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)10.71.60.0/22

network10.71.60.0/22

broadcast10.71.63.255

first host10.71.60.1

last host10.71.63.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.60.0/22

address00001010.01000111.00111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.00111100.00000000

broadcast00001010.01000111.00111111.11111111

green = network part, grey = host part

hex0x0a473c00

decimal172440576

reverse dns0.60.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:3c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.60.0/30	10.71.60.1 – 10.71.60.2	10.71.60.3
2	10.71.60.4/30	10.71.60.5 – 10.71.60.6	10.71.60.7
3	10.71.60.8/30	10.71.60.9 – 10.71.60.10	10.71.60.11
4	10.71.60.12/30	10.71.60.13 – 10.71.60.14	10.71.60.15
5	10.71.60.16/30	10.71.60.17 – 10.71.60.18	10.71.60.19
6	10.71.60.20/30	10.71.60.21 – 10.71.60.22	10.71.60.23
7	10.71.60.24/30	10.71.60.25 – 10.71.60.26	10.71.60.27
8	10.71.60.28/30	10.71.60.29 – 10.71.60.30	10.71.60.31
9	10.71.60.32/30	10.71.60.33 – 10.71.60.34	10.71.60.35
10	10.71.60.36/30	10.71.60.37 – 10.71.60.38	10.71.60.39
11	10.71.60.40/30	10.71.60.41 – 10.71.60.42	10.71.60.43
12	10.71.60.44/30	10.71.60.45 – 10.71.60.46	10.71.60.47
13	10.71.60.48/30	10.71.60.49 – 10.71.60.50	10.71.60.51
14	10.71.60.52/30	10.71.60.53 – 10.71.60.54	10.71.60.55
15	10.71.60.56/30	10.71.60.57 – 10.71.60.58	10.71.60.59
16	10.71.60.60/30	10.71.60.61 – 10.71.60.62	10.71.60.63
17	10.71.60.64/30	10.71.60.65 – 10.71.60.66	10.71.60.67
18	10.71.60.68/30	10.71.60.69 – 10.71.60.70	10.71.60.71
19	10.71.60.72/30	10.71.60.73 – 10.71.60.74	10.71.60.75
20	10.71.60.76/30	10.71.60.77 – 10.71.60.78	10.71.60.79
21	10.71.60.80/30	10.71.60.81 – 10.71.60.82	10.71.60.83
22	10.71.60.84/30	10.71.60.85 – 10.71.60.86	10.71.60.87
23	10.71.60.88/30	10.71.60.89 – 10.71.60.90	10.71.60.91
24	10.71.60.92/30	10.71.60.93 – 10.71.60.94	10.71.60.95
25	10.71.60.96/30	10.71.60.97 – 10.71.60.98	10.71.60.99
26	10.71.60.100/30	10.71.60.101 – 10.71.60.102	10.71.60.103
27	10.71.60.104/30	10.71.60.105 – 10.71.60.106	10.71.60.107
28	10.71.60.108/30	10.71.60.109 – 10.71.60.110	10.71.60.111
29	10.71.60.112/30	10.71.60.113 – 10.71.60.114	10.71.60.115
30	10.71.60.116/30	10.71.60.117 – 10.71.60.118	10.71.60.119
31	10.71.60.120/30	10.71.60.121 – 10.71.60.122	10.71.60.123
32	10.71.60.124/30	10.71.60.125 – 10.71.60.126	10.71.60.127
33	10.71.60.128/30	10.71.60.129 – 10.71.60.130	10.71.60.131
34	10.71.60.132/30	10.71.60.133 – 10.71.60.134	10.71.60.135
35	10.71.60.136/30	10.71.60.137 – 10.71.60.138	10.71.60.139
36	10.71.60.140/30	10.71.60.141 – 10.71.60.142	10.71.60.143
37	10.71.60.144/30	10.71.60.145 – 10.71.60.146	10.71.60.147
38	10.71.60.148/30	10.71.60.149 – 10.71.60.150	10.71.60.151
39	10.71.60.152/30	10.71.60.153 – 10.71.60.154	10.71.60.155
40	10.71.60.156/30	10.71.60.157 – 10.71.60.158	10.71.60.159
41	10.71.60.160/30	10.71.60.161 – 10.71.60.162	10.71.60.163
42	10.71.60.164/30	10.71.60.165 – 10.71.60.166	10.71.60.167
43	10.71.60.168/30	10.71.60.169 – 10.71.60.170	10.71.60.171
44	10.71.60.172/30	10.71.60.173 – 10.71.60.174	10.71.60.175
45	10.71.60.176/30	10.71.60.177 – 10.71.60.178	10.71.60.179
46	10.71.60.180/30	10.71.60.181 – 10.71.60.182	10.71.60.183
47	10.71.60.184/30	10.71.60.185 – 10.71.60.186	10.71.60.187
48	10.71.60.188/30	10.71.60.189 – 10.71.60.190	10.71.60.191
49	10.71.60.192/30	10.71.60.193 – 10.71.60.194	10.71.60.195
50	10.71.60.196/30	10.71.60.197 – 10.71.60.198	10.71.60.199
51	10.71.60.200/30	10.71.60.201 – 10.71.60.202	10.71.60.203
52	10.71.60.204/30	10.71.60.205 – 10.71.60.206	10.71.60.207
53	10.71.60.208/30	10.71.60.209 – 10.71.60.210	10.71.60.211
54	10.71.60.212/30	10.71.60.213 – 10.71.60.214	10.71.60.215
55	10.71.60.216/30	10.71.60.217 – 10.71.60.218	10.71.60.219
56	10.71.60.220/30	10.71.60.221 – 10.71.60.222	10.71.60.223
57	10.71.60.224/30	10.71.60.225 – 10.71.60.226	10.71.60.227
58	10.71.60.228/30	10.71.60.229 – 10.71.60.230	10.71.60.231
59	10.71.60.232/30	10.71.60.233 – 10.71.60.234	10.71.60.235
60	10.71.60.236/30	10.71.60.237 – 10.71.60.238	10.71.60.239
61	10.71.60.240/30	10.71.60.241 – 10.71.60.242	10.71.60.243
62	10.71.60.244/30	10.71.60.245 – 10.71.60.246	10.71.60.247
63	10.71.60.248/30	10.71.60.249 – 10.71.60.250	10.71.60.251
64	10.71.60.252/30	10.71.60.253 – 10.71.60.254	10.71.60.255
65	10.71.61.0/30	10.71.61.1 – 10.71.61.2	10.71.61.3
66	10.71.61.4/30	10.71.61.5 – 10.71.61.6	10.71.61.7
67	10.71.61.8/30	10.71.61.9 – 10.71.61.10	10.71.61.11
68	10.71.61.12/30	10.71.61.13 – 10.71.61.14	10.71.61.15
69	10.71.61.16/30	10.71.61.17 – 10.71.61.18	10.71.61.19
70	10.71.61.20/30	10.71.61.21 – 10.71.61.22	10.71.61.23
71	10.71.61.24/30	10.71.61.25 – 10.71.61.26	10.71.61.27
72	10.71.61.28/30	10.71.61.29 – 10.71.61.30	10.71.61.31
73	10.71.61.32/30	10.71.61.33 – 10.71.61.34	10.71.61.35
74	10.71.61.36/30	10.71.61.37 – 10.71.61.38	10.71.61.39
75	10.71.61.40/30	10.71.61.41 – 10.71.61.42	10.71.61.43
76	10.71.61.44/30	10.71.61.45 – 10.71.61.46	10.71.61.47
77	10.71.61.48/30	10.71.61.49 – 10.71.61.50	10.71.61.51
78	10.71.61.52/30	10.71.61.53 – 10.71.61.54	10.71.61.55
79	10.71.61.56/30	10.71.61.57 – 10.71.61.58	10.71.61.59
80	10.71.61.60/30	10.71.61.61 – 10.71.61.62	10.71.61.63
81	10.71.61.64/30	10.71.61.65 – 10.71.61.66	10.71.61.67
82	10.71.61.68/30	10.71.61.69 – 10.71.61.70	10.71.61.71
83	10.71.61.72/30	10.71.61.73 – 10.71.61.74	10.71.61.75
84	10.71.61.76/30	10.71.61.77 – 10.71.61.78	10.71.61.79
85	10.71.61.80/30	10.71.61.81 – 10.71.61.82	10.71.61.83
86	10.71.61.84/30	10.71.61.85 – 10.71.61.86	10.71.61.87
87	10.71.61.88/30	10.71.61.89 – 10.71.61.90	10.71.61.91
88	10.71.61.92/30	10.71.61.93 – 10.71.61.94	10.71.61.95
89	10.71.61.96/30	10.71.61.97 – 10.71.61.98	10.71.61.99
90	10.71.61.100/30	10.71.61.101 – 10.71.61.102	10.71.61.103
91	10.71.61.104/30	10.71.61.105 – 10.71.61.106	10.71.61.107
92	10.71.61.108/30	10.71.61.109 – 10.71.61.110	10.71.61.111
93	10.71.61.112/30	10.71.61.113 – 10.71.61.114	10.71.61.115
94	10.71.61.116/30	10.71.61.117 – 10.71.61.118	10.71.61.119
95	10.71.61.120/30	10.71.61.121 – 10.71.61.122	10.71.61.123
96	10.71.61.124/30	10.71.61.125 – 10.71.61.126	10.71.61.127
97	10.71.61.128/30	10.71.61.129 – 10.71.61.130	10.71.61.131
98	10.71.61.132/30	10.71.61.133 – 10.71.61.134	10.71.61.135
99	10.71.61.136/30	10.71.61.137 – 10.71.61.138	10.71.61.139
100	10.71.61.140/30	10.71.61.141 – 10.71.61.142	10.71.61.143
101	10.71.61.144/30	10.71.61.145 – 10.71.61.146	10.71.61.147
102	10.71.61.148/30	10.71.61.149 – 10.71.61.150	10.71.61.151
103	10.71.61.152/30	10.71.61.153 – 10.71.61.154	10.71.61.155
104	10.71.61.156/30	10.71.61.157 – 10.71.61.158	10.71.61.159
105	10.71.61.160/30	10.71.61.161 – 10.71.61.162	10.71.61.163
106	10.71.61.164/30	10.71.61.165 – 10.71.61.166	10.71.61.167
107	10.71.61.168/30	10.71.61.169 – 10.71.61.170	10.71.61.171
108	10.71.61.172/30	10.71.61.173 – 10.71.61.174	10.71.61.175
109	10.71.61.176/30	10.71.61.177 – 10.71.61.178	10.71.61.179
110	10.71.61.180/30	10.71.61.181 – 10.71.61.182	10.71.61.183
111	10.71.61.184/30	10.71.61.185 – 10.71.61.186	10.71.61.187
112	10.71.61.188/30	10.71.61.189 – 10.71.61.190	10.71.61.191
113	10.71.61.192/30	10.71.61.193 – 10.71.61.194	10.71.61.195
114	10.71.61.196/30	10.71.61.197 – 10.71.61.198	10.71.61.199
115	10.71.61.200/30	10.71.61.201 – 10.71.61.202	10.71.61.203
116	10.71.61.204/30	10.71.61.205 – 10.71.61.206	10.71.61.207
117	10.71.61.208/30	10.71.61.209 – 10.71.61.210	10.71.61.211
118	10.71.61.212/30	10.71.61.213 – 10.71.61.214	10.71.61.215
119	10.71.61.216/30	10.71.61.217 – 10.71.61.218	10.71.61.219
120	10.71.61.220/30	10.71.61.221 – 10.71.61.222	10.71.61.223
121	10.71.61.224/30	10.71.61.225 – 10.71.61.226	10.71.61.227
122	10.71.61.228/30	10.71.61.229 – 10.71.61.230	10.71.61.231
123	10.71.61.232/30	10.71.61.233 – 10.71.61.234	10.71.61.235
124	10.71.61.236/30	10.71.61.237 – 10.71.61.238	10.71.61.239
125	10.71.61.240/30	10.71.61.241 – 10.71.61.242	10.71.61.243
126	10.71.61.244/30	10.71.61.245 – 10.71.61.246	10.71.61.247
127	10.71.61.248/30	10.71.61.249 – 10.71.61.250	10.71.61.251
128	10.71.61.252/30	10.71.61.253 – 10.71.61.254	10.71.61.255
129	10.71.62.0/30	10.71.62.1 – 10.71.62.2	10.71.62.3
130	10.71.62.4/30	10.71.62.5 – 10.71.62.6	10.71.62.7
131	10.71.62.8/30	10.71.62.9 – 10.71.62.10	10.71.62.11
132	10.71.62.12/30	10.71.62.13 – 10.71.62.14	10.71.62.15
133	10.71.62.16/30	10.71.62.17 – 10.71.62.18	10.71.62.19
134	10.71.62.20/30	10.71.62.21 – 10.71.62.22	10.71.62.23
135	10.71.62.24/30	10.71.62.25 – 10.71.62.26	10.71.62.27
136	10.71.62.28/30	10.71.62.29 – 10.71.62.30	10.71.62.31
137	10.71.62.32/30	10.71.62.33 – 10.71.62.34	10.71.62.35
138	10.71.62.36/30	10.71.62.37 – 10.71.62.38	10.71.62.39
139	10.71.62.40/30	10.71.62.41 – 10.71.62.42	10.71.62.43
140	10.71.62.44/30	10.71.62.45 – 10.71.62.46	10.71.62.47
141	10.71.62.48/30	10.71.62.49 – 10.71.62.50	10.71.62.51
142	10.71.62.52/30	10.71.62.53 – 10.71.62.54	10.71.62.55
143	10.71.62.56/30	10.71.62.57 – 10.71.62.58	10.71.62.59
144	10.71.62.60/30	10.71.62.61 – 10.71.62.62	10.71.62.63
145	10.71.62.64/30	10.71.62.65 – 10.71.62.66	10.71.62.67
146	10.71.62.68/30	10.71.62.69 – 10.71.62.70	10.71.62.71
147	10.71.62.72/30	10.71.62.73 – 10.71.62.74	10.71.62.75
148	10.71.62.76/30	10.71.62.77 – 10.71.62.78	10.71.62.79
149	10.71.62.80/30	10.71.62.81 – 10.71.62.82	10.71.62.83
150	10.71.62.84/30	10.71.62.85 – 10.71.62.86	10.71.62.87
151	10.71.62.88/30	10.71.62.89 – 10.71.62.90	10.71.62.91
152	10.71.62.92/30	10.71.62.93 – 10.71.62.94	10.71.62.95
153	10.71.62.96/30	10.71.62.97 – 10.71.62.98	10.71.62.99
154	10.71.62.100/30	10.71.62.101 – 10.71.62.102	10.71.62.103
155	10.71.62.104/30	10.71.62.105 – 10.71.62.106	10.71.62.107
156	10.71.62.108/30	10.71.62.109 – 10.71.62.110	10.71.62.111
157	10.71.62.112/30	10.71.62.113 – 10.71.62.114	10.71.62.115
158	10.71.62.116/30	10.71.62.117 – 10.71.62.118	10.71.62.119
159	10.71.62.120/30	10.71.62.121 – 10.71.62.122	10.71.62.123
160	10.71.62.124/30	10.71.62.125 – 10.71.62.126	10.71.62.127
161	10.71.62.128/30	10.71.62.129 – 10.71.62.130	10.71.62.131
162	10.71.62.132/30	10.71.62.133 – 10.71.62.134	10.71.62.135
163	10.71.62.136/30	10.71.62.137 – 10.71.62.138	10.71.62.139
164	10.71.62.140/30	10.71.62.141 – 10.71.62.142	10.71.62.143
165	10.71.62.144/30	10.71.62.145 – 10.71.62.146	10.71.62.147
166	10.71.62.148/30	10.71.62.149 – 10.71.62.150	10.71.62.151
167	10.71.62.152/30	10.71.62.153 – 10.71.62.154	10.71.62.155
168	10.71.62.156/30	10.71.62.157 – 10.71.62.158	10.71.62.159
169	10.71.62.160/30	10.71.62.161 – 10.71.62.162	10.71.62.163
170	10.71.62.164/30	10.71.62.165 – 10.71.62.166	10.71.62.167
171	10.71.62.168/30	10.71.62.169 – 10.71.62.170	10.71.62.171
172	10.71.62.172/30	10.71.62.173 – 10.71.62.174	10.71.62.175
173	10.71.62.176/30	10.71.62.177 – 10.71.62.178	10.71.62.179
174	10.71.62.180/30	10.71.62.181 – 10.71.62.182	10.71.62.183
175	10.71.62.184/30	10.71.62.185 – 10.71.62.186	10.71.62.187
176	10.71.62.188/30	10.71.62.189 – 10.71.62.190	10.71.62.191
177	10.71.62.192/30	10.71.62.193 – 10.71.62.194	10.71.62.195
178	10.71.62.196/30	10.71.62.197 – 10.71.62.198	10.71.62.199
179	10.71.62.200/30	10.71.62.201 – 10.71.62.202	10.71.62.203
180	10.71.62.204/30	10.71.62.205 – 10.71.62.206	10.71.62.207
181	10.71.62.208/30	10.71.62.209 – 10.71.62.210	10.71.62.211
182	10.71.62.212/30	10.71.62.213 – 10.71.62.214	10.71.62.215
183	10.71.62.216/30	10.71.62.217 – 10.71.62.218	10.71.62.219
184	10.71.62.220/30	10.71.62.221 – 10.71.62.222	10.71.62.223
185	10.71.62.224/30	10.71.62.225 – 10.71.62.226	10.71.62.227
186	10.71.62.228/30	10.71.62.229 – 10.71.62.230	10.71.62.231
187	10.71.62.232/30	10.71.62.233 – 10.71.62.234	10.71.62.235
188	10.71.62.236/30	10.71.62.237 – 10.71.62.238	10.71.62.239
189	10.71.62.240/30	10.71.62.241 – 10.71.62.242	10.71.62.243
190	10.71.62.244/30	10.71.62.245 – 10.71.62.246	10.71.62.247
191	10.71.62.248/30	10.71.62.249 – 10.71.62.250	10.71.62.251
192	10.71.62.252/30	10.71.62.253 – 10.71.62.254	10.71.62.255
193	10.71.63.0/30	10.71.63.1 – 10.71.63.2	10.71.63.3
194	10.71.63.4/30	10.71.63.5 – 10.71.63.6	10.71.63.7
195	10.71.63.8/30	10.71.63.9 – 10.71.63.10	10.71.63.11
196	10.71.63.12/30	10.71.63.13 – 10.71.63.14	10.71.63.15
197	10.71.63.16/30	10.71.63.17 – 10.71.63.18	10.71.63.19
198	10.71.63.20/30	10.71.63.21 – 10.71.63.22	10.71.63.23
199	10.71.63.24/30	10.71.63.25 – 10.71.63.26	10.71.63.27
200	10.71.63.28/30	10.71.63.29 – 10.71.63.30	10.71.63.31
201	10.71.63.32/30	10.71.63.33 – 10.71.63.34	10.71.63.35
202	10.71.63.36/30	10.71.63.37 – 10.71.63.38	10.71.63.39
203	10.71.63.40/30	10.71.63.41 – 10.71.63.42	10.71.63.43
204	10.71.63.44/30	10.71.63.45 – 10.71.63.46	10.71.63.47
205	10.71.63.48/30	10.71.63.49 – 10.71.63.50	10.71.63.51
206	10.71.63.52/30	10.71.63.53 – 10.71.63.54	10.71.63.55
207	10.71.63.56/30	10.71.63.57 – 10.71.63.58	10.71.63.59
208	10.71.63.60/30	10.71.63.61 – 10.71.63.62	10.71.63.63
209	10.71.63.64/30	10.71.63.65 – 10.71.63.66	10.71.63.67
210	10.71.63.68/30	10.71.63.69 – 10.71.63.70	10.71.63.71
211	10.71.63.72/30	10.71.63.73 – 10.71.63.74	10.71.63.75
212	10.71.63.76/30	10.71.63.77 – 10.71.63.78	10.71.63.79
213	10.71.63.80/30	10.71.63.81 – 10.71.63.82	10.71.63.83
214	10.71.63.84/30	10.71.63.85 – 10.71.63.86	10.71.63.87
215	10.71.63.88/30	10.71.63.89 – 10.71.63.90	10.71.63.91
216	10.71.63.92/30	10.71.63.93 – 10.71.63.94	10.71.63.95
217	10.71.63.96/30	10.71.63.97 – 10.71.63.98	10.71.63.99
218	10.71.63.100/30	10.71.63.101 – 10.71.63.102	10.71.63.103
219	10.71.63.104/30	10.71.63.105 – 10.71.63.106	10.71.63.107
220	10.71.63.108/30	10.71.63.109 – 10.71.63.110	10.71.63.111
221	10.71.63.112/30	10.71.63.113 – 10.71.63.114	10.71.63.115
222	10.71.63.116/30	10.71.63.117 – 10.71.63.118	10.71.63.119
223	10.71.63.120/30	10.71.63.121 – 10.71.63.122	10.71.63.123
224	10.71.63.124/30	10.71.63.125 – 10.71.63.126	10.71.63.127
225	10.71.63.128/30	10.71.63.129 – 10.71.63.130	10.71.63.131
226	10.71.63.132/30	10.71.63.133 – 10.71.63.134	10.71.63.135
227	10.71.63.136/30	10.71.63.137 – 10.71.63.138	10.71.63.139
228	10.71.63.140/30	10.71.63.141 – 10.71.63.142	10.71.63.143
229	10.71.63.144/30	10.71.63.145 – 10.71.63.146	10.71.63.147
230	10.71.63.148/30	10.71.63.149 – 10.71.63.150	10.71.63.151
231	10.71.63.152/30	10.71.63.153 – 10.71.63.154	10.71.63.155
232	10.71.63.156/30	10.71.63.157 – 10.71.63.158	10.71.63.159
233	10.71.63.160/30	10.71.63.161 – 10.71.63.162	10.71.63.163
234	10.71.63.164/30	10.71.63.165 – 10.71.63.166	10.71.63.167
235	10.71.63.168/30	10.71.63.169 – 10.71.63.170	10.71.63.171
236	10.71.63.172/30	10.71.63.173 – 10.71.63.174	10.71.63.175
237	10.71.63.176/30	10.71.63.177 – 10.71.63.178	10.71.63.179
238	10.71.63.180/30	10.71.63.181 – 10.71.63.182	10.71.63.183
239	10.71.63.184/30	10.71.63.185 – 10.71.63.186	10.71.63.187
240	10.71.63.188/30	10.71.63.189 – 10.71.63.190	10.71.63.191
241	10.71.63.192/30	10.71.63.193 – 10.71.63.194	10.71.63.195
242	10.71.63.196/30	10.71.63.197 – 10.71.63.198	10.71.63.199
243	10.71.63.200/30	10.71.63.201 – 10.71.63.202	10.71.63.203
244	10.71.63.204/30	10.71.63.205 – 10.71.63.206	10.71.63.207
245	10.71.63.208/30	10.71.63.209 – 10.71.63.210	10.71.63.211
246	10.71.63.212/30	10.71.63.213 – 10.71.63.214	10.71.63.215
247	10.71.63.216/30	10.71.63.217 – 10.71.63.218	10.71.63.219
248	10.71.63.220/30	10.71.63.221 – 10.71.63.222	10.71.63.223
249	10.71.63.224/30	10.71.63.225 – 10.71.63.226	10.71.63.227
250	10.71.63.228/30	10.71.63.229 – 10.71.63.230	10.71.63.231
251	10.71.63.232/30	10.71.63.233 – 10.71.63.234	10.71.63.235
252	10.71.63.236/30	10.71.63.237 – 10.71.63.238	10.71.63.239
253	10.71.63.240/30	10.71.63.241 – 10.71.63.242	10.71.63.243
254	10.71.63.244/30	10.71.63.245 – 10.71.63.246	10.71.63.247
255	10.71.63.248/30	10.71.63.249 – 10.71.63.250	10.71.63.251
256	10.71.63.252/30	10.71.63.253 – 10.71.63.254	10.71.63.255

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 →