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)10.31.96.0/19

network10.31.96.0/19

broadcast10.31.127.255

first host10.31.96.1

last host10.31.127.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.31.96.0/19

address00001010.00011111.01100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011111.01100000.00000000

broadcast00001010.00011111.01111111.11111111

green = network part, grey = host part

hex0x0a1f6000

decimal169828352

reverse dns0.96.31.10.in-addr.arpa

ipv4-mapped::ffff:a1f:6000

/19 split into /28 · 512 subnets

close ×

#	network	host range	broadcast
1	10.31.96.0/28	10.31.96.1 – 10.31.96.14	10.31.96.15
2	10.31.96.16/28	10.31.96.17 – 10.31.96.30	10.31.96.31
3	10.31.96.32/28	10.31.96.33 – 10.31.96.46	10.31.96.47
4	10.31.96.48/28	10.31.96.49 – 10.31.96.62	10.31.96.63
5	10.31.96.64/28	10.31.96.65 – 10.31.96.78	10.31.96.79
6	10.31.96.80/28	10.31.96.81 – 10.31.96.94	10.31.96.95
7	10.31.96.96/28	10.31.96.97 – 10.31.96.110	10.31.96.111
8	10.31.96.112/28	10.31.96.113 – 10.31.96.126	10.31.96.127
9	10.31.96.128/28	10.31.96.129 – 10.31.96.142	10.31.96.143
10	10.31.96.144/28	10.31.96.145 – 10.31.96.158	10.31.96.159
11	10.31.96.160/28	10.31.96.161 – 10.31.96.174	10.31.96.175
12	10.31.96.176/28	10.31.96.177 – 10.31.96.190	10.31.96.191
13	10.31.96.192/28	10.31.96.193 – 10.31.96.206	10.31.96.207
14	10.31.96.208/28	10.31.96.209 – 10.31.96.222	10.31.96.223
15	10.31.96.224/28	10.31.96.225 – 10.31.96.238	10.31.96.239
16	10.31.96.240/28	10.31.96.241 – 10.31.96.254	10.31.96.255
17	10.31.97.0/28	10.31.97.1 – 10.31.97.14	10.31.97.15
18	10.31.97.16/28	10.31.97.17 – 10.31.97.30	10.31.97.31
19	10.31.97.32/28	10.31.97.33 – 10.31.97.46	10.31.97.47
20	10.31.97.48/28	10.31.97.49 – 10.31.97.62	10.31.97.63
21	10.31.97.64/28	10.31.97.65 – 10.31.97.78	10.31.97.79
22	10.31.97.80/28	10.31.97.81 – 10.31.97.94	10.31.97.95
23	10.31.97.96/28	10.31.97.97 – 10.31.97.110	10.31.97.111
24	10.31.97.112/28	10.31.97.113 – 10.31.97.126	10.31.97.127
25	10.31.97.128/28	10.31.97.129 – 10.31.97.142	10.31.97.143
26	10.31.97.144/28	10.31.97.145 – 10.31.97.158	10.31.97.159
27	10.31.97.160/28	10.31.97.161 – 10.31.97.174	10.31.97.175
28	10.31.97.176/28	10.31.97.177 – 10.31.97.190	10.31.97.191
29	10.31.97.192/28	10.31.97.193 – 10.31.97.206	10.31.97.207
30	10.31.97.208/28	10.31.97.209 – 10.31.97.222	10.31.97.223
31	10.31.97.224/28	10.31.97.225 – 10.31.97.238	10.31.97.239
32	10.31.97.240/28	10.31.97.241 – 10.31.97.254	10.31.97.255
33	10.31.98.0/28	10.31.98.1 – 10.31.98.14	10.31.98.15
34	10.31.98.16/28	10.31.98.17 – 10.31.98.30	10.31.98.31
35	10.31.98.32/28	10.31.98.33 – 10.31.98.46	10.31.98.47
36	10.31.98.48/28	10.31.98.49 – 10.31.98.62	10.31.98.63
37	10.31.98.64/28	10.31.98.65 – 10.31.98.78	10.31.98.79
