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)10.78.154.0/23

network10.78.154.0/23

broadcast10.78.155.255

first host10.78.154.1

last host10.78.155.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.154.0/23

address00001010.01001110.10011010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.10011010.00000000

broadcast00001010.01001110.10011011.11111111

green = network part, grey = host part

hex0x0a4e9a00

decimal172923392

reverse dns0.154.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:9a00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.78.154.0/31	10.78.154.0 – 10.78.154.1	10.78.154.1
2	10.78.154.2/31	10.78.154.2 – 10.78.154.3	10.78.154.3
3	10.78.154.4/31	10.78.154.4 – 10.78.154.5	10.78.154.5
4	10.78.154.6/31	10.78.154.6 – 10.78.154.7	10.78.154.7
5	10.78.154.8/31	10.78.154.8 – 10.78.154.9	10.78.154.9
6	10.78.154.10/31	10.78.154.10 – 10.78.154.11	10.78.154.11
7	10.78.154.12/31	10.78.154.12 – 10.78.154.13	10.78.154.13
8	10.78.154.14/31	10.78.154.14 – 10.78.154.15	10.78.154.15
9	10.78.154.16/31	10.78.154.16 – 10.78.154.17	10.78.154.17
10	10.78.154.18/31	10.78.154.18 – 10.78.154.19	10.78.154.19
11	10.78.154.20/31	10.78.154.20 – 10.78.154.21	10.78.154.21
12	10.78.154.22/31	10.78.154.22 – 10.78.154.23	10.78.154.23
13	10.78.154.24/31	10.78.154.24 – 10.78.154.25	10.78.154.25
14	10.78.154.26/31	10.78.154.26 – 10.78.154.27	10.78.154.27
15	10.78.154.28/31	10.78.154.28 – 10.78.154.29	10.78.154.29
16	10.78.154.30/31	10.78.154.30 – 10.78.154.31	10.78.154.31
17	10.78.154.32/31	10.78.154.32 – 10.78.154.33	10.78.154.33
18	10.78.154.34/31	10.78.154.34 – 10.78.154.35	10.78.154.35
19	10.78.154.36/31	10.78.154.36 – 10.78.154.37	10.78.154.37
20	10.78.154.38/31	10.78.154.38 – 10.78.154.39	10.78.154.39
21	10.78.154.40/31	10.78.154.40 – 10.78.154.41	10.78.154.41
22	10.78.154.42/31	10.78.154.42 – 10.78.154.43	10.78.154.43
23	10.78.154.44/31	10.78.154.44 – 10.78.154.45	10.78.154.45
24	10.78.154.46/31	10.78.154.46 – 10.78.154.47	10.78.154.47
25	10.78.154.48/31	10.78.154.48 – 10.78.154.49	10.78.154.49
26	10.78.154.50/31	10.78.154.50 – 10.78.154.51	10.78.154.51
27	10.78.154.52/31	10.78.154.52 – 10.78.154.53	10.78.154.53
28	10.78.154.54/31	10.78.154.54 – 10.78.154.55	10.78.154.55
29	10.78.154.56/31	10.78.154.56 – 10.78.154.57	10.78.154.57
30	10.78.154.58/31	10.78.154.58 – 10.78.154.59	10.78.154.59
31	10.78.154.60/31	10.78.154.60 – 10.78.154.61	10.78.154.61
32	10.78.154.62/31	10.78.154.62 – 10.78.154.63	10.78.154.63
33	10.78.154.64/31	10.78.154.64 – 10.78.154.65	10.78.154.65
34	10.78.154.66/31	10.78.154.66 – 10.78.154.67	10.78.154.67
35	10.78.154.68/31	10.78.154.68 – 10.78.154.69	10.78.154.69
36	10.78.154.70/31	10.78.154.70 – 10.78.154.71	10.78.154.71
37	10.78.154.72/31	10.78.154.72 – 10.78.154.73	10.78.154.73
