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)10.71.48.0/22

network10.71.48.0/22

broadcast10.71.51.255

first host10.71.48.1

last host10.71.51.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.48.0/22

address00001010.01000111.00110000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.00110000.00000000

broadcast00001010.01000111.00110011.11111111

green = network part, grey = host part

hex0x0a473000

decimal172437504

reverse dns0.48.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:3000

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.48.0/30	10.71.48.1 – 10.71.48.2	10.71.48.3
2	10.71.48.4/30	10.71.48.5 – 10.71.48.6	10.71.48.7
3	10.71.48.8/30	10.71.48.9 – 10.71.48.10	10.71.48.11
4	10.71.48.12/30	10.71.48.13 – 10.71.48.14	10.71.48.15
5	10.71.48.16/30	10.71.48.17 – 10.71.48.18	10.71.48.19
6	10.71.48.20/30	10.71.48.21 – 10.71.48.22	10.71.48.23
7	10.71.48.24/30	10.71.48.25 – 10.71.48.26	10.71.48.27
8	10.71.48.28/30	10.71.48.29 – 10.71.48.30	10.71.48.31
9	10.71.48.32/30	10.71.48.33 – 10.71.48.34	10.71.48.35
10	10.71.48.36/30	10.71.48.37 – 10.71.48.38	10.71.48.39
11	10.71.48.40/30	10.71.48.41 – 10.71.48.42	10.71.48.43
12	10.71.48.44/30	10.71.48.45 – 10.71.48.46	10.71.48.47
13	10.71.48.48/30	10.71.48.49 – 10.71.48.50	10.71.48.51
14	10.71.48.52/30	10.71.48.53 – 10.71.48.54	10.71.48.55
15	10.71.48.56/30	10.71.48.57 – 10.71.48.58	10.71.48.59
16	10.71.48.60/30	10.71.48.61 – 10.71.48.62	10.71.48.63
17	10.71.48.64/30	10.71.48.65 – 10.71.48.66	10.71.48.67
18	10.71.48.68/30	10.71.48.69 – 10.71.48.70	10.71.48.71
19	10.71.48.72/30	10.71.48.73 – 10.71.48.74	10.71.48.75
20	10.71.48.76/30	10.71.48.77 – 10.71.48.78	10.71.48.79
21	10.71.48.80/30	10.71.48.81 – 10.71.48.82	10.71.48.83
22	10.71.48.84/30	10.71.48.85 – 10.71.48.86	10.71.48.87
23	10.71.48.88/30	10.71.48.89 – 10.71.48.90	10.71.48.91
24	10.71.48.92/30	10.71.48.93 – 10.71.48.94	10.71.48.95
25	10.71.48.96/30	10.71.48.97 – 10.71.48.98	10.71.48.99
26	10.71.48.100/30	10.71.48.101 – 10.71.48.102	10.71.48.103
27	10.71.48.104/30	10.71.48.105 – 10.71.48.106	10.71.48.107
28	10.71.48.108/30	10.71.48.109 – 10.71.48.110	10.71.48.111
29	10.71.48.112/30	10.71.48.113 – 10.71.48.114	10.71.48.115
30	10.71.48.116/30	10.71.48.117 – 10.71.48.118	10.71.48.119
31	10.71.48.120/30	10.71.48.121 – 10.71.48.122	10.71.48.123
32	10.71.48.124/30	10.71.48.125 – 10.71.48.126	10.71.48.127
33	10.71.48.128/30	10.71.48.129 – 10.71.48.130	10.71.48.131
34	10.71.48.132/30	10.71.48.133 – 10.71.48.134	10.71.48.135
35	10.71.48.136/30	10.71.48.137 – 10.71.48.138	10.71.48.139
36	10.71.48.140/30	10.71.48.141 – 10.71.48.142	10.71.48.143
37	10.71.48.144/30	10.71.48.145 – 10.71.48.146	10.71.48.147
38	10.71.48.148/30	10.71.48.149 – 10.71.48.150	10.71.48.151
39	10.71.48.152/30	10.71.48.153 – 10.71.48.154	10.71.48.155
40	10.71.48.156/30	10.71.48.157 – 10.71.48.158	10.71.48.159
41	10.71.48.160/30	10.71.48.161 – 10.71.48.162	10.71.48.163
42	10.71.48.164/30	10.71.48.165 – 10.71.48.166	10.71.48.167
43	10.71.48.168/30	10.71.48.169 – 10.71.48.170	10.71.48.171
44	10.71.48.172/30	10.71.48.173 – 10.71.48.174	10.71.48.175
45	10.71.48.176/30	10.71.48.177 – 10.71.48.178	10.71.48.179
46	10.71.48.180/30	10.71.48.181 – 10.71.48.182	10.71.48.183
47	10.71.48.184/30	10.71.48.185 – 10.71.48.186	10.71.48.187
48	10.71.48.188/30	10.71.48.189 – 10.71.48.190	10.71.48.191
49	10.71.48.192/30	10.71.48.193 – 10.71.48.194	10.71.48.195
50	10.71.48.196/30	10.71.48.197 – 10.71.48.198	10.71.48.199
51	10.71.48.200/30	10.71.48.201 – 10.71.48.202	10.71.48.203
52	10.71.48.204/30	10.71.48.205 – 10.71.48.206	10.71.48.207
53	10.71.48.208/30	10.71.48.209 – 10.71.48.210	10.71.48.211
54	10.71.48.212/30	10.71.48.213 – 10.71.48.214	10.71.48.215
55	10.71.48.216/30	10.71.48.217 – 10.71.48.218	10.71.48.219
56	10.71.48.220/30	10.71.48.221 – 10.71.48.222	10.71.48.223
57	10.71.48.224/30	10.71.48.225 – 10.71.48.226	10.71.48.227
58	10.71.48.228/30	10.71.48.229 – 10.71.48.230	10.71.48.231
59	10.71.48.232/30	10.71.48.233 – 10.71.48.234	10.71.48.235
60	10.71.48.236/30	10.71.48.237 – 10.71.48.238	10.71.48.239
61	10.71.48.240/30	10.71.48.241 – 10.71.48.242	10.71.48.243
62	10.71.48.244/30	10.71.48.245 – 10.71.48.246	10.71.48.247
63	10.71.48.248/30	10.71.48.249 – 10.71.48.250	10.71.48.251
64	10.71.48.252/30	10.71.48.253 – 10.71.48.254	10.71.48.255
65	10.71.49.0/30	10.71.49.1 – 10.71.49.2	10.71.49.3
66	10.71.49.4/30	10.71.49.5 – 10.71.49.6	10.71.49.7
67	10.71.49.8/30	10.71.49.9 – 10.71.49.10	10.71.49.11
68	10.71.49.12/30	10.71.49.13 – 10.71.49.14	10.71.49.15
69	10.71.49.16/30	10.71.49.17 – 10.71.49.18	10.71.49.19
70	10.71.49.20/30	10.71.49.21 – 10.71.49.22	10.71.49.23
71	10.71.49.24/30	10.71.49.25 – 10.71.49.26	10.71.49.27
72	10.71.49.28/30	10.71.49.29 – 10.71.49.30	10.71.49.31
73	10.71.49.32/30	10.71.49.33 – 10.71.49.34	10.71.49.35
74	10.71.49.36/30	10.71.49.37 – 10.71.49.38	10.71.49.39
75	10.71.49.40/30	10.71.49.41 – 10.71.49.42	10.71.49.43
76	10.71.49.44/30	10.71.49.45 – 10.71.49.46	10.71.49.47
77	10.71.49.48/30	10.71.49.49 – 10.71.49.50	10.71.49.51
78	10.71.49.52/30	10.71.49.53 – 10.71.49.54	10.71.49.55
79	10.71.49.56/30	10.71.49.57 – 10.71.49.58	10.71.49.59
80	10.71.49.60/30	10.71.49.61 – 10.71.49.62	10.71.49.63
81	10.71.49.64/30	10.71.49.65 – 10.71.49.66	10.71.49.67
82	10.71.49.68/30	10.71.49.69 – 10.71.49.70	10.71.49.71
83	10.71.49.72/30	10.71.49.73 – 10.71.49.74	10.71.49.75
84	10.71.49.76/30	10.71.49.77 – 10.71.49.78	10.71.49.79
85	10.71.49.80/30	10.71.49.81 – 10.71.49.82	10.71.49.83
86	10.71.49.84/30	10.71.49.85 – 10.71.49.86	10.71.49.87
87	10.71.49.88/30	10.71.49.89 – 10.71.49.90	10.71.49.91
88	10.71.49.92/30	10.71.49.93 – 10.71.49.94	10.71.49.95
89	10.71.49.96/30	10.71.49.97 – 10.71.49.98	10.71.49.99
90	10.71.49.100/30	10.71.49.101 – 10.71.49.102	10.71.49.103
91	10.71.49.104/30	10.71.49.105 – 10.71.49.106	10.71.49.107
92	10.71.49.108/30	10.71.49.109 – 10.71.49.110	10.71.49.111
93	10.71.49.112/30	10.71.49.113 – 10.71.49.114	10.71.49.115
94	10.71.49.116/30	10.71.49.117 – 10.71.49.118	10.71.49.119
95	10.71.49.120/30	10.71.49.121 – 10.71.49.122	10.71.49.123
96	10.71.49.124/30	10.71.49.125 – 10.71.49.126	10.71.49.127
97	10.71.49.128/30	10.71.49.129 – 10.71.49.130	10.71.49.131
98	10.71.49.132/30	10.71.49.133 – 10.71.49.134	10.71.49.135
99	10.71.49.136/30	10.71.49.137 – 10.71.49.138	10.71.49.139
100	10.71.49.140/30	10.71.49.141 – 10.71.49.142	10.71.49.143
101	10.71.49.144/30	10.71.49.145 – 10.71.49.146	10.71.49.147
102	10.71.49.148/30	10.71.49.149 – 10.71.49.150	10.71.49.151
103	10.71.49.152/30	10.71.49.153 – 10.71.49.154	10.71.49.155
104	10.71.49.156/30	10.71.49.157 – 10.71.49.158	10.71.49.159
105	10.71.49.160/30	10.71.49.161 – 10.71.49.162	10.71.49.163
106	10.71.49.164/30	10.71.49.165 – 10.71.49.166	10.71.49.167
107	10.71.49.168/30	10.71.49.169 – 10.71.49.170	10.71.49.171
108	10.71.49.172/30	10.71.49.173 – 10.71.49.174	10.71.49.175
109	10.71.49.176/30	10.71.49.177 – 10.71.49.178	10.71.49.179
110	10.71.49.180/30	10.71.49.181 – 10.71.49.182	10.71.49.183
111	10.71.49.184/30	10.71.49.185 – 10.71.49.186	10.71.49.187
112	10.71.49.188/30	10.71.49.189 – 10.71.49.190	10.71.49.191
113	10.71.49.192/30	10.71.49.193 – 10.71.49.194	10.71.49.195
114	10.71.49.196/30	10.71.49.197 – 10.71.49.198	10.71.49.199
115	10.71.49.200/30	10.71.49.201 – 10.71.49.202	10.71.49.203
116	10.71.49.204/30	10.71.49.205 – 10.71.49.206	10.71.49.207
117	10.71.49.208/30	10.71.49.209 – 10.71.49.210	10.71.49.211
118	10.71.49.212/30	10.71.49.213 – 10.71.49.214	10.71.49.215
119	10.71.49.216/30	10.71.49.217 – 10.71.49.218	10.71.49.219
120	10.71.49.220/30	10.71.49.221 – 10.71.49.222	10.71.49.223
121	10.71.49.224/30	10.71.49.225 – 10.71.49.226	10.71.49.227
122	10.71.49.228/30	10.71.49.229 – 10.71.49.230	10.71.49.231
123	10.71.49.232/30	10.71.49.233 – 10.71.49.234	10.71.49.235
124	10.71.49.236/30	10.71.49.237 – 10.71.49.238	10.71.49.239
125	10.71.49.240/30	10.71.49.241 – 10.71.49.242	10.71.49.243
126	10.71.49.244/30	10.71.49.245 – 10.71.49.246	10.71.49.247
127	10.71.49.248/30	10.71.49.249 – 10.71.49.250	10.71.49.251
128	10.71.49.252/30	10.71.49.253 – 10.71.49.254	10.71.49.255
129	10.71.50.0/30	10.71.50.1 – 10.71.50.2	10.71.50.3
130	10.71.50.4/30	10.71.50.5 – 10.71.50.6	10.71.50.7
131	10.71.50.8/30	10.71.50.9 – 10.71.50.10	10.71.50.11
132	10.71.50.12/30	10.71.50.13 – 10.71.50.14	10.71.50.15
133	10.71.50.16/30	10.71.50.17 – 10.71.50.18	10.71.50.19
134	10.71.50.20/30	10.71.50.21 – 10.71.50.22	10.71.50.23
135	10.71.50.24/30	10.71.50.25 – 10.71.50.26	10.71.50.27
136	10.71.50.28/30	10.71.50.29 – 10.71.50.30	10.71.50.31
137	10.71.50.32/30	10.71.50.33 – 10.71.50.34	10.71.50.35
138	10.71.50.36/30	10.71.50.37 – 10.71.50.38	10.71.50.39
139	10.71.50.40/30	10.71.50.41 – 10.71.50.42	10.71.50.43
140	10.71.50.44/30	10.71.50.45 – 10.71.50.46	10.71.50.47
141	10.71.50.48/30	10.71.50.49 – 10.71.50.50	10.71.50.51
142	10.71.50.52/30	10.71.50.53 – 10.71.50.54	10.71.50.55
143	10.71.50.56/30	10.71.50.57 – 10.71.50.58	10.71.50.59
144	10.71.50.60/30	10.71.50.61 – 10.71.50.62	10.71.50.63
145	10.71.50.64/30	10.71.50.65 – 10.71.50.66	10.71.50.67
146	10.71.50.68/30	10.71.50.69 – 10.71.50.70	10.71.50.71
147	10.71.50.72/30	10.71.50.73 – 10.71.50.74	10.71.50.75
148	10.71.50.76/30	10.71.50.77 – 10.71.50.78	10.71.50.79
149	10.71.50.80/30	10.71.50.81 – 10.71.50.82	10.71.50.83
150	10.71.50.84/30	10.71.50.85 – 10.71.50.86	10.71.50.87
151	10.71.50.88/30	10.71.50.89 – 10.71.50.90	10.71.50.91
152	10.71.50.92/30	10.71.50.93 – 10.71.50.94	10.71.50.95
153	10.71.50.96/30	10.71.50.97 – 10.71.50.98	10.71.50.99
154	10.71.50.100/30	10.71.50.101 – 10.71.50.102	10.71.50.103
155	10.71.50.104/30	10.71.50.105 – 10.71.50.106	10.71.50.107
156	10.71.50.108/30	10.71.50.109 – 10.71.50.110	10.71.50.111
157	10.71.50.112/30	10.71.50.113 – 10.71.50.114	10.71.50.115
158	10.71.50.116/30	10.71.50.117 – 10.71.50.118	10.71.50.119
159	10.71.50.120/30	10.71.50.121 – 10.71.50.122	10.71.50.123
160	10.71.50.124/30	10.71.50.125 – 10.71.50.126	10.71.50.127
161	10.71.50.128/30	10.71.50.129 – 10.71.50.130	10.71.50.131
162	10.71.50.132/30	10.71.50.133 – 10.71.50.134	10.71.50.135
163	10.71.50.136/30	10.71.50.137 – 10.71.50.138	10.71.50.139
164	10.71.50.140/30	10.71.50.141 – 10.71.50.142	10.71.50.143
165	10.71.50.144/30	10.71.50.145 – 10.71.50.146	10.71.50.147
166	10.71.50.148/30	10.71.50.149 – 10.71.50.150	10.71.50.151
167	10.71.50.152/30	10.71.50.153 – 10.71.50.154	10.71.50.155
168	10.71.50.156/30	10.71.50.157 – 10.71.50.158	10.71.50.159
169	10.71.50.160/30	10.71.50.161 – 10.71.50.162	10.71.50.163
