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)10.0.50.0/23

network10.0.50.0/23

broadcast10.0.51.255

first host10.0.50.1

last host10.0.51.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.50.0/23

address00001010.00000000.00110010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.00110010.00000000

broadcast00001010.00000000.00110011.11111111

green = network part, grey = host part

hex0x0a003200

decimal167784960

reverse dns0.50.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:3200

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.50.0/31	10.0.50.0 – 10.0.50.1	10.0.50.1
2	10.0.50.2/31	10.0.50.2 – 10.0.50.3	10.0.50.3
3	10.0.50.4/31	10.0.50.4 – 10.0.50.5	10.0.50.5
4	10.0.50.6/31	10.0.50.6 – 10.0.50.7	10.0.50.7
5	10.0.50.8/31	10.0.50.8 – 10.0.50.9	10.0.50.9
6	10.0.50.10/31	10.0.50.10 – 10.0.50.11	10.0.50.11
7	10.0.50.12/31	10.0.50.12 – 10.0.50.13	10.0.50.13
8	10.0.50.14/31	10.0.50.14 – 10.0.50.15	10.0.50.15
9	10.0.50.16/31	10.0.50.16 – 10.0.50.17	10.0.50.17
10	10.0.50.18/31	10.0.50.18 – 10.0.50.19	10.0.50.19
11	10.0.50.20/31	10.0.50.20 – 10.0.50.21	10.0.50.21
12	10.0.50.22/31	10.0.50.22 – 10.0.50.23	10.0.50.23
13	10.0.50.24/31	10.0.50.24 – 10.0.50.25	10.0.50.25
14	10.0.50.26/31	10.0.50.26 – 10.0.50.27	10.0.50.27
15	10.0.50.28/31	10.0.50.28 – 10.0.50.29	10.0.50.29
16	10.0.50.30/31	10.0.50.30 – 10.0.50.31	10.0.50.31
17	10.0.50.32/31	10.0.50.32 – 10.0.50.33	10.0.50.33
18	10.0.50.34/31	10.0.50.34 – 10.0.50.35	10.0.50.35
19	10.0.50.36/31	10.0.50.36 – 10.0.50.37	10.0.50.37
20	10.0.50.38/31	10.0.50.38 – 10.0.50.39	10.0.50.39
21	10.0.50.40/31	10.0.50.40 – 10.0.50.41	10.0.50.41
22	10.0.50.42/31	10.0.50.42 – 10.0.50.43	10.0.50.43
23	10.0.50.44/31	10.0.50.44 – 10.0.50.45	10.0.50.45
24	10.0.50.46/31	10.0.50.46 – 10.0.50.47	10.0.50.47
25	10.0.50.48/31	10.0.50.48 – 10.0.50.49	10.0.50.49
26	10.0.50.50/31	10.0.50.50 – 10.0.50.51	10.0.50.51
27	10.0.50.52/31	10.0.50.52 – 10.0.50.53	10.0.50.53
28	10.0.50.54/31	10.0.50.54 – 10.0.50.55	10.0.50.55
29	10.0.50.56/31	10.0.50.56 – 10.0.50.57	10.0.50.57
30	10.0.50.58/31	10.0.50.58 – 10.0.50.59	10.0.50.59
31	10.0.50.60/31	10.0.50.60 – 10.0.50.61	10.0.50.61
32	10.0.50.62/31	10.0.50.62 – 10.0.50.63	10.0.50.63
33	10.0.50.64/31	10.0.50.64 – 10.0.50.65	10.0.50.65
34	10.0.50.66/31	10.0.50.66 – 10.0.50.67	10.0.50.67
35	10.0.50.68/31	10.0.50.68 – 10.0.50.69	10.0.50.69
36	10.0.50.70/31	10.0.50.70 – 10.0.50.71	10.0.50.71
37	10.0.50.72/31	10.0.50.72 – 10.0.50.73	10.0.50.73
38	10.0.50.74/31	10.0.50.74 – 10.0.50.75	10.0.50.75
39	10.0.50.76/31	10.0.50.76 – 10.0.50.77	10.0.50.77
40	10.0.50.78/31	10.0.50.78 – 10.0.50.79	10.0.50.79
41	10.0.50.80/31	10.0.50.80 – 10.0.50.81	10.0.50.81
42	10.0.50.82/31	10.0.50.82 – 10.0.50.83	10.0.50.83
43	10.0.50.84/31	10.0.50.84 – 10.0.50.85	10.0.50.85
44	10.0.50.86/31	10.0.50.86 – 10.0.50.87	10.0.50.87
45	10.0.50.88/31	10.0.50.88 – 10.0.50.89	10.0.50.89
46	10.0.50.90/31	10.0.50.90 – 10.0.50.91	10.0.50.91
47	10.0.50.92/31	10.0.50.92 – 10.0.50.93	10.0.50.93
48	10.0.50.94/31	10.0.50.94 – 10.0.50.95	10.0.50.95
49	10.0.50.96/31	10.0.50.96 – 10.0.50.97	10.0.50.97
50	10.0.50.98/31	10.0.50.98 – 10.0.50.99	10.0.50.99
51	10.0.50.100/31	10.0.50.100 – 10.0.50.101	10.0.50.101
52	10.0.50.102/31	10.0.50.102 – 10.0.50.103	10.0.50.103
53	10.0.50.104/31	10.0.50.104 – 10.0.50.105	10.0.50.105
54	10.0.50.106/31	10.0.50.106 – 10.0.50.107	10.0.50.107
55	10.0.50.108/31	10.0.50.108 – 10.0.50.109	10.0.50.109
56	10.0.50.110/31	10.0.50.110 – 10.0.50.111	10.0.50.111
57	10.0.50.112/31	10.0.50.112 – 10.0.50.113	10.0.50.113
58	10.0.50.114/31	10.0.50.114 – 10.0.50.115	10.0.50.115
59	10.0.50.116/31	10.0.50.116 – 10.0.50.117	10.0.50.117
60	10.0.50.118/31	10.0.50.118 – 10.0.50.119	10.0.50.119
61	10.0.50.120/31	10.0.50.120 – 10.0.50.121	10.0.50.121
62	10.0.50.122/31	10.0.50.122 – 10.0.50.123	10.0.50.123
63	10.0.50.124/31	10.0.50.124 – 10.0.50.125	10.0.50.125
64	10.0.50.126/31	10.0.50.126 – 10.0.50.127	10.0.50.127
65	10.0.50.128/31	10.0.50.128 – 10.0.50.129	10.0.50.129
66	10.0.50.130/31	10.0.50.130 – 10.0.50.131	10.0.50.131
67	10.0.50.132/31	10.0.50.132 – 10.0.50.133	10.0.50.133
68	10.0.50.134/31	10.0.50.134 – 10.0.50.135	10.0.50.135
69	10.0.50.136/31	10.0.50.136 – 10.0.50.137	10.0.50.137
70	10.0.50.138/31	10.0.50.138 – 10.0.50.139	10.0.50.139
71	10.0.50.140/31	10.0.50.140 – 10.0.50.141	10.0.50.141
72	10.0.50.142/31	10.0.50.142 – 10.0.50.143	10.0.50.143
73	10.0.50.144/31	10.0.50.144 – 10.0.50.145	10.0.50.145
74	10.0.50.146/31	10.0.50.146 – 10.0.50.147	10.0.50.147
75	10.0.50.148/31	10.0.50.148 – 10.0.50.149	10.0.50.149
76	10.0.50.150/31	10.0.50.150 – 10.0.50.151	10.0.50.151
77	10.0.50.152/31	10.0.50.152 – 10.0.50.153	10.0.50.153
78	10.0.50.154/31	10.0.50.154 – 10.0.50.155	10.0.50.155
79	10.0.50.156/31	10.0.50.156 – 10.0.50.157	10.0.50.157
80	10.0.50.158/31	10.0.50.158 – 10.0.50.159	10.0.50.159
81	10.0.50.160/31	10.0.50.160 – 10.0.50.161	10.0.50.161
82	10.0.50.162/31	10.0.50.162 – 10.0.50.163	10.0.50.163
83	10.0.50.164/31	10.0.50.164 – 10.0.50.165	10.0.50.165
84	10.0.50.166/31	10.0.50.166 – 10.0.50.167	10.0.50.167
85	10.0.50.168/31	10.0.50.168 – 10.0.50.169	10.0.50.169
86	10.0.50.170/31	10.0.50.170 – 10.0.50.171	10.0.50.171
87	10.0.50.172/31	10.0.50.172 – 10.0.50.173	10.0.50.173
88	10.0.50.174/31	10.0.50.174 – 10.0.50.175	10.0.50.175
89	10.0.50.176/31	10.0.50.176 – 10.0.50.177	10.0.50.177
90	10.0.50.178/31	10.0.50.178 – 10.0.50.179	10.0.50.179
91	10.0.50.180/31	10.0.50.180 – 10.0.50.181	10.0.50.181
92	10.0.50.182/31	10.0.50.182 – 10.0.50.183	10.0.50.183
93	10.0.50.184/31	10.0.50.184 – 10.0.50.185	10.0.50.185
94	10.0.50.186/31	10.0.50.186 – 10.0.50.187	10.0.50.187
95	10.0.50.188/31	10.0.50.188 – 10.0.50.189	10.0.50.189
96	10.0.50.190/31	10.0.50.190 – 10.0.50.191	10.0.50.191
97	10.0.50.192/31	10.0.50.192 – 10.0.50.193	10.0.50.193
98	10.0.50.194/31	10.0.50.194 – 10.0.50.195	10.0.50.195
99	10.0.50.196/31	10.0.50.196 – 10.0.50.197	10.0.50.197
100	10.0.50.198/31	10.0.50.198 – 10.0.50.199	10.0.50.199
101	10.0.50.200/31	10.0.50.200 – 10.0.50.201	10.0.50.201
102	10.0.50.202/31	10.0.50.202 – 10.0.50.203	10.0.50.203
103	10.0.50.204/31	10.0.50.204 – 10.0.50.205	10.0.50.205
104	10.0.50.206/31	10.0.50.206 – 10.0.50.207	10.0.50.207
105	10.0.50.208/31	10.0.50.208 – 10.0.50.209	10.0.50.209
106	10.0.50.210/31	10.0.50.210 – 10.0.50.211	10.0.50.211
107	10.0.50.212/31	10.0.50.212 – 10.0.50.213	10.0.50.213
108	10.0.50.214/31	10.0.50.214 – 10.0.50.215	10.0.50.215
109	10.0.50.216/31	10.0.50.216 – 10.0.50.217	10.0.50.217
110	10.0.50.218/31	10.0.50.218 – 10.0.50.219	10.0.50.219
111	10.0.50.220/31	10.0.50.220 – 10.0.50.221	10.0.50.221
112	10.0.50.222/31	10.0.50.222 – 10.0.50.223	10.0.50.223
113	10.0.50.224/31	10.0.50.224 – 10.0.50.225	10.0.50.225
114	10.0.50.226/31	10.0.50.226 – 10.0.50.227	10.0.50.227
115	10.0.50.228/31	10.0.50.228 – 10.0.50.229	10.0.50.229
116	10.0.50.230/31	10.0.50.230 – 10.0.50.231	10.0.50.231
117	10.0.50.232/31	10.0.50.232 – 10.0.50.233	10.0.50.233
118	10.0.50.234/31	10.0.50.234 – 10.0.50.235	10.0.50.235
119	10.0.50.236/31	10.0.50.236 – 10.0.50.237	10.0.50.237
120	10.0.50.238/31	10.0.50.238 – 10.0.50.239	10.0.50.239
121	10.0.50.240/31	10.0.50.240 – 10.0.50.241	10.0.50.241
122	10.0.50.242/31	10.0.50.242 – 10.0.50.243	10.0.50.243
123	10.0.50.244/31	10.0.50.244 – 10.0.50.245	10.0.50.245
124	10.0.50.246/31	10.0.50.246 – 10.0.50.247	10.0.50.247
125	10.0.50.248/31	10.0.50.248 – 10.0.50.249	10.0.50.249
126	10.0.50.250/31	10.0.50.250 – 10.0.50.251	10.0.50.251
127	10.0.50.252/31	10.0.50.252 – 10.0.50.253	10.0.50.253
128	10.0.50.254/31	10.0.50.254 – 10.0.50.255	10.0.50.255
129	10.0.51.0/31	10.0.51.0 – 10.0.51.1	10.0.51.1
130	10.0.51.2/31	10.0.51.2 – 10.0.51.3	10.0.51.3
131	10.0.51.4/31	10.0.51.4 – 10.0.51.5	10.0.51.5
132	10.0.51.6/31	10.0.51.6 – 10.0.51.7	10.0.51.7
133	10.0.51.8/31	10.0.51.8 – 10.0.51.9	10.0.51.9
134	10.0.51.10/31	10.0.51.10 – 10.0.51.11	10.0.51.11
135	10.0.51.12/31	10.0.51.12 – 10.0.51.13	10.0.51.13
136	10.0.51.14/31	10.0.51.14 – 10.0.51.15	10.0.51.15
137	10.0.51.16/31	10.0.51.16 – 10.0.51.17	10.0.51.17
138	10.0.51.18/31	10.0.51.18 – 10.0.51.19	10.0.51.19
139	10.0.51.20/31	10.0.51.20 – 10.0.51.21	10.0.51.21
140	10.0.51.22/31	10.0.51.22 – 10.0.51.23	10.0.51.23
141	10.0.51.24/31	10.0.51.24 – 10.0.51.25	10.0.51.25
142	10.0.51.26/31	10.0.51.26 – 10.0.51.27	10.0.51.27
143	10.0.51.28/31	10.0.51.28 – 10.0.51.29	10.0.51.29
144	10.0.51.30/31	10.0.51.30 – 10.0.51.31	10.0.51.31
145	10.0.51.32/31	10.0.51.32 – 10.0.51.33	10.0.51.33
146	10.0.51.34/31	10.0.51.34 – 10.0.51.35	10.0.51.35
147	10.0.51.36/31	10.0.51.36 – 10.0.51.37	10.0.51.37
148	10.0.51.38/31	10.0.51.38 – 10.0.51.39	10.0.51.39
149	10.0.51.40/31	10.0.51.40 – 10.0.51.41	10.0.51.41
150	10.0.51.42/31	10.0.51.42 – 10.0.51.43	10.0.51.43
151	10.0.51.44/31	10.0.51.44 – 10.0.51.45	10.0.51.45
152	10.0.51.46/31	10.0.51.46 – 10.0.51.47	10.0.51.47
153	10.0.51.48/31	10.0.51.48 – 10.0.51.49	10.0.51.49
154	10.0.51.50/31	10.0.51.50 – 10.0.51.51	10.0.51.51
155	10.0.51.52/31	10.0.51.52 – 10.0.51.53	10.0.51.53
156	10.0.51.54/31	10.0.51.54 – 10.0.51.55	10.0.51.55
157	10.0.51.56/31	10.0.51.56 – 10.0.51.57	10.0.51.57
158	10.0.51.58/31	10.0.51.58 – 10.0.51.59	10.0.51.59
159	10.0.51.60/31	10.0.51.60 – 10.0.51.61	10.0.51.61
160	10.0.51.62/31	10.0.51.62 – 10.0.51.63	10.0.51.63
161	10.0.51.64/31	10.0.51.64 – 10.0.51.65	10.0.51.65
162	10.0.51.66/31	10.0.51.66 – 10.0.51.67	10.0.51.67
163	10.0.51.68/31	10.0.51.68 – 10.0.51.69	10.0.51.69
164	10.0.51.70/31	10.0.51.70 – 10.0.51.71	10.0.51.71
165	10.0.51.72/31	10.0.51.72 – 10.0.51.73	10.0.51.73
166	10.0.51.74/31	10.0.51.74 – 10.0.51.75	10.0.51.75
167	10.0.51.76/31	10.0.51.76 – 10.0.51.77	10.0.51.77
168	10.0.51.78/31	10.0.51.78 – 10.0.51.79	10.0.51.79
169	10.0.51.80/31	10.0.51.80 – 10.0.51.81	10.0.51.81
170	10.0.51.82/31	10.0.51.82 – 10.0.51.83	10.0.51.83
171	10.0.51.84/31	10.0.51.84 – 10.0.51.85	10.0.51.85
172	10.0.51.86/31	10.0.51.86 – 10.0.51.87	10.0.51.87
173	10.0.51.88/31	10.0.51.88 – 10.0.51.89	10.0.51.89
174	10.0.51.90/31	10.0.51.90 – 10.0.51.91	10.0.51.91
175	10.0.51.92/31	10.0.51.92 – 10.0.51.93	10.0.51.93
176	10.0.51.94/31	10.0.51.94 – 10.0.51.95	10.0.51.95
177	10.0.51.96/31	10.0.51.96 – 10.0.51.97	10.0.51.97
178	10.0.51.98/31	10.0.51.98 – 10.0.51.99	10.0.51.99
179	10.0.51.100/31	10.0.51.100 – 10.0.51.101	10.0.51.101
180	10.0.51.102/31	10.0.51.102 – 10.0.51.103	10.0.51.103
181	10.0.51.104/31	10.0.51.104 – 10.0.51.105	10.0.51.105
182	10.0.51.106/31	10.0.51.106 – 10.0.51.107	10.0.51.107
183	10.0.51.108/31	10.0.51.108 – 10.0.51.109	10.0.51.109
184	10.0.51.110/31	10.0.51.110 – 10.0.51.111	10.0.51.111
185	10.0.51.112/31	10.0.51.112 – 10.0.51.113	10.0.51.113
186	10.0.51.114/31	10.0.51.114 – 10.0.51.115	10.0.51.115
187	10.0.51.116/31	10.0.51.116 – 10.0.51.117	10.0.51.117
188	10.0.51.118/31	10.0.51.118 – 10.0.51.119	10.0.51.119
189	10.0.51.120/31	10.0.51.120 – 10.0.51.121	10.0.51.121
190	10.0.51.122/31	10.0.51.122 – 10.0.51.123	10.0.51.123
191	10.0.51.124/31	10.0.51.124 – 10.0.51.125	10.0.51.125
192	10.0.51.126/31	10.0.51.126 – 10.0.51.127	10.0.51.127
193	10.0.51.128/31	10.0.51.128 – 10.0.51.129	10.0.51.129
194	10.0.51.130/31	10.0.51.130 – 10.0.51.131	10.0.51.131
195	10.0.51.132/31	10.0.51.132 – 10.0.51.133	10.0.51.133
196	10.0.51.134/31	10.0.51.134 – 10.0.51.135	10.0.51.135
197	10.0.51.136/31	10.0.51.136 – 10.0.51.137	10.0.51.137
198	10.0.51.138/31	10.0.51.138 – 10.0.51.139	10.0.51.139
199	10.0.51.140/31	10.0.51.140 – 10.0.51.141	10.0.51.141
200	10.0.51.142/31	10.0.51.142 – 10.0.51.143	10.0.51.143
201	10.0.51.144/31	10.0.51.144 – 10.0.51.145	10.0.51.145
202	10.0.51.146/31	10.0.51.146 – 10.0.51.147	10.0.51.147
203	10.0.51.148/31	10.0.51.148 – 10.0.51.149	10.0.51.149
204	10.0.51.150/31	10.0.51.150 – 10.0.51.151	10.0.51.151
205	10.0.51.152/31	10.0.51.152 – 10.0.51.153	10.0.51.153
206	10.0.51.154/31	10.0.51.154 – 10.0.51.155	10.0.51.155
207	10.0.51.156/31	10.0.51.156 – 10.0.51.157	10.0.51.157
208	10.0.51.158/31	10.0.51.158 – 10.0.51.159	10.0.51.159
209	10.0.51.160/31	10.0.51.160 – 10.0.51.161	10.0.51.161
210	10.0.51.162/31	10.0.51.162 – 10.0.51.163	10.0.51.163
211	10.0.51.164/31	10.0.51.164 – 10.0.51.165	10.0.51.165
212	10.0.51.166/31	10.0.51.166 – 10.0.51.167	10.0.51.167
213	10.0.51.168/31	10.0.51.168 – 10.0.51.169	10.0.51.169
214	10.0.51.170/31	10.0.51.170 – 10.0.51.171	10.0.51.171
215	10.0.51.172/31	10.0.51.172 – 10.0.51.173	10.0.51.173
216	10.0.51.174/31	10.0.51.174 – 10.0.51.175	10.0.51.175
217	10.0.51.176/31	10.0.51.176 – 10.0.51.177	10.0.51.177
218	10.0.51.178/31	10.0.51.178 – 10.0.51.179	10.0.51.179
219	10.0.51.180/31	10.0.51.180 – 10.0.51.181	10.0.51.181
220	10.0.51.182/31	10.0.51.182 – 10.0.51.183	10.0.51.183
221	10.0.51.184/31	10.0.51.184 – 10.0.51.185	10.0.51.185
222	10.0.51.186/31	10.0.51.186 – 10.0.51.187	10.0.51.187
223	10.0.51.188/31	10.0.51.188 – 10.0.51.189	10.0.51.189
224	10.0.51.190/31	10.0.51.190 – 10.0.51.191	10.0.51.191
225	10.0.51.192/31	10.0.51.192 – 10.0.51.193	10.0.51.193
226	10.0.51.194/31	10.0.51.194 – 10.0.51.195	10.0.51.195
227	10.0.51.196/31	10.0.51.196 – 10.0.51.197	10.0.51.197
228	10.0.51.198/31	10.0.51.198 – 10.0.51.199	10.0.51.199
229	10.0.51.200/31	10.0.51.200 – 10.0.51.201	10.0.51.201
230	10.0.51.202/31	10.0.51.202 – 10.0.51.203	10.0.51.203
231	10.0.51.204/31	10.0.51.204 – 10.0.51.205	10.0.51.205
232	10.0.51.206/31	10.0.51.206 – 10.0.51.207	10.0.51.207
233	10.0.51.208/31	10.0.51.208 – 10.0.51.209	10.0.51.209
234	10.0.51.210/31	10.0.51.210 – 10.0.51.211	10.0.51.211
235	10.0.51.212/31	10.0.51.212 – 10.0.51.213	10.0.51.213
236	10.0.51.214/31	10.0.51.214 – 10.0.51.215	10.0.51.215
237	10.0.51.216/31	10.0.51.216 – 10.0.51.217	10.0.51.217
238	10.0.51.218/31	10.0.51.218 – 10.0.51.219	10.0.51.219
239	10.0.51.220/31	10.0.51.220 – 10.0.51.221	10.0.51.221
240	10.0.51.222/31	10.0.51.222 – 10.0.51.223	10.0.51.223
241	10.0.51.224/31	10.0.51.224 – 10.0.51.225	10.0.51.225
242	10.0.51.226/31	10.0.51.226 – 10.0.51.227	10.0.51.227
243	10.0.51.228/31	10.0.51.228 – 10.0.51.229	10.0.51.229
244	10.0.51.230/31	10.0.51.230 – 10.0.51.231	10.0.51.231
245	10.0.51.232/31	10.0.51.232 – 10.0.51.233	10.0.51.233
246	10.0.51.234/31	10.0.51.234 – 10.0.51.235	10.0.51.235
247	10.0.51.236/31	10.0.51.236 – 10.0.51.237	10.0.51.237
248	10.0.51.238/31	10.0.51.238 – 10.0.51.239	10.0.51.239
249	10.0.51.240/31	10.0.51.240 – 10.0.51.241	10.0.51.241
250	10.0.51.242/31	10.0.51.242 – 10.0.51.243	10.0.51.243
251	10.0.51.244/31	10.0.51.244 – 10.0.51.245	10.0.51.245
252	10.0.51.246/31	10.0.51.246 – 10.0.51.247	10.0.51.247
253	10.0.51.248/31	10.0.51.248 – 10.0.51.249	10.0.51.249
254	10.0.51.250/31	10.0.51.250 – 10.0.51.251	10.0.51.251
255	10.0.51.252/31	10.0.51.252 – 10.0.51.253	10.0.51.253
256	10.0.51.254/31	10.0.51.254 – 10.0.51.255	10.0.51.255

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 →