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
166.90.21.1 0:0:0:0:0:ffff:a65a:1501
166.90.21.2 0:0:0:0:0:ffff:a65a:1502
166.90.21.3 0:0:0:0:0:ffff:a65a:1503
166.90.21.4 0:0:0:0:0:ffff:a65a:1504
166.90.21.5 0:0:0:0:0:ffff:a65a:1505
166.90.21.6 0:0:0:0:0:ffff:a65a:1506
166.90.21.7 0:0:0:0:0:ffff:a65a:1507
166.90.21.8 0:0:0:0:0:ffff:a65a:1508
166.90.21.9 0:0:0:0:0:ffff:a65a:1509
166.90.21.10 0:0:0:0:0:ffff:a65a:150a
166.90.21.11 0:0:0:0:0:ffff:a65a:150b
166.90.21.12 0:0:0:0:0:ffff:a65a:150c
166.90.21.13 0:0:0:0:0:ffff:a65a:150d
166.90.21.14 0:0:0:0:0:ffff:a65a:150e
166.90.21.15 0:0:0:0:0:ffff:a65a:150f
166.90.21.16 0:0:0:0:0:ffff:a65a:1510
166.90.21.17 0:0:0:0:0:ffff:a65a:1511
166.90.21.18 0:0:0:0:0:ffff:a65a:1512
166.90.21.19 0:0:0:0:0:ffff:a65a:1513
166.90.21.20 0:0:0:0:0:ffff:a65a:1514
166.90.21.21 0:0:0:0:0:ffff:a65a:1515
166.90.21.22 0:0:0:0:0:ffff:a65a:1516
166.90.21.23 0:0:0:0:0:ffff:a65a:1517
166.90.21.24 0:0:0:0:0:ffff:a65a:1518
166.90.21.25 0:0:0:0:0:ffff:a65a:1519
166.90.21.26 0:0:0:0:0:ffff:a65a:151a
166.90.21.27 0:0:0:0:0:ffff:a65a:151b
166.90.21.28 0:0:0:0:0:ffff:a65a:151c
166.90.21.29 0:0:0:0:0:ffff:a65a:151d
166.90.21.30 0:0:0:0:0:ffff:a65a:151e
166.90.21.31 0:0:0:0:0:ffff:a65a:151f
166.90.21.32 0:0:0:0:0:ffff:a65a:1520
166.90.21.33 0:0:0:0:0:ffff:a65a:1521
166.90.21.34 0:0:0:0:0:ffff:a65a:1522
166.90.21.35 0:0:0:0:0:ffff:a65a:1523
166.90.21.36 0:0:0:0:0:ffff:a65a:1524
166.90.21.37 0:0:0:0:0:ffff:a65a:1525
166.90.21.38 0:0:0:0:0:ffff:a65a:1526
166.90.21.39 0:0:0:0:0:ffff:a65a:1527
166.90.21.40 0:0:0:0:0:ffff:a65a:1528
166.90.21.41 0:0:0:0:0:ffff:a65a:1529
166.90.21.42 0:0:0:0:0:ffff:a65a:152a
166.90.21.43 0:0:0:0:0:ffff:a65a:152b
166.90.21.44 0:0:0:0:0:ffff:a65a:152c
166.90.21.45 0:0:0:0:0:ffff:a65a:152d
166.90.21.46 0:0:0:0:0:ffff:a65a:152e
166.90.21.47 0:0:0:0:0:ffff:a65a:152f
166.90.21.48 0:0:0:0:0:ffff:a65a:1530
166.90.21.49 0:0:0:0:0:ffff:a65a:1531
166.90.21.50 0:0:0:0:0:ffff:a65a:1532
166.90.21.51 0:0:0:0:0:ffff:a65a:1533
166.90.21.52 0:0:0:0:0:ffff:a65a:1534
166.90.21.53 0:0:0:0:0:ffff:a65a:1535
166.90.21.54 0:0:0:0:0:ffff:a65a:1536
166.90.21.55 0:0:0:0:0:ffff:a65a:1537
166.90.21.56 0:0:0:0:0:ffff:a65a:1538
166.90.21.57 0:0:0:0:0:ffff:a65a:1539
166.90.21.58 0:0:0:0:0:ffff:a65a:153a
166.90.21.59 0:0:0:0:0:ffff:a65a:153b
166.90.21.60 0:0:0:0:0:ffff:a65a:153c


166.90.21.61 0:0:0:0:0:ffff:a65a:153d
166.90.21.62 0:0:0:0:0:ffff:a65a:153e
166.90.21.63 0:0:0:0:0:ffff:a65a:153f
166.90.21.64 0:0:0:0:0:ffff:a65a:1540
