:c581:7966
197.129.121.103 0:0:0:0:0:ffff:c581:7967
197.129.121.104 0:0:0:0:0:ffff:c581:7968
197.129.121.105 0:0:0:0:0:ffff:c581:7969
197.129.121.106 0:0:0:0:0:ffff:c581:796a
197.129.121.107 0:0:0:0:0:ffff:c581:796b
197.129.121.108 0:0:0:0:0:ffff:c581:796c
197.129.121.109 0:0:0:0:0:ffff:c581:796d
197.129.121.110 0:0:0:0:0:ffff:c581:796e
197.129.121.111 0:0:0:0:0:ffff:c581:796f
197.129.121.112 0:0:0:0:0:ffff:c581:7970
197.129.121.113 0:0:0:0:0:ffff:c581:7971
197.129.121.114 0:0:0:0:0:ffff:c581:7972
197.129.121.115 0:0:0:0:0:ffff:c581:7973
197.129.121.116 0:0:0:0:0:ffff:c581:7974
197.129.121.117 0:0:0:0:0:ffff:c581:7975
197.129.121.118 0:0:0:0:0:ffff:c581:7976
197.129.121.119 0:0:0:0:0:ffff:c581:7977
197.129.121.120 0:0:0:0:0:ffff:c581:7978


197.129.121.121 0:0:0:0:0:ffff:c581:7979
197.129.121.122 0:0:0:0:0:ffff:c581:797a
197.129.121.123 0:0:0:0:0:ffff:c581:797b
197.129.121.124 0:0:0:0:0:ffff:c581:797c
197.129.121.125 0:0:0:0:0:ffff:c581:797d
197.129.121.126 0:0:0:0:0:ffff:c581:797e
197.129.121.127 0:0:0:0:0:ffff:c581:797f
197.129.121.128 0:0:0:0:0:ffff:c581:7980
197.129.121.129 0:0:0:0:0:ffff:c581:7981
197.129.121.130 0:0:0:0:0:ffff:c581:7982
197.129.121.131 0:0:0:0:0:ffff:c581:7983
197.129.121.132 0:0:0:0:0:ffff:c581:7984
197.129.121.133 0:0:0:0:0:ffff:c581:7985
197.129.121.134 0:0:0:0:0:ffff:c581:7986
197.129.121.135 0:0:0:0:0:ffff:c581:7987
197.129.121.136 0:0:0:0:0:ffff:c581:7988
197.129.121.137 0:0:0:0:0:ffff:c581:7989
197.129.121.138 0:0:0:0:0:ffff:c581:798a
197.129.121.139 0:0:0:0:0:ffff:c581:798b
197.129.121.140 0:0:0:0:0:ffff:c581:798c
197.129.121.141 0:0:0:0:0:ffff:c581:798d
197.129.121.142 0:0:0:0:0:ffff:c581:798e
197.129.121.143 0:0:0:0:0:ffff:c581:798f
197.129.121.144 0:0:0:0:0:ffff:c581:7990
197.129.121.145 0:0:0:0:0:ffff:c581:7991
197.129.121.146 0:0:0:0:0:ffff:c581:7992
197.129.121.147 0:0:0:0:0:ffff:c581:7993
197.129.121.148 0:0:0:0:0:ffff:c581:7994
197.129.121.149 0:0:0:0:0:ffff:c581:7995
197.129.121.150 0:0:0:0:0:ffff:c581:7996
197.129.121.151 0:0:0:0:0:ffff:c581:7997
197.129.121.152 0:0:0:0:0:ffff:c581:7998
197.129.121.153 0:0:0:0:0:ffff:c581:7999
197.129.121.154 0:0:0:0:0:ffff:c581:799a
197.129.121.155 0:0:0:0:0:ffff:c581:799b
197.129.121.156 0:0:0:0:0:ffff:c581:799c
197.129.121.157 0:0:0:0:0:ffff:c581:799d
197.129.121.158 0:0:0:0:0:ffff:c581:799e
197.129.121.159 0:0:0:0:0:ffff:c581:799f
197.129.121.160 0:0:0:0:0:ffff:c581:79a0
197.129.121.161 0:0:0:0:0:ffff:c581:79a1
197.129.121.162 0:0:0:0:0:ffff:c581:79a2
197.129.121.163 0:0:0:0:0:ffff:c581:79a3
197.129.121.164 0:0:0:0:0:ffff:c581:79a4
197.129.121.165 0:0:0:0:0:ffff:c581:79a5
197.129.121.166 0:0:0:0:0:ffff:c581:79a6
197.129.121.167 0:0:0:0:0:ffff:c581:79a7
197.129.121.168 0:0:0:0:0:ffff:c581:79a8
197.129.121.169 0:0:0:0:0:ffff:c581:79a9
197.129.121.170 0:0:0:0:0:ffff:c581:79aa
197.129.121.171 0:0:0:0:0:ffff:c581:79ab
197.129.121.172 0:0:0:0:0:ffff:c581:79ac
197.129.121.173 0:0:0:0:0:ffff:c581:79ad
197.129.121.174 0:0:0:0:0:ffff:c581:79ae
197.129.121.175 0:0:0:0:0:ffff:c581:79af
197.129.121.176 0:0:0:0:0:ffff:c581:79b0
197.129.121.177 0:0:0:0:0:ffff:c581:79b1
197.129.121.178 0:0:0:0:0:ffff:c581:79b2
197.129.121.179 0:0:0:0:0:ffff:c581:79b3
197.129.121.180 0:0:0:0:0:ffff:c581:79b4


