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)10.25.160.0/19

network10.25.160.0/19

broadcast10.25.191.255

first host10.25.160.1

last host10.25.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.25.160.0/19

address00001010.00011001.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011001.10100000.00000000

broadcast00001010.00011001.10111111.11111111

green = network part, grey = host part

hex0x0a19a000

decimal169451520

reverse dns0.160.25.10.in-addr.arpa

ipv4-mapped::ffff:a19:a000

/19 split into /28 · 512 subnets

close ×

#	network	host range	broadcast
1	10.25.160.0/28	10.25.160.1 – 10.25.160.14	10.25.160.15
2	10.25.160.16/28	10.25.160.17 – 10.25.160.30	10.25.160.31
3	10.25.160.32/28	10.25.160.33 – 10.25.160.46	10.25.160.47
4	10.25.160.48/28	10.25.160.49 – 10.25.160.62	10.25.160.63
5	10.25.160.64/28	10.25.160.65 – 10.25.160.78	10.25.160.79
6	10.25.160.80/28	10.25.160.81 – 10.25.160.94	10.25.160.95
7	10.25.160.96/28	10.25.160.97 – 10.25.160.110	10.25.160.111
8	10.25.160.112/28	10.25.160.113 – 10.25.160.126	10.25.160.127
9	10.25.160.128/28	10.25.160.129 – 10.25.160.142	10.25.160.143
10	10.25.160.144/28	10.25.160.145 – 10.25.160.158	10.25.160.159
11	10.25.160.160/28	10.25.160.161 – 10.25.160.174	10.25.160.175
12	10.25.160.176/28	10.25.160.177 – 10.25.160.190	10.25.160.191
13	10.25.160.192/28	10.25.160.193 – 10.25.160.206	10.25.160.207
14	10.25.160.208/28	10.25.160.209 – 10.25.160.222	10.25.160.223
15	10.25.160.224/28	10.25.160.225 – 10.25.160.238	10.25.160.239
16	10.25.160.240/28	10.25.160.241 – 10.25.160.254	10.25.160.255
17	10.25.161.0/28	10.25.161.1 – 10.25.161.14	10.25.161.15
18	10.25.161.16/28	10.25.161.17 – 10.25.161.30	10.25.161.31
19	10.25.161.32/28	10.25.161.33 – 10.25.161.46	10.25.161.47
20	10.25.161.48/28	10.25.161.49 – 10.25.161.62	10.25.161.63
21	10.25.161.64/28	10.25.161.65 – 10.25.161.78	10.25.161.79
22	10.25.161.80/28	10.25.161.81 – 10.25.161.94	10.25.161.95
23	10.25.161.96/28	10.25.161.97 – 10.25.161.110	10.25.161.111
24	10.25.161.112/28	10.25.161.113 – 10.25.161.126	10.25.161.127
25	10.25.161.128/28	10.25.161.129 – 10.25.161.142	10.25.161.143
26	10.25.161.144/28	10.25.161.145 – 10.25.161.158	10.25.161.159
27	10.25.161.160/28	10.25.161.161 – 10.25.161.174	10.25.161.175
28	10.25.161.176/28	10.25.161.177 – 10.25.161.190	10.25.161.191
29	10.25.161.192/28	10.25.161.193 – 10.25.161.206	10.25.161.207
30	10.25.161.208/28	10.25.161.209 – 10.25.161.222	10.25.161.223
31	10.25.161.224/28	10.25.161.225 – 10.25.161.238	10.25.161.239
32	10.25.161.240/28	10.25.161.241 – 10.25.161.254	10.25.161.255
33	10.25.162.0/28	10.25.162.1 – 10.25.162.14	10.25.162.15
34	10.25.162.16/28	10.25.162.17 – 10.25.162.30	10.25.162.31
35	10.25.162.32/28	10.25.162.33 – 10.25.162.46	10.25.162.47
36	10.25.162.48/28	10.25.162.49 – 10.25.162.62	10.25.162.63
