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 /28 · 512 subnets

close ×

#	network	host range	broadcast
1	10.31.224.0/28	10.31.224.1 – 10.31.224.14	10.31.224.15
2	10.31.224.16/28	10.31.224.17 – 10.31.224.30	10.31.224.31
3	10.31.224.32/28	10.31.224.33 – 10.31.224.46	10.31.224.47
4	10.31.224.48/28	10.31.224.49 – 10.31.224.62	10.31.224.63
5	10.31.224.64/28	10.31.224.65 – 10.31.224.78	10.31.224.79
6	10.31.224.80/28	10.31.224.81 – 10.31.224.94	10.31.224.95
7	10.31.224.96/28	10.31.224.97 – 10.31.224.110	10.31.224.111
8	10.31.224.112/28	10.31.224.113 – 10.31.224.126	10.31.224.127
9	10.31.224.128/28	10.31.224.129 – 10.31.224.142	10.31.224.143
10	10.31.224.144/28	10.31.224.145 – 10.31.224.158	10.31.224.159
11	10.31.224.160/28	10.31.224.161 – 10.31.224.174	10.31.224.175
12	10.31.224.176/28	10.31.224.177 – 10.31.224.190	10.31.224.191
13	10.31.224.192/28	10.31.224.193 – 10.31.224.206	10.31.224.207
14	10.31.224.208/28	10.31.224.209 – 10.31.224.222	10.31.224.223
15	10.31.224.224/28	10.31.224.225 – 10.31.224.238	10.31.224.239
16	10.31.224.240/28	10.31.224.241 – 10.31.224.254	10.31.224.255
17	10.31.225.0/28	10.31.225.1 – 10.31.225.14	10.31.225.15
18	10.31.225.16/28	10.31.225.17 – 10.31.225.30	10.31.225.31
19	10.31.225.32/28	10.31.225.33 – 10.31.225.46	10.31.225.47
20	10.31.225.48/28	10.31.225.49 – 10.31.225.62	10.31.225.63
21	10.31.225.64/28	10.31.225.65 – 10.31.225.78	10.31.225.79
22	10.31.225.80/28	10.31.225.81 – 10.31.225.94	10.31.225.95
23	10.31.225.96/28	10.31.225.97 – 10.31.225.110	10.31.225.111
24	10.31.225.112/28	10.31.225.113 – 10.31.225.126	10.31.225.127
25	10.31.225.128/28	10.31.225.129 – 10.31.225.142	10.31.225.143
26	10.31.225.144/28	10.31.225.145 – 10.31.225.158	10.31.225.159
27	10.31.225.160/28	10.31.225.161 – 10.31.225.174	10.31.225.175
28	10.31.225.176/28	10.31.225.177 – 10.31.225.190	10.31.225.191
29	10.31.225.192/28	10.31.225.193 – 10.31.225.206	10.31.225.207
30	10.31.225.208/28	10.31.225.209 – 10.31.225.222	10.31.225.223
31	10.31.225.224/28	10.31.225.225 – 10.31.225.238	10.31.225.239
32	10.31.225.240/28	10.31.225.241 – 10.31.225.254	10.31.225.255
33	10.31.226.0/28	10.31.226.1 – 10.31.226.14	10.31.226.15
34	10.31.226.16/28	10.31.226.17 – 10.31.226.30	10.31.226.31
35	10.31.226.32/28	10.31.226.33 – 10.31.226.46	10.31.226.47
36	10.31.226.48/28	10.31.226.49 – 10.31.226.62	10.31.226.63
37	10.31.226.64/28	10.31.226.65 – 10.31.226.78	10.31.226.79
38	10.31.226.80/28	10.31.226.81 – 10.31.226.94	10.31.226.95
39	10.31.226.96/28	10.31.226.97 – 10.31.226.110	10.31.226.111
40	10.31.226.112/28	10.31.226.113 – 10.31.226.126	10.31.226.127
41	10.31.226.128/28	10.31.226.129 – 10.31.226.142	10.31.226.143
42	10.31.226.144/28	10.31.226.145 – 10.31.226.158	10.31.226.159
43	10.31.226.160/28	10.31.226.161 – 10.31.226.174	10.31.226.175
44	10.31.226.176/28	10.31.226.177 – 10.31.226.190	10.31.226.191
45	10.31.226.192/28	10.31.226.193 – 10.31.226.206	10.31.226.207
46	10.31.226.208/28	10.31.226.209 – 10.31.226.222	10.31.226.223
47	10.31.226.224/28	10.31.226.225 – 10.31.226.238	10.31.226.239
48	10.31.226.240/28	10.31.226.241 – 10.31.226.254	10.31.226.255
49	10.31.227.0/28	10.31.227.1 – 10.31.227.14	10.31.227.15
50	10.31.227.16/28	10.31.227.17 – 10.31.227.30	10.31.227.31
51	10.31.227.32/28	10.31.227.33 – 10.31.227.46	10.31.227.47
52	10.31.227.48/28	10.31.227.49 – 10.31.227.62	10.31.227.63
53	10.31.227.64/28	10.31.227.65 – 10.31.227.78	10.31.227.79
54	10.31.227.80/28	10.31.227.81 – 10.31.227.94	10.31.227.95
55	10.31.227.96/28	10.31.227.97 – 10.31.227.110	10.31.227.111
56	10.31.227.112/28	10.31.227.113 – 10.31.227.126	10.31.227.127
57	10.31.227.128/28	10.31.227.129 – 10.31.227.142	10.31.227.143
58	10.31.227.144/28	10.31.227.145 – 10.31.227.158	10.31.227.159
59	10.31.227.160/28	10.31.227.161 – 10.31.227.174	10.31.227.175
60	10.31.227.176/28	10.31.227.177 – 10.31.227.190	10.31.227.191
61	10.31.227.192/28	10.31.227.193 – 10.31.227.206	10.31.227.207
62	10.31.227.208/28	10.31.227.209 – 10.31.227.222	10.31.227.223
63	10.31.227.224/28	10.31.227.225 – 10.31.227.238	10.31.227.239
64	10.31.227.240/28	10.31.227.241 – 10.31.227.254	10.31.227.255
65	10.31.228.0/28	10.31.228.1 – 10.31.228.14	10.31.228.15
66	10.31.228.16/28	10.31.228.17 – 10.31.228.30	10.31.228.31
67	10.31.228.32/28	10.31.228.33 – 10.31.228.46	10.31.228.47
68	10.31.228.48/28	10.31.228.49 – 10.31.228.62	10.31.228.63
69	10.31.228.64/28	10.31.228.65 – 10.31.228.78	10.31.228.79
70	10.31.228.80/28	10.31.228.81 – 10.31.228.94	10.31.228.95
71	10.31.228.96/28	10.31.228.97 – 10.31.228.110	10.31.228.111
72	10.31.228.112/28	10.31.228.113 – 10.31.228.126	10.31.228.127
73	10.31.228.128/28	10.31.228.129 – 10.31.228.142	10.31.228.143
74	10.31.228.144/28	10.31.228.145 – 10.31.228.158	10.31.228.159
75	10.31.228.160/28	10.31.228.161 – 10.31.228.174	10.31.228.175
76	10.31.228.176/28	10.31.228.177 – 10.31.228.190	10.31.228.191
77	10.31.228.192/28	10.31.228.193 – 10.31.228.206	10.31.228.207
78	10.31.228.208/28	10.31.228.209 – 10.31.228.222	10.31.228.223
79	10.31.228.224/28	10.31.228.225 – 10.31.228.238	10.31.228.239
80	10.31.228.240/28	10.31.228.241 – 10.31.228.254	10.31.228.255
81	10.31.229.0/28	10.31.229.1 – 10.31.229.14	10.31.229.15
82	10.31.229.16/28	10.31.229.17 – 10.31.229.30	10.31.229.31
83	10.31.229.32/28	10.31.229.33 – 10.31.229.46	10.31.229.47
84	10.31.229.48/28	10.31.229.49 – 10.31.229.62	10.31.229.63
85	10.31.229.64/28	10.31.229.65 – 10.31.229.78	10.31.229.79
86	10.31.229.80/28	10.31.229.81 – 10.31.229.94	10.31.229.95
