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
157.127.21.1 0:0:0:0:0:ffff:9d7f:1501
157.127.21.2 0:0:0:0:0:ffff:9d7f:1502
157.127.21.3 0:0:0:0:0:ffff:9d7f:1503
157.127.21.4 0:0:0:0:0:ffff:9d7f:1504
157.127.21.5 0:0:0:0:0:ffff:9d7f:1505
157.127.21.6 0:0:0:0:0:ffff:9d7f:1506
157.127.21.7 0:0:0:0:0:ffff:9d7f:1507
157.127.21.8 0:0:0:0:0:ffff:9d7f:1508
157.127.21.9 0:0:0:0:0:ffff:9d7f:1509
157.127.21.10 0:0:0:0:0:ffff:9d7f:150a
157.127.21.11 0:0:0:0:0:ffff:9d7f:150b
157.127.21.12 0:0:0:0:0:ffff:9d7f:150c
157.127.21.13 0:0:0:0:0:ffff:9d7f:150d
157.127.21.14 0:0:0:0:0:ffff:9d7f:150e
157.127.21.15 0:0:0:0:0:ffff:9d7f:150f
157.127.21.16 0:0:0:0:0:ffff:9d7f:1510
157.127.21.17 0:0:0:0:0:ffff:9d7f:1511
157.127.21.18 0:0:0:0:0:ffff:9d7f:1512
157.127.21.19 0:0:0:0:0:ffff:9d7f:1513
157.127.21.20 0:0:0:0:0:ffff:9d7f:1514
157.127.21.21 0:0:0:0:0:ffff:9d7f:1515
157.127.21.22 0:0:0:0:0:ffff:9d7f:1516
157.127.21.23 0:0:0:0:0:ffff:9d7f:1517
157.127.21.24 0:0:0:0:0:ffff:9d7f:1518
157.127.21.25 0:0:0:0:0:ffff:9d7f:1519
157.127.21.26 0:0:0:0:0:ffff:9d7f:151a
157.127.21.27 0:0:0:0:0:ffff:9d7f:151b
157.127.21.28 0:0:0:0:0:ffff:9d7f:151c
157.127.21.29 0:0:0:0:0:ffff:9d7f:151d
157.127.21.30 0:0:0:0:0:ffff:9d7f:151e
157.127.21.31 0:0:0:0:0:ffff:9d7f:151f
157.127.21.32 0:0:0:0:0:ffff:9d7f:1520
157.127.21.33 0:0:0:0:0:ffff:9d7f:1521
157.127.21.34 0:0:0:0:0:ffff:9d7f:1522
157.127.21.35 0:0:0:0:0:ffff:9d7f:1523
157.127.21.36 0:0:0:0:0:ffff:9d7f:1524
157.127.21.37 0:0:0:0:0:ffff:9d7f:1525
157.127.21.38 0:0:0:0:0:ffff:9d7f:1526
157.127.21.39 0:0:0:0:0:ffff:9d7f:1527
157.127.21.40 0:0:0:0:0:ffff:9d7f:1528
157.127.21.41 0:0:0:0:0:ffff:9d7f:1529
157.127.21.42 0:0:0:0:0:ffff:9d7f:152a
157.127.21.43 0:0:0:0:0:ffff:9d7f:152b
157.127.21.44 0:0:0:0:0:ffff:9d7f:152c
157.127.21.45 0:0:0:0:0:ffff:9d7f:152d
157.127.21.46 0:0:0:0:0:ffff:9d7f:152e
157.127.21.47 0:0:0:0:0:ffff:9d7f:152f
157.127.21.48 0:0:0:0:0:ffff:9d7f:1530
157.127.21.49 0:0:0:0:0:ffff:9d7f:1531
157.127.21.50 0:0:0:0:0:ffff:9d7f:1532
157.127.21.51 0:0:0:0:0:ffff:9d7f:1533
