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)10.71.84.0/22

network10.71.84.0/22

broadcast10.71.87.255

first host10.71.84.1

last host10.71.87.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.84.0/22

address00001010.01000111.01010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.01010100.00000000

broadcast00001010.01000111.01010111.11111111

green = network part, grey = host part

hex0x0a475400

decimal172446720

reverse dns0.84.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:5400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.84.0/30	10.71.84.1 – 10.71.84.2	10.71.84.3
2	10.71.84.4/30	10.71.84.5 – 10.71.84.6	10.71.84.7
3	10.71.84.8/30	10.71.84.9 – 10.71.84.10	10.71.84.11
4	10.71.84.12/30	10.71.84.13 – 10.71.84.14	10.71.84.15
5	10.71.84.16/30	10.71.84.17 – 10.71.84.18	10.71.84.19
6	10.71.84.20/30	10.71.84.21 – 10.71.84.22	10.71.84.23
7	10.71.84.24/30	10.71.84.25 – 10.71.84.26	10.71.84.27
8	10.71.84.28/30	10.71.84.29 – 10.71.84.30	10.71.84.31
9	10.71.84.32/30	10.71.84.33 – 10.71.84.34	10.71.84.35
10	10.71.84.36/30	10.71.84.37 – 10.71.84.38	10.71.84.39
11	10.71.84.40/30	10.71.84.41 – 10.71.84.42	10.71.84.43
12	10.71.84.44/30	10.71.84.45 – 10.71.84.46	10.71.84.47
13	10.71.84.48/30	10.71.84.49 – 10.71.84.50	10.71.84.51
14	10.71.84.52/30	10.71.84.53 – 10.71.84.54	10.71.84.55
15	10.71.84.56/30	10.71.84.57 – 10.71.84.58	10.71.84.59
16	10.71.84.60/30	10.71.84.61 – 10.71.84.62	10.71.84.63
17	10.71.84.64/30	10.71.84.65 – 10.71.84.66	10.71.84.67
18	10.71.84.68/30	10.71.84.69 – 10.71.84.70	10.71.84.71
19	10.71.84.72/30	10.71.84.73 – 10.71.84.74	10.71.84.75
20	10.71.84.76/30	10.71.84.77 – 10.71.84.78	10.71.84.79
21	10.71.84.80/30	10.71.84.81 – 10.71.84.82	10.71.84.83
22	10.71.84.84/30	10.71.84.85 – 10.71.84.86	10.71.84.87
23	10.71.84.88/30	10.71.84.89 – 10.71.84.90	10.71.84.91
24	10.71.84.92/30	10.71.84.93 – 10.71.84.94	10.71.84.95
25	10.71.84.96/30	10.71.84.97 – 10.71.84.98	10.71.84.99
26	10.71.84.100/30	10.71.84.101 – 10.71.84.102	10.71.84.103
27	10.71.84.104/30	10.71.84.105 – 10.71.84.106	10.71.84.107
28	10.71.84.108/30	10.71.84.109 – 10.71.84.110	10.71.84.111
29	10.71.84.112/30	10.71.84.113 – 10.71.84.114	10.71.84.115
30	10.71.84.116/30	10.71.84.117 – 10.71.84.118	10.71.84.119
31	10.71.84.120/30	10.71.84.121 – 10.71.84.122	10.71.84.123
32	10.71.84.124/30	10.71.84.125 – 10.71.84.126	10.71.84.127
33	10.71.84.128/30	10.71.84.129 – 10.71.84.130	10.71.84.131
34	10.71.84.132/30	10.71.84.133 – 10.71.84.134	10.71.84.135
35	10.71.84.136/30	10.71.84.137 – 10.71.84.138	10.71.84.139
36	10.71.84.140/30	10.71.84.141 – 10.71.84.142	10.71.84.143
37	10.71.84.144/30	10.71.84.145 – 10.71.84.146	10.71.84.147
38	10.71.84.148/30	10.71.84.149 – 10.71.84.150	10.71.84.151
39	10.71.84.152/30	10.71.84.153 – 10.71.84.154	10.71.84.155
40	10.71.84.156/30	10.71.84.157 – 10.71.84.158	10.71.84.159
41	10.71.84.160/30	10.71.84.161 – 10.71.84.162	10.71.84.163
42	10.71.84.164/30	10.71.84.165 – 10.71.84.166	10.71.84.167
43	10.71.84.168/30	10.71.84.169 – 10.71.84.170	10.71.84.171
44	10.71.84.172/30	10.71.84.173 – 10.71.84.174	10.71.84.175
45	10.71.84.176/30	10.71.84.177 – 10.71.84.178	10.71.84.179
46	10.71.84.180/30	10.71.84.181 – 10.71.84.182	10.71.84.183
47	10.71.84.184/30	10.71.84.185 – 10.71.84.186	10.71.84.187
48	10.71.84.188/30	10.71.84.189 – 10.71.84.190	10.71.84.191
49	10.71.84.192/30	10.71.84.193 – 10.71.84.194	10.71.84.195
50	10.71.84.196/30	10.71.84.197 – 10.71.84.198	10.71.84.199
51	10.71.84.200/30	10.71.84.201 – 10.71.84.202	10.71.84.203
52	10.71.84.204/30	10.71.84.205 – 10.71.84.206	10.71.84.207
53	10.71.84.208/30	10.71.84.209 – 10.71.84.210	10.71.84.211
54	10.71.84.212/30	10.71.84.213 – 10.71.84.214	10.71.84.215
55	10.71.84.216/30	10.71.84.217 – 10.71.84.218	10.71.84.219
56	10.71.84.220/30	10.71.84.221 – 10.71.84.222	10.71.84.223
57	10.71.84.224/30	10.71.84.225 – 10.71.84.226	10.71.84.227
58	10.71.84.228/30	10.71.84.229 – 10.71.84.230	10.71.84.231
59	10.71.84.232/30	10.71.84.233 – 10.71.84.234	10.71.84.235
60	10.71.84.236/30	10.71.84.237 – 10.71.84.238	10.71.84.239
61	10.71.84.240/30	10.71.84.241 – 10.71.84.242	10.71.84.243
62	10.71.84.244/30	10.71.84.245 – 10.71.84.246	10.71.84.247
63	10.71.84.248/30	10.71.84.249 – 10.71.84.250	10.71.84.251
64	10.71.84.252/30	10.71.84.253 – 10.71.84.254	10.71.84.255
65	10.71.85.0/30	10.71.85.1 – 10.71.85.2	10.71.85.3
66	10.71.85.4/30	10.71.85.5 – 10.71.85.6	10.71.85.7
67	10.71.85.8/30	10.71.85.9 – 10.71.85.10	10.71.85.11
68	10.71.85.12/30	10.71.85.13 – 10.71.85.14	10.71.85.15
69	10.71.85.16/30	10.71.85.17 – 10.71.85.18	10.71.85.19
70	10.71.85.20/30	10.71.85.21 – 10.71.85.22	10.71.85.23
71	10.71.85.24/30	10.71.85.25 – 10.71.85.26	10.71.85.27
72	10.71.85.28/30	10.71.85.29 – 10.71.85.30	10.71.85.31
73	10.71.85.32/30	10.71.85.33 – 10.71.85.34	10.71.85.35
74	10.71.85.36/30	10.71.85.37 – 10.71.85.38	10.71.85.39
75	10.71.85.40/30	10.71.85.41 – 10.71.85.42	10.71.85.43
76	10.71.85.44/30	10.71.85.45 – 10.71.85.46	10.71.85.47
77	10.71.85.48/30	10.71.85.49 – 10.71.85.50	10.71.85.51
78	10.71.85.52/30	10.71.85.53 – 10.71.85.54	10.71.85.55
79	10.71.85.56/30	10.71.85.57 – 10.71.85.58	10.71.85.59
80	10.71.85.60/30	10.71.85.61 – 10.71.85.62	10.71.85.63
81	10.71.85.64/30	10.71.85.65 – 10.71.85.66	10.71.85.67
82	10.71.85.68/30	10.71.85.69 – 10.71.85.70	10.71.85.71
83	10.71.85.72/30	10.71.85.73 – 10.71.85.74	10.71.85.75
84	10.71.85.76/30	10.71.85.77 – 10.71.85.78	10.71.85.79
85	10.71.85.80/30	10.71.85.81 – 10.71.85.82	10.71.85.83
86	10.71.85.84/30	10.71.85.85 – 10.71.85.86	10.71.85.87
87	10.71.85.88/30	10.71.85.89 – 10.71.85.90	10.71.85.91
88	10.71.85.92/30	10.71.85.93 – 10.71.85.94	10.71.85.95
89	10.71.85.96/30	10.71.85.97 – 10.71.85.98	10.71.85.99
90	10.71.85.100/30	10.71.85.101 – 10.71.85.102	10.71.85.103
91	10.71.85.104/30	10.71.85.105 – 10.71.85.106	10.71.85.107
92	10.71.85.108/30	10.71.85.109 – 10.71.85.110	10.71.85.111
93	10.71.85.112/30	10.71.85.113 – 10.71.85.114	10.71.85.115
94	10.71.85.116/30	10.71.85.117 – 10.71.85.118	10.71.85.119
95	10.71.85.120/30	10.71.85.121 – 10.71.85.122	10.71.85.123
96	10.71.85.124/30	10.71.85.125 – 10.71.85.126	10.71.85.127
97	10.71.85.128/30	10.71.85.129 – 10.71.85.130	10.71.85.131
98	10.71.85.132/30	10.71.85.133 – 10.71.85.134	10.71.85.135
99	10.71.85.136/30	10.71.85.137 – 10.71.85.138	10.71.85.139
100	10.71.85.140/30	10.71.85.141 – 10.71.85.142	10.71.85.143
101	10.71.85.144/30	10.71.85.145 – 10.71.85.146	10.71.85.147
102	10.71.85.148/30	10.71.85.149 – 10.71.85.150	10.71.85.151
103	10.71.85.152/30	10.71.85.153 – 10.71.85.154	10.71.85.155
104	10.71.85.156/30	10.71.85.157 – 10.71.85.158	10.71.85.159
105	10.71.85.160/30	10.71.85.161 – 10.71.85.162	10.71.85.163
106	10.71.85.164/30	10.71.85.165 – 10.71.85.166	10.71.85.167
107	10.71.85.168/30	10.71.85.169 – 10.71.85.170	10.71.85.171
108	10.71.85.172/30	10.71.85.173 – 10.71.85.174	10.71.85.175
109	10.71.85.176/30	10.71.85.177 – 10.71.85.178	10.71.85.179
110	10.71.85.180/30	10.71.85.181 – 10.71.85.182	10.71.85.183
111	10.71.85.184/30	10.71.85.185 – 10.71.85.186	10.71.85.187
112	10.71.85.188/30	10.71.85.189 – 10.71.85.190	10.71.85.191
113	10.71.85.192/30	10.71.85.193 – 10.71.85.194	10.71.85.195
114	10.71.85.196/30	10.71.85.197 – 10.71.85.198	10.71.85.199
115	10.71.85.200/30	10.71.85.201 – 10.71.85.202	10.71.85.203
116	10.71.85.204/30	10.71.85.205 – 10.71.85.206	10.71.85.207
117	10.71.85.208/30	10.71.85.209 – 10.71.85.210	10.71.85.211
118	10.71.85.212/30	10.71.85.213 – 10.71.85.214	10.71.85.215
119	10.71.85.216/30	10.71.85.217 – 10.71.85.218	10.71.85.219
120	10.71.85.220/30	10.71.85.221 – 10.71.85.222	10.71.85.223
121	10.71.85.224/30	10.71.85.225 – 10.71.85.226	10.71.85.227
122	10.71.85.228/30	10.71.85.229 – 10.71.85.230	10.71.85.231
123	10.71.85.232/30	10.71.85.233 – 10.71.85.234	10.71.85.235
124	10.71.85.236/30	10.71.85.237 – 10.71.85.238	10.71.85.239
125	10.71.85.240/30	10.71.85.241 – 10.71.85.242	10.71.85.243
126	10.71.85.244/30	10.71.85.245 – 10.71.85.246	10.71.85.247
127	10.71.85.248/30	10.71.85.249 – 10.71.85.250	10.71.85.251
128	10.71.85.252/30	10.71.85.253 – 10.71.85.254	10.71.85.255
129	10.71.86.0/30	10.71.86.1 – 10.71.86.2	10.71.86.3
130	10.71.86.4/30	10.71.86.5 – 10.71.86.6	10.71.86.7
131	10.71.86.8/30	10.71.86.9 – 10.71.86.10	10.71.86.11
132	10.71.86.12/30	10.71.86.13 – 10.71.86.14	10.71.86.15
133	10.71.86.16/30	10.71.86.17 – 10.71.86.18	10.71.86.19
134	10.71.86.20/30	10.71.86.21 – 10.71.86.22	10.71.86.23
135	10.71.86.24/30	10.71.86.25 – 10.71.86.26	10.71.86.27
136	10.71.86.28/30	10.71.86.29 – 10.71.86.30	10.71.86.31
137	10.71.86.32/30	10.71.86.33 – 10.71.86.34	10.71.86.35
138	10.71.86.36/30	10.71.86.37 – 10.71.86.38	10.71.86.39
139	10.71.86.40/30	10.71.86.41 – 10.71.86.42	10.71.86.43
140	10.71.86.44/30	10.71.86.45 – 10.71.86.46	10.71.86.47
141	10.71.86.48/30	10.71.86.49 – 10.71.86.50	10.71.86.51
142	10.71.86.52/30	10.71.86.53 – 10.71.86.54	10.71.86.55
143	10.71.86.56/30	10.71.86.57 – 10.71.86.58	10.71.86.59
144	10.71.86.60/30	10.71.86.61 – 10.71.86.62	10.71.86.63
145	10.71.86.64/30	10.71.86.65 – 10.71.86.66	10.71.86.67
146	10.71.86.68/30	10.71.86.69 – 10.71.86.70	10.71.86.71
147	10.71.86.72/30	10.71.86.73 – 10.71.86.74	10.71.86.75
148	10.71.86.76/30	10.71.86.77 – 10.71.86.78	10.71.86.79
149	10.71.86.80/30	10.71.86.81 – 10.71.86.82	10.71.86.83
150	10.71.86.84/30	10.71.86.85 – 10.71.86.86	10.71.86.87
151	10.71.86.88/30	10.71.86.89 – 10.71.86.90	10.71.86.91
152	10.71.86.92/30	10.71.86.93 – 10.71.86.94	10.71.86.95
153	10.71.86.96/30	10.71.86.97 – 10.71.86.98	10.71.86.99
154	10.71.86.100/30	10.71.86.101 – 10.71.86.102	10.71.86.103
155	10.71.86.104/30	10.71.86.105 – 10.71.86.106	10.71.86.107
156	10.71.86.108/30	10.71.86.109 – 10.71.86.110	10.71.86.111
157	10.71.86.112/30	10.71.86.113 – 10.71.86.114	10.71.86.115
158	10.71.86.116/30	10.71.86.117 – 10.71.86.118	10.71.86.119
159	10.71.86.120/30	10.71.86.121 – 10.71.86.122	10.71.86.123
160	10.71.86.124/30	10.71.86.125 – 10.71.86.126	10.71.86.127
161	10.71.86.128/30	10.71.86.129 – 10.71.86.130	10.71.86.131
162	10.71.86.132/30	10.71.86.133 – 10.71.86.134	10.71.86.135
163	10.71.86.136/30	10.71.86.137 – 10.71.86.138	10.71.86.139
164	10.71.86.140/30	10.71.86.141 – 10.71.86.142	10.71.86.143
165	10.71.86.144/30	10.71.86.145 – 10.71.86.146	10.71.86.147
166	10.71.86.148/30	10.71.86.149 – 10.71.86.150	10.71.86.151
167	10.71.86.152/30	10.71.86.153 – 10.71.86.154	10.71.86.155
168	10.71.86.156/30	10.71.86.157 – 10.71.86.158	10.71.86.159
169	10.71.86.160/30	10.71.86.161 – 10.71.86.162	10.71.86.163
170	10.71.86.164/30	10.71.86.165 – 10.71.86.166	10.71.86.167
171	10.71.86.168/30	10.71.86.169 – 10.71.86.170	10.71.86.171
172	10.71.86.172/30	10.71.86.173 – 10.71.86.174	10.71.86.175
173	10.71.86.176/30	10.71.86.177 – 10.71.86.178	10.71.86.179
174	10.71.86.180/30	10.71.86.181 – 10.71.86.182	10.71.86.183
175	10.71.86.184/30	10.71.86.185 – 10.71.86.186	10.71.86.187
176	10.71.86.188/30	10.71.86.189 – 10.71.86.190	10.71.86.191
177	10.71.86.192/30	10.71.86.193 – 10.71.86.194	10.71.86.195
178	10.71.86.196/30	10.71.86.197 – 10.71.86.198	10.71.86.199
179	10.71.86.200/30	10.71.86.201 – 10.71.86.202	10.71.86.203
180	10.71.86.204/30	10.71.86.205 – 10.71.86.206	10.71.86.207
181	10.71.86.208/30	10.71.86.209 – 10.71.86.210	10.71.86.211
182	10.71.86.212/30	10.71.86.213 – 10.71.86.214	10.71.86.215
183	10.71.86.216/30	10.71.86.217 – 10.71.86.218	10.71.86.219
184	10.71.86.220/30	10.71.86.221 – 10.71.86.222	10.71.86.223
185	10.71.86.224/30	10.71.86.225 – 10.71.86.226	10.71.86.227
186	10.71.86.228/30	10.71.86.229 – 10.71.86.230	10.71.86.231
187	10.71.86.232/30	10.71.86.233 – 10.71.86.234	10.71.86.235
188	10.71.86.236/30	10.71.86.237 – 10.71.86.238	10.71.86.239
189	10.71.86.240/30	10.71.86.241 – 10.71.86.242	10.71.86.243
190	10.71.86.244/30	10.71.86.245 – 10.71.86.246	10.71.86.247
191	10.71.86.248/30	10.71.86.249 – 10.71.86.250	10.71.86.251
192	10.71.86.252/30	10.71.86.253 – 10.71.86.254	10.71.86.255
193	10.71.87.0/30	10.71.87.1 – 10.71.87.2	10.71.87.3
194	10.71.87.4/30	10.71.87.5 – 10.71.87.6	10.71.87.7
195	10.71.87.8/30	10.71.87.9 – 10.71.87.10	10.71.87.11
196	10.71.87.12/30	10.71.87.13 – 10.71.87.14	10.71.87.15
197	10.71.87.16/30	10.71.87.17 – 10.71.87.18	10.71.87.19
198	10.71.87.20/30	10.71.87.21 – 10.71.87.22	10.71.87.23
199	10.71.87.24/30	10.71.87.25 – 10.71.87.26	10.71.87.27
200	10.71.87.28/30	10.71.87.29 – 10.71.87.30	10.71.87.31
201	10.71.87.32/30	10.71.87.33 – 10.71.87.34	10.71.87.35
202	10.71.87.36/30	10.71.87.37 – 10.71.87.38	10.71.87.39
203	10.71.87.40/30	10.71.87.41 – 10.71.87.42	10.71.87.43
204	10.71.87.44/30	10.71.87.45 – 10.71.87.46	10.71.87.47
205	10.71.87.48/30	10.71.87.49 – 10.71.87.50	10.71.87.51
206	10.71.87.52/30	10.71.87.53 – 10.71.87.54	10.71.87.55
207	10.71.87.56/30	10.71.87.57 – 10.71.87.58	10.71.87.59
208	10.71.87.60/30	10.71.87.61 – 10.71.87.62	10.71.87.63
209	10.71.87.64/30	10.71.87.65 – 10.71.87.66	10.71.87.67
210	10.71.87.68/30	10.71.87.69 – 10.71.87.70	10.71.87.71
211	10.71.87.72/30	10.71.87.73 – 10.71.87.74	10.71.87.75
212	10.71.87.76/30	10.71.87.77 – 10.71.87.78	10.71.87.79
213	10.71.87.80/30	10.71.87.81 – 10.71.87.82	10.71.87.83
214	10.71.87.84/30	10.71.87.85 – 10.71.87.86	10.71.87.87
215	10.71.87.88/30	10.71.87.89 – 10.71.87.90	10.71.87.91
216	10.71.87.92/30	10.71.87.93 – 10.71.87.94	10.71.87.95
217	10.71.87.96/30	10.71.87.97 – 10.71.87.98	10.71.87.99
218	10.71.87.100/30	10.71.87.101 – 10.71.87.102	10.71.87.103
219	10.71.87.104/30	10.71.87.105 – 10.71.87.106	10.71.87.107
220	10.71.87.108/30	10.71.87.109 – 10.71.87.110	10.71.87.111
221	10.71.87.112/30	10.71.87.113 – 10.71.87.114	10.71.87.115
222	10.71.87.116/30	10.71.87.117 – 10.71.87.118	10.71.87.119
223	10.71.87.120/30	10.71.87.121 – 10.71.87.122	10.71.87.123
224	10.71.87.124/30	10.71.87.125 – 10.71.87.126	10.71.87.127
225	10.71.87.128/30	10.71.87.129 – 10.71.87.130	10.71.87.131
226	10.71.87.132/30	10.71.87.133 – 10.71.87.134	10.71.87.135
227	10.71.87.136/30	10.71.87.137 – 10.71.87.138	10.71.87.139
228	10.71.87.140/30	10.71.87.141 – 10.71.87.142	10.71.87.143
229	10.71.87.144/30	10.71.87.145 – 10.71.87.146	10.71.87.147
230	10.71.87.148/30	10.71.87.149 – 10.71.87.150	10.71.87.151
231	10.71.87.152/30	10.71.87.153 – 10.71.87.154	10.71.87.155
232	10.71.87.156/30	10.71.87.157 – 10.71.87.158	10.71.87.159
233	10.71.87.160/30	10.71.87.161 – 10.71.87.162	10.71.87.163
234	10.71.87.164/30	10.71.87.165 – 10.71.87.166	10.71.87.167
235	10.71.87.168/30	10.71.87.169 – 10.71.87.170	10.71.87.171
236	10.71.87.172/30	10.71.87.173 – 10.71.87.174	10.71.87.175
237	10.71.87.176/30	10.71.87.177 – 10.71.87.178	10.71.87.179
238	10.71.87.180/30	10.71.87.181 – 10.71.87.182	10.71.87.183
239	10.71.87.184/30	10.71.87.185 – 10.71.87.186	10.71.87.187
240	10.71.87.188/30	10.71.87.189 – 10.71.87.190	10.71.87.191
241	10.71.87.192/30	10.71.87.193 – 10.71.87.194	10.71.87.195
242	10.71.87.196/30	10.71.87.197 – 10.71.87.198	10.71.87.199
243	10.71.87.200/30	10.71.87.201 – 10.71.87.202	10.71.87.203
244	10.71.87.204/30	10.71.87.205 – 10.71.87.206	10.71.87.207
245	10.71.87.208/30	10.71.87.209 – 10.71.87.210	10.71.87.211
246	10.71.87.212/30	10.71.87.213 – 10.71.87.214	10.71.87.215
247	10.71.87.216/30	10.71.87.217 – 10.71.87.218	10.71.87.219
248	10.71.87.220/30	10.71.87.221 – 10.71.87.222	10.71.87.223
249	10.71.87.224/30	10.71.87.225 – 10.71.87.226	10.71.87.227
250	10.71.87.228/30	10.71.87.229 – 10.71.87.230	10.71.87.231
251	10.71.87.232/30	10.71.87.233 – 10.71.87.234	10.71.87.235
252	10.71.87.236/30	10.71.87.237 – 10.71.87.238	10.71.87.239
253	10.71.87.240/30	10.71.87.241 – 10.71.87.242	10.71.87.243
254	10.71.87.244/30	10.71.87.245 – 10.71.87.246	10.71.87.247
255	10.71.87.248/30	10.71.87.249 – 10.71.87.250	10.71.87.251
256	10.71.87.252/30	10.71.87.253 – 10.71.87.254	10.71.87.255

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 →