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)10.166.68.0/22

network10.166.68.0/22

broadcast10.166.71.255

first host10.166.68.1

last host10.166.71.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.166.68.0/22

address00001010.10100110.01000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10100110.01000100.00000000

broadcast00001010.10100110.01000111.11111111

green = network part, grey = host part

hex0x0aa64400

decimal178668544

reverse dns0.68.166.10.in-addr.arpa

ipv4-mapped::ffff:aa6:4400

/22 split into /31 · 512 subnets

close ×

#	network	host range	broadcast
1	10.166.68.0/31	10.166.68.0 – 10.166.68.1	10.166.68.1
2	10.166.68.2/31	10.166.68.2 – 10.166.68.3	10.166.68.3
3	10.166.68.4/31	10.166.68.4 – 10.166.68.5	10.166.68.5
4	10.166.68.6/31	10.166.68.6 – 10.166.68.7	10.166.68.7
5	10.166.68.8/31	10.166.68.8 – 10.166.68.9	10.166.68.9
6	10.166.68.10/31	10.166.68.10 – 10.166.68.11	10.166.68.11
7	10.166.68.12/31	10.166.68.12 – 10.166.68.13	10.166.68.13
8	10.166.68.14/31	10.166.68.14 – 10.166.68.15	10.166.68.15
9	10.166.68.16/31	10.166.68.16 – 10.166.68.17	10.166.68.17
10	10.166.68.18/31	10.166.68.18 – 10.166.68.19	10.166.68.19
11	10.166.68.20/31	10.166.68.20 – 10.166.68.21	10.166.68.21
12	10.166.68.22/31	10.166.68.22 – 10.166.68.23	10.166.68.23
13	10.166.68.24/31	10.166.68.24 – 10.166.68.25	10.166.68.25
14	10.166.68.26/31	10.166.68.26 – 10.166.68.27	10.166.68.27
15	10.166.68.28/31	10.166.68.28 – 10.166.68.29	10.166.68.29
16	10.166.68.30/31	10.166.68.30 – 10.166.68.31	10.166.68.31
17	10.166.68.32/31	10.166.68.32 – 10.166.68.33	10.166.68.33
18	10.166.68.34/31	10.166.68.34 – 10.166.68.35	10.166.68.35
19	10.166.68.36/31	10.166.68.36 – 10.166.68.37	10.166.68.37
20	10.166.68.38/31	10.166.68.38 – 10.166.68.39	10.166.68.39
21	10.166.68.40/31	10.166.68.40 – 10.166.68.41	10.166.68.41
22	10.166.68.42/31	10.166.68.42 – 10.166.68.43	10.166.68.43
23	10.166.68.44/31	10.166.68.44 – 10.166.68.45	10.166.68.45
24	10.166.68.46/31	10.166.68.46 – 10.166.68.47	10.166.68.47
25	10.166.68.48/31	10.166.68.48 – 10.166.68.49	10.166.68.49
26	10.166.68.50/31	10.166.68.50 – 10.166.68.51	10.166.68.51
27	10.166.68.52/31	10.166.68.52 – 10.166.68.53	10.166.68.53
28	10.166.68.54/31	10.166.68.54 – 10.166.68.55	10.166.68.55
29	10.166.68.56/31	10.166.68.56 – 10.166.68.57	10.166.68.57
30	10.166.68.58/31	10.166.68.58 – 10.166.68.59	10.166.68.59
31	10.166.68.60/31	10.166.68.60 – 10.166.68.61	10.166.68.61
32	10.166.68.62/31	10.166.68.62 – 10.166.68.63	10.166.68.63
33	10.166.68.64/31	10.166.68.64 – 10.166.68.65	10.166.68.65
34	10.166.68.66/31	10.166.68.66 – 10.166.68.67	10.166.68.67
35	10.166.68.68/31	10.166.68.68 – 10.166.68.69	10.166.68.69
36	10.166.68.70/31	10.166.68.70 – 10.166.68.71	10.166.68.71
37	10.166.68.72/31	10.166.68.72 – 10.166.68.73	10.166.68.73
38	10.166.68.74/31	10.166.68.74 – 10.166.68.75	10.166.68.75
39	10.166.68.76/31	10.166.68.76 – 10.166.68.77	10.166.68.77
40	10.166.68.78/31	10.166.68.78 – 10.166.68.79	10.166.68.79
41	10.166.68.80/31	10.166.68.80 – 10.166.68.81	10.166.68.81
42	10.166.68.82/31	10.166.68.82 – 10.166.68.83	10.166.68.83
43	10.166.68.84/31	10.166.68.84 – 10.166.68.85	10.166.68.85
44	10.166.68.86/31	10.166.68.86 – 10.166.68.87	10.166.68.87
45	10.166.68.88/31	10.166.68.88 – 10.166.68.89	10.166.68.89
46	10.166.68.90/31	10.166.68.90 – 10.166.68.91	10.166.68.91
47	10.166.68.92/31	10.166.68.92 – 10.166.68.93	10.166.68.93
48	10.166.68.94/31	10.166.68.94 – 10.166.68.95	10.166.68.95
49	10.166.68.96/31	10.166.68.96 – 10.166.68.97	10.166.68.97
50	10.166.68.98/31	10.166.68.98 – 10.166.68.99	10.166.68.99
51	10.166.68.100/31	10.166.68.100 – 10.166.68.101	10.166.68.101
52	10.166.68.102/31	10.166.68.102 – 10.166.68.103	10.166.68.103
53	10.166.68.104/31	10.166.68.104 – 10.166.68.105	10.166.68.105
54	10.166.68.106/31	10.166.68.106 – 10.166.68.107	10.166.68.107
55	10.166.68.108/31	10.166.68.108 – 10.166.68.109	10.166.68.109
56	10.166.68.110/31	10.166.68.110 – 10.166.68.111	10.166.68.111
57	10.166.68.112/31	10.166.68.112 – 10.166.68.113	10.166.68.113
58	10.166.68.114/31	10.166.68.114 – 10.166.68.115	10.166.68.115
59	10.166.68.116/31	10.166.68.116 – 10.166.68.117	10.166.68.117
60	10.166.68.118/31	10.166.68.118 – 10.166.68.119	10.166.68.119
61	10.166.68.120/31	10.166.68.120 – 10.166.68.121	10.166.68.121
62	10.166.68.122/31	10.166.68.122 – 10.166.68.123	10.166.68.123
63	10.166.68.124/31	10.166.68.124 – 10.166.68.125	10.166.68.125
64	10.166.68.126/31	10.166.68.126 – 10.166.68.127	10.166.68.127
65	10.166.68.128/31	10.166.68.128 – 10.166.68.129	10.166.68.129
66	10.166.68.130/31	10.166.68.130 – 10.166.68.131	10.166.68.131
67	10.166.68.132/31	10.166.68.132 – 10.166.68.133	10.166.68.133
68	10.166.68.134/31	10.166.68.134 – 10.166.68.135	10.166.68.135
69	10.166.68.136/31	10.166.68.136 – 10.166.68.137	10.166.68.137
70	10.166.68.138/31	10.166.68.138 – 10.166.68.139	10.166.68.139
71	10.166.68.140/31	10.166.68.140 – 10.166.68.141	10.166.68.141
72	10.166.68.142/31	10.166.68.142 – 10.166.68.143	10.166.68.143
73	10.166.68.144/31	10.166.68.144 – 10.166.68.145	10.166.68.145
74	10.166.68.146/31	10.166.68.146 – 10.166.68.147	10.166.68.147
75	10.166.68.148/31	10.166.68.148 – 10.166.68.149	10.166.68.149
76	10.166.68.150/31	10.166.68.150 – 10.166.68.151	10.166.68.151
77	10.166.68.152/31	10.166.68.152 – 10.166.68.153	10.166.68.153
78	10.166.68.154/31	10.166.68.154 – 10.166.68.155	10.166.68.155
79	10.166.68.156/31	10.166.68.156 – 10.166.68.157	10.166.68.157
80	10.166.68.158/31	10.166.68.158 – 10.166.68.159	10.166.68.159
81	10.166.68.160/31	10.166.68.160 – 10.166.68.161	10.166.68.161
82	10.166.68.162/31	10.166.68.162 – 10.166.68.163	10.166.68.163
