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)10.2.62.0/23

network10.2.62.0/23

broadcast10.2.63.255

first host10.2.62.1

last host10.2.63.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.62.0/23

address00001010.00000010.00111110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.00111110.00000000

broadcast00001010.00000010.00111111.11111111

green = network part, grey = host part

hex0x0a023e00

decimal167919104

reverse dns0.62.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:3e00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.62.0/31	10.2.62.0 – 10.2.62.1	10.2.62.1
2	10.2.62.2/31	10.2.62.2 – 10.2.62.3	10.2.62.3
3	10.2.62.4/31	10.2.62.4 – 10.2.62.5	10.2.62.5
4	10.2.62.6/31	10.2.62.6 – 10.2.62.7	10.2.62.7
5	10.2.62.8/31	10.2.62.8 – 10.2.62.9	10.2.62.9
6	10.2.62.10/31	10.2.62.10 – 10.2.62.11	10.2.62.11
7	10.2.62.12/31	10.2.62.12 – 10.2.62.13	10.2.62.13
8	10.2.62.14/31	10.2.62.14 – 10.2.62.15	10.2.62.15
9	10.2.62.16/31	10.2.62.16 – 10.2.62.17	10.2.62.17
10	10.2.62.18/31	10.2.62.18 – 10.2.62.19	10.2.62.19
11	10.2.62.20/31	10.2.62.20 – 10.2.62.21	10.2.62.21
12	10.2.62.22/31	10.2.62.22 – 10.2.62.23	10.2.62.23
13	10.2.62.24/31	10.2.62.24 – 10.2.62.25	10.2.62.25
14	10.2.62.26/31	10.2.62.26 – 10.2.62.27	10.2.62.27
15	10.2.62.28/31	10.2.62.28 – 10.2.62.29	10.2.62.29
16	10.2.62.30/31	10.2.62.30 – 10.2.62.31	10.2.62.31
17	10.2.62.32/31	10.2.62.32 – 10.2.62.33	10.2.62.33
18	10.2.62.34/31	10.2.62.34 – 10.2.62.35	10.2.62.35
19	10.2.62.36/31	10.2.62.36 – 10.2.62.37	10.2.62.37
20	10.2.62.38/31	10.2.62.38 – 10.2.62.39	10.2.62.39
21	10.2.62.40/31	10.2.62.40 – 10.2.62.41	10.2.62.41
22	10.2.62.42/31	10.2.62.42 – 10.2.62.43	10.2.62.43
23	10.2.62.44/31	10.2.62.44 – 10.2.62.45	10.2.62.45
24	10.2.62.46/31	10.2.62.46 – 10.2.62.47	10.2.62.47
25	10.2.62.48/31	10.2.62.48 – 10.2.62.49	10.2.62.49
26	10.2.62.50/31	10.2.62.50 – 10.2.62.51	10.2.62.51
27	10.2.62.52/31	10.2.62.52 – 10.2.62.53	10.2.62.53
28	10.2.62.54/31	10.2.62.54 – 10.2.62.55	10.2.62.55
29	10.2.62.56/31	10.2.62.56 – 10.2.62.57	10.2.62.57
30	10.2.62.58/31	10.2.62.58 – 10.2.62.59	10.2.62.59
31	10.2.62.60/31	10.2.62.60 – 10.2.62.61	10.2.62.61
32	10.2.62.62/31	10.2.62.62 – 10.2.62.63	10.2.62.63
33	10.2.62.64/31	10.2.62.64 – 10.2.62.65	10.2.62.65
34	10.2.62.66/31	10.2.62.66 – 10.2.62.67	10.2.62.67
35	10.2.62.68/31	10.2.62.68 – 10.2.62.69	10.2.62.69
