IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.0.2.0/24

network10.0.2.0/24

broadcast10.0.2.255

first host10.0.2.1

last host10.0.2.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.2.0/24

address00001010.00000000.00000010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.00000010.00000000

broadcast00001010.00000000.00000010.11111111

green = network part, grey = host part

hex0x0a000200

decimal167772672

reverse dns0.2.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:200

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.2.0/32	10.0.2.0 – 10.0.2.0	10.0.2.0
2	10.0.2.1/32	10.0.2.1 – 10.0.2.1	10.0.2.1
3	10.0.2.2/32	10.0.2.2 – 10.0.2.2	10.0.2.2
4	10.0.2.3/32	10.0.2.3 – 10.0.2.3	10.0.2.3
5	10.0.2.4/32	10.0.2.4 – 10.0.2.4	10.0.2.4
6	10.0.2.5/32	10.0.2.5 – 10.0.2.5	10.0.2.5
7	10.0.2.6/32	10.0.2.6 – 10.0.2.6	10.0.2.6
8	10.0.2.7/32	10.0.2.7 – 10.0.2.7	10.0.2.7
9	10.0.2.8/32	10.0.2.8 – 10.0.2.8	10.0.2.8
10	10.0.2.9/32	10.0.2.9 – 10.0.2.9	10.0.2.9
11	10.0.2.10/32	10.0.2.10 – 10.0.2.10	10.0.2.10
12	10.0.2.11/32	10.0.2.11 – 10.0.2.11	10.0.2.11
13	10.0.2.12/32	10.0.2.12 – 10.0.2.12	10.0.2.12
14	10.0.2.13/32	10.0.2.13 – 10.0.2.13	10.0.2.13
15	10.0.2.14/32	10.0.2.14 – 10.0.2.14	10.0.2.14
16	10.0.2.15/32	10.0.2.15 – 10.0.2.15	10.0.2.15
17	10.0.2.16/32	10.0.2.16 – 10.0.2.16	10.0.2.16
18	10.0.2.17/32	10.0.2.17 – 10.0.2.17	10.0.2.17
19	10.0.2.18/32	10.0.2.18 – 10.0.2.18	10.0.2.18
20	10.0.2.19/32	10.0.2.19 – 10.0.2.19	10.0.2.19
21	10.0.2.20/32	10.0.2.20 – 10.0.2.20	10.0.2.20
22	10.0.2.21/32	10.0.2.21 – 10.0.2.21	10.0.2.21
23	10.0.2.22/32	10.0.2.22 – 10.0.2.22	10.0.2.22
24	10.0.2.23/32	10.0.2.23 – 10.0.2.23	10.0.2.23
25	10.0.2.24/32	10.0.2.24 – 10.0.2.24	10.0.2.24
26	10.0.2.25/32	10.0.2.25 – 10.0.2.25	10.0.2.25
27	10.0.2.26/32	10.0.2.26 – 10.0.2.26	10.0.2.26
28	10.0.2.27/32	10.0.2.27 – 10.0.2.27	10.0.2.27
29	10.0.2.28/32	10.0.2.28 – 10.0.2.28	10.0.2.28
30	10.0.2.29/32	10.0.2.29 – 10.0.2.29	10.0.2.29
31	10.0.2.30/32	10.0.2.30 – 10.0.2.30	10.0.2.30
32	10.0.2.31/32	10.0.2.31 – 10.0.2.31	10.0.2.31
33	10.0.2.32/32	10.0.2.32 – 10.0.2.32	10.0.2.32
34	10.0.2.33/32	10.0.2.33 – 10.0.2.33	10.0.2.33
35	10.0.2.34/32	10.0.2.34 – 10.0.2.34	10.0.2.34
36	10.0.2.35/32	10.0.2.35 – 10.0.2.35	10.0.2.35
37	10.0.2.36/32	10.0.2.36 – 10.0.2.36	10.0.2.36
38	10.0.2.37/32	10.0.2.37 – 10.0.2.37	10.0.2.37
39	10.0.2.38/32	10.0.2.38 – 10.0.2.38	10.0.2.38
40	10.0.2.39/32	10.0.2.39 – 10.0.2.39	10.0.2.39
41	10.0.2.40/32	10.0.2.40 – 10.0.2.40	10.0.2.40
42	10.0.2.41/32	10.0.2.41 – 10.0.2.41	10.0.2.41
43	10.0.2.42/32	10.0.2.42 – 10.0.2.42	10.0.2.42
44	10.0.2.43/32	10.0.2.43 – 10.0.2.43	10.0.2.43
45	10.0.2.44/32	10.0.2.44 – 10.0.2.44	10.0.2.44
46	10.0.2.45/32	10.0.2.45 – 10.0.2.45	10.0.2.45
47	10.0.2.46/32	10.0.2.46 – 10.0.2.46	10.0.2.46
48	10.0.2.47/32	10.0.2.47 – 10.0.2.47	10.0.2.47
49	10.0.2.48/32	10.0.2.48 – 10.0.2.48	10.0.2.48
50	10.0.2.49/32	10.0.2.49 – 10.0.2.49	10.0.2.49
51	10.0.2.50/32	10.0.2.50 – 10.0.2.50	10.0.2.50
52	10.0.2.51/32	10.0.2.51 – 10.0.2.51	10.0.2.51
53	10.0.2.52/32	10.0.2.52 – 10.0.2.52	10.0.2.52
54	10.0.2.53/32	10.0.2.53 – 10.0.2.53	10.0.2.53
55	10.0.2.54/32	10.0.2.54 – 10.0.2.54	10.0.2.54
56	10.0.2.55/32	10.0.2.55 – 10.0.2.55	10.0.2.55
57	10.0.2.56/32	10.0.2.56 – 10.0.2.56	10.0.2.56
58	10.0.2.57/32	10.0.2.57 – 10.0.2.57	10.0.2.57
59	10.0.2.58/32	10.0.2.58 – 10.0.2.58	10.0.2.58
60	10.0.2.59/32	10.0.2.59 – 10.0.2.59	10.0.2.59
61	10.0.2.60/32	10.0.2.60 – 10.0.2.60	10.0.2.60
62	10.0.2.61/32	10.0.2.61 – 10.0.2.61	10.0.2.61
63	10.0.2.62/32	10.0.2.62 – 10.0.2.62	10.0.2.62
64	10.0.2.63/32	10.0.2.63 – 10.0.2.63	10.0.2.63
65	10.0.2.64/32	10.0.2.64 – 10.0.2.64	10.0.2.64
66	10.0.2.65/32	10.0.2.65 – 10.0.2.65	10.0.2.65
67	10.0.2.66/32	10.0.2.66 – 10.0.2.66	10.0.2.66
68	10.0.2.67/32	10.0.2.67 – 10.0.2.67	10.0.2.67
69	10.0.2.68/32	10.0.2.68 – 10.0.2.68	10.0.2.68
70	10.0.2.69/32	10.0.2.69 – 10.0.2.69	10.0.2.69
71	10.0.2.70/32	10.0.2.70 – 10.0.2.70	10.0.2.70
72	10.0.2.71/32	10.0.2.71 – 10.0.2.71	10.0.2.71
73	10.0.2.72/32	10.0.2.72 – 10.0.2.72	10.0.2.72
74	10.0.2.73/32	10.0.2.73 – 10.0.2.73	10.0.2.73
75	10.0.2.74/32	10.0.2.74 – 10.0.2.74	10.0.2.74
76	10.0.2.75/32	10.0.2.75 – 10.0.2.75	10.0.2.75
77	10.0.2.76/32	10.0.2.76 – 10.0.2.76	10.0.2.76
78	10.0.2.77/32	10.0.2.77 – 10.0.2.77	10.0.2.77
79	10.0.2.78/32	10.0.2.78 – 10.0.2.78	10.0.2.78
80	10.0.2.79/32	10.0.2.79 – 10.0.2.79	10.0.2.79
81	10.0.2.80/32	10.0.2.80 – 10.0.2.80	10.0.2.80
82	10.0.2.81/32	10.0.2.81 – 10.0.2.81	10.0.2.81
83	10.0.2.82/32	10.0.2.82 – 10.0.2.82	10.0.2.82
84	10.0.2.83/32	10.0.2.83 – 10.0.2.83	10.0.2.83
85	10.0.2.84/32	10.0.2.84 – 10.0.2.84	10.0.2.84
86	10.0.2.85/32	10.0.2.85 – 10.0.2.85	10.0.2.85
87	10.0.2.86/32	10.0.2.86 – 10.0.2.86	10.0.2.86
88	10.0.2.87/32	10.0.2.87 – 10.0.2.87	10.0.2.87
89	10.0.2.88/32	10.0.2.88 – 10.0.2.88	10.0.2.88
90	10.0.2.89/32	10.0.2.89 – 10.0.2.89	10.0.2.89
91	10.0.2.90/32	10.0.2.90 – 10.0.2.90	10.0.2.90
92	10.0.2.91/32	10.0.2.91 – 10.0.2.91	10.0.2.91
93	10.0.2.92/32	10.0.2.92 – 10.0.2.92	10.0.2.92
94	10.0.2.93/32	10.0.2.93 – 10.0.2.93	10.0.2.93
95	10.0.2.94/32	10.0.2.94 – 10.0.2.94	10.0.2.94
96	10.0.2.95/32	10.0.2.95 – 10.0.2.95	10.0.2.95
97	10.0.2.96/32	10.0.2.96 – 10.0.2.96	10.0.2.96
98	10.0.2.97/32	10.0.2.97 – 10.0.2.97	10.0.2.97
99	10.0.2.98/32	10.0.2.98 – 10.0.2.98	10.0.2.98
100	10.0.2.99/32	10.0.2.99 – 10.0.2.99	10.0.2.99
101	10.0.2.100/32	10.0.2.100 – 10.0.2.100	10.0.2.100
102	10.0.2.101/32	10.0.2.101 – 10.0.2.101	10.0.2.101
103	10.0.2.102/32	10.0.2.102 – 10.0.2.102	10.0.2.102
104	10.0.2.103/32	10.0.2.103 – 10.0.2.103	10.0.2.103
105	10.0.2.104/32	10.0.2.104 – 10.0.2.104	10.0.2.104
106	10.0.2.105/32	10.0.2.105 – 10.0.2.105	10.0.2.105
107	10.0.2.106/32	10.0.2.106 – 10.0.2.106	10.0.2.106
108	10.0.2.107/32	10.0.2.107 – 10.0.2.107	10.0.2.107
109	10.0.2.108/32	10.0.2.108 – 10.0.2.108	10.0.2.108
110	10.0.2.109/32	10.0.2.109 – 10.0.2.109	10.0.2.109
111	10.0.2.110/32	10.0.2.110 – 10.0.2.110	10.0.2.110
112	10.0.2.111/32	10.0.2.111 – 10.0.2.111	10.0.2.111
113	10.0.2.112/32	10.0.2.112 – 10.0.2.112	10.0.2.112
114	10.0.2.113/32	10.0.2.113 – 10.0.2.113	10.0.2.113
115	10.0.2.114/32	10.0.2.114 – 10.0.2.114	10.0.2.114
116	10.0.2.115/32	10.0.2.115 – 10.0.2.115	10.0.2.115
117	10.0.2.116/32	10.0.2.116 – 10.0.2.116	10.0.2.116
118	10.0.2.117/32	10.0.2.117 – 10.0.2.117	10.0.2.117
119	10.0.2.118/32	10.0.2.118 – 10.0.2.118	10.0.2.118
120	10.0.2.119/32	10.0.2.119 – 10.0.2.119	10.0.2.119
121	10.0.2.120/32	10.0.2.120 – 10.0.2.120	10.0.2.120
122	10.0.2.121/32	10.0.2.121 – 10.0.2.121	10.0.2.121
123	10.0.2.122/32	10.0.2.122 – 10.0.2.122	10.0.2.122
124	10.0.2.123/32	10.0.2.123 – 10.0.2.123	10.0.2.123
125	10.0.2.124/32	10.0.2.124 – 10.0.2.124	10.0.2.124
126	10.0.2.125/32	10.0.2.125 – 10.0.2.125	10.0.2.125
127	10.0.2.126/32	10.0.2.126 – 10.0.2.126	10.0.2.126
128	10.0.2.127/32	10.0.2.127 – 10.0.2.127	10.0.2.127
129	10.0.2.128/32	10.0.2.128 – 10.0.2.128	10.0.2.128
130	10.0.2.129/32	10.0.2.129 – 10.0.2.129	10.0.2.129
131	10.0.2.130/32	10.0.2.130 – 10.0.2.130	10.0.2.130
132	10.0.2.131/32	10.0.2.131 – 10.0.2.131	10.0.2.131
133	10.0.2.132/32	10.0.2.132 – 10.0.2.132	10.0.2.132
134	10.0.2.133/32	10.0.2.133 – 10.0.2.133	10.0.2.133
135	10.0.2.134/32	10.0.2.134 – 10.0.2.134	10.0.2.134
136	10.0.2.135/32	10.0.2.135 – 10.0.2.135	10.0.2.135
137	10.0.2.136/32	10.0.2.136 – 10.0.2.136	10.0.2.136
138	10.0.2.137/32	10.0.2.137 – 10.0.2.137	10.0.2.137
139	10.0.2.138/32	10.0.2.138 – 10.0.2.138	10.0.2.138
140	10.0.2.139/32	10.0.2.139 – 10.0.2.139	10.0.2.139
141	10.0.2.140/32	10.0.2.140 – 10.0.2.140	10.0.2.140
142	10.0.2.141/32	10.0.2.141 – 10.0.2.141	10.0.2.141
143	10.0.2.142/32	10.0.2.142 – 10.0.2.142	10.0.2.142
144	10.0.2.143/32	10.0.2.143 – 10.0.2.143	10.0.2.143
145	10.0.2.144/32	10.0.2.144 – 10.0.2.144	10.0.2.144
146	10.0.2.145/32	10.0.2.145 – 10.0.2.145	10.0.2.145
147	10.0.2.146/32	10.0.2.146 – 10.0.2.146	10.0.2.146
148	10.0.2.147/32	10.0.2.147 – 10.0.2.147	10.0.2.147
149	10.0.2.148/32	10.0.2.148 – 10.0.2.148	10.0.2.148
150	10.0.2.149/32	10.0.2.149 – 10.0.2.149	10.0.2.149
151	10.0.2.150/32	10.0.2.150 – 10.0.2.150	10.0.2.150
152	10.0.2.151/32	10.0.2.151 – 10.0.2.151	10.0.2.151
153	10.0.2.152/32	10.0.2.152 – 10.0.2.152	10.0.2.152
154	10.0.2.153/32	10.0.2.153 – 10.0.2.153	10.0.2.153
155	10.0.2.154/32	10.0.2.154 – 10.0.2.154	10.0.2.154
156	10.0.2.155/32	10.0.2.155 – 10.0.2.155	10.0.2.155
157	10.0.2.156/32	10.0.2.156 – 10.0.2.156	10.0.2.156
158	10.0.2.157/32	10.0.2.157 – 10.0.2.157	10.0.2.157
159	10.0.2.158/32	10.0.2.158 – 10.0.2.158	10.0.2.158
160	10.0.2.159/32	10.0.2.159 – 10.0.2.159	10.0.2.159
161	10.0.2.160/32	10.0.2.160 – 10.0.2.160	10.0.2.160
162	10.0.2.161/32	10.0.2.161 – 10.0.2.161	10.0.2.161
163	10.0.2.162/32	10.0.2.162 – 10.0.2.162	10.0.2.162
164	10.0.2.163/32	10.0.2.163 – 10.0.2.163	10.0.2.163
165	10.0.2.164/32	10.0.2.164 – 10.0.2.164	10.0.2.164
166	10.0.2.165/32	10.0.2.165 – 10.0.2.165	10.0.2.165
167	10.0.2.166/32	10.0.2.166 – 10.0.2.166	10.0.2.166
168	10.0.2.167/32	10.0.2.167 – 10.0.2.167	10.0.2.167
169	10.0.2.168/32	10.0.2.168 – 10.0.2.168	10.0.2.168
170	10.0.2.169/32	10.0.2.169 – 10.0.2.169	10.0.2.169
171	10.0.2.170/32	10.0.2.170 – 10.0.2.170	10.0.2.170
172	10.0.2.171/32	10.0.2.171 – 10.0.2.171	10.0.2.171
173	10.0.2.172/32	10.0.2.172 – 10.0.2.172	10.0.2.172
174	10.0.2.173/32	10.0.2.173 – 10.0.2.173	10.0.2.173
175	10.0.2.174/32	10.0.2.174 – 10.0.2.174	10.0.2.174
176	10.0.2.175/32	10.0.2.175 – 10.0.2.175	10.0.2.175
177	10.0.2.176/32	10.0.2.176 – 10.0.2.176	10.0.2.176
178	10.0.2.177/32	10.0.2.177 – 10.0.2.177	10.0.2.177
179	10.0.2.178/32	10.0.2.178 – 10.0.2.178	10.0.2.178
180	10.0.2.179/32	10.0.2.179 – 10.0.2.179	10.0.2.179
181	10.0.2.180/32	10.0.2.180 – 10.0.2.180	10.0.2.180
182	10.0.2.181/32	10.0.2.181 – 10.0.2.181	10.0.2.181
183	10.0.2.182/32	10.0.2.182 – 10.0.2.182	10.0.2.182
184	10.0.2.183/32	10.0.2.183 – 10.0.2.183	10.0.2.183
185	10.0.2.184/32	10.0.2.184 – 10.0.2.184	10.0.2.184
186	10.0.2.185/32	10.0.2.185 – 10.0.2.185	10.0.2.185
187	10.0.2.186/32	10.0.2.186 – 10.0.2.186	10.0.2.186
188	10.0.2.187/32	10.0.2.187 – 10.0.2.187	10.0.2.187
189	10.0.2.188/32	10.0.2.188 – 10.0.2.188	10.0.2.188
190	10.0.2.189/32	10.0.2.189 – 10.0.2.189	10.0.2.189
191	10.0.2.190/32	10.0.2.190 – 10.0.2.190	10.0.2.190
192	10.0.2.191/32	10.0.2.191 – 10.0.2.191	10.0.2.191
193	10.0.2.192/32	10.0.2.192 – 10.0.2.192	10.0.2.192
194	10.0.2.193/32	10.0.2.193 – 10.0.2.193	10.0.2.193
195	10.0.2.194/32	10.0.2.194 – 10.0.2.194	10.0.2.194
196	10.0.2.195/32	10.0.2.195 – 10.0.2.195	10.0.2.195
197	10.0.2.196/32	10.0.2.196 – 10.0.2.196	10.0.2.196
198	10.0.2.197/32	10.0.2.197 – 10.0.2.197	10.0.2.197
199	10.0.2.198/32	10.0.2.198 – 10.0.2.198	10.0.2.198
200	10.0.2.199/32	10.0.2.199 – 10.0.2.199	10.0.2.199
201	10.0.2.200/32	10.0.2.200 – 10.0.2.200	10.0.2.200
202	10.0.2.201/32	10.0.2.201 – 10.0.2.201	10.0.2.201
203	10.0.2.202/32	10.0.2.202 – 10.0.2.202	10.0.2.202
204	10.0.2.203/32	10.0.2.203 – 10.0.2.203	10.0.2.203
205	10.0.2.204/32	10.0.2.204 – 10.0.2.204	10.0.2.204
206	10.0.2.205/32	10.0.2.205 – 10.0.2.205	10.0.2.205
207	10.0.2.206/32	10.0.2.206 – 10.0.2.206	10.0.2.206
208	10.0.2.207/32	10.0.2.207 – 10.0.2.207	10.0.2.207
209	10.0.2.208/32	10.0.2.208 – 10.0.2.208	10.0.2.208
210	10.0.2.209/32	10.0.2.209 – 10.0.2.209	10.0.2.209
211	10.0.2.210/32	10.0.2.210 – 10.0.2.210	10.0.2.210
212	10.0.2.211/32	10.0.2.211 – 10.0.2.211	10.0.2.211
213	10.0.2.212/32	10.0.2.212 – 10.0.2.212	10.0.2.212
214	10.0.2.213/32	10.0.2.213 – 10.0.2.213	10.0.2.213
215	10.0.2.214/32	10.0.2.214 – 10.0.2.214	10.0.2.214
216	10.0.2.215/32	10.0.2.215 – 10.0.2.215	10.0.2.215
217	10.0.2.216/32	10.0.2.216 – 10.0.2.216	10.0.2.216
218	10.0.2.217/32	10.0.2.217 – 10.0.2.217	10.0.2.217
219	10.0.2.218/32	10.0.2.218 – 10.0.2.218	10.0.2.218
220	10.0.2.219/32	10.0.2.219 – 10.0.2.219	10.0.2.219
221	10.0.2.220/32	10.0.2.220 – 10.0.2.220	10.0.2.220
222	10.0.2.221/32	10.0.2.221 – 10.0.2.221	10.0.2.221
223	10.0.2.222/32	10.0.2.222 – 10.0.2.222	10.0.2.222
224	10.0.2.223/32	10.0.2.223 – 10.0.2.223	10.0.2.223
225	10.0.2.224/32	10.0.2.224 – 10.0.2.224	10.0.2.224
226	10.0.2.225/32	10.0.2.225 – 10.0.2.225	10.0.2.225
227	10.0.2.226/32	10.0.2.226 – 10.0.2.226	10.0.2.226
228	10.0.2.227/32	10.0.2.227 – 10.0.2.227	10.0.2.227
229	10.0.2.228/32	10.0.2.228 – 10.0.2.228	10.0.2.228
230	10.0.2.229/32	10.0.2.229 – 10.0.2.229	10.0.2.229
231	10.0.2.230/32	10.0.2.230 – 10.0.2.230	10.0.2.230
232	10.0.2.231/32	10.0.2.231 – 10.0.2.231	10.0.2.231
233	10.0.2.232/32	10.0.2.232 – 10.0.2.232	10.0.2.232
234	10.0.2.233/32	10.0.2.233 – 10.0.2.233	10.0.2.233
235	10.0.2.234/32	10.0.2.234 – 10.0.2.234	10.0.2.234
236	10.0.2.235/32	10.0.2.235 – 10.0.2.235	10.0.2.235
237	10.0.2.236/32	10.0.2.236 – 10.0.2.236	10.0.2.236
238	10.0.2.237/32	10.0.2.237 – 10.0.2.237	10.0.2.237
239	10.0.2.238/32	10.0.2.238 – 10.0.2.238	10.0.2.238
240	10.0.2.239/32	10.0.2.239 – 10.0.2.239	10.0.2.239
241	10.0.2.240/32	10.0.2.240 – 10.0.2.240	10.0.2.240
242	10.0.2.241/32	10.0.2.241 – 10.0.2.241	10.0.2.241
243	10.0.2.242/32	10.0.2.242 – 10.0.2.242	10.0.2.242
244	10.0.2.243/32	10.0.2.243 – 10.0.2.243	10.0.2.243
245	10.0.2.244/32	10.0.2.244 – 10.0.2.244	10.0.2.244
246	10.0.2.245/32	10.0.2.245 – 10.0.2.245	10.0.2.245
247	10.0.2.246/32	10.0.2.246 – 10.0.2.246	10.0.2.246
248	10.0.2.247/32	10.0.2.247 – 10.0.2.247	10.0.2.247
249	10.0.2.248/32	10.0.2.248 – 10.0.2.248	10.0.2.248
250	10.0.2.249/32	10.0.2.249 – 10.0.2.249	10.0.2.249
251	10.0.2.250/32	10.0.2.250 – 10.0.2.250	10.0.2.250
252	10.0.2.251/32	10.0.2.251 – 10.0.2.251	10.0.2.251
253	10.0.2.252/32	10.0.2.252 – 10.0.2.252	10.0.2.252
254	10.0.2.253/32	10.0.2.253 – 10.0.2.253	10.0.2.253
255	10.0.2.254/32	10.0.2.254 – 10.0.2.254	10.0.2.254
256	10.0.2.255/32	10.0.2.255 – 10.0.2.255	10.0.2.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /24
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →