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)10.78.96.0/19

network10.78.96.0/19

broadcast10.78.127.255

first host10.78.96.1

last host10.78.127.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.78.96.0/19

address00001010.01001110.01100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.01001110.01100000.00000000

broadcast00001010.01001110.01111111.11111111

green = network part, grey = host part

hex0x0a4e6000

decimal172908544

reverse dns0.96.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:6000

/19 split into /30 · 2,048 subnets

close ×

#	network	host range	broadcast
1	10.78.96.0/30	10.78.96.1 – 10.78.96.2	10.78.96.3
2	10.78.96.4/30	10.78.96.5 – 10.78.96.6	10.78.96.7
3	10.78.96.8/30	10.78.96.9 – 10.78.96.10	10.78.96.11
4	10.78.96.12/30	10.78.96.13 – 10.78.96.14	10.78.96.15
5	10.78.96.16/30	10.78.96.17 – 10.78.96.18	10.78.96.19
6	10.78.96.20/30	10.78.96.21 – 10.78.96.22	10.78.96.23
7	10.78.96.24/30	10.78.96.25 – 10.78.96.26	10.78.96.27
8	10.78.96.28/30	10.78.96.29 – 10.78.96.30	10.78.96.31
9	10.78.96.32/30	10.78.96.33 – 10.78.96.34	10.78.96.35
10	10.78.96.36/30	10.78.96.37 – 10.78.96.38	10.78.96.39
11	10.78.96.40/30	10.78.96.41 – 10.78.96.42	10.78.96.43
12	10.78.96.44/30	10.78.96.45 – 10.78.96.46	10.78.96.47
13	10.78.96.48/30	10.78.96.49 – 10.78.96.50	10.78.96.51
14	10.78.96.52/30	10.78.96.53 – 10.78.96.54	10.78.96.55
15	10.78.96.56/30	10.78.96.57 – 10.78.96.58	10.78.96.59
16	10.78.96.60/30	10.78.96.61 – 10.78.96.62	10.78.96.63
17	10.78.96.64/30	10.78.96.65 – 10.78.96.66	10.78.96.67
18	10.78.96.68/30	10.78.96.69 – 10.78.96.70	10.78.96.71
19	10.78.96.72/30	10.78.96.73 – 10.78.96.74	10.78.96.75
20	10.78.96.76/30	10.78.96.77 – 10.78.96.78	10.78.96.79
21	10.78.96.80/30	10.78.96.81 – 10.78.96.82	10.78.96.83
22	10.78.96.84/30	10.78.96.85 – 10.78.96.86	10.78.96.87
23	10.78.96.88/30	10.78.96.89 – 10.78.96.90	10.78.96.91
24	10.78.96.92/30	10.78.96.93 – 10.78.96.94	10.78.96.95
25	10.78.96.96/30	10.78.96.97 – 10.78.96.98	10.78.96.99
26	10.78.96.100/30	10.78.96.101 – 10.78.96.102	10.78.96.103
27	10.78.96.104/30	10.78.96.105 – 10.78.96.106	10.78.96.107
28	10.78.96.108/30	10.78.96.109 – 10.78.96.110	10.78.96.111
29	10.78.96.112/30	10.78.96.113 – 10.78.96.114	10.78.96.115
30	10.78.96.116/30	10.78.96.117 – 10.78.96.118	10.78.96.119
31	10.78.96.120/30	10.78.96.121 – 10.78.96.122	10.78.96.123
32	10.78.96.124/30	10.78.96.125 – 10.78.96.126	10.78.96.127
33	10.78.96.128/30	10.78.96.129 – 10.78.96.130	10.78.96.131
34	10.78.96.132/30	10.78.96.133 – 10.78.96.134	10.78.96.135
35	10.78.96.136/30	10.78.96.137 – 10.78.96.138	10.78.96.139
36	10.78.96.140/30	10.78.96.141 – 10.78.96.142	10.78.96.143
37	10.78.96.144/30	10.78.96.145 – 10.78.96.146	10.78.96.147
38	10.78.96.148/30	10.78.96.149 – 10.78.96.150	10.78.96.151
39	10.78.96.152/30	10.78.96.153 – 10.78.96.154	10.78.96.155
40	10.78.96.156/30	10.78.96.157 – 10.78.96.158	10.78.96.159
41	10.78.96.160/30	10.78.96.161 – 10.78.96.162	10.78.96.163
42	10.78.96.164/30	10.78.96.165 – 10.78.96.166	10.78.96.167
43	10.78.96.168/30	10.78.96.169 – 10.78.96.170	10.78.96.171
44	10.78.96.172/30	10.78.96.173 – 10.78.96.174	10.78.96.175
45	10.78.96.176/30	10.78.96.177 – 10.78.96.178	10.78.96.179
46	10.78.96.180/30	10.78.96.181 – 10.78.96.182	10.78.96.183
47	10.78.96.184/30	10.78.96.185 – 10.78.96.186	10.78.96.187
48	10.78.96.188/30	10.78.96.189 – 10.78.96.190	10.78.96.191
49	10.78.96.192/30	10.78.96.193 – 10.78.96.194	10.78.96.195
50	10.78.96.196/30	10.78.96.197 – 10.78.96.198	10.78.96.199
51	10.78.96.200/30	10.78.96.201 – 10.78.96.202	10.78.96.203
52	10.78.96.204/30	10.78.96.205 – 10.78.96.206	10.78.96.207
53	10.78.96.208/30	10.78.96.209 – 10.78.96.210	10.78.96.211
54	10.78.96.212/30	10.78.96.213 – 10.78.96.214	10.78.96.215
55	10.78.96.216/30	10.78.96.217 – 10.78.96.218	10.78.96.219
56	10.78.96.220/30	10.78.96.221 – 10.78.96.222	10.78.96.223
57	10.78.96.224/30	10.78.96.225 – 10.78.96.226	10.78.96.227
58	10.78.96.228/30	10.78.96.229 – 10.78.96.230	10.78.96.231
59	10.78.96.232/30	10.78.96.233 – 10.78.96.234	10.78.96.235
60	10.78.96.236/30	10.78.96.237 – 10.78.96.238	10.78.96.239
61	10.78.96.240/30	10.78.96.241 – 10.78.96.242	10.78.96.243
62	10.78.96.244/30	10.78.96.245 – 10.78.96.246	10.78.96.247
63	10.78.96.248/30	10.78.96.249 – 10.78.96.250	10.78.96.251
64	10.78.96.252/30	10.78.96.253 – 10.78.96.254	10.78.96.255
65	10.78.97.0/30	10.78.97.1 – 10.78.97.2	10.78.97.3
66	10.78.97.4/30	10.78.97.5 – 10.78.97.6	10.78.97.7
67	10.78.97.8/30	10.78.97.9 – 10.78.97.10	10.78.97.11
68	10.78.97.12/30	10.78.97.13 – 10.78.97.14	10.78.97.15
69	10.78.97.16/30	10.78.97.17 – 10.78.97.18	10.78.97.19
70	10.78.97.20/30	10.78.97.21 – 10.78.97.22	10.78.97.23
71	10.78.97.24/30	10.78.97.25 – 10.78.97.26	10.78.97.27
72	10.78.97.28/30	10.78.97.29 – 10.78.97.30	10.78.97.31
73	10.78.97.32/30	10.78.97.33 – 10.78.97.34	10.78.97.35
74	10.78.97.36/30	10.78.97.37 – 10.78.97.38	10.78.97.39
75	10.78.97.40/30	10.78.97.41 – 10.78.97.42	10.78.97.43
76	10.78.97.44/30	10.78.97.45 – 10.78.97.46	10.78.97.47
77	10.78.97.48/30	10.78.97.49 – 10.78.97.50	10.78.97.51
78	10.78.97.52/30	10.78.97.53 – 10.78.97.54	10.78.97.55
79	10.78.97.56/30	10.78.97.57 – 10.78.97.58	10.78.97.59
80	10.78.97.60/30	10.78.97.61 – 10.78.97.62	10.78.97.63
81	10.78.97.64/30	10.78.97.65 – 10.78.97.66	10.78.97.67
82	10.78.97.68/30	10.78.97.69 – 10.78.97.70	10.78.97.71
83	10.78.97.72/30	10.78.97.73 – 10.78.97.74	10.78.97.75
84	10.78.97.76/30	10.78.97.77 – 10.78.97.78	10.78.97.79
85	10.78.97.80/30	10.78.97.81 – 10.78.97.82	10.78.97.83
86	10.78.97.84/30	10.78.97.85 – 10.78.97.86	10.78.97.87
87	10.78.97.88/30	10.78.97.89 – 10.78.97.90	10.78.97.91
88	10.78.97.92/30	10.78.97.93 – 10.78.97.94	10.78.97.95
89	10.78.97.96/30	10.78.97.97 – 10.78.97.98	10.78.97.99
90	10.78.97.100/30	10.78.97.101 – 10.78.97.102	10.78.97.103
91	10.78.97.104/30	10.78.97.105 – 10.78.97.106	10.78.97.107
92	10.78.97.108/30	10.78.97.109 – 10.78.97.110	10.78.97.111
93	10.78.97.112/30	10.78.97.113 – 10.78.97.114	10.78.97.115
94	10.78.97.116/30	10.78.97.117 – 10.78.97.118	10.78.97.119
95	10.78.97.120/30	10.78.97.121 – 10.78.97.122	10.78.97.123
96	10.78.97.124/30	10.78.97.125 – 10.78.97.126	10.78.97.127
97	10.78.97.128/30	10.78.97.129 – 10.78.97.130	10.78.97.131
98	10.78.97.132/30	10.78.97.133 – 10.78.97.134	10.78.97.135
99	10.78.97.136/30	10.78.97.137 – 10.78.97.138	10.78.97.139
100	10.78.97.140/30	10.78.97.141 – 10.78.97.142	10.78.97.143
101	10.78.97.144/30	10.78.97.145 – 10.78.97.146	10.78.97.147
102	10.78.97.148/30	10.78.97.149 – 10.78.97.150	10.78.97.151
103	10.78.97.152/30	10.78.97.153 – 10.78.97.154	10.78.97.155
104	10.78.97.156/30	10.78.97.157 – 10.78.97.158	10.78.97.159
105	10.78.97.160/30	10.78.97.161 – 10.78.97.162	10.78.97.163
106	10.78.97.164/30	10.78.97.165 – 10.78.97.166	10.78.97.167
107	10.78.97.168/30	10.78.97.169 – 10.78.97.170	10.78.97.171
108	10.78.97.172/30	10.78.97.173 – 10.78.97.174	10.78.97.175
109	10.78.97.176/30	10.78.97.177 – 10.78.97.178	10.78.97.179
110	10.78.97.180/30	10.78.97.181 – 10.78.97.182	10.78.97.183
111	10.78.97.184/30	10.78.97.185 – 10.78.97.186	10.78.97.187
112	10.78.97.188/30	10.78.97.189 – 10.78.97.190	10.78.97.191
113	10.78.97.192/30	10.78.97.193 – 10.78.97.194	10.78.97.195
114	10.78.97.196/30	10.78.97.197 – 10.78.97.198	10.78.97.199
115	10.78.97.200/30	10.78.97.201 – 10.78.97.202	10.78.97.203
116	10.78.97.204/30	10.78.97.205 – 10.78.97.206	10.78.97.207
117	10.78.97.208/30	10.78.97.209 – 10.78.97.210	10.78.97.211
118	10.78.97.212/30	10.78.97.213 – 10.78.97.214	10.78.97.215
119	10.78.97.216/30	10.78.97.217 – 10.78.97.218	10.78.97.219
120	10.78.97.220/30	10.78.97.221 – 10.78.97.222	10.78.97.223
121	10.78.97.224/30	10.78.97.225 – 10.78.97.226	10.78.97.227
122	10.78.97.228/30	10.78.97.229 – 10.78.97.230	10.78.97.231
123	10.78.97.232/30	10.78.97.233 – 10.78.97.234	10.78.97.235
124	10.78.97.236/30	10.78.97.237 – 10.78.97.238	10.78.97.239
125	10.78.97.240/30	10.78.97.241 – 10.78.97.242	10.78.97.243
126	10.78.97.244/30	10.78.97.245 – 10.78.97.246	10.78.97.247
127	10.78.97.248/30	10.78.97.249 – 10.78.97.250	10.78.97.251
128	10.78.97.252/30	10.78.97.253 – 10.78.97.254	10.78.97.255
129	10.78.98.0/30	10.78.98.1 – 10.78.98.2	10.78.98.3
130	10.78.98.4/30	10.78.98.5 – 10.78.98.6	10.78.98.7
131	10.78.98.8/30	10.78.98.9 – 10.78.98.10	10.78.98.11
132	10.78.98.12/30	10.78.98.13 – 10.78.98.14	10.78.98.15
133	10.78.98.16/30	10.78.98.17 – 10.78.98.18	10.78.98.19
134	10.78.98.20/30	10.78.98.21 – 10.78.98.22	10.78.98.23
135	10.78.98.24/30	10.78.98.25 – 10.78.98.26	10.78.98.27
136	10.78.98.28/30	10.78.98.29 – 10.78.98.30	10.78.98.31
137	10.78.98.32/30	10.78.98.33 – 10.78.98.34	10.78.98.35
138	10.78.98.36/30	10.78.98.37 – 10.78.98.38	10.78.98.39
139	10.78.98.40/30	10.78.98.41 – 10.78.98.42	10.78.98.43
140	10.78.98.44/30	10.78.98.45 – 10.78.98.46	10.78.98.47
141	10.78.98.48/30	10.78.98.49 – 10.78.98.50	10.78.98.51
142	10.78.98.52/30	10.78.98.53 – 10.78.98.54	10.78.98.55
143	10.78.98.56/30	10.78.98.57 – 10.78.98.58	10.78.98.59
144	10.78.98.60/30	10.78.98.61 – 10.78.98.62	10.78.98.63
145	10.78.98.64/30	10.78.98.65 – 10.78.98.66	10.78.98.67
146	10.78.98.68/30	10.78.98.69 – 10.78.98.70	10.78.98.71
147	10.78.98.72/30	10.78.98.73 – 10.78.98.74	10.78.98.75
148	10.78.98.76/30	10.78.98.77 – 10.78.98.78	10.78.98.79
149	10.78.98.80/30	10.78.98.81 – 10.78.98.82	10.78.98.83
150	10.78.98.84/30	10.78.98.85 – 10.78.98.86	10.78.98.87
151	10.78.98.88/30	10.78.98.89 – 10.78.98.90	10.78.98.91
152	10.78.98.92/30	10.78.98.93 – 10.78.98.94	10.78.98.95
153	10.78.98.96/30	10.78.98.97 – 10.78.98.98	10.78.98.99
154	10.78.98.100/30	10.78.98.101 – 10.78.98.102	10.78.98.103
155	10.78.98.104/30	10.78.98.105 – 10.78.98.106	10.78.98.107
156	10.78.98.108/30	10.78.98.109 – 10.78.98.110	10.78.98.111
157	10.78.98.112/30	10.78.98.113 – 10.78.98.114	10.78.98.115
158	10.78.98.116/30	10.78.98.117 – 10.78.98.118	10.78.98.119
159	10.78.98.120/30	10.78.98.121 – 10.78.98.122	10.78.98.123
160	10.78.98.124/30	10.78.98.125 – 10.78.98.126	10.78.98.127
161	10.78.98.128/30	10.78.98.129 – 10.78.98.130	10.78.98.131
162	10.78.98.132/30	10.78.98.133 – 10.78.98.134	10.78.98.135
163	10.78.98.136/30	10.78.98.137 – 10.78.98.138	10.78.98.139
164	10.78.98.140/30	10.78.98.141 – 10.78.98.142	10.78.98.143
165	10.78.98.144/30	10.78.98.145 – 10.78.98.146	10.78.98.147
166	10.78.98.148/30	10.78.98.149 – 10.78.98.150	10.78.98.151
167	10.78.98.152/30	10.78.98.153 – 10.78.98.154	10.78.98.155
168	10.78.98.156/30	10.78.98.157 – 10.78.98.158	10.78.98.159
169	10.78.98.160/30	10.78.98.161 – 10.78.98.162	10.78.98.163
170	10.78.98.164/30	10.78.98.165 – 10.78.98.166	10.78.98.167
171	10.78.98.168/30	10.78.98.169 – 10.78.98.170	10.78.98.171
172	10.78.98.172/30	10.78.98.173 – 10.78.98.174	10.78.98.175
173	10.78.98.176/30	10.78.98.177 – 10.78.98.178	10.78.98.179
174	10.78.98.180/30	10.78.98.181 – 10.78.98.182	10.78.98.183
175	10.78.98.184/30	10.78.98.185 – 10.78.98.186	10.78.98.187
176	10.78.98.188/30	10.78.98.189 – 10.78.98.190	10.78.98.191
177	10.78.98.192/30	10.78.98.193 – 10.78.98.194	10.78.98.195
178	10.78.98.196/30	10.78.98.197 – 10.78.98.198	10.78.98.199
179	10.78.98.200/30	10.78.98.201 – 10.78.98.202	10.78.98.203
180	10.78.98.204/30	10.78.98.205 – 10.78.98.206	10.78.98.207
181	10.78.98.208/30	10.78.98.209 – 10.78.98.210	10.78.98.211
182	10.78.98.212/30	10.78.98.213 – 10.78.98.214	10.78.98.215
183	10.78.98.216/30	10.78.98.217 – 10.78.98.218	10.78.98.219
184	10.78.98.220/30	10.78.98.221 – 10.78.98.222	10.78.98.223
185	10.78.98.224/30	10.78.98.225 – 10.78.98.226	10.78.98.227
186	10.78.98.228/30	10.78.98.229 – 10.78.98.230	10.78.98.231
187	10.78.98.232/30	10.78.98.233 – 10.78.98.234	10.78.98.235
188	10.78.98.236/30	10.78.98.237 – 10.78.98.238	10.78.98.239
189	10.78.98.240/30	10.78.98.241 – 10.78.98.242	10.78.98.243
190	10.78.98.244/30	10.78.98.245 – 10.78.98.246	10.78.98.247
191	10.78.98.248/30	10.78.98.249 – 10.78.98.250	10.78.98.251
192	10.78.98.252/30	10.78.98.253 – 10.78.98.254	10.78.98.255
193	10.78.99.0/30	10.78.99.1 – 10.78.99.2	10.78.99.3
194	10.78.99.4/30	10.78.99.5 – 10.78.99.6	10.78.99.7
195	10.78.99.8/30	10.78.99.9 – 10.78.99.10	10.78.99.11
196	10.78.99.12/30	10.78.99.13 – 10.78.99.14	10.78.99.15
197	10.78.99.16/30	10.78.99.17 – 10.78.99.18	10.78.99.19
198	10.78.99.20/30	10.78.99.21 – 10.78.99.22	10.78.99.23
199	10.78.99.24/30	10.78.99.25 – 10.78.99.26	10.78.99.27
200	10.78.99.28/30	10.78.99.29 – 10.78.99.30	10.78.99.31
201	10.78.99.32/30	10.78.99.33 – 10.78.99.34	10.78.99.35
202	10.78.99.36/30	10.78.99.37 – 10.78.99.38	10.78.99.39
203	10.78.99.40/30	10.78.99.41 – 10.78.99.42	10.78.99.43
204	10.78.99.44/30	10.78.99.45 – 10.78.99.46	10.78.99.47
205	10.78.99.48/30	10.78.99.49 – 10.78.99.50	10.78.99.51
206	10.78.99.52/30	10.78.99.53 – 10.78.99.54	10.78.99.55
207	10.78.99.56/30	10.78.99.57 – 10.78.99.58	10.78.99.59
208	10.78.99.60/30	10.78.99.61 – 10.78.99.62	10.78.99.63
209	10.78.99.64/30	10.78.99.65 – 10.78.99.66	10.78.99.67
210	10.78.99.68/30	10.78.99.69 – 10.78.99.70	10.78.99.71
211	10.78.99.72/30	10.78.99.73 – 10.78.99.74	10.78.99.75
212	10.78.99.76/30	10.78.99.77 – 10.78.99.78	10.78.99.79
213	10.78.99.80/30	10.78.99.81 – 10.78.99.82	10.78.99.83
214	10.78.99.84/30	10.78.99.85 – 10.78.99.86	10.78.99.87
215	10.78.99.88/30	10.78.99.89 – 10.78.99.90	10.78.99.91
216	10.78.99.92/30	10.78.99.93 – 10.78.99.94	10.78.99.95
217	10.78.99.96/30	10.78.99.97 – 10.78.99.98	10.78.99.99
218	10.78.99.100/30	10.78.99.101 – 10.78.99.102	10.78.99.103
219	10.78.99.104/30	10.78.99.105 – 10.78.99.106	10.78.99.107
220	10.78.99.108/30	10.78.99.109 – 10.78.99.110	10.78.99.111
221	10.78.99.112/30	10.78.99.113 – 10.78.99.114	10.78.99.115
222	10.78.99.116/30	10.78.99.117 – 10.78.99.118	10.78.99.119
223	10.78.99.120/30	10.78.99.121 – 10.78.99.122	10.78.99.123
224	10.78.99.124/30	10.78.99.125 – 10.78.99.126	10.78.99.127
225	10.78.99.128/30	10.78.99.129 – 10.78.99.130	10.78.99.131
226	10.78.99.132/30	10.78.99.133 – 10.78.99.134	10.78.99.135
227	10.78.99.136/30	10.78.99.137 – 10.78.99.138	10.78.99.139
228	10.78.99.140/30	10.78.99.141 – 10.78.99.142	10.78.99.143
229	10.78.99.144/30	10.78.99.145 – 10.78.99.146	10.78.99.147
230	10.78.99.148/30	10.78.99.149 – 10.78.99.150	10.78.99.151
231	10.78.99.152/30	10.78.99.153 – 10.78.99.154	10.78.99.155
232	10.78.99.156/30	10.78.99.157 – 10.78.99.158	10.78.99.159
233	10.78.99.160/30	10.78.99.161 – 10.78.99.162	10.78.99.163
234	10.78.99.164/30	10.78.99.165 – 10.78.99.166	10.78.99.167
235	10.78.99.168/30	10.78.99.169 – 10.78.99.170	10.78.99.171
236	10.78.99.172/30	10.78.99.173 – 10.78.99.174	10.78.99.175
237	10.78.99.176/30	10.78.99.177 – 10.78.99.178	10.78.99.179
238	10.78.99.180/30	10.78.99.181 – 10.78.99.182	10.78.99.183
239	10.78.99.184/30	10.78.99.185 – 10.78.99.186	10.78.99.187
240	10.78.99.188/30	10.78.99.189 – 10.78.99.190	10.78.99.191
241	10.78.99.192/30	10.78.99.193 – 10.78.99.194	10.78.99.195
242	10.78.99.196/30	10.78.99.197 – 10.78.99.198	10.78.99.199
243	10.78.99.200/30	10.78.99.201 – 10.78.99.202	10.78.99.203
244	10.78.99.204/30	10.78.99.205 – 10.78.99.206	10.78.99.207
245	10.78.99.208/30	10.78.99.209 – 10.78.99.210	10.78.99.211
246	10.78.99.212/30	10.78.99.213 – 10.78.99.214	10.78.99.215
247	10.78.99.216/30	10.78.99.217 – 10.78.99.218	10.78.99.219
248	10.78.99.220/30	10.78.99.221 – 10.78.99.222	10.78.99.223
249	10.78.99.224/30	10.78.99.225 – 10.78.99.226	10.78.99.227
250	10.78.99.228/30	10.78.99.229 – 10.78.99.230	10.78.99.231
251	10.78.99.232/30	10.78.99.233 – 10.78.99.234	10.78.99.235
252	10.78.99.236/30	10.78.99.237 – 10.78.99.238	10.78.99.239
253	10.78.99.240/30	10.78.99.241 – 10.78.99.242	10.78.99.243
254	10.78.99.244/30	10.78.99.245 – 10.78.99.246	10.78.99.247
255	10.78.99.248/30	10.78.99.249 – 10.78.99.250	10.78.99.251
256	10.78.99.252/30	10.78.99.253 – 10.78.99.254	10.78.99.255

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 →