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)10.3.156.0/22

network10.3.156.0/22

broadcast10.3.159.255

first host10.3.156.1

last host10.3.159.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.156.0/22

address00001010.00000011.10011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10011100.00000000

broadcast00001010.00000011.10011111.11111111

green = network part, grey = host part

hex0x0a039c00

decimal168008704

reverse dns0.156.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:9c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.156.0/30	10.3.156.1 – 10.3.156.2	10.3.156.3
2	10.3.156.4/30	10.3.156.5 – 10.3.156.6	10.3.156.7
3	10.3.156.8/30	10.3.156.9 – 10.3.156.10	10.3.156.11
4	10.3.156.12/30	10.3.156.13 – 10.3.156.14	10.3.156.15
5	10.3.156.16/30	10.3.156.17 – 10.3.156.18	10.3.156.19
6	10.3.156.20/30	10.3.156.21 – 10.3.156.22	10.3.156.23
7	10.3.156.24/30	10.3.156.25 – 10.3.156.26	10.3.156.27
8	10.3.156.28/30	10.3.156.29 – 10.3.156.30	10.3.156.31
9	10.3.156.32/30	10.3.156.33 – 10.3.156.34	10.3.156.35
10	10.3.156.36/30	10.3.156.37 – 10.3.156.38	10.3.156.39
11	10.3.156.40/30	10.3.156.41 – 10.3.156.42	10.3.156.43
12	10.3.156.44/30	10.3.156.45 – 10.3.156.46	10.3.156.47
13	10.3.156.48/30	10.3.156.49 – 10.3.156.50	10.3.156.51
14	10.3.156.52/30	10.3.156.53 – 10.3.156.54	10.3.156.55
15	10.3.156.56/30	10.3.156.57 – 10.3.156.58	10.3.156.59
16	10.3.156.60/30	10.3.156.61 – 10.3.156.62	10.3.156.63
17	10.3.156.64/30	10.3.156.65 – 10.3.156.66	10.3.156.67
18	10.3.156.68/30	10.3.156.69 – 10.3.156.70	10.3.156.71
19	10.3.156.72/30	10.3.156.73 – 10.3.156.74	10.3.156.75
20	10.3.156.76/30	10.3.156.77 – 10.3.156.78	10.3.156.79
21	10.3.156.80/30	10.3.156.81 – 10.3.156.82	10.3.156.83
22	10.3.156.84/30	10.3.156.85 – 10.3.156.86	10.3.156.87
23	10.3.156.88/30	10.3.156.89 – 10.3.156.90	10.3.156.91
24	10.3.156.92/30	10.3.156.93 – 10.3.156.94	10.3.156.95
25	10.3.156.96/30	10.3.156.97 – 10.3.156.98	10.3.156.99
26	10.3.156.100/30	10.3.156.101 – 10.3.156.102	10.3.156.103
27	10.3.156.104/30	10.3.156.105 – 10.3.156.106	10.3.156.107
28	10.3.156.108/30	10.3.156.109 – 10.3.156.110	10.3.156.111
29	10.3.156.112/30	10.3.156.113 – 10.3.156.114	10.3.156.115
30	10.3.156.116/30	10.3.156.117 – 10.3.156.118	10.3.156.119
31	10.3.156.120/30	10.3.156.121 – 10.3.156.122	10.3.156.123
32	10.3.156.124/30	10.3.156.125 – 10.3.156.126	10.3.156.127
33	10.3.156.128/30	10.3.156.129 – 10.3.156.130	10.3.156.131
34	10.3.156.132/30	10.3.156.133 – 10.3.156.134	10.3.156.135
35	10.3.156.136/30	10.3.156.137 – 10.3.156.138	10.3.156.139
36	10.3.156.140/30	10.3.156.141 – 10.3.156.142	10.3.156.143
