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)10.71.236.0/22

network10.71.236.0/22

broadcast10.71.239.255

first host10.71.236.1

last host10.71.239.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.236.0/22

address00001010.01000111.11101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.11101100.00000000

broadcast00001010.01000111.11101111.11111111

green = network part, grey = host part

hex0x0a47ec00

decimal172485632

reverse dns0.236.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:ec00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.236.0/30	10.71.236.1 – 10.71.236.2	10.71.236.3
2	10.71.236.4/30	10.71.236.5 – 10.71.236.6	10.71.236.7
3	10.71.236.8/30	10.71.236.9 – 10.71.236.10	10.71.236.11
4	10.71.236.12/30	10.71.236.13 – 10.71.236.14	10.71.236.15
5	10.71.236.16/30	10.71.236.17 – 10.71.236.18	10.71.236.19
6	10.71.236.20/30	10.71.236.21 – 10.71.236.22	10.71.236.23
7	10.71.236.24/30	10.71.236.25 – 10.71.236.26	10.71.236.27
8	10.71.236.28/30	10.71.236.29 – 10.71.236.30	10.71.236.31
9	10.71.236.32/30	10.71.236.33 – 10.71.236.34	10.71.236.35
10	10.71.236.36/30	10.71.236.37 – 10.71.236.38	10.71.236.39
11	10.71.236.40/30	10.71.236.41 – 10.71.236.42	10.71.236.43
12	10.71.236.44/30	10.71.236.45 – 10.71.236.46	10.71.236.47
13	10.71.236.48/30	10.71.236.49 – 10.71.236.50	10.71.236.51
14	10.71.236.52/30	10.71.236.53 – 10.71.236.54	10.71.236.55
15	10.71.236.56/30	10.71.236.57 – 10.71.236.58	10.71.236.59
16	10.71.236.60/30	10.71.236.61 – 10.71.236.62	10.71.236.63
17	10.71.236.64/30	10.71.236.65 – 10.71.236.66	10.71.236.67
18	10.71.236.68/30	10.71.236.69 – 10.71.236.70	10.71.236.71
19	10.71.236.72/30	10.71.236.73 – 10.71.236.74	10.71.236.75
20	10.71.236.76/30	10.71.236.77 – 10.71.236.78	10.71.236.79
21	10.71.236.80/30	10.71.236.81 – 10.71.236.82	10.71.236.83
22	10.71.236.84/30	10.71.236.85 – 10.71.236.86	10.71.236.87
23	10.71.236.88/30	10.71.236.89 – 10.71.236.90	10.71.236.91
24	10.71.236.92/30	10.71.236.93 – 10.71.236.94	10.71.236.95
25	10.71.236.96/30	10.71.236.97 – 10.71.236.98	10.71.236.99
26	10.71.236.100/30	10.71.236.101 – 10.71.236.102	10.71.236.103
27	10.71.236.104/30	10.71.236.105 – 10.71.236.106	10.71.236.107
28	10.71.236.108/30	10.71.236.109 – 10.71.236.110	10.71.236.111
29	10.71.236.112/30	10.71.236.113 – 10.71.236.114	10.71.236.115
30	10.71.236.116/30	10.71.236.117 – 10.71.236.118	10.71.236.119
31	10.71.236.120/30	10.71.236.121 – 10.71.236.122	10.71.236.123
32	10.71.236.124/30	10.71.236.125 – 10.71.236.126	10.71.236.127
33	10.71.236.128/30	10.71.236.129 – 10.71.236.130	10.71.236.131
34	10.71.236.132/30	10.71.236.133 – 10.71.236.134	10.71.236.135
35	10.71.236.136/30	10.71.236.137 – 10.71.236.138	10.71.236.139
36	10.71.236.140/30	10.71.236.141 – 10.71.236.142	10.71.236.143
37	10.71.236.144/30	10.71.236.145 – 10.71.236.146	10.71.236.147
38	10.71.236.148/30	10.71.236.149 – 10.71.236.150	10.71.236.151
39	10.71.236.152/30	10.71.236.153 – 10.71.236.154	10.71.236.155
40	10.71.236.156/30	10.71.236.157 – 10.71.236.158	10.71.236.159
41	10.71.236.160/30	10.71.236.161 – 10.71.236.162	10.71.236.163
42	10.71.236.164/30	10.71.236.165 – 10.71.236.166	10.71.236.167
43	10.71.236.168/30	10.71.236.169 – 10.71.236.170	10.71.236.171
44	10.71.236.172/30	10.71.236.173 – 10.71.236.174	10.71.236.175
45	10.71.236.176/30	10.71.236.177 – 10.71.236.178	10.71.236.179
46	10.71.236.180/30	10.71.236.181 – 10.71.236.182	10.71.236.183
47	10.71.236.184/30	10.71.236.185 – 10.71.236.186	10.71.236.187
48	10.71.236.188/30	10.71.236.189 – 10.71.236.190	10.71.236.191
49	10.71.236.192/30	10.71.236.193 – 10.71.236.194	10.71.236.195
50	10.71.236.196/30	10.71.236.197 – 10.71.236.198	10.71.236.199
51	10.71.236.200/30	10.71.236.201 – 10.71.236.202	10.71.236.203
52	10.71.236.204/30	10.71.236.205 – 10.71.236.206	10.71.236.207
53	10.71.236.208/30	10.71.236.209 – 10.71.236.210	10.71.236.211
54	10.71.236.212/30	10.71.236.213 – 10.71.236.214	10.71.236.215
55	10.71.236.216/30	10.71.236.217 – 10.71.236.218	10.71.236.219
56	10.71.236.220/30	10.71.236.221 – 10.71.236.222	10.71.236.223
57	10.71.236.224/30	10.71.236.225 – 10.71.236.226	10.71.236.227
58	10.71.236.228/30	10.71.236.229 – 10.71.236.230	10.71.236.231
59	10.71.236.232/30	10.71.236.233 – 10.71.236.234	10.71.236.235
60	10.71.236.236/30	10.71.236.237 – 10.71.236.238	10.71.236.239
61	10.71.236.240/30	10.71.236.241 – 10.71.236.242	10.71.236.243
62	10.71.236.244/30	10.71.236.245 – 10.71.236.246	10.71.236.247
63	10.71.236.248/30	10.71.236.249 – 10.71.236.250	10.71.236.251
64	10.71.236.252/30	10.71.236.253 – 10.71.236.254	10.71.236.255
65	10.71.237.0/30	10.71.237.1 – 10.71.237.2	10.71.237.3
66	10.71.237.4/30	10.71.237.5 – 10.71.237.6	10.71.237.7
67	10.71.237.8/30	10.71.237.9 – 10.71.237.10	10.71.237.11
68	10.71.237.12/30	10.71.237.13 – 10.71.237.14	10.71.237.15
69	10.71.237.16/30	10.71.237.17 – 10.71.237.18	10.71.237.19
70	10.71.237.20/30	10.71.237.21 – 10.71.237.22	10.71.237.23
71	10.71.237.24/30	10.71.237.25 – 10.71.237.26	10.71.237.27
72	10.71.237.28/30	10.71.237.29 – 10.71.237.30	10.71.237.31
73	10.71.237.32/30	10.71.237.33 – 10.71.237.34	10.71.237.35
74	10.71.237.36/30	10.71.237.37 – 10.71.237.38	10.71.237.39
75	10.71.237.40/30	10.71.237.41 – 10.71.237.42	10.71.237.43
76	10.71.237.44/30	10.71.237.45 – 10.71.237.46	10.71.237.47
77	10.71.237.48/30	10.71.237.49 – 10.71.237.50	10.71.237.51
78	10.71.237.52/30	10.71.237.53 – 10.71.237.54	10.71.237.55
79	10.71.237.56/30	10.71.237.57 – 10.71.237.58	10.71.237.59
80	10.71.237.60/30	10.71.237.61 – 10.71.237.62	10.71.237.63
81	10.71.237.64/30	10.71.237.65 – 10.71.237.66	10.71.237.67
82	10.71.237.68/30	10.71.237.69 – 10.71.237.70	10.71.237.71