37	10.25.162.64/28	10.25.162.65 – 10.25.162.78	10.25.162.79
38	10.25.162.80/28	10.25.162.81 – 10.25.162.94	10.25.162.95
39	10.25.162.96/28	10.25.162.97 – 10.25.162.110	10.25.162.111
40	10.25.162.112/28	10.25.162.113 – 10.25.162.126	10.25.162.127
41	10.25.162.128/28	10.25.162.129 – 10.25.162.142	10.25.162.143
42	10.25.162.144/28	10.25.162.145 – 10.25.162.158	10.25.162.159
43	10.25.162.160/28	10.25.162.161 – 10.25.162.174	10.25.162.175
44	10.25.162.176/28	10.25.162.177 – 10.25.162.190	10.25.162.191
45	10.25.162.192/28	10.25.162.193 – 10.25.162.206	10.25.162.207
46	10.25.162.208/28	10.25.162.209 – 10.25.162.222	10.25.162.223
47	10.25.162.224/28	10.25.162.225 – 10.25.162.238	10.25.162.239
48	10.25.162.240/28	10.25.162.241 – 10.25.162.254	10.25.162.255
49	10.25.163.0/28	10.25.163.1 – 10.25.163.14	10.25.163.15
50	10.25.163.16/28	10.25.163.17 – 10.25.163.30	10.25.163.31
51	10.25.163.32/28	10.25.163.33 – 10.25.163.46	10.25.163.47
52	10.25.163.48/28	10.25.163.49 – 10.25.163.62	10.25.163.63
53	10.25.163.64/28	10.25.163.65 – 10.25.163.78	10.25.163.79
54	10.25.163.80/28	10.25.163.81 – 10.25.163.94	10.25.163.95
55	10.25.163.96/28	10.25.163.97 – 10.25.163.110	10.25.163.111
56	10.25.163.112/28	10.25.163.113 – 10.25.163.126	10.25.163.127
57	10.25.163.128/28	10.25.163.129 – 10.25.163.142	10.25.163.143
58	10.25.163.144/28	10.25.163.145 – 10.25.163.158	10.25.163.159
59	10.25.163.160/28	10.25.163.161 – 10.25.163.174	10.25.163.175
60	10.25.163.176/28	10.25.163.177 – 10.25.163.190	10.25.163.191
61	10.25.163.192/28	10.25.163.193 – 10.25.163.206	10.25.163.207
62	10.25.163.208/28	10.25.163.209 – 10.25.163.222	10.25.163.223
63	10.25.163.224/28	10.25.163.225 – 10.25.163.238	10.25.163.239
64	10.25.163.240/28	10.25.163.241 – 10.25.163.254	10.25.163.255
65	10.25.164.0/28	10.25.164.1 – 10.25.164.14	10.25.164.15
66	10.25.164.16/28	10.25.164.17 – 10.25.164.30	10.25.164.31
67	10.25.164.32/28	10.25.164.33 – 10.25.164.46	10.25.164.47
68	10.25.164.48/28	10.25.164.49 – 10.25.164.62	10.25.164.63
69	10.25.164.64/28	10.25.164.65 – 10.25.164.78	10.25.164.79
70	10.25.164.80/28	10.25.164.81 – 10.25.164.94	10.25.164.95
71	10.25.164.96/28	10.25.164.97 – 10.25.164.110	10.25.164.111
72	10.25.164.112/28	10.25.164.113 – 10.25.164.126	10.25.164.127
73	10.25.164.128/28	10.25.164.129 – 10.25.164.142	10.25.164.143
74	10.25.164.144/28	10.25.164.145 – 10.25.164.158	10.25.164.159
75	10.25.164.160/28	10.25.164.161 – 10.25.164.174	10.25.164.175
76	10.25.164.176/28	10.25.164.177 – 10.25.164.190	10.25.164.191
77	10.25.164.192/28	10.25.164.193 – 10.25.164.206	10.25.164.207
78	10.25.164.208/28	10.25.164.209 – 10.25.164.222	10.25.164.223
79	10.25.164.224/28	10.25.164.225 – 10.25.164.238	10.25.164.239
80	10.25.164.240/28	10.25.164.241 – 10.25.164.254	10.25.164.255
81	10.25.165.0/28	10.25.165.1 – 10.25.165.14	10.25.165.15
82	10.25.165.16/28	10.25.165.17 – 10.25.165.30	10.25.165.31
83	10.25.165.32/28	10.25.165.33 – 10.25.165.46	10.25.165.47
84	10.25.165.48/28	10.25.165.49 – 10.25.165.62	10.25.165.63
85	10.25.165.64/28	10.25.165.65 – 10.25.165.78	10.25.165.79
86	10.25.165.80/28	10.25.165.81 – 10.25.165.94	10.25.165.95
87	10.25.165.96/28	10.25.165.97 – 10.25.165.110	10.25.165.111
88	10.25.165.112/28	10.25.165.113 – 10.25.165.126	10.25.165.127
89	10.25.165.128/28	10.25.165.129 – 10.25.165.142	10.25.165.143
90	10.25.165.144/28	10.25.165.145 – 10.25.165.158	10.25.165.159
91	10.25.165.160/28	10.25.165.161 – 10.25.165.174	10.25.165.175
92	10.25.165.176/28	10.25.165.177 – 10.25.165.190	10.25.165.191
93	10.25.165.192/28	10.25.165.193 – 10.25.165.206	10.25.165.207
94	10.25.165.208/28	10.25.165.209 – 10.25.165.222	10.25.165.223
95	10.25.165.224/28	10.25.165.225 – 10.25.165.238	10.25.165.239
96	10.25.165.240/28	10.25.165.241 – 10.25.165.254	10.25.165.255
97	10.25.166.0/28	10.25.166.1 – 10.25.166.14	10.25.166.15
98	10.25.166.16/28	10.25.166.17 – 10.25.166.30	10.25.166.31
99	10.25.166.32/28	10.25.166.33 – 10.25.166.46	10.25.166.47
100	10.25.166.48/28	10.25.166.49 – 10.25.166.62	10.25.166.63
101	10.25.166.64/28	10.25.166.65 – 10.25.166.78	10.25.166.79
102	10.25.166.80/28	10.25.166.81 – 10.25.166.94	10.25.166.95
103	10.25.166.96/28	10.25.166.97 – 10.25.166.110	10.25.166.111
104	10.25.166.112/28	10.25.166.113 – 10.25.166.126	10.25.166.127
105	10.25.166.128/28	10.25.166.129 – 10.25.166.142	10.25.166.143
106	10.25.166.144/28	10.25.166.145 – 10.25.166.158	10.25.166.159
107	10.25.166.160/28	10.25.166.161 – 10.25.166.174	10.25.166.175
108	10.25.166.176/28	10.25.166.177 – 10.25.166.190	10.25.166.191
109	10.25.166.192/28	10.25.166.193 – 10.25.166.206	10.25.166.207
110	10.25.166.208/28	10.25.166.209 – 10.25.166.222	10.25.166.223
111	10.25.166.224/28	10.25.166.225 – 10.25.166.238	10.25.166.239
112	10.25.166.240/28	10.25.166.241 – 10.25.166.254	10.25.166.255
113	10.25.167.0/28	10.25.167.1 – 10.25.167.14	10.25.167.15
114	10.25.167.16/28	10.25.167.17 – 10.25.167.30	10.25.167.31
115	10.25.167.32/28	10.25.167.33 – 10.25.167.46	10.25.167.47
116	10.25.167.48/28	10.25.167.49 – 10.25.167.62	10.25.167.63
117	10.25.167.64/28	10.25.167.65 – 10.25.167.78	10.25.167.79
118	10.25.167.80/28	10.25.167.81 – 10.25.167.94	10.25.167.95
119	10.25.167.96/28	10.25.167.97 – 10.25.167.110	10.25.167.111
120	10.25.167.112/28	10.25.167.113 – 10.25.167.126	10.25.167.127
121	10.25.167.128/28	10.25.167.129 – 10.25.167.142	10.25.167.143
122	10.25.167.144/28	10.25.167.145 – 10.25.167.158	10.25.167.159
123	10.25.167.160/28	10.25.167.161 – 10.25.167.174	10.25.167.175
124	10.25.167.176/28	10.25.167.177 – 10.25.167.190	10.25.167.191
125	10.25.167.192/28	10.25.167.193 – 10.25.167.206	10.25.167.207
