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)10.71.80.0/22

network10.71.80.0/22

broadcast10.71.83.255

first host10.71.80.1

last host10.71.83.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.80.0/22

address00001010.01000111.01010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.01010000.00000000

broadcast00001010.01000111.01010011.11111111

green = network part, grey = host part

hex0x0a475000

decimal172445696

reverse dns0.80.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:5000

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.80.0/30	10.71.80.1 – 10.71.80.2	10.71.80.3
2	10.71.80.4/30	10.71.80.5 – 10.71.80.6	10.71.80.7
3	10.71.80.8/30	10.71.80.9 – 10.71.80.10	10.71.80.11
4	10.71.80.12/30	10.71.80.13 – 10.71.80.14	10.71.80.15
5	10.71.80.16/30	10.71.80.17 – 10.71.80.18	10.71.80.19
6	10.71.80.20/30	10.71.80.21 – 10.71.80.22	10.71.80.23
7	10.71.80.24/30	10.71.80.25 – 10.71.80.26	10.71.80.27
8	10.71.80.28/30	10.71.80.29 – 10.71.80.30	10.71.80.31
9	10.71.80.32/30	10.71.80.33 – 10.71.80.34	10.71.80.35
10	10.71.80.36/30	10.71.80.37 – 10.71.80.38	10.71.80.39
11	10.71.80.40/30	10.71.80.41 – 10.71.80.42	10.71.80.43
12	10.71.80.44/30	10.71.80.45 – 10.71.80.46	10.71.80.47
13	10.71.80.48/30	10.71.80.49 – 10.71.80.50	10.71.80.51
14	10.71.80.52/30	10.71.80.53 – 10.71.80.54	10.71.80.55
15	10.71.80.56/30	10.71.80.57 – 10.71.80.58	10.71.80.59
16	10.71.80.60/30	10.71.80.61 – 10.71.80.62	10.71.80.63
17	10.71.80.64/30	10.71.80.65 – 10.71.80.66	10.71.80.67
18	10.71.80.68/30	10.71.80.69 – 10.71.80.70	10.71.80.71
19	10.71.80.72/30	10.71.80.73 – 10.71.80.74	10.71.80.75
20	10.71.80.76/30	10.71.80.77 – 10.71.80.78	10.71.80.79
21	10.71.80.80/30	10.71.80.81 – 10.71.80.82	10.71.80.83
22	10.71.80.84/30	10.71.80.85 – 10.71.80.86	10.71.80.87
23	10.71.80.88/30	10.71.80.89 – 10.71.80.90	10.71.80.91
24	10.71.80.92/30	10.71.80.93 – 10.71.80.94	10.71.80.95
25	10.71.80.96/30	10.71.80.97 – 10.71.80.98	10.71.80.99
26	10.71.80.100/30	10.71.80.101 – 10.71.80.102	10.71.80.103
27	10.71.80.104/30	10.71.80.105 – 10.71.80.106	10.71.80.107
28	10.71.80.108/30	10.71.80.109 – 10.71.80.110	10.71.80.111
29	10.71.80.112/30	10.71.80.113 – 10.71.80.114	10.71.80.115
30	10.71.80.116/30	10.71.80.117 – 10.71.80.118	10.71.80.119
31	10.71.80.120/30	10.71.80.121 – 10.71.80.122	10.71.80.123
32	10.71.80.124/30	10.71.80.125 – 10.71.80.126	10.71.80.127
33	10.71.80.128/30	10.71.80.129 – 10.71.80.130	10.71.80.131
34	10.71.80.132/30	10.71.80.133 – 10.71.80.134	10.71.80.135
35	10.71.80.136/30	10.71.80.137 – 10.71.80.138	10.71.80.139
36	10.71.80.140/30	10.71.80.141 – 10.71.80.142	10.71.80.143
