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)10.72.232.0/23

network10.72.232.0/23

broadcast10.72.233.255

first host10.72.232.1

last host10.72.233.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.72.232.0/23

address00001010.01001000.11101000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001000.11101000.00000000

broadcast00001010.01001000.11101001.11111111

green = network part, grey = host part

hex0x0a48e800

decimal172550144

reverse dns0.232.72.10.in-addr.arpa

ipv4-mapped::ffff:a48:e800

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.72.232.0/31	10.72.232.0 – 10.72.232.1	10.72.232.1
2	10.72.232.2/31	10.72.232.2 – 10.72.232.3	10.72.232.3
3	10.72.232.4/31	10.72.232.4 – 10.72.232.5	10.72.232.5
4	10.72.232.6/31	10.72.232.6 – 10.72.232.7	10.72.232.7
5	10.72.232.8/31	10.72.232.8 – 10.72.232.9	10.72.232.9
6	10.72.232.10/31	10.72.232.10 – 10.72.232.11	10.72.232.11
7	10.72.232.12/31	10.72.232.12 – 10.72.232.13	10.72.232.13
8	10.72.232.14/31	10.72.232.14 – 10.72.232.15	10.72.232.15
9	10.72.232.16/31	10.72.232.16 – 10.72.232.17	10.72.232.17
10	10.72.232.18/31	10.72.232.18 – 10.72.232.19	10.72.232.19
11	10.72.232.20/31	10.72.232.20 – 10.72.232.21	10.72.232.21
12	10.72.232.22/31	10.72.232.22 – 10.72.232.23	10.72.232.23
13	10.72.232.24/31	10.72.232.24 – 10.72.232.25	10.72.232.25
14	10.72.232.26/31	10.72.232.26 – 10.72.232.27	10.72.232.27
15	10.72.232.28/31	10.72.232.28 – 10.72.232.29	10.72.232.29
16	10.72.232.30/31	10.72.232.30 – 10.72.232.31	10.72.232.31
17	10.72.232.32/31	10.72.232.32 – 10.72.232.33	10.72.232.33
18	10.72.232.34/31	10.72.232.34 – 10.72.232.35	10.72.232.35
19	10.72.232.36/31	10.72.232.36 – 10.72.232.37	10.72.232.37
20	10.72.232.38/31	10.72.232.38 – 10.72.232.39	10.72.232.39
21	10.72.232.40/31	10.72.232.40 – 10.72.232.41	10.72.232.41
22	10.72.232.42/31	10.72.232.42 – 10.72.232.43	10.72.232.43
23	10.72.232.44/31	10.72.232.44 – 10.72.232.45	10.72.232.45
24	10.72.232.46/31	10.72.232.46 – 10.72.232.47	10.72.232.47
25	10.72.232.48/31	10.72.232.48 – 10.72.232.49	10.72.232.49
26	10.72.232.50/31	10.72.232.50 – 10.72.232.51	10.72.232.51
27	10.72.232.52/31	10.72.232.52 – 10.72.232.53	10.72.232.53
28	10.72.232.54/31	10.72.232.54 – 10.72.232.55	10.72.232.55
29	10.72.232.56/31	10.72.232.56 – 10.72.232.57	10.72.232.57
30	10.72.232.58/31	10.72.232.58 – 10.72.232.59	10.72.232.59
31	10.72.232.60/31	10.72.232.60 – 10.72.232.61	10.72.232.61
32	10.72.232.62/31	10.72.232.62 – 10.72.232.63	10.72.232.63
33	10.72.232.64/31	10.72.232.64 – 10.72.232.65	10.72.232.65
34	10.72.232.66/31	10.72.232.66 – 10.72.232.67	10.72.232.67
35	10.72.232.68/31	10.72.232.68 – 10.72.232.69	10.72.232.69
36	10.72.232.70/31	10.72.232.70 – 10.72.232.71	10.72.232.71
37	10.72.232.72/31	10.72.232.72 – 10.72.232.73	10.72.232.73
38	10.72.232.74/31	10.72.232.74 – 10.72.232.75	10.72.232.75