38	10.78.154.74/31	10.78.154.74 – 10.78.154.75	10.78.154.75
39	10.78.154.76/31	10.78.154.76 – 10.78.154.77	10.78.154.77
40	10.78.154.78/31	10.78.154.78 – 10.78.154.79	10.78.154.79
41	10.78.154.80/31	10.78.154.80 – 10.78.154.81	10.78.154.81
42	10.78.154.82/31	10.78.154.82 – 10.78.154.83	10.78.154.83
43	10.78.154.84/31	10.78.154.84 – 10.78.154.85	10.78.154.85
44	10.78.154.86/31	10.78.154.86 – 10.78.154.87	10.78.154.87
45	10.78.154.88/31	10.78.154.88 – 10.78.154.89	10.78.154.89
46	10.78.154.90/31	10.78.154.90 – 10.78.154.91	10.78.154.91
47	10.78.154.92/31	10.78.154.92 – 10.78.154.93	10.78.154.93
48	10.78.154.94/31	10.78.154.94 – 10.78.154.95	10.78.154.95
49	10.78.154.96/31	10.78.154.96 – 10.78.154.97	10.78.154.97
50	10.78.154.98/31	10.78.154.98 – 10.78.154.99	10.78.154.99
51	10.78.154.100/31	10.78.154.100 – 10.78.154.101	10.78.154.101
52	10.78.154.102/31	10.78.154.102 – 10.78.154.103	10.78.154.103
53	10.78.154.104/31	10.78.154.104 – 10.78.154.105	10.78.154.105
54	10.78.154.106/31	10.78.154.106 – 10.78.154.107	10.78.154.107
55	10.78.154.108/31	10.78.154.108 – 10.78.154.109	10.78.154.109
56	10.78.154.110/31	10.78.154.110 – 10.78.154.111	10.78.154.111
57	10.78.154.112/31	10.78.154.112 – 10.78.154.113	10.78.154.113
58	10.78.154.114/31	10.78.154.114 – 10.78.154.115	10.78.154.115
59	10.78.154.116/31	10.78.154.116 – 10.78.154.117	10.78.154.117
60	10.78.154.118/31	10.78.154.118 – 10.78.154.119	10.78.154.119
61	10.78.154.120/31	10.78.154.120 – 10.78.154.121	10.78.154.121
62	10.78.154.122/31	10.78.154.122 – 10.78.154.123	10.78.154.123
63	10.78.154.124/31	10.78.154.124 – 10.78.154.125	10.78.154.125
64	10.78.154.126/31	10.78.154.126 – 10.78.154.127	10.78.154.127
65	10.78.154.128/31	10.78.154.128 – 10.78.154.129	10.78.154.129
66	10.78.154.130/31	10.78.154.130 – 10.78.154.131	10.78.154.131
67	10.78.154.132/31	10.78.154.132 – 10.78.154.133	10.78.154.133
68	10.78.154.134/31	10.78.154.134 – 10.78.154.135	10.78.154.135
69	10.78.154.136/31	10.78.154.136 – 10.78.154.137	10.78.154.137
70	10.78.154.138/31	10.78.154.138 – 10.78.154.139	10.78.154.139
71	10.78.154.140/31	10.78.154.140 – 10.78.154.141	10.78.154.141
72	10.78.154.142/31	10.78.154.142 – 10.78.154.143	10.78.154.143
73	10.78.154.144/31	10.78.154.144 – 10.78.154.145	10.78.154.145
74	10.78.154.146/31	10.78.154.146 – 10.78.154.147	10.78.154.147
75	10.78.154.148/31	10.78.154.148 – 10.78.154.149	10.78.154.149
76	10.78.154.150/31	10.78.154.150 – 10.78.154.151	10.78.154.151
77	10.78.154.152/31	10.78.154.152 – 10.78.154.153	10.78.154.153
78	10.78.154.154/31	10.78.154.154 – 10.78.154.155	10.78.154.155
79	10.78.154.156/31	10.78.154.156 – 10.78.154.157	10.78.154.157
80	10.78.154.158/31	10.78.154.158 – 10.78.154.159	10.78.154.159
81	10.78.154.160/31	10.78.154.160 – 10.78.154.161	10.78.154.161
82	10.78.154.162/31	10.78.154.162 – 10.78.154.163	10.78.154.163
83	10.78.154.164/31	10.78.154.164 – 10.78.154.165	10.78.154.165
84	10.78.154.166/31	10.78.154.166 – 10.78.154.167	10.78.154.167
85	10.78.154.168/31	10.78.154.168 – 10.78.154.169	10.78.154.169
86	10.78.154.170/31	10.78.154.170 – 10.78.154.171	10.78.154.171
87	10.78.154.172/31	10.78.154.172 – 10.78.154.173	10.78.154.173
88	10.78.154.174/31	10.78.154.174 – 10.78.154.175	10.78.154.175
89	10.78.154.176/31	10.78.154.176 – 10.78.154.177	10.78.154.177
90	10.78.154.178/31	10.78.154.178 – 10.78.154.179	10.78.154.179
91	10.78.154.180/31	10.78.154.180 – 10.78.154.181	10.78.154.181
92	10.78.154.182/31	10.78.154.182 – 10.78.154.183	10.78.154.183
93	10.78.154.184/31	10.78.154.184 – 10.78.154.185	10.78.154.185
94	10.78.154.186/31	10.78.154.186 – 10.78.154.187	10.78.154.187
95	10.78.154.188/31	10.78.154.188 – 10.78.154.189	10.78.154.189
96	10.78.154.190/31	10.78.154.190 – 10.78.154.191	10.78.154.191
97	10.78.154.192/31	10.78.154.192 – 10.78.154.193	10.78.154.193
98	10.78.154.194/31	10.78.154.194 – 10.78.154.195	10.78.154.195
99	10.78.154.196/31	10.78.154.196 – 10.78.154.197	10.78.154.197
100	10.78.154.198/31	10.78.154.198 – 10.78.154.199	10.78.154.199
101	10.78.154.200/31	10.78.154.200 – 10.78.154.201	10.78.154.201
102	10.78.154.202/31	10.78.154.202 – 10.78.154.203	10.78.154.203
103	10.78.154.204/31	10.78.154.204 – 10.78.154.205	10.78.154.205
104	10.78.154.206/31	10.78.154.206 – 10.78.154.207	10.78.154.207
105	10.78.154.208/31	10.78.154.208 – 10.78.154.209	10.78.154.209
106	10.78.154.210/31	10.78.154.210 – 10.78.154.211	10.78.154.211
107	10.78.154.212/31	10.78.154.212 – 10.78.154.213	10.78.154.213
108	10.78.154.214/31	10.78.154.214 – 10.78.154.215	10.78.154.215
109	10.78.154.216/31	10.78.154.216 – 10.78.154.217	10.78.154.217
110	10.78.154.218/31	10.78.154.218 – 10.78.154.219	10.78.154.219
111	10.78.154.220/31	10.78.154.220 – 10.78.154.221	10.78.154.221
112	10.78.154.222/31	10.78.154.222 – 10.78.154.223	10.78.154.223
113	10.78.154.224/31	10.78.154.224 – 10.78.154.225	10.78.154.225
114	10.78.154.226/31	10.78.154.226 – 10.78.154.227	10.78.154.227
115	10.78.154.228/31	10.78.154.228 – 10.78.154.229	10.78.154.229
116	10.78.154.230/31	10.78.154.230 – 10.78.154.231	10.78.154.231
117	10.78.154.232/31	10.78.154.232 – 10.78.154.233	10.78.154.233
118	10.78.154.234/31	10.78.154.234 – 10.78.154.235	10.78.154.235
119	10.78.154.236/31	10.78.154.236 – 10.78.154.237	10.78.154.237
120	10.78.154.238/31	10.78.154.238 – 10.78.154.239	10.78.154.239
121	10.78.154.240/31	10.78.154.240 – 10.78.154.241	10.78.154.241
122	10.78.154.242/31	10.78.154.242 – 10.78.154.243	10.78.154.243
123	10.78.154.244/31	10.78.154.244 – 10.78.154.245	10.78.154.245
124	10.78.154.246/31	10.78.154.246 – 10.78.154.247	10.78.154.247
125	10.78.154.248/31	10.78.154.248 – 10.78.154.249	10.78.154.249