83	10.71.237.72/30	10.71.237.73 – 10.71.237.74	10.71.237.75
84	10.71.237.76/30	10.71.237.77 – 10.71.237.78	10.71.237.79
85	10.71.237.80/30	10.71.237.81 – 10.71.237.82	10.71.237.83
86	10.71.237.84/30	10.71.237.85 – 10.71.237.86	10.71.237.87
87	10.71.237.88/30	10.71.237.89 – 10.71.237.90	10.71.237.91
88	10.71.237.92/30	10.71.237.93 – 10.71.237.94	10.71.237.95
89	10.71.237.96/30	10.71.237.97 – 10.71.237.98	10.71.237.99
90	10.71.237.100/30	10.71.237.101 – 10.71.237.102	10.71.237.103
91	10.71.237.104/30	10.71.237.105 – 10.71.237.106	10.71.237.107
92	10.71.237.108/30	10.71.237.109 – 10.71.237.110	10.71.237.111
93	10.71.237.112/30	10.71.237.113 – 10.71.237.114	10.71.237.115
94	10.71.237.116/30	10.71.237.117 – 10.71.237.118	10.71.237.119
95	10.71.237.120/30	10.71.237.121 – 10.71.237.122	10.71.237.123
96	10.71.237.124/30	10.71.237.125 – 10.71.237.126	10.71.237.127
97	10.71.237.128/30	10.71.237.129 – 10.71.237.130	10.71.237.131
98	10.71.237.132/30	10.71.237.133 – 10.71.237.134	10.71.237.135
99	10.71.237.136/30	10.71.237.137 – 10.71.237.138	10.71.237.139
100	10.71.237.140/30	10.71.237.141 – 10.71.237.142	10.71.237.143
101	10.71.237.144/30	10.71.237.145 – 10.71.237.146	10.71.237.147
102	10.71.237.148/30	10.71.237.149 – 10.71.237.150	10.71.237.151
103	10.71.237.152/30	10.71.237.153 – 10.71.237.154	10.71.237.155
104	10.71.237.156/30	10.71.237.157 – 10.71.237.158	10.71.237.159
105	10.71.237.160/30	10.71.237.161 – 10.71.237.162	10.71.237.163
106	10.71.237.164/30	10.71.237.165 – 10.71.237.166	10.71.237.167
107	10.71.237.168/30	10.71.237.169 – 10.71.237.170	10.71.237.171
108	10.71.237.172/30	10.71.237.173 – 10.71.237.174	10.71.237.175
109	10.71.237.176/30	10.71.237.177 – 10.71.237.178	10.71.237.179
110	10.71.237.180/30	10.71.237.181 – 10.71.237.182	10.71.237.183
111	10.71.237.184/30	10.71.237.185 – 10.71.237.186	10.71.237.187
112	10.71.237.188/30	10.71.237.189 – 10.71.237.190	10.71.237.191
113	10.71.237.192/30	10.71.237.193 – 10.71.237.194	10.71.237.195
114	10.71.237.196/30	10.71.237.197 – 10.71.237.198	10.71.237.199
115	10.71.237.200/30	10.71.237.201 – 10.71.237.202	10.71.237.203
116	10.71.237.204/30	10.71.237.205 – 10.71.237.206	10.71.237.207
117	10.71.237.208/30	10.71.237.209 – 10.71.237.210	10.71.237.211
118	10.71.237.212/30	10.71.237.213 – 10.71.237.214	10.71.237.215
119	10.71.237.216/30	10.71.237.217 – 10.71.237.218	10.71.237.219
120	10.71.237.220/30	10.71.237.221 – 10.71.237.222	10.71.237.223
121	10.71.237.224/30	10.71.237.225 – 10.71.237.226	10.71.237.227
122	10.71.237.228/30	10.71.237.229 – 10.71.237.230	10.71.237.231
123	10.71.237.232/30	10.71.237.233 – 10.71.237.234	10.71.237.235
124	10.71.237.236/30	10.71.237.237 – 10.71.237.238	10.71.237.239
125	10.71.237.240/30	10.71.237.241 – 10.71.237.242	10.71.237.243
126	10.71.237.244/30	10.71.237.245 – 10.71.237.246	10.71.237.247
127	10.71.237.248/30	10.71.237.249 – 10.71.237.250	10.71.237.251
128	10.71.237.252/30	10.71.237.253 – 10.71.237.254	10.71.237.255
129	10.71.238.0/30	10.71.238.1 – 10.71.238.2	10.71.238.3
130	10.71.238.4/30	10.71.238.5 – 10.71.238.6	10.71.238.7
131	10.71.238.8/30	10.71.238.9 – 10.71.238.10	10.71.238.11
132	10.71.238.12/30	10.71.238.13 – 10.71.238.14	10.71.238.15
133	10.71.238.16/30	10.71.238.17 – 10.71.238.18	10.71.238.19
134	10.71.238.20/30	10.71.238.21 – 10.71.238.22	10.71.238.23
135	10.71.238.24/30	10.71.238.25 – 10.71.238.26	10.71.238.27
136	10.71.238.28/30	10.71.238.29 – 10.71.238.30	10.71.238.31
137	10.71.238.32/30	10.71.238.33 – 10.71.238.34	10.71.238.35
138	10.71.238.36/30	10.71.238.37 – 10.71.238.38	10.71.238.39
139	10.71.238.40/30	10.71.238.41 – 10.71.238.42	10.71.238.43
140	10.71.238.44/30	10.71.238.45 – 10.71.238.46	10.71.238.47
141	10.71.238.48/30	10.71.238.49 – 10.71.238.50	10.71.238.51
142	10.71.238.52/30	10.71.238.53 – 10.71.238.54	10.71.238.55
143	10.71.238.56/30	10.71.238.57 – 10.71.238.58	10.71.238.59
144	10.71.238.60/30	10.71.238.61 – 10.71.238.62	10.71.238.63
145	10.71.238.64/30	10.71.238.65 – 10.71.238.66	10.71.238.67
146	10.71.238.68/30	10.71.238.69 – 10.71.238.70	10.71.238.71
147	10.71.238.72/30	10.71.238.73 – 10.71.238.74	10.71.238.75
148	10.71.238.76/30	10.71.238.77 – 10.71.238.78	10.71.238.79
149	10.71.238.80/30	10.71.238.81 – 10.71.238.82	10.71.238.83
150	10.71.238.84/30	10.71.238.85 – 10.71.238.86	10.71.238.87
151	10.71.238.88/30	10.71.238.89 – 10.71.238.90	10.71.238.91
152	10.71.238.92/30	10.71.238.93 – 10.71.238.94	10.71.238.95
153	10.71.238.96/30	10.71.238.97 – 10.71.238.98	10.71.238.99
154	10.71.238.100/30	10.71.238.101 – 10.71.238.102	10.71.238.103
155	10.71.238.104/30	10.71.238.105 – 10.71.238.106	10.71.238.107
156	10.71.238.108/30	10.71.238.109 – 10.71.238.110	10.71.238.111
157	10.71.238.112/30	10.71.238.113 – 10.71.238.114	10.71.238.115
158	10.71.238.116/30	10.71.238.117 – 10.71.238.118	10.71.238.119
159	10.71.238.120/30	10.71.238.121 – 10.71.238.122	10.71.238.123
160	10.71.238.124/30	10.71.238.125 – 10.71.238.126	10.71.238.127
161	10.71.238.128/30	10.71.238.129 – 10.71.238.130	10.71.238.131
162	10.71.238.132/30	10.71.238.133 – 10.71.238.134	10.71.238.135
163	10.71.238.136/30	10.71.238.137 – 10.71.238.138	10.71.238.139
164	10.71.238.140/30	10.71.238.141 – 10.71.238.142	10.71.238.143
165	10.71.238.144/30	10.71.238.145 – 10.71.238.146	10.71.238.147
166	10.71.238.148/30	10.71.238.149 – 10.71.238.150	10.71.238.151
167	10.71.238.152/30	10.71.238.153 – 10.71.238.154	10.71.238.155
168	10.71.238.156/30	10.71.238.157 – 10.71.238.158	10.71.238.159
169	10.71.238.160/30	10.71.238.161 – 10.71.238.162	10.71.238.163
170	10.71.238.164/30	10.71.238.165 – 10.71.238.166	10.71.238.167
171	10.71.238.168/30	10.71.238.169 – 10.71.238.170	10.71.238.171
172	10.71.238.172/30	10.71.238.173 – 10.71.238.174	10.71.238.175
173	10.71.238.176/30	10.71.238.177 – 10.71.238.178	10.71.238.179
174	10.71.238.180/30	10.71.238.181 – 10.71.238.182	10.71.238.183
175	10.71.238.184/30	10.71.238.185 – 10.71.238.186	10.71.238.187
176	10.71.238.188/30	10.71.238.189 – 10.71.238.190	10.71.238.191
177	10.71.238.192/30	10.71.238.193 – 10.71.238.194	10.71.238.195
178	10.71.238.196/30	10.71.238.197 – 10.71.238.198	10.71.238.199
179	10.71.238.200/30	10.71.238.201 – 10.71.238.202	10.71.238.203
180	10.71.238.204/30	10.71.238.205 – 10.71.238.206	10.71.238.207
181	10.71.238.208/30	10.71.238.209 – 10.71.238.210	10.71.238.211
182	10.71.238.212/30	10.71.238.213 – 10.71.238.214	10.71.238.215
183	10.71.238.216/30	10.71.238.217 – 10.71.238.218	10.71.238.219
184	10.71.238.220/30	10.71.238.221 – 10.71.238.222	10.71.238.223
185	10.71.238.224/30	10.71.238.225 – 10.71.238.226	10.71.238.227
186	10.71.238.228/30	10.71.238.229 – 10.71.238.230	10.71.238.231
187	10.71.238.232/30	10.71.238.233 – 10.71.238.234	10.71.238.235
188	10.71.238.236/30	10.71.238.237 – 10.71.238.238	10.71.238.239
189	10.71.238.240/30	10.71.238.241 – 10.71.238.242	10.71.238.243
190	10.71.238.244/30	10.71.238.245 – 10.71.238.246	10.71.238.247
191	10.71.238.248/30	10.71.238.249 – 10.71.238.250	10.71.238.251
192	10.71.238.252/30	10.71.238.253 – 10.71.238.254	10.71.238.255
193	10.71.239.0/30	10.71.239.1 – 10.71.239.2	10.71.239.3
194	10.71.239.4/30	10.71.239.5 – 10.71.239.6	10.71.239.7
195	10.71.239.8/30	10.71.239.9 – 10.71.239.10	10.71.239.11
196	10.71.239.12/30	10.71.239.13 – 10.71.239.14	10.71.239.15
197	10.71.239.16/30	10.71.239.17 – 10.71.239.18	10.71.239.19
198	10.71.239.20/30	10.71.239.21 – 10.71.239.22	10.71.239.23
199	10.71.239.24/30	10.71.239.25 – 10.71.239.26	10.71.239.27
200	10.71.239.28/30	10.71.239.29 – 10.71.239.30	10.71.239.31
201	10.71.239.32/30	10.71.239.33 – 10.71.239.34	10.71.239.35
202	10.71.239.36/30	10.71.239.37 – 10.71.239.38	10.71.239.39
203	10.71.239.40/30	10.71.239.41 – 10.71.239.42	10.71.239.43
204	10.71.239.44/30	10.71.239.45 – 10.71.239.46	10.71.239.47
205	10.71.239.48/30	10.71.239.49 – 10.71.239.50	10.71.239.51
206	10.71.239.52/30	10.71.239.53 – 10.71.239.54	10.71.239.55
207	10.71.239.56/30	10.71.239.57 – 10.71.239.58	10.71.239.59
208	10.71.239.60/30	10.71.239.61 – 10.71.239.62	10.71.239.63
209	10.71.239.64/30	10.71.239.65 – 10.71.239.66	10.71.239.67
210	10.71.239.68/30	10.71.239.69 – 10.71.239.70	10.71.239.71
211	10.71.239.72/30	10.71.239.73 – 10.71.239.74	10.71.239.75
212	10.71.239.76/30	10.71.239.77 – 10.71.239.78	10.71.239.79
213	10.71.239.80/30	10.71.239.81 – 10.71.239.82	10.71.239.83
214	10.71.239.84/30	10.71.239.85 – 10.71.239.86	10.71.239.87
215	10.71.239.88/30	10.71.239.89 – 10.71.239.90	10.71.239.91
