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)10.31.224.0/19

network10.31.224.0/19

broadcast10.31.255.255

first host10.31.224.1

last host10.31.255.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.31.224.0/19

address00001010.00011111.11100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011111.11100000.00000000

broadcast00001010.00011111.11111111.11111111

green = network part, grey = host part

hex0x0a1fe000

decimal169861120

reverse dns0.224.31.10.in-addr.arpa

ipv4-mapped::ffff:a1f:e000

/19 split into /30 · 2,048 subnets

close ×

#	network	host range	broadcast
1	10.31.224.0/30	10.31.224.1 – 10.31.224.2	10.31.224.3
2	10.31.224.4/30	10.31.224.5 – 10.31.224.6	10.31.224.7
3	10.31.224.8/30	10.31.224.9 – 10.31.224.10	10.31.224.11
4	10.31.224.12/30	10.31.224.13 – 10.31.224.14	10.31.224.15
5	10.31.224.16/30	10.31.224.17 – 10.31.224.18	10.31.224.19
6	10.31.224.20/30	10.31.224.21 – 10.31.224.22	10.31.224.23
7	10.31.224.24/30	10.31.224.25 – 10.31.224.26	10.31.224.27
8	10.31.224.28/30	10.31.224.29 – 10.31.224.30	10.31.224.31
9	10.31.224.32/30	10.31.224.33 – 10.31.224.34	10.31.224.35
10	10.31.224.36/30	10.31.224.37 – 10.31.224.38	10.31.224.39
11	10.31.224.40/30	10.31.224.41 – 10.31.224.42	10.31.224.43
12	10.31.224.44/30	10.31.224.45 – 10.31.224.46	10.31.224.47
13	10.31.224.48/30	10.31.224.49 – 10.31.224.50	10.31.224.51
14	10.31.224.52/30	10.31.224.53 – 10.31.224.54	10.31.224.55
15	10.31.224.56/30	10.31.224.57 – 10.31.224.58	10.31.224.59
16	10.31.224.60/30	10.31.224.61 – 10.31.224.62	10.31.224.63
17	10.31.224.64/30	10.31.224.65 – 10.31.224.66	10.31.224.67
18	10.31.224.68/30	10.31.224.69 – 10.31.224.70	10.31.224.71
19	10.31.224.72/30	10.31.224.73 – 10.31.224.74	10.31.224.75
20	10.31.224.76/30	10.31.224.77 – 10.31.224.78	10.31.224.79
21	10.31.224.80/30	10.31.224.81 – 10.31.224.82	10.31.224.83
22	10.31.224.84/30	10.31.224.85 – 10.31.224.86	10.31.224.87
23	10.31.224.88/30	10.31.224.89 – 10.31.224.90	10.31.224.91
24	10.31.224.92/30	10.31.224.93 – 10.31.224.94	10.31.224.95
25	10.31.224.96/30	10.31.224.97 – 10.31.224.98	10.31.224.99
26	10.31.224.100/30	10.31.224.101 – 10.31.224.102	10.31.224.103
27	10.31.224.104/30	10.31.224.105 – 10.31.224.106	10.31.224.107
28	10.31.224.108/30	10.31.224.109 – 10.31.224.110	10.31.224.111
29	10.31.224.112/30	10.31.224.113 – 10.31.224.114	10.31.224.115
30	10.31.224.116/30	10.31.224.117 – 10.31.224.118	10.31.224.119
31	10.31.224.120/30	10.31.224.121 – 10.31.224.122	10.31.224.123
32	10.31.224.124/30	10.31.224.125 – 10.31.224.126	10.31.224.127
33	10.31.224.128/30	10.31.224.129 – 10.31.224.130	10.31.224.131
34	10.31.224.132/30	10.31.224.133 – 10.31.224.134	10.31.224.135
35	10.31.224.136/30	10.31.224.137 – 10.31.224.138	10.31.224.139
36	10.31.224.140/30	10.31.224.141 – 10.31.224.142	10.31.224.143
