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)10.167.106.0/23

network10.167.106.0/23

broadcast10.167.107.255

first host10.167.106.1

last host10.167.107.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.106.0/23

address00001010.10100111.01101010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.01101010.00000000

broadcast00001010.10100111.01101011.11111111

green = network part, grey = host part

hex0x0aa76a00

decimal178743808

reverse dns0.106.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6a00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.106.0/31	10.167.106.0 – 10.167.106.1	10.167.106.1
2	10.167.106.2/31	10.167.106.2 – 10.167.106.3	10.167.106.3
3	10.167.106.4/31	10.167.106.4 – 10.167.106.5	10.167.106.5
4	10.167.106.6/31	10.167.106.6 – 10.167.106.7	10.167.106.7
5	10.167.106.8/31	10.167.106.8 – 10.167.106.9	10.167.106.9
6	10.167.106.10/31	10.167.106.10 – 10.167.106.11	10.167.106.11
7	10.167.106.12/31	10.167.106.12 – 10.167.106.13	10.167.106.13
8	10.167.106.14/31	10.167.106.14 – 10.167.106.15	10.167.106.15
9	10.167.106.16/31	10.167.106.16 – 10.167.106.17	10.167.106.17
10	10.167.106.18/31	10.167.106.18 – 10.167.106.19	10.167.106.19
11	10.167.106.20/31	10.167.106.20 – 10.167.106.21	10.167.106.21
12	10.167.106.22/31	10.167.106.22 – 10.167.106.23	10.167.106.23
13	10.167.106.24/31	10.167.106.24 – 10.167.106.25	10.167.106.25
14	10.167.106.26/31	10.167.106.26 – 10.167.106.27	10.167.106.27
15	10.167.106.28/31	10.167.106.28 – 10.167.106.29	10.167.106.29
16	10.167.106.30/31	10.167.106.30 – 10.167.106.31	10.167.106.31
17	10.167.106.32/31	10.167.106.32 – 10.167.106.33	10.167.106.33
18	10.167.106.34/31	10.167.106.34 – 10.167.106.35	10.167.106.35
19	10.167.106.36/31	10.167.106.36 – 10.167.106.37	10.167.106.37
20	10.167.106.38/31	10.167.106.38 – 10.167.106.39	10.167.106.39
21	10.167.106.40/31	10.167.106.40 – 10.167.106.41	10.167.106.41
22	10.167.106.42/31	10.167.106.42 – 10.167.106.43	10.167.106.43
23	10.167.106.44/31	10.167.106.44 – 10.167.106.45	10.167.106.45
24	10.167.106.46/31	10.167.106.46 – 10.167.106.47	10.167.106.47
25	10.167.106.48/31	10.167.106.48 – 10.167.106.49	10.167.106.49
26	10.167.106.50/31	10.167.106.50 – 10.167.106.51	10.167.106.51
27	10.167.106.52/31	10.167.106.52 – 10.167.106.53	10.167.106.53
28	10.167.106.54/31	10.167.106.54 – 10.167.106.55	10.167.106.55
29	10.167.106.56/31	10.167.106.56 – 10.167.106.57	10.167.106.57
30	10.167.106.58/31	10.167.106.58 – 10.167.106.59	10.167.106.59
31	10.167.106.60/31	10.167.106.60 – 10.167.106.61	10.167.106.61
32	10.167.106.62/31	10.167.106.62 – 10.167.106.63	10.167.106.63
33	10.167.106.64/31	10.167.106.64 – 10.167.106.65	10.167.106.65
34	10.167.106.66/31	10.167.106.66 – 10.167.106.67	10.167.106.67
35	10.167.106.68/31	10.167.106.68 – 10.167.106.69	10.167.106.69
36	10.167.106.70/31	10.167.106.70 – 10.167.106.71	10.167.106.71
37	10.167.106.72/31	10.167.106.72 – 10.167.106.73	10.167.106.73
38	10.167.106.74/31	10.167.106.74 – 10.167.106.75	10.167.106.75
39	10.167.106.76/31	10.167.106.76 – 10.167.106.77	10.167.106.77
40	10.167.106.78/31	10.167.106.78 – 10.167.106.79	10.167.106.79
41	10.167.106.80/31	10.167.106.80 – 10.167.106.81	10.167.106.81
42	10.167.106.82/31	10.167.106.82 – 10.167.106.83	10.167.106.83
43	10.167.106.84/31	10.167.106.84 – 10.167.106.85	10.167.106.85
44	10.167.106.86/31	10.167.106.86 – 10.167.106.87	10.167.106.87
45	10.167.106.88/31	10.167.106.88 – 10.167.106.89	10.167.106.89
46	10.167.106.90/31	10.167.106.90 – 10.167.106.91	10.167.106.91
47	10.167.106.92/31	10.167.106.92 – 10.167.106.93	10.167.106.93
48	10.167.106.94/31	10.167.106.94 – 10.167.106.95	10.167.106.95
49	10.167.106.96/31	10.167.106.96 – 10.167.106.97	10.167.106.97
50	10.167.106.98/31	10.167.106.98 – 10.167.106.99	10.167.106.99
51	10.167.106.100/31	10.167.106.100 – 10.167.106.101	10.167.106.101
52	10.167.106.102/31	10.167.106.102 – 10.167.106.103	10.167.106.103
53	10.167.106.104/31	10.167.106.104 – 10.167.106.105	10.167.106.105
54	10.167.106.106/31	10.167.106.106 – 10.167.106.107	10.167.106.107
55	10.167.106.108/31	10.167.106.108 – 10.167.106.109	10.167.106.109
56	10.167.106.110/31	10.167.106.110 – 10.167.106.111	10.167.106.111
57	10.167.106.112/31	10.167.106.112 – 10.167.106.113	10.167.106.113
58	10.167.106.114/31	10.167.106.114 – 10.167.106.115	10.167.106.115
59	10.167.106.116/31	10.167.106.116 – 10.167.106.117	10.167.106.117
60	10.167.106.118/31	10.167.106.118 – 10.167.106.119	10.167.106.119
61	10.167.106.120/31	10.167.106.120 – 10.167.106.121	10.167.106.121
62	10.167.106.122/31	10.167.106.122 – 10.167.106.123	10.167.106.123
63	10.167.106.124/31	10.167.106.124 – 10.167.106.125	10.167.106.125
64	10.167.106.126/31	10.167.106.126 – 10.167.106.127	10.167.106.127
65	10.167.106.128/31	10.167.106.128 – 10.167.106.129	10.167.106.129
66	10.167.106.130/31	10.167.106.130 – 10.167.106.131	10.167.106.131
67	10.167.106.132/31	10.167.106.132 – 10.167.106.133	10.167.106.133
68	10.167.106.134/31	10.167.106.134 – 10.167.106.135	10.167.106.135
69	10.167.106.136/31	10.167.106.136 – 10.167.106.137	10.167.106.137
70	10.167.106.138/31	10.167.106.138 – 10.167.106.139	10.167.106.139
71	10.167.106.140/31	10.167.106.140 – 10.167.106.141	10.167.106.141
72	10.167.106.142/31	10.167.106.142 – 10.167.106.143	10.167.106.143
73	10.167.106.144/31	10.167.106.144 – 10.167.106.145	10.167.106.145
74	10.167.106.146/31	10.167.106.146 – 10.167.106.147	10.167.106.147
75	10.167.106.148/31	10.167.106.148 – 10.167.106.149	10.167.106.149
76	10.167.106.150/31	10.167.106.150 – 10.167.106.151	10.167.106.151
77	10.167.106.152/31	10.167.106.152 – 10.167.106.153	10.167.106.153
78	10.167.106.154/31	10.167.106.154 – 10.167.106.155	10.167.106.155
79	10.167.106.156/31	10.167.106.156 – 10.167.106.157	10.167.106.157
80	10.167.106.158/31	10.167.106.158 – 10.167.106.159	10.167.106.159
81	10.167.106.160/31	10.167.106.160 – 10.167.106.161	10.167.106.161
82	10.167.106.162/31	10.167.106.162 – 10.167.106.163	10.167.106.163
83	10.167.106.164/31	10.167.106.164 – 10.167.106.165	10.167.106.165
84	10.167.106.166/31	10.167.106.166 – 10.167.106.167	10.167.106.167
85	10.167.106.168/31	10.167.106.168 – 10.167.106.169	10.167.106.169
86	10.167.106.170/31	10.167.106.170 – 10.167.106.171	10.167.106.171
87	10.167.106.172/31	10.167.106.172 – 10.167.106.173	10.167.106.173
88	10.167.106.174/31	10.167.106.174 – 10.167.106.175	10.167.106.175
89	10.167.106.176/31	10.167.106.176 – 10.167.106.177	10.167.106.177
90	10.167.106.178/31	10.167.106.178 – 10.167.106.179	10.167.106.179
91	10.167.106.180/31	10.167.106.180 – 10.167.106.181	10.167.106.181
92	10.167.106.182/31	10.167.106.182 – 10.167.106.183	10.167.106.183
93	10.167.106.184/31	10.167.106.184 – 10.167.106.185	10.167.106.185
94	10.167.106.186/31	10.167.106.186 – 10.167.106.187	10.167.106.187
95	10.167.106.188/31	10.167.106.188 – 10.167.106.189	10.167.106.189
96	10.167.106.190/31	10.167.106.190 – 10.167.106.191	10.167.106.191
97	10.167.106.192/31	10.167.106.192 – 10.167.106.193	10.167.106.193
98	10.167.106.194/31	10.167.106.194 – 10.167.106.195	10.167.106.195
99	10.167.106.196/31	10.167.106.196 – 10.167.106.197	10.167.106.197
100	10.167.106.198/31	10.167.106.198 – 10.167.106.199	10.167.106.199
101	10.167.106.200/31	10.167.106.200 – 10.167.106.201	10.167.106.201
102	10.167.106.202/31	10.167.106.202 – 10.167.106.203	10.167.106.203
103	10.167.106.204/31	10.167.106.204 – 10.167.106.205	10.167.106.205
104	10.167.106.206/31	10.167.106.206 – 10.167.106.207	10.167.106.207
105	10.167.106.208/31	10.167.106.208 – 10.167.106.209	10.167.106.209
106	10.167.106.210/31	10.167.106.210 – 10.167.106.211	10.167.106.211
107	10.167.106.212/31	10.167.106.212 – 10.167.106.213	10.167.106.213
108	10.167.106.214/31	10.167.106.214 – 10.167.106.215	10.167.106.215
109	10.167.106.216/31	10.167.106.216 – 10.167.106.217	10.167.106.217
110	10.167.106.218/31	10.167.106.218 – 10.167.106.219	10.167.106.219
111	10.167.106.220/31	10.167.106.220 – 10.167.106.221	10.167.106.221
112	10.167.106.222/31	10.167.106.222 – 10.167.106.223	10.167.106.223
113	10.167.106.224/31	10.167.106.224 – 10.167.106.225	10.167.106.225
114	10.167.106.226/31	10.167.106.226 – 10.167.106.227	10.167.106.227
115	10.167.106.228/31	10.167.106.228 – 10.167.106.229	10.167.106.229
116	10.167.106.230/31	10.167.106.230 – 10.167.106.231	10.167.106.231
117	10.167.106.232/31	10.167.106.232 – 10.167.106.233	10.167.106.233
118	10.167.106.234/31	10.167.106.234 – 10.167.106.235	10.167.106.235
119	10.167.106.236/31	10.167.106.236 – 10.167.106.237	10.167.106.237
120	10.167.106.238/31	10.167.106.238 – 10.167.106.239	10.167.106.239
121	10.167.106.240/31	10.167.106.240 – 10.167.106.241	10.167.106.241
122	10.167.106.242/31	10.167.106.242 – 10.167.106.243	10.167.106.243
123	10.167.106.244/31	10.167.106.244 – 10.167.106.245	10.167.106.245
124	10.167.106.246/31	10.167.106.246 – 10.167.106.247	10.167.106.247
125	10.167.106.248/31	10.167.106.248 – 10.167.106.249	10.167.106.249
126	10.167.106.250/31	10.167.106.250 – 10.167.106.251	10.167.106.251
127	10.167.106.252/31	10.167.106.252 – 10.167.106.253	10.167.106.253
128	10.167.106.254/31	10.167.106.254 – 10.167.106.255	10.167.106.255
129	10.167.107.0/31	10.167.107.0 – 10.167.107.1	10.167.107.1
130	10.167.107.2/31	10.167.107.2 – 10.167.107.3	10.167.107.3
131	10.167.107.4/31	10.167.107.4 – 10.167.107.5	10.167.107.5
132	10.167.107.6/31	10.167.107.6 – 10.167.107.7	10.167.107.7
133	10.167.107.8/31	10.167.107.8 – 10.167.107.9	10.167.107.9
134	10.167.107.10/31	10.167.107.10 – 10.167.107.11	10.167.107.11
135	10.167.107.12/31	10.167.107.12 – 10.167.107.13	10.167.107.13
136	10.167.107.14/31	10.167.107.14 – 10.167.107.15	10.167.107.15
137	10.167.107.16/31	10.167.107.16 – 10.167.107.17	10.167.107.17
138	10.167.107.18/31	10.167.107.18 – 10.167.107.19	10.167.107.19
139	10.167.107.20/31	10.167.107.20 – 10.167.107.21	10.167.107.21
140	10.167.107.22/31	10.167.107.22 – 10.167.107.23	10.167.107.23
141	10.167.107.24/31	10.167.107.24 – 10.167.107.25	10.167.107.25
142	10.167.107.26/31	10.167.107.26 – 10.167.107.27	10.167.107.27
143	10.167.107.28/31	10.167.107.28 – 10.167.107.29	10.167.107.29
144	10.167.107.30/31	10.167.107.30 – 10.167.107.31	10.167.107.31
145	10.167.107.32/31	10.167.107.32 – 10.167.107.33	10.167.107.33
146	10.167.107.34/31	10.167.107.34 – 10.167.107.35	10.167.107.35
147	10.167.107.36/31	10.167.107.36 – 10.167.107.37	10.167.107.37
148	10.167.107.38/31	10.167.107.38 – 10.167.107.39	10.167.107.39
149	10.167.107.40/31	10.167.107.40 – 10.167.107.41	10.167.107.41
150	10.167.107.42/31	10.167.107.42 – 10.167.107.43	10.167.107.43
151	10.167.107.44/31	10.167.107.44 – 10.167.107.45	10.167.107.45
152	10.167.107.46/31	10.167.107.46 – 10.167.107.47	10.167.107.47
153	10.167.107.48/31	10.167.107.48 – 10.167.107.49	10.167.107.49
154	10.167.107.50/31	10.167.107.50 – 10.167.107.51	10.167.107.51
155	10.167.107.52/31	10.167.107.52 – 10.167.107.53	10.167.107.53
156	10.167.107.54/31	10.167.107.54 – 10.167.107.55	10.167.107.55
157	10.167.107.56/31	10.167.107.56 – 10.167.107.57	10.167.107.57
158	10.167.107.58/31	10.167.107.58 – 10.167.107.59	10.167.107.59
159	10.167.107.60/31	10.167.107.60 – 10.167.107.61	10.167.107.61
160	10.167.107.62/31	10.167.107.62 – 10.167.107.63	10.167.107.63
161	10.167.107.64/31	10.167.107.64 – 10.167.107.65	10.167.107.65
162	10.167.107.66/31	10.167.107.66 – 10.167.107.67	10.167.107.67
163	10.167.107.68/31	10.167.107.68 – 10.167.107.69	10.167.107.69
164	10.167.107.70/31	10.167.107.70 – 10.167.107.71	10.167.107.71
165	10.167.107.72/31	10.167.107.72 – 10.167.107.73	10.167.107.73
166	10.167.107.74/31	10.167.107.74 – 10.167.107.75	10.167.107.75
167	10.167.107.76/31	10.167.107.76 – 10.167.107.77	10.167.107.77
168	10.167.107.78/31	10.167.107.78 – 10.167.107.79	10.167.107.79
169	10.167.107.80/31	10.167.107.80 – 10.167.107.81	10.167.107.81
170	10.167.107.82/31	10.167.107.82 – 10.167.107.83	10.167.107.83
171	10.167.107.84/31	10.167.107.84 – 10.167.107.85	10.167.107.85
172	10.167.107.86/31	10.167.107.86 – 10.167.107.87	10.167.107.87
173	10.167.107.88/31	10.167.107.88 – 10.167.107.89	10.167.107.89
174	10.167.107.90/31	10.167.107.90 – 10.167.107.91	10.167.107.91
175	10.167.107.92/31	10.167.107.92 – 10.167.107.93	10.167.107.93
176	10.167.107.94/31	10.167.107.94 – 10.167.107.95	10.167.107.95
177	10.167.107.96/31	10.167.107.96 – 10.167.107.97	10.167.107.97
178	10.167.107.98/31	10.167.107.98 – 10.167.107.99	10.167.107.99
179	10.167.107.100/31	10.167.107.100 – 10.167.107.101	10.167.107.101
180	10.167.107.102/31	10.167.107.102 – 10.167.107.103	10.167.107.103
181	10.167.107.104/31	10.167.107.104 – 10.167.107.105	10.167.107.105
182	10.167.107.106/31	10.167.107.106 – 10.167.107.107	10.167.107.107
183	10.167.107.108/31	10.167.107.108 – 10.167.107.109	10.167.107.109
184	10.167.107.110/31	10.167.107.110 – 10.167.107.111	10.167.107.111
185	10.167.107.112/31	10.167.107.112 – 10.167.107.113	10.167.107.113
186	10.167.107.114/31	10.167.107.114 – 10.167.107.115	10.167.107.115
187	10.167.107.116/31	10.167.107.116 – 10.167.107.117	10.167.107.117
188	10.167.107.118/31	10.167.107.118 – 10.167.107.119	10.167.107.119
189	10.167.107.120/31	10.167.107.120 – 10.167.107.121	10.167.107.121
190	10.167.107.122/31	10.167.107.122 – 10.167.107.123	10.167.107.123
191	10.167.107.124/31	10.167.107.124 – 10.167.107.125	10.167.107.125
192	10.167.107.126/31	10.167.107.126 – 10.167.107.127	10.167.107.127
193	10.167.107.128/31	10.167.107.128 – 10.167.107.129	10.167.107.129
194	10.167.107.130/31	10.167.107.130 – 10.167.107.131	10.167.107.131
195	10.167.107.132/31	10.167.107.132 – 10.167.107.133	10.167.107.133
196	10.167.107.134/31	10.167.107.134 – 10.167.107.135	10.167.107.135
197	10.167.107.136/31	10.167.107.136 – 10.167.107.137	10.167.107.137
198	10.167.107.138/31	10.167.107.138 – 10.167.107.139	10.167.107.139
199	10.167.107.140/31	10.167.107.140 – 10.167.107.141	10.167.107.141
200	10.167.107.142/31	10.167.107.142 – 10.167.107.143	10.167.107.143
201	10.167.107.144/31	10.167.107.144 – 10.167.107.145	10.167.107.145
202	10.167.107.146/31	10.167.107.146 – 10.167.107.147	10.167.107.147
203	10.167.107.148/31	10.167.107.148 – 10.167.107.149	10.167.107.149
204	10.167.107.150/31	10.167.107.150 – 10.167.107.151	10.167.107.151
205	10.167.107.152/31	10.167.107.152 – 10.167.107.153	10.167.107.153
206	10.167.107.154/31	10.167.107.154 – 10.167.107.155	10.167.107.155
207	10.167.107.156/31	10.167.107.156 – 10.167.107.157	10.167.107.157
208	10.167.107.158/31	10.167.107.158 – 10.167.107.159	10.167.107.159
209	10.167.107.160/31	10.167.107.160 – 10.167.107.161	10.167.107.161
210	10.167.107.162/31	10.167.107.162 – 10.167.107.163	10.167.107.163
211	10.167.107.164/31	10.167.107.164 – 10.167.107.165	10.167.107.165
212	10.167.107.166/31	10.167.107.166 – 10.167.107.167	10.167.107.167
213	10.167.107.168/31	10.167.107.168 – 10.167.107.169	10.167.107.169
214	10.167.107.170/31	10.167.107.170 – 10.167.107.171	10.167.107.171
215	10.167.107.172/31	10.167.107.172 – 10.167.107.173	10.167.107.173
216	10.167.107.174/31	10.167.107.174 – 10.167.107.175	10.167.107.175
217	10.167.107.176/31	10.167.107.176 – 10.167.107.177	10.167.107.177
218	10.167.107.178/31	10.167.107.178 – 10.167.107.179	10.167.107.179
219	10.167.107.180/31	10.167.107.180 – 10.167.107.181	10.167.107.181
220	10.167.107.182/31	10.167.107.182 – 10.167.107.183	10.167.107.183
221	10.167.107.184/31	10.167.107.184 – 10.167.107.185	10.167.107.185
222	10.167.107.186/31	10.167.107.186 – 10.167.107.187	10.167.107.187
223	10.167.107.188/31	10.167.107.188 – 10.167.107.189	10.167.107.189
224	10.167.107.190/31	10.167.107.190 – 10.167.107.191	10.167.107.191
225	10.167.107.192/31	10.167.107.192 – 10.167.107.193	10.167.107.193
226	10.167.107.194/31	10.167.107.194 – 10.167.107.195	10.167.107.195
227	10.167.107.196/31	10.167.107.196 – 10.167.107.197	10.167.107.197
228	10.167.107.198/31	10.167.107.198 – 10.167.107.199	10.167.107.199
229	10.167.107.200/31	10.167.107.200 – 10.167.107.201	10.167.107.201
230	10.167.107.202/31	10.167.107.202 – 10.167.107.203	10.167.107.203
231	10.167.107.204/31	10.167.107.204 – 10.167.107.205	10.167.107.205
232	10.167.107.206/31	10.167.107.206 – 10.167.107.207	10.167.107.207
233	10.167.107.208/31	10.167.107.208 – 10.167.107.209	10.167.107.209
234	10.167.107.210/31	10.167.107.210 – 10.167.107.211	10.167.107.211
235	10.167.107.212/31	10.167.107.212 – 10.167.107.213	10.167.107.213
236	10.167.107.214/31	10.167.107.214 – 10.167.107.215	10.167.107.215
237	10.167.107.216/31	10.167.107.216 – 10.167.107.217	10.167.107.217
238	10.167.107.218/31	10.167.107.218 – 10.167.107.219	10.167.107.219
239	10.167.107.220/31	10.167.107.220 – 10.167.107.221	10.167.107.221
240	10.167.107.222/31	10.167.107.222 – 10.167.107.223	10.167.107.223
241	10.167.107.224/31	10.167.107.224 – 10.167.107.225	10.167.107.225
242	10.167.107.226/31	10.167.107.226 – 10.167.107.227	10.167.107.227
243	10.167.107.228/31	10.167.107.228 – 10.167.107.229	10.167.107.229
244	10.167.107.230/31	10.167.107.230 – 10.167.107.231	10.167.107.231
245	10.167.107.232/31	10.167.107.232 – 10.167.107.233	10.167.107.233
246	10.167.107.234/31	10.167.107.234 – 10.167.107.235	10.167.107.235
247	10.167.107.236/31	10.167.107.236 – 10.167.107.237	10.167.107.237
248	10.167.107.238/31	10.167.107.238 – 10.167.107.239	10.167.107.239
249	10.167.107.240/31	10.167.107.240 – 10.167.107.241	10.167.107.241
250	10.167.107.242/31	10.167.107.242 – 10.167.107.243	10.167.107.243
251	10.167.107.244/31	10.167.107.244 – 10.167.107.245	10.167.107.245
252	10.167.107.246/31	10.167.107.246 – 10.167.107.247	10.167.107.247
253	10.167.107.248/31	10.167.107.248 – 10.167.107.249	10.167.107.249
254	10.167.107.250/31	10.167.107.250 – 10.167.107.251	10.167.107.251
255	10.167.107.252/31	10.167.107.252 – 10.167.107.253	10.167.107.253
256	10.167.107.254/31	10.167.107.254 – 10.167.107.255	10.167.107.255

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 →