38	10.31.98.80/28	10.31.98.81 – 10.31.98.94	10.31.98.95
39	10.31.98.96/28	10.31.98.97 – 10.31.98.110	10.31.98.111
40	10.31.98.112/28	10.31.98.113 – 10.31.98.126	10.31.98.127
41	10.31.98.128/28	10.31.98.129 – 10.31.98.142	10.31.98.143
42	10.31.98.144/28	10.31.98.145 – 10.31.98.158	10.31.98.159
43	10.31.98.160/28	10.31.98.161 – 10.31.98.174	10.31.98.175
44	10.31.98.176/28	10.31.98.177 – 10.31.98.190	10.31.98.191
45	10.31.98.192/28	10.31.98.193 – 10.31.98.206	10.31.98.207
46	10.31.98.208/28	10.31.98.209 – 10.31.98.222	10.31.98.223
47	10.31.98.224/28	10.31.98.225 – 10.31.98.238	10.31.98.239
48	10.31.98.240/28	10.31.98.241 – 10.31.98.254	10.31.98.255
49	10.31.99.0/28	10.31.99.1 – 10.31.99.14	10.31.99.15
50	10.31.99.16/28	10.31.99.17 – 10.31.99.30	10.31.99.31
51	10.31.99.32/28	10.31.99.33 – 10.31.99.46	10.31.99.47
52	10.31.99.48/28	10.31.99.49 – 10.31.99.62	10.31.99.63
53	10.31.99.64/28	10.31.99.65 – 10.31.99.78	10.31.99.79
54	10.31.99.80/28	10.31.99.81 – 10.31.99.94	10.31.99.95
55	10.31.99.96/28	10.31.99.97 – 10.31.99.110	10.31.99.111
56	10.31.99.112/28	10.31.99.113 – 10.31.99.126	10.31.99.127
57	10.31.99.128/28	10.31.99.129 – 10.31.99.142	10.31.99.143
58	10.31.99.144/28	10.31.99.145 – 10.31.99.158	10.31.99.159
59	10.31.99.160/28	10.31.99.161 – 10.31.99.174	10.31.99.175
60	10.31.99.176/28	10.31.99.177 – 10.31.99.190	10.31.99.191
61	10.31.99.192/28	10.31.99.193 – 10.31.99.206	10.31.99.207
62	10.31.99.208/28	10.31.99.209 – 10.31.99.222	10.31.99.223
63	10.31.99.224/28	10.31.99.225 – 10.31.99.238	10.31.99.239
64	10.31.99.240/28	10.31.99.241 – 10.31.99.254	10.31.99.255
65	10.31.100.0/28	10.31.100.1 – 10.31.100.14	10.31.100.15
66	10.31.100.16/28	10.31.100.17 – 10.31.100.30	10.31.100.31
67	10.31.100.32/28	10.31.100.33 – 10.31.100.46	10.31.100.47
68	10.31.100.48/28	10.31.100.49 – 10.31.100.62	10.31.100.63
69	10.31.100.64/28	10.31.100.65 – 10.31.100.78	10.31.100.79
70	10.31.100.80/28	10.31.100.81 – 10.31.100.94	10.31.100.95
71	10.31.100.96/28	10.31.100.97 – 10.31.100.110	10.31.100.111
72	10.31.100.112/28	10.31.100.113 – 10.31.100.126	10.31.100.127
73	10.31.100.128/28	10.31.100.129 – 10.31.100.142	10.31.100.143
74	10.31.100.144/28	10.31.100.145 – 10.31.100.158	10.31.100.159
75	10.31.100.160/28	10.31.100.161 – 10.31.100.174	10.31.100.175
76	10.31.100.176/28	10.31.100.177 – 10.31.100.190	10.31.100.191
77	10.31.100.192/28	10.31.100.193 – 10.31.100.206	10.31.100.207
78	10.31.100.208/28	10.31.100.209 – 10.31.100.222	10.31.100.223
79	10.31.100.224/28	10.31.100.225 – 10.31.100.238	10.31.100.239
80	10.31.100.240/28	10.31.100.241 – 10.31.100.254	10.31.100.255
81	10.31.101.0/28	10.31.101.1 – 10.31.101.14	10.31.101.15
82	10.31.101.16/28	10.31.101.17 – 10.31.101.30	10.31.101.31
83	10.31.101.32/28	10.31.101.33 – 10.31.101.46	10.31.101.47
84	10.31.101.48/28	10.31.101.49 – 10.31.101.62	10.31.101.63
85	10.31.101.64/28	10.31.101.65 – 10.31.101.78	10.31.101.79
86	10.31.101.80/28	10.31.101.81 – 10.31.101.94	10.31.101.95
87	10.31.101.96/28	10.31.101.97 – 10.31.101.110	10.31.101.111
88	10.31.101.112/28	10.31.101.113 – 10.31.101.126	10.31.101.127
89	10.31.101.128/28	10.31.101.129 – 10.31.101.142	10.31.101.143
90	10.31.101.144/28	10.31.101.145 – 10.31.101.158	10.31.101.159
91	10.31.101.160/28	10.31.101.161 – 10.31.101.174	10.31.101.175
92	10.31.101.176/28	10.31.101.177 – 10.31.101.190	10.31.101.191
93	10.31.101.192/28	10.31.101.193 – 10.31.101.206	10.31.101.207
94	10.31.101.208/28	10.31.101.209 – 10.31.101.222	10.31.101.223
95	10.31.101.224/28	10.31.101.225 – 10.31.101.238	10.31.101.239
96	10.31.101.240/28	10.31.101.241 – 10.31.101.254	10.31.101.255
97	10.31.102.0/28	10.31.102.1 – 10.31.102.14	10.31.102.15
98	10.31.102.16/28	10.31.102.17 – 10.31.102.30	10.31.102.31
99	10.31.102.32/28	10.31.102.33 – 10.31.102.46	10.31.102.47
100	10.31.102.48/28	10.31.102.49 – 10.31.102.62	10.31.102.63
101	10.31.102.64/28	10.31.102.65 – 10.31.102.78	10.31.102.79
102	10.31.102.80/28	10.31.102.81 – 10.31.102.94	10.31.102.95
103	10.31.102.96/28	10.31.102.97 – 10.31.102.110	10.31.102.111
104	10.31.102.112/28	10.31.102.113 – 10.31.102.126	10.31.102.127
105	10.31.102.128/28	10.31.102.129 – 10.31.102.142	10.31.102.143
106	10.31.102.144/28	10.31.102.145 – 10.31.102.158	10.31.102.159
107	10.31.102.160/28	10.31.102.161 – 10.31.102.174	10.31.102.175
108	10.31.102.176/28	10.31.102.177 – 10.31.102.190	10.31.102.191
109	10.31.102.192/28	10.31.102.193 – 10.31.102.206	10.31.102.207
110	10.31.102.208/28	10.31.102.209 – 10.31.102.222	10.31.102.223
111	10.31.102.224/28	10.31.102.225 – 10.31.102.238	10.31.102.239
112	10.31.102.240/28	10.31.102.241 – 10.31.102.254	10.31.102.255
113	10.31.103.0/28	10.31.103.1 – 10.31.103.14	10.31.103.15
114	10.31.103.16/28	10.31.103.17 – 10.31.103.30	10.31.103.31
115	10.31.103.32/28	10.31.103.33 – 10.31.103.46	10.31.103.47
116	10.31.103.48/28	10.31.103.49 – 10.31.103.62	10.31.103.63
117	10.31.103.64/28	10.31.103.65 – 10.31.103.78	10.31.103.79
118	10.31.103.80/28	10.31.103.81 – 10.31.103.94	10.31.103.95
119	10.31.103.96/28	10.31.103.97 – 10.31.103.110	10.31.103.111
120	10.31.103.112/28	10.31.103.113 – 10.31.103.126	10.31.103.127
121	10.31.103.128/28	10.31.103.129 – 10.31.103.142	10.31.103.143
122	10.31.103.144/28	10.31.103.145 – 10.31.103.158	10.31.103.159
123	10.31.103.160/28	10.31.103.161 – 10.31.103.174	10.31.103.175
124	10.31.103.176/28	10.31.103.177 – 10.31.103.190	10.31.103.191
125	10.31.103.192/28	10.31.103.193 – 10.31.103.206	10.31.103.207
126	10.31.103.208/28	10.31.103.209 – 10.31.103.222	10.31.103.223
127	10.31.103.224/28	10.31.103.225 – 10.31.103.238	10.31.103.239
128	10.31.103.240/28	10.31.103.241 – 10.31.103.254	10.31.103.255
129	10.31.104.0/28	10.31.104.1 – 10.31.104.14	10.31.104.15
130	10.31.104.16/28	10.31.104.17 – 10.31.104.30	10.31.104.31
131	10.31.104.32/28	10.31.104.33 – 10.31.104.46	10.31.104.47
132	10.31.104.48/28	10.31.104.49 – 10.31.104.62	10.31.104.63
133	10.31.104.64/28	10.31.104.65 – 10.31.104.78	10.31.104.79
134	10.31.104.80/28	10.31.104.81 – 10.31.104.94	10.31.104.95
135	10.31.104.96/28	10.31.104.97 – 10.31.104.110	10.31.104.111
136	10.31.104.112/28	10.31.104.113 – 10.31.104.126	10.31.104.127
137	10.31.104.128/28	10.31.104.129 – 10.31.104.142	10.31.104.143
138	10.31.104.144/28	10.31.104.145 – 10.31.104.158	10.31.104.159
139	10.31.104.160/28	10.31.104.161 – 10.31.104.174	10.31.104.175
140	10.31.104.176/28	10.31.104.177 – 10.31.104.190	10.31.104.191
141	10.31.104.192/28	10.31.104.193 – 10.31.104.206	10.31.104.207
142	10.31.104.208/28	10.31.104.209 – 10.31.104.222	10.31.104.223
143	10.31.104.224/28	10.31.104.225 – 10.31.104.238	10.31.104.239
144	10.31.104.240/28	10.31.104.241 – 10.31.104.254	10.31.104.255
145	10.31.105.0/28	10.31.105.1 – 10.31.105.14	10.31.105.15
146	10.31.105.16/28	10.31.105.17 – 10.31.105.30	10.31.105.31
147	10.31.105.32/28	10.31.105.33 – 10.31.105.46	10.31.105.47
148	10.31.105.48/28	10.31.105.49 – 10.31.105.62	10.31.105.63
149	10.31.105.64/28	10.31.105.65 – 10.31.105.78	10.31.105.79
150	10.31.105.80/28	10.31.105.81 – 10.31.105.94	10.31.105.95
151	10.31.105.96/28	10.31.105.97 – 10.31.105.110	10.31.105.111
152	10.31.105.112/28	10.31.105.113 – 10.31.105.126	10.31.105.127
153	10.31.105.128/28	10.31.105.129 – 10.31.105.142	10.31.105.143
154	10.31.105.144/28	10.31.105.145 – 10.31.105.158	10.31.105.159
155	10.31.105.160/28	10.31.105.161 – 10.31.105.174	10.31.105.175
156	10.31.105.176/28	10.31.105.177 – 10.31.105.190	10.31.105.191
157	10.31.105.192/28	10.31.105.193 – 10.31.105.206	10.31.105.207
158	10.31.105.208/28	10.31.105.209 – 10.31.105.222	10.31.105.223
159	10.31.105.224/28	10.31.105.225 – 10.31.105.238	10.31.105.239
160	10.31.105.240/28	10.31.105.241 – 10.31.105.254	10.31.105.255
161	10.31.106.0/28	10.31.106.1 – 10.31.106.14	10.31.106.15
162	10.31.106.16/28	10.31.106.17 – 10.31.106.30	10.31.106.31
163	10.31.106.32/28	10.31.106.33 – 10.31.106.46	10.31.106.47
164	10.31.106.48/28	10.31.106.49 – 10.31.106.62	10.31.106.63
165	10.31.106.64/28	10.31.106.65 – 10.31.106.78	10.31.106.79
166	10.31.106.80/28	10.31.106.81 – 10.31.106.94	10.31.106.95
167	10.31.106.96/28	10.31.106.97 – 10.31.106.110	10.31.106.111
168	10.31.106.112/28	10.31.106.113 – 10.31.106.126	10.31.106.127
169	10.31.106.128/28	10.31.106.129 – 10.31.106.142	10.31.106.143
170	10.31.106.144/28	10.31.106.145 – 10.31.106.158	10.31.106.159
171	10.31.106.160/28	10.31.106.161 – 10.31.106.174	10.31.106.175
172	10.31.106.176/28	10.31.106.177 – 10.31.106.190	10.31.106.191
173	10.31.106.192/28	10.31.106.193 – 10.31.106.206	10.31.106.207
174	10.31.106.208/28	10.31.106.209 – 10.31.106.222	10.31.106.223
175	10.31.106.224/28	10.31.106.225 – 10.31.106.238	10.31.106.239
176	10.31.106.240/28	10.31.106.241 – 10.31.106.254	10.31.106.255
177	10.31.107.0/28	10.31.107.1 – 10.31.107.14	10.31.107.15
178	10.31.107.16/28	10.31.107.17 – 10.31.107.30	10.31.107.31
179	10.31.107.32/28	10.31.107.33 – 10.31.107.46	10.31.107.47
180	10.31.107.48/28	10.31.107.49 – 10.31.107.62	10.31.107.63
181	10.31.107.64/28	10.31.107.65 – 10.31.107.78	10.31.107.79
182	10.31.107.80/28	10.31.107.81 – 10.31.107.94	10.31.107.95
183	10.31.107.96/28	10.31.107.97 – 10.31.107.110	10.31.107.111
184	10.31.107.112/28	10.31.107.113 – 10.31.107.126	10.31.107.127
185	10.31.107.128/28	10.31.107.129 – 10.31.107.142	10.31.107.143
186	10.31.107.144/28	10.31.107.145 – 10.31.107.158	10.31.107.159
187	10.31.107.160/28	10.31.107.161 – 10.31.107.174	10.31.107.175
188	10.31.107.176/28	10.31.107.177 – 10.31.107.190	10.31.107.191
189	10.31.107.192/28	10.31.107.193 – 10.31.107.206	10.31.107.207
190	10.31.107.208/28	10.31.107.209 – 10.31.107.222	10.31.107.223
191	10.31.107.224/28	10.31.107.225 – 10.31.107.238	10.31.107.239
192	10.31.107.240/28	10.31.107.241 – 10.31.107.254	10.31.107.255
193	10.31.108.0/28	10.31.108.1 – 10.31.108.14	10.31.108.15
194	10.31.108.16/28	10.31.108.17 – 10.31.108.30	10.31.108.31
195	10.31.108.32/28	10.31.108.33 – 10.31.108.46	10.31.108.47
196	10.31.108.48/28	10.31.108.49 – 10.31.108.62	10.31.108.63
197	10.31.108.64/28	10.31.108.65 – 10.31.108.78	10.31.108.79
198	10.31.108.80/28	10.31.108.81 – 10.31.108.94	10.31.108.95
199	10.31.108.96/28	10.31.108.97 – 10.31.108.110	10.31.108.111
200	10.31.108.112/28	10.31.108.113 – 10.31.108.126	10.31.108.127
201	10.31.108.128/28	10.31.108.129 – 10.31.108.142	10.31.108.143
202	10.31.108.144/28	10.31.108.145 – 10.31.108.158	10.31.108.159
203	10.31.108.160/28	10.31.108.161 – 10.31.108.174	10.31.108.175
204	10.31.108.176/28	10.31.108.177 – 10.31.108.190	10.31.108.191
205	10.31.108.192/28	10.31.108.193 – 10.31.108.206	10.31.108.207
206	10.31.108.208/28	10.31.108.209 – 10.31.108.222	10.31.108.223
207	10.31.108.224/28	10.31.108.225 – 10.31.108.238	10.31.108.239
208	10.31.108.240/28	10.31.108.241 – 10.31.108.254	10.31.108.255
209	10.31.109.0/28	10.31.109.1 – 10.31.109.14	10.31.109.15
210	10.31.109.16/28	10.31.109.17 – 10.31.109.30	10.31.109.31
211	10.31.109.32/28	10.31.109.33 – 10.31.109.46	10.31.109.47
212	10.31.109.48/28	10.31.109.49 – 10.31.109.62	10.31.109.63
213	10.31.109.64/28	10.31.109.65 – 10.31.109.78	10.31.109.79
214	10.31.109.80/28	10.31.109.81 – 10.31.109.94	10.31.109.95
215	10.31.109.96/28	10.31.109.97 – 10.31.109.110	10.31.109.111
216	10.31.109.112/28	10.31.109.113 – 10.31.109.126	10.31.109.127
217	10.31.109.128/28	10.31.109.129 – 10.31.109.142	10.31.109.143
218	10.31.109.144/28	10.31.109.145 – 10.31.109.158	10.31.109.159
219	10.31.109.160/28	10.31.109.161 – 10.31.109.174	10.31.109.175
220	10.31.109.176/28	10.31.109.177 – 10.31.109.190	10.31.109.191
221	10.31.109.192/28	10.31.109.193 – 10.31.109.206	10.31.109.207
222	10.31.109.208/28	10.31.109.209 – 10.31.109.222	10.31.109.223
223	10.31.109.224/28	10.31.109.225 – 10.31.109.238	10.31.109.239
224	10.31.109.240/28	10.31.109.241 – 10.31.109.254	10.31.109.255
225	10.31.110.0/28	10.31.110.1 – 10.31.110.14	10.31.110.15
226	10.31.110.16/28	10.31.110.17 – 10.31.110.30	10.31.110.31
227	10.31.110.32/28	10.31.110.33 – 10.31.110.46	10.31.110.47
228	10.31.110.48/28	10.31.110.49 – 10.31.110.62	10.31.110.63
229	10.31.110.64/28	10.31.110.65 – 10.31.110.78	10.31.110.79
230	10.31.110.80/28	10.31.110.81 – 10.31.110.94	10.31.110.95
231	10.31.110.96/28	10.31.110.97 – 10.31.110.110	10.31.110.111
232	10.31.110.112/28	10.31.110.113 – 10.31.110.126	10.31.110.127
233	10.31.110.128/28	10.31.110.129 – 10.31.110.142	10.31.110.143
234	10.31.110.144/28	10.31.110.145 – 10.31.110.158	10.31.110.159
235	10.31.110.160/28	10.31.110.161 – 10.31.110.174	10.31.110.175
236	10.31.110.176/28	10.31.110.177 – 10.31.110.190	10.31.110.191
237	10.31.110.192/28	10.31.110.193 – 10.31.110.206	10.31.110.207
238	10.31.110.208/28	10.31.110.209 – 10.31.110.222	10.31.110.223
239	10.31.110.224/28	10.31.110.225 – 10.31.110.238	10.31.110.239
240	10.31.110.240/28	10.31.110.241 – 10.31.110.254	10.31.110.255
241	10.31.111.0/28	10.31.111.1 – 10.31.111.14	10.31.111.15
242	10.31.111.16/28	10.31.111.17 – 10.31.111.30	10.31.111.31
243	10.31.111.32/28	10.31.111.33 – 10.31.111.46	10.31.111.47
244	10.31.111.48/28	10.31.111.49 – 10.31.111.62	10.31.111.63
245	10.31.111.64/28	10.31.111.65 – 10.31.111.78	10.31.111.79
246	10.31.111.80/28	10.31.111.81 – 10.31.111.94	10.31.111.95
247	10.31.111.96/28	10.31.111.97 – 10.31.111.110	10.31.111.111
248	10.31.111.112/28	10.31.111.113 – 10.31.111.126	10.31.111.127
249	10.31.111.128/28	10.31.111.129 – 10.31.111.142	10.31.111.143
250	10.31.111.144/28	10.31.111.145 – 10.31.111.158	10.31.111.159
251	10.31.111.160/28	10.31.111.161 – 10.31.111.174	10.31.111.175
252	10.31.111.176/28	10.31.111.177 – 10.31.111.190	10.31.111.191
253	10.31.111.192/28	10.31.111.193 – 10.31.111.206	10.31.111.207
254	10.31.111.208/28	10.31.111.209 – 10.31.111.222	10.31.111.223
255	10.31.111.224/28	10.31.111.225 – 10.31.111.238	10.31.111.239
256	10.31.111.240/28	10.31.111.241 – 10.31.111.254	10.31.111.255

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 →