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)10.8.112.0/20

network10.8.112.0/20

broadcast10.8.127.255

first host10.8.112.1

last host10.8.127.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.8.112.0/20

address00001010.00001000.01110000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.00001000.01110000.00000000

broadcast00001010.00001000.01111111.11111111

green = network part, grey = host part

hex0x0a087000

decimal168325120

reverse dns0.112.8.10.in-addr.arpa

ipv4-mapped::ffff:a08:7000

/20 split into /30 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.8.112.0/30	10.8.112.1 – 10.8.112.2	10.8.112.3
2	10.8.112.4/30	10.8.112.5 – 10.8.112.6	10.8.112.7
3	10.8.112.8/30	10.8.112.9 – 10.8.112.10	10.8.112.11
4	10.8.112.12/30	10.8.112.13 – 10.8.112.14	10.8.112.15
5	10.8.112.16/30	10.8.112.17 – 10.8.112.18	10.8.112.19
6	10.8.112.20/30	10.8.112.21 – 10.8.112.22	10.8.112.23
7	10.8.112.24/30	10.8.112.25 – 10.8.112.26	10.8.112.27
8	10.8.112.28/30	10.8.112.29 – 10.8.112.30	10.8.112.31
9	10.8.112.32/30	10.8.112.33 – 10.8.112.34	10.8.112.35
10	10.8.112.36/30	10.8.112.37 – 10.8.112.38	10.8.112.39
11	10.8.112.40/30	10.8.112.41 – 10.8.112.42	10.8.112.43
12	10.8.112.44/30	10.8.112.45 – 10.8.112.46	10.8.112.47
13	10.8.112.48/30	10.8.112.49 – 10.8.112.50	10.8.112.51
14	10.8.112.52/30	10.8.112.53 – 10.8.112.54	10.8.112.55
15	10.8.112.56/30	10.8.112.57 – 10.8.112.58	10.8.112.59
16	10.8.112.60/30	10.8.112.61 – 10.8.112.62	10.8.112.63
17	10.8.112.64/30	10.8.112.65 – 10.8.112.66	10.8.112.67
18	10.8.112.68/30	10.8.112.69 – 10.8.112.70	10.8.112.71
19	10.8.112.72/30	10.8.112.73 – 10.8.112.74	10.8.112.75
20	10.8.112.76/30	10.8.112.77 – 10.8.112.78	10.8.112.79
21	10.8.112.80/30	10.8.112.81 – 10.8.112.82	10.8.112.83
22	10.8.112.84/30	10.8.112.85 – 10.8.112.86	10.8.112.87
23	10.8.112.88/30	10.8.112.89 – 10.8.112.90	10.8.112.91
24	10.8.112.92/30	10.8.112.93 – 10.8.112.94	10.8.112.95
25	10.8.112.96/30	10.8.112.97 – 10.8.112.98	10.8.112.99
26	10.8.112.100/30	10.8.112.101 – 10.8.112.102	10.8.112.103
27	10.8.112.104/30	10.8.112.105 – 10.8.112.106	10.8.112.107
28	10.8.112.108/30	10.8.112.109 – 10.8.112.110	10.8.112.111
29	10.8.112.112/30	10.8.112.113 – 10.8.112.114	10.8.112.115
30	10.8.112.116/30	10.8.112.117 – 10.8.112.118	10.8.112.119
31	10.8.112.120/30	10.8.112.121 – 10.8.112.122	10.8.112.123
32	10.8.112.124/30	10.8.112.125 – 10.8.112.126	10.8.112.127
33	10.8.112.128/30	10.8.112.129 – 10.8.112.130	10.8.112.131
34	10.8.112.132/30	10.8.112.133 – 10.8.112.134	10.8.112.135
35	10.8.112.136/30	10.8.112.137 – 10.8.112.138	10.8.112.139
36	10.8.112.140/30	10.8.112.141 – 10.8.112.142	10.8.112.143
37	10.8.112.144/30	10.8.112.145 – 10.8.112.146	10.8.112.147
38	10.8.112.148/30	10.8.112.149 – 10.8.112.150	10.8.112.151
39	10.8.112.152/30	10.8.112.153 – 10.8.112.154	10.8.112.155
40	10.8.112.156/30	10.8.112.157 – 10.8.112.158	10.8.112.159
41	10.8.112.160/30	10.8.112.161 – 10.8.112.162	10.8.112.163
42	10.8.112.164/30	10.8.112.165 – 10.8.112.166	10.8.112.167
43	10.8.112.168/30	10.8.112.169 – 10.8.112.170	10.8.112.171
44	10.8.112.172/30	10.8.112.173 – 10.8.112.174	10.8.112.175
45	10.8.112.176/30	10.8.112.177 – 10.8.112.178	10.8.112.179
46	10.8.112.180/30	10.8.112.181 – 10.8.112.182	10.8.112.183
47	10.8.112.184/30	10.8.112.185 – 10.8.112.186	10.8.112.187
48	10.8.112.188/30	10.8.112.189 – 10.8.112.190	10.8.112.191
49	10.8.112.192/30	10.8.112.193 – 10.8.112.194	10.8.112.195
50	10.8.112.196/30	10.8.112.197 – 10.8.112.198	10.8.112.199
51	10.8.112.200/30	10.8.112.201 – 10.8.112.202	10.8.112.203
52	10.8.112.204/30	10.8.112.205 – 10.8.112.206	10.8.112.207
53	10.8.112.208/30	10.8.112.209 – 10.8.112.210	10.8.112.211
54	10.8.112.212/30	10.8.112.213 – 10.8.112.214	10.8.112.215
55	10.8.112.216/30	10.8.112.217 – 10.8.112.218	10.8.112.219
56	10.8.112.220/30	10.8.112.221 – 10.8.112.222	10.8.112.223
57	10.8.112.224/30	10.8.112.225 – 10.8.112.226	10.8.112.227
58	10.8.112.228/30	10.8.112.229 – 10.8.112.230	10.8.112.231
59	10.8.112.232/30	10.8.112.233 – 10.8.112.234	10.8.112.235
60	10.8.112.236/30	10.8.112.237 – 10.8.112.238	10.8.112.239
61	10.8.112.240/30	10.8.112.241 – 10.8.112.242	10.8.112.243
62	10.8.112.244/30	10.8.112.245 – 10.8.112.246	10.8.112.247
63	10.8.112.248/30	10.8.112.249 – 10.8.112.250	10.8.112.251
64	10.8.112.252/30	10.8.112.253 – 10.8.112.254	10.8.112.255
65	10.8.113.0/30	10.8.113.1 – 10.8.113.2	10.8.113.3
66	10.8.113.4/30	10.8.113.5 – 10.8.113.6	10.8.113.7
67	10.8.113.8/30	10.8.113.9 – 10.8.113.10	10.8.113.11
68	10.8.113.12/30	10.8.113.13 – 10.8.113.14	10.8.113.15
69	10.8.113.16/30	10.8.113.17 – 10.8.113.18	10.8.113.19
70	10.8.113.20/30	10.8.113.21 – 10.8.113.22	10.8.113.23
71	10.8.113.24/30	10.8.113.25 – 10.8.113.26	10.8.113.27
72	10.8.113.28/30	10.8.113.29 – 10.8.113.30	10.8.113.31
73	10.8.113.32/30	10.8.113.33 – 10.8.113.34	10.8.113.35
74	10.8.113.36/30	10.8.113.37 – 10.8.113.38	10.8.113.39
75	10.8.113.40/30	10.8.113.41 – 10.8.113.42	10.8.113.43
76	10.8.113.44/30	10.8.113.45 – 10.8.113.46	10.8.113.47
77	10.8.113.48/30	10.8.113.49 – 10.8.113.50	10.8.113.51
78	10.8.113.52/30	10.8.113.53 – 10.8.113.54	10.8.113.55
79	10.8.113.56/30	10.8.113.57 – 10.8.113.58	10.8.113.59
80	10.8.113.60/30	10.8.113.61 – 10.8.113.62	10.8.113.63
81	10.8.113.64/30	10.8.113.65 – 10.8.113.66	10.8.113.67
82	10.8.113.68/30	10.8.113.69 – 10.8.113.70	10.8.113.71
83	10.8.113.72/30	10.8.113.73 – 10.8.113.74	10.8.113.75
84	10.8.113.76/30	10.8.113.77 – 10.8.113.78	10.8.113.79
85	10.8.113.80/30	10.8.113.81 – 10.8.113.82	10.8.113.83
86	10.8.113.84/30	10.8.113.85 – 10.8.113.86	10.8.113.87
87	10.8.113.88/30	10.8.113.89 – 10.8.113.90	10.8.113.91
88	10.8.113.92/30	10.8.113.93 – 10.8.113.94	10.8.113.95
89	10.8.113.96/30	10.8.113.97 – 10.8.113.98	10.8.113.99
90	10.8.113.100/30	10.8.113.101 – 10.8.113.102	10.8.113.103
91	10.8.113.104/30	10.8.113.105 – 10.8.113.106	10.8.113.107
92	10.8.113.108/30	10.8.113.109 – 10.8.113.110	10.8.113.111
93	10.8.113.112/30	10.8.113.113 – 10.8.113.114	10.8.113.115
94	10.8.113.116/30	10.8.113.117 – 10.8.113.118	10.8.113.119
95	10.8.113.120/30	10.8.113.121 – 10.8.113.122	10.8.113.123
96	10.8.113.124/30	10.8.113.125 – 10.8.113.126	10.8.113.127
97	10.8.113.128/30	10.8.113.129 – 10.8.113.130	10.8.113.131
98	10.8.113.132/30	10.8.113.133 – 10.8.113.134	10.8.113.135
99	10.8.113.136/30	10.8.113.137 – 10.8.113.138	10.8.113.139
100	10.8.113.140/30	10.8.113.141 – 10.8.113.142	10.8.113.143
101	10.8.113.144/30	10.8.113.145 – 10.8.113.146	10.8.113.147
102	10.8.113.148/30	10.8.113.149 – 10.8.113.150	10.8.113.151
103	10.8.113.152/30	10.8.113.153 – 10.8.113.154	10.8.113.155
104	10.8.113.156/30	10.8.113.157 – 10.8.113.158	10.8.113.159
105	10.8.113.160/30	10.8.113.161 – 10.8.113.162	10.8.113.163
106	10.8.113.164/30	10.8.113.165 – 10.8.113.166	10.8.113.167
107	10.8.113.168/30	10.8.113.169 – 10.8.113.170	10.8.113.171
108	10.8.113.172/30	10.8.113.173 – 10.8.113.174	10.8.113.175
109	10.8.113.176/30	10.8.113.177 – 10.8.113.178	10.8.113.179
110	10.8.113.180/30	10.8.113.181 – 10.8.113.182	10.8.113.183
111	10.8.113.184/30	10.8.113.185 – 10.8.113.186	10.8.113.187
112	10.8.113.188/30	10.8.113.189 – 10.8.113.190	10.8.113.191
113	10.8.113.192/30	10.8.113.193 – 10.8.113.194	10.8.113.195
114	10.8.113.196/30	10.8.113.197 – 10.8.113.198	10.8.113.199
115	10.8.113.200/30	10.8.113.201 – 10.8.113.202	10.8.113.203
116	10.8.113.204/30	10.8.113.205 – 10.8.113.206	10.8.113.207
117	10.8.113.208/30	10.8.113.209 – 10.8.113.210	10.8.113.211
118	10.8.113.212/30	10.8.113.213 – 10.8.113.214	10.8.113.215
119	10.8.113.216/30	10.8.113.217 – 10.8.113.218	10.8.113.219
120	10.8.113.220/30	10.8.113.221 – 10.8.113.222	10.8.113.223
121	10.8.113.224/30	10.8.113.225 – 10.8.113.226	10.8.113.227
122	10.8.113.228/30	10.8.113.229 – 10.8.113.230	10.8.113.231
123	10.8.113.232/30	10.8.113.233 – 10.8.113.234	10.8.113.235
124	10.8.113.236/30	10.8.113.237 – 10.8.113.238	10.8.113.239
125	10.8.113.240/30	10.8.113.241 – 10.8.113.242	10.8.113.243
126	10.8.113.244/30	10.8.113.245 – 10.8.113.246	10.8.113.247
127	10.8.113.248/30	10.8.113.249 – 10.8.113.250	10.8.113.251
128	10.8.113.252/30	10.8.113.253 – 10.8.113.254	10.8.113.255
129	10.8.114.0/30	10.8.114.1 – 10.8.114.2	10.8.114.3
130	10.8.114.4/30	10.8.114.5 – 10.8.114.6	10.8.114.7
131	10.8.114.8/30	10.8.114.9 – 10.8.114.10	10.8.114.11
132	10.8.114.12/30	10.8.114.13 – 10.8.114.14	10.8.114.15
133	10.8.114.16/30	10.8.114.17 – 10.8.114.18	10.8.114.19
134	10.8.114.20/30	10.8.114.21 – 10.8.114.22	10.8.114.23
135	10.8.114.24/30	10.8.114.25 – 10.8.114.26	10.8.114.27
136	10.8.114.28/30	10.8.114.29 – 10.8.114.30	10.8.114.31
137	10.8.114.32/30	10.8.114.33 – 10.8.114.34	10.8.114.35
138	10.8.114.36/30	10.8.114.37 – 10.8.114.38	10.8.114.39
139	10.8.114.40/30	10.8.114.41 – 10.8.114.42	10.8.114.43
140	10.8.114.44/30	10.8.114.45 – 10.8.114.46	10.8.114.47
141	10.8.114.48/30	10.8.114.49 – 10.8.114.50	10.8.114.51
142	10.8.114.52/30	10.8.114.53 – 10.8.114.54	10.8.114.55
143	10.8.114.56/30	10.8.114.57 – 10.8.114.58	10.8.114.59
144	10.8.114.60/30	10.8.114.61 – 10.8.114.62	10.8.114.63
145	10.8.114.64/30	10.8.114.65 – 10.8.114.66	10.8.114.67
146	10.8.114.68/30	10.8.114.69 – 10.8.114.70	10.8.114.71
147	10.8.114.72/30	10.8.114.73 – 10.8.114.74	10.8.114.75
148	10.8.114.76/30	10.8.114.77 – 10.8.114.78	10.8.114.79
149	10.8.114.80/30	10.8.114.81 – 10.8.114.82	10.8.114.83
150	10.8.114.84/30	10.8.114.85 – 10.8.114.86	10.8.114.87
151	10.8.114.88/30	10.8.114.89 – 10.8.114.90	10.8.114.91
152	10.8.114.92/30	10.8.114.93 – 10.8.114.94	10.8.114.95
153	10.8.114.96/30	10.8.114.97 – 10.8.114.98	10.8.114.99
154	10.8.114.100/30	10.8.114.101 – 10.8.114.102	10.8.114.103
155	10.8.114.104/30	10.8.114.105 – 10.8.114.106	10.8.114.107
156	10.8.114.108/30	10.8.114.109 – 10.8.114.110	10.8.114.111
157	10.8.114.112/30	10.8.114.113 – 10.8.114.114	10.8.114.115
158	10.8.114.116/30	10.8.114.117 – 10.8.114.118	10.8.114.119
159	10.8.114.120/30	10.8.114.121 – 10.8.114.122	10.8.114.123
160	10.8.114.124/30	10.8.114.125 – 10.8.114.126	10.8.114.127
161	10.8.114.128/30	10.8.114.129 – 10.8.114.130	10.8.114.131
162	10.8.114.132/30	10.8.114.133 – 10.8.114.134	10.8.114.135
163	10.8.114.136/30	10.8.114.137 – 10.8.114.138	10.8.114.139
164	10.8.114.140/30	10.8.114.141 – 10.8.114.142	10.8.114.143
165	10.8.114.144/30	10.8.114.145 – 10.8.114.146	10.8.114.147
166	10.8.114.148/30	10.8.114.149 – 10.8.114.150	10.8.114.151
167	10.8.114.152/30	10.8.114.153 – 10.8.114.154	10.8.114.155
168	10.8.114.156/30	10.8.114.157 – 10.8.114.158	10.8.114.159
169	10.8.114.160/30	10.8.114.161 – 10.8.114.162	10.8.114.163
170	10.8.114.164/30	10.8.114.165 – 10.8.114.166	10.8.114.167
171	10.8.114.168/30	10.8.114.169 – 10.8.114.170	10.8.114.171
172	10.8.114.172/30	10.8.114.173 – 10.8.114.174	10.8.114.175
173	10.8.114.176/30	10.8.114.177 – 10.8.114.178	10.8.114.179
174	10.8.114.180/30	10.8.114.181 – 10.8.114.182	10.8.114.183
175	10.8.114.184/30	10.8.114.185 – 10.8.114.186	10.8.114.187
176	10.8.114.188/30	10.8.114.189 – 10.8.114.190	10.8.114.191
177	10.8.114.192/30	10.8.114.193 – 10.8.114.194	10.8.114.195
178	10.8.114.196/30	10.8.114.197 – 10.8.114.198	10.8.114.199
179	10.8.114.200/30	10.8.114.201 – 10.8.114.202	10.8.114.203
180	10.8.114.204/30	10.8.114.205 – 10.8.114.206	10.8.114.207
181	10.8.114.208/30	10.8.114.209 – 10.8.114.210	10.8.114.211
182	10.8.114.212/30	10.8.114.213 – 10.8.114.214	10.8.114.215
183	10.8.114.216/30	10.8.114.217 – 10.8.114.218	10.8.114.219
184	10.8.114.220/30	10.8.114.221 – 10.8.114.222	10.8.114.223
185	10.8.114.224/30	10.8.114.225 – 10.8.114.226	10.8.114.227
186	10.8.114.228/30	10.8.114.229 – 10.8.114.230	10.8.114.231
187	10.8.114.232/30	10.8.114.233 – 10.8.114.234	10.8.114.235
188	10.8.114.236/30	10.8.114.237 – 10.8.114.238	10.8.114.239
189	10.8.114.240/30	10.8.114.241 – 10.8.114.242	10.8.114.243
190	10.8.114.244/30	10.8.114.245 – 10.8.114.246	10.8.114.247
191	10.8.114.248/30	10.8.114.249 – 10.8.114.250	10.8.114.251
192	10.8.114.252/30	10.8.114.253 – 10.8.114.254	10.8.114.255
193	10.8.115.0/30	10.8.115.1 – 10.8.115.2	10.8.115.3
194	10.8.115.4/30	10.8.115.5 – 10.8.115.6	10.8.115.7
195	10.8.115.8/30	10.8.115.9 – 10.8.115.10	10.8.115.11
196	10.8.115.12/30	10.8.115.13 – 10.8.115.14	10.8.115.15
197	10.8.115.16/30	10.8.115.17 – 10.8.115.18	10.8.115.19
198	10.8.115.20/30	10.8.115.21 – 10.8.115.22	10.8.115.23
199	10.8.115.24/30	10.8.115.25 – 10.8.115.26	10.8.115.27
200	10.8.115.28/30	10.8.115.29 – 10.8.115.30	10.8.115.31
201	10.8.115.32/30	10.8.115.33 – 10.8.115.34	10.8.115.35
202	10.8.115.36/30	10.8.115.37 – 10.8.115.38	10.8.115.39
203	10.8.115.40/30	10.8.115.41 – 10.8.115.42	10.8.115.43
204	10.8.115.44/30	10.8.115.45 – 10.8.115.46	10.8.115.47
205	10.8.115.48/30	10.8.115.49 – 10.8.115.50	10.8.115.51
206	10.8.115.52/30	10.8.115.53 – 10.8.115.54	10.8.115.55
207	10.8.115.56/30	10.8.115.57 – 10.8.115.58	10.8.115.59
208	10.8.115.60/30	10.8.115.61 – 10.8.115.62	10.8.115.63
209	10.8.115.64/30	10.8.115.65 – 10.8.115.66	10.8.115.67
210	10.8.115.68/30	10.8.115.69 – 10.8.115.70	10.8.115.71
211	10.8.115.72/30	10.8.115.73 – 10.8.115.74	10.8.115.75
212	10.8.115.76/30	10.8.115.77 – 10.8.115.78	10.8.115.79
213	10.8.115.80/30	10.8.115.81 – 10.8.115.82	10.8.115.83
214	10.8.115.84/30	10.8.115.85 – 10.8.115.86	10.8.115.87
215	10.8.115.88/30	10.8.115.89 – 10.8.115.90	10.8.115.91
216	10.8.115.92/30	10.8.115.93 – 10.8.115.94	10.8.115.95
217	10.8.115.96/30	10.8.115.97 – 10.8.115.98	10.8.115.99
218	10.8.115.100/30	10.8.115.101 – 10.8.115.102	10.8.115.103
219	10.8.115.104/30	10.8.115.105 – 10.8.115.106	10.8.115.107
220	10.8.115.108/30	10.8.115.109 – 10.8.115.110	10.8.115.111
221	10.8.115.112/30	10.8.115.113 – 10.8.115.114	10.8.115.115
222	10.8.115.116/30	10.8.115.117 – 10.8.115.118	10.8.115.119
223	10.8.115.120/30	10.8.115.121 – 10.8.115.122	10.8.115.123
224	10.8.115.124/30	10.8.115.125 – 10.8.115.126	10.8.115.127
225	10.8.115.128/30	10.8.115.129 – 10.8.115.130	10.8.115.131
226	10.8.115.132/30	10.8.115.133 – 10.8.115.134	10.8.115.135
227	10.8.115.136/30	10.8.115.137 – 10.8.115.138	10.8.115.139
228	10.8.115.140/30	10.8.115.141 – 10.8.115.142	10.8.115.143
229	10.8.115.144/30	10.8.115.145 – 10.8.115.146	10.8.115.147
230	10.8.115.148/30	10.8.115.149 – 10.8.115.150	10.8.115.151
231	10.8.115.152/30	10.8.115.153 – 10.8.115.154	10.8.115.155
232	10.8.115.156/30	10.8.115.157 – 10.8.115.158	10.8.115.159
233	10.8.115.160/30	10.8.115.161 – 10.8.115.162	10.8.115.163
234	10.8.115.164/30	10.8.115.165 – 10.8.115.166	10.8.115.167
235	10.8.115.168/30	10.8.115.169 – 10.8.115.170	10.8.115.171
236	10.8.115.172/30	10.8.115.173 – 10.8.115.174	10.8.115.175
237	10.8.115.176/30	10.8.115.177 – 10.8.115.178	10.8.115.179
238	10.8.115.180/30	10.8.115.181 – 10.8.115.182	10.8.115.183
239	10.8.115.184/30	10.8.115.185 – 10.8.115.186	10.8.115.187
240	10.8.115.188/30	10.8.115.189 – 10.8.115.190	10.8.115.191
241	10.8.115.192/30	10.8.115.193 – 10.8.115.194	10.8.115.195
242	10.8.115.196/30	10.8.115.197 – 10.8.115.198	10.8.115.199
243	10.8.115.200/30	10.8.115.201 – 10.8.115.202	10.8.115.203
244	10.8.115.204/30	10.8.115.205 – 10.8.115.206	10.8.115.207
245	10.8.115.208/30	10.8.115.209 – 10.8.115.210	10.8.115.211
246	10.8.115.212/30	10.8.115.213 – 10.8.115.214	10.8.115.215
247	10.8.115.216/30	10.8.115.217 – 10.8.115.218	10.8.115.219
248	10.8.115.220/30	10.8.115.221 – 10.8.115.222	10.8.115.223
249	10.8.115.224/30	10.8.115.225 – 10.8.115.226	10.8.115.227
250	10.8.115.228/30	10.8.115.229 – 10.8.115.230	10.8.115.231
251	10.8.115.232/30	10.8.115.233 – 10.8.115.234	10.8.115.235
252	10.8.115.236/30	10.8.115.237 – 10.8.115.238	10.8.115.239
253	10.8.115.240/30	10.8.115.241 – 10.8.115.242	10.8.115.243
254	10.8.115.244/30	10.8.115.245 – 10.8.115.246	10.8.115.247
255	10.8.115.248/30	10.8.115.249 – 10.8.115.250	10.8.115.251
256	10.8.115.252/30	10.8.115.253 – 10.8.115.254	10.8.115.255

showing 256 of 1,024

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 /20
/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	1
/21	255.255.248.0	2,048	2,046	2 split →
/22	255.255.252.0	1,024	1,022	4 split →
/23	255.255.254.0	512	510	8 split →
/24	255.255.255.0	256	254	16 split →
/25	255.255.255.128	128	126	32 split →
/26	255.255.255.192	64	62	64 split →
/27	255.255.255.224	32	30	128 split →
/28	255.255.255.240	16	14	256 split →
/29	255.255.255.248	8	6	512 split →
/30	255.255.255.252	4	2	1,024 split →
/31	255.255.255.254	2	2	2,048 split →
/32	255.255.255.255	1	1	4,096 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 →