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)10.3.108.0/22

network10.3.108.0/22

broadcast10.3.111.255

first host10.3.108.1

last host10.3.111.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.108.0/22

address00001010.00000011.01101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.01101100.00000000

broadcast00001010.00000011.01101111.11111111

green = network part, grey = host part

hex0x0a036c00

decimal167996416

reverse dns0.108.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:6c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.108.0/30	10.3.108.1 – 10.3.108.2	10.3.108.3
2	10.3.108.4/30	10.3.108.5 – 10.3.108.6	10.3.108.7
3	10.3.108.8/30	10.3.108.9 – 10.3.108.10	10.3.108.11
4	10.3.108.12/30	10.3.108.13 – 10.3.108.14	10.3.108.15
5	10.3.108.16/30	10.3.108.17 – 10.3.108.18	10.3.108.19
6	10.3.108.20/30	10.3.108.21 – 10.3.108.22	10.3.108.23
7	10.3.108.24/30	10.3.108.25 – 10.3.108.26	10.3.108.27
8	10.3.108.28/30	10.3.108.29 – 10.3.108.30	10.3.108.31
9	10.3.108.32/30	10.3.108.33 – 10.3.108.34	10.3.108.35
10	10.3.108.36/30	10.3.108.37 – 10.3.108.38	10.3.108.39
11	10.3.108.40/30	10.3.108.41 – 10.3.108.42	10.3.108.43
12	10.3.108.44/30	10.3.108.45 – 10.3.108.46	10.3.108.47
13	10.3.108.48/30	10.3.108.49 – 10.3.108.50	10.3.108.51
14	10.3.108.52/30	10.3.108.53 – 10.3.108.54	10.3.108.55
15	10.3.108.56/30	10.3.108.57 – 10.3.108.58	10.3.108.59
16	10.3.108.60/30	10.3.108.61 – 10.3.108.62	10.3.108.63
17	10.3.108.64/30	10.3.108.65 – 10.3.108.66	10.3.108.67
18	10.3.108.68/30	10.3.108.69 – 10.3.108.70	10.3.108.71
19	10.3.108.72/30	10.3.108.73 – 10.3.108.74	10.3.108.75
20	10.3.108.76/30	10.3.108.77 – 10.3.108.78	10.3.108.79
21	10.3.108.80/30	10.3.108.81 – 10.3.108.82	10.3.108.83
22	10.3.108.84/30	10.3.108.85 – 10.3.108.86	10.3.108.87
23	10.3.108.88/30	10.3.108.89 – 10.3.108.90	10.3.108.91
24	10.3.108.92/30	10.3.108.93 – 10.3.108.94	10.3.108.95
25	10.3.108.96/30	10.3.108.97 – 10.3.108.98	10.3.108.99
26	10.3.108.100/30	10.3.108.101 – 10.3.108.102	10.3.108.103
27	10.3.108.104/30	10.3.108.105 – 10.3.108.106	10.3.108.107
28	10.3.108.108/30	10.3.108.109 – 10.3.108.110	10.3.108.111
29	10.3.108.112/30	10.3.108.113 – 10.3.108.114	10.3.108.115
30	10.3.108.116/30	10.3.108.117 – 10.3.108.118	10.3.108.119
31	10.3.108.120/30	10.3.108.121 – 10.3.108.122	10.3.108.123
32	10.3.108.124/30	10.3.108.125 – 10.3.108.126	10.3.108.127
33	10.3.108.128/30	10.3.108.129 – 10.3.108.130	10.3.108.131
34	10.3.108.132/30	10.3.108.133 – 10.3.108.134	10.3.108.135
35	10.3.108.136/30	10.3.108.137 – 10.3.108.138	10.3.108.139
36	10.3.108.140/30	10.3.108.141 – 10.3.108.142	10.3.108.143
37	10.3.108.144/30	10.3.108.145 – 10.3.108.146	10.3.108.147
38	10.3.108.148/30	10.3.108.149 – 10.3.108.150	10.3.108.151
39	10.3.108.152/30	10.3.108.153 – 10.3.108.154	10.3.108.155
40	10.3.108.156/30	10.3.108.157 – 10.3.108.158	10.3.108.159
41	10.3.108.160/30	10.3.108.161 – 10.3.108.162	10.3.108.163
42	10.3.108.164/30	10.3.108.165 – 10.3.108.166	10.3.108.167
43	10.3.108.168/30	10.3.108.169 – 10.3.108.170	10.3.108.171
44	10.3.108.172/30	10.3.108.173 – 10.3.108.174	10.3.108.175
45	10.3.108.176/30	10.3.108.177 – 10.3.108.178	10.3.108.179
46	10.3.108.180/30	10.3.108.181 – 10.3.108.182	10.3.108.183
47	10.3.108.184/30	10.3.108.185 – 10.3.108.186	10.3.108.187
48	10.3.108.188/30	10.3.108.189 – 10.3.108.190	10.3.108.191
49	10.3.108.192/30	10.3.108.193 – 10.3.108.194	10.3.108.195
50	10.3.108.196/30	10.3.108.197 – 10.3.108.198	10.3.108.199
51	10.3.108.200/30	10.3.108.201 – 10.3.108.202	10.3.108.203
52	10.3.108.204/30	10.3.108.205 – 10.3.108.206	10.3.108.207
53	10.3.108.208/30	10.3.108.209 – 10.3.108.210	10.3.108.211
54	10.3.108.212/30	10.3.108.213 – 10.3.108.214	10.3.108.215
55	10.3.108.216/30	10.3.108.217 – 10.3.108.218	10.3.108.219
56	10.3.108.220/30	10.3.108.221 – 10.3.108.222	10.3.108.223
57	10.3.108.224/30	10.3.108.225 – 10.3.108.226	10.3.108.227
58	10.3.108.228/30	10.3.108.229 – 10.3.108.230	10.3.108.231
59	10.3.108.232/30	10.3.108.233 – 10.3.108.234	10.3.108.235
60	10.3.108.236/30	10.3.108.237 – 10.3.108.238	10.3.108.239
61	10.3.108.240/30	10.3.108.241 – 10.3.108.242	10.3.108.243
62	10.3.108.244/30	10.3.108.245 – 10.3.108.246	10.3.108.247
63	10.3.108.248/30	10.3.108.249 – 10.3.108.250	10.3.108.251
64	10.3.108.252/30	10.3.108.253 – 10.3.108.254	10.3.108.255
65	10.3.109.0/30	10.3.109.1 – 10.3.109.2	10.3.109.3
66	10.3.109.4/30	10.3.109.5 – 10.3.109.6	10.3.109.7
67	10.3.109.8/30	10.3.109.9 – 10.3.109.10	10.3.109.11
68	10.3.109.12/30	10.3.109.13 – 10.3.109.14	10.3.109.15
69	10.3.109.16/30	10.3.109.17 – 10.3.109.18	10.3.109.19
70	10.3.109.20/30	10.3.109.21 – 10.3.109.22	10.3.109.23
71	10.3.109.24/30	10.3.109.25 – 10.3.109.26	10.3.109.27
72	10.3.109.28/30	10.3.109.29 – 10.3.109.30	10.3.109.31
73	10.3.109.32/30	10.3.109.33 – 10.3.109.34	10.3.109.35
74	10.3.109.36/30	10.3.109.37 – 10.3.109.38	10.3.109.39
75	10.3.109.40/30	10.3.109.41 – 10.3.109.42	10.3.109.43
76	10.3.109.44/30	10.3.109.45 – 10.3.109.46	10.3.109.47
77	10.3.109.48/30	10.3.109.49 – 10.3.109.50	10.3.109.51
78	10.3.109.52/30	10.3.109.53 – 10.3.109.54	10.3.109.55
79	10.3.109.56/30	10.3.109.57 – 10.3.109.58	10.3.109.59
80	10.3.109.60/30	10.3.109.61 – 10.3.109.62	10.3.109.63
81	10.3.109.64/30	10.3.109.65 – 10.3.109.66	10.3.109.67
82	10.3.109.68/30	10.3.109.69 – 10.3.109.70	10.3.109.71
83	10.3.109.72/30	10.3.109.73 – 10.3.109.74	10.3.109.75
84	10.3.109.76/30	10.3.109.77 – 10.3.109.78	10.3.109.79
85	10.3.109.80/30	10.3.109.81 – 10.3.109.82	10.3.109.83
86	10.3.109.84/30	10.3.109.85 – 10.3.109.86	10.3.109.87
87	10.3.109.88/30	10.3.109.89 – 10.3.109.90	10.3.109.91
88	10.3.109.92/30	10.3.109.93 – 10.3.109.94	10.3.109.95
89	10.3.109.96/30	10.3.109.97 – 10.3.109.98	10.3.109.99
90	10.3.109.100/30	10.3.109.101 – 10.3.109.102	10.3.109.103
91	10.3.109.104/30	10.3.109.105 – 10.3.109.106	10.3.109.107
92	10.3.109.108/30	10.3.109.109 – 10.3.109.110	10.3.109.111
93	10.3.109.112/30	10.3.109.113 – 10.3.109.114	10.3.109.115
94	10.3.109.116/30	10.3.109.117 – 10.3.109.118	10.3.109.119
95	10.3.109.120/30	10.3.109.121 – 10.3.109.122	10.3.109.123
96	10.3.109.124/30	10.3.109.125 – 10.3.109.126	10.3.109.127
97	10.3.109.128/30	10.3.109.129 – 10.3.109.130	10.3.109.131
98	10.3.109.132/30	10.3.109.133 – 10.3.109.134	10.3.109.135
99	10.3.109.136/30	10.3.109.137 – 10.3.109.138	10.3.109.139
100	10.3.109.140/30	10.3.109.141 – 10.3.109.142	10.3.109.143
101	10.3.109.144/30	10.3.109.145 – 10.3.109.146	10.3.109.147
102	10.3.109.148/30	10.3.109.149 – 10.3.109.150	10.3.109.151
103	10.3.109.152/30	10.3.109.153 – 10.3.109.154	10.3.109.155
104	10.3.109.156/30	10.3.109.157 – 10.3.109.158	10.3.109.159
105	10.3.109.160/30	10.3.109.161 – 10.3.109.162	10.3.109.163
106	10.3.109.164/30	10.3.109.165 – 10.3.109.166	10.3.109.167
107	10.3.109.168/30	10.3.109.169 – 10.3.109.170	10.3.109.171
108	10.3.109.172/30	10.3.109.173 – 10.3.109.174	10.3.109.175
109	10.3.109.176/30	10.3.109.177 – 10.3.109.178	10.3.109.179
110	10.3.109.180/30	10.3.109.181 – 10.3.109.182	10.3.109.183
111	10.3.109.184/30	10.3.109.185 – 10.3.109.186	10.3.109.187
112	10.3.109.188/30	10.3.109.189 – 10.3.109.190	10.3.109.191
113	10.3.109.192/30	10.3.109.193 – 10.3.109.194	10.3.109.195
114	10.3.109.196/30	10.3.109.197 – 10.3.109.198	10.3.109.199
115	10.3.109.200/30	10.3.109.201 – 10.3.109.202	10.3.109.203
116	10.3.109.204/30	10.3.109.205 – 10.3.109.206	10.3.109.207
117	10.3.109.208/30	10.3.109.209 – 10.3.109.210	10.3.109.211
118	10.3.109.212/30	10.3.109.213 – 10.3.109.214	10.3.109.215
119	10.3.109.216/30	10.3.109.217 – 10.3.109.218	10.3.109.219
120	10.3.109.220/30	10.3.109.221 – 10.3.109.222	10.3.109.223
121	10.3.109.224/30	10.3.109.225 – 10.3.109.226	10.3.109.227
122	10.3.109.228/30	10.3.109.229 – 10.3.109.230	10.3.109.231
123	10.3.109.232/30	10.3.109.233 – 10.3.109.234	10.3.109.235
124	10.3.109.236/30	10.3.109.237 – 10.3.109.238	10.3.109.239
125	10.3.109.240/30	10.3.109.241 – 10.3.109.242	10.3.109.243
126	10.3.109.244/30	10.3.109.245 – 10.3.109.246	10.3.109.247
127	10.3.109.248/30	10.3.109.249 – 10.3.109.250	10.3.109.251
128	10.3.109.252/30	10.3.109.253 – 10.3.109.254	10.3.109.255
129	10.3.110.0/30	10.3.110.1 – 10.3.110.2	10.3.110.3
130	10.3.110.4/30	10.3.110.5 – 10.3.110.6	10.3.110.7
131	10.3.110.8/30	10.3.110.9 – 10.3.110.10	10.3.110.11
132	10.3.110.12/30	10.3.110.13 – 10.3.110.14	10.3.110.15
133	10.3.110.16/30	10.3.110.17 – 10.3.110.18	10.3.110.19
134	10.3.110.20/30	10.3.110.21 – 10.3.110.22	10.3.110.23
135	10.3.110.24/30	10.3.110.25 – 10.3.110.26	10.3.110.27
136	10.3.110.28/30	10.3.110.29 – 10.3.110.30	10.3.110.31
137	10.3.110.32/30	10.3.110.33 – 10.3.110.34	10.3.110.35
138	10.3.110.36/30	10.3.110.37 – 10.3.110.38	10.3.110.39
139	10.3.110.40/30	10.3.110.41 – 10.3.110.42	10.3.110.43
140	10.3.110.44/30	10.3.110.45 – 10.3.110.46	10.3.110.47
141	10.3.110.48/30	10.3.110.49 – 10.3.110.50	10.3.110.51
142	10.3.110.52/30	10.3.110.53 – 10.3.110.54	10.3.110.55
143	10.3.110.56/30	10.3.110.57 – 10.3.110.58	10.3.110.59
144	10.3.110.60/30	10.3.110.61 – 10.3.110.62	10.3.110.63
145	10.3.110.64/30	10.3.110.65 – 10.3.110.66	10.3.110.67
146	10.3.110.68/30	10.3.110.69 – 10.3.110.70	10.3.110.71
147	10.3.110.72/30	10.3.110.73 – 10.3.110.74	10.3.110.75
148	10.3.110.76/30	10.3.110.77 – 10.3.110.78	10.3.110.79
149	10.3.110.80/30	10.3.110.81 – 10.3.110.82	10.3.110.83
150	10.3.110.84/30	10.3.110.85 – 10.3.110.86	10.3.110.87
151	10.3.110.88/30	10.3.110.89 – 10.3.110.90	10.3.110.91
152	10.3.110.92/30	10.3.110.93 – 10.3.110.94	10.3.110.95
153	10.3.110.96/30	10.3.110.97 – 10.3.110.98	10.3.110.99
154	10.3.110.100/30	10.3.110.101 – 10.3.110.102	10.3.110.103
155	10.3.110.104/30	10.3.110.105 – 10.3.110.106	10.3.110.107
156	10.3.110.108/30	10.3.110.109 – 10.3.110.110	10.3.110.111
157	10.3.110.112/30	10.3.110.113 – 10.3.110.114	10.3.110.115
158	10.3.110.116/30	10.3.110.117 – 10.3.110.118	10.3.110.119
159	10.3.110.120/30	10.3.110.121 – 10.3.110.122	10.3.110.123
160	10.3.110.124/30	10.3.110.125 – 10.3.110.126	10.3.110.127
161	10.3.110.128/30	10.3.110.129 – 10.3.110.130	10.3.110.131
162	10.3.110.132/30	10.3.110.133 – 10.3.110.134	10.3.110.135
163	10.3.110.136/30	10.3.110.137 – 10.3.110.138	10.3.110.139
164	10.3.110.140/30	10.3.110.141 – 10.3.110.142	10.3.110.143
165	10.3.110.144/30	10.3.110.145 – 10.3.110.146	10.3.110.147
166	10.3.110.148/30	10.3.110.149 – 10.3.110.150	10.3.110.151
167	10.3.110.152/30	10.3.110.153 – 10.3.110.154	10.3.110.155
168	10.3.110.156/30	10.3.110.157 – 10.3.110.158	10.3.110.159
169	10.3.110.160/30	10.3.110.161 – 10.3.110.162	10.3.110.163
170	10.3.110.164/30	10.3.110.165 – 10.3.110.166	10.3.110.167
171	10.3.110.168/30	10.3.110.169 – 10.3.110.170	10.3.110.171
172	10.3.110.172/30	10.3.110.173 – 10.3.110.174	10.3.110.175
173	10.3.110.176/30	10.3.110.177 – 10.3.110.178	10.3.110.179
174	10.3.110.180/30	10.3.110.181 – 10.3.110.182	10.3.110.183
175	10.3.110.184/30	10.3.110.185 – 10.3.110.186	10.3.110.187
176	10.3.110.188/30	10.3.110.189 – 10.3.110.190	10.3.110.191
177	10.3.110.192/30	10.3.110.193 – 10.3.110.194	10.3.110.195
178	10.3.110.196/30	10.3.110.197 – 10.3.110.198	10.3.110.199
179	10.3.110.200/30	10.3.110.201 – 10.3.110.202	10.3.110.203
180	10.3.110.204/30	10.3.110.205 – 10.3.110.206	10.3.110.207
181	10.3.110.208/30	10.3.110.209 – 10.3.110.210	10.3.110.211
182	10.3.110.212/30	10.3.110.213 – 10.3.110.214	10.3.110.215
183	10.3.110.216/30	10.3.110.217 – 10.3.110.218	10.3.110.219
184	10.3.110.220/30	10.3.110.221 – 10.3.110.222	10.3.110.223
185	10.3.110.224/30	10.3.110.225 – 10.3.110.226	10.3.110.227
186	10.3.110.228/30	10.3.110.229 – 10.3.110.230	10.3.110.231
187	10.3.110.232/30	10.3.110.233 – 10.3.110.234	10.3.110.235
188	10.3.110.236/30	10.3.110.237 – 10.3.110.238	10.3.110.239
189	10.3.110.240/30	10.3.110.241 – 10.3.110.242	10.3.110.243
190	10.3.110.244/30	10.3.110.245 – 10.3.110.246	10.3.110.247
191	10.3.110.248/30	10.3.110.249 – 10.3.110.250	10.3.110.251
192	10.3.110.252/30	10.3.110.253 – 10.3.110.254	10.3.110.255
193	10.3.111.0/30	10.3.111.1 – 10.3.111.2	10.3.111.3
194	10.3.111.4/30	10.3.111.5 – 10.3.111.6	10.3.111.7
195	10.3.111.8/30	10.3.111.9 – 10.3.111.10	10.3.111.11
196	10.3.111.12/30	10.3.111.13 – 10.3.111.14	10.3.111.15
197	10.3.111.16/30	10.3.111.17 – 10.3.111.18	10.3.111.19
198	10.3.111.20/30	10.3.111.21 – 10.3.111.22	10.3.111.23
199	10.3.111.24/30	10.3.111.25 – 10.3.111.26	10.3.111.27
200	10.3.111.28/30	10.3.111.29 – 10.3.111.30	10.3.111.31
201	10.3.111.32/30	10.3.111.33 – 10.3.111.34	10.3.111.35
202	10.3.111.36/30	10.3.111.37 – 10.3.111.38	10.3.111.39
203	10.3.111.40/30	10.3.111.41 – 10.3.111.42	10.3.111.43
204	10.3.111.44/30	10.3.111.45 – 10.3.111.46	10.3.111.47
205	10.3.111.48/30	10.3.111.49 – 10.3.111.50	10.3.111.51
206	10.3.111.52/30	10.3.111.53 – 10.3.111.54	10.3.111.55
207	10.3.111.56/30	10.3.111.57 – 10.3.111.58	10.3.111.59
208	10.3.111.60/30	10.3.111.61 – 10.3.111.62	10.3.111.63
209	10.3.111.64/30	10.3.111.65 – 10.3.111.66	10.3.111.67
210	10.3.111.68/30	10.3.111.69 – 10.3.111.70	10.3.111.71
211	10.3.111.72/30	10.3.111.73 – 10.3.111.74	10.3.111.75
212	10.3.111.76/30	10.3.111.77 – 10.3.111.78	10.3.111.79
213	10.3.111.80/30	10.3.111.81 – 10.3.111.82	10.3.111.83
214	10.3.111.84/30	10.3.111.85 – 10.3.111.86	10.3.111.87
215	10.3.111.88/30	10.3.111.89 – 10.3.111.90	10.3.111.91
216	10.3.111.92/30	10.3.111.93 – 10.3.111.94	10.3.111.95
217	10.3.111.96/30	10.3.111.97 – 10.3.111.98	10.3.111.99
218	10.3.111.100/30	10.3.111.101 – 10.3.111.102	10.3.111.103
219	10.3.111.104/30	10.3.111.105 – 10.3.111.106	10.3.111.107
220	10.3.111.108/30	10.3.111.109 – 10.3.111.110	10.3.111.111
221	10.3.111.112/30	10.3.111.113 – 10.3.111.114	10.3.111.115
222	10.3.111.116/30	10.3.111.117 – 10.3.111.118	10.3.111.119
223	10.3.111.120/30	10.3.111.121 – 10.3.111.122	10.3.111.123
224	10.3.111.124/30	10.3.111.125 – 10.3.111.126	10.3.111.127
225	10.3.111.128/30	10.3.111.129 – 10.3.111.130	10.3.111.131
226	10.3.111.132/30	10.3.111.133 – 10.3.111.134	10.3.111.135
227	10.3.111.136/30	10.3.111.137 – 10.3.111.138	10.3.111.139
228	10.3.111.140/30	10.3.111.141 – 10.3.111.142	10.3.111.143
229	10.3.111.144/30	10.3.111.145 – 10.3.111.146	10.3.111.147
230	10.3.111.148/30	10.3.111.149 – 10.3.111.150	10.3.111.151
231	10.3.111.152/30	10.3.111.153 – 10.3.111.154	10.3.111.155
232	10.3.111.156/30	10.3.111.157 – 10.3.111.158	10.3.111.159
233	10.3.111.160/30	10.3.111.161 – 10.3.111.162	10.3.111.163
234	10.3.111.164/30	10.3.111.165 – 10.3.111.166	10.3.111.167
235	10.3.111.168/30	10.3.111.169 – 10.3.111.170	10.3.111.171
236	10.3.111.172/30	10.3.111.173 – 10.3.111.174	10.3.111.175
237	10.3.111.176/30	10.3.111.177 – 10.3.111.178	10.3.111.179
238	10.3.111.180/30	10.3.111.181 – 10.3.111.182	10.3.111.183
239	10.3.111.184/30	10.3.111.185 – 10.3.111.186	10.3.111.187
240	10.3.111.188/30	10.3.111.189 – 10.3.111.190	10.3.111.191
241	10.3.111.192/30	10.3.111.193 – 10.3.111.194	10.3.111.195
242	10.3.111.196/30	10.3.111.197 – 10.3.111.198	10.3.111.199
243	10.3.111.200/30	10.3.111.201 – 10.3.111.202	10.3.111.203
244	10.3.111.204/30	10.3.111.205 – 10.3.111.206	10.3.111.207
245	10.3.111.208/30	10.3.111.209 – 10.3.111.210	10.3.111.211
246	10.3.111.212/30	10.3.111.213 – 10.3.111.214	10.3.111.215
247	10.3.111.216/30	10.3.111.217 – 10.3.111.218	10.3.111.219
248	10.3.111.220/30	10.3.111.221 – 10.3.111.222	10.3.111.223
249	10.3.111.224/30	10.3.111.225 – 10.3.111.226	10.3.111.227
250	10.3.111.228/30	10.3.111.229 – 10.3.111.230	10.3.111.231
251	10.3.111.232/30	10.3.111.233 – 10.3.111.234	10.3.111.235
252	10.3.111.236/30	10.3.111.237 – 10.3.111.238	10.3.111.239
253	10.3.111.240/30	10.3.111.241 – 10.3.111.242	10.3.111.243
254	10.3.111.244/30	10.3.111.245 – 10.3.111.246	10.3.111.247
255	10.3.111.248/30	10.3.111.249 – 10.3.111.250	10.3.111.251
256	10.3.111.252/30	10.3.111.253 – 10.3.111.254	10.3.111.255

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 →