37	10.3.156.144/30	10.3.156.145 – 10.3.156.146	10.3.156.147
38	10.3.156.148/30	10.3.156.149 – 10.3.156.150	10.3.156.151
39	10.3.156.152/30	10.3.156.153 – 10.3.156.154	10.3.156.155
40	10.3.156.156/30	10.3.156.157 – 10.3.156.158	10.3.156.159
41	10.3.156.160/30	10.3.156.161 – 10.3.156.162	10.3.156.163
42	10.3.156.164/30	10.3.156.165 – 10.3.156.166	10.3.156.167
43	10.3.156.168/30	10.3.156.169 – 10.3.156.170	10.3.156.171
44	10.3.156.172/30	10.3.156.173 – 10.3.156.174	10.3.156.175
45	10.3.156.176/30	10.3.156.177 – 10.3.156.178	10.3.156.179
46	10.3.156.180/30	10.3.156.181 – 10.3.156.182	10.3.156.183
47	10.3.156.184/30	10.3.156.185 – 10.3.156.186	10.3.156.187
48	10.3.156.188/30	10.3.156.189 – 10.3.156.190	10.3.156.191
49	10.3.156.192/30	10.3.156.193 – 10.3.156.194	10.3.156.195
50	10.3.156.196/30	10.3.156.197 – 10.3.156.198	10.3.156.199
51	10.3.156.200/30	10.3.156.201 – 10.3.156.202	10.3.156.203
52	10.3.156.204/30	10.3.156.205 – 10.3.156.206	10.3.156.207
53	10.3.156.208/30	10.3.156.209 – 10.3.156.210	10.3.156.211
54	10.3.156.212/30	10.3.156.213 – 10.3.156.214	10.3.156.215
55	10.3.156.216/30	10.3.156.217 – 10.3.156.218	10.3.156.219
56	10.3.156.220/30	10.3.156.221 – 10.3.156.222	10.3.156.223
57	10.3.156.224/30	10.3.156.225 – 10.3.156.226	10.3.156.227
58	10.3.156.228/30	10.3.156.229 – 10.3.156.230	10.3.156.231
59	10.3.156.232/30	10.3.156.233 – 10.3.156.234	10.3.156.235
60	10.3.156.236/30	10.3.156.237 – 10.3.156.238	10.3.156.239
61	10.3.156.240/30	10.3.156.241 – 10.3.156.242	10.3.156.243
62	10.3.156.244/30	10.3.156.245 – 10.3.156.246	10.3.156.247
63	10.3.156.248/30	10.3.156.249 – 10.3.156.250	10.3.156.251
64	10.3.156.252/30	10.3.156.253 – 10.3.156.254	10.3.156.255
65	10.3.157.0/30	10.3.157.1 – 10.3.157.2	10.3.157.3
66	10.3.157.4/30	10.3.157.5 – 10.3.157.6	10.3.157.7
67	10.3.157.8/30	10.3.157.9 – 10.3.157.10	10.3.157.11
68	10.3.157.12/30	10.3.157.13 – 10.3.157.14	10.3.157.15
69	10.3.157.16/30	10.3.157.17 – 10.3.157.18	10.3.157.19
70	10.3.157.20/30	10.3.157.21 – 10.3.157.22	10.3.157.23
71	10.3.157.24/30	10.3.157.25 – 10.3.157.26	10.3.157.27
72	10.3.157.28/30	10.3.157.29 – 10.3.157.30	10.3.157.31
73	10.3.157.32/30	10.3.157.33 – 10.3.157.34	10.3.157.35
74	10.3.157.36/30	10.3.157.37 – 10.3.157.38	10.3.157.39
75	10.3.157.40/30	10.3.157.41 – 10.3.157.42	10.3.157.43
76	10.3.157.44/30	10.3.157.45 – 10.3.157.46	10.3.157.47
77	10.3.157.48/30	10.3.157.49 – 10.3.157.50	10.3.157.51
78	10.3.157.52/30	10.3.157.53 – 10.3.157.54	10.3.157.55
79	10.3.157.56/30	10.3.157.57 – 10.3.157.58	10.3.157.59
80	10.3.157.60/30	10.3.157.61 – 10.3.157.62	10.3.157.63
81	10.3.157.64/30	10.3.157.65 – 10.3.157.66	10.3.157.67
82	10.3.157.68/30	10.3.157.69 – 10.3.157.70	10.3.157.71
83	10.3.157.72/30	10.3.157.73 – 10.3.157.74	10.3.157.75
84	10.3.157.76/30	10.3.157.77 – 10.3.157.78	10.3.157.79
85	10.3.157.80/30	10.3.157.81 – 10.3.157.82	10.3.157.83
86	10.3.157.84/30	10.3.157.85 – 10.3.157.86	10.3.157.87
87	10.3.157.88/30	10.3.157.89 – 10.3.157.90	10.3.157.91
88	10.3.157.92/30	10.3.157.93 – 10.3.157.94	10.3.157.95
89	10.3.157.96/30	10.3.157.97 – 10.3.157.98	10.3.157.99
90	10.3.157.100/30	10.3.157.101 – 10.3.157.102	10.3.157.103
91	10.3.157.104/30	10.3.157.105 – 10.3.157.106	10.3.157.107
92	10.3.157.108/30	10.3.157.109 – 10.3.157.110	10.3.157.111
93	10.3.157.112/30	10.3.157.113 – 10.3.157.114	10.3.157.115
94	10.3.157.116/30	10.3.157.117 – 10.3.157.118	10.3.157.119
95	10.3.157.120/30	10.3.157.121 – 10.3.157.122	10.3.157.123
96	10.3.157.124/30	10.3.157.125 – 10.3.157.126	10.3.157.127
97	10.3.157.128/30	10.3.157.129 – 10.3.157.130	10.3.157.131
98	10.3.157.132/30	10.3.157.133 – 10.3.157.134	10.3.157.135
99	10.3.157.136/30	10.3.157.137 – 10.3.157.138	10.3.157.139
100	10.3.157.140/30	10.3.157.141 – 10.3.157.142	10.3.157.143
101	10.3.157.144/30	10.3.157.145 – 10.3.157.146	10.3.157.147
102	10.3.157.148/30	10.3.157.149 – 10.3.157.150	10.3.157.151
103	10.3.157.152/30	10.3.157.153 – 10.3.157.154	10.3.157.155
104	10.3.157.156/30	10.3.157.157 – 10.3.157.158	10.3.157.159
105	10.3.157.160/30	10.3.157.161 – 10.3.157.162	10.3.157.163
106	10.3.157.164/30	10.3.157.165 – 10.3.157.166	10.3.157.167
107	10.3.157.168/30	10.3.157.169 – 10.3.157.170	10.3.157.171
108	10.3.157.172/30	10.3.157.173 – 10.3.157.174	10.3.157.175
109	10.3.157.176/30	10.3.157.177 – 10.3.157.178	10.3.157.179
110	10.3.157.180/30	10.3.157.181 – 10.3.157.182	10.3.157.183
111	10.3.157.184/30	10.3.157.185 – 10.3.157.186	10.3.157.187
112	10.3.157.188/30	10.3.157.189 – 10.3.157.190	10.3.157.191
113	10.3.157.192/30	10.3.157.193 – 10.3.157.194	10.3.157.195
114	10.3.157.196/30	10.3.157.197 – 10.3.157.198	10.3.157.199
115	10.3.157.200/30	10.3.157.201 – 10.3.157.202	10.3.157.203
116	10.3.157.204/30	10.3.157.205 – 10.3.157.206	10.3.157.207
117	10.3.157.208/30	10.3.157.209 – 10.3.157.210	10.3.157.211
118	10.3.157.212/30	10.3.157.213 – 10.3.157.214	10.3.157.215
119	10.3.157.216/30	10.3.157.217 – 10.3.157.218	10.3.157.219
120	10.3.157.220/30	10.3.157.221 – 10.3.157.222	10.3.157.223
121	10.3.157.224/30	10.3.157.225 – 10.3.157.226	10.3.157.227
122	10.3.157.228/30	10.3.157.229 – 10.3.157.230	10.3.157.231
123	10.3.157.232/30	10.3.157.233 – 10.3.157.234	10.3.157.235
124	10.3.157.236/30	10.3.157.237 – 10.3.157.238	10.3.157.239
125	10.3.157.240/30	10.3.157.241 – 10.3.157.242	10.3.157.243
126	10.3.157.244/30	10.3.157.245 – 10.3.157.246	10.3.157.247
127	10.3.157.248/30	10.3.157.249 – 10.3.157.250	10.3.157.251
128	10.3.157.252/30	10.3.157.253 – 10.3.157.254	10.3.157.255
129	10.3.158.0/30	10.3.158.1 – 10.3.158.2	10.3.158.3
130	10.3.158.4/30	10.3.158.5 – 10.3.158.6	10.3.158.7
131	10.3.158.8/30	10.3.158.9 – 10.3.158.10	10.3.158.11
132	10.3.158.12/30	10.3.158.13 – 10.3.158.14	10.3.158.15
133	10.3.158.16/30	10.3.158.17 – 10.3.158.18	10.3.158.19
134	10.3.158.20/30	10.3.158.21 – 10.3.158.22	10.3.158.23
135	10.3.158.24/30	10.3.158.25 – 10.3.158.26	10.3.158.27
136	10.3.158.28/30	10.3.158.29 – 10.3.158.30	10.3.158.31
137	10.3.158.32/30	10.3.158.33 – 10.3.158.34	10.3.158.35
138	10.3.158.36/30	10.3.158.37 – 10.3.158.38	10.3.158.39
139	10.3.158.40/30	10.3.158.41 – 10.3.158.42	10.3.158.43
140	10.3.158.44/30	10.3.158.45 – 10.3.158.46	10.3.158.47
141	10.3.158.48/30	10.3.158.49 – 10.3.158.50	10.3.158.51
142	10.3.158.52/30	10.3.158.53 – 10.3.158.54	10.3.158.55
143	10.3.158.56/30	10.3.158.57 – 10.3.158.58	10.3.158.59
144	10.3.158.60/30	10.3.158.61 – 10.3.158.62	10.3.158.63
145	10.3.158.64/30	10.3.158.65 – 10.3.158.66	10.3.158.67
146	10.3.158.68/30	10.3.158.69 – 10.3.158.70	10.3.158.71
147	10.3.158.72/30	10.3.158.73 – 10.3.158.74	10.3.158.75
148	10.3.158.76/30	10.3.158.77 – 10.3.158.78	10.3.158.79
149	10.3.158.80/30	10.3.158.81 – 10.3.158.82	10.3.158.83
150	10.3.158.84/30	10.3.158.85 – 10.3.158.86	10.3.158.87
151	10.3.158.88/30	10.3.158.89 – 10.3.158.90	10.3.158.91
152	10.3.158.92/30	10.3.158.93 – 10.3.158.94	10.3.158.95
153	10.3.158.96/30	10.3.158.97 – 10.3.158.98	10.3.158.99
154	10.3.158.100/30	10.3.158.101 – 10.3.158.102	10.3.158.103
155	10.3.158.104/30	10.3.158.105 – 10.3.158.106	10.3.158.107
156	10.3.158.108/30	10.3.158.109 – 10.3.158.110	10.3.158.111
157	10.3.158.112/30	10.3.158.113 – 10.3.158.114	10.3.158.115
158	10.3.158.116/30	10.3.158.117 – 10.3.158.118	10.3.158.119
159	10.3.158.120/30	10.3.158.121 – 10.3.158.122	10.3.158.123
160	10.3.158.124/30	10.3.158.125 – 10.3.158.126	10.3.158.127
161	10.3.158.128/30	10.3.158.129 – 10.3.158.130	10.3.158.131
162	10.3.158.132/30	10.3.158.133 – 10.3.158.134	10.3.158.135
163	10.3.158.136/30	10.3.158.137 – 10.3.158.138	10.3.158.139
164	10.3.158.140/30	10.3.158.141 – 10.3.158.142	10.3.158.143
165	10.3.158.144/30	10.3.158.145 – 10.3.158.146	10.3.158.147
166	10.3.158.148/30	10.3.158.149 – 10.3.158.150	10.3.158.151
167	10.3.158.152/30	10.3.158.153 – 10.3.158.154	10.3.158.155
168	10.3.158.156/30	10.3.158.157 – 10.3.158.158	10.3.158.159
169	10.3.158.160/30	10.3.158.161 – 10.3.158.162	10.3.158.163
170	10.3.158.164/30	10.3.158.165 – 10.3.158.166	10.3.158.167
171	10.3.158.168/30	10.3.158.169 – 10.3.158.170	10.3.158.171
172	10.3.158.172/30	10.3.158.173 – 10.3.158.174	10.3.158.175
173	10.3.158.176/30	10.3.158.177 – 10.3.158.178	10.3.158.179
174	10.3.158.180/30	10.3.158.181 – 10.3.158.182	10.3.158.183
175	10.3.158.184/30	10.3.158.185 – 10.3.158.186	10.3.158.187
176	10.3.158.188/30	10.3.158.189 – 10.3.158.190	10.3.158.191
177	10.3.158.192/30	10.3.158.193 – 10.3.158.194	10.3.158.195
178	10.3.158.196/30	10.3.158.197 – 10.3.158.198	10.3.158.199
179	10.3.158.200/30	10.3.158.201 – 10.3.158.202	10.3.158.203
180	10.3.158.204/30	10.3.158.205 – 10.3.158.206	10.3.158.207
181	10.3.158.208/30	10.3.158.209 – 10.3.158.210	10.3.158.211
182	10.3.158.212/30	10.3.158.213 – 10.3.158.214	10.3.158.215
183	10.3.158.216/30	10.3.158.217 – 10.3.158.218	10.3.158.219
184	10.3.158.220/30	10.3.158.221 – 10.3.158.222	10.3.158.223
185	10.3.158.224/30	10.3.158.225 – 10.3.158.226	10.3.158.227
186	10.3.158.228/30	10.3.158.229 – 10.3.158.230	10.3.158.231
187	10.3.158.232/30	10.3.158.233 – 10.3.158.234	10.3.158.235
188	10.3.158.236/30	10.3.158.237 – 10.3.158.238	10.3.158.239
189	10.3.158.240/30	10.3.158.241 – 10.3.158.242	10.3.158.243
190	10.3.158.244/30	10.3.158.245 – 10.3.158.246	10.3.158.247
191	10.3.158.248/30	10.3.158.249 – 10.3.158.250	10.3.158.251
192	10.3.158.252/30	10.3.158.253 – 10.3.158.254	10.3.158.255
193	10.3.159.0/30	10.3.159.1 – 10.3.159.2	10.3.159.3
194	10.3.159.4/30	10.3.159.5 – 10.3.159.6	10.3.159.7
195	10.3.159.8/30	10.3.159.9 – 10.3.159.10	10.3.159.11
196	10.3.159.12/30	10.3.159.13 – 10.3.159.14	10.3.159.15
197	10.3.159.16/30	10.3.159.17 – 10.3.159.18	10.3.159.19
198	10.3.159.20/30	10.3.159.21 – 10.3.159.22	10.3.159.23
199	10.3.159.24/30	10.3.159.25 – 10.3.159.26	10.3.159.27
200	10.3.159.28/30	10.3.159.29 – 10.3.159.30	10.3.159.31
201	10.3.159.32/30	10.3.159.33 – 10.3.159.34	10.3.159.35
202	10.3.159.36/30	10.3.159.37 – 10.3.159.38	10.3.159.39
203	10.3.159.40/30	10.3.159.41 – 10.3.159.42	10.3.159.43
204	10.3.159.44/30	10.3.159.45 – 10.3.159.46	10.3.159.47
205	10.3.159.48/30	10.3.159.49 – 10.3.159.50	10.3.159.51
206	10.3.159.52/30	10.3.159.53 – 10.3.159.54	10.3.159.55
207	10.3.159.56/30	10.3.159.57 – 10.3.159.58	10.3.159.59
208	10.3.159.60/30	10.3.159.61 – 10.3.159.62	10.3.159.63
209	10.3.159.64/30	10.3.159.65 – 10.3.159.66	10.3.159.67
210	10.3.159.68/30	10.3.159.69 – 10.3.159.70	10.3.159.71
211	10.3.159.72/30	10.3.159.73 – 10.3.159.74	10.3.159.75
212	10.3.159.76/30	10.3.159.77 – 10.3.159.78	10.3.159.79
213	10.3.159.80/30	10.3.159.81 – 10.3.159.82	10.3.159.83
214	10.3.159.84/30	10.3.159.85 – 10.3.159.86	10.3.159.87
215	10.3.159.88/30	10.3.159.89 – 10.3.159.90	10.3.159.91
216	10.3.159.92/30	10.3.159.93 – 10.3.159.94	10.3.159.95
217	10.3.159.96/30	10.3.159.97 – 10.3.159.98	10.3.159.99
218	10.3.159.100/30	10.3.159.101 – 10.3.159.102	10.3.159.103
219	10.3.159.104/30	10.3.159.105 – 10.3.159.106	10.3.159.107
220	10.3.159.108/30	10.3.159.109 – 10.3.159.110	10.3.159.111
221	10.3.159.112/30	10.3.159.113 – 10.3.159.114	10.3.159.115
222	10.3.159.116/30	10.3.159.117 – 10.3.159.118	10.3.159.119
223	10.3.159.120/30	10.3.159.121 – 10.3.159.122	10.3.159.123
224	10.3.159.124/30	10.3.159.125 – 10.3.159.126	10.3.159.127
225	10.3.159.128/30	10.3.159.129 – 10.3.159.130	10.3.159.131
226	10.3.159.132/30	10.3.159.133 – 10.3.159.134	10.3.159.135
227	10.3.159.136/30	10.3.159.137 – 10.3.159.138	10.3.159.139
228	10.3.159.140/30	10.3.159.141 – 10.3.159.142	10.3.159.143
229	10.3.159.144/30	10.3.159.145 – 10.3.159.146	10.3.159.147
230	10.3.159.148/30	10.3.159.149 – 10.3.159.150	10.3.159.151
231	10.3.159.152/30	10.3.159.153 – 10.3.159.154	10.3.159.155
232	10.3.159.156/30	10.3.159.157 – 10.3.159.158	10.3.159.159
233	10.3.159.160/30	10.3.159.161 – 10.3.159.162	10.3.159.163
234	10.3.159.164/30	10.3.159.165 – 10.3.159.166	10.3.159.167
235	10.3.159.168/30	10.3.159.169 – 10.3.159.170	10.3.159.171
236	10.3.159.172/30	10.3.159.173 – 10.3.159.174	10.3.159.175
237	10.3.159.176/30	10.3.159.177 – 10.3.159.178	10.3.159.179
238	10.3.159.180/30	10.3.159.181 – 10.3.159.182	10.3.159.183
239	10.3.159.184/30	10.3.159.185 – 10.3.159.186	10.3.159.187
240	10.3.159.188/30	10.3.159.189 – 10.3.159.190	10.3.159.191
241	10.3.159.192/30	10.3.159.193 – 10.3.159.194	10.3.159.195
242	10.3.159.196/30	10.3.159.197 – 10.3.159.198	10.3.159.199
243	10.3.159.200/30	10.3.159.201 – 10.3.159.202	10.3.159.203
244	10.3.159.204/30	10.3.159.205 – 10.3.159.206	10.3.159.207
245	10.3.159.208/30	10.3.159.209 – 10.3.159.210	10.3.159.211
246	10.3.159.212/30	10.3.159.213 – 10.3.159.214	10.3.159.215
247	10.3.159.216/30	10.3.159.217 – 10.3.159.218	10.3.159.219
248	10.3.159.220/30	10.3.159.221 – 10.3.159.222	10.3.159.223
249	10.3.159.224/30	10.3.159.225 – 10.3.159.226	10.3.159.227
250	10.3.159.228/30	10.3.159.229 – 10.3.159.230	10.3.159.231
251	10.3.159.232/30	10.3.159.233 – 10.3.159.234	10.3.159.235
252	10.3.159.236/30	10.3.159.237 – 10.3.159.238	10.3.159.239
253	10.3.159.240/30	10.3.159.241 – 10.3.159.242	10.3.159.243
254	10.3.159.244/30	10.3.159.245 – 10.3.159.246	10.3.159.247
255	10.3.159.248/30	10.3.159.249 – 10.3.159.250	10.3.159.251
256	10.3.159.252/30	10.3.159.253 – 10.3.159.254	10.3.159.255

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 →