126	10.25.167.208/28	10.25.167.209 – 10.25.167.222	10.25.167.223
127	10.25.167.224/28	10.25.167.225 – 10.25.167.238	10.25.167.239
128	10.25.167.240/28	10.25.167.241 – 10.25.167.254	10.25.167.255
129	10.25.168.0/28	10.25.168.1 – 10.25.168.14	10.25.168.15
130	10.25.168.16/28	10.25.168.17 – 10.25.168.30	10.25.168.31
131	10.25.168.32/28	10.25.168.33 – 10.25.168.46	10.25.168.47
132	10.25.168.48/28	10.25.168.49 – 10.25.168.62	10.25.168.63
133	10.25.168.64/28	10.25.168.65 – 10.25.168.78	10.25.168.79
134	10.25.168.80/28	10.25.168.81 – 10.25.168.94	10.25.168.95
135	10.25.168.96/28	10.25.168.97 – 10.25.168.110	10.25.168.111
136	10.25.168.112/28	10.25.168.113 – 10.25.168.126	10.25.168.127
137	10.25.168.128/28	10.25.168.129 – 10.25.168.142	10.25.168.143
138	10.25.168.144/28	10.25.168.145 – 10.25.168.158	10.25.168.159
139	10.25.168.160/28	10.25.168.161 – 10.25.168.174	10.25.168.175
140	10.25.168.176/28	10.25.168.177 – 10.25.168.190	10.25.168.191
141	10.25.168.192/28	10.25.168.193 – 10.25.168.206	10.25.168.207
142	10.25.168.208/28	10.25.168.209 – 10.25.168.222	10.25.168.223
143	10.25.168.224/28	10.25.168.225 – 10.25.168.238	10.25.168.239
144	10.25.168.240/28	10.25.168.241 – 10.25.168.254	10.25.168.255
145	10.25.169.0/28	10.25.169.1 – 10.25.169.14	10.25.169.15
146	10.25.169.16/28	10.25.169.17 – 10.25.169.30	10.25.169.31
147	10.25.169.32/28	10.25.169.33 – 10.25.169.46	10.25.169.47
148	10.25.169.48/28	10.25.169.49 – 10.25.169.62	10.25.169.63
149	10.25.169.64/28	10.25.169.65 – 10.25.169.78	10.25.169.79
150	10.25.169.80/28	10.25.169.81 – 10.25.169.94	10.25.169.95
151	10.25.169.96/28	10.25.169.97 – 10.25.169.110	10.25.169.111
152	10.25.169.112/28	10.25.169.113 – 10.25.169.126	10.25.169.127
153	10.25.169.128/28	10.25.169.129 – 10.25.169.142	10.25.169.143
154	10.25.169.144/28	10.25.169.145 – 10.25.169.158	10.25.169.159
155	10.25.169.160/28	10.25.169.161 – 10.25.169.174	10.25.169.175
156	10.25.169.176/28	10.25.169.177 – 10.25.169.190	10.25.169.191
157	10.25.169.192/28	10.25.169.193 – 10.25.169.206	10.25.169.207
158	10.25.169.208/28	10.25.169.209 – 10.25.169.222	10.25.169.223
159	10.25.169.224/28	10.25.169.225 – 10.25.169.238	10.25.169.239
160	10.25.169.240/28	10.25.169.241 – 10.25.169.254	10.25.169.255
161	10.25.170.0/28	10.25.170.1 – 10.25.170.14	10.25.170.15
162	10.25.170.16/28	10.25.170.17 – 10.25.170.30	10.25.170.31
163	10.25.170.32/28	10.25.170.33 – 10.25.170.46	10.25.170.47
164	10.25.170.48/28	10.25.170.49 – 10.25.170.62	10.25.170.63
165	10.25.170.64/28	10.25.170.65 – 10.25.170.78	10.25.170.79
166	10.25.170.80/28	10.25.170.81 – 10.25.170.94	10.25.170.95
167	10.25.170.96/28	10.25.170.97 – 10.25.170.110	10.25.170.111
168	10.25.170.112/28	10.25.170.113 – 10.25.170.126	10.25.170.127
169	10.25.170.128/28	10.25.170.129 – 10.25.170.142	10.25.170.143
170	10.25.170.144/28	10.25.170.145 – 10.25.170.158	10.25.170.159
171	10.25.170.160/28	10.25.170.161 – 10.25.170.174	10.25.170.175
172	10.25.170.176/28	10.25.170.177 – 10.25.170.190	10.25.170.191
173	10.25.170.192/28	10.25.170.193 – 10.25.170.206	10.25.170.207
174	10.25.170.208/28	10.25.170.209 – 10.25.170.222	10.25.170.223
175	10.25.170.224/28	10.25.170.225 – 10.25.170.238	10.25.170.239
176	10.25.170.240/28	10.25.170.241 – 10.25.170.254	10.25.170.255
177	10.25.171.0/28	10.25.171.1 – 10.25.171.14	10.25.171.15
178	10.25.171.16/28	10.25.171.17 – 10.25.171.30	10.25.171.31
179	10.25.171.32/28	10.25.171.33 – 10.25.171.46	10.25.171.47
180	10.25.171.48/28	10.25.171.49 – 10.25.171.62	10.25.171.63
181	10.25.171.64/28	10.25.171.65 – 10.25.171.78	10.25.171.79
182	10.25.171.80/28	10.25.171.81 – 10.25.171.94	10.25.171.95
183	10.25.171.96/28	10.25.171.97 – 10.25.171.110	10.25.171.111
184	10.25.171.112/28	10.25.171.113 – 10.25.171.126	10.25.171.127
185	10.25.171.128/28	10.25.171.129 – 10.25.171.142	10.25.171.143
186	10.25.171.144/28	10.25.171.145 – 10.25.171.158	10.25.171.159
187	10.25.171.160/28	10.25.171.161 – 10.25.171.174	10.25.171.175
188	10.25.171.176/28	10.25.171.177 – 10.25.171.190	10.25.171.191
189	10.25.171.192/28	10.25.171.193 – 10.25.171.206	10.25.171.207
190	10.25.171.208/28	10.25.171.209 – 10.25.171.222	10.25.171.223
191	10.25.171.224/28	10.25.171.225 – 10.25.171.238	10.25.171.239
192	10.25.171.240/28	10.25.171.241 – 10.25.171.254	10.25.171.255
193	10.25.172.0/28	10.25.172.1 – 10.25.172.14	10.25.172.15
194	10.25.172.16/28	10.25.172.17 – 10.25.172.30	10.25.172.31
195	10.25.172.32/28	10.25.172.33 – 10.25.172.46	10.25.172.47
196	10.25.172.48/28	10.25.172.49 – 10.25.172.62	10.25.172.63
197	10.25.172.64/28	10.25.172.65 – 10.25.172.78	10.25.172.79
198	10.25.172.80/28	10.25.172.81 – 10.25.172.94	10.25.172.95
199	10.25.172.96/28	10.25.172.97 – 10.25.172.110	10.25.172.111
200	10.25.172.112/28	10.25.172.113 – 10.25.172.126	10.25.172.127
201	10.25.172.128/28	10.25.172.129 – 10.25.172.142	10.25.172.143
202	10.25.172.144/28	10.25.172.145 – 10.25.172.158	10.25.172.159
203	10.25.172.160/28	10.25.172.161 – 10.25.172.174	10.25.172.175
204	10.25.172.176/28	10.25.172.177 – 10.25.172.190	10.25.172.191
205	10.25.172.192/28	10.25.172.193 – 10.25.172.206	10.25.172.207
206	10.25.172.208/28	10.25.172.209 – 10.25.172.222	10.25.172.223
207	10.25.172.224/28	10.25.172.225 – 10.25.172.238	10.25.172.239
208	10.25.172.240/28	10.25.172.241 – 10.25.172.254	10.25.172.255
209	10.25.173.0/28	10.25.173.1 – 10.25.173.14	10.25.173.15
210	10.25.173.16/28	10.25.173.17 – 10.25.173.30	10.25.173.31
211	10.25.173.32/28	10.25.173.33 – 10.25.173.46	10.25.173.47
212	10.25.173.48/28	10.25.173.49 – 10.25.173.62	10.25.173.63
213	10.25.173.64/28	10.25.173.65 – 10.25.173.78	10.25.173.79
214	10.25.173.80/28	10.25.173.81 – 10.25.173.94	10.25.173.95
215	10.25.173.96/28	10.25.173.97 – 10.25.173.110	10.25.173.111
216	10.25.173.112/28	10.25.173.113 – 10.25.173.126	10.25.173.127
217	10.25.173.128/28	10.25.173.129 – 10.25.173.142	10.25.173.143
218	10.25.173.144/28	10.25.173.145 – 10.25.173.158	10.25.173.159
219	10.25.173.160/28	10.25.173.161 – 10.25.173.174	10.25.173.175
220	10.25.173.176/28	10.25.173.177 – 10.25.173.190	10.25.173.191
221	10.25.173.192/28	10.25.173.193 – 10.25.173.206	10.25.173.207
222	10.25.173.208/28	10.25.173.209 – 10.25.173.222	10.25.173.223
223	10.25.173.224/28	10.25.173.225 – 10.25.173.238	10.25.173.239
224	10.25.173.240/28	10.25.173.241 – 10.25.173.254	10.25.173.255
225	10.25.174.0/28	10.25.174.1 – 10.25.174.14	10.25.174.15
226	10.25.174.16/28	10.25.174.17 – 10.25.174.30	10.25.174.31
227	10.25.174.32/28	10.25.174.33 – 10.25.174.46	10.25.174.47
228	10.25.174.48/28	10.25.174.49 – 10.25.174.62	10.25.174.63
229	10.25.174.64/28	10.25.174.65 – 10.25.174.78	10.25.174.79
230	10.25.174.80/28	10.25.174.81 – 10.25.174.94	10.25.174.95
231	10.25.174.96/28	10.25.174.97 – 10.25.174.110	10.25.174.111
232	10.25.174.112/28	10.25.174.113 – 10.25.174.126	10.25.174.127
233	10.25.174.128/28	10.25.174.129 – 10.25.174.142	10.25.174.143
234	10.25.174.144/28	10.25.174.145 – 10.25.174.158	10.25.174.159
235	10.25.174.160/28	10.25.174.161 – 10.25.174.174	10.25.174.175
236	10.25.174.176/28	10.25.174.177 – 10.25.174.190	10.25.174.191
237	10.25.174.192/28	10.25.174.193 – 10.25.174.206	10.25.174.207
238	10.25.174.208/28	10.25.174.209 – 10.25.174.222	10.25.174.223
239	10.25.174.224/28	10.25.174.225 – 10.25.174.238	10.25.174.239
240	10.25.174.240/28	10.25.174.241 – 10.25.174.254	10.25.174.255
241	10.25.175.0/28	10.25.175.1 – 10.25.175.14	10.25.175.15
242	10.25.175.16/28	10.25.175.17 – 10.25.175.30	10.25.175.31
243	10.25.175.32/28	10.25.175.33 – 10.25.175.46	10.25.175.47
244	10.25.175.48/28	10.25.175.49 – 10.25.175.62	10.25.175.63
245	10.25.175.64/28	10.25.175.65 – 10.25.175.78	10.25.175.79
246	10.25.175.80/28	10.25.175.81 – 10.25.175.94	10.25.175.95
247	10.25.175.96/28	10.25.175.97 – 10.25.175.110	10.25.175.111
248	10.25.175.112/28	10.25.175.113 – 10.25.175.126	10.25.175.127
249	10.25.175.128/28	10.25.175.129 – 10.25.175.142	10.25.175.143
250	10.25.175.144/28	10.25.175.145 – 10.25.175.158	10.25.175.159
251	10.25.175.160/28	10.25.175.161 – 10.25.175.174	10.25.175.175
252	10.25.175.176/28	10.25.175.177 – 10.25.175.190	10.25.175.191
253	10.25.175.192/28	10.25.175.193 – 10.25.175.206	10.25.175.207
254	10.25.175.208/28	10.25.175.209 – 10.25.175.222	10.25.175.223
255	10.25.175.224/28	10.25.175.225 – 10.25.175.238	10.25.175.239
256	10.25.175.240/28	10.25.175.241 – 10.25.175.254	10.25.175.255

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 →