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)10.3.132.0/22

network10.3.132.0/22

broadcast10.3.135.255

first host10.3.132.1

last host10.3.135.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.132.0/22

address00001010.00000011.10000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10000100.00000000

broadcast00001010.00000011.10000111.11111111

green = network part, grey = host part

hex0x0a038400

decimal168002560

reverse dns0.132.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:8400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.132.0/30	10.3.132.1 – 10.3.132.2	10.3.132.3
2	10.3.132.4/30	10.3.132.5 – 10.3.132.6	10.3.132.7
3	10.3.132.8/30	10.3.132.9 – 10.3.132.10	10.3.132.11
4	10.3.132.12/30	10.3.132.13 – 10.3.132.14	10.3.132.15
5	10.3.132.16/30	10.3.132.17 – 10.3.132.18	10.3.132.19
6	10.3.132.20/30	10.3.132.21 – 10.3.132.22	10.3.132.23
7	10.3.132.24/30	10.3.132.25 – 10.3.132.26	10.3.132.27
8	10.3.132.28/30	10.3.132.29 – 10.3.132.30	10.3.132.31
9	10.3.132.32/30	10.3.132.33 – 10.3.132.34	10.3.132.35
10	10.3.132.36/30	10.3.132.37 – 10.3.132.38	10.3.132.39
11	10.3.132.40/30	10.3.132.41 – 10.3.132.42	10.3.132.43
12	10.3.132.44/30	10.3.132.45 – 10.3.132.46	10.3.132.47
13	10.3.132.48/30	10.3.132.49 – 10.3.132.50	10.3.132.51
14	10.3.132.52/30	10.3.132.53 – 10.3.132.54	10.3.132.55
15	10.3.132.56/30	10.3.132.57 – 10.3.132.58	10.3.132.59
16	10.3.132.60/30	10.3.132.61 – 10.3.132.62	10.3.132.63
17	10.3.132.64/30	10.3.132.65 – 10.3.132.66	10.3.132.67
18	10.3.132.68/30	10.3.132.69 – 10.3.132.70	10.3.132.71
19	10.3.132.72/30	10.3.132.73 – 10.3.132.74	10.3.132.75
20	10.3.132.76/30	10.3.132.77 – 10.3.132.78	10.3.132.79
21	10.3.132.80/30	10.3.132.81 – 10.3.132.82	10.3.132.83
22	10.3.132.84/30	10.3.132.85 – 10.3.132.86	10.3.132.87
23	10.3.132.88/30	10.3.132.89 – 10.3.132.90	10.3.132.91
24	10.3.132.92/30	10.3.132.93 – 10.3.132.94	10.3.132.95
25	10.3.132.96/30	10.3.132.97 – 10.3.132.98	10.3.132.99
26	10.3.132.100/30	10.3.132.101 – 10.3.132.102	10.3.132.103
27	10.3.132.104/30	10.3.132.105 – 10.3.132.106	10.3.132.107
28	10.3.132.108/30	10.3.132.109 – 10.3.132.110	10.3.132.111
29	10.3.132.112/30	10.3.132.113 – 10.3.132.114	10.3.132.115
30	10.3.132.116/30	10.3.132.117 – 10.3.132.118	10.3.132.119
31	10.3.132.120/30	10.3.132.121 – 10.3.132.122	10.3.132.123
32	10.3.132.124/30	10.3.132.125 – 10.3.132.126	10.3.132.127
33	10.3.132.128/30	10.3.132.129 – 10.3.132.130	10.3.132.131
34	10.3.132.132/30	10.3.132.133 – 10.3.132.134	10.3.132.135
35	10.3.132.136/30	10.3.132.137 – 10.3.132.138	10.3.132.139
36	10.3.132.140/30	10.3.132.141 – 10.3.132.142	10.3.132.143
37	10.3.132.144/30	10.3.132.145 – 10.3.132.146	10.3.132.147
38	10.3.132.148/30	10.3.132.149 – 10.3.132.150	10.3.132.151
39	10.3.132.152/30	10.3.132.153 – 10.3.132.154	10.3.132.155
40	10.3.132.156/30	10.3.132.157 – 10.3.132.158	10.3.132.159
41	10.3.132.160/30	10.3.132.161 – 10.3.132.162	10.3.132.163
42	10.3.132.164/30	10.3.132.165 – 10.3.132.166	10.3.132.167
43	10.3.132.168/30	10.3.132.169 – 10.3.132.170	10.3.132.171
44	10.3.132.172/30	10.3.132.173 – 10.3.132.174	10.3.132.175
45	10.3.132.176/30	10.3.132.177 – 10.3.132.178	10.3.132.179
46	10.3.132.180/30	10.3.132.181 – 10.3.132.182	10.3.132.183
47	10.3.132.184/30	10.3.132.185 – 10.3.132.186	10.3.132.187
48	10.3.132.188/30	10.3.132.189 – 10.3.132.190	10.3.132.191
49	10.3.132.192/30	10.3.132.193 – 10.3.132.194	10.3.132.195
50	10.3.132.196/30	10.3.132.197 – 10.3.132.198	10.3.132.199
51	10.3.132.200/30	10.3.132.201 – 10.3.132.202	10.3.132.203
52	10.3.132.204/30	10.3.132.205 – 10.3.132.206	10.3.132.207
53	10.3.132.208/30	10.3.132.209 – 10.3.132.210	10.3.132.211
54	10.3.132.212/30	10.3.132.213 – 10.3.132.214	10.3.132.215
55	10.3.132.216/30	10.3.132.217 – 10.3.132.218	10.3.132.219
56	10.3.132.220/30	10.3.132.221 – 10.3.132.222	10.3.132.223
57	10.3.132.224/30	10.3.132.225 – 10.3.132.226	10.3.132.227
58	10.3.132.228/30	10.3.132.229 – 10.3.132.230	10.3.132.231
59	10.3.132.232/30	10.3.132.233 – 10.3.132.234	10.3.132.235
60	10.3.132.236/30	10.3.132.237 – 10.3.132.238	10.3.132.239
61	10.3.132.240/30	10.3.132.241 – 10.3.132.242	10.3.132.243
62	10.3.132.244/30	10.3.132.245 – 10.3.132.246	10.3.132.247
63	10.3.132.248/30	10.3.132.249 – 10.3.132.250	10.3.132.251
64	10.3.132.252/30	10.3.132.253 – 10.3.132.254	10.3.132.255
65	10.3.133.0/30	10.3.133.1 – 10.3.133.2	10.3.133.3
66	10.3.133.4/30	10.3.133.5 – 10.3.133.6	10.3.133.7
67	10.3.133.8/30	10.3.133.9 – 10.3.133.10	10.3.133.11
68	10.3.133.12/30	10.3.133.13 – 10.3.133.14	10.3.133.15
69	10.3.133.16/30	10.3.133.17 – 10.3.133.18	10.3.133.19
70	10.3.133.20/30	10.3.133.21 – 10.3.133.22	10.3.133.23
71	10.3.133.24/30	10.3.133.25 – 10.3.133.26	10.3.133.27
72	10.3.133.28/30	10.3.133.29 – 10.3.133.30	10.3.133.31
73	10.3.133.32/30	10.3.133.33 – 10.3.133.34	10.3.133.35
74	10.3.133.36/30	10.3.133.37 – 10.3.133.38	10.3.133.39
75	10.3.133.40/30	10.3.133.41 – 10.3.133.42	10.3.133.43
76	10.3.133.44/30	10.3.133.45 – 10.3.133.46	10.3.133.47
77	10.3.133.48/30	10.3.133.49 – 10.3.133.50	10.3.133.51
78	10.3.133.52/30	10.3.133.53 – 10.3.133.54	10.3.133.55
79	10.3.133.56/30	10.3.133.57 – 10.3.133.58	10.3.133.59
80	10.3.133.60/30	10.3.133.61 – 10.3.133.62	10.3.133.63
81	10.3.133.64/30	10.3.133.65 – 10.3.133.66	10.3.133.67
82	10.3.133.68/30	10.3.133.69 – 10.3.133.70	10.3.133.71
83	10.3.133.72/30	10.3.133.73 – 10.3.133.74	10.3.133.75
84	10.3.133.76/30	10.3.133.77 – 10.3.133.78	10.3.133.79
85	10.3.133.80/30	10.3.133.81 – 10.3.133.82	10.3.133.83
86	10.3.133.84/30	10.3.133.85 – 10.3.133.86	10.3.133.87
87	10.3.133.88/30	10.3.133.89 – 10.3.133.90	10.3.133.91
88	10.3.133.92/30	10.3.133.93 – 10.3.133.94	10.3.133.95
89	10.3.133.96/30	10.3.133.97 – 10.3.133.98	10.3.133.99
90	10.3.133.100/30	10.3.133.101 – 10.3.133.102	10.3.133.103
91	10.3.133.104/30	10.3.133.105 – 10.3.133.106	10.3.133.107
92	10.3.133.108/30	10.3.133.109 – 10.3.133.110	10.3.133.111
93	10.3.133.112/30	10.3.133.113 – 10.3.133.114	10.3.133.115
94	10.3.133.116/30	10.3.133.117 – 10.3.133.118	10.3.133.119
95	10.3.133.120/30	10.3.133.121 – 10.3.133.122	10.3.133.123
96	10.3.133.124/30	10.3.133.125 – 10.3.133.126	10.3.133.127
97	10.3.133.128/30	10.3.133.129 – 10.3.133.130	10.3.133.131
98	10.3.133.132/30	10.3.133.133 – 10.3.133.134	10.3.133.135
99	10.3.133.136/30	10.3.133.137 – 10.3.133.138	10.3.133.139
100	10.3.133.140/30	10.3.133.141 – 10.3.133.142	10.3.133.143
101	10.3.133.144/30	10.3.133.145 – 10.3.133.146	10.3.133.147
102	10.3.133.148/30	10.3.133.149 – 10.3.133.150	10.3.133.151
103	10.3.133.152/30	10.3.133.153 – 10.3.133.154	10.3.133.155
104	10.3.133.156/30	10.3.133.157 – 10.3.133.158	10.3.133.159
105	10.3.133.160/30	10.3.133.161 – 10.3.133.162	10.3.133.163
106	10.3.133.164/30	10.3.133.165 – 10.3.133.166	10.3.133.167
107	10.3.133.168/30	10.3.133.169 – 10.3.133.170	10.3.133.171
108	10.3.133.172/30	10.3.133.173 – 10.3.133.174	10.3.133.175
109	10.3.133.176/30	10.3.133.177 – 10.3.133.178	10.3.133.179
110	10.3.133.180/30	10.3.133.181 – 10.3.133.182	10.3.133.183
111	10.3.133.184/30	10.3.133.185 – 10.3.133.186	10.3.133.187
112	10.3.133.188/30	10.3.133.189 – 10.3.133.190	10.3.133.191
113	10.3.133.192/30	10.3.133.193 – 10.3.133.194	10.3.133.195
114	10.3.133.196/30	10.3.133.197 – 10.3.133.198	10.3.133.199
115	10.3.133.200/30	10.3.133.201 – 10.3.133.202	10.3.133.203
116	10.3.133.204/30	10.3.133.205 – 10.3.133.206	10.3.133.207
117	10.3.133.208/30	10.3.133.209 – 10.3.133.210	10.3.133.211
118	10.3.133.212/30	10.3.133.213 – 10.3.133.214	10.3.133.215
119	10.3.133.216/30	10.3.133.217 – 10.3.133.218	10.3.133.219
120	10.3.133.220/30	10.3.133.221 – 10.3.133.222	10.3.133.223
121	10.3.133.224/30	10.3.133.225 – 10.3.133.226	10.3.133.227
122	10.3.133.228/30	10.3.133.229 – 10.3.133.230	10.3.133.231
123	10.3.133.232/30	10.3.133.233 – 10.3.133.234	10.3.133.235
124	10.3.133.236/30	10.3.133.237 – 10.3.133.238	10.3.133.239
125	10.3.133.240/30	10.3.133.241 – 10.3.133.242	10.3.133.243
126	10.3.133.244/30	10.3.133.245 – 10.3.133.246	10.3.133.247
127	10.3.133.248/30	10.3.133.249 – 10.3.133.250	10.3.133.251
128	10.3.133.252/30	10.3.133.253 – 10.3.133.254	10.3.133.255
129	10.3.134.0/30	10.3.134.1 – 10.3.134.2	10.3.134.3
130	10.3.134.4/30	10.3.134.5 – 10.3.134.6	10.3.134.7
131	10.3.134.8/30	10.3.134.9 – 10.3.134.10	10.3.134.11
132	10.3.134.12/30	10.3.134.13 – 10.3.134.14	10.3.134.15
133	10.3.134.16/30	10.3.134.17 – 10.3.134.18	10.3.134.19
134	10.3.134.20/30	10.3.134.21 – 10.3.134.22	10.3.134.23
135	10.3.134.24/30	10.3.134.25 – 10.3.134.26	10.3.134.27
136	10.3.134.28/30	10.3.134.29 – 10.3.134.30	10.3.134.31
137	10.3.134.32/30	10.3.134.33 – 10.3.134.34	10.3.134.35
138	10.3.134.36/30	10.3.134.37 – 10.3.134.38	10.3.134.39
139	10.3.134.40/30	10.3.134.41 – 10.3.134.42	10.3.134.43
140	10.3.134.44/30	10.3.134.45 – 10.3.134.46	10.3.134.47
141	10.3.134.48/30	10.3.134.49 – 10.3.134.50	10.3.134.51
142	10.3.134.52/30	10.3.134.53 – 10.3.134.54	10.3.134.55
143	10.3.134.56/30	10.3.134.57 – 10.3.134.58	10.3.134.59
144	10.3.134.60/30	10.3.134.61 – 10.3.134.62	10.3.134.63
145	10.3.134.64/30	10.3.134.65 – 10.3.134.66	10.3.134.67
146	10.3.134.68/30	10.3.134.69 – 10.3.134.70	10.3.134.71
147	10.3.134.72/30	10.3.134.73 – 10.3.134.74	10.3.134.75
148	10.3.134.76/30	10.3.134.77 – 10.3.134.78	10.3.134.79
149	10.3.134.80/30	10.3.134.81 – 10.3.134.82	10.3.134.83
150	10.3.134.84/30	10.3.134.85 – 10.3.134.86	10.3.134.87
151	10.3.134.88/30	10.3.134.89 – 10.3.134.90	10.3.134.91
152	10.3.134.92/30	10.3.134.93 – 10.3.134.94	10.3.134.95
153	10.3.134.96/30	10.3.134.97 – 10.3.134.98	10.3.134.99
154	10.3.134.100/30	10.3.134.101 – 10.3.134.102	10.3.134.103
155	10.3.134.104/30	10.3.134.105 – 10.3.134.106	10.3.134.107
156	10.3.134.108/30	10.3.134.109 – 10.3.134.110	10.3.134.111
157	10.3.134.112/30	10.3.134.113 – 10.3.134.114	10.3.134.115
158	10.3.134.116/30	10.3.134.117 – 10.3.134.118	10.3.134.119
159	10.3.134.120/30	10.3.134.121 – 10.3.134.122	10.3.134.123
160	10.3.134.124/30	10.3.134.125 – 10.3.134.126	10.3.134.127
161	10.3.134.128/30	10.3.134.129 – 10.3.134.130	10.3.134.131
162	10.3.134.132/30	10.3.134.133 – 10.3.134.134	10.3.134.135
163	10.3.134.136/30	10.3.134.137 – 10.3.134.138	10.3.134.139
164	10.3.134.140/30	10.3.134.141 – 10.3.134.142	10.3.134.143
165	10.3.134.144/30	10.3.134.145 – 10.3.134.146	10.3.134.147
166	10.3.134.148/30	10.3.134.149 – 10.3.134.150	10.3.134.151
167	10.3.134.152/30	10.3.134.153 – 10.3.134.154	10.3.134.155
168	10.3.134.156/30	10.3.134.157 – 10.3.134.158	10.3.134.159
169	10.3.134.160/30	10.3.134.161 – 10.3.134.162	10.3.134.163
170	10.3.134.164/30	10.3.134.165 – 10.3.134.166	10.3.134.167
171	10.3.134.168/30	10.3.134.169 – 10.3.134.170	10.3.134.171
172	10.3.134.172/30	10.3.134.173 – 10.3.134.174	10.3.134.175
173	10.3.134.176/30	10.3.134.177 – 10.3.134.178	10.3.134.179
174	10.3.134.180/30	10.3.134.181 – 10.3.134.182	10.3.134.183
175	10.3.134.184/30	10.3.134.185 – 10.3.134.186	10.3.134.187
176	10.3.134.188/30	10.3.134.189 – 10.3.134.190	10.3.134.191
177	10.3.134.192/30	10.3.134.193 – 10.3.134.194	10.3.134.195
178	10.3.134.196/30	10.3.134.197 – 10.3.134.198	10.3.134.199
179	10.3.134.200/30	10.3.134.201 – 10.3.134.202	10.3.134.203
180	10.3.134.204/30	10.3.134.205 – 10.3.134.206	10.3.134.207
181	10.3.134.208/30	10.3.134.209 – 10.3.134.210	10.3.134.211
182	10.3.134.212/30	10.3.134.213 – 10.3.134.214	10.3.134.215
183	10.3.134.216/30	10.3.134.217 – 10.3.134.218	10.3.134.219
184	10.3.134.220/30	10.3.134.221 – 10.3.134.222	10.3.134.223
185	10.3.134.224/30	10.3.134.225 – 10.3.134.226	10.3.134.227
186	10.3.134.228/30	10.3.134.229 – 10.3.134.230	10.3.134.231
187	10.3.134.232/30	10.3.134.233 – 10.3.134.234	10.3.134.235
188	10.3.134.236/30	10.3.134.237 – 10.3.134.238	10.3.134.239
189	10.3.134.240/30	10.3.134.241 – 10.3.134.242	10.3.134.243
190	10.3.134.244/30	10.3.134.245 – 10.3.134.246	10.3.134.247
191	10.3.134.248/30	10.3.134.249 – 10.3.134.250	10.3.134.251
192	10.3.134.252/30	10.3.134.253 – 10.3.134.254	10.3.134.255
193	10.3.135.0/30	10.3.135.1 – 10.3.135.2	10.3.135.3
194	10.3.135.4/30	10.3.135.5 – 10.3.135.6	10.3.135.7
195	10.3.135.8/30	10.3.135.9 – 10.3.135.10	10.3.135.11
196	10.3.135.12/30	10.3.135.13 – 10.3.135.14	10.3.135.15
197	10.3.135.16/30	10.3.135.17 – 10.3.135.18	10.3.135.19
198	10.3.135.20/30	10.3.135.21 – 10.3.135.22	10.3.135.23
199	10.3.135.24/30	10.3.135.25 – 10.3.135.26	10.3.135.27
200	10.3.135.28/30	10.3.135.29 – 10.3.135.30	10.3.135.31
201	10.3.135.32/30	10.3.135.33 – 10.3.135.34	10.3.135.35
202	10.3.135.36/30	10.3.135.37 – 10.3.135.38	10.3.135.39
203	10.3.135.40/30	10.3.135.41 – 10.3.135.42	10.3.135.43
204	10.3.135.44/30	10.3.135.45 – 10.3.135.46	10.3.135.47
205	10.3.135.48/30	10.3.135.49 – 10.3.135.50	10.3.135.51
206	10.3.135.52/30	10.3.135.53 – 10.3.135.54	10.3.135.55
207	10.3.135.56/30	10.3.135.57 – 10.3.135.58	10.3.135.59
208	10.3.135.60/30	10.3.135.61 – 10.3.135.62	10.3.135.63
209	10.3.135.64/30	10.3.135.65 – 10.3.135.66	10.3.135.67
210	10.3.135.68/30	10.3.135.69 – 10.3.135.70	10.3.135.71
211	10.3.135.72/30	10.3.135.73 – 10.3.135.74	10.3.135.75
212	10.3.135.76/30	10.3.135.77 – 10.3.135.78	10.3.135.79
213	10.3.135.80/30	10.3.135.81 – 10.3.135.82	10.3.135.83
214	10.3.135.84/30	10.3.135.85 – 10.3.135.86	10.3.135.87
215	10.3.135.88/30	10.3.135.89 – 10.3.135.90	10.3.135.91
216	10.3.135.92/30	10.3.135.93 – 10.3.135.94	10.3.135.95
217	10.3.135.96/30	10.3.135.97 – 10.3.135.98	10.3.135.99
218	10.3.135.100/30	10.3.135.101 – 10.3.135.102	10.3.135.103
219	10.3.135.104/30	10.3.135.105 – 10.3.135.106	10.3.135.107
220	10.3.135.108/30	10.3.135.109 – 10.3.135.110	10.3.135.111
221	10.3.135.112/30	10.3.135.113 – 10.3.135.114	10.3.135.115
222	10.3.135.116/30	10.3.135.117 – 10.3.135.118	10.3.135.119
223	10.3.135.120/30	10.3.135.121 – 10.3.135.122	10.3.135.123
224	10.3.135.124/30	10.3.135.125 – 10.3.135.126	10.3.135.127
225	10.3.135.128/30	10.3.135.129 – 10.3.135.130	10.3.135.131
226	10.3.135.132/30	10.3.135.133 – 10.3.135.134	10.3.135.135
227	10.3.135.136/30	10.3.135.137 – 10.3.135.138	10.3.135.139
228	10.3.135.140/30	10.3.135.141 – 10.3.135.142	10.3.135.143
229	10.3.135.144/30	10.3.135.145 – 10.3.135.146	10.3.135.147
230	10.3.135.148/30	10.3.135.149 – 10.3.135.150	10.3.135.151
231	10.3.135.152/30	10.3.135.153 – 10.3.135.154	10.3.135.155
232	10.3.135.156/30	10.3.135.157 – 10.3.135.158	10.3.135.159
233	10.3.135.160/30	10.3.135.161 – 10.3.135.162	10.3.135.163
234	10.3.135.164/30	10.3.135.165 – 10.3.135.166	10.3.135.167
235	10.3.135.168/30	10.3.135.169 – 10.3.135.170	10.3.135.171
236	10.3.135.172/30	10.3.135.173 – 10.3.135.174	10.3.135.175
237	10.3.135.176/30	10.3.135.177 – 10.3.135.178	10.3.135.179
238	10.3.135.180/30	10.3.135.181 – 10.3.135.182	10.3.135.183
239	10.3.135.184/30	10.3.135.185 – 10.3.135.186	10.3.135.187
240	10.3.135.188/30	10.3.135.189 – 10.3.135.190	10.3.135.191
241	10.3.135.192/30	10.3.135.193 – 10.3.135.194	10.3.135.195
242	10.3.135.196/30	10.3.135.197 – 10.3.135.198	10.3.135.199
243	10.3.135.200/30	10.3.135.201 – 10.3.135.202	10.3.135.203
244	10.3.135.204/30	10.3.135.205 – 10.3.135.206	10.3.135.207
245	10.3.135.208/30	10.3.135.209 – 10.3.135.210	10.3.135.211
246	10.3.135.212/30	10.3.135.213 – 10.3.135.214	10.3.135.215
247	10.3.135.216/30	10.3.135.217 – 10.3.135.218	10.3.135.219
248	10.3.135.220/30	10.3.135.221 – 10.3.135.222	10.3.135.223
249	10.3.135.224/30	10.3.135.225 – 10.3.135.226	10.3.135.227
250	10.3.135.228/30	10.3.135.229 – 10.3.135.230	10.3.135.231
251	10.3.135.232/30	10.3.135.233 – 10.3.135.234	10.3.135.235
252	10.3.135.236/30	10.3.135.237 – 10.3.135.238	10.3.135.239
253	10.3.135.240/30	10.3.135.241 – 10.3.135.242	10.3.135.243
254	10.3.135.244/30	10.3.135.245 – 10.3.135.246	10.3.135.247
255	10.3.135.248/30	10.3.135.249 – 10.3.135.250	10.3.135.251
256	10.3.135.252/30	10.3.135.253 – 10.3.135.254	10.3.135.255

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 →