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)10.2.188.0/22

network10.2.188.0/22

broadcast10.2.191.255

first host10.2.188.1

last host10.2.191.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.188.0/22

address00001010.00000010.10111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10111100.00000000

broadcast00001010.00000010.10111111.11111111

green = network part, grey = host part

hex0x0a02bc00

decimal167951360

reverse dns0.188.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:bc00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.188.0/30	10.2.188.1 – 10.2.188.2	10.2.188.3
2	10.2.188.4/30	10.2.188.5 – 10.2.188.6	10.2.188.7
3	10.2.188.8/30	10.2.188.9 – 10.2.188.10	10.2.188.11
4	10.2.188.12/30	10.2.188.13 – 10.2.188.14	10.2.188.15
5	10.2.188.16/30	10.2.188.17 – 10.2.188.18	10.2.188.19
6	10.2.188.20/30	10.2.188.21 – 10.2.188.22	10.2.188.23
7	10.2.188.24/30	10.2.188.25 – 10.2.188.26	10.2.188.27
8	10.2.188.28/30	10.2.188.29 – 10.2.188.30	10.2.188.31
9	10.2.188.32/30	10.2.188.33 – 10.2.188.34	10.2.188.35
10	10.2.188.36/30	10.2.188.37 – 10.2.188.38	10.2.188.39
11	10.2.188.40/30	10.2.188.41 – 10.2.188.42	10.2.188.43
12	10.2.188.44/30	10.2.188.45 – 10.2.188.46	10.2.188.47
13	10.2.188.48/30	10.2.188.49 – 10.2.188.50	10.2.188.51
14	10.2.188.52/30	10.2.188.53 – 10.2.188.54	10.2.188.55
15	10.2.188.56/30	10.2.188.57 – 10.2.188.58	10.2.188.59
16	10.2.188.60/30	10.2.188.61 – 10.2.188.62	10.2.188.63
17	10.2.188.64/30	10.2.188.65 – 10.2.188.66	10.2.188.67
18	10.2.188.68/30	10.2.188.69 – 10.2.188.70	10.2.188.71
19	10.2.188.72/30	10.2.188.73 – 10.2.188.74	10.2.188.75
20	10.2.188.76/30	10.2.188.77 – 10.2.188.78	10.2.188.79
21	10.2.188.80/30	10.2.188.81 – 10.2.188.82	10.2.188.83
22	10.2.188.84/30	10.2.188.85 – 10.2.188.86	10.2.188.87
23	10.2.188.88/30	10.2.188.89 – 10.2.188.90	10.2.188.91
24	10.2.188.92/30	10.2.188.93 – 10.2.188.94	10.2.188.95
25	10.2.188.96/30	10.2.188.97 – 10.2.188.98	10.2.188.99
26	10.2.188.100/30	10.2.188.101 – 10.2.188.102	10.2.188.103
27	10.2.188.104/30	10.2.188.105 – 10.2.188.106	10.2.188.107
28	10.2.188.108/30	10.2.188.109 – 10.2.188.110	10.2.188.111
29	10.2.188.112/30	10.2.188.113 – 10.2.188.114	10.2.188.115
30	10.2.188.116/30	10.2.188.117 – 10.2.188.118	10.2.188.119
31	10.2.188.120/30	10.2.188.121 – 10.2.188.122	10.2.188.123
32	10.2.188.124/30	10.2.188.125 – 10.2.188.126	10.2.188.127
33	10.2.188.128/30	10.2.188.129 – 10.2.188.130	10.2.188.131
34	10.2.188.132/30	10.2.188.133 – 10.2.188.134	10.2.188.135
35	10.2.188.136/30	10.2.188.137 – 10.2.188.138	10.2.188.139
36	10.2.188.140/30	10.2.188.141 – 10.2.188.142	10.2.188.143
37	10.2.188.144/30	10.2.188.145 – 10.2.188.146	10.2.188.147
38	10.2.188.148/30	10.2.188.149 – 10.2.188.150	10.2.188.151
39	10.2.188.152/30	10.2.188.153 – 10.2.188.154	10.2.188.155
40	10.2.188.156/30	10.2.188.157 – 10.2.188.158	10.2.188.159
41	10.2.188.160/30	10.2.188.161 – 10.2.188.162	10.2.188.163
42	10.2.188.164/30	10.2.188.165 – 10.2.188.166	10.2.188.167
43	10.2.188.168/30	10.2.188.169 – 10.2.188.170	10.2.188.171
44	10.2.188.172/30	10.2.188.173 – 10.2.188.174	10.2.188.175
45	10.2.188.176/30	10.2.188.177 – 10.2.188.178	10.2.188.179
46	10.2.188.180/30	10.2.188.181 – 10.2.188.182	10.2.188.183
47	10.2.188.184/30	10.2.188.185 – 10.2.188.186	10.2.188.187
48	10.2.188.188/30	10.2.188.189 – 10.2.188.190	10.2.188.191
49	10.2.188.192/30	10.2.188.193 – 10.2.188.194	10.2.188.195
50	10.2.188.196/30	10.2.188.197 – 10.2.188.198	10.2.188.199
51	10.2.188.200/30	10.2.188.201 – 10.2.188.202	10.2.188.203
52	10.2.188.204/30	10.2.188.205 – 10.2.188.206	10.2.188.207
53	10.2.188.208/30	10.2.188.209 – 10.2.188.210	10.2.188.211
54	10.2.188.212/30	10.2.188.213 – 10.2.188.214	10.2.188.215
55	10.2.188.216/30	10.2.188.217 – 10.2.188.218	10.2.188.219
56	10.2.188.220/30	10.2.188.221 – 10.2.188.222	10.2.188.223
57	10.2.188.224/30	10.2.188.225 – 10.2.188.226	10.2.188.227
58	10.2.188.228/30	10.2.188.229 – 10.2.188.230	10.2.188.231
59	10.2.188.232/30	10.2.188.233 – 10.2.188.234	10.2.188.235
60	10.2.188.236/30	10.2.188.237 – 10.2.188.238	10.2.188.239
61	10.2.188.240/30	10.2.188.241 – 10.2.188.242	10.2.188.243
62	10.2.188.244/30	10.2.188.245 – 10.2.188.246	10.2.188.247
63	10.2.188.248/30	10.2.188.249 – 10.2.188.250	10.2.188.251
64	10.2.188.252/30	10.2.188.253 – 10.2.188.254	10.2.188.255
65	10.2.189.0/30	10.2.189.1 – 10.2.189.2	10.2.189.3
66	10.2.189.4/30	10.2.189.5 – 10.2.189.6	10.2.189.7
67	10.2.189.8/30	10.2.189.9 – 10.2.189.10	10.2.189.11
68	10.2.189.12/30	10.2.189.13 – 10.2.189.14	10.2.189.15
69	10.2.189.16/30	10.2.189.17 – 10.2.189.18	10.2.189.19
70	10.2.189.20/30	10.2.189.21 – 10.2.189.22	10.2.189.23
71	10.2.189.24/30	10.2.189.25 – 10.2.189.26	10.2.189.27
72	10.2.189.28/30	10.2.189.29 – 10.2.189.30	10.2.189.31
73	10.2.189.32/30	10.2.189.33 – 10.2.189.34	10.2.189.35
74	10.2.189.36/30	10.2.189.37 – 10.2.189.38	10.2.189.39
75	10.2.189.40/30	10.2.189.41 – 10.2.189.42	10.2.189.43
76	10.2.189.44/30	10.2.189.45 – 10.2.189.46	10.2.189.47
77	10.2.189.48/30	10.2.189.49 – 10.2.189.50	10.2.189.51
78	10.2.189.52/30	10.2.189.53 – 10.2.189.54	10.2.189.55
79	10.2.189.56/30	10.2.189.57 – 10.2.189.58	10.2.189.59
80	10.2.189.60/30	10.2.189.61 – 10.2.189.62	10.2.189.63
81	10.2.189.64/30	10.2.189.65 – 10.2.189.66	10.2.189.67
82	10.2.189.68/30	10.2.189.69 – 10.2.189.70	10.2.189.71
83	10.2.189.72/30	10.2.189.73 – 10.2.189.74	10.2.189.75
84	10.2.189.76/30	10.2.189.77 – 10.2.189.78	10.2.189.79
85	10.2.189.80/30	10.2.189.81 – 10.2.189.82	10.2.189.83
86	10.2.189.84/30	10.2.189.85 – 10.2.189.86	10.2.189.87
87	10.2.189.88/30	10.2.189.89 – 10.2.189.90	10.2.189.91
88	10.2.189.92/30	10.2.189.93 – 10.2.189.94	10.2.189.95
89	10.2.189.96/30	10.2.189.97 – 10.2.189.98	10.2.189.99
90	10.2.189.100/30	10.2.189.101 – 10.2.189.102	10.2.189.103
91	10.2.189.104/30	10.2.189.105 – 10.2.189.106	10.2.189.107
92	10.2.189.108/30	10.2.189.109 – 10.2.189.110	10.2.189.111
93	10.2.189.112/30	10.2.189.113 – 10.2.189.114	10.2.189.115
94	10.2.189.116/30	10.2.189.117 – 10.2.189.118	10.2.189.119
95	10.2.189.120/30	10.2.189.121 – 10.2.189.122	10.2.189.123
96	10.2.189.124/30	10.2.189.125 – 10.2.189.126	10.2.189.127
97	10.2.189.128/30	10.2.189.129 – 10.2.189.130	10.2.189.131
98	10.2.189.132/30	10.2.189.133 – 10.2.189.134	10.2.189.135
99	10.2.189.136/30	10.2.189.137 – 10.2.189.138	10.2.189.139
100	10.2.189.140/30	10.2.189.141 – 10.2.189.142	10.2.189.143
101	10.2.189.144/30	10.2.189.145 – 10.2.189.146	10.2.189.147
102	10.2.189.148/30	10.2.189.149 – 10.2.189.150	10.2.189.151
103	10.2.189.152/30	10.2.189.153 – 10.2.189.154	10.2.189.155
104	10.2.189.156/30	10.2.189.157 – 10.2.189.158	10.2.189.159
105	10.2.189.160/30	10.2.189.161 – 10.2.189.162	10.2.189.163
106	10.2.189.164/30	10.2.189.165 – 10.2.189.166	10.2.189.167
107	10.2.189.168/30	10.2.189.169 – 10.2.189.170	10.2.189.171
108	10.2.189.172/30	10.2.189.173 – 10.2.189.174	10.2.189.175
109	10.2.189.176/30	10.2.189.177 – 10.2.189.178	10.2.189.179
110	10.2.189.180/30	10.2.189.181 – 10.2.189.182	10.2.189.183
111	10.2.189.184/30	10.2.189.185 – 10.2.189.186	10.2.189.187
112	10.2.189.188/30	10.2.189.189 – 10.2.189.190	10.2.189.191
113	10.2.189.192/30	10.2.189.193 – 10.2.189.194	10.2.189.195
114	10.2.189.196/30	10.2.189.197 – 10.2.189.198	10.2.189.199
115	10.2.189.200/30	10.2.189.201 – 10.2.189.202	10.2.189.203
116	10.2.189.204/30	10.2.189.205 – 10.2.189.206	10.2.189.207
117	10.2.189.208/30	10.2.189.209 – 10.2.189.210	10.2.189.211
118	10.2.189.212/30	10.2.189.213 – 10.2.189.214	10.2.189.215
119	10.2.189.216/30	10.2.189.217 – 10.2.189.218	10.2.189.219
120	10.2.189.220/30	10.2.189.221 – 10.2.189.222	10.2.189.223
121	10.2.189.224/30	10.2.189.225 – 10.2.189.226	10.2.189.227
122	10.2.189.228/30	10.2.189.229 – 10.2.189.230	10.2.189.231
123	10.2.189.232/30	10.2.189.233 – 10.2.189.234	10.2.189.235
124	10.2.189.236/30	10.2.189.237 – 10.2.189.238	10.2.189.239
125	10.2.189.240/30	10.2.189.241 – 10.2.189.242	10.2.189.243
126	10.2.189.244/30	10.2.189.245 – 10.2.189.246	10.2.189.247
127	10.2.189.248/30	10.2.189.249 – 10.2.189.250	10.2.189.251
128	10.2.189.252/30	10.2.189.253 – 10.2.189.254	10.2.189.255
129	10.2.190.0/30	10.2.190.1 – 10.2.190.2	10.2.190.3
130	10.2.190.4/30	10.2.190.5 – 10.2.190.6	10.2.190.7
131	10.2.190.8/30	10.2.190.9 – 10.2.190.10	10.2.190.11
132	10.2.190.12/30	10.2.190.13 – 10.2.190.14	10.2.190.15
133	10.2.190.16/30	10.2.190.17 – 10.2.190.18	10.2.190.19
134	10.2.190.20/30	10.2.190.21 – 10.2.190.22	10.2.190.23
135	10.2.190.24/30	10.2.190.25 – 10.2.190.26	10.2.190.27
136	10.2.190.28/30	10.2.190.29 – 10.2.190.30	10.2.190.31
137	10.2.190.32/30	10.2.190.33 – 10.2.190.34	10.2.190.35
138	10.2.190.36/30	10.2.190.37 – 10.2.190.38	10.2.190.39
139	10.2.190.40/30	10.2.190.41 – 10.2.190.42	10.2.190.43
140	10.2.190.44/30	10.2.190.45 – 10.2.190.46	10.2.190.47
141	10.2.190.48/30	10.2.190.49 – 10.2.190.50	10.2.190.51
142	10.2.190.52/30	10.2.190.53 – 10.2.190.54	10.2.190.55
143	10.2.190.56/30	10.2.190.57 – 10.2.190.58	10.2.190.59
144	10.2.190.60/30	10.2.190.61 – 10.2.190.62	10.2.190.63
145	10.2.190.64/30	10.2.190.65 – 10.2.190.66	10.2.190.67
146	10.2.190.68/30	10.2.190.69 – 10.2.190.70	10.2.190.71
147	10.2.190.72/30	10.2.190.73 – 10.2.190.74	10.2.190.75
148	10.2.190.76/30	10.2.190.77 – 10.2.190.78	10.2.190.79
149	10.2.190.80/30	10.2.190.81 – 10.2.190.82	10.2.190.83
150	10.2.190.84/30	10.2.190.85 – 10.2.190.86	10.2.190.87
151	10.2.190.88/30	10.2.190.89 – 10.2.190.90	10.2.190.91
152	10.2.190.92/30	10.2.190.93 – 10.2.190.94	10.2.190.95
153	10.2.190.96/30	10.2.190.97 – 10.2.190.98	10.2.190.99
154	10.2.190.100/30	10.2.190.101 – 10.2.190.102	10.2.190.103
155	10.2.190.104/30	10.2.190.105 – 10.2.190.106	10.2.190.107
156	10.2.190.108/30	10.2.190.109 – 10.2.190.110	10.2.190.111
157	10.2.190.112/30	10.2.190.113 – 10.2.190.114	10.2.190.115
158	10.2.190.116/30	10.2.190.117 – 10.2.190.118	10.2.190.119
159	10.2.190.120/30	10.2.190.121 – 10.2.190.122	10.2.190.123
160	10.2.190.124/30	10.2.190.125 – 10.2.190.126	10.2.190.127
161	10.2.190.128/30	10.2.190.129 – 10.2.190.130	10.2.190.131
162	10.2.190.132/30	10.2.190.133 – 10.2.190.134	10.2.190.135
163	10.2.190.136/30	10.2.190.137 – 10.2.190.138	10.2.190.139
164	10.2.190.140/30	10.2.190.141 – 10.2.190.142	10.2.190.143
165	10.2.190.144/30	10.2.190.145 – 10.2.190.146	10.2.190.147
166	10.2.190.148/30	10.2.190.149 – 10.2.190.150	10.2.190.151
167	10.2.190.152/30	10.2.190.153 – 10.2.190.154	10.2.190.155
168	10.2.190.156/30	10.2.190.157 – 10.2.190.158	10.2.190.159
169	10.2.190.160/30	10.2.190.161 – 10.2.190.162	10.2.190.163
170	10.2.190.164/30	10.2.190.165 – 10.2.190.166	10.2.190.167
171	10.2.190.168/30	10.2.190.169 – 10.2.190.170	10.2.190.171
172	10.2.190.172/30	10.2.190.173 – 10.2.190.174	10.2.190.175
173	10.2.190.176/30	10.2.190.177 – 10.2.190.178	10.2.190.179
174	10.2.190.180/30	10.2.190.181 – 10.2.190.182	10.2.190.183
175	10.2.190.184/30	10.2.190.185 – 10.2.190.186	10.2.190.187
176	10.2.190.188/30	10.2.190.189 – 10.2.190.190	10.2.190.191
177	10.2.190.192/30	10.2.190.193 – 10.2.190.194	10.2.190.195
178	10.2.190.196/30	10.2.190.197 – 10.2.190.198	10.2.190.199
179	10.2.190.200/30	10.2.190.201 – 10.2.190.202	10.2.190.203
180	10.2.190.204/30	10.2.190.205 – 10.2.190.206	10.2.190.207
181	10.2.190.208/30	10.2.190.209 – 10.2.190.210	10.2.190.211
182	10.2.190.212/30	10.2.190.213 – 10.2.190.214	10.2.190.215
183	10.2.190.216/30	10.2.190.217 – 10.2.190.218	10.2.190.219
184	10.2.190.220/30	10.2.190.221 – 10.2.190.222	10.2.190.223
185	10.2.190.224/30	10.2.190.225 – 10.2.190.226	10.2.190.227
186	10.2.190.228/30	10.2.190.229 – 10.2.190.230	10.2.190.231
187	10.2.190.232/30	10.2.190.233 – 10.2.190.234	10.2.190.235
188	10.2.190.236/30	10.2.190.237 – 10.2.190.238	10.2.190.239
189	10.2.190.240/30	10.2.190.241 – 10.2.190.242	10.2.190.243
190	10.2.190.244/30	10.2.190.245 – 10.2.190.246	10.2.190.247
191	10.2.190.248/30	10.2.190.249 – 10.2.190.250	10.2.190.251
192	10.2.190.252/30	10.2.190.253 – 10.2.190.254	10.2.190.255
193	10.2.191.0/30	10.2.191.1 – 10.2.191.2	10.2.191.3
194	10.2.191.4/30	10.2.191.5 – 10.2.191.6	10.2.191.7
195	10.2.191.8/30	10.2.191.9 – 10.2.191.10	10.2.191.11
196	10.2.191.12/30	10.2.191.13 – 10.2.191.14	10.2.191.15
197	10.2.191.16/30	10.2.191.17 – 10.2.191.18	10.2.191.19
198	10.2.191.20/30	10.2.191.21 – 10.2.191.22	10.2.191.23
199	10.2.191.24/30	10.2.191.25 – 10.2.191.26	10.2.191.27
200	10.2.191.28/30	10.2.191.29 – 10.2.191.30	10.2.191.31
201	10.2.191.32/30	10.2.191.33 – 10.2.191.34	10.2.191.35
202	10.2.191.36/30	10.2.191.37 – 10.2.191.38	10.2.191.39
203	10.2.191.40/30	10.2.191.41 – 10.2.191.42	10.2.191.43
204	10.2.191.44/30	10.2.191.45 – 10.2.191.46	10.2.191.47
205	10.2.191.48/30	10.2.191.49 – 10.2.191.50	10.2.191.51
206	10.2.191.52/30	10.2.191.53 – 10.2.191.54	10.2.191.55
207	10.2.191.56/30	10.2.191.57 – 10.2.191.58	10.2.191.59
208	10.2.191.60/30	10.2.191.61 – 10.2.191.62	10.2.191.63
209	10.2.191.64/30	10.2.191.65 – 10.2.191.66	10.2.191.67
210	10.2.191.68/30	10.2.191.69 – 10.2.191.70	10.2.191.71
211	10.2.191.72/30	10.2.191.73 – 10.2.191.74	10.2.191.75
212	10.2.191.76/30	10.2.191.77 – 10.2.191.78	10.2.191.79
213	10.2.191.80/30	10.2.191.81 – 10.2.191.82	10.2.191.83
214	10.2.191.84/30	10.2.191.85 – 10.2.191.86	10.2.191.87
215	10.2.191.88/30	10.2.191.89 – 10.2.191.90	10.2.191.91
216	10.2.191.92/30	10.2.191.93 – 10.2.191.94	10.2.191.95
217	10.2.191.96/30	10.2.191.97 – 10.2.191.98	10.2.191.99
218	10.2.191.100/30	10.2.191.101 – 10.2.191.102	10.2.191.103
219	10.2.191.104/30	10.2.191.105 – 10.2.191.106	10.2.191.107
220	10.2.191.108/30	10.2.191.109 – 10.2.191.110	10.2.191.111
221	10.2.191.112/30	10.2.191.113 – 10.2.191.114	10.2.191.115
222	10.2.191.116/30	10.2.191.117 – 10.2.191.118	10.2.191.119
223	10.2.191.120/30	10.2.191.121 – 10.2.191.122	10.2.191.123
224	10.2.191.124/30	10.2.191.125 – 10.2.191.126	10.2.191.127
225	10.2.191.128/30	10.2.191.129 – 10.2.191.130	10.2.191.131
226	10.2.191.132/30	10.2.191.133 – 10.2.191.134	10.2.191.135
227	10.2.191.136/30	10.2.191.137 – 10.2.191.138	10.2.191.139
228	10.2.191.140/30	10.2.191.141 – 10.2.191.142	10.2.191.143
229	10.2.191.144/30	10.2.191.145 – 10.2.191.146	10.2.191.147
230	10.2.191.148/30	10.2.191.149 – 10.2.191.150	10.2.191.151
231	10.2.191.152/30	10.2.191.153 – 10.2.191.154	10.2.191.155
232	10.2.191.156/30	10.2.191.157 – 10.2.191.158	10.2.191.159
233	10.2.191.160/30	10.2.191.161 – 10.2.191.162	10.2.191.163
234	10.2.191.164/30	10.2.191.165 – 10.2.191.166	10.2.191.167
235	10.2.191.168/30	10.2.191.169 – 10.2.191.170	10.2.191.171
236	10.2.191.172/30	10.2.191.173 – 10.2.191.174	10.2.191.175
237	10.2.191.176/30	10.2.191.177 – 10.2.191.178	10.2.191.179
238	10.2.191.180/30	10.2.191.181 – 10.2.191.182	10.2.191.183
239	10.2.191.184/30	10.2.191.185 – 10.2.191.186	10.2.191.187
240	10.2.191.188/30	10.2.191.189 – 10.2.191.190	10.2.191.191
241	10.2.191.192/30	10.2.191.193 – 10.2.191.194	10.2.191.195
242	10.2.191.196/30	10.2.191.197 – 10.2.191.198	10.2.191.199
243	10.2.191.200/30	10.2.191.201 – 10.2.191.202	10.2.191.203
244	10.2.191.204/30	10.2.191.205 – 10.2.191.206	10.2.191.207
245	10.2.191.208/30	10.2.191.209 – 10.2.191.210	10.2.191.211
246	10.2.191.212/30	10.2.191.213 – 10.2.191.214	10.2.191.215
247	10.2.191.216/30	10.2.191.217 – 10.2.191.218	10.2.191.219
248	10.2.191.220/30	10.2.191.221 – 10.2.191.222	10.2.191.223
249	10.2.191.224/30	10.2.191.225 – 10.2.191.226	10.2.191.227
250	10.2.191.228/30	10.2.191.229 – 10.2.191.230	10.2.191.231
251	10.2.191.232/30	10.2.191.233 – 10.2.191.234	10.2.191.235
252	10.2.191.236/30	10.2.191.237 – 10.2.191.238	10.2.191.239
253	10.2.191.240/30	10.2.191.241 – 10.2.191.242	10.2.191.243
254	10.2.191.244/30	10.2.191.245 – 10.2.191.246	10.2.191.247
255	10.2.191.248/30	10.2.191.249 – 10.2.191.250	10.2.191.251
256	10.2.191.252/30	10.2.191.253 – 10.2.191.254	10.2.191.255

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 →