157.127.21.52 0:0:0:0:0:ffff:9d7f:1534
157.127.21.53 0:0:0:0:0:ffff:9d7f:1535
157.127.21.54 0:0:0:0:0:ffff:9d7f:1536
157.127.21.55 0:0:0:0:0:ffff:9d7f:1537
157.127.21.56 0:0:0:0:0:ffff:9d7f:1538
157.127.21.57 0:0:0:0:0:ffff:9d7f:1539
157.127.21.58 0:0:0:0:0:ffff:9d7f:153a
157.127.21.59 0:0:0:0:0:ffff:9d7f:153b
157.127.21.60 0:0:0:0:0:ffff:9d7f:153c


157.127.21.61 0:0:0:0:0:ffff:9d7f:153d
157.127.21.62 0:0:0:0:0:ffff:9d7f:153e
157.127.21.63 0:0:0:0:0:ffff:9d7f:153f
157.127.21.64 0:0:0:0:0:ffff:9d7f:1540
157.127.21.65 0:0:0:0:0:ffff:9d7f:1541
157.127.21.66 0:0:0:0:0:ffff:9d7f:1542
157.127.21.67 0:0:0:0:0:ffff:9d7f:1543
157.127.21.68 0:0:0:0:0:ffff:9d7f:1544
157.127.21.69 0:0:0:0:0:ffff:9d7f:1545
157.127.21.70 0:0:0:0:0:ffff:9d7f:1546
157.127.21.71 0:0:0:0:0:ffff:9d7f:1547
157.127.21.72 0:0:0:0:0:ffff:9d7f:1548
157.127.21.73 0:0:0:0:0:ffff:9d7f:1549
157.127.21.74 0:0:0:0:0:ffff:9d7f:154a
157.127.21.75 0:0:0:0:0:ffff:9d7f:154b
157.127.21.76 0:0:0:0:0:ffff:9d7f:154c
157.127.21.77 0:0:0:0:0:ffff:9d7f:154d
157.127.21.78 0:0:0:0:0:ffff:9d7f:154e
157.127.21.79 0:0:0:0:0:ffff:9d7f:154f
157.127.21.80 0:0:0:0:0:ffff:9d7f:1550
157.127.21.81 0:0:0:0:0:ffff:9d7f:1551
157.127.21.82 0:0:0:0:0:ffff:9d7f:1552
157.127.21.83 0:0:0:0:0:ffff:9d7f:1553
157.127.21.84 0:0:0:0:0:ffff:9d7f:1554
157.127.21.85 0:0:0:0:0:ffff:9d7f:1555
157.127.21.86 0:0:0:0:0:ffff:9d7f:1556
157.127.21.87 0:0:0:0:0:ffff:9d7f:1557
157.127.21.88 0:0:0:0:0:ffff:9d7f:1558
157.127.21.89 0:0:0:0:0:ffff:9d7f:1559
157.127.21.90 0:0:0:0:0:ffff:9d7f:155a
157.127.21.91 0:0:0:0:0:ffff:9d7f:155b
157.127.21.92 0:0:0:0:0:ffff:9d7f:155c
157.127.21.93 0:0:0:0:0:ffff:9d7f:155d
157.127.21.94 0:0:0:0:0:ffff:9d7f:155e
157.127.21.95 0:0:0:0:0:ffff:9d7f:155f
157.127.21.96 0:0:0:0:0:ffff:9d7f:1560
157.127.21.97 0:0:0:0:0:ffff:9d7f:1561
157.127.21.98 0:0:0:0:0:ffff:9d7f:1562
157.127.21.99 0:0:0:0:0:ffff:9d7f:1563
157.127.21.100 0:0:0:0:0:ffff:9d7f:1564
157.127.21.101 0:0:0:0:0:ffff:9d7f:1565
157.127.21.102 0:0:0:0:0:ffff:9d7f:1566
157.127.21.103 0:0:0:0:0:ffff:9d7f:1567
157.127.21.104 0:0:0:0:0:ffff:9d7f:1568
157.127.21.105 0:0:0:0:0:ffff:9d7f:1569
157.127.21.106 0:0:0:0:0:ffff:9d7f:156a
157.127.21.107 0:0:0:0:0:ffff:9d7f:156b
157.127.21.108 0:0:0:0:0:ffff:9d7f:156c
157.127.21.109 0:0:0:0:0:ffff:9d7f:156d
157.127.21.110 0:0:0:0:0:ffff:9d7f:156e
157.127.21.111 0:0:0:0:0:ffff:9d7f:156f
157.127.21.112 0:0:0:0:0:ffff:9d7f:1570
157.127.21.113 0:0:0:0:0:ffff:9d7f:1571
157.127.21.114 0:0:0:0:0:ffff:9d7f:1572
157.127.21.115 0:0:0:0:0:ffff:9d7f:1573
157.127.21.116 0:0:0:0:0:ffff:9d7f:1574
157.127.21.117 0:0:0:0:0:ffff:9d7f:1575
157.127.21.118 0:0:0:0:0:ffff:9d7f:1576
157.127.21.119 0:0:0:0:0:ffff:9d7f:1577
157.127.21.120 0:0:0:0:0:ffff:9d7f:1578


157.127.21.121 0:0:0:0:0:ffff:9d7f:1579
157.127.21.122 0:0:0:0:0:ffff:9d7f:157a
157.127.21.123 0:0:0:0:0:ffff:9d7f:157b
157.127.21.124 0:0:0:0:0:ffff:9d7f:157c
157.127.21.125 0:0:0:0:0:ffff:9d7f:157d
157.127.21.126 0:0:0:0:0:ffff:9d7f:157e
157.127.21.127 0:0:0:0:0:ffff:9d7f:157f
157.127.21.128 0:0:0:0:0:ffff:9d7f:1580
157.127.21.129 0:0:0:0:0:ffff:9d7f:1581
157.127.21.130 0:0:0:0:0:ffff:9d7f:1582
157.127.21.131 0:0:0:0:0:ffff:9d7f:1583
157.127.21.132 0:0:0:0:0:ffff:9d7f:1584
157.127.21.133 0:0:0:0:0:ffff:9d7f:1585
157.127.21.134 0:0:0:0:0:ffff:9d7f:1586
157.127.21.135 0:0:0:0:0:ffff:9d7f:1587
157.127.21.136 0:0:0:0:0:ffff:9d7f:1588
157.127.21.137 0:0:0:0:0:ffff:9d7f:1589
157.127.21.138 0:0:0:0:0:ffff:9d7f:158a
157.127.21.139 0:0:0:0:0:ffff:9d7f:158b
157.127.21.140 0:0:0:0:0:ffff:9d7f:158c
157.127.21.141 0:0:0:0:0:ffff:9d7f:158d
157.127.21.142 0:0:0:0:0:ffff:9d7f:158e
157.127.21.143 0:0:0:0:0:ffff:9d7f:158f
157.127.21.144 0:0:0:0:0:ffff:9d7f:1590
157.127.21.145 0:0:0:0:0:ffff:9d7f:1591
157.127.21.146 0:0:0:0:0:ffff:9d7f:1592
157.127.21.147 0:0:0:0:0:ffff:9d7f:1593
157.127.21.148 0:0:0:0:0:ffff:9d7f:1594
157.127.21.149 0:0:0:0:0:ffff:9d7f:1595
157.127.21.150 0:0:0:0:0:ffff:9d7f:1596
157.127.21.151 0:0:0:0:0:ffff:9d7f:1597
157.127.21.152 0:0:0:0:0:ffff:9d7f:1598
157.127.21.153 0:0:0:0:0:ffff:9d7f:1599
157.127.21.154 0:0:0:0:0:ffff:9d7f:159a
157.127.21.155 0:0:0:0:0:ffff:9d7f:159b
157.127.21.156 0:0:0:0:0:ffff:9d7f:159c
157.127.21.157 0:0:0:0:0:ffff:9d7f:159d
157.127.21.158 0:0:0:0:0:ffff:9d7f:159e
157.127.21.159 0:0:0:0:0:ffff:9d7f:159f
157.127.21.160 0:0:0:0:0:ffff:9d7f:15a0
157.127.21.161 0:0:0:0:0:ffff:9d7f:15a1
157.127.21.162 0:0:0:0:0:ffff:9d7f:15a2
157.127.21.163 0:0:0:0:0:ffff:9d7f:15a3
157.127.21.164 0:0:0:0:0:ffff:9d7f:15a4
157.127.21.165 0:0:0:0:0:ffff:9d7f:15a5
157.127.21.166 0:0:0:0:0:ffff:9d7f:15a6
157.127.21.167 0:0:0:0:0:ffff:9d7f:15a7
157.127.21.168 0:0:0:0:0:ffff:9d7f:15a8
157.127.21.169 0:0:0:0:0:ffff:9d7f:15a9
157.127.21.170 0:0:0:0:0:ffff:9d7f:15aa
157.127.21.171 0:0:0:0:0:ffff:9d7f:15ab
157.127.21.172 0:0:0:0:0:ffff:9d7f:15ac
157.127.21.173 0:0:0:0:0:ffff:9d7f:15ad
157.127.21.174 0:0:0:0:0:ffff:9d7f:15ae
157.127.21.175 0:0:0:0:0:ffff:9d7f:15af
157.127.21.176 0:0:0:0:0:ffff:9d7f:15b0
157.127.21.177 0:0:0:0:0:ffff:9d7f:15b1
157.127.21.178 0:0:0:0:0:ffff:9d7f:15b2
157.127.21.179 0:0:0:0:0:ffff:9d7f:15b3
157.127.21.180 0:0:0:0:0:ffff:9d7f:15b4


157.127.21.181 0:0:0:0:0:ffff:9d7f:15b5
157.127.21.182 0:0:0:0:0:ffff:9d7f:15b6
157.127.21.183 0:0:0:0:0:ffff:9d7f:15b7
157.127.21.184 0:0:0:0:0:ffff:9d7f:15b8
157.127.21.185 0:0:0:0:0:ffff:9d7f:15b9
157.127.21.186 0:0:0:0:0:ffff:9d7f:15ba
157.127.21.187 0:0:0:0:0:ffff:9d7f:15bb
157.127.21.188 0:0:0:0:0:ffff:9d7f:15bc
157.127.21.189 0:0:0:0:0:ffff:9d7f:15bd
157.127.21.190 0:0:0:0:0:ffff:9d7f:15be
157.127.21.191 0:0:0:0:0:ffff:9d7f:15bf
157.127.21.192 0:0:0:0:0:ffff:9d7f:15c0
157.127.21.193 0:0:0:0:0:ffff:9d7f:15c1
157.127.21.194 0:0:0:0:0:ffff:9d7f:15c2
157.127.21.195 0:0:0:0:0:ffff:9d7f:15c3
157.127.21.196 0:0:0:0:0:ffff:9d7f:15c4
157.127.21.197 0:0:0:0:0:ffff:9d7f:15c5
157.127.21.198 0:0:0:0:0:ffff:9d7f:15c6
157.127.21.199 0:0:0:0:0:ffff:9d7f:15c7
157.127.21.200 0:0:0:0:0:ffff:9d7f:15c8
157.127.21.201 0:0:0:0:0:ffff:9d7f:15c9
157.127.21.202 0:0:0:0:0:ffff:9d7f:15ca
157.127.21.203 0:0:0:0:0:ffff:9d7f:15cb
157.127.21.204 0:0:0:0:0:ffff:9d7f:15cc
157.127.21.205 0:0:0:0:0:ffff:9d7f:15cd