83	10.166.68.164/31	10.166.68.164 – 10.166.68.165	10.166.68.165
84	10.166.68.166/31	10.166.68.166 – 10.166.68.167	10.166.68.167
85	10.166.68.168/31	10.166.68.168 – 10.166.68.169	10.166.68.169
86	10.166.68.170/31	10.166.68.170 – 10.166.68.171	10.166.68.171
87	10.166.68.172/31	10.166.68.172 – 10.166.68.173	10.166.68.173
88	10.166.68.174/31	10.166.68.174 – 10.166.68.175	10.166.68.175
89	10.166.68.176/31	10.166.68.176 – 10.166.68.177	10.166.68.177
90	10.166.68.178/31	10.166.68.178 – 10.166.68.179	10.166.68.179
91	10.166.68.180/31	10.166.68.180 – 10.166.68.181	10.166.68.181
92	10.166.68.182/31	10.166.68.182 – 10.166.68.183	10.166.68.183
93	10.166.68.184/31	10.166.68.184 – 10.166.68.185	10.166.68.185
94	10.166.68.186/31	10.166.68.186 – 10.166.68.187	10.166.68.187
95	10.166.68.188/31	10.166.68.188 – 10.166.68.189	10.166.68.189
96	10.166.68.190/31	10.166.68.190 – 10.166.68.191	10.166.68.191
97	10.166.68.192/31	10.166.68.192 – 10.166.68.193	10.166.68.193
98	10.166.68.194/31	10.166.68.194 – 10.166.68.195	10.166.68.195
99	10.166.68.196/31	10.166.68.196 – 10.166.68.197	10.166.68.197
100	10.166.68.198/31	10.166.68.198 – 10.166.68.199	10.166.68.199
101	10.166.68.200/31	10.166.68.200 – 10.166.68.201	10.166.68.201
102	10.166.68.202/31	10.166.68.202 – 10.166.68.203	10.166.68.203
103	10.166.68.204/31	10.166.68.204 – 10.166.68.205	10.166.68.205
104	10.166.68.206/31	10.166.68.206 – 10.166.68.207	10.166.68.207
105	10.166.68.208/31	10.166.68.208 – 10.166.68.209	10.166.68.209
106	10.166.68.210/31	10.166.68.210 – 10.166.68.211	10.166.68.211
107	10.166.68.212/31	10.166.68.212 – 10.166.68.213	10.166.68.213
108	10.166.68.214/31	10.166.68.214 – 10.166.68.215	10.166.68.215
109	10.166.68.216/31	10.166.68.216 – 10.166.68.217	10.166.68.217
110	10.166.68.218/31	10.166.68.218 – 10.166.68.219	10.166.68.219
111	10.166.68.220/31	10.166.68.220 – 10.166.68.221	10.166.68.221
112	10.166.68.222/31	10.166.68.222 – 10.166.68.223	10.166.68.223
113	10.166.68.224/31	10.166.68.224 – 10.166.68.225	10.166.68.225
114	10.166.68.226/31	10.166.68.226 – 10.166.68.227	10.166.68.227
115	10.166.68.228/31	10.166.68.228 – 10.166.68.229	10.166.68.229
116	10.166.68.230/31	10.166.68.230 – 10.166.68.231	10.166.68.231
117	10.166.68.232/31	10.166.68.232 – 10.166.68.233	10.166.68.233
118	10.166.68.234/31	10.166.68.234 – 10.166.68.235	10.166.68.235
119	10.166.68.236/31	10.166.68.236 – 10.166.68.237	10.166.68.237
120	10.166.68.238/31	10.166.68.238 – 10.166.68.239	10.166.68.239
121	10.166.68.240/31	10.166.68.240 – 10.166.68.241	10.166.68.241
122	10.166.68.242/31	10.166.68.242 – 10.166.68.243	10.166.68.243
123	10.166.68.244/31	10.166.68.244 – 10.166.68.245	10.166.68.245
124	10.166.68.246/31	10.166.68.246 – 10.166.68.247	10.166.68.247
125	10.166.68.248/31	10.166.68.248 – 10.166.68.249	10.166.68.249
126	10.166.68.250/31	10.166.68.250 – 10.166.68.251	10.166.68.251
127	10.166.68.252/31	10.166.68.252 – 10.166.68.253	10.166.68.253
128	10.166.68.254/31	10.166.68.254 – 10.166.68.255	10.166.68.255
129	10.166.69.0/31	10.166.69.0 – 10.166.69.1	10.166.69.1
130	10.166.69.2/31	10.166.69.2 – 10.166.69.3	10.166.69.3
131	10.166.69.4/31	10.166.69.4 – 10.166.69.5	10.166.69.5
132	10.166.69.6/31	10.166.69.6 – 10.166.69.7	10.166.69.7
133	10.166.69.8/31	10.166.69.8 – 10.166.69.9	10.166.69.9
134	10.166.69.10/31	10.166.69.10 – 10.166.69.11	10.166.69.11
135	10.166.69.12/31	10.166.69.12 – 10.166.69.13	10.166.69.13
136	10.166.69.14/31	10.166.69.14 – 10.166.69.15	10.166.69.15
137	10.166.69.16/31	10.166.69.16 – 10.166.69.17	10.166.69.17
138	10.166.69.18/31	10.166.69.18 – 10.166.69.19	10.166.69.19
139	10.166.69.20/31	10.166.69.20 – 10.166.69.21	10.166.69.21
140	10.166.69.22/31	10.166.69.22 – 10.166.69.23	10.166.69.23
141	10.166.69.24/31	10.166.69.24 – 10.166.69.25	10.166.69.25
142	10.166.69.26/31	10.166.69.26 – 10.166.69.27	10.166.69.27
143	10.166.69.28/31	10.166.69.28 – 10.166.69.29	10.166.69.29
144	10.166.69.30/31	10.166.69.30 – 10.166.69.31	10.166.69.31
145	10.166.69.32/31	10.166.69.32 – 10.166.69.33	10.166.69.33
146	10.166.69.34/31	10.166.69.34 – 10.166.69.35	10.166.69.35
147	10.166.69.36/31	10.166.69.36 – 10.166.69.37	10.166.69.37
148	10.166.69.38/31	10.166.69.38 – 10.166.69.39	10.166.69.39
149	10.166.69.40/31	10.166.69.40 – 10.166.69.41	10.166.69.41
150	10.166.69.42/31	10.166.69.42 – 10.166.69.43	10.166.69.43
151	10.166.69.44/31	10.166.69.44 – 10.166.69.45	10.166.69.45
152	10.166.69.46/31	10.166.69.46 – 10.166.69.47	10.166.69.47
153	10.166.69.48/31	10.166.69.48 – 10.166.69.49	10.166.69.49
154	10.166.69.50/31	10.166.69.50 – 10.166.69.51	10.166.69.51
155	10.166.69.52/31	10.166.69.52 – 10.166.69.53	10.166.69.53
156	10.166.69.54/31	10.166.69.54 – 10.166.69.55	10.166.69.55
157	10.166.69.56/31	10.166.69.56 – 10.166.69.57	10.166.69.57
158	10.166.69.58/31	10.166.69.58 – 10.166.69.59	10.166.69.59
159	10.166.69.60/31	10.166.69.60 – 10.166.69.61	10.166.69.61
160	10.166.69.62/31	10.166.69.62 – 10.166.69.63	10.166.69.63
161	10.166.69.64/31	10.166.69.64 – 10.166.69.65	10.166.69.65
162	10.166.69.66/31	10.166.69.66 – 10.166.69.67	10.166.69.67
163	10.166.69.68/31	10.166.69.68 – 10.166.69.69	10.166.69.69
164	10.166.69.70/31	10.166.69.70 – 10.166.69.71	10.166.69.71
165	10.166.69.72/31	10.166.69.72 – 10.166.69.73	10.166.69.73
166	10.166.69.74/31	10.166.69.74 – 10.166.69.75	10.166.69.75
167	10.166.69.76/31	10.166.69.76 – 10.166.69.77	10.166.69.77
168	10.166.69.78/31	10.166.69.78 – 10.166.69.79	10.166.69.79
169	10.166.69.80/31	10.166.69.80 – 10.166.69.81	10.166.69.81
170	10.166.69.82/31	10.166.69.82 – 10.166.69.83	10.166.69.83
171	10.166.69.84/31	10.166.69.84 – 10.166.69.85	10.166.69.85