87	10.31.229.96/28	10.31.229.97 – 10.31.229.110	10.31.229.111
88	10.31.229.112/28	10.31.229.113 – 10.31.229.126	10.31.229.127
89	10.31.229.128/28	10.31.229.129 – 10.31.229.142	10.31.229.143
90	10.31.229.144/28	10.31.229.145 – 10.31.229.158	10.31.229.159
91	10.31.229.160/28	10.31.229.161 – 10.31.229.174	10.31.229.175
92	10.31.229.176/28	10.31.229.177 – 10.31.229.190	10.31.229.191
93	10.31.229.192/28	10.31.229.193 – 10.31.229.206	10.31.229.207
94	10.31.229.208/28	10.31.229.209 – 10.31.229.222	10.31.229.223
95	10.31.229.224/28	10.31.229.225 – 10.31.229.238	10.31.229.239
96	10.31.229.240/28	10.31.229.241 – 10.31.229.254	10.31.229.255
97	10.31.230.0/28	10.31.230.1 – 10.31.230.14	10.31.230.15
98	10.31.230.16/28	10.31.230.17 – 10.31.230.30	10.31.230.31
99	10.31.230.32/28	10.31.230.33 – 10.31.230.46	10.31.230.47
100	10.31.230.48/28	10.31.230.49 – 10.31.230.62	10.31.230.63
101	10.31.230.64/28	10.31.230.65 – 10.31.230.78	10.31.230.79
102	10.31.230.80/28	10.31.230.81 – 10.31.230.94	10.31.230.95
103	10.31.230.96/28	10.31.230.97 – 10.31.230.110	10.31.230.111
104	10.31.230.112/28	10.31.230.113 – 10.31.230.126	10.31.230.127
105	10.31.230.128/28	10.31.230.129 – 10.31.230.142	10.31.230.143
106	10.31.230.144/28	10.31.230.145 – 10.31.230.158	10.31.230.159
107	10.31.230.160/28	10.31.230.161 – 10.31.230.174	10.31.230.175
108	10.31.230.176/28	10.31.230.177 – 10.31.230.190	10.31.230.191
109	10.31.230.192/28	10.31.230.193 – 10.31.230.206	10.31.230.207
110	10.31.230.208/28	10.31.230.209 – 10.31.230.222	10.31.230.223
111	10.31.230.224/28	10.31.230.225 – 10.31.230.238	10.31.230.239
112	10.31.230.240/28	10.31.230.241 – 10.31.230.254	10.31.230.255
113	10.31.231.0/28	10.31.231.1 – 10.31.231.14	10.31.231.15
114	10.31.231.16/28	10.31.231.17 – 10.31.231.30	10.31.231.31
115	10.31.231.32/28	10.31.231.33 – 10.31.231.46	10.31.231.47
116	10.31.231.48/28	10.31.231.49 – 10.31.231.62	10.31.231.63
117	10.31.231.64/28	10.31.231.65 – 10.31.231.78	10.31.231.79
118	10.31.231.80/28	10.31.231.81 – 10.31.231.94	10.31.231.95
119	10.31.231.96/28	10.31.231.97 – 10.31.231.110	10.31.231.111
120	10.31.231.112/28	10.31.231.113 – 10.31.231.126	10.31.231.127
121	10.31.231.128/28	10.31.231.129 – 10.31.231.142	10.31.231.143
122	10.31.231.144/28	10.31.231.145 – 10.31.231.158	10.31.231.159
123	10.31.231.160/28	10.31.231.161 – 10.31.231.174	10.31.231.175
124	10.31.231.176/28	10.31.231.177 – 10.31.231.190	10.31.231.191
125	10.31.231.192/28	10.31.231.193 – 10.31.231.206	10.31.231.207
126	10.31.231.208/28	10.31.231.209 – 10.31.231.222	10.31.231.223
127	10.31.231.224/28	10.31.231.225 – 10.31.231.238	10.31.231.239
128	10.31.231.240/28	10.31.231.241 – 10.31.231.254	10.31.231.255
129	10.31.232.0/28	10.31.232.1 – 10.31.232.14	10.31.232.15
130	10.31.232.16/28	10.31.232.17 – 10.31.232.30	10.31.232.31
131	10.31.232.32/28	10.31.232.33 – 10.31.232.46	10.31.232.47
132	10.31.232.48/28	10.31.232.49 – 10.31.232.62	10.31.232.63
133	10.31.232.64/28	10.31.232.65 – 10.31.232.78	10.31.232.79
134	10.31.232.80/28	10.31.232.81 – 10.31.232.94	10.31.232.95
135	10.31.232.96/28	10.31.232.97 – 10.31.232.110	10.31.232.111
136	10.31.232.112/28	10.31.232.113 – 10.31.232.126	10.31.232.127
137	10.31.232.128/28	10.31.232.129 – 10.31.232.142	10.31.232.143
138	10.31.232.144/28	10.31.232.145 – 10.31.232.158	10.31.232.159
139	10.31.232.160/28	10.31.232.161 – 10.31.232.174	10.31.232.175
140	10.31.232.176/28	10.31.232.177 – 10.31.232.190	10.31.232.191
141	10.31.232.192/28	10.31.232.193 – 10.31.232.206	10.31.232.207
142	10.31.232.208/28	10.31.232.209 – 10.31.232.222	10.31.232.223
143	10.31.232.224/28	10.31.232.225 – 10.31.232.238	10.31.232.239
144	10.31.232.240/28	10.31.232.241 – 10.31.232.254	10.31.232.255
145	10.31.233.0/28	10.31.233.1 – 10.31.233.14	10.31.233.15
146	10.31.233.16/28	10.31.233.17 – 10.31.233.30	10.31.233.31
147	10.31.233.32/28	10.31.233.33 – 10.31.233.46	10.31.233.47
148	10.31.233.48/28	10.31.233.49 – 10.31.233.62	10.31.233.63
149	10.31.233.64/28	10.31.233.65 – 10.31.233.78	10.31.233.79
150	10.31.233.80/28	10.31.233.81 – 10.31.233.94	10.31.233.95
151	10.31.233.96/28	10.31.233.97 – 10.31.233.110	10.31.233.111
152	10.31.233.112/28	10.31.233.113 – 10.31.233.126	10.31.233.127
153	10.31.233.128/28	10.31.233.129 – 10.31.233.142	10.31.233.143
154	10.31.233.144/28	10.31.233.145 – 10.31.233.158	10.31.233.159
155	10.31.233.160/28	10.31.233.161 – 10.31.233.174	10.31.233.175
156	10.31.233.176/28	10.31.233.177 – 10.31.233.190	10.31.233.191
157	10.31.233.192/28	10.31.233.193 – 10.31.233.206	10.31.233.207
158	10.31.233.208/28	10.31.233.209 – 10.31.233.222	10.31.233.223
159	10.31.233.224/28	10.31.233.225 – 10.31.233.238	10.31.233.239
160	10.31.233.240/28	10.31.233.241 – 10.31.233.254	10.31.233.255
161	10.31.234.0/28	10.31.234.1 – 10.31.234.14	10.31.234.15
162	10.31.234.16/28	10.31.234.17 – 10.31.234.30	10.31.234.31
163	10.31.234.32/28	10.31.234.33 – 10.31.234.46	10.31.234.47
164	10.31.234.48/28	10.31.234.49 – 10.31.234.62	10.31.234.63
165	10.31.234.64/28	10.31.234.65 – 10.31.234.78	10.31.234.79
166	10.31.234.80/28	10.31.234.81 – 10.31.234.94	10.31.234.95
167	10.31.234.96/28	10.31.234.97 – 10.31.234.110	10.31.234.111
168	10.31.234.112/28	10.31.234.113 – 10.31.234.126	10.31.234.127
169	10.31.234.128/28	10.31.234.129 – 10.31.234.142	10.31.234.143
170	10.31.234.144/28	10.31.234.145 – 10.31.234.158	10.31.234.159
171	10.31.234.160/28	10.31.234.161 – 10.31.234.174	10.31.234.175
172	10.31.234.176/28	10.31.234.177 – 10.31.234.190	10.31.234.191
173	10.31.234.192/28	10.31.234.193 – 10.31.234.206	10.31.234.207
174	10.31.234.208/28	10.31.234.209 – 10.31.234.222	10.31.234.223
175	10.31.234.224/28	10.31.234.225 – 10.31.234.238	10.31.234.239
176	10.31.234.240/28	10.31.234.241 – 10.31.234.254	10.31.234.255
177	10.31.235.0/28	10.31.235.1 – 10.31.235.14	10.31.235.15
178	10.31.235.16/28	10.31.235.17 – 10.31.235.30	10.31.235.31
179	10.31.235.32/28	10.31.235.33 – 10.31.235.46	10.31.235.47
180	10.31.235.48/28	10.31.235.49 – 10.31.235.62	10.31.235.63
181	10.31.235.64/28	10.31.235.65 – 10.31.235.78	10.31.235.79
182	10.31.235.80/28	10.31.235.81 – 10.31.235.94	10.31.235.95
183	10.31.235.96/28	10.31.235.97 – 10.31.235.110	10.31.235.111
184	10.31.235.112/28	10.31.235.113 – 10.31.235.126	10.31.235.127
185	10.31.235.128/28	10.31.235.129 – 10.31.235.142	10.31.235.143
186	10.31.235.144/28	10.31.235.145 – 10.31.235.158	10.31.235.159
187	10.31.235.160/28	10.31.235.161 – 10.31.235.174	10.31.235.175
188	10.31.235.176/28	10.31.235.177 – 10.31.235.190	10.31.235.191
189	10.31.235.192/28	10.31.235.193 – 10.31.235.206	10.31.235.207
190	10.31.235.208/28	10.31.235.209 – 10.31.235.222	10.31.235.223
191	10.31.235.224/28	10.31.235.225 – 10.31.235.238	10.31.235.239
192	10.31.235.240/28	10.31.235.241 – 10.31.235.254	10.31.235.255
193	10.31.236.0/28	10.31.236.1 – 10.31.236.14	10.31.236.15
194	10.31.236.16/28	10.31.236.17 – 10.31.236.30	10.31.236.31
195	10.31.236.32/28	10.31.236.33 – 10.31.236.46	10.31.236.47
196	10.31.236.48/28	10.31.236.49 – 10.31.236.62	10.31.236.63
197	10.31.236.64/28	10.31.236.65 – 10.31.236.78	10.31.236.79
198	10.31.236.80/28	10.31.236.81 – 10.31.236.94	10.31.236.95
199	10.31.236.96/28	10.31.236.97 – 10.31.236.110	10.31.236.111
200	10.31.236.112/28	10.31.236.113 – 10.31.236.126	10.31.236.127
201	10.31.236.128/28	10.31.236.129 – 10.31.236.142	10.31.236.143
202	10.31.236.144/28	10.31.236.145 – 10.31.236.158	10.31.236.159
203	10.31.236.160/28	10.31.236.161 – 10.31.236.174	10.31.236.175
204	10.31.236.176/28	10.31.236.177 – 10.31.236.190	10.31.236.191
205	10.31.236.192/28	10.31.236.193 – 10.31.236.206	10.31.236.207
206	10.31.236.208/28	10.31.236.209 – 10.31.236.222	10.31.236.223
207	10.31.236.224/28	10.31.236.225 – 10.31.236.238	10.31.236.239
208	10.31.236.240/28	10.31.236.241 – 10.31.236.254	10.31.236.255
209	10.31.237.0/28	10.31.237.1 – 10.31.237.14	10.31.237.15
210	10.31.237.16/28	10.31.237.17 – 10.31.237.30	10.31.237.31
211	10.31.237.32/28	10.31.237.33 – 10.31.237.46	10.31.237.47
212	10.31.237.48/28	10.31.237.49 – 10.31.237.62	10.31.237.63
213	10.31.237.64/28	10.31.237.65 – 10.31.237.78	10.31.237.79
214	10.31.237.80/28	10.31.237.81 – 10.31.237.94	10.31.237.95
215	10.31.237.96/28	10.31.237.97 – 10.31.237.110	10.31.237.111
216	10.31.237.112/28	10.31.237.113 – 10.31.237.126	10.31.237.127
217	10.31.237.128/28	10.31.237.129 – 10.31.237.142	10.31.237.143
218	10.31.237.144/28	10.31.237.145 – 10.31.237.158	10.31.237.159
219	10.31.237.160/28	10.31.237.161 – 10.31.237.174	10.31.237.175
220	10.31.237.176/28	10.31.237.177 – 10.31.237.190	10.31.237.191
221	10.31.237.192/28	10.31.237.193 – 10.31.237.206	10.31.237.207
222	10.31.237.208/28	10.31.237.209 – 10.31.237.222	10.31.237.223
223	10.31.237.224/28	10.31.237.225 – 10.31.237.238	10.31.237.239
224	10.31.237.240/28	10.31.237.241 – 10.31.237.254	10.31.237.255
225	10.31.238.0/28	10.31.238.1 – 10.31.238.14	10.31.238.15
226	10.31.238.16/28	10.31.238.17 – 10.31.238.30	10.31.238.31
227	10.31.238.32/28	10.31.238.33 – 10.31.238.46	10.31.238.47
228	10.31.238.48/28	10.31.238.49 – 10.31.238.62	10.31.238.63
229	10.31.238.64/28	10.31.238.65 – 10.31.238.78	10.31.238.79
230	10.31.238.80/28	10.31.238.81 – 10.31.238.94	10.31.238.95
231	10.31.238.96/28	10.31.238.97 – 10.31.238.110	10.31.238.111
232	10.31.238.112/28	10.31.238.113 – 10.31.238.126	10.31.238.127
233	10.31.238.128/28	10.31.238.129 – 10.31.238.142	10.31.238.143
234	10.31.238.144/28	10.31.238.145 – 10.31.238.158	10.31.238.159
235	10.31.238.160/28	10.31.238.161 – 10.31.238.174	10.31.238.175
236	10.31.238.176/28	10.31.238.177 – 10.31.238.190	10.31.238.191
237	10.31.238.192/28	10.31.238.193 – 10.31.238.206	10.31.238.207
238	10.31.238.208/28	10.31.238.209 – 10.31.238.222	10.31.238.223
239	10.31.238.224/28	10.31.238.225 – 10.31.238.238	10.31.238.239
240	10.31.238.240/28	10.31.238.241 – 10.31.238.254	10.31.238.255
241	10.31.239.0/28	10.31.239.1 – 10.31.239.14	10.31.239.15
242	10.31.239.16/28	10.31.239.17 – 10.31.239.30	10.31.239.31
243	10.31.239.32/28	10.31.239.33 – 10.31.239.46	10.31.239.47
244	10.31.239.48/28	10.31.239.49 – 10.31.239.62	10.31.239.63
245	10.31.239.64/28	10.31.239.65 – 10.31.239.78	10.31.239.79
246	10.31.239.80/28	10.31.239.81 – 10.31.239.94	10.31.239.95
247	10.31.239.96/28	10.31.239.97 – 10.31.239.110	10.31.239.111
248	10.31.239.112/28	10.31.239.113 – 10.31.239.126	10.31.239.127
249	10.31.239.128/28	10.31.239.129 – 10.31.239.142	10.31.239.143
250	10.31.239.144/28	10.31.239.145 – 10.31.239.158	10.31.239.159
251	10.31.239.160/28	10.31.239.161 – 10.31.239.174	10.31.239.175
252	10.31.239.176/28	10.31.239.177 – 10.31.239.190	10.31.239.191
253	10.31.239.192/28	10.31.239.193 – 10.31.239.206	10.31.239.207
254	10.31.239.208/28	10.31.239.209 – 10.31.239.222	10.31.239.223
255	10.31.239.224/28	10.31.239.225 – 10.31.239.238	10.31.239.239
256	10.31.239.240/28	10.31.239.241 – 10.31.239.254	10.31.239.255

showing 256 of 512

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 →