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)10.71.148.0/22

network10.71.148.0/22

broadcast10.71.151.255

first host10.71.148.1

last host10.71.151.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.148.0/22

address00001010.01000111.10010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.10010100.00000000

broadcast00001010.01000111.10010111.11111111

green = network part, grey = host part

hex0x0a479400

decimal172463104

reverse dns0.148.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:9400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.148.0/30	10.71.148.1 – 10.71.148.2	10.71.148.3
2	10.71.148.4/30	10.71.148.5 – 10.71.148.6	10.71.148.7
3	10.71.148.8/30	10.71.148.9 – 10.71.148.10	10.71.148.11
4	10.71.148.12/30	10.71.148.13 – 10.71.148.14	10.71.148.15
5	10.71.148.16/30	10.71.148.17 – 10.71.148.18	10.71.148.19
6	10.71.148.20/30	10.71.148.21 – 10.71.148.22	10.71.148.23
7	10.71.148.24/30	10.71.148.25 – 10.71.148.26	10.71.148.27
8	10.71.148.28/30	10.71.148.29 – 10.71.148.30	10.71.148.31
9	10.71.148.32/30	10.71.148.33 – 10.71.148.34	10.71.148.35
10	10.71.148.36/30	10.71.148.37 – 10.71.148.38	10.71.148.39
11	10.71.148.40/30	10.71.148.41 – 10.71.148.42	10.71.148.43
12	10.71.148.44/30	10.71.148.45 – 10.71.148.46	10.71.148.47
13	10.71.148.48/30	10.71.148.49 – 10.71.148.50	10.71.148.51
14	10.71.148.52/30	10.71.148.53 – 10.71.148.54	10.71.148.55
15	10.71.148.56/30	10.71.148.57 – 10.71.148.58	10.71.148.59
16	10.71.148.60/30	10.71.148.61 – 10.71.148.62	10.71.148.63
17	10.71.148.64/30	10.71.148.65 – 10.71.148.66	10.71.148.67
18	10.71.148.68/30	10.71.148.69 – 10.71.148.70	10.71.148.71
19	10.71.148.72/30	10.71.148.73 – 10.71.148.74	10.71.148.75
20	10.71.148.76/30	10.71.148.77 – 10.71.148.78	10.71.148.79
21	10.71.148.80/30	10.71.148.81 – 10.71.148.82	10.71.148.83
22	10.71.148.84/30	10.71.148.85 – 10.71.148.86	10.71.148.87
23	10.71.148.88/30	10.71.148.89 – 10.71.148.90	10.71.148.91
24	10.71.148.92/30	10.71.148.93 – 10.71.148.94	10.71.148.95
25	10.71.148.96/30	10.71.148.97 – 10.71.148.98	10.71.148.99
26	10.71.148.100/30	10.71.148.101 – 10.71.148.102	10.71.148.103
27	10.71.148.104/30	10.71.148.105 – 10.71.148.106	10.71.148.107
28	10.71.148.108/30	10.71.148.109 – 10.71.148.110	10.71.148.111
29	10.71.148.112/30	10.71.148.113 – 10.71.148.114	10.71.148.115
30	10.71.148.116/30	10.71.148.117 – 10.71.148.118	10.71.148.119
31	10.71.148.120/30	10.71.148.121 – 10.71.148.122	10.71.148.123
32	10.71.148.124/30	10.71.148.125 – 10.71.148.126	10.71.148.127
33	10.71.148.128/30	10.71.148.129 – 10.71.148.130	10.71.148.131
34	10.71.148.132/30	10.71.148.133 – 10.71.148.134	10.71.148.135
35	10.71.148.136/30	10.71.148.137 – 10.71.148.138	10.71.148.139
36	10.71.148.140/30	10.71.148.141 – 10.71.148.142	10.71.148.143
37	10.71.148.144/30	10.71.148.145 – 10.71.148.146	10.71.148.147
38	10.71.148.148/30	10.71.148.149 – 10.71.148.150	10.71.148.151
39	10.71.148.152/30	10.71.148.153 – 10.71.148.154	10.71.148.155
40	10.71.148.156/30	10.71.148.157 – 10.71.148.158	10.71.148.159
41	10.71.148.160/30	10.71.148.161 – 10.71.148.162	10.71.148.163
42	10.71.148.164/30	10.71.148.165 – 10.71.148.166	10.71.148.167
43	10.71.148.168/30	10.71.148.169 – 10.71.148.170	10.71.148.171
44	10.71.148.172/30	10.71.148.173 – 10.71.148.174	10.71.148.175
45	10.71.148.176/30	10.71.148.177 – 10.71.148.178	10.71.148.179
46	10.71.148.180/30	10.71.148.181 – 10.71.148.182	10.71.148.183
47	10.71.148.184/30	10.71.148.185 – 10.71.148.186	10.71.148.187
48	10.71.148.188/30	10.71.148.189 – 10.71.148.190	10.71.148.191
49	10.71.148.192/30	10.71.148.193 – 10.71.148.194	10.71.148.195
50	10.71.148.196/30	10.71.148.197 – 10.71.148.198	10.71.148.199
51	10.71.148.200/30	10.71.148.201 – 10.71.148.202	10.71.148.203
52	10.71.148.204/30	10.71.148.205 – 10.71.148.206	10.71.148.207
53	10.71.148.208/30	10.71.148.209 – 10.71.148.210	10.71.148.211
54	10.71.148.212/30	10.71.148.213 – 10.71.148.214	10.71.148.215
55	10.71.148.216/30	10.71.148.217 – 10.71.148.218	10.71.148.219
56	10.71.148.220/30	10.71.148.221 – 10.71.148.222	10.71.148.223
57	10.71.148.224/30	10.71.148.225 – 10.71.148.226	10.71.148.227
58	10.71.148.228/30	10.71.148.229 – 10.71.148.230	10.71.148.231
59	10.71.148.232/30	10.71.148.233 – 10.71.148.234	10.71.148.235
60	10.71.148.236/30	10.71.148.237 – 10.71.148.238	10.71.148.239
61	10.71.148.240/30	10.71.148.241 – 10.71.148.242	10.71.148.243
62	10.71.148.244/30	10.71.148.245 – 10.71.148.246	10.71.148.247
63	10.71.148.248/30	10.71.148.249 – 10.71.148.250	10.71.148.251
64	10.71.148.252/30	10.71.148.253 – 10.71.148.254	10.71.148.255
65	10.71.149.0/30	10.71.149.1 – 10.71.149.2	10.71.149.3
66	10.71.149.4/30	10.71.149.5 – 10.71.149.6	10.71.149.7
67	10.71.149.8/30	10.71.149.9 – 10.71.149.10	10.71.149.11
68	10.71.149.12/30	10.71.149.13 – 10.71.149.14	10.71.149.15
69	10.71.149.16/30	10.71.149.17 – 10.71.149.18	10.71.149.19
70	10.71.149.20/30	10.71.149.21 – 10.71.149.22	10.71.149.23
71	10.71.149.24/30	10.71.149.25 – 10.71.149.26	10.71.149.27
72	10.71.149.28/30	10.71.149.29 – 10.71.149.30	10.71.149.31
73	10.71.149.32/30	10.71.149.33 – 10.71.149.34	10.71.149.35
74	10.71.149.36/30	10.71.149.37 – 10.71.149.38	10.71.149.39
75	10.71.149.40/30	10.71.149.41 – 10.71.149.42	10.71.149.43
76	10.71.149.44/30	10.71.149.45 – 10.71.149.46	10.71.149.47
77	10.71.149.48/30	10.71.149.49 – 10.71.149.50	10.71.149.51
78	10.71.149.52/30	10.71.149.53 – 10.71.149.54	10.71.149.55
79	10.71.149.56/30	10.71.149.57 – 10.71.149.58	10.71.149.59
80	10.71.149.60/30	10.71.149.61 – 10.71.149.62	10.71.149.63
81	10.71.149.64/30	10.71.149.65 – 10.71.149.66	10.71.149.67
82	10.71.149.68/30	10.71.149.69 – 10.71.149.70	10.71.149.71
83	10.71.149.72/30	10.71.149.73 – 10.71.149.74	10.71.149.75
84	10.71.149.76/30	10.71.149.77 – 10.71.149.78	10.71.149.79
85	10.71.149.80/30	10.71.149.81 – 10.71.149.82	10.71.149.83
86	10.71.149.84/30	10.71.149.85 – 10.71.149.86	10.71.149.87
87	10.71.149.88/30	10.71.149.89 – 10.71.149.90	10.71.149.91
88	10.71.149.92/30	10.71.149.93 – 10.71.149.94	10.71.149.95
89	10.71.149.96/30	10.71.149.97 – 10.71.149.98	10.71.149.99
90	10.71.149.100/30	10.71.149.101 – 10.71.149.102	10.71.149.103
91	10.71.149.104/30	10.71.149.105 – 10.71.149.106	10.71.149.107
92	10.71.149.108/30	10.71.149.109 – 10.71.149.110	10.71.149.111
93	10.71.149.112/30	10.71.149.113 – 10.71.149.114	10.71.149.115
94	10.71.149.116/30	10.71.149.117 – 10.71.149.118	10.71.149.119
95	10.71.149.120/30	10.71.149.121 – 10.71.149.122	10.71.149.123
96	10.71.149.124/30	10.71.149.125 – 10.71.149.126	10.71.149.127
97	10.71.149.128/30	10.71.149.129 – 10.71.149.130	10.71.149.131
98	10.71.149.132/30	10.71.149.133 – 10.71.149.134	10.71.149.135
99	10.71.149.136/30	10.71.149.137 – 10.71.149.138	10.71.149.139
100	10.71.149.140/30	10.71.149.141 – 10.71.149.142	10.71.149.143
101	10.71.149.144/30	10.71.149.145 – 10.71.149.146	10.71.149.147
102	10.71.149.148/30	10.71.149.149 – 10.71.149.150	10.71.149.151
103	10.71.149.152/30	10.71.149.153 – 10.71.149.154	10.71.149.155
104	10.71.149.156/30	10.71.149.157 – 10.71.149.158	10.71.149.159
105	10.71.149.160/30	10.71.149.161 – 10.71.149.162	10.71.149.163
106	10.71.149.164/30	10.71.149.165 – 10.71.149.166	10.71.149.167
107	10.71.149.168/30	10.71.149.169 – 10.71.149.170	10.71.149.171
108	10.71.149.172/30	10.71.149.173 – 10.71.149.174	10.71.149.175
109	10.71.149.176/30	10.71.149.177 – 10.71.149.178	10.71.149.179
110	10.71.149.180/30	10.71.149.181 – 10.71.149.182	10.71.149.183
111	10.71.149.184/30	10.71.149.185 – 10.71.149.186	10.71.149.187
112	10.71.149.188/30	10.71.149.189 – 10.71.149.190	10.71.149.191
113	10.71.149.192/30	10.71.149.193 – 10.71.149.194	10.71.149.195
114	10.71.149.196/30	10.71.149.197 – 10.71.149.198	10.71.149.199
115	10.71.149.200/30	10.71.149.201 – 10.71.149.202	10.71.149.203
116	10.71.149.204/30	10.71.149.205 – 10.71.149.206	10.71.149.207
117	10.71.149.208/30	10.71.149.209 – 10.71.149.210	10.71.149.211
118	10.71.149.212/30	10.71.149.213 – 10.71.149.214	10.71.149.215
119	10.71.149.216/30	10.71.149.217 – 10.71.149.218	10.71.149.219
120	10.71.149.220/30	10.71.149.221 – 10.71.149.222	10.71.149.223
121	10.71.149.224/30	10.71.149.225 – 10.71.149.226	10.71.149.227
122	10.71.149.228/30	10.71.149.229 – 10.71.149.230	10.71.149.231
123	10.71.149.232/30	10.71.149.233 – 10.71.149.234	10.71.149.235
124	10.71.149.236/30	10.71.149.237 – 10.71.149.238	10.71.149.239
125	10.71.149.240/30	10.71.149.241 – 10.71.149.242	10.71.149.243
126	10.71.149.244/30	10.71.149.245 – 10.71.149.246	10.71.149.247
127	10.71.149.248/30	10.71.149.249 – 10.71.149.250	10.71.149.251
128	10.71.149.252/30	10.71.149.253 – 10.71.149.254	10.71.149.255
129	10.71.150.0/30	10.71.150.1 – 10.71.150.2	10.71.150.3
130	10.71.150.4/30	10.71.150.5 – 10.71.150.6	10.71.150.7
131	10.71.150.8/30	10.71.150.9 – 10.71.150.10	10.71.150.11
132	10.71.150.12/30	10.71.150.13 – 10.71.150.14	10.71.150.15
133	10.71.150.16/30	10.71.150.17 – 10.71.150.18	10.71.150.19
134	10.71.150.20/30	10.71.150.21 – 10.71.150.22	10.71.150.23
135	10.71.150.24/30	10.71.150.25 – 10.71.150.26	10.71.150.27
136	10.71.150.28/30	10.71.150.29 – 10.71.150.30	10.71.150.31
137	10.71.150.32/30	10.71.150.33 – 10.71.150.34	10.71.150.35
138	10.71.150.36/30	10.71.150.37 – 10.71.150.38	10.71.150.39
139	10.71.150.40/30	10.71.150.41 – 10.71.150.42	10.71.150.43
140	10.71.150.44/30	10.71.150.45 – 10.71.150.46	10.71.150.47
141	10.71.150.48/30	10.71.150.49 – 10.71.150.50	10.71.150.51
142	10.71.150.52/30	10.71.150.53 – 10.71.150.54	10.71.150.55
143	10.71.150.56/30	10.71.150.57 – 10.71.150.58	10.71.150.59
144	10.71.150.60/30	10.71.150.61 – 10.71.150.62	10.71.150.63
145	10.71.150.64/30	10.71.150.65 – 10.71.150.66	10.71.150.67
146	10.71.150.68/30	10.71.150.69 – 10.71.150.70	10.71.150.71
147	10.71.150.72/30	10.71.150.73 – 10.71.150.74	10.71.150.75
148	10.71.150.76/30	10.71.150.77 – 10.71.150.78	10.71.150.79
149	10.71.150.80/30	10.71.150.81 – 10.71.150.82	10.71.150.83
150	10.71.150.84/30	10.71.150.85 – 10.71.150.86	10.71.150.87
151	10.71.150.88/30	10.71.150.89 – 10.71.150.90	10.71.150.91
152	10.71.150.92/30	10.71.150.93 – 10.71.150.94	10.71.150.95
153	10.71.150.96/30	10.71.150.97 – 10.71.150.98	10.71.150.99
154	10.71.150.100/30	10.71.150.101 – 10.71.150.102	10.71.150.103
155	10.71.150.104/30	10.71.150.105 – 10.71.150.106	10.71.150.107
156	10.71.150.108/30	10.71.150.109 – 10.71.150.110	10.71.150.111
157	10.71.150.112/30	10.71.150.113 – 10.71.150.114	10.71.150.115
158	10.71.150.116/30	10.71.150.117 – 10.71.150.118	10.71.150.119
159	10.71.150.120/30	10.71.150.121 – 10.71.150.122	10.71.150.123
160	10.71.150.124/30	10.71.150.125 – 10.71.150.126	10.71.150.127
161	10.71.150.128/30	10.71.150.129 – 10.71.150.130	10.71.150.131
162	10.71.150.132/30	10.71.150.133 – 10.71.150.134	10.71.150.135
163	10.71.150.136/30	10.71.150.137 – 10.71.150.138	10.71.150.139
164	10.71.150.140/30	10.71.150.141 – 10.71.150.142	10.71.150.143
165	10.71.150.144/30	10.71.150.145 – 10.71.150.146	10.71.150.147
166	10.71.150.148/30	10.71.150.149 – 10.71.150.150	10.71.150.151
167	10.71.150.152/30	10.71.150.153 – 10.71.150.154	10.71.150.155
168	10.71.150.156/30	10.71.150.157 – 10.71.150.158	10.71.150.159
169	10.71.150.160/30	10.71.150.161 – 10.71.150.162	10.71.150.163
170	10.71.150.164/30	10.71.150.165 – 10.71.150.166	10.71.150.167
171	10.71.150.168/30	10.71.150.169 – 10.71.150.170	10.71.150.171
172	10.71.150.172/30	10.71.150.173 – 10.71.150.174	10.71.150.175
173	10.71.150.176/30	10.71.150.177 – 10.71.150.178	10.71.150.179
174	10.71.150.180/30	10.71.150.181 – 10.71.150.182	10.71.150.183
175	10.71.150.184/30	10.71.150.185 – 10.71.150.186	10.71.150.187
176	10.71.150.188/30	10.71.150.189 – 10.71.150.190	10.71.150.191
177	10.71.150.192/30	10.71.150.193 – 10.71.150.194	10.71.150.195
178	10.71.150.196/30	10.71.150.197 – 10.71.150.198	10.71.150.199
179	10.71.150.200/30	10.71.150.201 – 10.71.150.202	10.71.150.203
180	10.71.150.204/30	10.71.150.205 – 10.71.150.206	10.71.150.207
181	10.71.150.208/30	10.71.150.209 – 10.71.150.210	10.71.150.211
182	10.71.150.212/30	10.71.150.213 – 10.71.150.214	10.71.150.215
183	10.71.150.216/30	10.71.150.217 – 10.71.150.218	10.71.150.219
184	10.71.150.220/30	10.71.150.221 – 10.71.150.222	10.71.150.223
185	10.71.150.224/30	10.71.150.225 – 10.71.150.226	10.71.150.227
186	10.71.150.228/30	10.71.150.229 – 10.71.150.230	10.71.150.231
187	10.71.150.232/30	10.71.150.233 – 10.71.150.234	10.71.150.235
188	10.71.150.236/30	10.71.150.237 – 10.71.150.238	10.71.150.239
189	10.71.150.240/30	10.71.150.241 – 10.71.150.242	10.71.150.243
190	10.71.150.244/30	10.71.150.245 – 10.71.150.246	10.71.150.247
191	10.71.150.248/30	10.71.150.249 – 10.71.150.250	10.71.150.251
192	10.71.150.252/30	10.71.150.253 – 10.71.150.254	10.71.150.255
193	10.71.151.0/30	10.71.151.1 – 10.71.151.2	10.71.151.3
194	10.71.151.4/30	10.71.151.5 – 10.71.151.6	10.71.151.7
195	10.71.151.8/30	10.71.151.9 – 10.71.151.10	10.71.151.11
196	10.71.151.12/30	10.71.151.13 – 10.71.151.14	10.71.151.15
197	10.71.151.16/30	10.71.151.17 – 10.71.151.18	10.71.151.19
198	10.71.151.20/30	10.71.151.21 – 10.71.151.22	10.71.151.23
199	10.71.151.24/30	10.71.151.25 – 10.71.151.26	10.71.151.27
200	10.71.151.28/30	10.71.151.29 – 10.71.151.30	10.71.151.31
201	10.71.151.32/30	10.71.151.33 – 10.71.151.34	10.71.151.35
202	10.71.151.36/30	10.71.151.37 – 10.71.151.38	10.71.151.39
203	10.71.151.40/30	10.71.151.41 – 10.71.151.42	10.71.151.43
204	10.71.151.44/30	10.71.151.45 – 10.71.151.46	10.71.151.47
205	10.71.151.48/30	10.71.151.49 – 10.71.151.50	10.71.151.51
206	10.71.151.52/30	10.71.151.53 – 10.71.151.54	10.71.151.55
207	10.71.151.56/30	10.71.151.57 – 10.71.151.58	10.71.151.59
208	10.71.151.60/30	10.71.151.61 – 10.71.151.62	10.71.151.63
209	10.71.151.64/30	10.71.151.65 – 10.71.151.66	10.71.151.67
210	10.71.151.68/30	10.71.151.69 – 10.71.151.70	10.71.151.71
211	10.71.151.72/30	10.71.151.73 – 10.71.151.74	10.71.151.75
212	10.71.151.76/30	10.71.151.77 – 10.71.151.78	10.71.151.79
213	10.71.151.80/30	10.71.151.81 – 10.71.151.82	10.71.151.83
214	10.71.151.84/30	10.71.151.85 – 10.71.151.86	10.71.151.87
215	10.71.151.88/30	10.71.151.89 – 10.71.151.90	10.71.151.91
216	10.71.151.92/30	10.71.151.93 – 10.71.151.94	10.71.151.95
217	10.71.151.96/30	10.71.151.97 – 10.71.151.98	10.71.151.99
218	10.71.151.100/30	10.71.151.101 – 10.71.151.102	10.71.151.103
219	10.71.151.104/30	10.71.151.105 – 10.71.151.106	10.71.151.107
220	10.71.151.108/30	10.71.151.109 – 10.71.151.110	10.71.151.111
221	10.71.151.112/30	10.71.151.113 – 10.71.151.114	10.71.151.115
222	10.71.151.116/30	10.71.151.117 – 10.71.151.118	10.71.151.119
223	10.71.151.120/30	10.71.151.121 – 10.71.151.122	10.71.151.123
224	10.71.151.124/30	10.71.151.125 – 10.71.151.126	10.71.151.127
225	10.71.151.128/30	10.71.151.129 – 10.71.151.130	10.71.151.131
226	10.71.151.132/30	10.71.151.133 – 10.71.151.134	10.71.151.135
227	10.71.151.136/30	10.71.151.137 – 10.71.151.138	10.71.151.139
228	10.71.151.140/30	10.71.151.141 – 10.71.151.142	10.71.151.143
229	10.71.151.144/30	10.71.151.145 – 10.71.151.146	10.71.151.147
230	10.71.151.148/30	10.71.151.149 – 10.71.151.150	10.71.151.151
231	10.71.151.152/30	10.71.151.153 – 10.71.151.154	10.71.151.155
232	10.71.151.156/30	10.71.151.157 – 10.71.151.158	10.71.151.159
233	10.71.151.160/30	10.71.151.161 – 10.71.151.162	10.71.151.163
234	10.71.151.164/30	10.71.151.165 – 10.71.151.166	10.71.151.167
235	10.71.151.168/30	10.71.151.169 – 10.71.151.170	10.71.151.171
236	10.71.151.172/30	10.71.151.173 – 10.71.151.174	10.71.151.175
237	10.71.151.176/30	10.71.151.177 – 10.71.151.178	10.71.151.179
238	10.71.151.180/30	10.71.151.181 – 10.71.151.182	10.71.151.183
239	10.71.151.184/30	10.71.151.185 – 10.71.151.186	10.71.151.187
240	10.71.151.188/30	10.71.151.189 – 10.71.151.190	10.71.151.191
241	10.71.151.192/30	10.71.151.193 – 10.71.151.194	10.71.151.195
242	10.71.151.196/30	10.71.151.197 – 10.71.151.198	10.71.151.199
243	10.71.151.200/30	10.71.151.201 – 10.71.151.202	10.71.151.203
244	10.71.151.204/30	10.71.151.205 – 10.71.151.206	10.71.151.207
245	10.71.151.208/30	10.71.151.209 – 10.71.151.210	10.71.151.211
246	10.71.151.212/30	10.71.151.213 – 10.71.151.214	10.71.151.215
247	10.71.151.216/30	10.71.151.217 – 10.71.151.218	10.71.151.219
248	10.71.151.220/30	10.71.151.221 – 10.71.151.222	10.71.151.223
249	10.71.151.224/30	10.71.151.225 – 10.71.151.226	10.71.151.227
250	10.71.151.228/30	10.71.151.229 – 10.71.151.230	10.71.151.231
251	10.71.151.232/30	10.71.151.233 – 10.71.151.234	10.71.151.235
252	10.71.151.236/30	10.71.151.237 – 10.71.151.238	10.71.151.239
253	10.71.151.240/30	10.71.151.241 – 10.71.151.242	10.71.151.243
254	10.71.151.244/30	10.71.151.245 – 10.71.151.246	10.71.151.247
255	10.71.151.248/30	10.71.151.249 – 10.71.151.250	10.71.151.251
256	10.71.151.252/30	10.71.151.253 – 10.71.151.254	10.71.151.255

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 →