197.129.121.181 0:0:0:0:0:ffff:c581:79b5
197.129.121.182 0:0:0:0:0:ffff:c581:79b6
197.129.121.183 0:0:0:0:0:ffff:c581:79b7
197.129.121.184 0:0:0:0:0:ffff:c581:79b8
197.129.121.185 0:0:0:0:0:ffff:c581:79b9
197.129.121.186 0:0:0:0:0:ffff:c581:79ba
197.129.121.187 0:0:0:0:0:ffff:c581:79bb
197.129.121.188 0:0:0:0:0:ffff:c581:79bc
197.129.121.189 0:0:0:0:0:ffff:c581:79bd
197.129.121.190 0:0:0:0:0:ffff:c581:79be
197.129.121.191 0:0:0:0:0:ffff:c581:79bf
197.129.121.192 0:0:0:0:0:ffff:c581:79c0
197.129.121.193 0:0:0:0:0:ffff:c581:79c1
197.129.121.194 0:0:0:0:0:ffff:c581:79c2
197.129.121.195 0:0:0:0:0:ffff:c581:79c3
197.129.121.196 0:0:0:0:0:ffff:c581:79c4
197.129.121.197 0:0:0:0:0:ffff:c581:79c5
197.129.121.198 0:0:0:0:0:ffff:c581:79c6
197.129.121.199 0:0:0:0:0:ffff:c581:79c7
197.129.121.200 0:0:0:0:0:ffff:c581:79c8
197.129.121.201 0:0:0:0:0:ffff:c581:79c9
197.129.121.202 0:0:0:0:0:ffff:c581:79ca
197.129.121.203 0:0:0:0:0:ffff:c581:79cb
197.129.121.204 0:0:0:0:0:ffff:c581:79cc
197.129.121.205 0:0:0:0:0:ffff:c581:79cd
197.129.121.206 0:0:0:0:0:ffff:c581:79ce
197.129.121.207 0:0:0:0:0:ffff:c581:79cf
197.129.121.208 0:0:0:0:0:ffff:c581:79d0
197.129.121.209 0:0:0:0:0:ffff:c581:79d1
197.129.121.210 0:0:0:0:0:ffff:c581:79d2
197.129.121.211 0:0:0:0:0:ffff:c581:79d3
197.129.121.212 0:0:0:0:0:ffff:c581:79d4
197.129.121.213 0:0:0:0:0:ffff:c581:79d5
197.129.121.214 0:0:0:0:0:ffff:c581:79d6
197.129.121.215 0:0:0:0:0:ffff:c581:79d7
197.129.121.216 0:0:0:0:0:ffff:c581:79d8
197.129.121.217 0:0:0:0:0:ffff:c581:79d9
197.129.121.218 0:0:0:0:0:ffff:c581:79da
197.129.121.219 0:0:0:0:0:ffff:c581:79db
197.129.121.220 0:0:0:0:0:ffff:c581:79dc
197.129.121.221 0:0:0:0:0:ffff:c581:79dd
197.129.121.222 0:0:0:0:0:ffff:c581:79de
197.129.121.223 0:0:0:0:0:ffff:c581:79df
197.129.121.224 0:0:0:0:0:ffff:c581:79e0
197.129.121.225 0:0:0:0:0:ffff:c581:79e1
197.129.121.226 0:0:0:0:0:ffff:c581:79e2
197.129.121.227 0:0:0:0:0:ffff:c581:79e3
197.129.121.228 0:0:0:0:0:ffff:c581:79e4
197.129.121.229 0:0:0:0:0:ffff:c581:79e5
197.129.121.230 0:0:0:0:0:ffff:c581:79e6
197.129.121.231 0:0:0:0:0:ffff:c581:79e7
197.129.121.232 0:0:0:0:0:ffff:c581:79e8
197.129.121.233 0:0:0:0:0:ffff:c581:79e9
197.129.121.234 0:0:0:0:0:ffff:c581:79ea
197.129.121.235 0:0:0:0:0:ffff:c581:79eb
197.129.121.236 0:0:0:0:0:ffff:c581:79ec
197.129.121.237 0:0:0:0:0:ffff:c581:79ed
197.129.121.238 0:0:0:0:0:ffff:c581:79ee
197.129.121.239 0:0:0:0:0:ffff:c581:79ef
197.129.121.240 0:0:0:0:0:ffff:c581:79f0
197.129.121.241 0:0:0:0:0:ffff:c581:79f1
197.129.121.242 0:0:0:0:0:ffff:c581:79f2
197.129.121.243 0:0:0:0:0:ffff:c581:79f3
197.129.121.244 0:0:0:0:0:ffff:c581:79f4
197.129.121.245 0:0:0:0:0:ffff:c581:79f5
197.129.121.246 0:0:0:0:0:ffff:c581:79f6
197.129.121.247 0:0:0:0:0:ffff:c581:79f7
197.129.121.248 0:0:0:0:0:ffff:c581:79f8
197.129.121.249 0:0:0:0:0:ffff:c581:79f9
197.129.121.250 0:0:0:0:0:ffff:c581:79fa
197.129.121.251 0:0:0:0:0:ffff:c581:79fb
197.129.121.252 0:0:0:0:0:ffff:c581:79fc
197.129.121.253 0:0:0:0:0:ffff:c581:79fd
197.129.121.254 0:0:0:0:0:ffff:c581:79fe
197.129.121.255 0:0:0:0:0:ffff:c581:79ff


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.