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)10.3.162.0/23

network10.3.162.0/23

broadcast10.3.163.255

first host10.3.162.1

last host10.3.163.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.162.0/23

address00001010.00000011.10100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.10100010.00000000

broadcast00001010.00000011.10100011.11111111

green = network part, grey = host part

hex0x0a03a200

decimal168010240

reverse dns0.162.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a200

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.162.0/31	10.3.162.0 – 10.3.162.1	10.3.162.1
2	10.3.162.2/31	10.3.162.2 – 10.3.162.3	10.3.162.3
3	10.3.162.4/31	10.3.162.4 – 10.3.162.5	10.3.162.5
4	10.3.162.6/31	10.3.162.6 – 10.3.162.7	10.3.162.7
5	10.3.162.8/31	10.3.162.8 – 10.3.162.9	10.3.162.9
6	10.3.162.10/31	10.3.162.10 – 10.3.162.11	10.3.162.11
7	10.3.162.12/31	10.3.162.12 – 10.3.162.13	10.3.162.13
8	10.3.162.14/31	10.3.162.14 – 10.3.162.15	10.3.162.15
9	10.3.162.16/31	10.3.162.16 – 10.3.162.17	10.3.162.17
10	10.3.162.18/31	10.3.162.18 – 10.3.162.19	10.3.162.19
11	10.3.162.20/31	10.3.162.20 – 10.3.162.21	10.3.162.21
12	10.3.162.22/31	10.3.162.22 – 10.3.162.23	10.3.162.23
13	10.3.162.24/31	10.3.162.24 – 10.3.162.25	10.3.162.25
14	10.3.162.26/31	10.3.162.26 – 10.3.162.27	10.3.162.27
15	10.3.162.28/31	10.3.162.28 – 10.3.162.29	10.3.162.29
16	10.3.162.30/31	10.3.162.30 – 10.3.162.31	10.3.162.31
17	10.3.162.32/31	10.3.162.32 – 10.3.162.33	10.3.162.33
18	10.3.162.34/31	10.3.162.34 – 10.3.162.35	10.3.162.35
19	10.3.162.36/31	10.3.162.36 – 10.3.162.37	10.3.162.37
20	10.3.162.38/31	10.3.162.38 – 10.3.162.39	10.3.162.39
21	10.3.162.40/31	10.3.162.40 – 10.3.162.41	10.3.162.41
22	10.3.162.42/31	10.3.162.42 – 10.3.162.43	10.3.162.43
23	10.3.162.44/31	10.3.162.44 – 10.3.162.45	10.3.162.45
24	10.3.162.46/31	10.3.162.46 – 10.3.162.47	10.3.162.47
25	10.3.162.48/31	10.3.162.48 – 10.3.162.49	10.3.162.49
26	10.3.162.50/31	10.3.162.50 – 10.3.162.51	10.3.162.51
27	10.3.162.52/31	10.3.162.52 – 10.3.162.53	10.3.162.53
28	10.3.162.54/31	10.3.162.54 – 10.3.162.55	10.3.162.55
29	10.3.162.56/31	10.3.162.56 – 10.3.162.57	10.3.162.57
30	10.3.162.58/31	10.3.162.58 – 10.3.162.59	10.3.162.59
31	10.3.162.60/31	10.3.162.60 – 10.3.162.61	10.3.162.61
32	10.3.162.62/31	10.3.162.62 – 10.3.162.63	10.3.162.63
33	10.3.162.64/31	10.3.162.64 – 10.3.162.65	10.3.162.65
34	10.3.162.66/31	10.3.162.66 – 10.3.162.67	10.3.162.67
35	10.3.162.68/31	10.3.162.68 – 10.3.162.69	10.3.162.69
36	10.3.162.70/31	10.3.162.70 – 10.3.162.71	10.3.162.71
37	10.3.162.72/31	10.3.162.72 – 10.3.162.73	10.3.162.73
38	10.3.162.74/31	10.3.162.74 – 10.3.162.75	10.3.162.75
39	10.3.162.76/31	10.3.162.76 – 10.3.162.77	10.3.162.77
40	10.3.162.78/31	10.3.162.78 – 10.3.162.79	10.3.162.79
41	10.3.162.80/31	10.3.162.80 – 10.3.162.81	10.3.162.81
42	10.3.162.82/31	10.3.162.82 – 10.3.162.83	10.3.162.83
43	10.3.162.84/31	10.3.162.84 – 10.3.162.85	10.3.162.85
44	10.3.162.86/31	10.3.162.86 – 10.3.162.87	10.3.162.87
45	10.3.162.88/31	10.3.162.88 – 10.3.162.89	10.3.162.89
46	10.3.162.90/31	10.3.162.90 – 10.3.162.91	10.3.162.91
47	10.3.162.92/31	10.3.162.92 – 10.3.162.93	10.3.162.93
48	10.3.162.94/31	10.3.162.94 – 10.3.162.95	10.3.162.95
49	10.3.162.96/31	10.3.162.96 – 10.3.162.97	10.3.162.97
50	10.3.162.98/31	10.3.162.98 – 10.3.162.99	10.3.162.99
51	10.3.162.100/31	10.3.162.100 – 10.3.162.101	10.3.162.101
52	10.3.162.102/31	10.3.162.102 – 10.3.162.103	10.3.162.103
53	10.3.162.104/31	10.3.162.104 – 10.3.162.105	10.3.162.105
54	10.3.162.106/31	10.3.162.106 – 10.3.162.107	10.3.162.107
55	10.3.162.108/31	10.3.162.108 – 10.3.162.109	10.3.162.109
56	10.3.162.110/31	10.3.162.110 – 10.3.162.111	10.3.162.111
57	10.3.162.112/31	10.3.162.112 – 10.3.162.113	10.3.162.113
58	10.3.162.114/31	10.3.162.114 – 10.3.162.115	10.3.162.115
59	10.3.162.116/31	10.3.162.116 – 10.3.162.117	10.3.162.117
60	10.3.162.118/31	10.3.162.118 – 10.3.162.119	10.3.162.119
61	10.3.162.120/31	10.3.162.120 – 10.3.162.121	10.3.162.121
62	10.3.162.122/31	10.3.162.122 – 10.3.162.123	10.3.162.123
63	10.3.162.124/31	10.3.162.124 – 10.3.162.125	10.3.162.125
64	10.3.162.126/31	10.3.162.126 – 10.3.162.127	10.3.162.127
65	10.3.162.128/31	10.3.162.128 – 10.3.162.129	10.3.162.129
66	10.3.162.130/31	10.3.162.130 – 10.3.162.131	10.3.162.131
67	10.3.162.132/31	10.3.162.132 – 10.3.162.133	10.3.162.133
68	10.3.162.134/31	10.3.162.134 – 10.3.162.135	10.3.162.135
69	10.3.162.136/31	10.3.162.136 – 10.3.162.137	10.3.162.137
70	10.3.162.138/31	10.3.162.138 – 10.3.162.139	10.3.162.139
71	10.3.162.140/31	10.3.162.140 – 10.3.162.141	10.3.162.141
72	10.3.162.142/31	10.3.162.142 – 10.3.162.143	10.3.162.143
73	10.3.162.144/31	10.3.162.144 – 10.3.162.145	10.3.162.145
74	10.3.162.146/31	10.3.162.146 – 10.3.162.147	10.3.162.147
75	10.3.162.148/31	10.3.162.148 – 10.3.162.149	10.3.162.149
76	10.3.162.150/31	10.3.162.150 – 10.3.162.151	10.3.162.151
77	10.3.162.152/31	10.3.162.152 – 10.3.162.153	10.3.162.153
78	10.3.162.154/31	10.3.162.154 – 10.3.162.155	10.3.162.155
79	10.3.162.156/31	10.3.162.156 – 10.3.162.157	10.3.162.157
80	10.3.162.158/31	10.3.162.158 – 10.3.162.159	10.3.162.159
81	10.3.162.160/31	10.3.162.160 – 10.3.162.161	10.3.162.161
82	10.3.162.162/31	10.3.162.162 – 10.3.162.163	10.3.162.163
83	10.3.162.164/31	10.3.162.164 – 10.3.162.165	10.3.162.165
84	10.3.162.166/31	10.3.162.166 – 10.3.162.167	10.3.162.167
85	10.3.162.168/31	10.3.162.168 – 10.3.162.169	10.3.162.169
86	10.3.162.170/31	10.3.162.170 – 10.3.162.171	10.3.162.171
87	10.3.162.172/31	10.3.162.172 – 10.3.162.173	10.3.162.173
88	10.3.162.174/31	10.3.162.174 – 10.3.162.175	10.3.162.175
89	10.3.162.176/31	10.3.162.176 – 10.3.162.177	10.3.162.177
90	10.3.162.178/31	10.3.162.178 – 10.3.162.179	10.3.162.179
91	10.3.162.180/31	10.3.162.180 – 10.3.162.181	10.3.162.181
92	10.3.162.182/31	10.3.162.182 – 10.3.162.183	10.3.162.183
93	10.3.162.184/31	10.3.162.184 – 10.3.162.185	10.3.162.185
94	10.3.162.186/31	10.3.162.186 – 10.3.162.187	10.3.162.187
95	10.3.162.188/31	10.3.162.188 – 10.3.162.189	10.3.162.189
96	10.3.162.190/31	10.3.162.190 – 10.3.162.191	10.3.162.191
97	10.3.162.192/31	10.3.162.192 – 10.3.162.193	10.3.162.193
98	10.3.162.194/31	10.3.162.194 – 10.3.162.195	10.3.162.195
99	10.3.162.196/31	10.3.162.196 – 10.3.162.197	10.3.162.197
100	10.3.162.198/31	10.3.162.198 – 10.3.162.199	10.3.162.199
101	10.3.162.200/31	10.3.162.200 – 10.3.162.201	10.3.162.201
102	10.3.162.202/31	10.3.162.202 – 10.3.162.203	10.3.162.203
103	10.3.162.204/31	10.3.162.204 – 10.3.162.205	10.3.162.205
104	10.3.162.206/31	10.3.162.206 – 10.3.162.207	10.3.162.207
105	10.3.162.208/31	10.3.162.208 – 10.3.162.209	10.3.162.209
106	10.3.162.210/31	10.3.162.210 – 10.3.162.211	10.3.162.211
107	10.3.162.212/31	10.3.162.212 – 10.3.162.213	10.3.162.213
108	10.3.162.214/31	10.3.162.214 – 10.3.162.215	10.3.162.215
109	10.3.162.216/31	10.3.162.216 – 10.3.162.217	10.3.162.217
110	10.3.162.218/31	10.3.162.218 – 10.3.162.219	10.3.162.219
111	10.3.162.220/31	10.3.162.220 – 10.3.162.221	10.3.162.221
112	10.3.162.222/31	10.3.162.222 – 10.3.162.223	10.3.162.223
113	10.3.162.224/31	10.3.162.224 – 10.3.162.225	10.3.162.225
114	10.3.162.226/31	10.3.162.226 – 10.3.162.227	10.3.162.227
115	10.3.162.228/31	10.3.162.228 – 10.3.162.229	10.3.162.229
116	10.3.162.230/31	10.3.162.230 – 10.3.162.231	10.3.162.231
117	10.3.162.232/31	10.3.162.232 – 10.3.162.233	10.3.162.233
118	10.3.162.234/31	10.3.162.234 – 10.3.162.235	10.3.162.235
119	10.3.162.236/31	10.3.162.236 – 10.3.162.237	10.3.162.237
120	10.3.162.238/31	10.3.162.238 – 10.3.162.239	10.3.162.239
121	10.3.162.240/31	10.3.162.240 – 10.3.162.241	10.3.162.241
122	10.3.162.242/31	10.3.162.242 – 10.3.162.243	10.3.162.243
123	10.3.162.244/31	10.3.162.244 – 10.3.162.245	10.3.162.245
124	10.3.162.246/31	10.3.162.246 – 10.3.162.247	10.3.162.247
125	10.3.162.248/31	10.3.162.248 – 10.3.162.249	10.3.162.249
126	10.3.162.250/31	10.3.162.250 – 10.3.162.251	10.3.162.251
127	10.3.162.252/31	10.3.162.252 – 10.3.162.253	10.3.162.253
128	10.3.162.254/31	10.3.162.254 – 10.3.162.255	10.3.162.255
129	10.3.163.0/31	10.3.163.0 – 10.3.163.1	10.3.163.1
130	10.3.163.2/31	10.3.163.2 – 10.3.163.3	10.3.163.3
131	10.3.163.4/31	10.3.163.4 – 10.3.163.5	10.3.163.5
132	10.3.163.6/31	10.3.163.6 – 10.3.163.7	10.3.163.7
133	10.3.163.8/31	10.3.163.8 – 10.3.163.9	10.3.163.9
134	10.3.163.10/31	10.3.163.10 – 10.3.163.11	10.3.163.11
135	10.3.163.12/31	10.3.163.12 – 10.3.163.13	10.3.163.13
136	10.3.163.14/31	10.3.163.14 – 10.3.163.15	10.3.163.15
137	10.3.163.16/31	10.3.163.16 – 10.3.163.17	10.3.163.17
138	10.3.163.18/31	10.3.163.18 – 10.3.163.19	10.3.163.19
139	10.3.163.20/31	10.3.163.20 – 10.3.163.21	10.3.163.21
140	10.3.163.22/31	10.3.163.22 – 10.3.163.23	10.3.163.23
141	10.3.163.24/31	10.3.163.24 – 10.3.163.25	10.3.163.25
142	10.3.163.26/31	10.3.163.26 – 10.3.163.27	10.3.163.27
143	10.3.163.28/31	10.3.163.28 – 10.3.163.29	10.3.163.29
144	10.3.163.30/31	10.3.163.30 – 10.3.163.31	10.3.163.31
145	10.3.163.32/31	10.3.163.32 – 10.3.163.33	10.3.163.33
146	10.3.163.34/31	10.3.163.34 – 10.3.163.35	10.3.163.35
147	10.3.163.36/31	10.3.163.36 – 10.3.163.37	10.3.163.37
148	10.3.163.38/31	10.3.163.38 – 10.3.163.39	10.3.163.39
149	10.3.163.40/31	10.3.163.40 – 10.3.163.41	10.3.163.41
150	10.3.163.42/31	10.3.163.42 – 10.3.163.43	10.3.163.43
151	10.3.163.44/31	10.3.163.44 – 10.3.163.45	10.3.163.45
152	10.3.163.46/31	10.3.163.46 – 10.3.163.47	10.3.163.47
153	10.3.163.48/31	10.3.163.48 – 10.3.163.49	10.3.163.49
154	10.3.163.50/31	10.3.163.50 – 10.3.163.51	10.3.163.51
155	10.3.163.52/31	10.3.163.52 – 10.3.163.53	10.3.163.53
156	10.3.163.54/31	10.3.163.54 – 10.3.163.55	10.3.163.55
157	10.3.163.56/31	10.3.163.56 – 10.3.163.57	10.3.163.57
158	10.3.163.58/31	10.3.163.58 – 10.3.163.59	10.3.163.59
159	10.3.163.60/31	10.3.163.60 – 10.3.163.61	10.3.163.61
160	10.3.163.62/31	10.3.163.62 – 10.3.163.63	10.3.163.63
161	10.3.163.64/31	10.3.163.64 – 10.3.163.65	10.3.163.65
162	10.3.163.66/31	10.3.163.66 – 10.3.163.67	10.3.163.67
163	10.3.163.68/31	10.3.163.68 – 10.3.163.69	10.3.163.69
164	10.3.163.70/31	10.3.163.70 – 10.3.163.71	10.3.163.71
165	10.3.163.72/31	10.3.163.72 – 10.3.163.73	10.3.163.73
166	10.3.163.74/31	10.3.163.74 – 10.3.163.75	10.3.163.75
167	10.3.163.76/31	10.3.163.76 – 10.3.163.77	10.3.163.77
168	10.3.163.78/31	10.3.163.78 – 10.3.163.79	10.3.163.79
169	10.3.163.80/31	10.3.163.80 – 10.3.163.81	10.3.163.81
170	10.3.163.82/31	10.3.163.82 – 10.3.163.83	10.3.163.83
171	10.3.163.84/31	10.3.163.84 – 10.3.163.85	10.3.163.85
172	10.3.163.86/31	10.3.163.86 – 10.3.163.87	10.3.163.87
173	10.3.163.88/31	10.3.163.88 – 10.3.163.89	10.3.163.89
174	10.3.163.90/31	10.3.163.90 – 10.3.163.91	10.3.163.91
175	10.3.163.92/31	10.3.163.92 – 10.3.163.93	10.3.163.93
176	10.3.163.94/31	10.3.163.94 – 10.3.163.95	10.3.163.95
177	10.3.163.96/31	10.3.163.96 – 10.3.163.97	10.3.163.97
178	10.3.163.98/31	10.3.163.98 – 10.3.163.99	10.3.163.99
179	10.3.163.100/31	10.3.163.100 – 10.3.163.101	10.3.163.101
180	10.3.163.102/31	10.3.163.102 – 10.3.163.103	10.3.163.103
181	10.3.163.104/31	10.3.163.104 – 10.3.163.105	10.3.163.105
182	10.3.163.106/31	10.3.163.106 – 10.3.163.107	10.3.163.107
183	10.3.163.108/31	10.3.163.108 – 10.3.163.109	10.3.163.109
184	10.3.163.110/31	10.3.163.110 – 10.3.163.111	10.3.163.111
185	10.3.163.112/31	10.3.163.112 – 10.3.163.113	10.3.163.113
186	10.3.163.114/31	10.3.163.114 – 10.3.163.115	10.3.163.115
187	10.3.163.116/31	10.3.163.116 – 10.3.163.117	10.3.163.117
188	10.3.163.118/31	10.3.163.118 – 10.3.163.119	10.3.163.119
189	10.3.163.120/31	10.3.163.120 – 10.3.163.121	10.3.163.121
190	10.3.163.122/31	10.3.163.122 – 10.3.163.123	10.3.163.123
191	10.3.163.124/31	10.3.163.124 – 10.3.163.125	10.3.163.125
192	10.3.163.126/31	10.3.163.126 – 10.3.163.127	10.3.163.127
193	10.3.163.128/31	10.3.163.128 – 10.3.163.129	10.3.163.129
194	10.3.163.130/31	10.3.163.130 – 10.3.163.131	10.3.163.131
195	10.3.163.132/31	10.3.163.132 – 10.3.163.133	10.3.163.133
196	10.3.163.134/31	10.3.163.134 – 10.3.163.135	10.3.163.135
197	10.3.163.136/31	10.3.163.136 – 10.3.163.137	10.3.163.137
198	10.3.163.138/31	10.3.163.138 – 10.3.163.139	10.3.163.139
199	10.3.163.140/31	10.3.163.140 – 10.3.163.141	10.3.163.141
200	10.3.163.142/31	10.3.163.142 – 10.3.163.143	10.3.163.143
201	10.3.163.144/31	10.3.163.144 – 10.3.163.145	10.3.163.145
202	10.3.163.146/31	10.3.163.146 – 10.3.163.147	10.3.163.147
203	10.3.163.148/31	10.3.163.148 – 10.3.163.149	10.3.163.149
204	10.3.163.150/31	10.3.163.150 – 10.3.163.151	10.3.163.151
205	10.3.163.152/31	10.3.163.152 – 10.3.163.153	10.3.163.153
206	10.3.163.154/31	10.3.163.154 – 10.3.163.155	10.3.163.155
207	10.3.163.156/31	10.3.163.156 – 10.3.163.157	10.3.163.157
208	10.3.163.158/31	10.3.163.158 – 10.3.163.159	10.3.163.159
209	10.3.163.160/31	10.3.163.160 – 10.3.163.161	10.3.163.161
210	10.3.163.162/31	10.3.163.162 – 10.3.163.163	10.3.163.163
211	10.3.163.164/31	10.3.163.164 – 10.3.163.165	10.3.163.165
212	10.3.163.166/31	10.3.163.166 – 10.3.163.167	10.3.163.167
213	10.3.163.168/31	10.3.163.168 – 10.3.163.169	10.3.163.169
214	10.3.163.170/31	10.3.163.170 – 10.3.163.171	10.3.163.171
215	10.3.163.172/31	10.3.163.172 – 10.3.163.173	10.3.163.173
216	10.3.163.174/31	10.3.163.174 – 10.3.163.175	10.3.163.175
217	10.3.163.176/31	10.3.163.176 – 10.3.163.177	10.3.163.177
218	10.3.163.178/31	10.3.163.178 – 10.3.163.179	10.3.163.179
219	10.3.163.180/31	10.3.163.180 – 10.3.163.181	10.3.163.181
220	10.3.163.182/31	10.3.163.182 – 10.3.163.183	10.3.163.183
221	10.3.163.184/31	10.3.163.184 – 10.3.163.185	10.3.163.185
222	10.3.163.186/31	10.3.163.186 – 10.3.163.187	10.3.163.187
223	10.3.163.188/31	10.3.163.188 – 10.3.163.189	10.3.163.189
224	10.3.163.190/31	10.3.163.190 – 10.3.163.191	10.3.163.191
225	10.3.163.192/31	10.3.163.192 – 10.3.163.193	10.3.163.193
226	10.3.163.194/31	10.3.163.194 – 10.3.163.195	10.3.163.195
227	10.3.163.196/31	10.3.163.196 – 10.3.163.197	10.3.163.197
228	10.3.163.198/31	10.3.163.198 – 10.3.163.199	10.3.163.199
229	10.3.163.200/31	10.3.163.200 – 10.3.163.201	10.3.163.201
230	10.3.163.202/31	10.3.163.202 – 10.3.163.203	10.3.163.203
231	10.3.163.204/31	10.3.163.204 – 10.3.163.205	10.3.163.205
232	10.3.163.206/31	10.3.163.206 – 10.3.163.207	10.3.163.207
233	10.3.163.208/31	10.3.163.208 – 10.3.163.209	10.3.163.209
234	10.3.163.210/31	10.3.163.210 – 10.3.163.211	10.3.163.211
235	10.3.163.212/31	10.3.163.212 – 10.3.163.213	10.3.163.213
236	10.3.163.214/31	10.3.163.214 – 10.3.163.215	10.3.163.215
237	10.3.163.216/31	10.3.163.216 – 10.3.163.217	10.3.163.217
238	10.3.163.218/31	10.3.163.218 – 10.3.163.219	10.3.163.219
239	10.3.163.220/31	10.3.163.220 – 10.3.163.221	10.3.163.221
240	10.3.163.222/31	10.3.163.222 – 10.3.163.223	10.3.163.223
241	10.3.163.224/31	10.3.163.224 – 10.3.163.225	10.3.163.225
242	10.3.163.226/31	10.3.163.226 – 10.3.163.227	10.3.163.227
243	10.3.163.228/31	10.3.163.228 – 10.3.163.229	10.3.163.229
244	10.3.163.230/31	10.3.163.230 – 10.3.163.231	10.3.163.231
245	10.3.163.232/31	10.3.163.232 – 10.3.163.233	10.3.163.233
246	10.3.163.234/31	10.3.163.234 – 10.3.163.235	10.3.163.235
247	10.3.163.236/31	10.3.163.236 – 10.3.163.237	10.3.163.237
248	10.3.163.238/31	10.3.163.238 – 10.3.163.239	10.3.163.239
249	10.3.163.240/31	10.3.163.240 – 10.3.163.241	10.3.163.241
250	10.3.163.242/31	10.3.163.242 – 10.3.163.243	10.3.163.243
251	10.3.163.244/31	10.3.163.244 – 10.3.163.245	10.3.163.245
252	10.3.163.246/31	10.3.163.246 – 10.3.163.247	10.3.163.247
253	10.3.163.248/31	10.3.163.248 – 10.3.163.249	10.3.163.249
254	10.3.163.250/31	10.3.163.250 – 10.3.163.251	10.3.163.251
255	10.3.163.252/31	10.3.163.252 – 10.3.163.253	10.3.163.253
256	10.3.163.254/31	10.3.163.254 – 10.3.163.255	10.3.163.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →