Networking & Web

IPv4 Range Expander

Enter a start and end address to expand the full list of IPs in between, with a total count for very large ranges.

Free & unlimitedRuns in your browserNo sign-up required

CIDR range (e.g. 10.0.0.0/16)

Total addresses256

192.168.1.0
192.168.1.1
192.168.1.2
192.168.1.3
192.168.1.4
192.168.1.5
192.168.1.6
192.168.1.7
192.168.1.8
192.168.1.9
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
192.168.1.14
192.168.1.15
192.168.1.16
192.168.1.17
192.168.1.18
192.168.1.19
192.168.1.20
192.168.1.21
192.168.1.22
192.168.1.23
192.168.1.24
192.168.1.25
192.168.1.26
192.168.1.27
192.168.1.28
192.168.1.29
192.168.1.30
192.168.1.31
192.168.1.32
192.168.1.33
192.168.1.34
192.168.1.35
192.168.1.36
192.168.1.37
192.168.1.38
192.168.1.39
192.168.1.40
192.168.1.41
192.168.1.42
192.168.1.43
192.168.1.44
192.168.1.45
192.168.1.46
192.168.1.47
192.168.1.48
192.168.1.49
192.168.1.50
192.168.1.51
192.168.1.52
192.168.1.53
192.168.1.54
192.168.1.55
192.168.1.56
192.168.1.57
192.168.1.58
192.168.1.59
192.168.1.60
192.168.1.61
192.168.1.62
192.168.1.63
192.168.1.64
192.168.1.65
192.168.1.66
192.168.1.67
192.168.1.68
192.168.1.69
192.168.1.70
192.168.1.71
192.168.1.72
192.168.1.73
192.168.1.74
192.168.1.75
192.168.1.76
192.168.1.77
192.168.1.78
192.168.1.79
192.168.1.80
192.168.1.81
192.168.1.82
192.168.1.83
192.168.1.84
192.168.1.85
192.168.1.86
192.168.1.87
192.168.1.88
192.168.1.89
192.168.1.90
192.168.1.91
192.168.1.92
192.168.1.93
192.168.1.94
192.168.1.95
192.168.1.96
192.168.1.97
192.168.1.98
192.168.1.99
192.168.1.100
192.168.1.101
192.168.1.102
192.168.1.103
192.168.1.104
192.168.1.105
192.168.1.106
192.168.1.107
192.168.1.108
192.168.1.109
192.168.1.110
192.168.1.111
192.168.1.112
192.168.1.113
192.168.1.114
192.168.1.115
192.168.1.116
192.168.1.117
192.168.1.118
192.168.1.119
192.168.1.120
192.168.1.121
192.168.1.122
192.168.1.123
192.168.1.124
192.168.1.125
192.168.1.126
192.168.1.127
192.168.1.128
192.168.1.129
192.168.1.130
192.168.1.131
192.168.1.132
192.168.1.133
192.168.1.134
192.168.1.135
192.168.1.136
192.168.1.137
192.168.1.138
192.168.1.139
192.168.1.140
192.168.1.141
192.168.1.142
192.168.1.143
192.168.1.144
192.168.1.145
192.168.1.146
192.168.1.147
192.168.1.148
192.168.1.149
192.168.1.150
192.168.1.151
192.168.1.152
192.168.1.153
192.168.1.154
192.168.1.155
192.168.1.156
192.168.1.157
192.168.1.158
192.168.1.159
192.168.1.160
192.168.1.161
192.168.1.162
192.168.1.163
192.168.1.164
192.168.1.165
192.168.1.166
192.168.1.167
192.168.1.168
192.168.1.169
192.168.1.170
192.168.1.171
192.168.1.172
192.168.1.173
192.168.1.174
192.168.1.175
192.168.1.176
192.168.1.177
192.168.1.178
192.168.1.179
192.168.1.180
192.168.1.181
192.168.1.182
192.168.1.183
192.168.1.184
192.168.1.185
192.168.1.186
192.168.1.187
192.168.1.188
192.168.1.189
192.168.1.190
192.168.1.191
192.168.1.192
192.168.1.193
192.168.1.194
192.168.1.195
192.168.1.196
192.168.1.197
192.168.1.198
192.168.1.199
192.168.1.200
192.168.1.201
192.168.1.202
192.168.1.203
192.168.1.204
192.168.1.205
192.168.1.206
192.168.1.207
192.168.1.208
192.168.1.209
192.168.1.210
192.168.1.211
192.168.1.212
192.168.1.213
192.168.1.214
192.168.1.215
192.168.1.216
192.168.1.217
192.168.1.218
192.168.1.219
192.168.1.220
192.168.1.221
192.168.1.222
192.168.1.223
192.168.1.224
192.168.1.225
192.168.1.226
192.168.1.227
192.168.1.228
192.168.1.229
192.168.1.230
192.168.1.231
192.168.1.232
192.168.1.233
192.168.1.234
192.168.1.235
192.168.1.236
192.168.1.237
192.168.1.238
192.168.1.239
192.168.1.240
192.168.1.241
192.168.1.242
192.168.1.243
192.168.1.244
192.168.1.245
192.168.1.246
192.168.1.247
192.168.1.248
192.168.1.249
192.168.1.250
192.168.1.251
192.168.1.252
192.168.1.253
192.168.1.254
192.168.1.255

CIDR Range Expansion Explained

CIDR (Classless Inter-Domain Routing) range expansion converts a network block in prefix notation into the complete list of individual IP addresses it contains.

Reading CIDR notation

In 10.0.0.0/8, the /8 means the first 8 bits are the network identifier, and the remaining 24 bits are for host addresses. This gives 2²⁴ = 16,777,216 addresses. The prefix /16 gives 65,536 addresses, /24 gives 256, and /32 is a single host.

Use cases for IP range expansion

Security teams expand IP ranges to build allowlists and blocklists for firewalls. DevOps engineers expand ranges to verify cloud security group rules. Network auditors expand ranges to cross-reference DHCP lease assignments against expected allocations.

Supernetting vs. subnetting

Subnetting splits a large block into smaller ones (/24 from /16). Supernetting (aggregation) merges multiple small blocks into a larger one — reducing the number of routes in a routing table. Both operations rely on CIDR prefix arithmetic.

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How it works

Three steps, no setup

Enter a start and end IP

The range is validated to make sure start comes before end.

Get the expanded list

Up to 256 addresses are listed individually.

See the total count

Larger ranges show a total instead of listing every address.

Common questions

Frequently asked questions

Why is there a 256 address display limit?

It keeps the output readable — for very large ranges, the total count is far more useful than scrolling through thousands of lines.

Can start and end be in different subnets?

Yes, as long as the start address numerically precedes the end address.

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192.168.1.0 192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4 192.168.1.5 192.168.1.6 192.168.1.7 192.168.1.8 192.168.1.9 192.168.1.10 192.168.1.11 192.168.1.12 192.168.1.13 192.168.1.14 192.168.1.15 192.168.1.16 192.168.1.17 192.168.1.18 192.168.1.19 192.168.1.20 192.168.1.21 192.168.1.22 192.168.1.23 192.168.1.24 192.168.1.25 192.168.1.26 192.168.1.27 192.168.1.28 192.168.1.29 192.168.1.30 192.168.1.31 192.168.1.32 192.168.1.33 192.168.1.34 192.168.1.35 192.168.1.36 192.168.1.37 192.168.1.38 192.168.1.39 192.168.1.40 192.168.1.41 192.168.1.42 192.168.1.43 192.168.1.44 192.168.1.45 192.168.1.46 192.168.1.47 192.168.1.48 192.168.1.49 192.168.1.50 192.168.1.51 192.168.1.52 192.168.1.53 192.168.1.54 192.168.1.55 192.168.1.56 192.168.1.57 192.168.1.58 192.168.1.59 192.168.1.60 192.168.1.61 192.168.1.62 192.168.1.63 192.168.1.64 192.168.1.65 192.168.1.66 192.168.1.67 192.168.1.68 192.168.1.69 192.168.1.70 192.168.1.71 192.168.1.72 192.168.1.73 192.168.1.74 192.168.1.75 192.168.1.76 192.168.1.77 192.168.1.78 192.168.1.79 192.168.1.80 192.168.1.81 192.168.1.82 192.168.1.83 192.168.1.84 192.168.1.85 192.168.1.86 192.168.1.87 192.168.1.88 192.168.1.89 192.168.1.90 192.168.1.91 192.168.1.92 192.168.1.93 192.168.1.94 192.168.1.95 192.168.1.96 192.168.1.97 192.168.1.98 192.168.1.99 192.168.1.100 192.168.1.101 192.168.1.102 192.168.1.103 192.168.1.104 192.168.1.105 192.168.1.106 192.168.1.107 192.168.1.108 192.168.1.109 192.168.1.110 192.168.1.111 192.168.1.112 192.168.1.113 192.168.1.114 192.168.1.115 192.168.1.116 192.168.1.117 192.168.1.118 192.168.1.119 192.168.1.120 192.168.1.121 192.168.1.122 192.168.1.123 192.168.1.124 192.168.1.125 192.168.1.126 192.168.1.127 192.168.1.128 192.168.1.129 192.168.1.130 192.168.1.131 192.168.1.132 192.168.1.133 192.168.1.134 192.168.1.135 192.168.1.136 192.168.1.137 192.168.1.138 192.168.1.139 192.168.1.140 192.168.1.141 192.168.1.142 192.168.1.143 192.168.1.144 192.168.1.145 192.168.1.146 192.168.1.147 192.168.1.148 192.168.1.149 192.168.1.150 192.168.1.151 192.168.1.152 192.168.1.153 192.168.1.154 192.168.1.155 192.168.1.156 192.168.1.157 192.168.1.158 192.168.1.159 192.168.1.160 192.168.1.161 192.168.1.162 192.168.1.163 192.168.1.164 192.168.1.165 192.168.1.166 192.168.1.167 192.168.1.168 192.168.1.169 192.168.1.170 192.168.1.171 192.168.1.172 192.168.1.173 192.168.1.174 192.168.1.175 192.168.1.176 192.168.1.177 192.168.1.178 192.168.1.179 192.168.1.180 192.168.1.181 192.168.1.182 192.168.1.183 192.168.1.184 192.168.1.185 192.168.1.186 192.168.1.187 192.168.1.188 192.168.1.189 192.168.1.190 192.168.1.191 192.168.1.192 192.168.1.193 192.168.1.194 192.168.1.195 192.168.1.196 192.168.1.197 192.168.1.198 192.168.1.199 192.168.1.200 192.168.1.201 192.168.1.202 192.168.1.203 192.168.1.204 192.168.1.205 192.168.1.206 192.168.1.207 192.168.1.208 192.168.1.209 192.168.1.210 192.168.1.211 192.168.1.212 192.168.1.213 192.168.1.214 192.168.1.215 192.168.1.216 192.168.1.217 192.168.1.218 192.168.1.219 192.168.1.220 192.168.1.221 192.168.1.222 192.168.1.223 192.168.1.224 192.168.1.225 192.168.1.226 192.168.1.227 192.168.1.228 192.168.1.229 192.168.1.230 192.168.1.231 192.168.1.232 192.168.1.233 192.168.1.234 192.168.1.235 192.168.1.236 192.168.1.237 192.168.1.238 192.168.1.239 192.168.1.240 192.168.1.241 192.168.1.242 192.168.1.243 192.168.1.244 192.168.1.245 192.168.1.246 192.168.1.247 192.168.1.248 192.168.1.249 192.168.1.250 192.168.1.251 192.168.1.252 192.168.1.253 192.168.1.254 192.168.1.255

CIDR Range Expansion Explained

CIDR (Classless Inter-Domain Routing) range expansion converts a network block in prefix notation into the complete list of individual IP addresses it contains.

IPv4 Range Expander

CIDR Range Expansion Explained

Reading CIDR notation

Use cases for IP range expansion

Supernetting vs. subnetting

Three steps, no setup

Enter a start and end IP

Get the expanded list

See the total count

Frequently asked questions

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twoworks

CIDR Range Expansion Explained

Reading CIDR notation

Use cases for IP range expansion

Supernetting vs. subnetting