37	10.31.224.144/30	10.31.224.145 – 10.31.224.146	10.31.224.147
38	10.31.224.148/30	10.31.224.149 – 10.31.224.150	10.31.224.151
39	10.31.224.152/30	10.31.224.153 – 10.31.224.154	10.31.224.155
40	10.31.224.156/30	10.31.224.157 – 10.31.224.158	10.31.224.159
41	10.31.224.160/30	10.31.224.161 – 10.31.224.162	10.31.224.163
42	10.31.224.164/30	10.31.224.165 – 10.31.224.166	10.31.224.167
43	10.31.224.168/30	10.31.224.169 – 10.31.224.170	10.31.224.171
44	10.31.224.172/30	10.31.224.173 – 10.31.224.174	10.31.224.175
45	10.31.224.176/30	10.31.224.177 – 10.31.224.178	10.31.224.179
46	10.31.224.180/30	10.31.224.181 – 10.31.224.182	10.31.224.183
47	10.31.224.184/30	10.31.224.185 – 10.31.224.186	10.31.224.187
48	10.31.224.188/30	10.31.224.189 – 10.31.224.190	10.31.224.191
49	10.31.224.192/30	10.31.224.193 – 10.31.224.194	10.31.224.195
50	10.31.224.196/30	10.31.224.197 – 10.31.224.198	10.31.224.199
51	10.31.224.200/30	10.31.224.201 – 10.31.224.202	10.31.224.203
52	10.31.224.204/30	10.31.224.205 – 10.31.224.206	10.31.224.207
53	10.31.224.208/30	10.31.224.209 – 10.31.224.210	10.31.224.211
54	10.31.224.212/30	10.31.224.213 – 10.31.224.214	10.31.224.215
55	10.31.224.216/30	10.31.224.217 – 10.31.224.218	10.31.224.219
56	10.31.224.220/30	10.31.224.221 – 10.31.224.222	10.31.224.223
57	10.31.224.224/30	10.31.224.225 – 10.31.224.226	10.31.224.227
58	10.31.224.228/30	10.31.224.229 – 10.31.224.230	10.31.224.231
59	10.31.224.232/30	10.31.224.233 – 10.31.224.234	10.31.224.235
60	10.31.224.236/30	10.31.224.237 – 10.31.224.238	10.31.224.239
61	10.31.224.240/30	10.31.224.241 – 10.31.224.242	10.31.224.243
62	10.31.224.244/30	10.31.224.245 – 10.31.224.246	10.31.224.247
63	10.31.224.248/30	10.31.224.249 – 10.31.224.250	10.31.224.251
64	10.31.224.252/30	10.31.224.253 – 10.31.224.254	10.31.224.255
65	10.31.225.0/30	10.31.225.1 – 10.31.225.2	10.31.225.3
66	10.31.225.4/30	10.31.225.5 – 10.31.225.6	10.31.225.7
67	10.31.225.8/30	10.31.225.9 – 10.31.225.10	10.31.225.11
68	10.31.225.12/30	10.31.225.13 – 10.31.225.14	10.31.225.15
69	10.31.225.16/30	10.31.225.17 – 10.31.225.18	10.31.225.19
70	10.31.225.20/30	10.31.225.21 – 10.31.225.22	10.31.225.23
71	10.31.225.24/30	10.31.225.25 – 10.31.225.26	10.31.225.27
72	10.31.225.28/30	10.31.225.29 – 10.31.225.30	10.31.225.31
73	10.31.225.32/30	10.31.225.33 – 10.31.225.34	10.31.225.35
74	10.31.225.36/30	10.31.225.37 – 10.31.225.38	10.31.225.39
75	10.31.225.40/30	10.31.225.41 – 10.31.225.42	10.31.225.43
76	10.31.225.44/30	10.31.225.45 – 10.31.225.46	10.31.225.47
77	10.31.225.48/30	10.31.225.49 – 10.31.225.50	10.31.225.51
78	10.31.225.52/30	10.31.225.53 – 10.31.225.54	10.31.225.55
79	10.31.225.56/30	10.31.225.57 – 10.31.225.58	10.31.225.59
80	10.31.225.60/30	10.31.225.61 – 10.31.225.62	10.31.225.63
81	10.31.225.64/30	10.31.225.65 – 10.31.225.66	10.31.225.67
82	10.31.225.68/30	10.31.225.69 – 10.31.225.70	10.31.225.71
83	10.31.225.72/30	10.31.225.73 – 10.31.225.74	10.31.225.75
84	10.31.225.76/30	10.31.225.77 – 10.31.225.78	10.31.225.79
85	10.31.225.80/30	10.31.225.81 – 10.31.225.82	10.31.225.83
86	10.31.225.84/30	10.31.225.85 – 10.31.225.86	10.31.225.87
87	10.31.225.88/30	10.31.225.89 – 10.31.225.90	10.31.225.91
88	10.31.225.92/30	10.31.225.93 – 10.31.225.94	10.31.225.95
89	10.31.225.96/30	10.31.225.97 – 10.31.225.98	10.31.225.99
90	10.31.225.100/30	10.31.225.101 – 10.31.225.102	10.31.225.103
91	10.31.225.104/30	10.31.225.105 – 10.31.225.106	10.31.225.107
92	10.31.225.108/30	10.31.225.109 – 10.31.225.110	10.31.225.111
93	10.31.225.112/30	10.31.225.113 – 10.31.225.114	10.31.225.115
94	10.31.225.116/30	10.31.225.117 – 10.31.225.118	10.31.225.119
95	10.31.225.120/30	10.31.225.121 – 10.31.225.122	10.31.225.123
96	10.31.225.124/30	10.31.225.125 – 10.31.225.126	10.31.225.127
97	10.31.225.128/30	10.31.225.129 – 10.31.225.130	10.31.225.131
98	10.31.225.132/30	10.31.225.133 – 10.31.225.134	10.31.225.135
99	10.31.225.136/30	10.31.225.137 – 10.31.225.138	10.31.225.139
100	10.31.225.140/30	10.31.225.141 – 10.31.225.142	10.31.225.143
101	10.31.225.144/30	10.31.225.145 – 10.31.225.146	10.31.225.147
102	10.31.225.148/30	10.31.225.149 – 10.31.225.150	10.31.225.151
103	10.31.225.152/30	10.31.225.153 – 10.31.225.154	10.31.225.155
104	10.31.225.156/30	10.31.225.157 – 10.31.225.158	10.31.225.159
105	10.31.225.160/30	10.31.225.161 – 10.31.225.162	10.31.225.163
106	10.31.225.164/30	10.31.225.165 – 10.31.225.166	10.31.225.167
107	10.31.225.168/30	10.31.225.169 – 10.31.225.170	10.31.225.171
108	10.31.225.172/30	10.31.225.173 – 10.31.225.174	10.31.225.175
109	10.31.225.176/30	10.31.225.177 – 10.31.225.178	10.31.225.179
110	10.31.225.180/30	10.31.225.181 – 10.31.225.182	10.31.225.183
111	10.31.225.184/30	10.31.225.185 – 10.31.225.186	10.31.225.187
112	10.31.225.188/30	10.31.225.189 – 10.31.225.190	10.31.225.191
113	10.31.225.192/30	10.31.225.193 – 10.31.225.194	10.31.225.195
114	10.31.225.196/30	10.31.225.197 – 10.31.225.198	10.31.225.199
115	10.31.225.200/30	10.31.225.201 – 10.31.225.202	10.31.225.203
116	10.31.225.204/30	10.31.225.205 – 10.31.225.206	10.31.225.207
117	10.31.225.208/30	10.31.225.209 – 10.31.225.210	10.31.225.211
118	10.31.225.212/30	10.31.225.213 – 10.31.225.214	10.31.225.215
119	10.31.225.216/30	10.31.225.217 – 10.31.225.218	10.31.225.219
120	10.31.225.220/30	10.31.225.221 – 10.31.225.222	10.31.225.223
121	10.31.225.224/30	10.31.225.225 – 10.31.225.226	10.31.225.227
122	10.31.225.228/30	10.31.225.229 – 10.31.225.230	10.31.225.231
123	10.31.225.232/30	10.31.225.233 – 10.31.225.234	10.31.225.235
124	10.31.225.236/30	10.31.225.237 – 10.31.225.238	10.31.225.239
125	10.31.225.240/30	10.31.225.241 – 10.31.225.242	10.31.225.243
126	10.31.225.244/30	10.31.225.245 – 10.31.225.246	10.31.225.247
127	10.31.225.248/30	10.31.225.249 – 10.31.225.250	10.31.225.251
128	10.31.225.252/30	10.31.225.253 – 10.31.225.254	10.31.225.255
129	10.31.226.0/30	10.31.226.1 – 10.31.226.2	10.31.226.3
130	10.31.226.4/30	10.31.226.5 – 10.31.226.6	10.31.226.7
131	10.31.226.8/30	10.31.226.9 – 10.31.226.10	10.31.226.11
132	10.31.226.12/30	10.31.226.13 – 10.31.226.14	10.31.226.15
133	10.31.226.16/30	10.31.226.17 – 10.31.226.18	10.31.226.19
134	10.31.226.20/30	10.31.226.21 – 10.31.226.22	10.31.226.23
135	10.31.226.24/30	10.31.226.25 – 10.31.226.26	10.31.226.27
136	10.31.226.28/30	10.31.226.29 – 10.31.226.30	10.31.226.31
137	10.31.226.32/30	10.31.226.33 – 10.31.226.34	10.31.226.35
138	10.31.226.36/30	10.31.226.37 – 10.31.226.38	10.31.226.39
139	10.31.226.40/30	10.31.226.41 – 10.31.226.42	10.31.226.43
140	10.31.226.44/30	10.31.226.45 – 10.31.226.46	10.31.226.47
141	10.31.226.48/30	10.31.226.49 – 10.31.226.50	10.31.226.51
142	10.31.226.52/30	10.31.226.53 – 10.31.226.54	10.31.226.55
143	10.31.226.56/30	10.31.226.57 – 10.31.226.58	10.31.226.59
144	10.31.226.60/30	10.31.226.61 – 10.31.226.62	10.31.226.63
145	10.31.226.64/30	10.31.226.65 – 10.31.226.66	10.31.226.67
146	10.31.226.68/30	10.31.226.69 – 10.31.226.70	10.31.226.71
147	10.31.226.72/30	10.31.226.73 – 10.31.226.74	10.31.226.75
148	10.31.226.76/30	10.31.226.77 – 10.31.226.78	10.31.226.79
149	10.31.226.80/30	10.31.226.81 – 10.31.226.82	10.31.226.83
150	10.31.226.84/30	10.31.226.85 – 10.31.226.86	10.31.226.87
151	10.31.226.88/30	10.31.226.89 – 10.31.226.90	10.31.226.91
152	10.31.226.92/30	10.31.226.93 – 10.31.226.94	10.31.226.95
153	10.31.226.96/30	10.31.226.97 – 10.31.226.98	10.31.226.99
154	10.31.226.100/30	10.31.226.101 – 10.31.226.102	10.31.226.103
155	10.31.226.104/30	10.31.226.105 – 10.31.226.106	10.31.226.107
156	10.31.226.108/30	10.31.226.109 – 10.31.226.110	10.31.226.111
157	10.31.226.112/30	10.31.226.113 – 10.31.226.114	10.31.226.115
158	10.31.226.116/30	10.31.226.117 – 10.31.226.118	10.31.226.119
159	10.31.226.120/30	10.31.226.121 – 10.31.226.122	10.31.226.123
160	10.31.226.124/30	10.31.226.125 – 10.31.226.126	10.31.226.127
161	10.31.226.128/30	10.31.226.129 – 10.31.226.130	10.31.226.131
162	10.31.226.132/30	10.31.226.133 – 10.31.226.134	10.31.226.135
163	10.31.226.136/30	10.31.226.137 – 10.31.226.138	10.31.226.139
164	10.31.226.140/30	10.31.226.141 – 10.31.226.142	10.31.226.143
165	10.31.226.144/30	10.31.226.145 – 10.31.226.146	10.31.226.147
166	10.31.226.148/30	10.31.226.149 – 10.31.226.150	10.31.226.151
167	10.31.226.152/30	10.31.226.153 – 10.31.226.154	10.31.226.155
168	10.31.226.156/30	10.31.226.157 – 10.31.226.158	10.31.226.159
169	10.31.226.160/30	10.31.226.161 – 10.31.226.162	10.31.226.163
170	10.31.226.164/30	10.31.226.165 – 10.31.226.166	10.31.226.167
171	10.31.226.168/30	10.31.226.169 – 10.31.226.170	10.31.226.171
172	10.31.226.172/30	10.31.226.173 – 10.31.226.174	10.31.226.175
173	10.31.226.176/30	10.31.226.177 – 10.31.226.178	10.31.226.179
174	10.31.226.180/30	10.31.226.181 – 10.31.226.182	10.31.226.183
175	10.31.226.184/30	10.31.226.185 – 10.31.226.186	10.31.226.187
176	10.31.226.188/30	10.31.226.189 – 10.31.226.190	10.31.226.191
177	10.31.226.192/30	10.31.226.193 – 10.31.226.194	10.31.226.195
178	10.31.226.196/30	10.31.226.197 – 10.31.226.198	10.31.226.199
179	10.31.226.200/30	10.31.226.201 – 10.31.226.202	10.31.226.203
180	10.31.226.204/30	10.31.226.205 – 10.31.226.206	10.31.226.207
181	10.31.226.208/30	10.31.226.209 – 10.31.226.210	10.31.226.211
182	10.31.226.212/30	10.31.226.213 – 10.31.226.214	10.31.226.215
183	10.31.226.216/30	10.31.226.217 – 10.31.226.218	10.31.226.219
184	10.31.226.220/30	10.31.226.221 – 10.31.226.222	10.31.226.223
185	10.31.226.224/30	10.31.226.225 – 10.31.226.226	10.31.226.227
186	10.31.226.228/30	10.31.226.229 – 10.31.226.230	10.31.226.231
187	10.31.226.232/30	10.31.226.233 – 10.31.226.234	10.31.226.235
188	10.31.226.236/30	10.31.226.237 – 10.31.226.238	10.31.226.239
189	10.31.226.240/30	10.31.226.241 – 10.31.226.242	10.31.226.243
190	10.31.226.244/30	10.31.226.245 – 10.31.226.246	10.31.226.247
191	10.31.226.248/30	10.31.226.249 – 10.31.226.250	10.31.226.251
192	10.31.226.252/30	10.31.226.253 – 10.31.226.254	10.31.226.255
193	10.31.227.0/30	10.31.227.1 – 10.31.227.2	10.31.227.3
194	10.31.227.4/30	10.31.227.5 – 10.31.227.6	10.31.227.7
195	10.31.227.8/30	10.31.227.9 – 10.31.227.10	10.31.227.11
196	10.31.227.12/30	10.31.227.13 – 10.31.227.14	10.31.227.15
197	10.31.227.16/30	10.31.227.17 – 10.31.227.18	10.31.227.19
198	10.31.227.20/30	10.31.227.21 – 10.31.227.22	10.31.227.23
199	10.31.227.24/30	10.31.227.25 – 10.31.227.26	10.31.227.27
200	10.31.227.28/30	10.31.227.29 – 10.31.227.30	10.31.227.31
201	10.31.227.32/30	10.31.227.33 – 10.31.227.34	10.31.227.35
202	10.31.227.36/30	10.31.227.37 – 10.31.227.38	10.31.227.39
203	10.31.227.40/30	10.31.227.41 – 10.31.227.42	10.31.227.43
204	10.31.227.44/30	10.31.227.45 – 10.31.227.46	10.31.227.47
205	10.31.227.48/30	10.31.227.49 – 10.31.227.50	10.31.227.51
206	10.31.227.52/30	10.31.227.53 – 10.31.227.54	10.31.227.55
207	10.31.227.56/30	10.31.227.57 – 10.31.227.58	10.31.227.59
208	10.31.227.60/30	10.31.227.61 – 10.31.227.62	10.31.227.63
209	10.31.227.64/30	10.31.227.65 – 10.31.227.66	10.31.227.67
210	10.31.227.68/30	10.31.227.69 – 10.31.227.70	10.31.227.71
211	10.31.227.72/30	10.31.227.73 – 10.31.227.74	10.31.227.75
212	10.31.227.76/30	10.31.227.77 – 10.31.227.78	10.31.227.79
213	10.31.227.80/30	10.31.227.81 – 10.31.227.82	10.31.227.83
214	10.31.227.84/30	10.31.227.85 – 10.31.227.86	10.31.227.87
215	10.31.227.88/30	10.31.227.89 – 10.31.227.90	10.31.227.91
216	10.31.227.92/30	10.31.227.93 – 10.31.227.94	10.31.227.95
217	10.31.227.96/30	10.31.227.97 – 10.31.227.98	10.31.227.99
218	10.31.227.100/30	10.31.227.101 – 10.31.227.102	10.31.227.103
219	10.31.227.104/30	10.31.227.105 – 10.31.227.106	10.31.227.107
220	10.31.227.108/30	10.31.227.109 – 10.31.227.110	10.31.227.111
221	10.31.227.112/30	10.31.227.113 – 10.31.227.114	10.31.227.115
222	10.31.227.116/30	10.31.227.117 – 10.31.227.118	10.31.227.119
223	10.31.227.120/30	10.31.227.121 – 10.31.227.122	10.31.227.123
224	10.31.227.124/30	10.31.227.125 – 10.31.227.126	10.31.227.127
225	10.31.227.128/30	10.31.227.129 – 10.31.227.130	10.31.227.131
226	10.31.227.132/30	10.31.227.133 – 10.31.227.134	10.31.227.135
227	10.31.227.136/30	10.31.227.137 – 10.31.227.138	10.31.227.139
228	10.31.227.140/30	10.31.227.141 – 10.31.227.142	10.31.227.143
229	10.31.227.144/30	10.31.227.145 – 10.31.227.146	10.31.227.147
230	10.31.227.148/30	10.31.227.149 – 10.31.227.150	10.31.227.151
231	10.31.227.152/30	10.31.227.153 – 10.31.227.154	10.31.227.155
232	10.31.227.156/30	10.31.227.157 – 10.31.227.158	10.31.227.159
233	10.31.227.160/30	10.31.227.161 – 10.31.227.162	10.31.227.163
234	10.31.227.164/30	10.31.227.165 – 10.31.227.166	10.31.227.167
235	10.31.227.168/30	10.31.227.169 – 10.31.227.170	10.31.227.171
236	10.31.227.172/30	10.31.227.173 – 10.31.227.174	10.31.227.175
237	10.31.227.176/30	10.31.227.177 – 10.31.227.178	10.31.227.179
238	10.31.227.180/30	10.31.227.181 – 10.31.227.182	10.31.227.183
239	10.31.227.184/30	10.31.227.185 – 10.31.227.186	10.31.227.187
240	10.31.227.188/30	10.31.227.189 – 10.31.227.190	10.31.227.191
241	10.31.227.192/30	10.31.227.193 – 10.31.227.194	10.31.227.195
242	10.31.227.196/30	10.31.227.197 – 10.31.227.198	10.31.227.199
243	10.31.227.200/30	10.31.227.201 – 10.31.227.202	10.31.227.203
244	10.31.227.204/30	10.31.227.205 – 10.31.227.206	10.31.227.207
245	10.31.227.208/30	10.31.227.209 – 10.31.227.210	10.31.227.211
246	10.31.227.212/30	10.31.227.213 – 10.31.227.214	10.31.227.215
247	10.31.227.216/30	10.31.227.217 – 10.31.227.218	10.31.227.219
248	10.31.227.220/30	10.31.227.221 – 10.31.227.222	10.31.227.223
249	10.31.227.224/30	10.31.227.225 – 10.31.227.226	10.31.227.227
250	10.31.227.228/30	10.31.227.229 – 10.31.227.230	10.31.227.231
251	10.31.227.232/30	10.31.227.233 – 10.31.227.234	10.31.227.235
252	10.31.227.236/30	10.31.227.237 – 10.31.227.238	10.31.227.239
253	10.31.227.240/30	10.31.227.241 – 10.31.227.242	10.31.227.243
254	10.31.227.244/30	10.31.227.245 – 10.31.227.246	10.31.227.247
255	10.31.227.248/30	10.31.227.249 – 10.31.227.250	10.31.227.251
256	10.31.227.252/30	10.31.227.253 – 10.31.227.254	10.31.227.255

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 →