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 /29 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.31.96.0/29	10.31.96.1 – 10.31.96.6	10.31.96.7
2	10.31.96.8/29	10.31.96.9 – 10.31.96.14	10.31.96.15
3	10.31.96.16/29	10.31.96.17 – 10.31.96.22	10.31.96.23
4	10.31.96.24/29	10.31.96.25 – 10.31.96.30	10.31.96.31
5	10.31.96.32/29	10.31.96.33 – 10.31.96.38	10.31.96.39
6	10.31.96.40/29	10.31.96.41 – 10.31.96.46	10.31.96.47
7	10.31.96.48/29	10.31.96.49 – 10.31.96.54	10.31.96.55
8	10.31.96.56/29	10.31.96.57 – 10.31.96.62	10.31.96.63
9	10.31.96.64/29	10.31.96.65 – 10.31.96.70	10.31.96.71
10	10.31.96.72/29	10.31.96.73 – 10.31.96.78	10.31.96.79
11	10.31.96.80/29	10.31.96.81 – 10.31.96.86	10.31.96.87
12	10.31.96.88/29	10.31.96.89 – 10.31.96.94	10.31.96.95
13	10.31.96.96/29	10.31.96.97 – 10.31.96.102	10.31.96.103
14	10.31.96.104/29	10.31.96.105 – 10.31.96.110	10.31.96.111
15	10.31.96.112/29	10.31.96.113 – 10.31.96.118	10.31.96.119
16	10.31.96.120/29	10.31.96.121 – 10.31.96.126	10.31.96.127
17	10.31.96.128/29	10.31.96.129 – 10.31.96.134	10.31.96.135
18	10.31.96.136/29	10.31.96.137 – 10.31.96.142	10.31.96.143
19	10.31.96.144/29	10.31.96.145 – 10.31.96.150	10.31.96.151
20	10.31.96.152/29	10.31.96.153 – 10.31.96.158	10.31.96.159
21	10.31.96.160/29	10.31.96.161 – 10.31.96.166	10.31.96.167
22	10.31.96.168/29	10.31.96.169 – 10.31.96.174	10.31.96.175
23	10.31.96.176/29	10.31.96.177 – 10.31.96.182	10.31.96.183
24	10.31.96.184/29	10.31.96.185 – 10.31.96.190	10.31.96.191
25	10.31.96.192/29	10.31.96.193 – 10.31.96.198	10.31.96.199
26	10.31.96.200/29	10.31.96.201 – 10.31.96.206	10.31.96.207
27	10.31.96.208/29	10.31.96.209 – 10.31.96.214	10.31.96.215
28	10.31.96.216/29	10.31.96.217 – 10.31.96.222	10.31.96.223
29	10.31.96.224/29	10.31.96.225 – 10.31.96.230	10.31.96.231
30	10.31.96.232/29	10.31.96.233 – 10.31.96.238	10.31.96.239
31	10.31.96.240/29	10.31.96.241 – 10.31.96.246	10.31.96.247
32	10.31.96.248/29	10.31.96.249 – 10.31.96.254	10.31.96.255
33	10.31.97.0/29	10.31.97.1 – 10.31.97.6	10.31.97.7
34	10.31.97.8/29	10.31.97.9 – 10.31.97.14	10.31.97.15
35	10.31.97.16/29	10.31.97.17 – 10.31.97.22	10.31.97.23
36	10.31.97.24/29	10.31.97.25 – 10.31.97.30	10.31.97.31
37	10.31.97.32/29	10.31.97.33 – 10.31.97.38	10.31.97.39
38	10.31.97.40/29	10.31.97.41 – 10.31.97.46	10.31.97.47
39	10.31.97.48/29	10.31.97.49 – 10.31.97.54	10.31.97.55
40	10.31.97.56/29	10.31.97.57 – 10.31.97.62	10.31.97.63
41	10.31.97.64/29	10.31.97.65 – 10.31.97.70	10.31.97.71
42	10.31.97.72/29	10.31.97.73 – 10.31.97.78	10.31.97.79
43	10.31.97.80/29	10.31.97.81 – 10.31.97.86	10.31.97.87
44	10.31.97.88/29	10.31.97.89 – 10.31.97.94	10.31.97.95
45	10.31.97.96/29	10.31.97.97 – 10.31.97.102	10.31.97.103
46	10.31.97.104/29	10.31.97.105 – 10.31.97.110	10.31.97.111
47	10.31.97.112/29	10.31.97.113 – 10.31.97.118	10.31.97.119
48	10.31.97.120/29	10.31.97.121 – 10.31.97.126	10.31.97.127
49	10.31.97.128/29	10.31.97.129 – 10.31.97.134	10.31.97.135
50	10.31.97.136/29	10.31.97.137 – 10.31.97.142	10.31.97.143
51	10.31.97.144/29	10.31.97.145 – 10.31.97.150	10.31.97.151
52	10.31.97.152/29	10.31.97.153 – 10.31.97.158	10.31.97.159
53	10.31.97.160/29	10.31.97.161 – 10.31.97.166	10.31.97.167
54	10.31.97.168/29	10.31.97.169 – 10.31.97.174	10.31.97.175
55	10.31.97.176/29	10.31.97.177 – 10.31.97.182	10.31.97.183
56	10.31.97.184/29	10.31.97.185 – 10.31.97.190	10.31.97.191
57	10.31.97.192/29	10.31.97.193 – 10.31.97.198	10.31.97.199
58	10.31.97.200/29	10.31.97.201 – 10.31.97.206	10.31.97.207
59	10.31.97.208/29	10.31.97.209 – 10.31.97.214	10.31.97.215
60	10.31.97.216/29	10.31.97.217 – 10.31.97.222	10.31.97.223
61	10.31.97.224/29	10.31.97.225 – 10.31.97.230	10.31.97.231
62	10.31.97.232/29	10.31.97.233 – 10.31.97.238	10.31.97.239
63	10.31.97.240/29	10.31.97.241 – 10.31.97.246	10.31.97.247
64	10.31.97.248/29	10.31.97.249 – 10.31.97.254	10.31.97.255
65	10.31.98.0/29	10.31.98.1 – 10.31.98.6	10.31.98.7
66	10.31.98.8/29	10.31.98.9 – 10.31.98.14	10.31.98.15
67	10.31.98.16/29	10.31.98.17 – 10.31.98.22	10.31.98.23
68	10.31.98.24/29	10.31.98.25 – 10.31.98.30	10.31.98.31
69	10.31.98.32/29	10.31.98.33 – 10.31.98.38	10.31.98.39
70	10.31.98.40/29	10.31.98.41 – 10.31.98.46	10.31.98.47
71	10.31.98.48/29	10.31.98.49 – 10.31.98.54	10.31.98.55
72	10.31.98.56/29	10.31.98.57 – 10.31.98.62	10.31.98.63
73	10.31.98.64/29	10.31.98.65 – 10.31.98.70	10.31.98.71
74	10.31.98.72/29	10.31.98.73 – 10.31.98.78	10.31.98.79
75	10.31.98.80/29	10.31.98.81 – 10.31.98.86	10.31.98.87
76	10.31.98.88/29	10.31.98.89 – 10.31.98.94	10.31.98.95
77	10.31.98.96/29	10.31.98.97 – 10.31.98.102	10.31.98.103
78	10.31.98.104/29	10.31.98.105 – 10.31.98.110	10.31.98.111
79	10.31.98.112/29	10.31.98.113 – 10.31.98.118	10.31.98.119
80	10.31.98.120/29	10.31.98.121 – 10.31.98.126	10.31.98.127
81	10.31.98.128/29	10.31.98.129 – 10.31.98.134	10.31.98.135
82	10.31.98.136/29	10.31.98.137 – 10.31.98.142	10.31.98.143
83	10.31.98.144/29	10.31.98.145 – 10.31.98.150	10.31.98.151
84	10.31.98.152/29	10.31.98.153 – 10.31.98.158	10.31.98.159
85	10.31.98.160/29	10.31.98.161 – 10.31.98.166	10.31.98.167
86	10.31.98.168/29	10.31.98.169 – 10.31.98.174	10.31.98.175
87	10.31.98.176/29	10.31.98.177 – 10.31.98.182	10.31.98.183
88	10.31.98.184/29	10.31.98.185 – 10.31.98.190	10.31.98.191
89	10.31.98.192/29	10.31.98.193 – 10.31.98.198	10.31.98.199