37	10.71.80.144/30	10.71.80.145 – 10.71.80.146	10.71.80.147
38	10.71.80.148/30	10.71.80.149 – 10.71.80.150	10.71.80.151
39	10.71.80.152/30	10.71.80.153 – 10.71.80.154	10.71.80.155
40	10.71.80.156/30	10.71.80.157 – 10.71.80.158	10.71.80.159
41	10.71.80.160/30	10.71.80.161 – 10.71.80.162	10.71.80.163
42	10.71.80.164/30	10.71.80.165 – 10.71.80.166	10.71.80.167
43	10.71.80.168/30	10.71.80.169 – 10.71.80.170	10.71.80.171
44	10.71.80.172/30	10.71.80.173 – 10.71.80.174	10.71.80.175
45	10.71.80.176/30	10.71.80.177 – 10.71.80.178	10.71.80.179
46	10.71.80.180/30	10.71.80.181 – 10.71.80.182	10.71.80.183
47	10.71.80.184/30	10.71.80.185 – 10.71.80.186	10.71.80.187
48	10.71.80.188/30	10.71.80.189 – 10.71.80.190	10.71.80.191
49	10.71.80.192/30	10.71.80.193 – 10.71.80.194	10.71.80.195
50	10.71.80.196/30	10.71.80.197 – 10.71.80.198	10.71.80.199
51	10.71.80.200/30	10.71.80.201 – 10.71.80.202	10.71.80.203
52	10.71.80.204/30	10.71.80.205 – 10.71.80.206	10.71.80.207
53	10.71.80.208/30	10.71.80.209 – 10.71.80.210	10.71.80.211
54	10.71.80.212/30	10.71.80.213 – 10.71.80.214	10.71.80.215
55	10.71.80.216/30	10.71.80.217 – 10.71.80.218	10.71.80.219
56	10.71.80.220/30	10.71.80.221 – 10.71.80.222	10.71.80.223
57	10.71.80.224/30	10.71.80.225 – 10.71.80.226	10.71.80.227
58	10.71.80.228/30	10.71.80.229 – 10.71.80.230	10.71.80.231
59	10.71.80.232/30	10.71.80.233 – 10.71.80.234	10.71.80.235
60	10.71.80.236/30	10.71.80.237 – 10.71.80.238	10.71.80.239
61	10.71.80.240/30	10.71.80.241 – 10.71.80.242	10.71.80.243
62	10.71.80.244/30	10.71.80.245 – 10.71.80.246	10.71.80.247
63	10.71.80.248/30	10.71.80.249 – 10.71.80.250	10.71.80.251
64	10.71.80.252/30	10.71.80.253 – 10.71.80.254	10.71.80.255
65	10.71.81.0/30	10.71.81.1 – 10.71.81.2	10.71.81.3
66	10.71.81.4/30	10.71.81.5 – 10.71.81.6	10.71.81.7
67	10.71.81.8/30	10.71.81.9 – 10.71.81.10	10.71.81.11
68	10.71.81.12/30	10.71.81.13 – 10.71.81.14	10.71.81.15
69	10.71.81.16/30	10.71.81.17 – 10.71.81.18	10.71.81.19
70	10.71.81.20/30	10.71.81.21 – 10.71.81.22	10.71.81.23
71	10.71.81.24/30	10.71.81.25 – 10.71.81.26	10.71.81.27
72	10.71.81.28/30	10.71.81.29 – 10.71.81.30	10.71.81.31
73	10.71.81.32/30	10.71.81.33 – 10.71.81.34	10.71.81.35
74	10.71.81.36/30	10.71.81.37 – 10.71.81.38	10.71.81.39
75	10.71.81.40/30	10.71.81.41 – 10.71.81.42	10.71.81.43
76	10.71.81.44/30	10.71.81.45 – 10.71.81.46	10.71.81.47
77	10.71.81.48/30	10.71.81.49 – 10.71.81.50	10.71.81.51
78	10.71.81.52/30	10.71.81.53 – 10.71.81.54	10.71.81.55
79	10.71.81.56/30	10.71.81.57 – 10.71.81.58	10.71.81.59
80	10.71.81.60/30	10.71.81.61 – 10.71.81.62	10.71.81.63
81	10.71.81.64/30	10.71.81.65 – 10.71.81.66	10.71.81.67
82	10.71.81.68/30	10.71.81.69 – 10.71.81.70	10.71.81.71
83	10.71.81.72/30	10.71.81.73 – 10.71.81.74	10.71.81.75
84	10.71.81.76/30	10.71.81.77 – 10.71.81.78	10.71.81.79
85	10.71.81.80/30	10.71.81.81 – 10.71.81.82	10.71.81.83
86	10.71.81.84/30	10.71.81.85 – 10.71.81.86	10.71.81.87
87	10.71.81.88/30	10.71.81.89 – 10.71.81.90	10.71.81.91
88	10.71.81.92/30	10.71.81.93 – 10.71.81.94	10.71.81.95
89	10.71.81.96/30	10.71.81.97 – 10.71.81.98	10.71.81.99
90	10.71.81.100/30	10.71.81.101 – 10.71.81.102	10.71.81.103
91	10.71.81.104/30	10.71.81.105 – 10.71.81.106	10.71.81.107
92	10.71.81.108/30	10.71.81.109 – 10.71.81.110	10.71.81.111
93	10.71.81.112/30	10.71.81.113 – 10.71.81.114	10.71.81.115
94	10.71.81.116/30	10.71.81.117 – 10.71.81.118	10.71.81.119
95	10.71.81.120/30	10.71.81.121 – 10.71.81.122	10.71.81.123
96	10.71.81.124/30	10.71.81.125 – 10.71.81.126	10.71.81.127
97	10.71.81.128/30	10.71.81.129 – 10.71.81.130	10.71.81.131
98	10.71.81.132/30	10.71.81.133 – 10.71.81.134	10.71.81.135
99	10.71.81.136/30	10.71.81.137 – 10.71.81.138	10.71.81.139
100	10.71.81.140/30	10.71.81.141 – 10.71.81.142	10.71.81.143
101	10.71.81.144/30	10.71.81.145 – 10.71.81.146	10.71.81.147
102	10.71.81.148/30	10.71.81.149 – 10.71.81.150	10.71.81.151
103	10.71.81.152/30	10.71.81.153 – 10.71.81.154	10.71.81.155
104	10.71.81.156/30	10.71.81.157 – 10.71.81.158	10.71.81.159
105	10.71.81.160/30	10.71.81.161 – 10.71.81.162	10.71.81.163
106	10.71.81.164/30	10.71.81.165 – 10.71.81.166	10.71.81.167
107	10.71.81.168/30	10.71.81.169 – 10.71.81.170	10.71.81.171
108	10.71.81.172/30	10.71.81.173 – 10.71.81.174	10.71.81.175
109	10.71.81.176/30	10.71.81.177 – 10.71.81.178	10.71.81.179
110	10.71.81.180/30	10.71.81.181 – 10.71.81.182	10.71.81.183
111	10.71.81.184/30	10.71.81.185 – 10.71.81.186	10.71.81.187
112	10.71.81.188/30	10.71.81.189 – 10.71.81.190	10.71.81.191
113	10.71.81.192/30	10.71.81.193 – 10.71.81.194	10.71.81.195
114	10.71.81.196/30	10.71.81.197 – 10.71.81.198	10.71.81.199
115	10.71.81.200/30	10.71.81.201 – 10.71.81.202	10.71.81.203
116	10.71.81.204/30	10.71.81.205 – 10.71.81.206	10.71.81.207
117	10.71.81.208/30	10.71.81.209 – 10.71.81.210	10.71.81.211
118	10.71.81.212/30	10.71.81.213 – 10.71.81.214	10.71.81.215
119	10.71.81.216/30	10.71.81.217 – 10.71.81.218	10.71.81.219
120	10.71.81.220/30	10.71.81.221 – 10.71.81.222	10.71.81.223
121	10.71.81.224/30	10.71.81.225 – 10.71.81.226	10.71.81.227
122	10.71.81.228/30	10.71.81.229 – 10.71.81.230	10.71.81.231
123	10.71.81.232/30	10.71.81.233 – 10.71.81.234	10.71.81.235
124	10.71.81.236/30	10.71.81.237 – 10.71.81.238	10.71.81.239
125	10.71.81.240/30	10.71.81.241 – 10.71.81.242	10.71.81.243
126	10.71.81.244/30	10.71.81.245 – 10.71.81.246	10.71.81.247
127	10.71.81.248/30	10.71.81.249 – 10.71.81.250	10.71.81.251
128	10.71.81.252/30	10.71.81.253 – 10.71.81.254	10.71.81.255
129	10.71.82.0/30	10.71.82.1 – 10.71.82.2	10.71.82.3
130	10.71.82.4/30	10.71.82.5 – 10.71.82.6	10.71.82.7
131	10.71.82.8/30	10.71.82.9 – 10.71.82.10	10.71.82.11
132	10.71.82.12/30	10.71.82.13 – 10.71.82.14	10.71.82.15
133	10.71.82.16/30	10.71.82.17 – 10.71.82.18	10.71.82.19
134	10.71.82.20/30	10.71.82.21 – 10.71.82.22	10.71.82.23
135	10.71.82.24/30	10.71.82.25 – 10.71.82.26	10.71.82.27
136	10.71.82.28/30	10.71.82.29 – 10.71.82.30	10.71.82.31
137	10.71.82.32/30	10.71.82.33 – 10.71.82.34	10.71.82.35
138	10.71.82.36/30	10.71.82.37 – 10.71.82.38	10.71.82.39
139	10.71.82.40/30	10.71.82.41 – 10.71.82.42	10.71.82.43
140	10.71.82.44/30	10.71.82.45 – 10.71.82.46	10.71.82.47
141	10.71.82.48/30	10.71.82.49 – 10.71.82.50	10.71.82.51
142	10.71.82.52/30	10.71.82.53 – 10.71.82.54	10.71.82.55
143	10.71.82.56/30	10.71.82.57 – 10.71.82.58	10.71.82.59
144	10.71.82.60/30	10.71.82.61 – 10.71.82.62	10.71.82.63
145	10.71.82.64/30	10.71.82.65 – 10.71.82.66	10.71.82.67
146	10.71.82.68/30	10.71.82.69 – 10.71.82.70	10.71.82.71
147	10.71.82.72/30	10.71.82.73 – 10.71.82.74	10.71.82.75
148	10.71.82.76/30	10.71.82.77 – 10.71.82.78	10.71.82.79
149	10.71.82.80/30	10.71.82.81 – 10.71.82.82	10.71.82.83
150	10.71.82.84/30	10.71.82.85 – 10.71.82.86	10.71.82.87
151	10.71.82.88/30	10.71.82.89 – 10.71.82.90	10.71.82.91
152	10.71.82.92/30	10.71.82.93 – 10.71.82.94	10.71.82.95
153	10.71.82.96/30	10.71.82.97 – 10.71.82.98	10.71.82.99
154	10.71.82.100/30	10.71.82.101 – 10.71.82.102	10.71.82.103
155	10.71.82.104/30	10.71.82.105 – 10.71.82.106	10.71.82.107
156	10.71.82.108/30	10.71.82.109 – 10.71.82.110	10.71.82.111
157	10.71.82.112/30	10.71.82.113 – 10.71.82.114	10.71.82.115
158	10.71.82.116/30	10.71.82.117 – 10.71.82.118	10.71.82.119
159	10.71.82.120/30	10.71.82.121 – 10.71.82.122	10.71.82.123
160	10.71.82.124/30	10.71.82.125 – 10.71.82.126	10.71.82.127
161	10.71.82.128/30	10.71.82.129 – 10.71.82.130	10.71.82.131
162	10.71.82.132/30	10.71.82.133 – 10.71.82.134	10.71.82.135
163	10.71.82.136/30	10.71.82.137 – 10.71.82.138	10.71.82.139
164	10.71.82.140/30	10.71.82.141 – 10.71.82.142	10.71.82.143
165	10.71.82.144/30	10.71.82.145 – 10.71.82.146	10.71.82.147
166	10.71.82.148/30	10.71.82.149 – 10.71.82.150	10.71.82.151
167	10.71.82.152/30	10.71.82.153 – 10.71.82.154	10.71.82.155
168	10.71.82.156/30	10.71.82.157 – 10.71.82.158	10.71.82.159
169	10.71.82.160/30	10.71.82.161 – 10.71.82.162	10.71.82.163
170	10.71.82.164/30	10.71.82.165 – 10.71.82.166	10.71.82.167
171	10.71.82.168/30	10.71.82.169 – 10.71.82.170	10.71.82.171
172	10.71.82.172/30	10.71.82.173 – 10.71.82.174	10.71.82.175
173	10.71.82.176/30	10.71.82.177 – 10.71.82.178	10.71.82.179
174	10.71.82.180/30	10.71.82.181 – 10.71.82.182	10.71.82.183
175	10.71.82.184/30	10.71.82.185 – 10.71.82.186	10.71.82.187
176	10.71.82.188/30	10.71.82.189 – 10.71.82.190	10.71.82.191
177	10.71.82.192/30	10.71.82.193 – 10.71.82.194	10.71.82.195
178	10.71.82.196/30	10.71.82.197 – 10.71.82.198	10.71.82.199
179	10.71.82.200/30	10.71.82.201 – 10.71.82.202	10.71.82.203
180	10.71.82.204/30	10.71.82.205 – 10.71.82.206	10.71.82.207
181	10.71.82.208/30	10.71.82.209 – 10.71.82.210	10.71.82.211
182	10.71.82.212/30	10.71.82.213 – 10.71.82.214	10.71.82.215
183	10.71.82.216/30	10.71.82.217 – 10.71.82.218	10.71.82.219
184	10.71.82.220/30	10.71.82.221 – 10.71.82.222	10.71.82.223
185	10.71.82.224/30	10.71.82.225 – 10.71.82.226	10.71.82.227
186	10.71.82.228/30	10.71.82.229 – 10.71.82.230	10.71.82.231
187	10.71.82.232/30	10.71.82.233 – 10.71.82.234	10.71.82.235
188	10.71.82.236/30	10.71.82.237 – 10.71.82.238	10.71.82.239
189	10.71.82.240/30	10.71.82.241 – 10.71.82.242	10.71.82.243
190	10.71.82.244/30	10.71.82.245 – 10.71.82.246	10.71.82.247
191	10.71.82.248/30	10.71.82.249 – 10.71.82.250	10.71.82.251
192	10.71.82.252/30	10.71.82.253 – 10.71.82.254	10.71.82.255
193	10.71.83.0/30	10.71.83.1 – 10.71.83.2	10.71.83.3
194	10.71.83.4/30	10.71.83.5 – 10.71.83.6	10.71.83.7
195	10.71.83.8/30	10.71.83.9 – 10.71.83.10	10.71.83.11
196	10.71.83.12/30	10.71.83.13 – 10.71.83.14	10.71.83.15
197	10.71.83.16/30	10.71.83.17 – 10.71.83.18	10.71.83.19
198	10.71.83.20/30	10.71.83.21 – 10.71.83.22	10.71.83.23
199	10.71.83.24/30	10.71.83.25 – 10.71.83.26	10.71.83.27
200	10.71.83.28/30	10.71.83.29 – 10.71.83.30	10.71.83.31
201	10.71.83.32/30	10.71.83.33 – 10.71.83.34	10.71.83.35
202	10.71.83.36/30	10.71.83.37 – 10.71.83.38	10.71.83.39
203	10.71.83.40/30	10.71.83.41 – 10.71.83.42	10.71.83.43
204	10.71.83.44/30	10.71.83.45 – 10.71.83.46	10.71.83.47
205	10.71.83.48/30	10.71.83.49 – 10.71.83.50	10.71.83.51
206	10.71.83.52/30	10.71.83.53 – 10.71.83.54	10.71.83.55
207	10.71.83.56/30	10.71.83.57 – 10.71.83.58	10.71.83.59
208	10.71.83.60/30	10.71.83.61 – 10.71.83.62	10.71.83.63
209	10.71.83.64/30	10.71.83.65 – 10.71.83.66	10.71.83.67
210	10.71.83.68/30	10.71.83.69 – 10.71.83.70	10.71.83.71
211	10.71.83.72/30	10.71.83.73 – 10.71.83.74	10.71.83.75
212	10.71.83.76/30	10.71.83.77 – 10.71.83.78	10.71.83.79
213	10.71.83.80/30	10.71.83.81 – 10.71.83.82	10.71.83.83
214	10.71.83.84/30	10.71.83.85 – 10.71.83.86	10.71.83.87
