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)10.31.160.0/19

network10.31.160.0/19

broadcast10.31.191.255

first host10.31.160.1

last host10.31.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.31.160.0/19

address00001010.00011111.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011111.10100000.00000000

broadcast00001010.00011111.10111111.11111111

green = network part, grey = host part

hex0x0a1fa000

decimal169844736

reverse dns0.160.31.10.in-addr.arpa

ipv4-mapped::ffff:a1f:a000

/19 split into /30 · 2,048 subnets

close ×

#	network	host range	broadcast
1	10.31.160.0/30	10.31.160.1 – 10.31.160.2	10.31.160.3
2	10.31.160.4/30	10.31.160.5 – 10.31.160.6	10.31.160.7
3	10.31.160.8/30	10.31.160.9 – 10.31.160.10	10.31.160.11
4	10.31.160.12/30	10.31.160.13 – 10.31.160.14	10.31.160.15
5	10.31.160.16/30	10.31.160.17 – 10.31.160.18	10.31.160.19
6	10.31.160.20/30	10.31.160.21 – 10.31.160.22	10.31.160.23
7	10.31.160.24/30	10.31.160.25 – 10.31.160.26	10.31.160.27
8	10.31.160.28/30	10.31.160.29 – 10.31.160.30	10.31.160.31
9	10.31.160.32/30	10.31.160.33 – 10.31.160.34	10.31.160.35
10	10.31.160.36/30	10.31.160.37 – 10.31.160.38	10.31.160.39
11	10.31.160.40/30	10.31.160.41 – 10.31.160.42	10.31.160.43
12	10.31.160.44/30	10.31.160.45 – 10.31.160.46	10.31.160.47
13	10.31.160.48/30	10.31.160.49 – 10.31.160.50	10.31.160.51
14	10.31.160.52/30	10.31.160.53 – 10.31.160.54	10.31.160.55
15	10.31.160.56/30	10.31.160.57 – 10.31.160.58	10.31.160.59
16	10.31.160.60/30	10.31.160.61 – 10.31.160.62	10.31.160.63
17	10.31.160.64/30	10.31.160.65 – 10.31.160.66	10.31.160.67
18	10.31.160.68/30	10.31.160.69 – 10.31.160.70	10.31.160.71
19	10.31.160.72/30	10.31.160.73 – 10.31.160.74	10.31.160.75
20	10.31.160.76/30	10.31.160.77 – 10.31.160.78	10.31.160.79
21	10.31.160.80/30	10.31.160.81 – 10.31.160.82	10.31.160.83
22	10.31.160.84/30	10.31.160.85 – 10.31.160.86	10.31.160.87
23	10.31.160.88/30	10.31.160.89 – 10.31.160.90	10.31.160.91
24	10.31.160.92/30	10.31.160.93 – 10.31.160.94	10.31.160.95
25	10.31.160.96/30	10.31.160.97 – 10.31.160.98	10.31.160.99
26	10.31.160.100/30	10.31.160.101 – 10.31.160.102	10.31.160.103
27	10.31.160.104/30	10.31.160.105 – 10.31.160.106	10.31.160.107
28	10.31.160.108/30	10.31.160.109 – 10.31.160.110	10.31.160.111
29	10.31.160.112/30	10.31.160.113 – 10.31.160.114	10.31.160.115
30	10.31.160.116/30	10.31.160.117 – 10.31.160.118	10.31.160.119
31	10.31.160.120/30	10.31.160.121 – 10.31.160.122	10.31.160.123
32	10.31.160.124/30	10.31.160.125 – 10.31.160.126	10.31.160.127
33	10.31.160.128/30	10.31.160.129 – 10.31.160.130	10.31.160.131
34	10.31.160.132/30	10.31.160.133 – 10.31.160.134	10.31.160.135
35	10.31.160.136/30	10.31.160.137 – 10.31.160.138	10.31.160.139
36	10.31.160.140/30	10.31.160.141 – 10.31.160.142	10.31.160.143
37	10.31.160.144/30	10.31.160.145 – 10.31.160.146	10.31.160.147
38	10.31.160.148/30	10.31.160.149 – 10.31.160.150	10.31.160.151
39	10.31.160.152/30	10.31.160.153 – 10.31.160.154	10.31.160.155
40	10.31.160.156/30	10.31.160.157 – 10.31.160.158	10.31.160.159
41	10.31.160.160/30	10.31.160.161 – 10.31.160.162	10.31.160.163
42	10.31.160.164/30	10.31.160.165 – 10.31.160.166	10.31.160.167
43	10.31.160.168/30	10.31.160.169 – 10.31.160.170	10.31.160.171
44	10.31.160.172/30	10.31.160.173 – 10.31.160.174	10.31.160.175
45	10.31.160.176/30	10.31.160.177 – 10.31.160.178	10.31.160.179
46	10.31.160.180/30	10.31.160.181 – 10.31.160.182	10.31.160.183
47	10.31.160.184/30	10.31.160.185 – 10.31.160.186	10.31.160.187
48	10.31.160.188/30	10.31.160.189 – 10.31.160.190	10.31.160.191
49	10.31.160.192/30	10.31.160.193 – 10.31.160.194	10.31.160.195
50	10.31.160.196/30	10.31.160.197 – 10.31.160.198	10.31.160.199
51	10.31.160.200/30	10.31.160.201 – 10.31.160.202	10.31.160.203
52	10.31.160.204/30	10.31.160.205 – 10.31.160.206	10.31.160.207
53	10.31.160.208/30	10.31.160.209 – 10.31.160.210	10.31.160.211
54	10.31.160.212/30	10.31.160.213 – 10.31.160.214	10.31.160.215
55	10.31.160.216/30	10.31.160.217 – 10.31.160.218	10.31.160.219
56	10.31.160.220/30	10.31.160.221 – 10.31.160.222	10.31.160.223
57	10.31.160.224/30	10.31.160.225 – 10.31.160.226	10.31.160.227
58	10.31.160.228/30	10.31.160.229 – 10.31.160.230	10.31.160.231
59	10.31.160.232/30	10.31.160.233 – 10.31.160.234	10.31.160.235
60	10.31.160.236/30	10.31.160.237 – 10.31.160.238	10.31.160.239
61	10.31.160.240/30	10.31.160.241 – 10.31.160.242	10.31.160.243
62	10.31.160.244/30	10.31.160.245 – 10.31.160.246	10.31.160.247
63	10.31.160.248/30	10.31.160.249 – 10.31.160.250	10.31.160.251
64	10.31.160.252/30	10.31.160.253 – 10.31.160.254	10.31.160.255
65	10.31.161.0/30	10.31.161.1 – 10.31.161.2	10.31.161.3
66	10.31.161.4/30	10.31.161.5 – 10.31.161.6	10.31.161.7
67	10.31.161.8/30	10.31.161.9 – 10.31.161.10	10.31.161.11
68	10.31.161.12/30	10.31.161.13 – 10.31.161.14	10.31.161.15
69	10.31.161.16/30	10.31.161.17 – 10.31.161.18	10.31.161.19
70	10.31.161.20/30	10.31.161.21 – 10.31.161.22	10.31.161.23
71	10.31.161.24/30	10.31.161.25 – 10.31.161.26	10.31.161.27
72	10.31.161.28/30	10.31.161.29 – 10.31.161.30	10.31.161.31
73	10.31.161.32/30	10.31.161.33 – 10.31.161.34	10.31.161.35
74	10.31.161.36/30	10.31.161.37 – 10.31.161.38	10.31.161.39
75	10.31.161.40/30	10.31.161.41 – 10.31.161.42	10.31.161.43
76	10.31.161.44/30	10.31.161.45 – 10.31.161.46	10.31.161.47
77	10.31.161.48/30	10.31.161.49 – 10.31.161.50	10.31.161.51
78	10.31.161.52/30	10.31.161.53 – 10.31.161.54	10.31.161.55
79	10.31.161.56/30	10.31.161.57 – 10.31.161.58	10.31.161.59
80	10.31.161.60/30	10.31.161.61 – 10.31.161.62	10.31.161.63
81	10.31.161.64/30	10.31.161.65 – 10.31.161.66	10.31.161.67
82	10.31.161.68/30	10.31.161.69 – 10.31.161.70	10.31.161.71
83	10.31.161.72/30	10.31.161.73 – 10.31.161.74	10.31.161.75
84	10.31.161.76/30	10.31.161.77 – 10.31.161.78	10.31.161.79
85	10.31.161.80/30	10.31.161.81 – 10.31.161.82	10.31.161.83
86	10.31.161.84/30	10.31.161.85 – 10.31.161.86	10.31.161.87
87	10.31.161.88/30	10.31.161.89 – 10.31.161.90	10.31.161.91
88	10.31.161.92/30	10.31.161.93 – 10.31.161.94	10.31.161.95
89	10.31.161.96/30	10.31.161.97 – 10.31.161.98	10.31.161.99
90	10.31.161.100/30	10.31.161.101 – 10.31.161.102	10.31.161.103
91	10.31.161.104/30	10.31.161.105 – 10.31.161.106	10.31.161.107
92	10.31.161.108/30	10.31.161.109 – 10.31.161.110	10.31.161.111
93	10.31.161.112/30	10.31.161.113 – 10.31.161.114	10.31.161.115
94	10.31.161.116/30	10.31.161.117 – 10.31.161.118	10.31.161.119
95	10.31.161.120/30	10.31.161.121 – 10.31.161.122	10.31.161.123
96	10.31.161.124/30	10.31.161.125 – 10.31.161.126	10.31.161.127
97	10.31.161.128/30	10.31.161.129 – 10.31.161.130	10.31.161.131
98	10.31.161.132/30	10.31.161.133 – 10.31.161.134	10.31.161.135
99	10.31.161.136/30	10.31.161.137 – 10.31.161.138	10.31.161.139
100	10.31.161.140/30	10.31.161.141 – 10.31.161.142	10.31.161.143
101	10.31.161.144/30	10.31.161.145 – 10.31.161.146	10.31.161.147
102	10.31.161.148/30	10.31.161.149 – 10.31.161.150	10.31.161.151
103	10.31.161.152/30	10.31.161.153 – 10.31.161.154	10.31.161.155
104	10.31.161.156/30	10.31.161.157 – 10.31.161.158	10.31.161.159
105	10.31.161.160/30	10.31.161.161 – 10.31.161.162	10.31.161.163
106	10.31.161.164/30	10.31.161.165 – 10.31.161.166	10.31.161.167
107	10.31.161.168/30	10.31.161.169 – 10.31.161.170	10.31.161.171
108	10.31.161.172/30	10.31.161.173 – 10.31.161.174	10.31.161.175
109	10.31.161.176/30	10.31.161.177 – 10.31.161.178	10.31.161.179
110	10.31.161.180/30	10.31.161.181 – 10.31.161.182	10.31.161.183
111	10.31.161.184/30	10.31.161.185 – 10.31.161.186	10.31.161.187
112	10.31.161.188/30	10.31.161.189 – 10.31.161.190	10.31.161.191
113	10.31.161.192/30	10.31.161.193 – 10.31.161.194	10.31.161.195
114	10.31.161.196/30	10.31.161.197 – 10.31.161.198	10.31.161.199
115	10.31.161.200/30	10.31.161.201 – 10.31.161.202	10.31.161.203
116	10.31.161.204/30	10.31.161.205 – 10.31.161.206	10.31.161.207
117	10.31.161.208/30	10.31.161.209 – 10.31.161.210	10.31.161.211
118	10.31.161.212/30	10.31.161.213 – 10.31.161.214	10.31.161.215
119	10.31.161.216/30	10.31.161.217 – 10.31.161.218	10.31.161.219
120	10.31.161.220/30	10.31.161.221 – 10.31.161.222	10.31.161.223
121	10.31.161.224/30	10.31.161.225 – 10.31.161.226	10.31.161.227
122	10.31.161.228/30	10.31.161.229 – 10.31.161.230	10.31.161.231
123	10.31.161.232/30	10.31.161.233 – 10.31.161.234	10.31.161.235
124	10.31.161.236/30	10.31.161.237 – 10.31.161.238	10.31.161.239
125	10.31.161.240/30	10.31.161.241 – 10.31.161.242	10.31.161.243
126	10.31.161.244/30	10.31.161.245 – 10.31.161.246	10.31.161.247
127	10.31.161.248/30	10.31.161.249 – 10.31.161.250	10.31.161.251
128	10.31.161.252/30	10.31.161.253 – 10.31.161.254	10.31.161.255
129	10.31.162.0/30	10.31.162.1 – 10.31.162.2	10.31.162.3
130	10.31.162.4/30	10.31.162.5 – 10.31.162.6	10.31.162.7
131	10.31.162.8/30	10.31.162.9 – 10.31.162.10	10.31.162.11
132	10.31.162.12/30	10.31.162.13 – 10.31.162.14	10.31.162.15
133	10.31.162.16/30	10.31.162.17 – 10.31.162.18	10.31.162.19
134	10.31.162.20/30	10.31.162.21 – 10.31.162.22	10.31.162.23
135	10.31.162.24/30	10.31.162.25 – 10.31.162.26	10.31.162.27
136	10.31.162.28/30	10.31.162.29 – 10.31.162.30	10.31.162.31
137	10.31.162.32/30	10.31.162.33 – 10.31.162.34	10.31.162.35
138	10.31.162.36/30	10.31.162.37 – 10.31.162.38	10.31.162.39
139	10.31.162.40/30	10.31.162.41 – 10.31.162.42	10.31.162.43
140	10.31.162.44/30	10.31.162.45 – 10.31.162.46	10.31.162.47
141	10.31.162.48/30	10.31.162.49 – 10.31.162.50	10.31.162.51
142	10.31.162.52/30	10.31.162.53 – 10.31.162.54	10.31.162.55
143	10.31.162.56/30	10.31.162.57 – 10.31.162.58	10.31.162.59
144	10.31.162.60/30	10.31.162.61 – 10.31.162.62	10.31.162.63
145	10.31.162.64/30	10.31.162.65 – 10.31.162.66	10.31.162.67
146	10.31.162.68/30	10.31.162.69 – 10.31.162.70	10.31.162.71
147	10.31.162.72/30	10.31.162.73 – 10.31.162.74	10.31.162.75
148	10.31.162.76/30	10.31.162.77 – 10.31.162.78	10.31.162.79
149	10.31.162.80/30	10.31.162.81 – 10.31.162.82	10.31.162.83
150	10.31.162.84/30	10.31.162.85 – 10.31.162.86	10.31.162.87
151	10.31.162.88/30	10.31.162.89 – 10.31.162.90	10.31.162.91
152	10.31.162.92/30	10.31.162.93 – 10.31.162.94	10.31.162.95
153	10.31.162.96/30	10.31.162.97 – 10.31.162.98	10.31.162.99
154	10.31.162.100/30	10.31.162.101 – 10.31.162.102	10.31.162.103
155	10.31.162.104/30	10.31.162.105 – 10.31.162.106	10.31.162.107
156	10.31.162.108/30	10.31.162.109 – 10.31.162.110	10.31.162.111
157	10.31.162.112/30	10.31.162.113 – 10.31.162.114	10.31.162.115
158	10.31.162.116/30	10.31.162.117 – 10.31.162.118	10.31.162.119
159	10.31.162.120/30	10.31.162.121 – 10.31.162.122	10.31.162.123
160	10.31.162.124/30	10.31.162.125 – 10.31.162.126	10.31.162.127
161	10.31.162.128/30	10.31.162.129 – 10.31.162.130	10.31.162.131
162	10.31.162.132/30	10.31.162.133 – 10.31.162.134	10.31.162.135
163	10.31.162.136/30	10.31.162.137 – 10.31.162.138	10.31.162.139
164	10.31.162.140/30	10.31.162.141 – 10.31.162.142	10.31.162.143
165	10.31.162.144/30	10.31.162.145 – 10.31.162.146	10.31.162.147
166	10.31.162.148/30	10.31.162.149 – 10.31.162.150	10.31.162.151
167	10.31.162.152/30	10.31.162.153 – 10.31.162.154	10.31.162.155
168	10.31.162.156/30	10.31.162.157 – 10.31.162.158	10.31.162.159
169	10.31.162.160/30	10.31.162.161 – 10.31.162.162	10.31.162.163
170	10.31.162.164/30	10.31.162.165 – 10.31.162.166	10.31.162.167
171	10.31.162.168/30	10.31.162.169 – 10.31.162.170	10.31.162.171
172	10.31.162.172/30	10.31.162.173 – 10.31.162.174	10.31.162.175
173	10.31.162.176/30	10.31.162.177 – 10.31.162.178	10.31.162.179
174	10.31.162.180/30	10.31.162.181 – 10.31.162.182	10.31.162.183
175	10.31.162.184/30	10.31.162.185 – 10.31.162.186	10.31.162.187
176	10.31.162.188/30	10.31.162.189 – 10.31.162.190	10.31.162.191
177	10.31.162.192/30	10.31.162.193 – 10.31.162.194	10.31.162.195
178	10.31.162.196/30	10.31.162.197 – 10.31.162.198	10.31.162.199
179	10.31.162.200/30	10.31.162.201 – 10.31.162.202	10.31.162.203
180	10.31.162.204/30	10.31.162.205 – 10.31.162.206	10.31.162.207
181	10.31.162.208/30	10.31.162.209 – 10.31.162.210	10.31.162.211
182	10.31.162.212/30	10.31.162.213 – 10.31.162.214	10.31.162.215
183	10.31.162.216/30	10.31.162.217 – 10.31.162.218	10.31.162.219
184	10.31.162.220/30	10.31.162.221 – 10.31.162.222	10.31.162.223
185	10.31.162.224/30	10.31.162.225 – 10.31.162.226	10.31.162.227
186	10.31.162.228/30	10.31.162.229 – 10.31.162.230	10.31.162.231
187	10.31.162.232/30	10.31.162.233 – 10.31.162.234	10.31.162.235
188	10.31.162.236/30	10.31.162.237 – 10.31.162.238	10.31.162.239
189	10.31.162.240/30	10.31.162.241 – 10.31.162.242	10.31.162.243
190	10.31.162.244/30	10.31.162.245 – 10.31.162.246	10.31.162.247
191	10.31.162.248/30	10.31.162.249 – 10.31.162.250	10.31.162.251
192	10.31.162.252/30	10.31.162.253 – 10.31.162.254	10.31.162.255
193	10.31.163.0/30	10.31.163.1 – 10.31.163.2	10.31.163.3
194	10.31.163.4/30	10.31.163.5 – 10.31.163.6	10.31.163.7
195	10.31.163.8/30	10.31.163.9 – 10.31.163.10	10.31.163.11
196	10.31.163.12/30	10.31.163.13 – 10.31.163.14	10.31.163.15
197	10.31.163.16/30	10.31.163.17 – 10.31.163.18	10.31.163.19
198	10.31.163.20/30	10.31.163.21 – 10.31.163.22	10.31.163.23
199	10.31.163.24/30	10.31.163.25 – 10.31.163.26	10.31.163.27
200	10.31.163.28/30	10.31.163.29 – 10.31.163.30	10.31.163.31
201	10.31.163.32/30	10.31.163.33 – 10.31.163.34	10.31.163.35
202	10.31.163.36/30	10.31.163.37 – 10.31.163.38	10.31.163.39
203	10.31.163.40/30	10.31.163.41 – 10.31.163.42	10.31.163.43
204	10.31.163.44/30	10.31.163.45 – 10.31.163.46	10.31.163.47
205	10.31.163.48/30	10.31.163.49 – 10.31.163.50	10.31.163.51
206	10.31.163.52/30	10.31.163.53 – 10.31.163.54	10.31.163.55
207	10.31.163.56/30	10.31.163.57 – 10.31.163.58	10.31.163.59
208	10.31.163.60/30	10.31.163.61 – 10.31.163.62	10.31.163.63
209	10.31.163.64/30	10.31.163.65 – 10.31.163.66	10.31.163.67
210	10.31.163.68/30	10.31.163.69 – 10.31.163.70	10.31.163.71
211	10.31.163.72/30	10.31.163.73 – 10.31.163.74	10.31.163.75
212	10.31.163.76/30	10.31.163.77 – 10.31.163.78	10.31.163.79
213	10.31.163.80/30	10.31.163.81 – 10.31.163.82	10.31.163.83
214	10.31.163.84/30	10.31.163.85 – 10.31.163.86	10.31.163.87
215	10.31.163.88/30	10.31.163.89 – 10.31.163.90	10.31.163.91
216	10.31.163.92/30	10.31.163.93 – 10.31.163.94	10.31.163.95
217	10.31.163.96/30	10.31.163.97 – 10.31.163.98	10.31.163.99
218	10.31.163.100/30	10.31.163.101 – 10.31.163.102	10.31.163.103
219	10.31.163.104/30	10.31.163.105 – 10.31.163.106	10.31.163.107
220	10.31.163.108/30	10.31.163.109 – 10.31.163.110	10.31.163.111
221	10.31.163.112/30	10.31.163.113 – 10.31.163.114	10.31.163.115
222	10.31.163.116/30	10.31.163.117 – 10.31.163.118	10.31.163.119
223	10.31.163.120/30	10.31.163.121 – 10.31.163.122	10.31.163.123
224	10.31.163.124/30	10.31.163.125 – 10.31.163.126	10.31.163.127
225	10.31.163.128/30	10.31.163.129 – 10.31.163.130	10.31.163.131
226	10.31.163.132/30	10.31.163.133 – 10.31.163.134	10.31.163.135
227	10.31.163.136/30	10.31.163.137 – 10.31.163.138	10.31.163.139
228	10.31.163.140/30	10.31.163.141 – 10.31.163.142	10.31.163.143
229	10.31.163.144/30	10.31.163.145 – 10.31.163.146	10.31.163.147
230	10.31.163.148/30	10.31.163.149 – 10.31.163.150	10.31.163.151
231	10.31.163.152/30	10.31.163.153 – 10.31.163.154	10.31.163.155
232	10.31.163.156/30	10.31.163.157 – 10.31.163.158	10.31.163.159
233	10.31.163.160/30	10.31.163.161 – 10.31.163.162	10.31.163.163
234	10.31.163.164/30	10.31.163.165 – 10.31.163.166	10.31.163.167
235	10.31.163.168/30	10.31.163.169 – 10.31.163.170	10.31.163.171
236	10.31.163.172/30	10.31.163.173 – 10.31.163.174	10.31.163.175
237	10.31.163.176/30	10.31.163.177 – 10.31.163.178	10.31.163.179
238	10.31.163.180/30	10.31.163.181 – 10.31.163.182	10.31.163.183
239	10.31.163.184/30	10.31.163.185 – 10.31.163.186	10.31.163.187
240	10.31.163.188/30	10.31.163.189 – 10.31.163.190	10.31.163.191
241	10.31.163.192/30	10.31.163.193 – 10.31.163.194	10.31.163.195
242	10.31.163.196/30	10.31.163.197 – 10.31.163.198	10.31.163.199
243	10.31.163.200/30	10.31.163.201 – 10.31.163.202	10.31.163.203
244	10.31.163.204/30	10.31.163.205 – 10.31.163.206	10.31.163.207
245	10.31.163.208/30	10.31.163.209 – 10.31.163.210	10.31.163.211
246	10.31.163.212/30	10.31.163.213 – 10.31.163.214	10.31.163.215
247	10.31.163.216/30	10.31.163.217 – 10.31.163.218	10.31.163.219
248	10.31.163.220/30	10.31.163.221 – 10.31.163.222	10.31.163.223
249	10.31.163.224/30	10.31.163.225 – 10.31.163.226	10.31.163.227
250	10.31.163.228/30	10.31.163.229 – 10.31.163.230	10.31.163.231
251	10.31.163.232/30	10.31.163.233 – 10.31.163.234	10.31.163.235
252	10.31.163.236/30	10.31.163.237 – 10.31.163.238	10.31.163.239
253	10.31.163.240/30	10.31.163.241 – 10.31.163.242	10.31.163.243
254	10.31.163.244/30	10.31.163.245 – 10.31.163.246	10.31.163.247
255	10.31.163.248/30	10.31.163.249 – 10.31.163.250	10.31.163.251
256	10.31.163.252/30	10.31.163.253 – 10.31.163.254	10.31.163.255

showing 256 of 2,048

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →