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)10.243.36.0/22

network10.243.36.0/22

broadcast10.243.39.255

first host10.243.36.1

last host10.243.39.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.243.36.0/22

address00001010.11110011.00100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.11110011.00100100.00000000

broadcast00001010.11110011.00100111.11111111

green = network part, grey = host part

hex0x0af32400

decimal183706624

reverse dns0.36.243.10.in-addr.arpa

ipv4-mapped::ffff:af3:2400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.243.36.0/30	10.243.36.1 – 10.243.36.2	10.243.36.3
2	10.243.36.4/30	10.243.36.5 – 10.243.36.6	10.243.36.7
3	10.243.36.8/30	10.243.36.9 – 10.243.36.10	10.243.36.11
4	10.243.36.12/30	10.243.36.13 – 10.243.36.14	10.243.36.15
5	10.243.36.16/30	10.243.36.17 – 10.243.36.18	10.243.36.19
6	10.243.36.20/30	10.243.36.21 – 10.243.36.22	10.243.36.23
7	10.243.36.24/30	10.243.36.25 – 10.243.36.26	10.243.36.27
8	10.243.36.28/30	10.243.36.29 – 10.243.36.30	10.243.36.31
9	10.243.36.32/30	10.243.36.33 – 10.243.36.34	10.243.36.35
10	10.243.36.36/30	10.243.36.37 – 10.243.36.38	10.243.36.39
11	10.243.36.40/30	10.243.36.41 – 10.243.36.42	10.243.36.43
12	10.243.36.44/30	10.243.36.45 – 10.243.36.46	10.243.36.47
13	10.243.36.48/30	10.243.36.49 – 10.243.36.50	10.243.36.51
14	10.243.36.52/30	10.243.36.53 – 10.243.36.54	10.243.36.55
15	10.243.36.56/30	10.243.36.57 – 10.243.36.58	10.243.36.59
16	10.243.36.60/30	10.243.36.61 – 10.243.36.62	10.243.36.63
17	10.243.36.64/30	10.243.36.65 – 10.243.36.66	10.243.36.67
18	10.243.36.68/30	10.243.36.69 – 10.243.36.70	10.243.36.71
19	10.243.36.72/30	10.243.36.73 – 10.243.36.74	10.243.36.75
20	10.243.36.76/30	10.243.36.77 – 10.243.36.78	10.243.36.79
21	10.243.36.80/30	10.243.36.81 – 10.243.36.82	10.243.36.83
22	10.243.36.84/30	10.243.36.85 – 10.243.36.86	10.243.36.87
23	10.243.36.88/30	10.243.36.89 – 10.243.36.90	10.243.36.91
24	10.243.36.92/30	10.243.36.93 – 10.243.36.94	10.243.36.95
25	10.243.36.96/30	10.243.36.97 – 10.243.36.98	10.243.36.99
26	10.243.36.100/30	10.243.36.101 – 10.243.36.102	10.243.36.103
27	10.243.36.104/30	10.243.36.105 – 10.243.36.106	10.243.36.107
28	10.243.36.108/30	10.243.36.109 – 10.243.36.110	10.243.36.111
29	10.243.36.112/30	10.243.36.113 – 10.243.36.114	10.243.36.115
30	10.243.36.116/30	10.243.36.117 – 10.243.36.118	10.243.36.119
31	10.243.36.120/30	10.243.36.121 – 10.243.36.122	10.243.36.123
32	10.243.36.124/30	10.243.36.125 – 10.243.36.126	10.243.36.127
33	10.243.36.128/30	10.243.36.129 – 10.243.36.130	10.243.36.131
34	10.243.36.132/30	10.243.36.133 – 10.243.36.134	10.243.36.135
35	10.243.36.136/30	10.243.36.137 – 10.243.36.138	10.243.36.139
36	10.243.36.140/30	10.243.36.141 – 10.243.36.142	10.243.36.143
37	10.243.36.144/30	10.243.36.145 – 10.243.36.146	10.243.36.147
38	10.243.36.148/30	10.243.36.149 – 10.243.36.150	10.243.36.151
39	10.243.36.152/30	10.243.36.153 – 10.243.36.154	10.243.36.155
40	10.243.36.156/30	10.243.36.157 – 10.243.36.158	10.243.36.159
41	10.243.36.160/30	10.243.36.161 – 10.243.36.162	10.243.36.163
42	10.243.36.164/30	10.243.36.165 – 10.243.36.166	10.243.36.167
43	10.243.36.168/30	10.243.36.169 – 10.243.36.170	10.243.36.171
44	10.243.36.172/30	10.243.36.173 – 10.243.36.174	10.243.36.175
45	10.243.36.176/30	10.243.36.177 – 10.243.36.178	10.243.36.179
46	10.243.36.180/30	10.243.36.181 – 10.243.36.182	10.243.36.183
47	10.243.36.184/30	10.243.36.185 – 10.243.36.186	10.243.36.187
48	10.243.36.188/30	10.243.36.189 – 10.243.36.190	10.243.36.191
49	10.243.36.192/30	10.243.36.193 – 10.243.36.194	10.243.36.195
50	10.243.36.196/30	10.243.36.197 – 10.243.36.198	10.243.36.199
51	10.243.36.200/30	10.243.36.201 – 10.243.36.202	10.243.36.203
52	10.243.36.204/30	10.243.36.205 – 10.243.36.206	10.243.36.207
53	10.243.36.208/30	10.243.36.209 – 10.243.36.210	10.243.36.211
54	10.243.36.212/30	10.243.36.213 – 10.243.36.214	10.243.36.215
55	10.243.36.216/30	10.243.36.217 – 10.243.36.218	10.243.36.219
56	10.243.36.220/30	10.243.36.221 – 10.243.36.222	10.243.36.223
57	10.243.36.224/30	10.243.36.225 – 10.243.36.226	10.243.36.227
58	10.243.36.228/30	10.243.36.229 – 10.243.36.230	10.243.36.231
59	10.243.36.232/30	10.243.36.233 – 10.243.36.234	10.243.36.235
60	10.243.36.236/30	10.243.36.237 – 10.243.36.238	10.243.36.239
61	10.243.36.240/30	10.243.36.241 – 10.243.36.242	10.243.36.243
62	10.243.36.244/30	10.243.36.245 – 10.243.36.246	10.243.36.247
63	10.243.36.248/30	10.243.36.249 – 10.243.36.250	10.243.36.251
64	10.243.36.252/30	10.243.36.253 – 10.243.36.254	10.243.36.255
65	10.243.37.0/30	10.243.37.1 – 10.243.37.2	10.243.37.3
66	10.243.37.4/30	10.243.37.5 – 10.243.37.6	10.243.37.7
67	10.243.37.8/30	10.243.37.9 – 10.243.37.10	10.243.37.11
68	10.243.37.12/30	10.243.37.13 – 10.243.37.14	10.243.37.15
69	10.243.37.16/30	10.243.37.17 – 10.243.37.18	10.243.37.19
70	10.243.37.20/30	10.243.37.21 – 10.243.37.22	10.243.37.23
71	10.243.37.24/30	10.243.37.25 – 10.243.37.26	10.243.37.27
72	10.243.37.28/30	10.243.37.29 – 10.243.37.30	10.243.37.31
73	10.243.37.32/30	10.243.37.33 – 10.243.37.34	10.243.37.35
74	10.243.37.36/30	10.243.37.37 – 10.243.37.38	10.243.37.39
75	10.243.37.40/30	10.243.37.41 – 10.243.37.42	10.243.37.43
76	10.243.37.44/30	10.243.37.45 – 10.243.37.46	10.243.37.47
77	10.243.37.48/30	10.243.37.49 – 10.243.37.50	10.243.37.51
78	10.243.37.52/30	10.243.37.53 – 10.243.37.54	10.243.37.55
79	10.243.37.56/30	10.243.37.57 – 10.243.37.58	10.243.37.59
80	10.243.37.60/30	10.243.37.61 – 10.243.37.62	10.243.37.63
81	10.243.37.64/30	10.243.37.65 – 10.243.37.66	10.243.37.67
82	10.243.37.68/30	10.243.37.69 – 10.243.37.70	10.243.37.71
83	10.243.37.72/30	10.243.37.73 – 10.243.37.74	10.243.37.75
84	10.243.37.76/30	10.243.37.77 – 10.243.37.78	10.243.37.79
85	10.243.37.80/30	10.243.37.81 – 10.243.37.82	10.243.37.83
86	10.243.37.84/30	10.243.37.85 – 10.243.37.86	10.243.37.87
87	10.243.37.88/30	10.243.37.89 – 10.243.37.90	10.243.37.91
88	10.243.37.92/30	10.243.37.93 – 10.243.37.94	10.243.37.95
89	10.243.37.96/30	10.243.37.97 – 10.243.37.98	10.243.37.99
90	10.243.37.100/30	10.243.37.101 – 10.243.37.102	10.243.37.103
91	10.243.37.104/30	10.243.37.105 – 10.243.37.106	10.243.37.107
92	10.243.37.108/30	10.243.37.109 – 10.243.37.110	10.243.37.111
93	10.243.37.112/30	10.243.37.113 – 10.243.37.114	10.243.37.115
94	10.243.37.116/30	10.243.37.117 – 10.243.37.118	10.243.37.119
95	10.243.37.120/30	10.243.37.121 – 10.243.37.122	10.243.37.123
96	10.243.37.124/30	10.243.37.125 – 10.243.37.126	10.243.37.127
97	10.243.37.128/30	10.243.37.129 – 10.243.37.130	10.243.37.131
98	10.243.37.132/30	10.243.37.133 – 10.243.37.134	10.243.37.135
99	10.243.37.136/30	10.243.37.137 – 10.243.37.138	10.243.37.139
100	10.243.37.140/30	10.243.37.141 – 10.243.37.142	10.243.37.143
101	10.243.37.144/30	10.243.37.145 – 10.243.37.146	10.243.37.147
102	10.243.37.148/30	10.243.37.149 – 10.243.37.150	10.243.37.151
103	10.243.37.152/30	10.243.37.153 – 10.243.37.154	10.243.37.155
104	10.243.37.156/30	10.243.37.157 – 10.243.37.158	10.243.37.159
105	10.243.37.160/30	10.243.37.161 – 10.243.37.162	10.243.37.163
106	10.243.37.164/30	10.243.37.165 – 10.243.37.166	10.243.37.167
107	10.243.37.168/30	10.243.37.169 – 10.243.37.170	10.243.37.171
108	10.243.37.172/30	10.243.37.173 – 10.243.37.174	10.243.37.175
109	10.243.37.176/30	10.243.37.177 – 10.243.37.178	10.243.37.179
110	10.243.37.180/30	10.243.37.181 – 10.243.37.182	10.243.37.183
111	10.243.37.184/30	10.243.37.185 – 10.243.37.186	10.243.37.187
112	10.243.37.188/30	10.243.37.189 – 10.243.37.190	10.243.37.191
113	10.243.37.192/30	10.243.37.193 – 10.243.37.194	10.243.37.195
114	10.243.37.196/30	10.243.37.197 – 10.243.37.198	10.243.37.199
115	10.243.37.200/30	10.243.37.201 – 10.243.37.202	10.243.37.203
116	10.243.37.204/30	10.243.37.205 – 10.243.37.206	10.243.37.207
117	10.243.37.208/30	10.243.37.209 – 10.243.37.210	10.243.37.211
118	10.243.37.212/30	10.243.37.213 – 10.243.37.214	10.243.37.215
119	10.243.37.216/30	10.243.37.217 – 10.243.37.218	10.243.37.219
120	10.243.37.220/30	10.243.37.221 – 10.243.37.222	10.243.37.223
121	10.243.37.224/30	10.243.37.225 – 10.243.37.226	10.243.37.227
122	10.243.37.228/30	10.243.37.229 – 10.243.37.230	10.243.37.231
123	10.243.37.232/30	10.243.37.233 – 10.243.37.234	10.243.37.235
124	10.243.37.236/30	10.243.37.237 – 10.243.37.238	10.243.37.239
125	10.243.37.240/30	10.243.37.241 – 10.243.37.242	10.243.37.243
126	10.243.37.244/30	10.243.37.245 – 10.243.37.246	10.243.37.247
127	10.243.37.248/30	10.243.37.249 – 10.243.37.250	10.243.37.251
128	10.243.37.252/30	10.243.37.253 – 10.243.37.254	10.243.37.255
129	10.243.38.0/30	10.243.38.1 – 10.243.38.2	10.243.38.3
130	10.243.38.4/30	10.243.38.5 – 10.243.38.6	10.243.38.7
131	10.243.38.8/30	10.243.38.9 – 10.243.38.10	10.243.38.11
132	10.243.38.12/30	10.243.38.13 – 10.243.38.14	10.243.38.15
133	10.243.38.16/30	10.243.38.17 – 10.243.38.18	10.243.38.19
134	10.243.38.20/30	10.243.38.21 – 10.243.38.22	10.243.38.23
135	10.243.38.24/30	10.243.38.25 – 10.243.38.26	10.243.38.27
136	10.243.38.28/30	10.243.38.29 – 10.243.38.30	10.243.38.31
137	10.243.38.32/30	10.243.38.33 – 10.243.38.34	10.243.38.35
138	10.243.38.36/30	10.243.38.37 – 10.243.38.38	10.243.38.39
139	10.243.38.40/30	10.243.38.41 – 10.243.38.42	10.243.38.43
140	10.243.38.44/30	10.243.38.45 – 10.243.38.46	10.243.38.47
141	10.243.38.48/30	10.243.38.49 – 10.243.38.50	10.243.38.51
142	10.243.38.52/30	10.243.38.53 – 10.243.38.54	10.243.38.55
143	10.243.38.56/30	10.243.38.57 – 10.243.38.58	10.243.38.59
144	10.243.38.60/30	10.243.38.61 – 10.243.38.62	10.243.38.63
145	10.243.38.64/30	10.243.38.65 – 10.243.38.66	10.243.38.67
146	10.243.38.68/30	10.243.38.69 – 10.243.38.70	10.243.38.71
147	10.243.38.72/30	10.243.38.73 – 10.243.38.74	10.243.38.75
148	10.243.38.76/30	10.243.38.77 – 10.243.38.78	10.243.38.79
149	10.243.38.80/30	10.243.38.81 – 10.243.38.82	10.243.38.83
150	10.243.38.84/30	10.243.38.85 – 10.243.38.86	10.243.38.87
151	10.243.38.88/30	10.243.38.89 – 10.243.38.90	10.243.38.91
152	10.243.38.92/30	10.243.38.93 – 10.243.38.94	10.243.38.95
153	10.243.38.96/30	10.243.38.97 – 10.243.38.98	10.243.38.99
154	10.243.38.100/30	10.243.38.101 – 10.243.38.102	10.243.38.103
155	10.243.38.104/30	10.243.38.105 – 10.243.38.106	10.243.38.107
156	10.243.38.108/30	10.243.38.109 – 10.243.38.110	10.243.38.111
157	10.243.38.112/30	10.243.38.113 – 10.243.38.114	10.243.38.115
158	10.243.38.116/30	10.243.38.117 – 10.243.38.118	10.243.38.119
159	10.243.38.120/30	10.243.38.121 – 10.243.38.122	10.243.38.123
160	10.243.38.124/30	10.243.38.125 – 10.243.38.126	10.243.38.127
161	10.243.38.128/30	10.243.38.129 – 10.243.38.130	10.243.38.131
162	10.243.38.132/30	10.243.38.133 – 10.243.38.134	10.243.38.135
163	10.243.38.136/30	10.243.38.137 – 10.243.38.138	10.243.38.139
164	10.243.38.140/30	10.243.38.141 – 10.243.38.142	10.243.38.143
165	10.243.38.144/30	10.243.38.145 – 10.243.38.146	10.243.38.147
166	10.243.38.148/30	10.243.38.149 – 10.243.38.150	10.243.38.151
167	10.243.38.152/30	10.243.38.153 – 10.243.38.154	10.243.38.155
168	10.243.38.156/30	10.243.38.157 – 10.243.38.158	10.243.38.159
169	10.243.38.160/30	10.243.38.161 – 10.243.38.162	10.243.38.163
170	10.243.38.164/30	10.243.38.165 – 10.243.38.166	10.243.38.167
171	10.243.38.168/30	10.243.38.169 – 10.243.38.170	10.243.38.171
172	10.243.38.172/30	10.243.38.173 – 10.243.38.174	10.243.38.175
173	10.243.38.176/30	10.243.38.177 – 10.243.38.178	10.243.38.179
174	10.243.38.180/30	10.243.38.181 – 10.243.38.182	10.243.38.183
175	10.243.38.184/30	10.243.38.185 – 10.243.38.186	10.243.38.187
176	10.243.38.188/30	10.243.38.189 – 10.243.38.190	10.243.38.191
177	10.243.38.192/30	10.243.38.193 – 10.243.38.194	10.243.38.195
178	10.243.38.196/30	10.243.38.197 – 10.243.38.198	10.243.38.199
179	10.243.38.200/30	10.243.38.201 – 10.243.38.202	10.243.38.203
180	10.243.38.204/30	10.243.38.205 – 10.243.38.206	10.243.38.207
181	10.243.38.208/30	10.243.38.209 – 10.243.38.210	10.243.38.211
182	10.243.38.212/30	10.243.38.213 – 10.243.38.214	10.243.38.215
183	10.243.38.216/30	10.243.38.217 – 10.243.38.218	10.243.38.219
184	10.243.38.220/30	10.243.38.221 – 10.243.38.222	10.243.38.223
185	10.243.38.224/30	10.243.38.225 – 10.243.38.226	10.243.38.227
186	10.243.38.228/30	10.243.38.229 – 10.243.38.230	10.243.38.231
187	10.243.38.232/30	10.243.38.233 – 10.243.38.234	10.243.38.235
188	10.243.38.236/30	10.243.38.237 – 10.243.38.238	10.243.38.239
189	10.243.38.240/30	10.243.38.241 – 10.243.38.242	10.243.38.243
190	10.243.38.244/30	10.243.38.245 – 10.243.38.246	10.243.38.247
191	10.243.38.248/30	10.243.38.249 – 10.243.38.250	10.243.38.251
192	10.243.38.252/30	10.243.38.253 – 10.243.38.254	10.243.38.255
193	10.243.39.0/30	10.243.39.1 – 10.243.39.2	10.243.39.3
194	10.243.39.4/30	10.243.39.5 – 10.243.39.6	10.243.39.7
195	10.243.39.8/30	10.243.39.9 – 10.243.39.10	10.243.39.11
196	10.243.39.12/30	10.243.39.13 – 10.243.39.14	10.243.39.15
197	10.243.39.16/30	10.243.39.17 – 10.243.39.18	10.243.39.19
198	10.243.39.20/30	10.243.39.21 – 10.243.39.22	10.243.39.23
199	10.243.39.24/30	10.243.39.25 – 10.243.39.26	10.243.39.27
200	10.243.39.28/30	10.243.39.29 – 10.243.39.30	10.243.39.31
201	10.243.39.32/30	10.243.39.33 – 10.243.39.34	10.243.39.35
202	10.243.39.36/30	10.243.39.37 – 10.243.39.38	10.243.39.39
203	10.243.39.40/30	10.243.39.41 – 10.243.39.42	10.243.39.43
204	10.243.39.44/30	10.243.39.45 – 10.243.39.46	10.243.39.47
205	10.243.39.48/30	10.243.39.49 – 10.243.39.50	10.243.39.51
206	10.243.39.52/30	10.243.39.53 – 10.243.39.54	10.243.39.55
207	10.243.39.56/30	10.243.39.57 – 10.243.39.58	10.243.39.59
208	10.243.39.60/30	10.243.39.61 – 10.243.39.62	10.243.39.63
209	10.243.39.64/30	10.243.39.65 – 10.243.39.66	10.243.39.67
210	10.243.39.68/30	10.243.39.69 – 10.243.39.70	10.243.39.71
211	10.243.39.72/30	10.243.39.73 – 10.243.39.74	10.243.39.75
212	10.243.39.76/30	10.243.39.77 – 10.243.39.78	10.243.39.79
213	10.243.39.80/30	10.243.39.81 – 10.243.39.82	10.243.39.83
214	10.243.39.84/30	10.243.39.85 – 10.243.39.86	10.243.39.87