39	10.72.232.76/31	10.72.232.76 – 10.72.232.77	10.72.232.77
40	10.72.232.78/31	10.72.232.78 – 10.72.232.79	10.72.232.79
41	10.72.232.80/31	10.72.232.80 – 10.72.232.81	10.72.232.81
42	10.72.232.82/31	10.72.232.82 – 10.72.232.83	10.72.232.83
43	10.72.232.84/31	10.72.232.84 – 10.72.232.85	10.72.232.85
44	10.72.232.86/31	10.72.232.86 – 10.72.232.87	10.72.232.87
45	10.72.232.88/31	10.72.232.88 – 10.72.232.89	10.72.232.89
46	10.72.232.90/31	10.72.232.90 – 10.72.232.91	10.72.232.91
47	10.72.232.92/31	10.72.232.92 – 10.72.232.93	10.72.232.93
48	10.72.232.94/31	10.72.232.94 – 10.72.232.95	10.72.232.95
49	10.72.232.96/31	10.72.232.96 – 10.72.232.97	10.72.232.97
50	10.72.232.98/31	10.72.232.98 – 10.72.232.99	10.72.232.99
51	10.72.232.100/31	10.72.232.100 – 10.72.232.101	10.72.232.101
52	10.72.232.102/31	10.72.232.102 – 10.72.232.103	10.72.232.103
53	10.72.232.104/31	10.72.232.104 – 10.72.232.105	10.72.232.105
54	10.72.232.106/31	10.72.232.106 – 10.72.232.107	10.72.232.107
55	10.72.232.108/31	10.72.232.108 – 10.72.232.109	10.72.232.109
56	10.72.232.110/31	10.72.232.110 – 10.72.232.111	10.72.232.111
57	10.72.232.112/31	10.72.232.112 – 10.72.232.113	10.72.232.113
58	10.72.232.114/31	10.72.232.114 – 10.72.232.115	10.72.232.115
59	10.72.232.116/31	10.72.232.116 – 10.72.232.117	10.72.232.117
60	10.72.232.118/31	10.72.232.118 – 10.72.232.119	10.72.232.119
61	10.72.232.120/31	10.72.232.120 – 10.72.232.121	10.72.232.121
62	10.72.232.122/31	10.72.232.122 – 10.72.232.123	10.72.232.123
63	10.72.232.124/31	10.72.232.124 – 10.72.232.125	10.72.232.125
64	10.72.232.126/31	10.72.232.126 – 10.72.232.127	10.72.232.127
65	10.72.232.128/31	10.72.232.128 – 10.72.232.129	10.72.232.129
66	10.72.232.130/31	10.72.232.130 – 10.72.232.131	10.72.232.131
67	10.72.232.132/31	10.72.232.132 – 10.72.232.133	10.72.232.133
68	10.72.232.134/31	10.72.232.134 – 10.72.232.135	10.72.232.135
69	10.72.232.136/31	10.72.232.136 – 10.72.232.137	10.72.232.137
70	10.72.232.138/31	10.72.232.138 – 10.72.232.139	10.72.232.139
71	10.72.232.140/31	10.72.232.140 – 10.72.232.141	10.72.232.141
72	10.72.232.142/31	10.72.232.142 – 10.72.232.143	10.72.232.143
73	10.72.232.144/31	10.72.232.144 – 10.72.232.145	10.72.232.145
74	10.72.232.146/31	10.72.232.146 – 10.72.232.147	10.72.232.147
75	10.72.232.148/31	10.72.232.148 – 10.72.232.149	10.72.232.149
76	10.72.232.150/31	10.72.232.150 – 10.72.232.151	10.72.232.151
77	10.72.232.152/31	10.72.232.152 – 10.72.232.153	10.72.232.153
78	10.72.232.154/31	10.72.232.154 – 10.72.232.155	10.72.232.155
79	10.72.232.156/31	10.72.232.156 – 10.72.232.157	10.72.232.157
80	10.72.232.158/31	10.72.232.158 – 10.72.232.159	10.72.232.159
81	10.72.232.160/31	10.72.232.160 – 10.72.232.161	10.72.232.161
82	10.72.232.162/31	10.72.232.162 – 10.72.232.163	10.72.232.163
83	10.72.232.164/31	10.72.232.164 – 10.72.232.165	10.72.232.165
84	10.72.232.166/31	10.72.232.166 – 10.72.232.167	10.72.232.167
85	10.72.232.168/31	10.72.232.168 – 10.72.232.169	10.72.232.169
86	10.72.232.170/31	10.72.232.170 – 10.72.232.171	10.72.232.171
87	10.72.232.172/31	10.72.232.172 – 10.72.232.173	10.72.232.173
88	10.72.232.174/31	10.72.232.174 – 10.72.232.175	10.72.232.175
89	10.72.232.176/31	10.72.232.176 – 10.72.232.177	10.72.232.177
90	10.72.232.178/31	10.72.232.178 – 10.72.232.179	10.72.232.179
91	10.72.232.180/31	10.72.232.180 – 10.72.232.181	10.72.232.181
92	10.72.232.182/31	10.72.232.182 – 10.72.232.183	10.72.232.183
93	10.72.232.184/31	10.72.232.184 – 10.72.232.185	10.72.232.185
94	10.72.232.186/31	10.72.232.186 – 10.72.232.187	10.72.232.187
95	10.72.232.188/31	10.72.232.188 – 10.72.232.189	10.72.232.189
96	10.72.232.190/31	10.72.232.190 – 10.72.232.191	10.72.232.191
97	10.72.232.192/31	10.72.232.192 – 10.72.232.193	10.72.232.193
98	10.72.232.194/31	10.72.232.194 – 10.72.232.195	10.72.232.195
99	10.72.232.196/31	10.72.232.196 – 10.72.232.197	10.72.232.197
100	10.72.232.198/31	10.72.232.198 – 10.72.232.199	10.72.232.199
101	10.72.232.200/31	10.72.232.200 – 10.72.232.201	10.72.232.201
102	10.72.232.202/31	10.72.232.202 – 10.72.232.203	10.72.232.203
103	10.72.232.204/31	10.72.232.204 – 10.72.232.205	10.72.232.205
104	10.72.232.206/31	10.72.232.206 – 10.72.232.207	10.72.232.207
105	10.72.232.208/31	10.72.232.208 – 10.72.232.209	10.72.232.209
106	10.72.232.210/31	10.72.232.210 – 10.72.232.211	10.72.232.211
107	10.72.232.212/31	10.72.232.212 – 10.72.232.213	10.72.232.213
108	10.72.232.214/31	10.72.232.214 – 10.72.232.215	10.72.232.215
109	10.72.232.216/31	10.72.232.216 – 10.72.232.217	10.72.232.217
110	10.72.232.218/31	10.72.232.218 – 10.72.232.219	10.72.232.219
111	10.72.232.220/31	10.72.232.220 – 10.72.232.221	10.72.232.221
112	10.72.232.222/31	10.72.232.222 – 10.72.232.223	10.72.232.223
113	10.72.232.224/31	10.72.232.224 – 10.72.232.225	10.72.232.225
114	10.72.232.226/31	10.72.232.226 – 10.72.232.227	10.72.232.227
115	10.72.232.228/31	10.72.232.228 – 10.72.232.229	10.72.232.229
116	10.72.232.230/31	10.72.232.230 – 10.72.232.231	10.72.232.231
117	10.72.232.232/31	10.72.232.232 – 10.72.232.233	10.72.232.233
118	10.72.232.234/31	10.72.232.234 – 10.72.232.235	10.72.232.235
119	10.72.232.236/31	10.72.232.236 – 10.72.232.237	10.72.232.237
120	10.72.232.238/31	10.72.232.238 – 10.72.232.239	10.72.232.239
121	10.72.232.240/31	10.72.232.240 – 10.72.232.241	10.72.232.241
122	10.72.232.242/31	10.72.232.242 – 10.72.232.243	10.72.232.243
123	10.72.232.244/31	10.72.232.244 – 10.72.232.245	10.72.232.245
124	10.72.232.246/31	10.72.232.246 – 10.72.232.247	10.72.232.247
125	10.72.232.248/31	10.72.232.248 – 10.72.232.249	10.72.232.249
126	10.72.232.250/31	10.72.232.250 – 10.72.232.251	10.72.232.251
127	10.72.232.252/31	10.72.232.252 – 10.72.232.253	10.72.232.253
128	10.72.232.254/31	10.72.232.254 – 10.72.232.255	10.72.232.255
129	10.72.233.0/31	10.72.233.0 – 10.72.233.1	10.72.233.1
130	10.72.233.2/31	10.72.233.2 – 10.72.233.3	10.72.233.3
131	10.72.233.4/31	10.72.233.4 – 10.72.233.5	10.72.233.5
132	10.72.233.6/31	10.72.233.6 – 10.72.233.7	10.72.233.7
133	10.72.233.8/31	10.72.233.8 – 10.72.233.9	10.72.233.9
134	10.72.233.10/31	10.72.233.10 – 10.72.233.11	10.72.233.11
135	10.72.233.12/31	10.72.233.12 – 10.72.233.13	10.72.233.13
136	10.72.233.14/31	10.72.233.14 – 10.72.233.15	10.72.233.15
137	10.72.233.16/31	10.72.233.16 – 10.72.233.17	10.72.233.17
138	10.72.233.18/31	10.72.233.18 – 10.72.233.19	10.72.233.19
139	10.72.233.20/31	10.72.233.20 – 10.72.233.21	10.72.233.21
140	10.72.233.22/31	10.72.233.22 – 10.72.233.23	10.72.233.23
141	10.72.233.24/31	10.72.233.24 – 10.72.233.25	10.72.233.25
142	10.72.233.26/31	10.72.233.26 – 10.72.233.27	10.72.233.27
143	10.72.233.28/31	10.72.233.28 – 10.72.233.29	10.72.233.29
144	10.72.233.30/31	10.72.233.30 – 10.72.233.31	10.72.233.31
145	10.72.233.32/31	10.72.233.32 – 10.72.233.33	10.72.233.33
146	10.72.233.34/31	10.72.233.34 – 10.72.233.35	10.72.233.35
147	10.72.233.36/31	10.72.233.36 – 10.72.233.37	10.72.233.37
148	10.72.233.38/31	10.72.233.38 – 10.72.233.39	10.72.233.39
149	10.72.233.40/31	10.72.233.40 – 10.72.233.41	10.72.233.41
150	10.72.233.42/31	10.72.233.42 – 10.72.233.43	10.72.233.43
151	10.72.233.44/31	10.72.233.44 – 10.72.233.45	10.72.233.45
152	10.72.233.46/31	10.72.233.46 – 10.72.233.47	10.72.233.47
153	10.72.233.48/31	10.72.233.48 – 10.72.233.49	10.72.233.49
154	10.72.233.50/31	10.72.233.50 – 10.72.233.51	10.72.233.51
155	10.72.233.52/31	10.72.233.52 – 10.72.233.53	10.72.233.53
156	10.72.233.54/31	10.72.233.54 – 10.72.233.55	10.72.233.55
157	10.72.233.56/31	10.72.233.56 – 10.72.233.57	10.72.233.57
158	10.72.233.58/31	10.72.233.58 – 10.72.233.59	10.72.233.59
159	10.72.233.60/31	10.72.233.60 – 10.72.233.61	10.72.233.61
160	10.72.233.62/31	10.72.233.62 – 10.72.233.63	10.72.233.63
161	10.72.233.64/31	10.72.233.64 – 10.72.233.65	10.72.233.65
162	10.72.233.66/31	10.72.233.66 – 10.72.233.67	10.72.233.67
163	10.72.233.68/31	10.72.233.68 – 10.72.233.69	10.72.233.69
164	10.72.233.70/31	10.72.233.70 – 10.72.233.71	10.72.233.71
165	10.72.233.72/31	10.72.233.72 – 10.72.233.73	10.72.233.73
166	10.72.233.74/31	10.72.233.74 – 10.72.233.75	10.72.233.75
167	10.72.233.76/31	10.72.233.76 – 10.72.233.77	10.72.233.77
168	10.72.233.78/31	10.72.233.78 – 10.72.233.79	10.72.233.79
169	10.72.233.80/31	10.72.233.80 – 10.72.233.81	10.72.233.81
170	10.72.233.82/31	10.72.233.82 – 10.72.233.83	10.72.233.83
171	10.72.233.84/31	10.72.233.84 – 10.72.233.85	10.72.233.85
172	10.72.233.86/31	10.72.233.86 – 10.72.233.87	10.72.233.87
173	10.72.233.88/31	10.72.233.88 – 10.72.233.89	10.72.233.89
174	10.72.233.90/31	10.72.233.90 – 10.72.233.91	10.72.233.91
175	10.72.233.92/31	10.72.233.92 – 10.72.233.93	10.72.233.93
176	10.72.233.94/31	10.72.233.94 – 10.72.233.95	10.72.233.95
177	10.72.233.96/31	10.72.233.96 – 10.72.233.97	10.72.233.97
178	10.72.233.98/31	10.72.233.98 – 10.72.233.99	10.72.233.99
179	10.72.233.100/31	10.72.233.100 – 10.72.233.101	10.72.233.101
180	10.72.233.102/31	10.72.233.102 – 10.72.233.103	10.72.233.103
181	10.72.233.104/31	10.72.233.104 – 10.72.233.105	10.72.233.105
182	10.72.233.106/31	10.72.233.106 – 10.72.233.107	10.72.233.107
183	10.72.233.108/31	10.72.233.108 – 10.72.233.109	10.72.233.109
184	10.72.233.110/31	10.72.233.110 – 10.72.233.111	10.72.233.111
185	10.72.233.112/31	10.72.233.112 – 10.72.233.113	10.72.233.113
186	10.72.233.114/31	10.72.233.114 – 10.72.233.115	10.72.233.115
187	10.72.233.116/31	10.72.233.116 – 10.72.233.117	10.72.233.117
188	10.72.233.118/31	10.72.233.118 – 10.72.233.119	10.72.233.119
189	10.72.233.120/31	10.72.233.120 – 10.72.233.121	10.72.233.121
190	10.72.233.122/31	10.72.233.122 – 10.72.233.123	10.72.233.123
191	10.72.233.124/31	10.72.233.124 – 10.72.233.125	10.72.233.125
192	10.72.233.126/31	10.72.233.126 – 10.72.233.127	10.72.233.127
193	10.72.233.128/31	10.72.233.128 – 10.72.233.129	10.72.233.129
194	10.72.233.130/31	10.72.233.130 – 10.72.233.131	10.72.233.131
195	10.72.233.132/31	10.72.233.132 – 10.72.233.133	10.72.233.133
196	10.72.233.134/31	10.72.233.134 – 10.72.233.135	10.72.233.135
197	10.72.233.136/31	10.72.233.136 – 10.72.233.137	10.72.233.137
198	10.72.233.138/31	10.72.233.138 – 10.72.233.139	10.72.233.139
199	10.72.233.140/31	10.72.233.140 – 10.72.233.141	10.72.233.141
200	10.72.233.142/31	10.72.233.142 – 10.72.233.143	10.72.233.143
201	10.72.233.144/31	10.72.233.144 – 10.72.233.145	10.72.233.145
202	10.72.233.146/31	10.72.233.146 – 10.72.233.147	10.72.233.147
203	10.72.233.148/31	10.72.233.148 – 10.72.233.149	10.72.233.149
204	10.72.233.150/31	10.72.233.150 – 10.72.233.151	10.72.233.151
205	10.72.233.152/31	10.72.233.152 – 10.72.233.153	10.72.233.153
206	10.72.233.154/31	10.72.233.154 – 10.72.233.155	10.72.233.155
207	10.72.233.156/31	10.72.233.156 – 10.72.233.157	10.72.233.157
208	10.72.233.158/31	10.72.233.158 – 10.72.233.159	10.72.233.159
209	10.72.233.160/31	10.72.233.160 – 10.72.233.161	10.72.233.161
210	10.72.233.162/31	10.72.233.162 – 10.72.233.163	10.72.233.163
211	10.72.233.164/31	10.72.233.164 – 10.72.233.165	10.72.233.165
212	10.72.233.166/31	10.72.233.166 – 10.72.233.167	10.72.233.167
213	10.72.233.168/31	10.72.233.168 – 10.72.233.169	10.72.233.169
214	10.72.233.170/31	10.72.233.170 – 10.72.233.171	10.72.233.171
215	10.72.233.172/31	10.72.233.172 – 10.72.233.173	10.72.233.173
216	10.72.233.174/31	10.72.233.174 – 10.72.233.175	10.72.233.175
217	10.72.233.176/31	10.72.233.176 – 10.72.233.177	10.72.233.177
218	10.72.233.178/31	10.72.233.178 – 10.72.233.179	10.72.233.179
219	10.72.233.180/31	10.72.233.180 – 10.72.233.181	10.72.233.181
220	10.72.233.182/31	10.72.233.182 – 10.72.233.183	10.72.233.183
221	10.72.233.184/31	10.72.233.184 – 10.72.233.185	10.72.233.185
222	10.72.233.186/31	10.72.233.186 – 10.72.233.187	10.72.233.187
223	10.72.233.188/31	10.72.233.188 – 10.72.233.189	10.72.233.189
224	10.72.233.190/31	10.72.233.190 – 10.72.233.191	10.72.233.191
225	10.72.233.192/31	10.72.233.192 – 10.72.233.193	10.72.233.193
226	10.72.233.194/31	10.72.233.194 – 10.72.233.195	10.72.233.195
227	10.72.233.196/31	10.72.233.196 – 10.72.233.197	10.72.233.197
228	10.72.233.198/31	10.72.233.198 – 10.72.233.199	10.72.233.199
229	10.72.233.200/31	10.72.233.200 – 10.72.233.201	10.72.233.201
230	10.72.233.202/31	10.72.233.202 – 10.72.233.203	10.72.233.203
231	10.72.233.204/31	10.72.233.204 – 10.72.233.205	10.72.233.205
232	10.72.233.206/31	10.72.233.206 – 10.72.233.207	10.72.233.207
233	10.72.233.208/31	10.72.233.208 – 10.72.233.209	10.72.233.209
234	10.72.233.210/31	10.72.233.210 – 10.72.233.211	10.72.233.211
235	10.72.233.212/31	10.72.233.212 – 10.72.233.213	10.72.233.213
236	10.72.233.214/31	10.72.233.214 – 10.72.233.215	10.72.233.215
237	10.72.233.216/31	10.72.233.216 – 10.72.233.217	10.72.233.217
238	10.72.233.218/31	10.72.233.218 – 10.72.233.219	10.72.233.219
239	10.72.233.220/31	10.72.233.220 – 10.72.233.221	10.72.233.221
240	10.72.233.222/31	10.72.233.222 – 10.72.233.223	10.72.233.223
241	10.72.233.224/31	10.72.233.224 – 10.72.233.225	10.72.233.225
242	10.72.233.226/31	10.72.233.226 – 10.72.233.227	10.72.233.227
243	10.72.233.228/31	10.72.233.228 – 10.72.233.229	10.72.233.229
244	10.72.233.230/31	10.72.233.230 – 10.72.233.231	10.72.233.231
245	10.72.233.232/31	10.72.233.232 – 10.72.233.233	10.72.233.233
246	10.72.233.234/31	10.72.233.234 – 10.72.233.235	10.72.233.235
247	10.72.233.236/31	10.72.233.236 – 10.72.233.237	10.72.233.237
248	10.72.233.238/31	10.72.233.238 – 10.72.233.239	10.72.233.239
249	10.72.233.240/31	10.72.233.240 – 10.72.233.241	10.72.233.241
250	10.72.233.242/31	10.72.233.242 – 10.72.233.243	10.72.233.243
251	10.72.233.244/31	10.72.233.244 – 10.72.233.245	10.72.233.245
252	10.72.233.246/31	10.72.233.246 – 10.72.233.247	10.72.233.247
253	10.72.233.248/31	10.72.233.248 – 10.72.233.249	10.72.233.249
254	10.72.233.250/31	10.72.233.250 – 10.72.233.251	10.72.233.251
255	10.72.233.252/31	10.72.233.252 – 10.72.233.253	10.72.233.253
256	10.72.233.254/31	10.72.233.254 – 10.72.233.255	10.72.233.255

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 /23
/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	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →