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)10.2.212.0/22

network10.2.212.0/22

broadcast10.2.215.255

first host10.2.212.1

last host10.2.215.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.212.0/22

address00001010.00000010.11010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.11010100.00000000

broadcast00001010.00000010.11010111.11111111

green = network part, grey = host part

hex0x0a02d400

decimal167957504

reverse dns0.212.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:d400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.212.0/30	10.2.212.1 – 10.2.212.2	10.2.212.3
2	10.2.212.4/30	10.2.212.5 – 10.2.212.6	10.2.212.7
3	10.2.212.8/30	10.2.212.9 – 10.2.212.10	10.2.212.11
4	10.2.212.12/30	10.2.212.13 – 10.2.212.14	10.2.212.15
5	10.2.212.16/30	10.2.212.17 – 10.2.212.18	10.2.212.19
6	10.2.212.20/30	10.2.212.21 – 10.2.212.22	10.2.212.23
7	10.2.212.24/30	10.2.212.25 – 10.2.212.26	10.2.212.27
8	10.2.212.28/30	10.2.212.29 – 10.2.212.30	10.2.212.31
9	10.2.212.32/30	10.2.212.33 – 10.2.212.34	10.2.212.35
10	10.2.212.36/30	10.2.212.37 – 10.2.212.38	10.2.212.39
11	10.2.212.40/30	10.2.212.41 – 10.2.212.42	10.2.212.43
12	10.2.212.44/30	10.2.212.45 – 10.2.212.46	10.2.212.47
13	10.2.212.48/30	10.2.212.49 – 10.2.212.50	10.2.212.51
14	10.2.212.52/30	10.2.212.53 – 10.2.212.54	10.2.212.55
15	10.2.212.56/30	10.2.212.57 – 10.2.212.58	10.2.212.59
16	10.2.212.60/30	10.2.212.61 – 10.2.212.62	10.2.212.63
17	10.2.212.64/30	10.2.212.65 – 10.2.212.66	10.2.212.67
18	10.2.212.68/30	10.2.212.69 – 10.2.212.70	10.2.212.71
19	10.2.212.72/30	10.2.212.73 – 10.2.212.74	10.2.212.75
20	10.2.212.76/30	10.2.212.77 – 10.2.212.78	10.2.212.79
21	10.2.212.80/30	10.2.212.81 – 10.2.212.82	10.2.212.83
22	10.2.212.84/30	10.2.212.85 – 10.2.212.86	10.2.212.87
23	10.2.212.88/30	10.2.212.89 – 10.2.212.90	10.2.212.91
24	10.2.212.92/30	10.2.212.93 – 10.2.212.94	10.2.212.95
25	10.2.212.96/30	10.2.212.97 – 10.2.212.98	10.2.212.99
26	10.2.212.100/30	10.2.212.101 – 10.2.212.102	10.2.212.103
27	10.2.212.104/30	10.2.212.105 – 10.2.212.106	10.2.212.107
28	10.2.212.108/30	10.2.212.109 – 10.2.212.110	10.2.212.111
29	10.2.212.112/30	10.2.212.113 – 10.2.212.114	10.2.212.115
30	10.2.212.116/30	10.2.212.117 – 10.2.212.118	10.2.212.119
31	10.2.212.120/30	10.2.212.121 – 10.2.212.122	10.2.212.123
32	10.2.212.124/30	10.2.212.125 – 10.2.212.126	10.2.212.127
33	10.2.212.128/30	10.2.212.129 – 10.2.212.130	10.2.212.131
34	10.2.212.132/30	10.2.212.133 – 10.2.212.134	10.2.212.135
35	10.2.212.136/30	10.2.212.137 – 10.2.212.138	10.2.212.139
36	10.2.212.140/30	10.2.212.141 – 10.2.212.142	10.2.212.143
37	10.2.212.144/30	10.2.212.145 – 10.2.212.146	10.2.212.147
38	10.2.212.148/30	10.2.212.149 – 10.2.212.150	10.2.212.151
39	10.2.212.152/30	10.2.212.153 – 10.2.212.154	10.2.212.155
40	10.2.212.156/30	10.2.212.157 – 10.2.212.158	10.2.212.159
41	10.2.212.160/30	10.2.212.161 – 10.2.212.162	10.2.212.163
42	10.2.212.164/30	10.2.212.165 – 10.2.212.166	10.2.212.167
43	10.2.212.168/30	10.2.212.169 – 10.2.212.170	10.2.212.171
44	10.2.212.172/30	10.2.212.173 – 10.2.212.174	10.2.212.175
45	10.2.212.176/30	10.2.212.177 – 10.2.212.178	10.2.212.179
46	10.2.212.180/30	10.2.212.181 – 10.2.212.182	10.2.212.183
47	10.2.212.184/30	10.2.212.185 – 10.2.212.186	10.2.212.187
48	10.2.212.188/30	10.2.212.189 – 10.2.212.190	10.2.212.191
49	10.2.212.192/30	10.2.212.193 – 10.2.212.194	10.2.212.195
50	10.2.212.196/30	10.2.212.197 – 10.2.212.198	10.2.212.199
51	10.2.212.200/30	10.2.212.201 – 10.2.212.202	10.2.212.203
52	10.2.212.204/30	10.2.212.205 – 10.2.212.206	10.2.212.207
53	10.2.212.208/30	10.2.212.209 – 10.2.212.210	10.2.212.211
54	10.2.212.212/30	10.2.212.213 – 10.2.212.214	10.2.212.215
55	10.2.212.216/30	10.2.212.217 – 10.2.212.218	10.2.212.219
56	10.2.212.220/30	10.2.212.221 – 10.2.212.222	10.2.212.223
57	10.2.212.224/30	10.2.212.225 – 10.2.212.226	10.2.212.227
58	10.2.212.228/30	10.2.212.229 – 10.2.212.230	10.2.212.231
59	10.2.212.232/30	10.2.212.233 – 10.2.212.234	10.2.212.235
60	10.2.212.236/30	10.2.212.237 – 10.2.212.238	10.2.212.239
61	10.2.212.240/30	10.2.212.241 – 10.2.212.242	10.2.212.243
62	10.2.212.244/30	10.2.212.245 – 10.2.212.246	10.2.212.247
63	10.2.212.248/30	10.2.212.249 – 10.2.212.250	10.2.212.251
64	10.2.212.252/30	10.2.212.253 – 10.2.212.254	10.2.212.255
65	10.2.213.0/30	10.2.213.1 – 10.2.213.2	10.2.213.3
66	10.2.213.4/30	10.2.213.5 – 10.2.213.6	10.2.213.7
67	10.2.213.8/30	10.2.213.9 – 10.2.213.10	10.2.213.11
68	10.2.213.12/30	10.2.213.13 – 10.2.213.14	10.2.213.15
69	10.2.213.16/30	10.2.213.17 – 10.2.213.18	10.2.213.19
70	10.2.213.20/30	10.2.213.21 – 10.2.213.22	10.2.213.23
71	10.2.213.24/30	10.2.213.25 – 10.2.213.26	10.2.213.27
72	10.2.213.28/30	10.2.213.29 – 10.2.213.30	10.2.213.31
73	10.2.213.32/30	10.2.213.33 – 10.2.213.34	10.2.213.35
74	10.2.213.36/30	10.2.213.37 – 10.2.213.38	10.2.213.39
75	10.2.213.40/30	10.2.213.41 – 10.2.213.42	10.2.213.43
76	10.2.213.44/30	10.2.213.45 – 10.2.213.46	10.2.213.47
77	10.2.213.48/30	10.2.213.49 – 10.2.213.50	10.2.213.51
78	10.2.213.52/30	10.2.213.53 – 10.2.213.54	10.2.213.55
79	10.2.213.56/30	10.2.213.57 – 10.2.213.58	10.2.213.59
80	10.2.213.60/30	10.2.213.61 – 10.2.213.62	10.2.213.63
81	10.2.213.64/30	10.2.213.65 – 10.2.213.66	10.2.213.67
82	10.2.213.68/30	10.2.213.69 – 10.2.213.70	10.2.213.71
83	10.2.213.72/30	10.2.213.73 – 10.2.213.74	10.2.213.75
84	10.2.213.76/30	10.2.213.77 – 10.2.213.78	10.2.213.79
85	10.2.213.80/30	10.2.213.81 – 10.2.213.82	10.2.213.83
86	10.2.213.84/30	10.2.213.85 – 10.2.213.86	10.2.213.87
87	10.2.213.88/30	10.2.213.89 – 10.2.213.90	10.2.213.91
88	10.2.213.92/30	10.2.213.93 – 10.2.213.94	10.2.213.95
89	10.2.213.96/30	10.2.213.97 – 10.2.213.98	10.2.213.99
90	10.2.213.100/30	10.2.213.101 – 10.2.213.102	10.2.213.103
91	10.2.213.104/30	10.2.213.105 – 10.2.213.106	10.2.213.107
92	10.2.213.108/30	10.2.213.109 – 10.2.213.110	10.2.213.111
93	10.2.213.112/30	10.2.213.113 – 10.2.213.114	10.2.213.115
94	10.2.213.116/30	10.2.213.117 – 10.2.213.118	10.2.213.119
95	10.2.213.120/30	10.2.213.121 – 10.2.213.122	10.2.213.123
96	10.2.213.124/30	10.2.213.125 – 10.2.213.126	10.2.213.127
97	10.2.213.128/30	10.2.213.129 – 10.2.213.130	10.2.213.131
98	10.2.213.132/30	10.2.213.133 – 10.2.213.134	10.2.213.135
99	10.2.213.136/30	10.2.213.137 – 10.2.213.138	10.2.213.139
100	10.2.213.140/30	10.2.213.141 – 10.2.213.142	10.2.213.143
101	10.2.213.144/30	10.2.213.145 – 10.2.213.146	10.2.213.147
102	10.2.213.148/30	10.2.213.149 – 10.2.213.150	10.2.213.151
103	10.2.213.152/30	10.2.213.153 – 10.2.213.154	10.2.213.155
104	10.2.213.156/30	10.2.213.157 – 10.2.213.158	10.2.213.159
105	10.2.213.160/30	10.2.213.161 – 10.2.213.162	10.2.213.163
106	10.2.213.164/30	10.2.213.165 – 10.2.213.166	10.2.213.167
107	10.2.213.168/30	10.2.213.169 – 10.2.213.170	10.2.213.171
108	10.2.213.172/30	10.2.213.173 – 10.2.213.174	10.2.213.175
109	10.2.213.176/30	10.2.213.177 – 10.2.213.178	10.2.213.179
110	10.2.213.180/30	10.2.213.181 – 10.2.213.182	10.2.213.183
111	10.2.213.184/30	10.2.213.185 – 10.2.213.186	10.2.213.187
112	10.2.213.188/30	10.2.213.189 – 10.2.213.190	10.2.213.191
113	10.2.213.192/30	10.2.213.193 – 10.2.213.194	10.2.213.195
114	10.2.213.196/30	10.2.213.197 – 10.2.213.198	10.2.213.199
115	10.2.213.200/30	10.2.213.201 – 10.2.213.202	10.2.213.203
116	10.2.213.204/30	10.2.213.205 – 10.2.213.206	10.2.213.207
117	10.2.213.208/30	10.2.213.209 – 10.2.213.210	10.2.213.211
118	10.2.213.212/30	10.2.213.213 – 10.2.213.214	10.2.213.215
119	10.2.213.216/30	10.2.213.217 – 10.2.213.218	10.2.213.219
120	10.2.213.220/30	10.2.213.221 – 10.2.213.222	10.2.213.223
121	10.2.213.224/30	10.2.213.225 – 10.2.213.226	10.2.213.227
122	10.2.213.228/30	10.2.213.229 – 10.2.213.230	10.2.213.231
123	10.2.213.232/30	10.2.213.233 – 10.2.213.234	10.2.213.235
124	10.2.213.236/30	10.2.213.237 – 10.2.213.238	10.2.213.239
125	10.2.213.240/30	10.2.213.241 – 10.2.213.242	10.2.213.243
126	10.2.213.244/30	10.2.213.245 – 10.2.213.246	10.2.213.247
127	10.2.213.248/30	10.2.213.249 – 10.2.213.250	10.2.213.251
128	10.2.213.252/30	10.2.213.253 – 10.2.213.254	10.2.213.255
129	10.2.214.0/30	10.2.214.1 – 10.2.214.2	10.2.214.3
130	10.2.214.4/30	10.2.214.5 – 10.2.214.6	10.2.214.7
131	10.2.214.8/30	10.2.214.9 – 10.2.214.10	10.2.214.11
132	10.2.214.12/30	10.2.214.13 – 10.2.214.14	10.2.214.15
133	10.2.214.16/30	10.2.214.17 – 10.2.214.18	10.2.214.19
134	10.2.214.20/30	10.2.214.21 – 10.2.214.22	10.2.214.23
135	10.2.214.24/30	10.2.214.25 – 10.2.214.26	10.2.214.27
136	10.2.214.28/30	10.2.214.29 – 10.2.214.30	10.2.214.31
137	10.2.214.32/30	10.2.214.33 – 10.2.214.34	10.2.214.35
138	10.2.214.36/30	10.2.214.37 – 10.2.214.38	10.2.214.39
139	10.2.214.40/30	10.2.214.41 – 10.2.214.42	10.2.214.43
140	10.2.214.44/30	10.2.214.45 – 10.2.214.46	10.2.214.47
141	10.2.214.48/30	10.2.214.49 – 10.2.214.50	10.2.214.51
142	10.2.214.52/30	10.2.214.53 – 10.2.214.54	10.2.214.55
143	10.2.214.56/30	10.2.214.57 – 10.2.214.58	10.2.214.59
144	10.2.214.60/30	10.2.214.61 – 10.2.214.62	10.2.214.63
145	10.2.214.64/30	10.2.214.65 – 10.2.214.66	10.2.214.67
146	10.2.214.68/30	10.2.214.69 – 10.2.214.70	10.2.214.71
147	10.2.214.72/30	10.2.214.73 – 10.2.214.74	10.2.214.75
148	10.2.214.76/30	10.2.214.77 – 10.2.214.78	10.2.214.79
149	10.2.214.80/30	10.2.214.81 – 10.2.214.82	10.2.214.83
150	10.2.214.84/30	10.2.214.85 – 10.2.214.86	10.2.214.87
151	10.2.214.88/30	10.2.214.89 – 10.2.214.90	10.2.214.91
152	10.2.214.92/30	10.2.214.93 – 10.2.214.94	10.2.214.95
153	10.2.214.96/30	10.2.214.97 – 10.2.214.98	10.2.214.99
154	10.2.214.100/30	10.2.214.101 – 10.2.214.102	10.2.214.103
155	10.2.214.104/30	10.2.214.105 – 10.2.214.106	10.2.214.107
156	10.2.214.108/30	10.2.214.109 – 10.2.214.110	10.2.214.111
157	10.2.214.112/30	10.2.214.113 – 10.2.214.114	10.2.214.115
158	10.2.214.116/30	10.2.214.117 – 10.2.214.118	10.2.214.119
159	10.2.214.120/30	10.2.214.121 – 10.2.214.122	10.2.214.123
160	10.2.214.124/30	10.2.214.125 – 10.2.214.126	10.2.214.127
161	10.2.214.128/30	10.2.214.129 – 10.2.214.130	10.2.214.131
162	10.2.214.132/30	10.2.214.133 – 10.2.214.134	10.2.214.135
163	10.2.214.136/30	10.2.214.137 – 10.2.214.138	10.2.214.139
164	10.2.214.140/30	10.2.214.141 – 10.2.214.142	10.2.214.143
165	10.2.214.144/30	10.2.214.145 – 10.2.214.146	10.2.214.147
166	10.2.214.148/30	10.2.214.149 – 10.2.214.150	10.2.214.151
167	10.2.214.152/30	10.2.214.153 – 10.2.214.154	10.2.214.155
168	10.2.214.156/30	10.2.214.157 – 10.2.214.158	10.2.214.159
169	10.2.214.160/30	10.2.214.161 – 10.2.214.162	10.2.214.163
170	10.2.214.164/30	10.2.214.165 – 10.2.214.166	10.2.214.167
171	10.2.214.168/30	10.2.214.169 – 10.2.214.170	10.2.214.171
172	10.2.214.172/30	10.2.214.173 – 10.2.214.174	10.2.214.175
173	10.2.214.176/30	10.2.214.177 – 10.2.214.178	10.2.214.179
174	10.2.214.180/30	10.2.214.181 – 10.2.214.182	10.2.214.183
175	10.2.214.184/30	10.2.214.185 – 10.2.214.186	10.2.214.187
176	10.2.214.188/30	10.2.214.189 – 10.2.214.190	10.2.214.191
177	10.2.214.192/30	10.2.214.193 – 10.2.214.194	10.2.214.195
178	10.2.214.196/30	10.2.214.197 – 10.2.214.198	10.2.214.199
179	10.2.214.200/30	10.2.214.201 – 10.2.214.202	10.2.214.203
180	10.2.214.204/30	10.2.214.205 – 10.2.214.206	10.2.214.207
181	10.2.214.208/30	10.2.214.209 – 10.2.214.210	10.2.214.211
182	10.2.214.212/30	10.2.214.213 – 10.2.214.214	10.2.214.215
183	10.2.214.216/30	10.2.214.217 – 10.2.214.218	10.2.214.219
184	10.2.214.220/30	10.2.214.221 – 10.2.214.222	10.2.214.223
185	10.2.214.224/30	10.2.214.225 – 10.2.214.226	10.2.214.227
186	10.2.214.228/30	10.2.214.229 – 10.2.214.230	10.2.214.231
187	10.2.214.232/30	10.2.214.233 – 10.2.214.234	10.2.214.235
188	10.2.214.236/30	10.2.214.237 – 10.2.214.238	10.2.214.239
189	10.2.214.240/30	10.2.214.241 – 10.2.214.242	10.2.214.243
190	10.2.214.244/30	10.2.214.245 – 10.2.214.246	10.2.214.247
191	10.2.214.248/30	10.2.214.249 – 10.2.214.250	10.2.214.251
192	10.2.214.252/30	10.2.214.253 – 10.2.214.254	10.2.214.255
193	10.2.215.0/30	10.2.215.1 – 10.2.215.2	10.2.215.3
194	10.2.215.4/30	10.2.215.5 – 10.2.215.6	10.2.215.7
195	10.2.215.8/30	10.2.215.9 – 10.2.215.10	10.2.215.11
196	10.2.215.12/30	10.2.215.13 – 10.2.215.14	10.2.215.15
197	10.2.215.16/30	10.2.215.17 – 10.2.215.18	10.2.215.19
198	10.2.215.20/30	10.2.215.21 – 10.2.215.22	10.2.215.23
199	10.2.215.24/30	10.2.215.25 – 10.2.215.26	10.2.215.27
200	10.2.215.28/30	10.2.215.29 – 10.2.215.30	10.2.215.31
201	10.2.215.32/30	10.2.215.33 – 10.2.215.34	10.2.215.35
202	10.2.215.36/30	10.2.215.37 – 10.2.215.38	10.2.215.39
203	10.2.215.40/30	10.2.215.41 – 10.2.215.42	10.2.215.43
204	10.2.215.44/30	10.2.215.45 – 10.2.215.46	10.2.215.47
205	10.2.215.48/30	10.2.215.49 – 10.2.215.50	10.2.215.51
206	10.2.215.52/30	10.2.215.53 – 10.2.215.54	10.2.215.55
207	10.2.215.56/30	10.2.215.57 – 10.2.215.58	10.2.215.59
208	10.2.215.60/30	10.2.215.61 – 10.2.215.62	10.2.215.63
209	10.2.215.64/30	10.2.215.65 – 10.2.215.66	10.2.215.67
210	10.2.215.68/30	10.2.215.69 – 10.2.215.70	10.2.215.71
211	10.2.215.72/30	10.2.215.73 – 10.2.215.74	10.2.215.75
212	10.2.215.76/30	10.2.215.77 – 10.2.215.78	10.2.215.79
213	10.2.215.80/30	10.2.215.81 – 10.2.215.82	10.2.215.83
214	10.2.215.84/30	10.2.215.85 – 10.2.215.86	10.2.215.87
215	10.2.215.88/30	10.2.215.89 – 10.2.215.90	10.2.215.91
216	10.2.215.92/30	10.2.215.93 – 10.2.215.94	10.2.215.95
217	10.2.215.96/30	10.2.215.97 – 10.2.215.98	10.2.215.99
218	10.2.215.100/30	10.2.215.101 – 10.2.215.102	10.2.215.103
219	10.2.215.104/30	10.2.215.105 – 10.2.215.106	10.2.215.107
220	10.2.215.108/30	10.2.215.109 – 10.2.215.110	10.2.215.111
221	10.2.215.112/30	10.2.215.113 – 10.2.215.114	10.2.215.115
222	10.2.215.116/30	10.2.215.117 – 10.2.215.118	10.2.215.119
223	10.2.215.120/30	10.2.215.121 – 10.2.215.122	10.2.215.123
224	10.2.215.124/30	10.2.215.125 – 10.2.215.126	10.2.215.127
225	10.2.215.128/30	10.2.215.129 – 10.2.215.130	10.2.215.131
226	10.2.215.132/30	10.2.215.133 – 10.2.215.134	10.2.215.135
227	10.2.215.136/30	10.2.215.137 – 10.2.215.138	10.2.215.139
228	10.2.215.140/30	10.2.215.141 – 10.2.215.142	10.2.215.143
229	10.2.215.144/30	10.2.215.145 – 10.2.215.146	10.2.215.147
230	10.2.215.148/30	10.2.215.149 – 10.2.215.150	10.2.215.151
231	10.2.215.152/30	10.2.215.153 – 10.2.215.154	10.2.215.155
232	10.2.215.156/30	10.2.215.157 – 10.2.215.158	10.2.215.159
233	10.2.215.160/30	10.2.215.161 – 10.2.215.162	10.2.215.163
234	10.2.215.164/30	10.2.215.165 – 10.2.215.166	10.2.215.167
235	10.2.215.168/30	10.2.215.169 – 10.2.215.170	10.2.215.171
236	10.2.215.172/30	10.2.215.173 – 10.2.215.174	10.2.215.175
237	10.2.215.176/30	10.2.215.177 – 10.2.215.178	10.2.215.179
238	10.2.215.180/30	10.2.215.181 – 10.2.215.182	10.2.215.183
239	10.2.215.184/30	10.2.215.185 – 10.2.215.186	10.2.215.187
240	10.2.215.188/30	10.2.215.189 – 10.2.215.190	10.2.215.191
241	10.2.215.192/30	10.2.215.193 – 10.2.215.194	10.2.215.195
242	10.2.215.196/30	10.2.215.197 – 10.2.215.198	10.2.215.199
243	10.2.215.200/30	10.2.215.201 – 10.2.215.202	10.2.215.203
244	10.2.215.204/30	10.2.215.205 – 10.2.215.206	10.2.215.207
245	10.2.215.208/30	10.2.215.209 – 10.2.215.210	10.2.215.211
246	10.2.215.212/30	10.2.215.213 – 10.2.215.214	10.2.215.215
247	10.2.215.216/30	10.2.215.217 – 10.2.215.218	10.2.215.219
248	10.2.215.220/30	10.2.215.221 – 10.2.215.222	10.2.215.223
249	10.2.215.224/30	10.2.215.225 – 10.2.215.226	10.2.215.227
250	10.2.215.228/30	10.2.215.229 – 10.2.215.230	10.2.215.231
251	10.2.215.232/30	10.2.215.233 – 10.2.215.234	10.2.215.235
252	10.2.215.236/30	10.2.215.237 – 10.2.215.238	10.2.215.239
253	10.2.215.240/30	10.2.215.241 – 10.2.215.242	10.2.215.243
254	10.2.215.244/30	10.2.215.245 – 10.2.215.246	10.2.215.247
255	10.2.215.248/30	10.2.215.249 – 10.2.215.250	10.2.215.251
256	10.2.215.252/30	10.2.215.253 – 10.2.215.254	10.2.215.255

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 →