166.90.21.65 0:0:0:0:0:ffff:a65a:1541
166.90.21.66 0:0:0:0:0:ffff:a65a:1542
166.90.21.67 0:0:0:0:0:ffff:a65a:1543
166.90.21.68 0:0:0:0:0:ffff:a65a:1544
166.90.21.69 0:0:0:0:0:ffff:a65a:1545
166.90.21.70 0:0:0:0:0:ffff:a65a:1546
166.90.21.71 0:0:0:0:0:ffff:a65a:1547
166.90.21.72 0:0:0:0:0:ffff:a65a:1548
166.90.21.73 0:0:0:0:0:ffff:a65a:1549
166.90.21.74 0:0:0:0:0:ffff:a65a:154a
166.90.21.75 0:0:0:0:0:ffff:a65a:154b
166.90.21.76 0:0:0:0:0:ffff:a65a:154c
166.90.21.77 0:0:0:0:0:ffff:a65a:154d
166.90.21.78 0:0:0:0:0:ffff:a65a:154e
166.90.21.79 0:0:0:0:0:ffff:a65a:154f
166.90.21.80 0:0:0:0:0:ffff:a65a:1550
166.90.21.81 0:0:0:0:0:ffff:a65a:1551
166.90.21.82 0:0:0:0:0:ffff:a65a:1552
166.90.21.83 0:0:0:0:0:ffff:a65a:1553
166.90.21.84 0:0:0:0:0:ffff:a65a:1554
166.90.21.85 0:0:0:0:0:ffff:a65a:1555
166.90.21.86 0:0:0:0:0:ffff:a65a:1556
166.90.21.87 0:0:0:0:0:ffff:a65a:1557
166.90.21.88 0:0:0:0:0:ffff:a65a:1558
166.90.21.89 0:0:0:0:0:ffff:a65a:1559
166.90.21.90 0:0:0:0:0:ffff:a65a:155a
166.90.21.91 0:0:0:0:0:ffff:a65a:155b
166.90.21.92 0:0:0:0:0:ffff:a65a:155c
166.90.21.93 0:0:0:0:0:ffff:a65a:155d
166.90.21.94 0:0:0:0:0:ffff:a65a:155e
166.90.21.95 0:0:0:0:0:ffff:a65a:155f
166.90.21.96 0:0:0:0:0:ffff:a65a:1560
166.90.21.97 0:0:0:0:0:ffff:a65a:1561
166.90.21.98 0:0:0:0:0:ffff:a65a:1562
166.90.21.99 0:0:0:0:0:ffff:a65a:1563
166.90.21.100 0:0:0:0:0:ffff:a65a:1564
166.90.21.101 0:0:0:0:0:ffff:a65a:1565
166.90.21.102 0:0:0:0:0:ffff:a65a:1566
166.90.21.103 0:0:0:0:0:ffff:a65a:1567
166.90.21.104 0:0:0:0:0:ffff:a65a:1568
166.90.21.105 0:0:0:0:0:ffff:a65a:1569
166.90.21.106 0:0:0:0:0:ffff:a65a:156a
166.90.21.107 0:0:0:0:0:ffff:a65a:156b
166.90.21.108 0:0:0:0:0:ffff:a65a:156c
166.90.21.109 0:0:0:0:0:ffff:a65a:156d
166.90.21.110 0:0:0:0:0:ffff:a65a:156e
166.90.21.111 0:0:0:0:0:ffff:a65a:156f
166.90.21.112 0:0:0:0:0:ffff:a65a:1570
166.90.21.113 0:0:0:0:0:ffff:a65a:1571
166.90.21.114 0:0:0:0:0:ffff:a65a:1572
166.90.21.115 0:0:0:0:0:ffff:a65a:1573
166.90.21.116 0:0:0:0:0:ffff:a65a:1574
166.90.21.117 0:0:0:0:0:ffff:a65a:1575
166.90.21.118 0:0:0:0:0:ffff:a65a:1576
166.90.21.119 0:0:0:0:0:ffff:a65a:1577
166.90.21.120 0:0:0:0:0:ffff:a65a:1578


166.90.21.121 0:0:0:0:0:ffff:a65a:1579
166.90.21.122 0:0:0:0:0:ffff:a65a:157a
166.90.21.123 0:0:0:0:0:ffff:a65a:157b
166.90.21.124 0:0:0:0:0:ffff:a65a:157c
166.90.21.125 0:0:0:0:0:ffff:a65a:157d
166.90.21.126 0:0:0:0:0:ffff:a65a:157e
166.90.21.127 0:0:0:0:0:ffff:a65a:157f
166.90.21.128 0:0:0:0:0:ffff:a65a:1580
166.90.21.129 0:0:0:0:0:ffff:a65a:1581