157.127.21.206 0:0:0:0:0:ffff:9d7f:15ce
157.127.21.207 0:0:0:0:0:ffff:9d7f:15cf
157.127.21.208 0:0:0:0:0:ffff:9d7f:15d0
157.127.21.209 0:0:0:0:0:ffff:9d7f:15d1
157.127.21.210 0:0:0:0:0:ffff:9d7f:15d2
157.127.21.211 0:0:0:0:0:ffff:9d7f:15d3
157.127.21.212 0:0:0:0:0:ffff:9d7f:15d4
157.127.21.213 0:0:0:0:0:ffff:9d7f:15d5
157.127.21.214 0:0:0:0:0:ffff:9d7f:15d6
157.127.21.215 0:0:0:0:0:ffff:9d7f:15d7
157.127.21.216 0:0:0:0:0:ffff:9d7f:15d8
157.127.21.217 0:0:0:0:0:ffff:9d7f:15d9
157.127.21.218 0:0:0:0:0:ffff:9d7f:15da
157.127.21.219 0:0:0:0:0:ffff:9d7f:15db
157.127.21.220 0:0:0:0:0:ffff:9d7f:15dc
157.127.21.221 0:0:0:0:0:ffff:9d7f:15dd
157.127.21.222 0:0:0:0:0:ffff:9d7f:15de
157.127.21.223 0:0:0:0:0:ffff:9d7f:15df
157.127.21.224 0:0:0:0:0:ffff:9d7f:15e0
157.127.21.225 0:0:0:0:0:ffff:9d7f:15e1
157.127.21.226 0:0:0:0:0:ffff:9d7f:15e2
157.127.21.227 0:0:0:0:0:ffff:9d7f:15e3
157.127.21.228 0:0:0:0:0:ffff:9d7f:15e4
157.127.21.229 0:0:0:0:0:ffff:9d7f:15e5
157.127.21.230 0:0:0:0:0:ffff:9d7f:15e6
157.127.21.231 0:0:0:0:0:ffff:9d7f:15e7
157.127.21.232 0:0:0:0:0:ffff:9d7f:15e8
157.127.21.233 0:0:0:0:0:ffff:9d7f:15e9
157.127.21.234 0:0:0:0:0:ffff:9d7f:15ea
157.127.21.235 0:0:0:0:0:ffff:9d7f:15eb
157.127.21.236 0:0:0:0:0:ffff:9d7f:15ec
157.127.21.237 0:0:0:0:0:ffff:9d7f:15ed
157.127.21.238 0:0:0:0:0:ffff:9d7f:15ee
157.127.21.239 0:0:0:0:0:ffff:9d7f:15ef
157.127.21.240 0:0:0:0:0:ffff:9d7f:15f0
157.127.21.241 0:0:0:0:0:ffff:9d7f:15f1
157.127.21.242 0:0:0:0:0:ffff:9d7f:15f2
157.127.21.243 0:0:0:0:0:ffff:9d7f:15f3
157.127.21.244 0:0:0:0:0:ffff:9d7f:15f4
157.127.21.245 0:0:0:0:0:ffff:9d7f:15f5
157.127.21.246 0:0:0:0:0:ffff:9d7f:15f6
157.127.21.247 0:0:0:0:0:ffff:9d7f:15f7
157.127.21.248 0:0:0:0:0:ffff:9d7f:15f8
157.127.21.249 0:0:0:0:0:ffff:9d7f:15f9
157.127.21.250 0:0:0:0:0:ffff:9d7f:15fa
157.127.21.251 0:0:0:0:0:ffff:9d7f:15fb
157.127.21.252 0:0:0:0:0:ffff:9d7f:15fc
157.127.21.253 0:0:0:0:0:ffff:9d7f:15fd
157.127.21.254 0:0:0:0:0:ffff:9d7f:15fe
157.127.21.255 0:0:0:0:0:ffff:9d7f: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.