216	10.71.239.92/30	10.71.239.93 – 10.71.239.94	10.71.239.95
217	10.71.239.96/30	10.71.239.97 – 10.71.239.98	10.71.239.99
218	10.71.239.100/30	10.71.239.101 – 10.71.239.102	10.71.239.103
219	10.71.239.104/30	10.71.239.105 – 10.71.239.106	10.71.239.107
220	10.71.239.108/30	10.71.239.109 – 10.71.239.110	10.71.239.111
221	10.71.239.112/30	10.71.239.113 – 10.71.239.114	10.71.239.115
222	10.71.239.116/30	10.71.239.117 – 10.71.239.118	10.71.239.119
223	10.71.239.120/30	10.71.239.121 – 10.71.239.122	10.71.239.123
224	10.71.239.124/30	10.71.239.125 – 10.71.239.126	10.71.239.127
225	10.71.239.128/30	10.71.239.129 – 10.71.239.130	10.71.239.131
226	10.71.239.132/30	10.71.239.133 – 10.71.239.134	10.71.239.135
227	10.71.239.136/30	10.71.239.137 – 10.71.239.138	10.71.239.139
228	10.71.239.140/30	10.71.239.141 – 10.71.239.142	10.71.239.143
229	10.71.239.144/30	10.71.239.145 – 10.71.239.146	10.71.239.147
230	10.71.239.148/30	10.71.239.149 – 10.71.239.150	10.71.239.151
231	10.71.239.152/30	10.71.239.153 – 10.71.239.154	10.71.239.155
232	10.71.239.156/30	10.71.239.157 – 10.71.239.158	10.71.239.159
233	10.71.239.160/30	10.71.239.161 – 10.71.239.162	10.71.239.163
234	10.71.239.164/30	10.71.239.165 – 10.71.239.166	10.71.239.167
235	10.71.239.168/30	10.71.239.169 – 10.71.239.170	10.71.239.171
236	10.71.239.172/30	10.71.239.173 – 10.71.239.174	10.71.239.175
237	10.71.239.176/30	10.71.239.177 – 10.71.239.178	10.71.239.179
238	10.71.239.180/30	10.71.239.181 – 10.71.239.182	10.71.239.183
239	10.71.239.184/30	10.71.239.185 – 10.71.239.186	10.71.239.187
240	10.71.239.188/30	10.71.239.189 – 10.71.239.190	10.71.239.191
241	10.71.239.192/30	10.71.239.193 – 10.71.239.194	10.71.239.195
242	10.71.239.196/30	10.71.239.197 – 10.71.239.198	10.71.239.199
243	10.71.239.200/30	10.71.239.201 – 10.71.239.202	10.71.239.203
244	10.71.239.204/30	10.71.239.205 – 10.71.239.206	10.71.239.207
245	10.71.239.208/30	10.71.239.209 – 10.71.239.210	10.71.239.211
246	10.71.239.212/30	10.71.239.213 – 10.71.239.214	10.71.239.215
247	10.71.239.216/30	10.71.239.217 – 10.71.239.218	10.71.239.219
248	10.71.239.220/30	10.71.239.221 – 10.71.239.222	10.71.239.223
249	10.71.239.224/30	10.71.239.225 – 10.71.239.226	10.71.239.227
250	10.71.239.228/30	10.71.239.229 – 10.71.239.230	10.71.239.231
251	10.71.239.232/30	10.71.239.233 – 10.71.239.234	10.71.239.235
252	10.71.239.236/30	10.71.239.237 – 10.71.239.238	10.71.239.239
253	10.71.239.240/30	10.71.239.241 – 10.71.239.242	10.71.239.243
254	10.71.239.244/30	10.71.239.245 – 10.71.239.246	10.71.239.247
255	10.71.239.248/30	10.71.239.249 – 10.71.239.250	10.71.239.251
256	10.71.239.252/30	10.71.239.253 – 10.71.239.254	10.71.239.255

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 /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 →