166.90.21.130 0:0:0:0:0:ffff:a65a:1582
166.90.21.131 0:0:0:0:0:ffff:a65a:1583
166.90.21.132 0:0:0:0:0:ffff:a65a:1584
166.90.21.133 0:0:0:0:0:ffff:a65a:1585
166.90.21.134 0:0:0:0:0:ffff:a65a:1586
166.90.21.135 0:0:0:0:0:ffff:a65a:1587
166.90.21.136 0:0:0:0:0:ffff:a65a:1588
166.90.21.137 0:0:0:0:0:ffff:a65a:1589
166.90.21.138 0:0:0:0:0:ffff:a65a:158a
166.90.21.139 0:0:0:0:0:ffff:a65a:158b
166.90.21.140 0:0:0:0:0:ffff:a65a:158c
166.90.21.141 0:0:0:0:0:ffff:a65a:158d
166.90.21.142 0:0:0:0:0:ffff:a65a:158e
166.90.21.143 0:0:0:0:0:ffff:a65a:158f
166.90.21.144 0:0:0:0:0:ffff:a65a:1590
166.90.21.145 0:0:0:0:0:ffff:a65a:1591
166.90.21.146 0:0:0:0:0:ffff:a65a:1592
166.90.21.147 0:0:0:0:0:ffff:a65a:1593
166.90.21.148 0:0:0:0:0:ffff:a65a:1594
166.90.21.149 0:0:0:0:0:ffff:a65a:1595
166.90.21.150 0:0:0:0:0:ffff:a65a:1596
166.90.21.151 0:0:0:0:0:ffff:a65a:1597
166.90.21.152 0:0:0:0:0:ffff:a65a:1598
166.90.21.153 0:0:0:0:0:ffff:a65a:1599
166.90.21.154 0:0:0:0:0:ffff:a65a:159a
166.90.21.155 0:0:0:0:0:ffff:a65a:159b
166.90.21.156 0:0:0:0:0:ffff:a65a:159c
166.90.21.157 0:0:0:0:0:ffff:a65a:159d
166.90.21.158 0:0:0:0:0:ffff:a65a:159e
166.90.21.159 0:0:0:0:0:ffff:a65a:159f
166.90.21.160 0:0:0:0:0:ffff:a65a:15a0
166.90.21.161 0:0:0:0:0:ffff:a65a:15a1
166.90.21.162 0:0:0:0:0:ffff:a65a:15a2
166.90.21.163 0:0:0:0:0:ffff:a65a:15a3
166.90.21.164 0:0:0:0:0:ffff:a65a:15a4
166.90.21.165 0:0:0:0:0:ffff:a65a:15a5
166.90.21.166 0:0:0:0:0:ffff:a65a:15a6
166.90.21.167 0:0:0:0:0:ffff:a65a:15a7
166.90.21.168 0:0:0:0:0:ffff:a65a:15a8
166.90.21.169 0:0:0:0:0:ffff:a65a:15a9
166.90.21.170 0:0:0:0:0:ffff:a65a:15aa
166.90.21.171 0:0:0:0:0:ffff:a65a:15ab
166.90.21.172 0:0:0:0:0:ffff:a65a:15ac
166.90.21.173 0:0:0:0:0:ffff:a65a:15ad
166.90.21.174 0:0:0:0:0:ffff:a65a:15ae
166.90.21.175 0:0:0:0:0:ffff:a65a:15af
166.90.21.176 0:0:0:0:0:ffff:a65a:15b0
166.90.21.177 0:0:0:0:0:ffff:a65a:15b1
166.90.21.178 0:0:0:0:0:ffff:a65a:15b2
166.90.21.179 0:0:0:0:0:ffff:a65a:15b3
166.90.21.180 0:0:0:0:0:ffff:a65a:15b4


166.90.21.181 0:0:0:0:0:ffff:a65a:15b5
166.90.21.182 0:0:0:0:0:ffff:a65a:15b6
166.90.21.183 0:0:0:0:0:ffff:a65a:15b7
166.90.21.184 0:0:0:0:0:ffff:a65a:15b8
166.90.21.185 0:0:0:0:0:ffff:a65a:15b9
166.90.21.186 0:0:0:0:0:ffff:a65a:15ba
166.90.21.187 0:0:0:0:0:ffff:a65a:15bb
166.90.21.188 0:0:0:0:0:ffff:a65a:15bc
166.90.21.189 0:0:0:0:0:ffff:a65a:15bd
166.90.21.190 0:0:0:0:0:ffff:a65a:15be
166.90.21.191 0:0:0:0:0:ffff:a65a:15bf
166.90.21.192 0:0:0:0:0:ffff:a65a:15c0
166.90.21.193 0:0:0:0:0:ffff:a65a:15c1