170	10.71.50.164/30	10.71.50.165 – 10.71.50.166	10.71.50.167
171	10.71.50.168/30	10.71.50.169 – 10.71.50.170	10.71.50.171
172	10.71.50.172/30	10.71.50.173 – 10.71.50.174	10.71.50.175
173	10.71.50.176/30	10.71.50.177 – 10.71.50.178	10.71.50.179
174	10.71.50.180/30	10.71.50.181 – 10.71.50.182	10.71.50.183
175	10.71.50.184/30	10.71.50.185 – 10.71.50.186	10.71.50.187
176	10.71.50.188/30	10.71.50.189 – 10.71.50.190	10.71.50.191
177	10.71.50.192/30	10.71.50.193 – 10.71.50.194	10.71.50.195
178	10.71.50.196/30	10.71.50.197 – 10.71.50.198	10.71.50.199
179	10.71.50.200/30	10.71.50.201 – 10.71.50.202	10.71.50.203
180	10.71.50.204/30	10.71.50.205 – 10.71.50.206	10.71.50.207
181	10.71.50.208/30	10.71.50.209 – 10.71.50.210	10.71.50.211
182	10.71.50.212/30	10.71.50.213 – 10.71.50.214	10.71.50.215
183	10.71.50.216/30	10.71.50.217 – 10.71.50.218	10.71.50.219
184	10.71.50.220/30	10.71.50.221 – 10.71.50.222	10.71.50.223
185	10.71.50.224/30	10.71.50.225 – 10.71.50.226	10.71.50.227
186	10.71.50.228/30	10.71.50.229 – 10.71.50.230	10.71.50.231
187	10.71.50.232/30	10.71.50.233 – 10.71.50.234	10.71.50.235
188	10.71.50.236/30	10.71.50.237 – 10.71.50.238	10.71.50.239
189	10.71.50.240/30	10.71.50.241 – 10.71.50.242	10.71.50.243
190	10.71.50.244/30	10.71.50.245 – 10.71.50.246	10.71.50.247
191	10.71.50.248/30	10.71.50.249 – 10.71.50.250	10.71.50.251
192	10.71.50.252/30	10.71.50.253 – 10.71.50.254	10.71.50.255
193	10.71.51.0/30	10.71.51.1 – 10.71.51.2	10.71.51.3
194	10.71.51.4/30	10.71.51.5 – 10.71.51.6	10.71.51.7
195	10.71.51.8/30	10.71.51.9 – 10.71.51.10	10.71.51.11
196	10.71.51.12/30	10.71.51.13 – 10.71.51.14	10.71.51.15
197	10.71.51.16/30	10.71.51.17 – 10.71.51.18	10.71.51.19
198	10.71.51.20/30	10.71.51.21 – 10.71.51.22	10.71.51.23
199	10.71.51.24/30	10.71.51.25 – 10.71.51.26	10.71.51.27
200	10.71.51.28/30	10.71.51.29 – 10.71.51.30	10.71.51.31
201	10.71.51.32/30	10.71.51.33 – 10.71.51.34	10.71.51.35
202	10.71.51.36/30	10.71.51.37 – 10.71.51.38	10.71.51.39
203	10.71.51.40/30	10.71.51.41 – 10.71.51.42	10.71.51.43
204	10.71.51.44/30	10.71.51.45 – 10.71.51.46	10.71.51.47
205	10.71.51.48/30	10.71.51.49 – 10.71.51.50	10.71.51.51
206	10.71.51.52/30	10.71.51.53 – 10.71.51.54	10.71.51.55
207	10.71.51.56/30	10.71.51.57 – 10.71.51.58	10.71.51.59
208	10.71.51.60/30	10.71.51.61 – 10.71.51.62	10.71.51.63
209	10.71.51.64/30	10.71.51.65 – 10.71.51.66	10.71.51.67
210	10.71.51.68/30	10.71.51.69 – 10.71.51.70	10.71.51.71
211	10.71.51.72/30	10.71.51.73 – 10.71.51.74	10.71.51.75
212	10.71.51.76/30	10.71.51.77 – 10.71.51.78	10.71.51.79
213	10.71.51.80/30	10.71.51.81 – 10.71.51.82	10.71.51.83
214	10.71.51.84/30	10.71.51.85 – 10.71.51.86	10.71.51.87
215	10.71.51.88/30	10.71.51.89 – 10.71.51.90	10.71.51.91
216	10.71.51.92/30	10.71.51.93 – 10.71.51.94	10.71.51.95
217	10.71.51.96/30	10.71.51.97 – 10.71.51.98	10.71.51.99
218	10.71.51.100/30	10.71.51.101 – 10.71.51.102	10.71.51.103
219	10.71.51.104/30	10.71.51.105 – 10.71.51.106	10.71.51.107
220	10.71.51.108/30	10.71.51.109 – 10.71.51.110	10.71.51.111
221	10.71.51.112/30	10.71.51.113 – 10.71.51.114	10.71.51.115
222	10.71.51.116/30	10.71.51.117 – 10.71.51.118	10.71.51.119
223	10.71.51.120/30	10.71.51.121 – 10.71.51.122	10.71.51.123
224	10.71.51.124/30	10.71.51.125 – 10.71.51.126	10.71.51.127
225	10.71.51.128/30	10.71.51.129 – 10.71.51.130	10.71.51.131
226	10.71.51.132/30	10.71.51.133 – 10.71.51.134	10.71.51.135
227	10.71.51.136/30	10.71.51.137 – 10.71.51.138	10.71.51.139
228	10.71.51.140/30	10.71.51.141 – 10.71.51.142	10.71.51.143
229	10.71.51.144/30	10.71.51.145 – 10.71.51.146	10.71.51.147
230	10.71.51.148/30	10.71.51.149 – 10.71.51.150	10.71.51.151
231	10.71.51.152/30	10.71.51.153 – 10.71.51.154	10.71.51.155
232	10.71.51.156/30	10.71.51.157 – 10.71.51.158	10.71.51.159
233	10.71.51.160/30	10.71.51.161 – 10.71.51.162	10.71.51.163
234	10.71.51.164/30	10.71.51.165 – 10.71.51.166	10.71.51.167
235	10.71.51.168/30	10.71.51.169 – 10.71.51.170	10.71.51.171
236	10.71.51.172/30	10.71.51.173 – 10.71.51.174	10.71.51.175
237	10.71.51.176/30	10.71.51.177 – 10.71.51.178	10.71.51.179
238	10.71.51.180/30	10.71.51.181 – 10.71.51.182	10.71.51.183
239	10.71.51.184/30	10.71.51.185 – 10.71.51.186	10.71.51.187
240	10.71.51.188/30	10.71.51.189 – 10.71.51.190	10.71.51.191
241	10.71.51.192/30	10.71.51.193 – 10.71.51.194	10.71.51.195
242	10.71.51.196/30	10.71.51.197 – 10.71.51.198	10.71.51.199
243	10.71.51.200/30	10.71.51.201 – 10.71.51.202	10.71.51.203
244	10.71.51.204/30	10.71.51.205 – 10.71.51.206	10.71.51.207
245	10.71.51.208/30	10.71.51.209 – 10.71.51.210	10.71.51.211
246	10.71.51.212/30	10.71.51.213 – 10.71.51.214	10.71.51.215
247	10.71.51.216/30	10.71.51.217 – 10.71.51.218	10.71.51.219
248	10.71.51.220/30	10.71.51.221 – 10.71.51.222	10.71.51.223
249	10.71.51.224/30	10.71.51.225 – 10.71.51.226	10.71.51.227
250	10.71.51.228/30	10.71.51.229 – 10.71.51.230	10.71.51.231
251	10.71.51.232/30	10.71.51.233 – 10.71.51.234	10.71.51.235
252	10.71.51.236/30	10.71.51.237 – 10.71.51.238	10.71.51.239
253	10.71.51.240/30	10.71.51.241 – 10.71.51.242	10.71.51.243
254	10.71.51.244/30	10.71.51.245 – 10.71.51.246	10.71.51.247
255	10.71.51.248/30	10.71.51.249 – 10.71.51.250	10.71.51.251
256	10.71.51.252/30	10.71.51.253 – 10.71.51.254	10.71.51.255

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 →