215	10.71.83.88/30	10.71.83.89 – 10.71.83.90	10.71.83.91
216	10.71.83.92/30	10.71.83.93 – 10.71.83.94	10.71.83.95
217	10.71.83.96/30	10.71.83.97 – 10.71.83.98	10.71.83.99
218	10.71.83.100/30	10.71.83.101 – 10.71.83.102	10.71.83.103
219	10.71.83.104/30	10.71.83.105 – 10.71.83.106	10.71.83.107
220	10.71.83.108/30	10.71.83.109 – 10.71.83.110	10.71.83.111
221	10.71.83.112/30	10.71.83.113 – 10.71.83.114	10.71.83.115
222	10.71.83.116/30	10.71.83.117 – 10.71.83.118	10.71.83.119
223	10.71.83.120/30	10.71.83.121 – 10.71.83.122	10.71.83.123
224	10.71.83.124/30	10.71.83.125 – 10.71.83.126	10.71.83.127
225	10.71.83.128/30	10.71.83.129 – 10.71.83.130	10.71.83.131
226	10.71.83.132/30	10.71.83.133 – 10.71.83.134	10.71.83.135
227	10.71.83.136/30	10.71.83.137 – 10.71.83.138	10.71.83.139
228	10.71.83.140/30	10.71.83.141 – 10.71.83.142	10.71.83.143
229	10.71.83.144/30	10.71.83.145 – 10.71.83.146	10.71.83.147
230	10.71.83.148/30	10.71.83.149 – 10.71.83.150	10.71.83.151
231	10.71.83.152/30	10.71.83.153 – 10.71.83.154	10.71.83.155
232	10.71.83.156/30	10.71.83.157 – 10.71.83.158	10.71.83.159
233	10.71.83.160/30	10.71.83.161 – 10.71.83.162	10.71.83.163
234	10.71.83.164/30	10.71.83.165 – 10.71.83.166	10.71.83.167
235	10.71.83.168/30	10.71.83.169 – 10.71.83.170	10.71.83.171
236	10.71.83.172/30	10.71.83.173 – 10.71.83.174	10.71.83.175
237	10.71.83.176/30	10.71.83.177 – 10.71.83.178	10.71.83.179
238	10.71.83.180/30	10.71.83.181 – 10.71.83.182	10.71.83.183
239	10.71.83.184/30	10.71.83.185 – 10.71.83.186	10.71.83.187
240	10.71.83.188/30	10.71.83.189 – 10.71.83.190	10.71.83.191
241	10.71.83.192/30	10.71.83.193 – 10.71.83.194	10.71.83.195
242	10.71.83.196/30	10.71.83.197 – 10.71.83.198	10.71.83.199
243	10.71.83.200/30	10.71.83.201 – 10.71.83.202	10.71.83.203
244	10.71.83.204/30	10.71.83.205 – 10.71.83.206	10.71.83.207
245	10.71.83.208/30	10.71.83.209 – 10.71.83.210	10.71.83.211
246	10.71.83.212/30	10.71.83.213 – 10.71.83.214	10.71.83.215
247	10.71.83.216/30	10.71.83.217 – 10.71.83.218	10.71.83.219
248	10.71.83.220/30	10.71.83.221 – 10.71.83.222	10.71.83.223
249	10.71.83.224/30	10.71.83.225 – 10.71.83.226	10.71.83.227
250	10.71.83.228/30	10.71.83.229 – 10.71.83.230	10.71.83.231
251	10.71.83.232/30	10.71.83.233 – 10.71.83.234	10.71.83.235
252	10.71.83.236/30	10.71.83.237 – 10.71.83.238	10.71.83.239
253	10.71.83.240/30	10.71.83.241 – 10.71.83.242	10.71.83.243
254	10.71.83.244/30	10.71.83.245 – 10.71.83.246	10.71.83.247
255	10.71.83.248/30	10.71.83.249 – 10.71.83.250	10.71.83.251
256	10.71.83.252/30	10.71.83.253 – 10.71.83.254	10.71.83.255

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 →