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)10.167.250.0/23

network10.167.250.0/23

broadcast10.167.251.255

first host10.167.250.1

last host10.167.251.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.250.0/23

address00001010.10100111.11111010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.11111010.00000000

broadcast00001010.10100111.11111011.11111111

green = network part, grey = host part

hex0x0aa7fa00

decimal178780672

reverse dns0.250.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:fa00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.250.0/31	10.167.250.0 – 10.167.250.1	10.167.250.1
2	10.167.250.2/31	10.167.250.2 – 10.167.250.3	10.167.250.3
3	10.167.250.4/31	10.167.250.4 – 10.167.250.5	10.167.250.5
4	10.167.250.6/31	10.167.250.6 – 10.167.250.7	10.167.250.7
5	10.167.250.8/31	10.167.250.8 – 10.167.250.9	10.167.250.9
6	10.167.250.10/31	10.167.250.10 – 10.167.250.11	10.167.250.11
7	10.167.250.12/31	10.167.250.12 – 10.167.250.13	10.167.250.13
8	10.167.250.14/31	10.167.250.14 – 10.167.250.15	10.167.250.15
9	10.167.250.16/31	10.167.250.16 – 10.167.250.17	10.167.250.17
10	10.167.250.18/31	10.167.250.18 – 10.167.250.19	10.167.250.19
11	10.167.250.20/31	10.167.250.20 – 10.167.250.21	10.167.250.21
12	10.167.250.22/31	10.167.250.22 – 10.167.250.23	10.167.250.23
13	10.167.250.24/31	10.167.250.24 – 10.167.250.25	10.167.250.25
14	10.167.250.26/31	10.167.250.26 – 10.167.250.27	10.167.250.27
15	10.167.250.28/31	10.167.250.28 – 10.167.250.29	10.167.250.29
16	10.167.250.30/31	10.167.250.30 – 10.167.250.31	10.167.250.31
17	10.167.250.32/31	10.167.250.32 – 10.167.250.33	10.167.250.33
18	10.167.250.34/31	10.167.250.34 – 10.167.250.35	10.167.250.35
19	10.167.250.36/31	10.167.250.36 – 10.167.250.37	10.167.250.37
20	10.167.250.38/31	10.167.250.38 – 10.167.250.39	10.167.250.39
21	10.167.250.40/31	10.167.250.40 – 10.167.250.41	10.167.250.41
22	10.167.250.42/31	10.167.250.42 – 10.167.250.43	10.167.250.43
23	10.167.250.44/31	10.167.250.44 – 10.167.250.45	10.167.250.45
24	10.167.250.46/31	10.167.250.46 – 10.167.250.47	10.167.250.47
25	10.167.250.48/31	10.167.250.48 – 10.167.250.49	10.167.250.49
26	10.167.250.50/31	10.167.250.50 – 10.167.250.51	10.167.250.51
27	10.167.250.52/31	10.167.250.52 – 10.167.250.53	10.167.250.53
28	10.167.250.54/31	10.167.250.54 – 10.167.250.55	10.167.250.55
29	10.167.250.56/31	10.167.250.56 – 10.167.250.57	10.167.250.57
30	10.167.250.58/31	10.167.250.58 – 10.167.250.59	10.167.250.59
31	10.167.250.60/31	10.167.250.60 – 10.167.250.61	10.167.250.61
32	10.167.250.62/31	10.167.250.62 – 10.167.250.63	10.167.250.63
33	10.167.250.64/31	10.167.250.64 – 10.167.250.65	10.167.250.65
34	10.167.250.66/31	10.167.250.66 – 10.167.250.67	10.167.250.67
35	10.167.250.68/31	10.167.250.68 – 10.167.250.69	10.167.250.69
36	10.167.250.70/31	10.167.250.70 – 10.167.250.71	10.167.250.71
37	10.167.250.72/31	10.167.250.72 – 10.167.250.73	10.167.250.73
38	10.167.250.74/31	10.167.250.74 – 10.167.250.75	10.167.250.75
39	10.167.250.76/31	10.167.250.76 – 10.167.250.77	10.167.250.77
40	10.167.250.78/31	10.167.250.78 – 10.167.250.79	10.167.250.79
41	10.167.250.80/31	10.167.250.80 – 10.167.250.81	10.167.250.81
42	10.167.250.82/31	10.167.250.82 – 10.167.250.83	10.167.250.83
43	10.167.250.84/31	10.167.250.84 – 10.167.250.85	10.167.250.85
44	10.167.250.86/31	10.167.250.86 – 10.167.250.87	10.167.250.87
45	10.167.250.88/31	10.167.250.88 – 10.167.250.89	10.167.250.89
46	10.167.250.90/31	10.167.250.90 – 10.167.250.91	10.167.250.91
47	10.167.250.92/31	10.167.250.92 – 10.167.250.93	10.167.250.93
48	10.167.250.94/31	10.167.250.94 – 10.167.250.95	10.167.250.95
49	10.167.250.96/31	10.167.250.96 – 10.167.250.97	10.167.250.97
50	10.167.250.98/31	10.167.250.98 – 10.167.250.99	10.167.250.99
51	10.167.250.100/31	10.167.250.100 – 10.167.250.101	10.167.250.101
52	10.167.250.102/31	10.167.250.102 – 10.167.250.103	10.167.250.103
53	10.167.250.104/31	10.167.250.104 – 10.167.250.105	10.167.250.105
54	10.167.250.106/31	10.167.250.106 – 10.167.250.107	10.167.250.107
55	10.167.250.108/31	10.167.250.108 – 10.167.250.109	10.167.250.109
56	10.167.250.110/31	10.167.250.110 – 10.167.250.111	10.167.250.111
57	10.167.250.112/31	10.167.250.112 – 10.167.250.113	10.167.250.113
58	10.167.250.114/31	10.167.250.114 – 10.167.250.115	10.167.250.115
59	10.167.250.116/31	10.167.250.116 – 10.167.250.117	10.167.250.117
60	10.167.250.118/31	10.167.250.118 – 10.167.250.119	10.167.250.119
61	10.167.250.120/31	10.167.250.120 – 10.167.250.121	10.167.250.121
62	10.167.250.122/31	10.167.250.122 – 10.167.250.123	10.167.250.123
63	10.167.250.124/31	10.167.250.124 – 10.167.250.125	10.167.250.125
64	10.167.250.126/31	10.167.250.126 – 10.167.250.127	10.167.250.127
65	10.167.250.128/31	10.167.250.128 – 10.167.250.129	10.167.250.129
66	10.167.250.130/31	10.167.250.130 – 10.167.250.131	10.167.250.131
67	10.167.250.132/31	10.167.250.132 – 10.167.250.133	10.167.250.133
68	10.167.250.134/31	10.167.250.134 – 10.167.250.135	10.167.250.135
69	10.167.250.136/31	10.167.250.136 – 10.167.250.137	10.167.250.137
70	10.167.250.138/31	10.167.250.138 – 10.167.250.139	10.167.250.139
71	10.167.250.140/31	10.167.250.140 – 10.167.250.141	10.167.250.141
72	10.167.250.142/31	10.167.250.142 – 10.167.250.143	10.167.250.143
73	10.167.250.144/31	10.167.250.144 – 10.167.250.145	10.167.250.145
74	10.167.250.146/31	10.167.250.146 – 10.167.250.147	10.167.250.147
75	10.167.250.148/31	10.167.250.148 – 10.167.250.149	10.167.250.149
76	10.167.250.150/31	10.167.250.150 – 10.167.250.151	10.167.250.151
77	10.167.250.152/31	10.167.250.152 – 10.167.250.153	10.167.250.153
78	10.167.250.154/31	10.167.250.154 – 10.167.250.155	10.167.250.155
79	10.167.250.156/31	10.167.250.156 – 10.167.250.157	10.167.250.157
80	10.167.250.158/31	10.167.250.158 – 10.167.250.159	10.167.250.159
81	10.167.250.160/31	10.167.250.160 – 10.167.250.161	10.167.250.161
82	10.167.250.162/31	10.167.250.162 – 10.167.250.163	10.167.250.163
83	10.167.250.164/31	10.167.250.164 – 10.167.250.165	10.167.250.165
84	10.167.250.166/31	10.167.250.166 – 10.167.250.167	10.167.250.167
85	10.167.250.168/31	10.167.250.168 – 10.167.250.169	10.167.250.169
86	10.167.250.170/31	10.167.250.170 – 10.167.250.171	10.167.250.171
87	10.167.250.172/31	10.167.250.172 – 10.167.250.173	10.167.250.173
88	10.167.250.174/31	10.167.250.174 – 10.167.250.175	10.167.250.175
89	10.167.250.176/31	10.167.250.176 – 10.167.250.177	10.167.250.177
90	10.167.250.178/31	10.167.250.178 – 10.167.250.179	10.167.250.179
91	10.167.250.180/31	10.167.250.180 – 10.167.250.181	10.167.250.181
92	10.167.250.182/31	10.167.250.182 – 10.167.250.183	10.167.250.183
93	10.167.250.184/31	10.167.250.184 – 10.167.250.185	10.167.250.185
94	10.167.250.186/31	10.167.250.186 – 10.167.250.187	10.167.250.187
95	10.167.250.188/31	10.167.250.188 – 10.167.250.189	10.167.250.189
96	10.167.250.190/31	10.167.250.190 – 10.167.250.191	10.167.250.191
97	10.167.250.192/31	10.167.250.192 – 10.167.250.193	10.167.250.193
98	10.167.250.194/31	10.167.250.194 – 10.167.250.195	10.167.250.195
99	10.167.250.196/31	10.167.250.196 – 10.167.250.197	10.167.250.197
100	10.167.250.198/31	10.167.250.198 – 10.167.250.199	10.167.250.199
101	10.167.250.200/31	10.167.250.200 – 10.167.250.201	10.167.250.201
102	10.167.250.202/31	10.167.250.202 – 10.167.250.203	10.167.250.203
103	10.167.250.204/31	10.167.250.204 – 10.167.250.205	10.167.250.205
104	10.167.250.206/31	10.167.250.206 – 10.167.250.207	10.167.250.207
105	10.167.250.208/31	10.167.250.208 – 10.167.250.209	10.167.250.209
106	10.167.250.210/31	10.167.250.210 – 10.167.250.211	10.167.250.211
107	10.167.250.212/31	10.167.250.212 – 10.167.250.213	10.167.250.213
108	10.167.250.214/31	10.167.250.214 – 10.167.250.215	10.167.250.215
109	10.167.250.216/31	10.167.250.216 – 10.167.250.217	10.167.250.217
110	10.167.250.218/31	10.167.250.218 – 10.167.250.219	10.167.250.219
111	10.167.250.220/31	10.167.250.220 – 10.167.250.221	10.167.250.221
112	10.167.250.222/31	10.167.250.222 – 10.167.250.223	10.167.250.223
113	10.167.250.224/31	10.167.250.224 – 10.167.250.225	10.167.250.225
114	10.167.250.226/31	10.167.250.226 – 10.167.250.227	10.167.250.227
115	10.167.250.228/31	10.167.250.228 – 10.167.250.229	10.167.250.229
116	10.167.250.230/31	10.167.250.230 – 10.167.250.231	10.167.250.231
117	10.167.250.232/31	10.167.250.232 – 10.167.250.233	10.167.250.233
118	10.167.250.234/31	10.167.250.234 – 10.167.250.235	10.167.250.235
119	10.167.250.236/31	10.167.250.236 – 10.167.250.237	10.167.250.237
120	10.167.250.238/31	10.167.250.238 – 10.167.250.239	10.167.250.239
121	10.167.250.240/31	10.167.250.240 – 10.167.250.241	10.167.250.241
122	10.167.250.242/31	10.167.250.242 – 10.167.250.243	10.167.250.243
123	10.167.250.244/31	10.167.250.244 – 10.167.250.245	10.167.250.245
124	10.167.250.246/31	10.167.250.246 – 10.167.250.247	10.167.250.247
125	10.167.250.248/31	10.167.250.248 – 10.167.250.249	10.167.250.249
126	10.167.250.250/31	10.167.250.250 – 10.167.250.251	10.167.250.251
127	10.167.250.252/31	10.167.250.252 – 10.167.250.253	10.167.250.253
128	10.167.250.254/31	10.167.250.254 – 10.167.250.255	10.167.250.255
129	10.167.251.0/31	10.167.251.0 – 10.167.251.1	10.167.251.1
130	10.167.251.2/31	10.167.251.2 – 10.167.251.3	10.167.251.3
131	10.167.251.4/31	10.167.251.4 – 10.167.251.5	10.167.251.5
132	10.167.251.6/31	10.167.251.6 – 10.167.251.7	10.167.251.7
133	10.167.251.8/31	10.167.251.8 – 10.167.251.9	10.167.251.9
134	10.167.251.10/31	10.167.251.10 – 10.167.251.11	10.167.251.11
135	10.167.251.12/31	10.167.251.12 – 10.167.251.13	10.167.251.13
136	10.167.251.14/31	10.167.251.14 – 10.167.251.15	10.167.251.15
137	10.167.251.16/31	10.167.251.16 – 10.167.251.17	10.167.251.17
138	10.167.251.18/31	10.167.251.18 – 10.167.251.19	10.167.251.19
139	10.167.251.20/31	10.167.251.20 – 10.167.251.21	10.167.251.21
140	10.167.251.22/31	10.167.251.22 – 10.167.251.23	10.167.251.23
141	10.167.251.24/31	10.167.251.24 – 10.167.251.25	10.167.251.25
142	10.167.251.26/31	10.167.251.26 – 10.167.251.27	10.167.251.27
143	10.167.251.28/31	10.167.251.28 – 10.167.251.29	10.167.251.29
144	10.167.251.30/31	10.167.251.30 – 10.167.251.31	10.167.251.31
145	10.167.251.32/31	10.167.251.32 – 10.167.251.33	10.167.251.33
146	10.167.251.34/31	10.167.251.34 – 10.167.251.35	10.167.251.35
147	10.167.251.36/31	10.167.251.36 – 10.167.251.37	10.167.251.37
148	10.167.251.38/31	10.167.251.38 – 10.167.251.39	10.167.251.39
149	10.167.251.40/31	10.167.251.40 – 10.167.251.41	10.167.251.41
150	10.167.251.42/31	10.167.251.42 – 10.167.251.43	10.167.251.43
151	10.167.251.44/31	10.167.251.44 – 10.167.251.45	10.167.251.45
152	10.167.251.46/31	10.167.251.46 – 10.167.251.47	10.167.251.47
153	10.167.251.48/31	10.167.251.48 – 10.167.251.49	10.167.251.49
154	10.167.251.50/31	10.167.251.50 – 10.167.251.51	10.167.251.51
155	10.167.251.52/31	10.167.251.52 – 10.167.251.53	10.167.251.53
156	10.167.251.54/31	10.167.251.54 – 10.167.251.55	10.167.251.55
157	10.167.251.56/31	10.167.251.56 – 10.167.251.57	10.167.251.57
158	10.167.251.58/31	10.167.251.58 – 10.167.251.59	10.167.251.59
159	10.167.251.60/31	10.167.251.60 – 10.167.251.61	10.167.251.61
160	10.167.251.62/31	10.167.251.62 – 10.167.251.63	10.167.251.63
161	10.167.251.64/31	10.167.251.64 – 10.167.251.65	10.167.251.65
162	10.167.251.66/31	10.167.251.66 – 10.167.251.67	10.167.251.67
163	10.167.251.68/31	10.167.251.68 – 10.167.251.69	10.167.251.69
164	10.167.251.70/31	10.167.251.70 – 10.167.251.71	10.167.251.71
165	10.167.251.72/31	10.167.251.72 – 10.167.251.73	10.167.251.73
166	10.167.251.74/31	10.167.251.74 – 10.167.251.75	10.167.251.75
167	10.167.251.76/31	10.167.251.76 – 10.167.251.77	10.167.251.77
168	10.167.251.78/31	10.167.251.78 – 10.167.251.79	10.167.251.79
169	10.167.251.80/31	10.167.251.80 – 10.167.251.81	10.167.251.81
170	10.167.251.82/31	10.167.251.82 – 10.167.251.83	10.167.251.83
171	10.167.251.84/31	10.167.251.84 – 10.167.251.85	10.167.251.85
172	10.167.251.86/31	10.167.251.86 – 10.167.251.87	10.167.251.87
173	10.167.251.88/31	10.167.251.88 – 10.167.251.89	10.167.251.89
174	10.167.251.90/31	10.167.251.90 – 10.167.251.91	10.167.251.91
175	10.167.251.92/31	10.167.251.92 – 10.167.251.93	10.167.251.93
176	10.167.251.94/31	10.167.251.94 – 10.167.251.95	10.167.251.95
177	10.167.251.96/31	10.167.251.96 – 10.167.251.97	10.167.251.97
178	10.167.251.98/31	10.167.251.98 – 10.167.251.99	10.167.251.99
179	10.167.251.100/31	10.167.251.100 – 10.167.251.101	10.167.251.101
180	10.167.251.102/31	10.167.251.102 – 10.167.251.103	10.167.251.103
181	10.167.251.104/31	10.167.251.104 – 10.167.251.105	10.167.251.105
182	10.167.251.106/31	10.167.251.106 – 10.167.251.107	10.167.251.107
183	10.167.251.108/31	10.167.251.108 – 10.167.251.109	10.167.251.109
184	10.167.251.110/31	10.167.251.110 – 10.167.251.111	10.167.251.111
185	10.167.251.112/31	10.167.251.112 – 10.167.251.113	10.167.251.113
186	10.167.251.114/31	10.167.251.114 – 10.167.251.115	10.167.251.115
187	10.167.251.116/31	10.167.251.116 – 10.167.251.117	10.167.251.117
188	10.167.251.118/31	10.167.251.118 – 10.167.251.119	10.167.251.119
189	10.167.251.120/31	10.167.251.120 – 10.167.251.121	10.167.251.121
190	10.167.251.122/31	10.167.251.122 – 10.167.251.123	10.167.251.123
191	10.167.251.124/31	10.167.251.124 – 10.167.251.125	10.167.251.125
192	10.167.251.126/31	10.167.251.126 – 10.167.251.127	10.167.251.127
193	10.167.251.128/31	10.167.251.128 – 10.167.251.129	10.167.251.129
194	10.167.251.130/31	10.167.251.130 – 10.167.251.131	10.167.251.131
195	10.167.251.132/31	10.167.251.132 – 10.167.251.133	10.167.251.133
196	10.167.251.134/31	10.167.251.134 – 10.167.251.135	10.167.251.135
197	10.167.251.136/31	10.167.251.136 – 10.167.251.137	10.167.251.137
198	10.167.251.138/31	10.167.251.138 – 10.167.251.139	10.167.251.139
199	10.167.251.140/31	10.167.251.140 – 10.167.251.141	10.167.251.141
200	10.167.251.142/31	10.167.251.142 – 10.167.251.143	10.167.251.143
201	10.167.251.144/31	10.167.251.144 – 10.167.251.145	10.167.251.145
202	10.167.251.146/31	10.167.251.146 – 10.167.251.147	10.167.251.147
203	10.167.251.148/31	10.167.251.148 – 10.167.251.149	10.167.251.149
204	10.167.251.150/31	10.167.251.150 – 10.167.251.151	10.167.251.151
205	10.167.251.152/31	10.167.251.152 – 10.167.251.153	10.167.251.153
206	10.167.251.154/31	10.167.251.154 – 10.167.251.155	10.167.251.155
207	10.167.251.156/31	10.167.251.156 – 10.167.251.157	10.167.251.157
208	10.167.251.158/31	10.167.251.158 – 10.167.251.159	10.167.251.159
209	10.167.251.160/31	10.167.251.160 – 10.167.251.161	10.167.251.161
210	10.167.251.162/31	10.167.251.162 – 10.167.251.163	10.167.251.163
211	10.167.251.164/31	10.167.251.164 – 10.167.251.165	10.167.251.165
212	10.167.251.166/31	10.167.251.166 – 10.167.251.167	10.167.251.167
213	10.167.251.168/31	10.167.251.168 – 10.167.251.169	10.167.251.169
214	10.167.251.170/31	10.167.251.170 – 10.167.251.171	10.167.251.171
215	10.167.251.172/31	10.167.251.172 – 10.167.251.173	10.167.251.173
216	10.167.251.174/31	10.167.251.174 – 10.167.251.175	10.167.251.175
217	10.167.251.176/31	10.167.251.176 – 10.167.251.177	10.167.251.177
218	10.167.251.178/31	10.167.251.178 – 10.167.251.179	10.167.251.179
219	10.167.251.180/31	10.167.251.180 – 10.167.251.181	10.167.251.181
220	10.167.251.182/31	10.167.251.182 – 10.167.251.183	10.167.251.183
221	10.167.251.184/31	10.167.251.184 – 10.167.251.185	10.167.251.185
222	10.167.251.186/31	10.167.251.186 – 10.167.251.187	10.167.251.187
223	10.167.251.188/31	10.167.251.188 – 10.167.251.189	10.167.251.189
224	10.167.251.190/31	10.167.251.190 – 10.167.251.191	10.167.251.191
225	10.167.251.192/31	10.167.251.192 – 10.167.251.193	10.167.251.193
226	10.167.251.194/31	10.167.251.194 – 10.167.251.195	10.167.251.195
227	10.167.251.196/31	10.167.251.196 – 10.167.251.197	10.167.251.197
228	10.167.251.198/31	10.167.251.198 – 10.167.251.199	10.167.251.199
229	10.167.251.200/31	10.167.251.200 – 10.167.251.201	10.167.251.201
230	10.167.251.202/31	10.167.251.202 – 10.167.251.203	10.167.251.203
231	10.167.251.204/31	10.167.251.204 – 10.167.251.205	10.167.251.205
232	10.167.251.206/31	10.167.251.206 – 10.167.251.207	10.167.251.207
233	10.167.251.208/31	10.167.251.208 – 10.167.251.209	10.167.251.209
234	10.167.251.210/31	10.167.251.210 – 10.167.251.211	10.167.251.211
235	10.167.251.212/31	10.167.251.212 – 10.167.251.213	10.167.251.213
236	10.167.251.214/31	10.167.251.214 – 10.167.251.215	10.167.251.215
237	10.167.251.216/31	10.167.251.216 – 10.167.251.217	10.167.251.217
238	10.167.251.218/31	10.167.251.218 – 10.167.251.219	10.167.251.219
239	10.167.251.220/31	10.167.251.220 – 10.167.251.221	10.167.251.221
240	10.167.251.222/31	10.167.251.222 – 10.167.251.223	10.167.251.223
241	10.167.251.224/31	10.167.251.224 – 10.167.251.225	10.167.251.225
242	10.167.251.226/31	10.167.251.226 – 10.167.251.227	10.167.251.227
243	10.167.251.228/31	10.167.251.228 – 10.167.251.229	10.167.251.229
244	10.167.251.230/31	10.167.251.230 – 10.167.251.231	10.167.251.231
245	10.167.251.232/31	10.167.251.232 – 10.167.251.233	10.167.251.233
246	10.167.251.234/31	10.167.251.234 – 10.167.251.235	10.167.251.235
247	10.167.251.236/31	10.167.251.236 – 10.167.251.237	10.167.251.237
248	10.167.251.238/31	10.167.251.238 – 10.167.251.239	10.167.251.239
249	10.167.251.240/31	10.167.251.240 – 10.167.251.241	10.167.251.241
250	10.167.251.242/31	10.167.251.242 – 10.167.251.243	10.167.251.243
251	10.167.251.244/31	10.167.251.244 – 10.167.251.245	10.167.251.245
252	10.167.251.246/31	10.167.251.246 – 10.167.251.247	10.167.251.247
253	10.167.251.248/31	10.167.251.248 – 10.167.251.249	10.167.251.249
254	10.167.251.250/31	10.167.251.250 – 10.167.251.251	10.167.251.251
255	10.167.251.252/31	10.167.251.252 – 10.167.251.253	10.167.251.253
256	10.167.251.254/31	10.167.251.254 – 10.167.251.255	10.167.251.255

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 →