166.90.21.194 0:0:0:0:0:ffff:a65a:15c2
166.90.21.195 0:0:0:0:0:ffff:a65a:15c3
166.90.21.196 0:0:0:0:0:ffff:a65a:15c4
166.90.21.197 0:0:0:0:0:ffff:a65a:15c5
166.90.21.198 0:0:0:0:0:ffff:a65a:15c6
166.90.21.199 0:0:0:0:0:ffff:a65a:15c7
166.90.21.200 0:0:0:0:0:ffff:a65a:15c8
166.90.21.201 0:0:0:0:0:ffff:a65a:15c9
166.90.21.202 0:0:0:0:0:ffff:a65a:15ca
166.90.21.203 0:0:0:0:0:ffff:a65a:15cb
166.90.21.204 0:0:0:0:0:ffff:a65a:15cc
166.90.21.205 0:0:0:0:0:ffff:a65a:15cd
166.90.21.206 0:0:0:0:0:ffff:a65a:15ce
166.90.21.207 0:0:0:0:0:ffff:a65a:15cf
166.90.21.208 0:0:0:0:0:ffff:a65a:15d0
166.90.21.209 0:0:0:0:0:ffff:a65a:15d1
166.90.21.210 0:0:0:0:0:ffff:a65a:15d2
166.90.21.211 0:0:0:0:0:ffff:a65a:15d3
166.90.21.212 0:0:0:0:0:ffff:a65a:15d4
166.90.21.213 0:0:0:0:0:ffff:a65a:15d5
166.90.21.214 0:0:0:0:0:ffff:a65a:15d6
166.90.21.215 0:0:0:0:0:ffff:a65a:15d7
166.90.21.216 0:0:0:0:0:ffff:a65a:15d8
166.90.21.217 0:0:0:0:0:ffff:a65a:15d9
166.90.21.218 0:0:0:0:0:ffff:a65a:15da
166.90.21.219 0:0:0:0:0:ffff:a65a:15db
166.90.21.220 0:0:0:0:0:ffff:a65a:15dc
166.90.21.221 0:0:0:0:0:ffff:a65a:15dd
166.90.21.222 0:0:0:0:0:ffff:a65a:15de
166.90.21.223 0:0:0:0:0:ffff:a65a:15df
166.90.21.224 0:0:0:0:0:ffff:a65a:15e0
166.90.21.225 0:0:0:0:0:ffff:a65a:15e1
166.90.21.226 0:0:0:0:0:ffff:a65a:15e2
166.90.21.227 0:0:0:0:0:ffff:a65a:15e3
166.90.21.228 0:0:0:0:0:ffff:a65a:15e4
166.90.21.229 0:0:0:0:0:ffff:a65a:15e5
166.90.21.230 0:0:0:0:0:ffff:a65a:15e6
166.90.21.231 0:0:0:0:0:ffff:a65a:15e7
166.90.21.232 0:0:0:0:0:ffff:a65a:15e8
166.90.21.233 0:0:0:0:0:ffff:a65a:15e9
166.90.21.234 0:0:0:0:0:ffff:a65a:15ea
166.90.21.235 0:0:0:0:0:ffff:a65a:15eb
166.90.21.236 0:0:0:0:0:ffff:a65a:15ec
166.90.21.237 0:0:0:0:0:ffff:a65a:15ed
166.90.21.238 0:0:0:0:0:ffff:a65a:15ee
166.90.21.239 0:0:0:0:0:ffff:a65a:15ef
166.90.21.240 0:0:0:0:0:ffff:a65a:15f0
166.90.21.241 0:0:0:0:0:ffff:a65a:15f1
166.90.21.242 0:0:0:0:0:ffff:a65a:15f2
166.90.21.243 0:0:0:0:0:ffff:a65a:15f3
166.90.21.244 0:0:0:0:0:ffff:a65a:15f4
166.90.21.245 0:0:0:0:0:ffff:a65a:15f5
166.90.21.246 0:0:0:0:0:ffff:a65a:15f6
166.90.21.247 0:0:0:0:0:ffff:a65a:15f7
166.90.21.248 0:0:0:0:0:ffff:a65a:15f8
166.90.21.249 0:0:0:0:0:ffff:a65a:15f9
166.90.21.250 0:0:0:0:0:ffff:a65a:15fa
166.90.21.251 0:0:0:0:0:ffff:a65a:15fb
166.90.21.252 0:0:0:0:0:ffff:a65a:15fc
166.90.21.253 0:0:0:0:0:ffff:a65a:15fd
166.90.21.254 0:0:0:0:0:ffff:a65a:15fe
166.90.21.255 0:0:0:0:0:ffff:a65a:15ff


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.