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)10.3.168.0/22

network10.3.168.0/22

broadcast10.3.171.255

first host10.3.168.1

last host10.3.171.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.168.0/22

address00001010.00000011.10101000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10101000.00000000

broadcast00001010.00000011.10101011.11111111

green = network part, grey = host part

hex0x0a03a800

decimal168011776

reverse dns0.168.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.168.0/30	10.3.168.1 – 10.3.168.2	10.3.168.3
2	10.3.168.4/30	10.3.168.5 – 10.3.168.6	10.3.168.7
3	10.3.168.8/30	10.3.168.9 – 10.3.168.10	10.3.168.11
4	10.3.168.12/30	10.3.168.13 – 10.3.168.14	10.3.168.15
5	10.3.168.16/30	10.3.168.17 – 10.3.168.18	10.3.168.19
6	10.3.168.20/30	10.3.168.21 – 10.3.168.22	10.3.168.23
7	10.3.168.24/30	10.3.168.25 – 10.3.168.26	10.3.168.27
8	10.3.168.28/30	10.3.168.29 – 10.3.168.30	10.3.168.31
9	10.3.168.32/30	10.3.168.33 – 10.3.168.34	10.3.168.35
10	10.3.168.36/30	10.3.168.37 – 10.3.168.38	10.3.168.39
11	10.3.168.40/30	10.3.168.41 – 10.3.168.42	10.3.168.43
12	10.3.168.44/30	10.3.168.45 – 10.3.168.46	10.3.168.47
13	10.3.168.48/30	10.3.168.49 – 10.3.168.50	10.3.168.51
14	10.3.168.52/30	10.3.168.53 – 10.3.168.54	10.3.168.55
15	10.3.168.56/30	10.3.168.57 – 10.3.168.58	10.3.168.59
16	10.3.168.60/30	10.3.168.61 – 10.3.168.62	10.3.168.63
17	10.3.168.64/30	10.3.168.65 – 10.3.168.66	10.3.168.67
18	10.3.168.68/30	10.3.168.69 – 10.3.168.70	10.3.168.71
19	10.3.168.72/30	10.3.168.73 – 10.3.168.74	10.3.168.75
20	10.3.168.76/30	10.3.168.77 – 10.3.168.78	10.3.168.79
21	10.3.168.80/30	10.3.168.81 – 10.3.168.82	10.3.168.83
22	10.3.168.84/30	10.3.168.85 – 10.3.168.86	10.3.168.87
23	10.3.168.88/30	10.3.168.89 – 10.3.168.90	10.3.168.91
24	10.3.168.92/30	10.3.168.93 – 10.3.168.94	10.3.168.95
25	10.3.168.96/30	10.3.168.97 – 10.3.168.98	10.3.168.99
26	10.3.168.100/30	10.3.168.101 – 10.3.168.102	10.3.168.103
27	10.3.168.104/30	10.3.168.105 – 10.3.168.106	10.3.168.107
28	10.3.168.108/30	10.3.168.109 – 10.3.168.110	10.3.168.111
29	10.3.168.112/30	10.3.168.113 – 10.3.168.114	10.3.168.115
30	10.3.168.116/30	10.3.168.117 – 10.3.168.118	10.3.168.119
31	10.3.168.120/30	10.3.168.121 – 10.3.168.122	10.3.168.123
32	10.3.168.124/30	10.3.168.125 – 10.3.168.126	10.3.168.127
33	10.3.168.128/30	10.3.168.129 – 10.3.168.130	10.3.168.131
34	10.3.168.132/30	10.3.168.133 – 10.3.168.134	10.3.168.135
35	10.3.168.136/30	10.3.168.137 – 10.3.168.138	10.3.168.139
36	10.3.168.140/30	10.3.168.141 – 10.3.168.142	10.3.168.143
37	10.3.168.144/30	10.3.168.145 – 10.3.168.146	10.3.168.147
38	10.3.168.148/30	10.3.168.149 – 10.3.168.150	10.3.168.151
39	10.3.168.152/30	10.3.168.153 – 10.3.168.154	10.3.168.155
40	10.3.168.156/30	10.3.168.157 – 10.3.168.158	10.3.168.159
41	10.3.168.160/30	10.3.168.161 – 10.3.168.162	10.3.168.163
42	10.3.168.164/30	10.3.168.165 – 10.3.168.166	10.3.168.167
43	10.3.168.168/30	10.3.168.169 – 10.3.168.170	10.3.168.171
44	10.3.168.172/30	10.3.168.173 – 10.3.168.174	10.3.168.175
45	10.3.168.176/30	10.3.168.177 – 10.3.168.178	10.3.168.179
46	10.3.168.180/30	10.3.168.181 – 10.3.168.182	10.3.168.183
47	10.3.168.184/30	10.3.168.185 – 10.3.168.186	10.3.168.187
48	10.3.168.188/30	10.3.168.189 – 10.3.168.190	10.3.168.191
49	10.3.168.192/30	10.3.168.193 – 10.3.168.194	10.3.168.195
50	10.3.168.196/30	10.3.168.197 – 10.3.168.198	10.3.168.199
51	10.3.168.200/30	10.3.168.201 – 10.3.168.202	10.3.168.203
52	10.3.168.204/30	10.3.168.205 – 10.3.168.206	10.3.168.207
53	10.3.168.208/30	10.3.168.209 – 10.3.168.210	10.3.168.211
54	10.3.168.212/30	10.3.168.213 – 10.3.168.214	10.3.168.215
55	10.3.168.216/30	10.3.168.217 – 10.3.168.218	10.3.168.219
56	10.3.168.220/30	10.3.168.221 – 10.3.168.222	10.3.168.223
57	10.3.168.224/30	10.3.168.225 – 10.3.168.226	10.3.168.227
58	10.3.168.228/30	10.3.168.229 – 10.3.168.230	10.3.168.231
59	10.3.168.232/30	10.3.168.233 – 10.3.168.234	10.3.168.235
60	10.3.168.236/30	10.3.168.237 – 10.3.168.238	10.3.168.239
61	10.3.168.240/30	10.3.168.241 – 10.3.168.242	10.3.168.243
62	10.3.168.244/30	10.3.168.245 – 10.3.168.246	10.3.168.247
63	10.3.168.248/30	10.3.168.249 – 10.3.168.250	10.3.168.251
64	10.3.168.252/30	10.3.168.253 – 10.3.168.254	10.3.168.255
65	10.3.169.0/30	10.3.169.1 – 10.3.169.2	10.3.169.3
66	10.3.169.4/30	10.3.169.5 – 10.3.169.6	10.3.169.7
67	10.3.169.8/30	10.3.169.9 – 10.3.169.10	10.3.169.11
68	10.3.169.12/30	10.3.169.13 – 10.3.169.14	10.3.169.15
69	10.3.169.16/30	10.3.169.17 – 10.3.169.18	10.3.169.19
70	10.3.169.20/30	10.3.169.21 – 10.3.169.22	10.3.169.23
71	10.3.169.24/30	10.3.169.25 – 10.3.169.26	10.3.169.27
72	10.3.169.28/30	10.3.169.29 – 10.3.169.30	10.3.169.31
73	10.3.169.32/30	10.3.169.33 – 10.3.169.34	10.3.169.35
74	10.3.169.36/30	10.3.169.37 – 10.3.169.38	10.3.169.39
75	10.3.169.40/30	10.3.169.41 – 10.3.169.42	10.3.169.43
76	10.3.169.44/30	10.3.169.45 – 10.3.169.46	10.3.169.47
77	10.3.169.48/30	10.3.169.49 – 10.3.169.50	10.3.169.51
78	10.3.169.52/30	10.3.169.53 – 10.3.169.54	10.3.169.55
79	10.3.169.56/30	10.3.169.57 – 10.3.169.58	10.3.169.59
80	10.3.169.60/30	10.3.169.61 – 10.3.169.62	10.3.169.63
81	10.3.169.64/30	10.3.169.65 – 10.3.169.66	10.3.169.67
82	10.3.169.68/30	10.3.169.69 – 10.3.169.70	10.3.169.71
83	10.3.169.72/30	10.3.169.73 – 10.3.169.74	10.3.169.75
84	10.3.169.76/30	10.3.169.77 – 10.3.169.78	10.3.169.79
85	10.3.169.80/30	10.3.169.81 – 10.3.169.82	10.3.169.83
86	10.3.169.84/30	10.3.169.85 – 10.3.169.86	10.3.169.87
87	10.3.169.88/30	10.3.169.89 – 10.3.169.90	10.3.169.91
88	10.3.169.92/30	10.3.169.93 – 10.3.169.94	10.3.169.95
89	10.3.169.96/30	10.3.169.97 – 10.3.169.98	10.3.169.99
90	10.3.169.100/30	10.3.169.101 – 10.3.169.102	10.3.169.103
91	10.3.169.104/30	10.3.169.105 – 10.3.169.106	10.3.169.107
92	10.3.169.108/30	10.3.169.109 – 10.3.169.110	10.3.169.111
93	10.3.169.112/30	10.3.169.113 – 10.3.169.114	10.3.169.115
94	10.3.169.116/30	10.3.169.117 – 10.3.169.118	10.3.169.119
95	10.3.169.120/30	10.3.169.121 – 10.3.169.122	10.3.169.123
96	10.3.169.124/30	10.3.169.125 – 10.3.169.126	10.3.169.127
97	10.3.169.128/30	10.3.169.129 – 10.3.169.130	10.3.169.131
98	10.3.169.132/30	10.3.169.133 – 10.3.169.134	10.3.169.135
99	10.3.169.136/30	10.3.169.137 – 10.3.169.138	10.3.169.139
100	10.3.169.140/30	10.3.169.141 – 10.3.169.142	10.3.169.143
101	10.3.169.144/30	10.3.169.145 – 10.3.169.146	10.3.169.147
102	10.3.169.148/30	10.3.169.149 – 10.3.169.150	10.3.169.151
103	10.3.169.152/30	10.3.169.153 – 10.3.169.154	10.3.169.155
104	10.3.169.156/30	10.3.169.157 – 10.3.169.158	10.3.169.159
105	10.3.169.160/30	10.3.169.161 – 10.3.169.162	10.3.169.163
106	10.3.169.164/30	10.3.169.165 – 10.3.169.166	10.3.169.167
107	10.3.169.168/30	10.3.169.169 – 10.3.169.170	10.3.169.171
108	10.3.169.172/30	10.3.169.173 – 10.3.169.174	10.3.169.175
109	10.3.169.176/30	10.3.169.177 – 10.3.169.178	10.3.169.179
110	10.3.169.180/30	10.3.169.181 – 10.3.169.182	10.3.169.183
111	10.3.169.184/30	10.3.169.185 – 10.3.169.186	10.3.169.187
112	10.3.169.188/30	10.3.169.189 – 10.3.169.190	10.3.169.191
113	10.3.169.192/30	10.3.169.193 – 10.3.169.194	10.3.169.195
114	10.3.169.196/30	10.3.169.197 – 10.3.169.198	10.3.169.199
115	10.3.169.200/30	10.3.169.201 – 10.3.169.202	10.3.169.203
116	10.3.169.204/30	10.3.169.205 – 10.3.169.206	10.3.169.207
117	10.3.169.208/30	10.3.169.209 – 10.3.169.210	10.3.169.211
118	10.3.169.212/30	10.3.169.213 – 10.3.169.214	10.3.169.215
119	10.3.169.216/30	10.3.169.217 – 10.3.169.218	10.3.169.219
120	10.3.169.220/30	10.3.169.221 – 10.3.169.222	10.3.169.223
121	10.3.169.224/30	10.3.169.225 – 10.3.169.226	10.3.169.227
122	10.3.169.228/30	10.3.169.229 – 10.3.169.230	10.3.169.231
123	10.3.169.232/30	10.3.169.233 – 10.3.169.234	10.3.169.235
124	10.3.169.236/30	10.3.169.237 – 10.3.169.238	10.3.169.239
125	10.3.169.240/30	10.3.169.241 – 10.3.169.242	10.3.169.243
126	10.3.169.244/30	10.3.169.245 – 10.3.169.246	10.3.169.247
127	10.3.169.248/30	10.3.169.249 – 10.3.169.250	10.3.169.251
128	10.3.169.252/30	10.3.169.253 – 10.3.169.254	10.3.169.255
129	10.3.170.0/30	10.3.170.1 – 10.3.170.2	10.3.170.3
130	10.3.170.4/30	10.3.170.5 – 10.3.170.6	10.3.170.7
131	10.3.170.8/30	10.3.170.9 – 10.3.170.10	10.3.170.11
132	10.3.170.12/30	10.3.170.13 – 10.3.170.14	10.3.170.15
133	10.3.170.16/30	10.3.170.17 – 10.3.170.18	10.3.170.19
134	10.3.170.20/30	10.3.170.21 – 10.3.170.22	10.3.170.23
135	10.3.170.24/30	10.3.170.25 – 10.3.170.26	10.3.170.27
136	10.3.170.28/30	10.3.170.29 – 10.3.170.30	10.3.170.31
137	10.3.170.32/30	10.3.170.33 – 10.3.170.34	10.3.170.35
138	10.3.170.36/30	10.3.170.37 – 10.3.170.38	10.3.170.39
139	10.3.170.40/30	10.3.170.41 – 10.3.170.42	10.3.170.43
140	10.3.170.44/30	10.3.170.45 – 10.3.170.46	10.3.170.47
141	10.3.170.48/30	10.3.170.49 – 10.3.170.50	10.3.170.51
142	10.3.170.52/30	10.3.170.53 – 10.3.170.54	10.3.170.55
143	10.3.170.56/30	10.3.170.57 – 10.3.170.58	10.3.170.59
144	10.3.170.60/30	10.3.170.61 – 10.3.170.62	10.3.170.63
145	10.3.170.64/30	10.3.170.65 – 10.3.170.66	10.3.170.67
146	10.3.170.68/30	10.3.170.69 – 10.3.170.70	10.3.170.71
147	10.3.170.72/30	10.3.170.73 – 10.3.170.74	10.3.170.75
148	10.3.170.76/30	10.3.170.77 – 10.3.170.78	10.3.170.79
149	10.3.170.80/30	10.3.170.81 – 10.3.170.82	10.3.170.83
150	10.3.170.84/30	10.3.170.85 – 10.3.170.86	10.3.170.87
151	10.3.170.88/30	10.3.170.89 – 10.3.170.90	10.3.170.91
152	10.3.170.92/30	10.3.170.93 – 10.3.170.94	10.3.170.95
153	10.3.170.96/30	10.3.170.97 – 10.3.170.98	10.3.170.99
154	10.3.170.100/30	10.3.170.101 – 10.3.170.102	10.3.170.103
155	10.3.170.104/30	10.3.170.105 – 10.3.170.106	10.3.170.107
156	10.3.170.108/30	10.3.170.109 – 10.3.170.110	10.3.170.111
157	10.3.170.112/30	10.3.170.113 – 10.3.170.114	10.3.170.115
158	10.3.170.116/30	10.3.170.117 – 10.3.170.118	10.3.170.119
159	10.3.170.120/30	10.3.170.121 – 10.3.170.122	10.3.170.123
160	10.3.170.124/30	10.3.170.125 – 10.3.170.126	10.3.170.127
161	10.3.170.128/30	10.3.170.129 – 10.3.170.130	10.3.170.131
162	10.3.170.132/30	10.3.170.133 – 10.3.170.134	10.3.170.135
163	10.3.170.136/30	10.3.170.137 – 10.3.170.138	10.3.170.139
164	10.3.170.140/30	10.3.170.141 – 10.3.170.142	10.3.170.143
165	10.3.170.144/30	10.3.170.145 – 10.3.170.146	10.3.170.147
166	10.3.170.148/30	10.3.170.149 – 10.3.170.150	10.3.170.151
167	10.3.170.152/30	10.3.170.153 – 10.3.170.154	10.3.170.155
168	10.3.170.156/30	10.3.170.157 – 10.3.170.158	10.3.170.159
169	10.3.170.160/30	10.3.170.161 – 10.3.170.162	10.3.170.163
170	10.3.170.164/30	10.3.170.165 – 10.3.170.166	10.3.170.167
171	10.3.170.168/30	10.3.170.169 – 10.3.170.170	10.3.170.171
172	10.3.170.172/30	10.3.170.173 – 10.3.170.174	10.3.170.175
173	10.3.170.176/30	10.3.170.177 – 10.3.170.178	10.3.170.179
174	10.3.170.180/30	10.3.170.181 – 10.3.170.182	10.3.170.183
175	10.3.170.184/30	10.3.170.185 – 10.3.170.186	10.3.170.187
176	10.3.170.188/30	10.3.170.189 – 10.3.170.190	10.3.170.191
177	10.3.170.192/30	10.3.170.193 – 10.3.170.194	10.3.170.195
178	10.3.170.196/30	10.3.170.197 – 10.3.170.198	10.3.170.199
179	10.3.170.200/30	10.3.170.201 – 10.3.170.202	10.3.170.203
180	10.3.170.204/30	10.3.170.205 – 10.3.170.206	10.3.170.207
181	10.3.170.208/30	10.3.170.209 – 10.3.170.210	10.3.170.211
182	10.3.170.212/30	10.3.170.213 – 10.3.170.214	10.3.170.215
183	10.3.170.216/30	10.3.170.217 – 10.3.170.218	10.3.170.219
184	10.3.170.220/30	10.3.170.221 – 10.3.170.222	10.3.170.223
185	10.3.170.224/30	10.3.170.225 – 10.3.170.226	10.3.170.227
186	10.3.170.228/30	10.3.170.229 – 10.3.170.230	10.3.170.231
187	10.3.170.232/30	10.3.170.233 – 10.3.170.234	10.3.170.235
188	10.3.170.236/30	10.3.170.237 – 10.3.170.238	10.3.170.239
189	10.3.170.240/30	10.3.170.241 – 10.3.170.242	10.3.170.243
190	10.3.170.244/30	10.3.170.245 – 10.3.170.246	10.3.170.247
191	10.3.170.248/30	10.3.170.249 – 10.3.170.250	10.3.170.251
192	10.3.170.252/30	10.3.170.253 – 10.3.170.254	10.3.170.255
193	10.3.171.0/30	10.3.171.1 – 10.3.171.2	10.3.171.3
194	10.3.171.4/30	10.3.171.5 – 10.3.171.6	10.3.171.7
195	10.3.171.8/30	10.3.171.9 – 10.3.171.10	10.3.171.11
196	10.3.171.12/30	10.3.171.13 – 10.3.171.14	10.3.171.15
197	10.3.171.16/30	10.3.171.17 – 10.3.171.18	10.3.171.19
198	10.3.171.20/30	10.3.171.21 – 10.3.171.22	10.3.171.23
199	10.3.171.24/30	10.3.171.25 – 10.3.171.26	10.3.171.27
200	10.3.171.28/30	10.3.171.29 – 10.3.171.30	10.3.171.31
201	10.3.171.32/30	10.3.171.33 – 10.3.171.34	10.3.171.35
202	10.3.171.36/30	10.3.171.37 – 10.3.171.38	10.3.171.39
203	10.3.171.40/30	10.3.171.41 – 10.3.171.42	10.3.171.43
204	10.3.171.44/30	10.3.171.45 – 10.3.171.46	10.3.171.47
205	10.3.171.48/30	10.3.171.49 – 10.3.171.50	10.3.171.51
206	10.3.171.52/30	10.3.171.53 – 10.3.171.54	10.3.171.55
207	10.3.171.56/30	10.3.171.57 – 10.3.171.58	10.3.171.59
208	10.3.171.60/30	10.3.171.61 – 10.3.171.62	10.3.171.63
209	10.3.171.64/30	10.3.171.65 – 10.3.171.66	10.3.171.67
210	10.3.171.68/30	10.3.171.69 – 10.3.171.70	10.3.171.71
211	10.3.171.72/30	10.3.171.73 – 10.3.171.74	10.3.171.75
212	10.3.171.76/30	10.3.171.77 – 10.3.171.78	10.3.171.79
213	10.3.171.80/30	10.3.171.81 – 10.3.171.82	10.3.171.83
214	10.3.171.84/30	10.3.171.85 – 10.3.171.86	10.3.171.87
215	10.3.171.88/30	10.3.171.89 – 10.3.171.90	10.3.171.91
216	10.3.171.92/30	10.3.171.93 – 10.3.171.94	10.3.171.95
217	10.3.171.96/30	10.3.171.97 – 10.3.171.98	10.3.171.99
218	10.3.171.100/30	10.3.171.101 – 10.3.171.102	10.3.171.103
219	10.3.171.104/30	10.3.171.105 – 10.3.171.106	10.3.171.107
220	10.3.171.108/30	10.3.171.109 – 10.3.171.110	10.3.171.111
221	10.3.171.112/30	10.3.171.113 – 10.3.171.114	10.3.171.115
222	10.3.171.116/30	10.3.171.117 – 10.3.171.118	10.3.171.119
223	10.3.171.120/30	10.3.171.121 – 10.3.171.122	10.3.171.123
224	10.3.171.124/30	10.3.171.125 – 10.3.171.126	10.3.171.127
225	10.3.171.128/30	10.3.171.129 – 10.3.171.130	10.3.171.131
226	10.3.171.132/30	10.3.171.133 – 10.3.171.134	10.3.171.135
227	10.3.171.136/30	10.3.171.137 – 10.3.171.138	10.3.171.139
228	10.3.171.140/30	10.3.171.141 – 10.3.171.142	10.3.171.143
229	10.3.171.144/30	10.3.171.145 – 10.3.171.146	10.3.171.147
230	10.3.171.148/30	10.3.171.149 – 10.3.171.150	10.3.171.151
231	10.3.171.152/30	10.3.171.153 – 10.3.171.154	10.3.171.155
232	10.3.171.156/30	10.3.171.157 – 10.3.171.158	10.3.171.159
233	10.3.171.160/30	10.3.171.161 – 10.3.171.162	10.3.171.163
234	10.3.171.164/30	10.3.171.165 – 10.3.171.166	10.3.171.167
235	10.3.171.168/30	10.3.171.169 – 10.3.171.170	10.3.171.171
236	10.3.171.172/30	10.3.171.173 – 10.3.171.174	10.3.171.175
237	10.3.171.176/30	10.3.171.177 – 10.3.171.178	10.3.171.179
238	10.3.171.180/30	10.3.171.181 – 10.3.171.182	10.3.171.183
239	10.3.171.184/30	10.3.171.185 – 10.3.171.186	10.3.171.187
240	10.3.171.188/30	10.3.171.189 – 10.3.171.190	10.3.171.191
241	10.3.171.192/30	10.3.171.193 – 10.3.171.194	10.3.171.195
242	10.3.171.196/30	10.3.171.197 – 10.3.171.198	10.3.171.199
243	10.3.171.200/30	10.3.171.201 – 10.3.171.202	10.3.171.203
244	10.3.171.204/30	10.3.171.205 – 10.3.171.206	10.3.171.207
245	10.3.171.208/30	10.3.171.209 – 10.3.171.210	10.3.171.211
246	10.3.171.212/30	10.3.171.213 – 10.3.171.214	10.3.171.215
247	10.3.171.216/30	10.3.171.217 – 10.3.171.218	10.3.171.219
248	10.3.171.220/30	10.3.171.221 – 10.3.171.222	10.3.171.223
249	10.3.171.224/30	10.3.171.225 – 10.3.171.226	10.3.171.227
250	10.3.171.228/30	10.3.171.229 – 10.3.171.230	10.3.171.231
251	10.3.171.232/30	10.3.171.233 – 10.3.171.234	10.3.171.235
252	10.3.171.236/30	10.3.171.237 – 10.3.171.238	10.3.171.239
253	10.3.171.240/30	10.3.171.241 – 10.3.171.242	10.3.171.243
254	10.3.171.244/30	10.3.171.245 – 10.3.171.246	10.3.171.247
255	10.3.171.248/30	10.3.171.249 – 10.3.171.250	10.3.171.251
256	10.3.171.252/30	10.3.171.253 – 10.3.171.254	10.3.171.255

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 →