215	10.243.39.88/30	10.243.39.89 – 10.243.39.90	10.243.39.91
216	10.243.39.92/30	10.243.39.93 – 10.243.39.94	10.243.39.95
217	10.243.39.96/30	10.243.39.97 – 10.243.39.98	10.243.39.99
218	10.243.39.100/30	10.243.39.101 – 10.243.39.102	10.243.39.103
219	10.243.39.104/30	10.243.39.105 – 10.243.39.106	10.243.39.107
220	10.243.39.108/30	10.243.39.109 – 10.243.39.110	10.243.39.111
221	10.243.39.112/30	10.243.39.113 – 10.243.39.114	10.243.39.115
222	10.243.39.116/30	10.243.39.117 – 10.243.39.118	10.243.39.119
223	10.243.39.120/30	10.243.39.121 – 10.243.39.122	10.243.39.123
224	10.243.39.124/30	10.243.39.125 – 10.243.39.126	10.243.39.127
225	10.243.39.128/30	10.243.39.129 – 10.243.39.130	10.243.39.131
226	10.243.39.132/30	10.243.39.133 – 10.243.39.134	10.243.39.135
227	10.243.39.136/30	10.243.39.137 – 10.243.39.138	10.243.39.139
228	10.243.39.140/30	10.243.39.141 – 10.243.39.142	10.243.39.143
229	10.243.39.144/30	10.243.39.145 – 10.243.39.146	10.243.39.147
230	10.243.39.148/30	10.243.39.149 – 10.243.39.150	10.243.39.151
231	10.243.39.152/30	10.243.39.153 – 10.243.39.154	10.243.39.155
232	10.243.39.156/30	10.243.39.157 – 10.243.39.158	10.243.39.159
233	10.243.39.160/30	10.243.39.161 – 10.243.39.162	10.243.39.163
234	10.243.39.164/30	10.243.39.165 – 10.243.39.166	10.243.39.167
235	10.243.39.168/30	10.243.39.169 – 10.243.39.170	10.243.39.171
236	10.243.39.172/30	10.243.39.173 – 10.243.39.174	10.243.39.175
237	10.243.39.176/30	10.243.39.177 – 10.243.39.178	10.243.39.179
238	10.243.39.180/30	10.243.39.181 – 10.243.39.182	10.243.39.183
239	10.243.39.184/30	10.243.39.185 – 10.243.39.186	10.243.39.187
240	10.243.39.188/30	10.243.39.189 – 10.243.39.190	10.243.39.191
241	10.243.39.192/30	10.243.39.193 – 10.243.39.194	10.243.39.195
242	10.243.39.196/30	10.243.39.197 – 10.243.39.198	10.243.39.199
243	10.243.39.200/30	10.243.39.201 – 10.243.39.202	10.243.39.203
244	10.243.39.204/30	10.243.39.205 – 10.243.39.206	10.243.39.207
245	10.243.39.208/30	10.243.39.209 – 10.243.39.210	10.243.39.211
246	10.243.39.212/30	10.243.39.213 – 10.243.39.214	10.243.39.215
247	10.243.39.216/30	10.243.39.217 – 10.243.39.218	10.243.39.219
248	10.243.39.220/30	10.243.39.221 – 10.243.39.222	10.243.39.223
249	10.243.39.224/30	10.243.39.225 – 10.243.39.226	10.243.39.227
250	10.243.39.228/30	10.243.39.229 – 10.243.39.230	10.243.39.231
251	10.243.39.232/30	10.243.39.233 – 10.243.39.234	10.243.39.235
252	10.243.39.236/30	10.243.39.237 – 10.243.39.238	10.243.39.239
253	10.243.39.240/30	10.243.39.241 – 10.243.39.242	10.243.39.243
254	10.243.39.244/30	10.243.39.245 – 10.243.39.246	10.243.39.247
255	10.243.39.248/30	10.243.39.249 – 10.243.39.250	10.243.39.251
256	10.243.39.252/30	10.243.39.253 – 10.243.39.254	10.243.39.255

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 →