90	10.31.98.200/29	10.31.98.201 – 10.31.98.206	10.31.98.207
91	10.31.98.208/29	10.31.98.209 – 10.31.98.214	10.31.98.215
92	10.31.98.216/29	10.31.98.217 – 10.31.98.222	10.31.98.223
93	10.31.98.224/29	10.31.98.225 – 10.31.98.230	10.31.98.231
94	10.31.98.232/29	10.31.98.233 – 10.31.98.238	10.31.98.239
95	10.31.98.240/29	10.31.98.241 – 10.31.98.246	10.31.98.247
96	10.31.98.248/29	10.31.98.249 – 10.31.98.254	10.31.98.255
97	10.31.99.0/29	10.31.99.1 – 10.31.99.6	10.31.99.7
98	10.31.99.8/29	10.31.99.9 – 10.31.99.14	10.31.99.15
99	10.31.99.16/29	10.31.99.17 – 10.31.99.22	10.31.99.23
100	10.31.99.24/29	10.31.99.25 – 10.31.99.30	10.31.99.31
101	10.31.99.32/29	10.31.99.33 – 10.31.99.38	10.31.99.39
102	10.31.99.40/29	10.31.99.41 – 10.31.99.46	10.31.99.47
103	10.31.99.48/29	10.31.99.49 – 10.31.99.54	10.31.99.55
104	10.31.99.56/29	10.31.99.57 – 10.31.99.62	10.31.99.63
105	10.31.99.64/29	10.31.99.65 – 10.31.99.70	10.31.99.71
106	10.31.99.72/29	10.31.99.73 – 10.31.99.78	10.31.99.79
107	10.31.99.80/29	10.31.99.81 – 10.31.99.86	10.31.99.87
108	10.31.99.88/29	10.31.99.89 – 10.31.99.94	10.31.99.95
109	10.31.99.96/29	10.31.99.97 – 10.31.99.102	10.31.99.103
110	10.31.99.104/29	10.31.99.105 – 10.31.99.110	10.31.99.111
111	10.31.99.112/29	10.31.99.113 – 10.31.99.118	10.31.99.119
112	10.31.99.120/29	10.31.99.121 – 10.31.99.126	10.31.99.127
113	10.31.99.128/29	10.31.99.129 – 10.31.99.134	10.31.99.135
114	10.31.99.136/29	10.31.99.137 – 10.31.99.142	10.31.99.143
115	10.31.99.144/29	10.31.99.145 – 10.31.99.150	10.31.99.151
116	10.31.99.152/29	10.31.99.153 – 10.31.99.158	10.31.99.159
117	10.31.99.160/29	10.31.99.161 – 10.31.99.166	10.31.99.167
118	10.31.99.168/29	10.31.99.169 – 10.31.99.174	10.31.99.175
119	10.31.99.176/29	10.31.99.177 – 10.31.99.182	10.31.99.183
120	10.31.99.184/29	10.31.99.185 – 10.31.99.190	10.31.99.191
121	10.31.99.192/29	10.31.99.193 – 10.31.99.198	10.31.99.199
122	10.31.99.200/29	10.31.99.201 – 10.31.99.206	10.31.99.207
123	10.31.99.208/29	10.31.99.209 – 10.31.99.214	10.31.99.215
124	10.31.99.216/29	10.31.99.217 – 10.31.99.222	10.31.99.223
125	10.31.99.224/29	10.31.99.225 – 10.31.99.230	10.31.99.231
126	10.31.99.232/29	10.31.99.233 – 10.31.99.238	10.31.99.239
127	10.31.99.240/29	10.31.99.241 – 10.31.99.246	10.31.99.247
128	10.31.99.248/29	10.31.99.249 – 10.31.99.254	10.31.99.255
129	10.31.100.0/29	10.31.100.1 – 10.31.100.6	10.31.100.7
130	10.31.100.8/29	10.31.100.9 – 10.31.100.14	10.31.100.15
131	10.31.100.16/29	10.31.100.17 – 10.31.100.22	10.31.100.23
132	10.31.100.24/29	10.31.100.25 – 10.31.100.30	10.31.100.31
133	10.31.100.32/29	10.31.100.33 – 10.31.100.38	10.31.100.39
134	10.31.100.40/29	10.31.100.41 – 10.31.100.46	10.31.100.47
135	10.31.100.48/29	10.31.100.49 – 10.31.100.54	10.31.100.55
136	10.31.100.56/29	10.31.100.57 – 10.31.100.62	10.31.100.63
137	10.31.100.64/29	10.31.100.65 – 10.31.100.70	10.31.100.71
138	10.31.100.72/29	10.31.100.73 – 10.31.100.78	10.31.100.79
139	10.31.100.80/29	10.31.100.81 – 10.31.100.86	10.31.100.87
140	10.31.100.88/29	10.31.100.89 – 10.31.100.94	10.31.100.95
141	10.31.100.96/29	10.31.100.97 – 10.31.100.102	10.31.100.103
142	10.31.100.104/29	10.31.100.105 – 10.31.100.110	10.31.100.111
143	10.31.100.112/29	10.31.100.113 – 10.31.100.118	10.31.100.119
144	10.31.100.120/29	10.31.100.121 – 10.31.100.126	10.31.100.127
145	10.31.100.128/29	10.31.100.129 – 10.31.100.134	10.31.100.135
146	10.31.100.136/29	10.31.100.137 – 10.31.100.142	10.31.100.143
147	10.31.100.144/29	10.31.100.145 – 10.31.100.150	10.31.100.151
148	10.31.100.152/29	10.31.100.153 – 10.31.100.158	10.31.100.159
149	10.31.100.160/29	10.31.100.161 – 10.31.100.166	10.31.100.167
150	10.31.100.168/29	10.31.100.169 – 10.31.100.174	10.31.100.175
151	10.31.100.176/29	10.31.100.177 – 10.31.100.182	10.31.100.183
152	10.31.100.184/29	10.31.100.185 – 10.31.100.190	10.31.100.191
153	10.31.100.192/29	10.31.100.193 – 10.31.100.198	10.31.100.199
154	10.31.100.200/29	10.31.100.201 – 10.31.100.206	10.31.100.207
155	10.31.100.208/29	10.31.100.209 – 10.31.100.214	10.31.100.215
156	10.31.100.216/29	10.31.100.217 – 10.31.100.222	10.31.100.223
157	10.31.100.224/29	10.31.100.225 – 10.31.100.230	10.31.100.231
158	10.31.100.232/29	10.31.100.233 – 10.31.100.238	10.31.100.239
159	10.31.100.240/29	10.31.100.241 – 10.31.100.246	10.31.100.247
160	10.31.100.248/29	10.31.100.249 – 10.31.100.254	10.31.100.255
161	10.31.101.0/29	10.31.101.1 – 10.31.101.6	10.31.101.7
162	10.31.101.8/29	10.31.101.9 – 10.31.101.14	10.31.101.15
163	10.31.101.16/29	10.31.101.17 – 10.31.101.22	10.31.101.23
164	10.31.101.24/29	10.31.101.25 – 10.31.101.30	10.31.101.31
165	10.31.101.32/29	10.31.101.33 – 10.31.101.38	10.31.101.39
166	10.31.101.40/29	10.31.101.41 – 10.31.101.46	10.31.101.47
167	10.31.101.48/29	10.31.101.49 – 10.31.101.54	10.31.101.55
168	10.31.101.56/29	10.31.101.57 – 10.31.101.62	10.31.101.63
169	10.31.101.64/29	10.31.101.65 – 10.31.101.70	10.31.101.71
170	10.31.101.72/29	10.31.101.73 – 10.31.101.78	10.31.101.79
171	10.31.101.80/29	10.31.101.81 – 10.31.101.86	10.31.101.87
172	10.31.101.88/29	10.31.101.89 – 10.31.101.94	10.31.101.95
173	10.31.101.96/29	10.31.101.97 – 10.31.101.102	10.31.101.103
174	10.31.101.104/29	10.31.101.105 – 10.31.101.110	10.31.101.111
175	10.31.101.112/29	10.31.101.113 – 10.31.101.118	10.31.101.119
176	10.31.101.120/29	10.31.101.121 – 10.31.101.126	10.31.101.127
177	10.31.101.128/29	10.31.101.129 – 10.31.101.134	10.31.101.135
178	10.31.101.136/29	10.31.101.137 – 10.31.101.142	10.31.101.143
179	10.31.101.144/29	10.31.101.145 – 10.31.101.150	10.31.101.151
180	10.31.101.152/29	10.31.101.153 – 10.31.101.158	10.31.101.159
181	10.31.101.160/29	10.31.101.161 – 10.31.101.166	10.31.101.167
182	10.31.101.168/29	10.31.101.169 – 10.31.101.174	10.31.101.175
183	10.31.101.176/29	10.31.101.177 – 10.31.101.182	10.31.101.183
184	10.31.101.184/29	10.31.101.185 – 10.31.101.190	10.31.101.191
185	10.31.101.192/29	10.31.101.193 – 10.31.101.198	10.31.101.199
186	10.31.101.200/29	10.31.101.201 – 10.31.101.206	10.31.101.207
187	10.31.101.208/29	10.31.101.209 – 10.31.101.214	10.31.101.215
188	10.31.101.216/29	10.31.101.217 – 10.31.101.222	10.31.101.223
189	10.31.101.224/29	10.31.101.225 – 10.31.101.230	10.31.101.231
190	10.31.101.232/29	10.31.101.233 – 10.31.101.238	10.31.101.239
191	10.31.101.240/29	10.31.101.241 – 10.31.101.246	10.31.101.247
192	10.31.101.248/29	10.31.101.249 – 10.31.101.254	10.31.101.255
193	10.31.102.0/29	10.31.102.1 – 10.31.102.6	10.31.102.7
194	10.31.102.8/29	10.31.102.9 – 10.31.102.14	10.31.102.15
195	10.31.102.16/29	10.31.102.17 – 10.31.102.22	10.31.102.23
196	10.31.102.24/29	10.31.102.25 – 10.31.102.30	10.31.102.31
197	10.31.102.32/29	10.31.102.33 – 10.31.102.38	10.31.102.39
198	10.31.102.40/29	10.31.102.41 – 10.31.102.46	10.31.102.47
199	10.31.102.48/29	10.31.102.49 – 10.31.102.54	10.31.102.55
200	10.31.102.56/29	10.31.102.57 – 10.31.102.62	10.31.102.63
201	10.31.102.64/29	10.31.102.65 – 10.31.102.70	10.31.102.71
202	10.31.102.72/29	10.31.102.73 – 10.31.102.78	10.31.102.79
203	10.31.102.80/29	10.31.102.81 – 10.31.102.86	10.31.102.87
204	10.31.102.88/29	10.31.102.89 – 10.31.102.94	10.31.102.95
205	10.31.102.96/29	10.31.102.97 – 10.31.102.102	10.31.102.103
206	10.31.102.104/29	10.31.102.105 – 10.31.102.110	10.31.102.111
207	10.31.102.112/29	10.31.102.113 – 10.31.102.118	10.31.102.119
208	10.31.102.120/29	10.31.102.121 – 10.31.102.126	10.31.102.127
209	10.31.102.128/29	10.31.102.129 – 10.31.102.134	10.31.102.135
210	10.31.102.136/29	10.31.102.137 – 10.31.102.142	10.31.102.143
211	10.31.102.144/29	10.31.102.145 – 10.31.102.150	10.31.102.151
212	10.31.102.152/29	10.31.102.153 – 10.31.102.158	10.31.102.159
213	10.31.102.160/29	10.31.102.161 – 10.31.102.166	10.31.102.167
214	10.31.102.168/29	10.31.102.169 – 10.31.102.174	10.31.102.175
215	10.31.102.176/29	10.31.102.177 – 10.31.102.182	10.31.102.183
216	10.31.102.184/29	10.31.102.185 – 10.31.102.190	10.31.102.191
217	10.31.102.192/29	10.31.102.193 – 10.31.102.198	10.31.102.199
218	10.31.102.200/29	10.31.102.201 – 10.31.102.206	10.31.102.207
219	10.31.102.208/29	10.31.102.209 – 10.31.102.214	10.31.102.215
220	10.31.102.216/29	10.31.102.217 – 10.31.102.222	10.31.102.223
221	10.31.102.224/29	10.31.102.225 – 10.31.102.230	10.31.102.231
222	10.31.102.232/29	10.31.102.233 – 10.31.102.238	10.31.102.239
223	10.31.102.240/29	10.31.102.241 – 10.31.102.246	10.31.102.247
224	10.31.102.248/29	10.31.102.249 – 10.31.102.254	10.31.102.255
225	10.31.103.0/29	10.31.103.1 – 10.31.103.6	10.31.103.7
226	10.31.103.8/29	10.31.103.9 – 10.31.103.14	10.31.103.15
227	10.31.103.16/29	10.31.103.17 – 10.31.103.22	10.31.103.23
228	10.31.103.24/29	10.31.103.25 – 10.31.103.30	10.31.103.31
229	10.31.103.32/29	10.31.103.33 – 10.31.103.38	10.31.103.39
230	10.31.103.40/29	10.31.103.41 – 10.31.103.46	10.31.103.47
231	10.31.103.48/29	10.31.103.49 – 10.31.103.54	10.31.103.55
232	10.31.103.56/29	10.31.103.57 – 10.31.103.62	10.31.103.63
233	10.31.103.64/29	10.31.103.65 – 10.31.103.70	10.31.103.71
234	10.31.103.72/29	10.31.103.73 – 10.31.103.78	10.31.103.79
235	10.31.103.80/29	10.31.103.81 – 10.31.103.86	10.31.103.87
236	10.31.103.88/29	10.31.103.89 – 10.31.103.94	10.31.103.95
237	10.31.103.96/29	10.31.103.97 – 10.31.103.102	10.31.103.103
238	10.31.103.104/29	10.31.103.105 – 10.31.103.110	10.31.103.111
239	10.31.103.112/29	10.31.103.113 – 10.31.103.118	10.31.103.119
240	10.31.103.120/29	10.31.103.121 – 10.31.103.126	10.31.103.127
241	10.31.103.128/29	10.31.103.129 – 10.31.103.134	10.31.103.135
242	10.31.103.136/29	10.31.103.137 – 10.31.103.142	10.31.103.143
243	10.31.103.144/29	10.31.103.145 – 10.31.103.150	10.31.103.151
244	10.31.103.152/29	10.31.103.153 – 10.31.103.158	10.31.103.159
245	10.31.103.160/29	10.31.103.161 – 10.31.103.166	10.31.103.167
246	10.31.103.168/29	10.31.103.169 – 10.31.103.174	10.31.103.175
247	10.31.103.176/29	10.31.103.177 – 10.31.103.182	10.31.103.183
248	10.31.103.184/29	10.31.103.185 – 10.31.103.190	10.31.103.191
249	10.31.103.192/29	10.31.103.193 – 10.31.103.198	10.31.103.199
250	10.31.103.200/29	10.31.103.201 – 10.31.103.206	10.31.103.207
251	10.31.103.208/29	10.31.103.209 – 10.31.103.214	10.31.103.215
252	10.31.103.216/29	10.31.103.217 – 10.31.103.222	10.31.103.223
253	10.31.103.224/29	10.31.103.225 – 10.31.103.230	10.31.103.231
254	10.31.103.232/29	10.31.103.233 – 10.31.103.238	10.31.103.239
255	10.31.103.240/29	10.31.103.241 – 10.31.103.246	10.31.103.247
256	10.31.103.248/29	10.31.103.249 – 10.31.103.254	10.31.103.255

showing 256 of 1,024

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 →