172	10.166.69.86/31	10.166.69.86 – 10.166.69.87	10.166.69.87
173	10.166.69.88/31	10.166.69.88 – 10.166.69.89	10.166.69.89
174	10.166.69.90/31	10.166.69.90 – 10.166.69.91	10.166.69.91
175	10.166.69.92/31	10.166.69.92 – 10.166.69.93	10.166.69.93
176	10.166.69.94/31	10.166.69.94 – 10.166.69.95	10.166.69.95
177	10.166.69.96/31	10.166.69.96 – 10.166.69.97	10.166.69.97
178	10.166.69.98/31	10.166.69.98 – 10.166.69.99	10.166.69.99
179	10.166.69.100/31	10.166.69.100 – 10.166.69.101	10.166.69.101
180	10.166.69.102/31	10.166.69.102 – 10.166.69.103	10.166.69.103
181	10.166.69.104/31	10.166.69.104 – 10.166.69.105	10.166.69.105
182	10.166.69.106/31	10.166.69.106 – 10.166.69.107	10.166.69.107
183	10.166.69.108/31	10.166.69.108 – 10.166.69.109	10.166.69.109
184	10.166.69.110/31	10.166.69.110 – 10.166.69.111	10.166.69.111
185	10.166.69.112/31	10.166.69.112 – 10.166.69.113	10.166.69.113
186	10.166.69.114/31	10.166.69.114 – 10.166.69.115	10.166.69.115
187	10.166.69.116/31	10.166.69.116 – 10.166.69.117	10.166.69.117
188	10.166.69.118/31	10.166.69.118 – 10.166.69.119	10.166.69.119
189	10.166.69.120/31	10.166.69.120 – 10.166.69.121	10.166.69.121
190	10.166.69.122/31	10.166.69.122 – 10.166.69.123	10.166.69.123
191	10.166.69.124/31	10.166.69.124 – 10.166.69.125	10.166.69.125
192	10.166.69.126/31	10.166.69.126 – 10.166.69.127	10.166.69.127
193	10.166.69.128/31	10.166.69.128 – 10.166.69.129	10.166.69.129
194	10.166.69.130/31	10.166.69.130 – 10.166.69.131	10.166.69.131
195	10.166.69.132/31	10.166.69.132 – 10.166.69.133	10.166.69.133
196	10.166.69.134/31	10.166.69.134 – 10.166.69.135	10.166.69.135
197	10.166.69.136/31	10.166.69.136 – 10.166.69.137	10.166.69.137
198	10.166.69.138/31	10.166.69.138 – 10.166.69.139	10.166.69.139
199	10.166.69.140/31	10.166.69.140 – 10.166.69.141	10.166.69.141
200	10.166.69.142/31	10.166.69.142 – 10.166.69.143	10.166.69.143
201	10.166.69.144/31	10.166.69.144 – 10.166.69.145	10.166.69.145
202	10.166.69.146/31	10.166.69.146 – 10.166.69.147	10.166.69.147
203	10.166.69.148/31	10.166.69.148 – 10.166.69.149	10.166.69.149
204	10.166.69.150/31	10.166.69.150 – 10.166.69.151	10.166.69.151
205	10.166.69.152/31	10.166.69.152 – 10.166.69.153	10.166.69.153
206	10.166.69.154/31	10.166.69.154 – 10.166.69.155	10.166.69.155
207	10.166.69.156/31	10.166.69.156 – 10.166.69.157	10.166.69.157
208	10.166.69.158/31	10.166.69.158 – 10.166.69.159	10.166.69.159
209	10.166.69.160/31	10.166.69.160 – 10.166.69.161	10.166.69.161
210	10.166.69.162/31	10.166.69.162 – 10.166.69.163	10.166.69.163
211	10.166.69.164/31	10.166.69.164 – 10.166.69.165	10.166.69.165
212	10.166.69.166/31	10.166.69.166 – 10.166.69.167	10.166.69.167
213	10.166.69.168/31	10.166.69.168 – 10.166.69.169	10.166.69.169
214	10.166.69.170/31	10.166.69.170 – 10.166.69.171	10.166.69.171
