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)10.4.36.0/22

network10.4.36.0/22

broadcast10.4.39.255

first host10.4.36.1

last host10.4.39.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.4.36.0/22

address00001010.00000100.00100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000100.00100100.00000000

broadcast00001010.00000100.00100111.11111111

green = network part, grey = host part

hex0x0a042400

decimal168043520

reverse dns0.36.4.10.in-addr.arpa

ipv4-mapped::ffff:a04:2400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.4.36.0/30	10.4.36.1 – 10.4.36.2	10.4.36.3
2	10.4.36.4/30	10.4.36.5 – 10.4.36.6	10.4.36.7
3	10.4.36.8/30	10.4.36.9 – 10.4.36.10	10.4.36.11
4	10.4.36.12/30	10.4.36.13 – 10.4.36.14	10.4.36.15
5	10.4.36.16/30	10.4.36.17 – 10.4.36.18	10.4.36.19
6	10.4.36.20/30	10.4.36.21 – 10.4.36.22	10.4.36.23
7	10.4.36.24/30	10.4.36.25 – 10.4.36.26	10.4.36.27
8	10.4.36.28/30	10.4.36.29 – 10.4.36.30	10.4.36.31
9	10.4.36.32/30	10.4.36.33 – 10.4.36.34	10.4.36.35
10	10.4.36.36/30	10.4.36.37 – 10.4.36.38	10.4.36.39
11	10.4.36.40/30	10.4.36.41 – 10.4.36.42	10.4.36.43
12	10.4.36.44/30	10.4.36.45 – 10.4.36.46	10.4.36.47
13	10.4.36.48/30	10.4.36.49 – 10.4.36.50	10.4.36.51
14	10.4.36.52/30	10.4.36.53 – 10.4.36.54	10.4.36.55
15	10.4.36.56/30	10.4.36.57 – 10.4.36.58	10.4.36.59
16	10.4.36.60/30	10.4.36.61 – 10.4.36.62	10.4.36.63
17	10.4.36.64/30	10.4.36.65 – 10.4.36.66	10.4.36.67
18	10.4.36.68/30	10.4.36.69 – 10.4.36.70	10.4.36.71
19	10.4.36.72/30	10.4.36.73 – 10.4.36.74	10.4.36.75
20	10.4.36.76/30	10.4.36.77 – 10.4.36.78	10.4.36.79
21	10.4.36.80/30	10.4.36.81 – 10.4.36.82	10.4.36.83
22	10.4.36.84/30	10.4.36.85 – 10.4.36.86	10.4.36.87
23	10.4.36.88/30	10.4.36.89 – 10.4.36.90	10.4.36.91
24	10.4.36.92/30	10.4.36.93 – 10.4.36.94	10.4.36.95
25	10.4.36.96/30	10.4.36.97 – 10.4.36.98	10.4.36.99
26	10.4.36.100/30	10.4.36.101 – 10.4.36.102	10.4.36.103
27	10.4.36.104/30	10.4.36.105 – 10.4.36.106	10.4.36.107
28	10.4.36.108/30	10.4.36.109 – 10.4.36.110	10.4.36.111
29	10.4.36.112/30	10.4.36.113 – 10.4.36.114	10.4.36.115
30	10.4.36.116/30	10.4.36.117 – 10.4.36.118	10.4.36.119
31	10.4.36.120/30	10.4.36.121 – 10.4.36.122	10.4.36.123
32	10.4.36.124/30	10.4.36.125 – 10.4.36.126	10.4.36.127
33	10.4.36.128/30	10.4.36.129 – 10.4.36.130	10.4.36.131
34	10.4.36.132/30	10.4.36.133 – 10.4.36.134	10.4.36.135
35	10.4.36.136/30	10.4.36.137 – 10.4.36.138	10.4.36.139
36	10.4.36.140/30	10.4.36.141 – 10.4.36.142	10.4.36.143
37	10.4.36.144/30	10.4.36.145 – 10.4.36.146	10.4.36.147
38	10.4.36.148/30	10.4.36.149 – 10.4.36.150	10.4.36.151
39	10.4.36.152/30	10.4.36.153 – 10.4.36.154	10.4.36.155
40	10.4.36.156/30	10.4.36.157 – 10.4.36.158	10.4.36.159
41	10.4.36.160/30	10.4.36.161 – 10.4.36.162	10.4.36.163
42	10.4.36.164/30	10.4.36.165 – 10.4.36.166	10.4.36.167
43	10.4.36.168/30	10.4.36.169 – 10.4.36.170	10.4.36.171
44	10.4.36.172/30	10.4.36.173 – 10.4.36.174	10.4.36.175
45	10.4.36.176/30	10.4.36.177 – 10.4.36.178	10.4.36.179
46	10.4.36.180/30	10.4.36.181 – 10.4.36.182	10.4.36.183
47	10.4.36.184/30	10.4.36.185 – 10.4.36.186	10.4.36.187
48	10.4.36.188/30	10.4.36.189 – 10.4.36.190	10.4.36.191
49	10.4.36.192/30	10.4.36.193 – 10.4.36.194	10.4.36.195
50	10.4.36.196/30	10.4.36.197 – 10.4.36.198	10.4.36.199
51	10.4.36.200/30	10.4.36.201 – 10.4.36.202	10.4.36.203
52	10.4.36.204/30	10.4.36.205 – 10.4.36.206	10.4.36.207
53	10.4.36.208/30	10.4.36.209 – 10.4.36.210	10.4.36.211
54	10.4.36.212/30	10.4.36.213 – 10.4.36.214	10.4.36.215
55	10.4.36.216/30	10.4.36.217 – 10.4.36.218	10.4.36.219
56	10.4.36.220/30	10.4.36.221 – 10.4.36.222	10.4.36.223
57	10.4.36.224/30	10.4.36.225 – 10.4.36.226	10.4.36.227
58	10.4.36.228/30	10.4.36.229 – 10.4.36.230	10.4.36.231
59	10.4.36.232/30	10.4.36.233 – 10.4.36.234	10.4.36.235
60	10.4.36.236/30	10.4.36.237 – 10.4.36.238	10.4.36.239
61	10.4.36.240/30	10.4.36.241 – 10.4.36.242	10.4.36.243
62	10.4.36.244/30	10.4.36.245 – 10.4.36.246	10.4.36.247
63	10.4.36.248/30	10.4.36.249 – 10.4.36.250	10.4.36.251
64	10.4.36.252/30	10.4.36.253 – 10.4.36.254	10.4.36.255
65	10.4.37.0/30	10.4.37.1 – 10.4.37.2	10.4.37.3
66	10.4.37.4/30	10.4.37.5 – 10.4.37.6	10.4.37.7
67	10.4.37.8/30	10.4.37.9 – 10.4.37.10	10.4.37.11
68	10.4.37.12/30	10.4.37.13 – 10.4.37.14	10.4.37.15
69	10.4.37.16/30	10.4.37.17 – 10.4.37.18	10.4.37.19
70	10.4.37.20/30	10.4.37.21 – 10.4.37.22	10.4.37.23
71	10.4.37.24/30	10.4.37.25 – 10.4.37.26	10.4.37.27
72	10.4.37.28/30	10.4.37.29 – 10.4.37.30	10.4.37.31
73	10.4.37.32/30	10.4.37.33 – 10.4.37.34	10.4.37.35
74	10.4.37.36/30	10.4.37.37 – 10.4.37.38	10.4.37.39
75	10.4.37.40/30	10.4.37.41 – 10.4.37.42	10.4.37.43
76	10.4.37.44/30	10.4.37.45 – 10.4.37.46	10.4.37.47
77	10.4.37.48/30	10.4.37.49 – 10.4.37.50	10.4.37.51
78	10.4.37.52/30	10.4.37.53 – 10.4.37.54	10.4.37.55
79	10.4.37.56/30	10.4.37.57 – 10.4.37.58	10.4.37.59
80	10.4.37.60/30	10.4.37.61 – 10.4.37.62	10.4.37.63
81	10.4.37.64/30	10.4.37.65 – 10.4.37.66	10.4.37.67
82	10.4.37.68/30	10.4.37.69 – 10.4.37.70	10.4.37.71
83	10.4.37.72/30	10.4.37.73 – 10.4.37.74	10.4.37.75
84	10.4.37.76/30	10.4.37.77 – 10.4.37.78	10.4.37.79
85	10.4.37.80/30	10.4.37.81 – 10.4.37.82	10.4.37.83
86	10.4.37.84/30	10.4.37.85 – 10.4.37.86	10.4.37.87
87	10.4.37.88/30	10.4.37.89 – 10.4.37.90	10.4.37.91
88	10.4.37.92/30	10.4.37.93 – 10.4.37.94	10.4.37.95
89	10.4.37.96/30	10.4.37.97 – 10.4.37.98	10.4.37.99
90	10.4.37.100/30	10.4.37.101 – 10.4.37.102	10.4.37.103
91	10.4.37.104/30	10.4.37.105 – 10.4.37.106	10.4.37.107
92	10.4.37.108/30	10.4.37.109 – 10.4.37.110	10.4.37.111
93	10.4.37.112/30	10.4.37.113 – 10.4.37.114	10.4.37.115
94	10.4.37.116/30	10.4.37.117 – 10.4.37.118	10.4.37.119
95	10.4.37.120/30	10.4.37.121 – 10.4.37.122	10.4.37.123
96	10.4.37.124/30	10.4.37.125 – 10.4.37.126	10.4.37.127
97	10.4.37.128/30	10.4.37.129 – 10.4.37.130	10.4.37.131
98	10.4.37.132/30	10.4.37.133 – 10.4.37.134	10.4.37.135
99	10.4.37.136/30	10.4.37.137 – 10.4.37.138	10.4.37.139
100	10.4.37.140/30	10.4.37.141 – 10.4.37.142	10.4.37.143
101	10.4.37.144/30	10.4.37.145 – 10.4.37.146	10.4.37.147
102	10.4.37.148/30	10.4.37.149 – 10.4.37.150	10.4.37.151
103	10.4.37.152/30	10.4.37.153 – 10.4.37.154	10.4.37.155
104	10.4.37.156/30	10.4.37.157 – 10.4.37.158	10.4.37.159
105	10.4.37.160/30	10.4.37.161 – 10.4.37.162	10.4.37.163
106	10.4.37.164/30	10.4.37.165 – 10.4.37.166	10.4.37.167
107	10.4.37.168/30	10.4.37.169 – 10.4.37.170	10.4.37.171
108	10.4.37.172/30	10.4.37.173 – 10.4.37.174	10.4.37.175
109	10.4.37.176/30	10.4.37.177 – 10.4.37.178	10.4.37.179
110	10.4.37.180/30	10.4.37.181 – 10.4.37.182	10.4.37.183
111	10.4.37.184/30	10.4.37.185 – 10.4.37.186	10.4.37.187
112	10.4.37.188/30	10.4.37.189 – 10.4.37.190	10.4.37.191
113	10.4.37.192/30	10.4.37.193 – 10.4.37.194	10.4.37.195
114	10.4.37.196/30	10.4.37.197 – 10.4.37.198	10.4.37.199
115	10.4.37.200/30	10.4.37.201 – 10.4.37.202	10.4.37.203
116	10.4.37.204/30	10.4.37.205 – 10.4.37.206	10.4.37.207
117	10.4.37.208/30	10.4.37.209 – 10.4.37.210	10.4.37.211
118	10.4.37.212/30	10.4.37.213 – 10.4.37.214	10.4.37.215
119	10.4.37.216/30	10.4.37.217 – 10.4.37.218	10.4.37.219
120	10.4.37.220/30	10.4.37.221 – 10.4.37.222	10.4.37.223
121	10.4.37.224/30	10.4.37.225 – 10.4.37.226	10.4.37.227
122	10.4.37.228/30	10.4.37.229 – 10.4.37.230	10.4.37.231
123	10.4.37.232/30	10.4.37.233 – 10.4.37.234	10.4.37.235
124	10.4.37.236/30	10.4.37.237 – 10.4.37.238	10.4.37.239
125	10.4.37.240/30	10.4.37.241 – 10.4.37.242	10.4.37.243
126	10.4.37.244/30	10.4.37.245 – 10.4.37.246	10.4.37.247
127	10.4.37.248/30	10.4.37.249 – 10.4.37.250	10.4.37.251
128	10.4.37.252/30	10.4.37.253 – 10.4.37.254	10.4.37.255
129	10.4.38.0/30	10.4.38.1 – 10.4.38.2	10.4.38.3
130	10.4.38.4/30	10.4.38.5 – 10.4.38.6	10.4.38.7
131	10.4.38.8/30	10.4.38.9 – 10.4.38.10	10.4.38.11
132	10.4.38.12/30	10.4.38.13 – 10.4.38.14	10.4.38.15
133	10.4.38.16/30	10.4.38.17 – 10.4.38.18	10.4.38.19
134	10.4.38.20/30	10.4.38.21 – 10.4.38.22	10.4.38.23
135	10.4.38.24/30	10.4.38.25 – 10.4.38.26	10.4.38.27
136	10.4.38.28/30	10.4.38.29 – 10.4.38.30	10.4.38.31
137	10.4.38.32/30	10.4.38.33 – 10.4.38.34	10.4.38.35
138	10.4.38.36/30	10.4.38.37 – 10.4.38.38	10.4.38.39
139	10.4.38.40/30	10.4.38.41 – 10.4.38.42	10.4.38.43
140	10.4.38.44/30	10.4.38.45 – 10.4.38.46	10.4.38.47
141	10.4.38.48/30	10.4.38.49 – 10.4.38.50	10.4.38.51
142	10.4.38.52/30	10.4.38.53 – 10.4.38.54	10.4.38.55
143	10.4.38.56/30	10.4.38.57 – 10.4.38.58	10.4.38.59
144	10.4.38.60/30	10.4.38.61 – 10.4.38.62	10.4.38.63
145	10.4.38.64/30	10.4.38.65 – 10.4.38.66	10.4.38.67
146	10.4.38.68/30	10.4.38.69 – 10.4.38.70	10.4.38.71
147	10.4.38.72/30	10.4.38.73 – 10.4.38.74	10.4.38.75
148	10.4.38.76/30	10.4.38.77 – 10.4.38.78	10.4.38.79
149	10.4.38.80/30	10.4.38.81 – 10.4.38.82	10.4.38.83
150	10.4.38.84/30	10.4.38.85 – 10.4.38.86	10.4.38.87
151	10.4.38.88/30	10.4.38.89 – 10.4.38.90	10.4.38.91
152	10.4.38.92/30	10.4.38.93 – 10.4.38.94	10.4.38.95
153	10.4.38.96/30	10.4.38.97 – 10.4.38.98	10.4.38.99
154	10.4.38.100/30	10.4.38.101 – 10.4.38.102	10.4.38.103
155	10.4.38.104/30	10.4.38.105 – 10.4.38.106	10.4.38.107
156	10.4.38.108/30	10.4.38.109 – 10.4.38.110	10.4.38.111
157	10.4.38.112/30	10.4.38.113 – 10.4.38.114	10.4.38.115
158	10.4.38.116/30	10.4.38.117 – 10.4.38.118	10.4.38.119
159	10.4.38.120/30	10.4.38.121 – 10.4.38.122	10.4.38.123
160	10.4.38.124/30	10.4.38.125 – 10.4.38.126	10.4.38.127
161	10.4.38.128/30	10.4.38.129 – 10.4.38.130	10.4.38.131
162	10.4.38.132/30	10.4.38.133 – 10.4.38.134	10.4.38.135
163	10.4.38.136/30	10.4.38.137 – 10.4.38.138	10.4.38.139
164	10.4.38.140/30	10.4.38.141 – 10.4.38.142	10.4.38.143
165	10.4.38.144/30	10.4.38.145 – 10.4.38.146	10.4.38.147
166	10.4.38.148/30	10.4.38.149 – 10.4.38.150	10.4.38.151
167	10.4.38.152/30	10.4.38.153 – 10.4.38.154	10.4.38.155
168	10.4.38.156/30	10.4.38.157 – 10.4.38.158	10.4.38.159
169	10.4.38.160/30	10.4.38.161 – 10.4.38.162	10.4.38.163
170	10.4.38.164/30	10.4.38.165 – 10.4.38.166	10.4.38.167
171	10.4.38.168/30	10.4.38.169 – 10.4.38.170	10.4.38.171
172	10.4.38.172/30	10.4.38.173 – 10.4.38.174	10.4.38.175
173	10.4.38.176/30	10.4.38.177 – 10.4.38.178	10.4.38.179
174	10.4.38.180/30	10.4.38.181 – 10.4.38.182	10.4.38.183
175	10.4.38.184/30	10.4.38.185 – 10.4.38.186	10.4.38.187
176	10.4.38.188/30	10.4.38.189 – 10.4.38.190	10.4.38.191
177	10.4.38.192/30	10.4.38.193 – 10.4.38.194	10.4.38.195
178	10.4.38.196/30	10.4.38.197 – 10.4.38.198	10.4.38.199
179	10.4.38.200/30	10.4.38.201 – 10.4.38.202	10.4.38.203
180	10.4.38.204/30	10.4.38.205 – 10.4.38.206	10.4.38.207
181	10.4.38.208/30	10.4.38.209 – 10.4.38.210	10.4.38.211
182	10.4.38.212/30	10.4.38.213 – 10.4.38.214	10.4.38.215
183	10.4.38.216/30	10.4.38.217 – 10.4.38.218	10.4.38.219
184	10.4.38.220/30	10.4.38.221 – 10.4.38.222	10.4.38.223
185	10.4.38.224/30	10.4.38.225 – 10.4.38.226	10.4.38.227
186	10.4.38.228/30	10.4.38.229 – 10.4.38.230	10.4.38.231
187	10.4.38.232/30	10.4.38.233 – 10.4.38.234	10.4.38.235
188	10.4.38.236/30	10.4.38.237 – 10.4.38.238	10.4.38.239
189	10.4.38.240/30	10.4.38.241 – 10.4.38.242	10.4.38.243
190	10.4.38.244/30	10.4.38.245 – 10.4.38.246	10.4.38.247
191	10.4.38.248/30	10.4.38.249 – 10.4.38.250	10.4.38.251
192	10.4.38.252/30	10.4.38.253 – 10.4.38.254	10.4.38.255
193	10.4.39.0/30	10.4.39.1 – 10.4.39.2	10.4.39.3
194	10.4.39.4/30	10.4.39.5 – 10.4.39.6	10.4.39.7
195	10.4.39.8/30	10.4.39.9 – 10.4.39.10	10.4.39.11
196	10.4.39.12/30	10.4.39.13 – 10.4.39.14	10.4.39.15
197	10.4.39.16/30	10.4.39.17 – 10.4.39.18	10.4.39.19
198	10.4.39.20/30	10.4.39.21 – 10.4.39.22	10.4.39.23
199	10.4.39.24/30	10.4.39.25 – 10.4.39.26	10.4.39.27
200	10.4.39.28/30	10.4.39.29 – 10.4.39.30	10.4.39.31
201	10.4.39.32/30	10.4.39.33 – 10.4.39.34	10.4.39.35
202	10.4.39.36/30	10.4.39.37 – 10.4.39.38	10.4.39.39
203	10.4.39.40/30	10.4.39.41 – 10.4.39.42	10.4.39.43
204	10.4.39.44/30	10.4.39.45 – 10.4.39.46	10.4.39.47
205	10.4.39.48/30	10.4.39.49 – 10.4.39.50	10.4.39.51
206	10.4.39.52/30	10.4.39.53 – 10.4.39.54	10.4.39.55
207	10.4.39.56/30	10.4.39.57 – 10.4.39.58	10.4.39.59
208	10.4.39.60/30	10.4.39.61 – 10.4.39.62	10.4.39.63
209	10.4.39.64/30	10.4.39.65 – 10.4.39.66	10.4.39.67
210	10.4.39.68/30	10.4.39.69 – 10.4.39.70	10.4.39.71
211	10.4.39.72/30	10.4.39.73 – 10.4.39.74	10.4.39.75
212	10.4.39.76/30	10.4.39.77 – 10.4.39.78	10.4.39.79
213	10.4.39.80/30	10.4.39.81 – 10.4.39.82	10.4.39.83
214	10.4.39.84/30	10.4.39.85 – 10.4.39.86	10.4.39.87
215	10.4.39.88/30	10.4.39.89 – 10.4.39.90	10.4.39.91
216	10.4.39.92/30	10.4.39.93 – 10.4.39.94	10.4.39.95
217	10.4.39.96/30	10.4.39.97 – 10.4.39.98	10.4.39.99
218	10.4.39.100/30	10.4.39.101 – 10.4.39.102	10.4.39.103
219	10.4.39.104/30	10.4.39.105 – 10.4.39.106	10.4.39.107
220	10.4.39.108/30	10.4.39.109 – 10.4.39.110	10.4.39.111
221	10.4.39.112/30	10.4.39.113 – 10.4.39.114	10.4.39.115
222	10.4.39.116/30	10.4.39.117 – 10.4.39.118	10.4.39.119
223	10.4.39.120/30	10.4.39.121 – 10.4.39.122	10.4.39.123
224	10.4.39.124/30	10.4.39.125 – 10.4.39.126	10.4.39.127
225	10.4.39.128/30	10.4.39.129 – 10.4.39.130	10.4.39.131
226	10.4.39.132/30	10.4.39.133 – 10.4.39.134	10.4.39.135
227	10.4.39.136/30	10.4.39.137 – 10.4.39.138	10.4.39.139
228	10.4.39.140/30	10.4.39.141 – 10.4.39.142	10.4.39.143
229	10.4.39.144/30	10.4.39.145 – 10.4.39.146	10.4.39.147
230	10.4.39.148/30	10.4.39.149 – 10.4.39.150	10.4.39.151
231	10.4.39.152/30	10.4.39.153 – 10.4.39.154	10.4.39.155
232	10.4.39.156/30	10.4.39.157 – 10.4.39.158	10.4.39.159
233	10.4.39.160/30	10.4.39.161 – 10.4.39.162	10.4.39.163
234	10.4.39.164/30	10.4.39.165 – 10.4.39.166	10.4.39.167
235	10.4.39.168/30	10.4.39.169 – 10.4.39.170	10.4.39.171
236	10.4.39.172/30	10.4.39.173 – 10.4.39.174	10.4.39.175
237	10.4.39.176/30	10.4.39.177 – 10.4.39.178	10.4.39.179
238	10.4.39.180/30	10.4.39.181 – 10.4.39.182	10.4.39.183
239	10.4.39.184/30	10.4.39.185 – 10.4.39.186	10.4.39.187
240	10.4.39.188/30	10.4.39.189 – 10.4.39.190	10.4.39.191
241	10.4.39.192/30	10.4.39.193 – 10.4.39.194	10.4.39.195
242	10.4.39.196/30	10.4.39.197 – 10.4.39.198	10.4.39.199
243	10.4.39.200/30	10.4.39.201 – 10.4.39.202	10.4.39.203
244	10.4.39.204/30	10.4.39.205 – 10.4.39.206	10.4.39.207
245	10.4.39.208/30	10.4.39.209 – 10.4.39.210	10.4.39.211
246	10.4.39.212/30	10.4.39.213 – 10.4.39.214	10.4.39.215
247	10.4.39.216/30	10.4.39.217 – 10.4.39.218	10.4.39.219
248	10.4.39.220/30	10.4.39.221 – 10.4.39.222	10.4.39.223
249	10.4.39.224/30	10.4.39.225 – 10.4.39.226	10.4.39.227
250	10.4.39.228/30	10.4.39.229 – 10.4.39.230	10.4.39.231
251	10.4.39.232/30	10.4.39.233 – 10.4.39.234	10.4.39.235
252	10.4.39.236/30	10.4.39.237 – 10.4.39.238	10.4.39.239
253	10.4.39.240/30	10.4.39.241 – 10.4.39.242	10.4.39.243
254	10.4.39.244/30	10.4.39.245 – 10.4.39.246	10.4.39.247
255	10.4.39.248/30	10.4.39.249 – 10.4.39.250	10.4.39.251
256	10.4.39.252/30	10.4.39.253 – 10.4.39.254	10.4.39.255

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 →