126	10.78.154.250/31	10.78.154.250 – 10.78.154.251	10.78.154.251
127	10.78.154.252/31	10.78.154.252 – 10.78.154.253	10.78.154.253
128	10.78.154.254/31	10.78.154.254 – 10.78.154.255	10.78.154.255
129	10.78.155.0/31	10.78.155.0 – 10.78.155.1	10.78.155.1
130	10.78.155.2/31	10.78.155.2 – 10.78.155.3	10.78.155.3
131	10.78.155.4/31	10.78.155.4 – 10.78.155.5	10.78.155.5
132	10.78.155.6/31	10.78.155.6 – 10.78.155.7	10.78.155.7
133	10.78.155.8/31	10.78.155.8 – 10.78.155.9	10.78.155.9
134	10.78.155.10/31	10.78.155.10 – 10.78.155.11	10.78.155.11
135	10.78.155.12/31	10.78.155.12 – 10.78.155.13	10.78.155.13
136	10.78.155.14/31	10.78.155.14 – 10.78.155.15	10.78.155.15
137	10.78.155.16/31	10.78.155.16 – 10.78.155.17	10.78.155.17
138	10.78.155.18/31	10.78.155.18 – 10.78.155.19	10.78.155.19
139	10.78.155.20/31	10.78.155.20 – 10.78.155.21	10.78.155.21
140	10.78.155.22/31	10.78.155.22 – 10.78.155.23	10.78.155.23
141	10.78.155.24/31	10.78.155.24 – 10.78.155.25	10.78.155.25
142	10.78.155.26/31	10.78.155.26 – 10.78.155.27	10.78.155.27
143	10.78.155.28/31	10.78.155.28 – 10.78.155.29	10.78.155.29
144	10.78.155.30/31	10.78.155.30 – 10.78.155.31	10.78.155.31
145	10.78.155.32/31	10.78.155.32 – 10.78.155.33	10.78.155.33
146	10.78.155.34/31	10.78.155.34 – 10.78.155.35	10.78.155.35
147	10.78.155.36/31	10.78.155.36 – 10.78.155.37	10.78.155.37
148	10.78.155.38/31	10.78.155.38 – 10.78.155.39	10.78.155.39
149	10.78.155.40/31	10.78.155.40 – 10.78.155.41	10.78.155.41
150	10.78.155.42/31	10.78.155.42 – 10.78.155.43	10.78.155.43
151	10.78.155.44/31	10.78.155.44 – 10.78.155.45	10.78.155.45
152	10.78.155.46/31	10.78.155.46 – 10.78.155.47	10.78.155.47
153	10.78.155.48/31	10.78.155.48 – 10.78.155.49	10.78.155.49
154	10.78.155.50/31	10.78.155.50 – 10.78.155.51	10.78.155.51
155	10.78.155.52/31	10.78.155.52 – 10.78.155.53	10.78.155.53
156	10.78.155.54/31	10.78.155.54 – 10.78.155.55	10.78.155.55
157	10.78.155.56/31	10.78.155.56 – 10.78.155.57	10.78.155.57
158	10.78.155.58/31	10.78.155.58 – 10.78.155.59	10.78.155.59
159	10.78.155.60/31	10.78.155.60 – 10.78.155.61	10.78.155.61
160	10.78.155.62/31	10.78.155.62 – 10.78.155.63	10.78.155.63
161	10.78.155.64/31	10.78.155.64 – 10.78.155.65	10.78.155.65
162	10.78.155.66/31	10.78.155.66 – 10.78.155.67	10.78.155.67
163	10.78.155.68/31	10.78.155.68 – 10.78.155.69	10.78.155.69
164	10.78.155.70/31	10.78.155.70 – 10.78.155.71	10.78.155.71
165	10.78.155.72/31	10.78.155.72 – 10.78.155.73	10.78.155.73
166	10.78.155.74/31	10.78.155.74 – 10.78.155.75	10.78.155.75
167	10.78.155.76/31	10.78.155.76 – 10.78.155.77	10.78.155.77
168	10.78.155.78/31	10.78.155.78 – 10.78.155.79	10.78.155.79
169	10.78.155.80/31	10.78.155.80 – 10.78.155.81	10.78.155.81
170	10.78.155.82/31	10.78.155.82 – 10.78.155.83	10.78.155.83
171	10.78.155.84/31	10.78.155.84 – 10.78.155.85	10.78.155.85
172	10.78.155.86/31	10.78.155.86 – 10.78.155.87	10.78.155.87
173	10.78.155.88/31	10.78.155.88 – 10.78.155.89	10.78.155.89
174	10.78.155.90/31	10.78.155.90 – 10.78.155.91	10.78.155.91
175	10.78.155.92/31	10.78.155.92 – 10.78.155.93	10.78.155.93
176	10.78.155.94/31	10.78.155.94 – 10.78.155.95	10.78.155.95
177	10.78.155.96/31	10.78.155.96 – 10.78.155.97	10.78.155.97
178	10.78.155.98/31	10.78.155.98 – 10.78.155.99	10.78.155.99
179	10.78.155.100/31	10.78.155.100 – 10.78.155.101	10.78.155.101
180	10.78.155.102/31	10.78.155.102 – 10.78.155.103	10.78.155.103
181	10.78.155.104/31	10.78.155.104 – 10.78.155.105	10.78.155.105
182	10.78.155.106/31	10.78.155.106 – 10.78.155.107	10.78.155.107
183	10.78.155.108/31	10.78.155.108 – 10.78.155.109	10.78.155.109
184	10.78.155.110/31	10.78.155.110 – 10.78.155.111	10.78.155.111
185	10.78.155.112/31	10.78.155.112 – 10.78.155.113	10.78.155.113
186	10.78.155.114/31	10.78.155.114 – 10.78.155.115	10.78.155.115
187	10.78.155.116/31	10.78.155.116 – 10.78.155.117	10.78.155.117
188	10.78.155.118/31	10.78.155.118 – 10.78.155.119	10.78.155.119
189	10.78.155.120/31	10.78.155.120 – 10.78.155.121	10.78.155.121
190	10.78.155.122/31	10.78.155.122 – 10.78.155.123	10.78.155.123
191	10.78.155.124/31	10.78.155.124 – 10.78.155.125	10.78.155.125
192	10.78.155.126/31	10.78.155.126 – 10.78.155.127	10.78.155.127
193	10.78.155.128/31	10.78.155.128 – 10.78.155.129	10.78.155.129
194	10.78.155.130/31	10.78.155.130 – 10.78.155.131	10.78.155.131
195	10.78.155.132/31	10.78.155.132 – 10.78.155.133	10.78.155.133
196	10.78.155.134/31	10.78.155.134 – 10.78.155.135	10.78.155.135
197	10.78.155.136/31	10.78.155.136 – 10.78.155.137	10.78.155.137
198	10.78.155.138/31	10.78.155.138 – 10.78.155.139	10.78.155.139
199	10.78.155.140/31	10.78.155.140 – 10.78.155.141	10.78.155.141
200	10.78.155.142/31	10.78.155.142 – 10.78.155.143	10.78.155.143
201	10.78.155.144/31	10.78.155.144 – 10.78.155.145	10.78.155.145
202	10.78.155.146/31	10.78.155.146 – 10.78.155.147	10.78.155.147
203	10.78.155.148/31	10.78.155.148 – 10.78.155.149	10.78.155.149
204	10.78.155.150/31	10.78.155.150 – 10.78.155.151	10.78.155.151
205	10.78.155.152/31	10.78.155.152 – 10.78.155.153	10.78.155.153
206	10.78.155.154/31	10.78.155.154 – 10.78.155.155	10.78.155.155
207	10.78.155.156/31	10.78.155.156 – 10.78.155.157	10.78.155.157
208	10.78.155.158/31	10.78.155.158 – 10.78.155.159	10.78.155.159
209	10.78.155.160/31	10.78.155.160 – 10.78.155.161	10.78.155.161
210	10.78.155.162/31	10.78.155.162 – 10.78.155.163	10.78.155.163
211	10.78.155.164/31	10.78.155.164 – 10.78.155.165	10.78.155.165
212	10.78.155.166/31	10.78.155.166 – 10.78.155.167	10.78.155.167
213	10.78.155.168/31	10.78.155.168 – 10.78.155.169	10.78.155.169
214	10.78.155.170/31	10.78.155.170 – 10.78.155.171	10.78.155.171
215	10.78.155.172/31	10.78.155.172 – 10.78.155.173	10.78.155.173
216	10.78.155.174/31	10.78.155.174 – 10.78.155.175	10.78.155.175
217	10.78.155.176/31	10.78.155.176 – 10.78.155.177	10.78.155.177
218	10.78.155.178/31	10.78.155.178 – 10.78.155.179	10.78.155.179
219	10.78.155.180/31	10.78.155.180 – 10.78.155.181	10.78.155.181
220	10.78.155.182/31	10.78.155.182 – 10.78.155.183	10.78.155.183
221	10.78.155.184/31	10.78.155.184 – 10.78.155.185	10.78.155.185
222	10.78.155.186/31	10.78.155.186 – 10.78.155.187	10.78.155.187
223	10.78.155.188/31	10.78.155.188 – 10.78.155.189	10.78.155.189
224	10.78.155.190/31	10.78.155.190 – 10.78.155.191	10.78.155.191
225	10.78.155.192/31	10.78.155.192 – 10.78.155.193	10.78.155.193
226	10.78.155.194/31	10.78.155.194 – 10.78.155.195	10.78.155.195
227	10.78.155.196/31	10.78.155.196 – 10.78.155.197	10.78.155.197
228	10.78.155.198/31	10.78.155.198 – 10.78.155.199	10.78.155.199
229	10.78.155.200/31	10.78.155.200 – 10.78.155.201	10.78.155.201
230	10.78.155.202/31	10.78.155.202 – 10.78.155.203	10.78.155.203
231	10.78.155.204/31	10.78.155.204 – 10.78.155.205	10.78.155.205
232	10.78.155.206/31	10.78.155.206 – 10.78.155.207	10.78.155.207
233	10.78.155.208/31	10.78.155.208 – 10.78.155.209	10.78.155.209
234	10.78.155.210/31	10.78.155.210 – 10.78.155.211	10.78.155.211
235	10.78.155.212/31	10.78.155.212 – 10.78.155.213	10.78.155.213
236	10.78.155.214/31	10.78.155.214 – 10.78.155.215	10.78.155.215
237	10.78.155.216/31	10.78.155.216 – 10.78.155.217	10.78.155.217
238	10.78.155.218/31	10.78.155.218 – 10.78.155.219	10.78.155.219
239	10.78.155.220/31	10.78.155.220 – 10.78.155.221	10.78.155.221
240	10.78.155.222/31	10.78.155.222 – 10.78.155.223	10.78.155.223
241	10.78.155.224/31	10.78.155.224 – 10.78.155.225	10.78.155.225
242	10.78.155.226/31	10.78.155.226 – 10.78.155.227	10.78.155.227
243	10.78.155.228/31	10.78.155.228 – 10.78.155.229	10.78.155.229
244	10.78.155.230/31	10.78.155.230 – 10.78.155.231	10.78.155.231
245	10.78.155.232/31	10.78.155.232 – 10.78.155.233	10.78.155.233
246	10.78.155.234/31	10.78.155.234 – 10.78.155.235	10.78.155.235
247	10.78.155.236/31	10.78.155.236 – 10.78.155.237	10.78.155.237
248	10.78.155.238/31	10.78.155.238 – 10.78.155.239	10.78.155.239
249	10.78.155.240/31	10.78.155.240 – 10.78.155.241	10.78.155.241
250	10.78.155.242/31	10.78.155.242 – 10.78.155.243	10.78.155.243
251	10.78.155.244/31	10.78.155.244 – 10.78.155.245	10.78.155.245
252	10.78.155.246/31	10.78.155.246 – 10.78.155.247	10.78.155.247
253	10.78.155.248/31	10.78.155.248 – 10.78.155.249	10.78.155.249
254	10.78.155.250/31	10.78.155.250 – 10.78.155.251	10.78.155.251
255	10.78.155.252/31	10.78.155.252 – 10.78.155.253	10.78.155.253
256	10.78.155.254/31	10.78.155.254 – 10.78.155.255	10.78.155.255

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 →