215	10.166.69.172/31	10.166.69.172 – 10.166.69.173	10.166.69.173
216	10.166.69.174/31	10.166.69.174 – 10.166.69.175	10.166.69.175
217	10.166.69.176/31	10.166.69.176 – 10.166.69.177	10.166.69.177
218	10.166.69.178/31	10.166.69.178 – 10.166.69.179	10.166.69.179
219	10.166.69.180/31	10.166.69.180 – 10.166.69.181	10.166.69.181
220	10.166.69.182/31	10.166.69.182 – 10.166.69.183	10.166.69.183
221	10.166.69.184/31	10.166.69.184 – 10.166.69.185	10.166.69.185
222	10.166.69.186/31	10.166.69.186 – 10.166.69.187	10.166.69.187
223	10.166.69.188/31	10.166.69.188 – 10.166.69.189	10.166.69.189
224	10.166.69.190/31	10.166.69.190 – 10.166.69.191	10.166.69.191
225	10.166.69.192/31	10.166.69.192 – 10.166.69.193	10.166.69.193
226	10.166.69.194/31	10.166.69.194 – 10.166.69.195	10.166.69.195
227	10.166.69.196/31	10.166.69.196 – 10.166.69.197	10.166.69.197
228	10.166.69.198/31	10.166.69.198 – 10.166.69.199	10.166.69.199
229	10.166.69.200/31	10.166.69.200 – 10.166.69.201	10.166.69.201
230	10.166.69.202/31	10.166.69.202 – 10.166.69.203	10.166.69.203
231	10.166.69.204/31	10.166.69.204 – 10.166.69.205	10.166.69.205
232	10.166.69.206/31	10.166.69.206 – 10.166.69.207	10.166.69.207
233	10.166.69.208/31	10.166.69.208 – 10.166.69.209	10.166.69.209
234	10.166.69.210/31	10.166.69.210 – 10.166.69.211	10.166.69.211
235	10.166.69.212/31	10.166.69.212 – 10.166.69.213	10.166.69.213
236	10.166.69.214/31	10.166.69.214 – 10.166.69.215	10.166.69.215
237	10.166.69.216/31	10.166.69.216 – 10.166.69.217	10.166.69.217
238	10.166.69.218/31	10.166.69.218 – 10.166.69.219	10.166.69.219
239	10.166.69.220/31	10.166.69.220 – 10.166.69.221	10.166.69.221
240	10.166.69.222/31	10.166.69.222 – 10.166.69.223	10.166.69.223
241	10.166.69.224/31	10.166.69.224 – 10.166.69.225	10.166.69.225
242	10.166.69.226/31	10.166.69.226 – 10.166.69.227	10.166.69.227
243	10.166.69.228/31	10.166.69.228 – 10.166.69.229	10.166.69.229
244	10.166.69.230/31	10.166.69.230 – 10.166.69.231	10.166.69.231
245	10.166.69.232/31	10.166.69.232 – 10.166.69.233	10.166.69.233
246	10.166.69.234/31	10.166.69.234 – 10.166.69.235	10.166.69.235
247	10.166.69.236/31	10.166.69.236 – 10.166.69.237	10.166.69.237
248	10.166.69.238/31	10.166.69.238 – 10.166.69.239	10.166.69.239
249	10.166.69.240/31	10.166.69.240 – 10.166.69.241	10.166.69.241
250	10.166.69.242/31	10.166.69.242 – 10.166.69.243	10.166.69.243
251	10.166.69.244/31	10.166.69.244 – 10.166.69.245	10.166.69.245
252	10.166.69.246/31	10.166.69.246 – 10.166.69.247	10.166.69.247
253	10.166.69.248/31	10.166.69.248 – 10.166.69.249	10.166.69.249
254	10.166.69.250/31	10.166.69.250 – 10.166.69.251	10.166.69.251
255	10.166.69.252/31	10.166.69.252 – 10.166.69.253	10.166.69.253
256	10.166.69.254/31	10.166.69.254 – 10.166.69.255	10.166.69.255

showing 256 of 512

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →