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)10.3.140.0/22

network10.3.140.0/22

broadcast10.3.143.255

first host10.3.140.1

last host10.3.143.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.140.0/22

address00001010.00000011.10001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10001100.00000000

broadcast00001010.00000011.10001111.11111111

green = network part, grey = host part

hex0x0a038c00

decimal168004608

reverse dns0.140.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:8c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.140.0/30	10.3.140.1 – 10.3.140.2	10.3.140.3
2	10.3.140.4/30	10.3.140.5 – 10.3.140.6	10.3.140.7
3	10.3.140.8/30	10.3.140.9 – 10.3.140.10	10.3.140.11
4	10.3.140.12/30	10.3.140.13 – 10.3.140.14	10.3.140.15
5	10.3.140.16/30	10.3.140.17 – 10.3.140.18	10.3.140.19
6	10.3.140.20/30	10.3.140.21 – 10.3.140.22	10.3.140.23
7	10.3.140.24/30	10.3.140.25 – 10.3.140.26	10.3.140.27
8	10.3.140.28/30	10.3.140.29 – 10.3.140.30	10.3.140.31
9	10.3.140.32/30	10.3.140.33 – 10.3.140.34	10.3.140.35
10	10.3.140.36/30	10.3.140.37 – 10.3.140.38	10.3.140.39
11	10.3.140.40/30	10.3.140.41 – 10.3.140.42	10.3.140.43
12	10.3.140.44/30	10.3.140.45 – 10.3.140.46	10.3.140.47
13	10.3.140.48/30	10.3.140.49 – 10.3.140.50	10.3.140.51
14	10.3.140.52/30	10.3.140.53 – 10.3.140.54	10.3.140.55
15	10.3.140.56/30	10.3.140.57 – 10.3.140.58	10.3.140.59
16	10.3.140.60/30	10.3.140.61 – 10.3.140.62	10.3.140.63
17	10.3.140.64/30	10.3.140.65 – 10.3.140.66	10.3.140.67
18	10.3.140.68/30	10.3.140.69 – 10.3.140.70	10.3.140.71
19	10.3.140.72/30	10.3.140.73 – 10.3.140.74	10.3.140.75
20	10.3.140.76/30	10.3.140.77 – 10.3.140.78	10.3.140.79
21	10.3.140.80/30	10.3.140.81 – 10.3.140.82	10.3.140.83
22	10.3.140.84/30	10.3.140.85 – 10.3.140.86	10.3.140.87
23	10.3.140.88/30	10.3.140.89 – 10.3.140.90	10.3.140.91
24	10.3.140.92/30	10.3.140.93 – 10.3.140.94	10.3.140.95
25	10.3.140.96/30	10.3.140.97 – 10.3.140.98	10.3.140.99
26	10.3.140.100/30	10.3.140.101 – 10.3.140.102	10.3.140.103
27	10.3.140.104/30	10.3.140.105 – 10.3.140.106	10.3.140.107
28	10.3.140.108/30	10.3.140.109 – 10.3.140.110	10.3.140.111
29	10.3.140.112/30	10.3.140.113 – 10.3.140.114	10.3.140.115
30	10.3.140.116/30	10.3.140.117 – 10.3.140.118	10.3.140.119
31	10.3.140.120/30	10.3.140.121 – 10.3.140.122	10.3.140.123
32	10.3.140.124/30	10.3.140.125 – 10.3.140.126	10.3.140.127
33	10.3.140.128/30	10.3.140.129 – 10.3.140.130	10.3.140.131
34	10.3.140.132/30	10.3.140.133 – 10.3.140.134	10.3.140.135
35	10.3.140.136/30	10.3.140.137 – 10.3.140.138	10.3.140.139
36	10.3.140.140/30	10.3.140.141 – 10.3.140.142	10.3.140.143
37	10.3.140.144/30	10.3.140.145 – 10.3.140.146	10.3.140.147
38	10.3.140.148/30	10.3.140.149 – 10.3.140.150	10.3.140.151
39	10.3.140.152/30	10.3.140.153 – 10.3.140.154	10.3.140.155
40	10.3.140.156/30	10.3.140.157 – 10.3.140.158	10.3.140.159
41	10.3.140.160/30	10.3.140.161 – 10.3.140.162	10.3.140.163
42	10.3.140.164/30	10.3.140.165 – 10.3.140.166	10.3.140.167
43	10.3.140.168/30	10.3.140.169 – 10.3.140.170	10.3.140.171
44	10.3.140.172/30	10.3.140.173 – 10.3.140.174	10.3.140.175
45	10.3.140.176/30	10.3.140.177 – 10.3.140.178	10.3.140.179
46	10.3.140.180/30	10.3.140.181 – 10.3.140.182	10.3.140.183
47	10.3.140.184/30	10.3.140.185 – 10.3.140.186	10.3.140.187
48	10.3.140.188/30	10.3.140.189 – 10.3.140.190	10.3.140.191
49	10.3.140.192/30	10.3.140.193 – 10.3.140.194	10.3.140.195
50	10.3.140.196/30	10.3.140.197 – 10.3.140.198	10.3.140.199
51	10.3.140.200/30	10.3.140.201 – 10.3.140.202	10.3.140.203
52	10.3.140.204/30	10.3.140.205 – 10.3.140.206	10.3.140.207
53	10.3.140.208/30	10.3.140.209 – 10.3.140.210	10.3.140.211
54	10.3.140.212/30	10.3.140.213 – 10.3.140.214	10.3.140.215
55	10.3.140.216/30	10.3.140.217 – 10.3.140.218	10.3.140.219
56	10.3.140.220/30	10.3.140.221 – 10.3.140.222	10.3.140.223
57	10.3.140.224/30	10.3.140.225 – 10.3.140.226	10.3.140.227
58	10.3.140.228/30	10.3.140.229 – 10.3.140.230	10.3.140.231
59	10.3.140.232/30	10.3.140.233 – 10.3.140.234	10.3.140.235
60	10.3.140.236/30	10.3.140.237 – 10.3.140.238	10.3.140.239
61	10.3.140.240/30	10.3.140.241 – 10.3.140.242	10.3.140.243
62	10.3.140.244/30	10.3.140.245 – 10.3.140.246	10.3.140.247
63	10.3.140.248/30	10.3.140.249 – 10.3.140.250	10.3.140.251
64	10.3.140.252/30	10.3.140.253 – 10.3.140.254	10.3.140.255
65	10.3.141.0/30	10.3.141.1 – 10.3.141.2	10.3.141.3
66	10.3.141.4/30	10.3.141.5 – 10.3.141.6	10.3.141.7
67	10.3.141.8/30	10.3.141.9 – 10.3.141.10	10.3.141.11
68	10.3.141.12/30	10.3.141.13 – 10.3.141.14	10.3.141.15
69	10.3.141.16/30	10.3.141.17 – 10.3.141.18	10.3.141.19
70	10.3.141.20/30	10.3.141.21 – 10.3.141.22	10.3.141.23
71	10.3.141.24/30	10.3.141.25 – 10.3.141.26	10.3.141.27
72	10.3.141.28/30	10.3.141.29 – 10.3.141.30	10.3.141.31
73	10.3.141.32/30	10.3.141.33 – 10.3.141.34	10.3.141.35
74	10.3.141.36/30	10.3.141.37 – 10.3.141.38	10.3.141.39
75	10.3.141.40/30	10.3.141.41 – 10.3.141.42	10.3.141.43
76	10.3.141.44/30	10.3.141.45 – 10.3.141.46	10.3.141.47
77	10.3.141.48/30	10.3.141.49 – 10.3.141.50	10.3.141.51
78	10.3.141.52/30	10.3.141.53 – 10.3.141.54	10.3.141.55
79	10.3.141.56/30	10.3.141.57 – 10.3.141.58	10.3.141.59
80	10.3.141.60/30	10.3.141.61 – 10.3.141.62	10.3.141.63
81	10.3.141.64/30	10.3.141.65 – 10.3.141.66	10.3.141.67
82	10.3.141.68/30	10.3.141.69 – 10.3.141.70	10.3.141.71
83	10.3.141.72/30	10.3.141.73 – 10.3.141.74	10.3.141.75
84	10.3.141.76/30	10.3.141.77 – 10.3.141.78	10.3.141.79
85	10.3.141.80/30	10.3.141.81 – 10.3.141.82	10.3.141.83
86	10.3.141.84/30	10.3.141.85 – 10.3.141.86	10.3.141.87
87	10.3.141.88/30	10.3.141.89 – 10.3.141.90	10.3.141.91
88	10.3.141.92/30	10.3.141.93 – 10.3.141.94	10.3.141.95
89	10.3.141.96/30	10.3.141.97 – 10.3.141.98	10.3.141.99
90	10.3.141.100/30	10.3.141.101 – 10.3.141.102	10.3.141.103
91	10.3.141.104/30	10.3.141.105 – 10.3.141.106	10.3.141.107
92	10.3.141.108/30	10.3.141.109 – 10.3.141.110	10.3.141.111
93	10.3.141.112/30	10.3.141.113 – 10.3.141.114	10.3.141.115
94	10.3.141.116/30	10.3.141.117 – 10.3.141.118	10.3.141.119
95	10.3.141.120/30	10.3.141.121 – 10.3.141.122	10.3.141.123
96	10.3.141.124/30	10.3.141.125 – 10.3.141.126	10.3.141.127
97	10.3.141.128/30	10.3.141.129 – 10.3.141.130	10.3.141.131
98	10.3.141.132/30	10.3.141.133 – 10.3.141.134	10.3.141.135
99	10.3.141.136/30	10.3.141.137 – 10.3.141.138	10.3.141.139
100	10.3.141.140/30	10.3.141.141 – 10.3.141.142	10.3.141.143
101	10.3.141.144/30	10.3.141.145 – 10.3.141.146	10.3.141.147
102	10.3.141.148/30	10.3.141.149 – 10.3.141.150	10.3.141.151
103	10.3.141.152/30	10.3.141.153 – 10.3.141.154	10.3.141.155
104	10.3.141.156/30	10.3.141.157 – 10.3.141.158	10.3.141.159
105	10.3.141.160/30	10.3.141.161 – 10.3.141.162	10.3.141.163
106	10.3.141.164/30	10.3.141.165 – 10.3.141.166	10.3.141.167
107	10.3.141.168/30	10.3.141.169 – 10.3.141.170	10.3.141.171
108	10.3.141.172/30	10.3.141.173 – 10.3.141.174	10.3.141.175
109	10.3.141.176/30	10.3.141.177 – 10.3.141.178	10.3.141.179
110	10.3.141.180/30	10.3.141.181 – 10.3.141.182	10.3.141.183
111	10.3.141.184/30	10.3.141.185 – 10.3.141.186	10.3.141.187
112	10.3.141.188/30	10.3.141.189 – 10.3.141.190	10.3.141.191
113	10.3.141.192/30	10.3.141.193 – 10.3.141.194	10.3.141.195
114	10.3.141.196/30	10.3.141.197 – 10.3.141.198	10.3.141.199
115	10.3.141.200/30	10.3.141.201 – 10.3.141.202	10.3.141.203
116	10.3.141.204/30	10.3.141.205 – 10.3.141.206	10.3.141.207
117	10.3.141.208/30	10.3.141.209 – 10.3.141.210	10.3.141.211
118	10.3.141.212/30	10.3.141.213 – 10.3.141.214	10.3.141.215
119	10.3.141.216/30	10.3.141.217 – 10.3.141.218	10.3.141.219
120	10.3.141.220/30	10.3.141.221 – 10.3.141.222	10.3.141.223
121	10.3.141.224/30	10.3.141.225 – 10.3.141.226	10.3.141.227
122	10.3.141.228/30	10.3.141.229 – 10.3.141.230	10.3.141.231
123	10.3.141.232/30	10.3.141.233 – 10.3.141.234	10.3.141.235
124	10.3.141.236/30	10.3.141.237 – 10.3.141.238	10.3.141.239
125	10.3.141.240/30	10.3.141.241 – 10.3.141.242	10.3.141.243
126	10.3.141.244/30	10.3.141.245 – 10.3.141.246	10.3.141.247
127	10.3.141.248/30	10.3.141.249 – 10.3.141.250	10.3.141.251
128	10.3.141.252/30	10.3.141.253 – 10.3.141.254	10.3.141.255
129	10.3.142.0/30	10.3.142.1 – 10.3.142.2	10.3.142.3
130	10.3.142.4/30	10.3.142.5 – 10.3.142.6	10.3.142.7
131	10.3.142.8/30	10.3.142.9 – 10.3.142.10	10.3.142.11
132	10.3.142.12/30	10.3.142.13 – 10.3.142.14	10.3.142.15
133	10.3.142.16/30	10.3.142.17 – 10.3.142.18	10.3.142.19
134	10.3.142.20/30	10.3.142.21 – 10.3.142.22	10.3.142.23
135	10.3.142.24/30	10.3.142.25 – 10.3.142.26	10.3.142.27
136	10.3.142.28/30	10.3.142.29 – 10.3.142.30	10.3.142.31
137	10.3.142.32/30	10.3.142.33 – 10.3.142.34	10.3.142.35
138	10.3.142.36/30	10.3.142.37 – 10.3.142.38	10.3.142.39
139	10.3.142.40/30	10.3.142.41 – 10.3.142.42	10.3.142.43
140	10.3.142.44/30	10.3.142.45 – 10.3.142.46	10.3.142.47
141	10.3.142.48/30	10.3.142.49 – 10.3.142.50	10.3.142.51
142	10.3.142.52/30	10.3.142.53 – 10.3.142.54	10.3.142.55
143	10.3.142.56/30	10.3.142.57 – 10.3.142.58	10.3.142.59
144	10.3.142.60/30	10.3.142.61 – 10.3.142.62	10.3.142.63
145	10.3.142.64/30	10.3.142.65 – 10.3.142.66	10.3.142.67
146	10.3.142.68/30	10.3.142.69 – 10.3.142.70	10.3.142.71
147	10.3.142.72/30	10.3.142.73 – 10.3.142.74	10.3.142.75
148	10.3.142.76/30	10.3.142.77 – 10.3.142.78	10.3.142.79
149	10.3.142.80/30	10.3.142.81 – 10.3.142.82	10.3.142.83
150	10.3.142.84/30	10.3.142.85 – 10.3.142.86	10.3.142.87
151	10.3.142.88/30	10.3.142.89 – 10.3.142.90	10.3.142.91
152	10.3.142.92/30	10.3.142.93 – 10.3.142.94	10.3.142.95
153	10.3.142.96/30	10.3.142.97 – 10.3.142.98	10.3.142.99
154	10.3.142.100/30	10.3.142.101 – 10.3.142.102	10.3.142.103
155	10.3.142.104/30	10.3.142.105 – 10.3.142.106	10.3.142.107
156	10.3.142.108/30	10.3.142.109 – 10.3.142.110	10.3.142.111
157	10.3.142.112/30	10.3.142.113 – 10.3.142.114	10.3.142.115
158	10.3.142.116/30	10.3.142.117 – 10.3.142.118	10.3.142.119
159	10.3.142.120/30	10.3.142.121 – 10.3.142.122	10.3.142.123
160	10.3.142.124/30	10.3.142.125 – 10.3.142.126	10.3.142.127
161	10.3.142.128/30	10.3.142.129 – 10.3.142.130	10.3.142.131
162	10.3.142.132/30	10.3.142.133 – 10.3.142.134	10.3.142.135
163	10.3.142.136/30	10.3.142.137 – 10.3.142.138	10.3.142.139
164	10.3.142.140/30	10.3.142.141 – 10.3.142.142	10.3.142.143
165	10.3.142.144/30	10.3.142.145 – 10.3.142.146	10.3.142.147
166	10.3.142.148/30	10.3.142.149 – 10.3.142.150	10.3.142.151
167	10.3.142.152/30	10.3.142.153 – 10.3.142.154	10.3.142.155
168	10.3.142.156/30	10.3.142.157 – 10.3.142.158	10.3.142.159
169	10.3.142.160/30	10.3.142.161 – 10.3.142.162	10.3.142.163
170	10.3.142.164/30	10.3.142.165 – 10.3.142.166	10.3.142.167
171	10.3.142.168/30	10.3.142.169 – 10.3.142.170	10.3.142.171
172	10.3.142.172/30	10.3.142.173 – 10.3.142.174	10.3.142.175
173	10.3.142.176/30	10.3.142.177 – 10.3.142.178	10.3.142.179
174	10.3.142.180/30	10.3.142.181 – 10.3.142.182	10.3.142.183
175	10.3.142.184/30	10.3.142.185 – 10.3.142.186	10.3.142.187
176	10.3.142.188/30	10.3.142.189 – 10.3.142.190	10.3.142.191
177	10.3.142.192/30	10.3.142.193 – 10.3.142.194	10.3.142.195
178	10.3.142.196/30	10.3.142.197 – 10.3.142.198	10.3.142.199
179	10.3.142.200/30	10.3.142.201 – 10.3.142.202	10.3.142.203
180	10.3.142.204/30	10.3.142.205 – 10.3.142.206	10.3.142.207
181	10.3.142.208/30	10.3.142.209 – 10.3.142.210	10.3.142.211
182	10.3.142.212/30	10.3.142.213 – 10.3.142.214	10.3.142.215
183	10.3.142.216/30	10.3.142.217 – 10.3.142.218	10.3.142.219
184	10.3.142.220/30	10.3.142.221 – 10.3.142.222	10.3.142.223
185	10.3.142.224/30	10.3.142.225 – 10.3.142.226	10.3.142.227
186	10.3.142.228/30	10.3.142.229 – 10.3.142.230	10.3.142.231
187	10.3.142.232/30	10.3.142.233 – 10.3.142.234	10.3.142.235
188	10.3.142.236/30	10.3.142.237 – 10.3.142.238	10.3.142.239
189	10.3.142.240/30	10.3.142.241 – 10.3.142.242	10.3.142.243
190	10.3.142.244/30	10.3.142.245 – 10.3.142.246	10.3.142.247
191	10.3.142.248/30	10.3.142.249 – 10.3.142.250	10.3.142.251
192	10.3.142.252/30	10.3.142.253 – 10.3.142.254	10.3.142.255
193	10.3.143.0/30	10.3.143.1 – 10.3.143.2	10.3.143.3
194	10.3.143.4/30	10.3.143.5 – 10.3.143.6	10.3.143.7
195	10.3.143.8/30	10.3.143.9 – 10.3.143.10	10.3.143.11
196	10.3.143.12/30	10.3.143.13 – 10.3.143.14	10.3.143.15
197	10.3.143.16/30	10.3.143.17 – 10.3.143.18	10.3.143.19
198	10.3.143.20/30	10.3.143.21 – 10.3.143.22	10.3.143.23
199	10.3.143.24/30	10.3.143.25 – 10.3.143.26	10.3.143.27
200	10.3.143.28/30	10.3.143.29 – 10.3.143.30	10.3.143.31
201	10.3.143.32/30	10.3.143.33 – 10.3.143.34	10.3.143.35
202	10.3.143.36/30	10.3.143.37 – 10.3.143.38	10.3.143.39
203	10.3.143.40/30	10.3.143.41 – 10.3.143.42	10.3.143.43
204	10.3.143.44/30	10.3.143.45 – 10.3.143.46	10.3.143.47
205	10.3.143.48/30	10.3.143.49 – 10.3.143.50	10.3.143.51
206	10.3.143.52/30	10.3.143.53 – 10.3.143.54	10.3.143.55
207	10.3.143.56/30	10.3.143.57 – 10.3.143.58	10.3.143.59
208	10.3.143.60/30	10.3.143.61 – 10.3.143.62	10.3.143.63
209	10.3.143.64/30	10.3.143.65 – 10.3.143.66	10.3.143.67
210	10.3.143.68/30	10.3.143.69 – 10.3.143.70	10.3.143.71
211	10.3.143.72/30	10.3.143.73 – 10.3.143.74	10.3.143.75
212	10.3.143.76/30	10.3.143.77 – 10.3.143.78	10.3.143.79
213	10.3.143.80/30	10.3.143.81 – 10.3.143.82	10.3.143.83
214	10.3.143.84/30	10.3.143.85 – 10.3.143.86	10.3.143.87
215	10.3.143.88/30	10.3.143.89 – 10.3.143.90	10.3.143.91
216	10.3.143.92/30	10.3.143.93 – 10.3.143.94	10.3.143.95
217	10.3.143.96/30	10.3.143.97 – 10.3.143.98	10.3.143.99
218	10.3.143.100/30	10.3.143.101 – 10.3.143.102	10.3.143.103
219	10.3.143.104/30	10.3.143.105 – 10.3.143.106	10.3.143.107
220	10.3.143.108/30	10.3.143.109 – 10.3.143.110	10.3.143.111
221	10.3.143.112/30	10.3.143.113 – 10.3.143.114	10.3.143.115
222	10.3.143.116/30	10.3.143.117 – 10.3.143.118	10.3.143.119
223	10.3.143.120/30	10.3.143.121 – 10.3.143.122	10.3.143.123
224	10.3.143.124/30	10.3.143.125 – 10.3.143.126	10.3.143.127
225	10.3.143.128/30	10.3.143.129 – 10.3.143.130	10.3.143.131
226	10.3.143.132/30	10.3.143.133 – 10.3.143.134	10.3.143.135
227	10.3.143.136/30	10.3.143.137 – 10.3.143.138	10.3.143.139
228	10.3.143.140/30	10.3.143.141 – 10.3.143.142	10.3.143.143
229	10.3.143.144/30	10.3.143.145 – 10.3.143.146	10.3.143.147
230	10.3.143.148/30	10.3.143.149 – 10.3.143.150	10.3.143.151
231	10.3.143.152/30	10.3.143.153 – 10.3.143.154	10.3.143.155
232	10.3.143.156/30	10.3.143.157 – 10.3.143.158	10.3.143.159
233	10.3.143.160/30	10.3.143.161 – 10.3.143.162	10.3.143.163
234	10.3.143.164/30	10.3.143.165 – 10.3.143.166	10.3.143.167
235	10.3.143.168/30	10.3.143.169 – 10.3.143.170	10.3.143.171
236	10.3.143.172/30	10.3.143.173 – 10.3.143.174	10.3.143.175
237	10.3.143.176/30	10.3.143.177 – 10.3.143.178	10.3.143.179
238	10.3.143.180/30	10.3.143.181 – 10.3.143.182	10.3.143.183
239	10.3.143.184/30	10.3.143.185 – 10.3.143.186	10.3.143.187
240	10.3.143.188/30	10.3.143.189 – 10.3.143.190	10.3.143.191
241	10.3.143.192/30	10.3.143.193 – 10.3.143.194	10.3.143.195
242	10.3.143.196/30	10.3.143.197 – 10.3.143.198	10.3.143.199
243	10.3.143.200/30	10.3.143.201 – 10.3.143.202	10.3.143.203
244	10.3.143.204/30	10.3.143.205 – 10.3.143.206	10.3.143.207
245	10.3.143.208/30	10.3.143.209 – 10.3.143.210	10.3.143.211
246	10.3.143.212/30	10.3.143.213 – 10.3.143.214	10.3.143.215
247	10.3.143.216/30	10.3.143.217 – 10.3.143.218	10.3.143.219
248	10.3.143.220/30	10.3.143.221 – 10.3.143.222	10.3.143.223
249	10.3.143.224/30	10.3.143.225 – 10.3.143.226	10.3.143.227
250	10.3.143.228/30	10.3.143.229 – 10.3.143.230	10.3.143.231
251	10.3.143.232/30	10.3.143.233 – 10.3.143.234	10.3.143.235
252	10.3.143.236/30	10.3.143.237 – 10.3.143.238	10.3.143.239
253	10.3.143.240/30	10.3.143.241 – 10.3.143.242	10.3.143.243
254	10.3.143.244/30	10.3.143.245 – 10.3.143.246	10.3.143.247
255	10.3.143.248/30	10.3.143.249 – 10.3.143.250	10.3.143.251
256	10.3.143.252/30	10.3.143.253 – 10.3.143.254	10.3.143.255

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 →