36	10.2.62.70/31	10.2.62.70 – 10.2.62.71	10.2.62.71
37	10.2.62.72/31	10.2.62.72 – 10.2.62.73	10.2.62.73
38	10.2.62.74/31	10.2.62.74 – 10.2.62.75	10.2.62.75
39	10.2.62.76/31	10.2.62.76 – 10.2.62.77	10.2.62.77
40	10.2.62.78/31	10.2.62.78 – 10.2.62.79	10.2.62.79
41	10.2.62.80/31	10.2.62.80 – 10.2.62.81	10.2.62.81
42	10.2.62.82/31	10.2.62.82 – 10.2.62.83	10.2.62.83
43	10.2.62.84/31	10.2.62.84 – 10.2.62.85	10.2.62.85
44	10.2.62.86/31	10.2.62.86 – 10.2.62.87	10.2.62.87
45	10.2.62.88/31	10.2.62.88 – 10.2.62.89	10.2.62.89
46	10.2.62.90/31	10.2.62.90 – 10.2.62.91	10.2.62.91
47	10.2.62.92/31	10.2.62.92 – 10.2.62.93	10.2.62.93
48	10.2.62.94/31	10.2.62.94 – 10.2.62.95	10.2.62.95
49	10.2.62.96/31	10.2.62.96 – 10.2.62.97	10.2.62.97
50	10.2.62.98/31	10.2.62.98 – 10.2.62.99	10.2.62.99
51	10.2.62.100/31	10.2.62.100 – 10.2.62.101	10.2.62.101
52	10.2.62.102/31	10.2.62.102 – 10.2.62.103	10.2.62.103
53	10.2.62.104/31	10.2.62.104 – 10.2.62.105	10.2.62.105
54	10.2.62.106/31	10.2.62.106 – 10.2.62.107	10.2.62.107
55	10.2.62.108/31	10.2.62.108 – 10.2.62.109	10.2.62.109
56	10.2.62.110/31	10.2.62.110 – 10.2.62.111	10.2.62.111
57	10.2.62.112/31	10.2.62.112 – 10.2.62.113	10.2.62.113
58	10.2.62.114/31	10.2.62.114 – 10.2.62.115	10.2.62.115
59	10.2.62.116/31	10.2.62.116 – 10.2.62.117	10.2.62.117
60	10.2.62.118/31	10.2.62.118 – 10.2.62.119	10.2.62.119
61	10.2.62.120/31	10.2.62.120 – 10.2.62.121	10.2.62.121
62	10.2.62.122/31	10.2.62.122 – 10.2.62.123	10.2.62.123
63	10.2.62.124/31	10.2.62.124 – 10.2.62.125	10.2.62.125
64	10.2.62.126/31	10.2.62.126 – 10.2.62.127	10.2.62.127
65	10.2.62.128/31	10.2.62.128 – 10.2.62.129	10.2.62.129
66	10.2.62.130/31	10.2.62.130 – 10.2.62.131	10.2.62.131
67	10.2.62.132/31	10.2.62.132 – 10.2.62.133	10.2.62.133
68	10.2.62.134/31	10.2.62.134 – 10.2.62.135	10.2.62.135
69	10.2.62.136/31	10.2.62.136 – 10.2.62.137	10.2.62.137
70	10.2.62.138/31	10.2.62.138 – 10.2.62.139	10.2.62.139
71	10.2.62.140/31	10.2.62.140 – 10.2.62.141	10.2.62.141
72	10.2.62.142/31	10.2.62.142 – 10.2.62.143	10.2.62.143
73	10.2.62.144/31	10.2.62.144 – 10.2.62.145	10.2.62.145
74	10.2.62.146/31	10.2.62.146 – 10.2.62.147	10.2.62.147
75	10.2.62.148/31	10.2.62.148 – 10.2.62.149	10.2.62.149
76	10.2.62.150/31	10.2.62.150 – 10.2.62.151	10.2.62.151
77	10.2.62.152/31	10.2.62.152 – 10.2.62.153	10.2.62.153
78	10.2.62.154/31	10.2.62.154 – 10.2.62.155	10.2.62.155
79	10.2.62.156/31	10.2.62.156 – 10.2.62.157	10.2.62.157
80	10.2.62.158/31	10.2.62.158 – 10.2.62.159	10.2.62.159
81	10.2.62.160/31	10.2.62.160 – 10.2.62.161	10.2.62.161
82	10.2.62.162/31	10.2.62.162 – 10.2.62.163	10.2.62.163
83	10.2.62.164/31	10.2.62.164 – 10.2.62.165	10.2.62.165
84	10.2.62.166/31	10.2.62.166 – 10.2.62.167	10.2.62.167
85	10.2.62.168/31	10.2.62.168 – 10.2.62.169	10.2.62.169
86	10.2.62.170/31	10.2.62.170 – 10.2.62.171	10.2.62.171
87	10.2.62.172/31	10.2.62.172 – 10.2.62.173	10.2.62.173
88	10.2.62.174/31	10.2.62.174 – 10.2.62.175	10.2.62.175
89	10.2.62.176/31	10.2.62.176 – 10.2.62.177	10.2.62.177
90	10.2.62.178/31	10.2.62.178 – 10.2.62.179	10.2.62.179
91	10.2.62.180/31	10.2.62.180 – 10.2.62.181	10.2.62.181
92	10.2.62.182/31	10.2.62.182 – 10.2.62.183	10.2.62.183
93	10.2.62.184/31	10.2.62.184 – 10.2.62.185	10.2.62.185
94	10.2.62.186/31	10.2.62.186 – 10.2.62.187	10.2.62.187
95	10.2.62.188/31	10.2.62.188 – 10.2.62.189	10.2.62.189
96	10.2.62.190/31	10.2.62.190 – 10.2.62.191	10.2.62.191
97	10.2.62.192/31	10.2.62.192 – 10.2.62.193	10.2.62.193
98	10.2.62.194/31	10.2.62.194 – 10.2.62.195	10.2.62.195
99	10.2.62.196/31	10.2.62.196 – 10.2.62.197	10.2.62.197
100	10.2.62.198/31	10.2.62.198 – 10.2.62.199	10.2.62.199
101	10.2.62.200/31	10.2.62.200 – 10.2.62.201	10.2.62.201
102	10.2.62.202/31	10.2.62.202 – 10.2.62.203	10.2.62.203
103	10.2.62.204/31	10.2.62.204 – 10.2.62.205	10.2.62.205
104	10.2.62.206/31	10.2.62.206 – 10.2.62.207	10.2.62.207
105	10.2.62.208/31	10.2.62.208 – 10.2.62.209	10.2.62.209
106	10.2.62.210/31	10.2.62.210 – 10.2.62.211	10.2.62.211
107	10.2.62.212/31	10.2.62.212 – 10.2.62.213	10.2.62.213
108	10.2.62.214/31	10.2.62.214 – 10.2.62.215	10.2.62.215
109	10.2.62.216/31	10.2.62.216 – 10.2.62.217	10.2.62.217
110	10.2.62.218/31	10.2.62.218 – 10.2.62.219	10.2.62.219
111	10.2.62.220/31	10.2.62.220 – 10.2.62.221	10.2.62.221
112	10.2.62.222/31	10.2.62.222 – 10.2.62.223	10.2.62.223
113	10.2.62.224/31	10.2.62.224 – 10.2.62.225	10.2.62.225
114	10.2.62.226/31	10.2.62.226 – 10.2.62.227	10.2.62.227
115	10.2.62.228/31	10.2.62.228 – 10.2.62.229	10.2.62.229
116	10.2.62.230/31	10.2.62.230 – 10.2.62.231	10.2.62.231
117	10.2.62.232/31	10.2.62.232 – 10.2.62.233	10.2.62.233
118	10.2.62.234/31	10.2.62.234 – 10.2.62.235	10.2.62.235
119	10.2.62.236/31	10.2.62.236 – 10.2.62.237	10.2.62.237
120	10.2.62.238/31	10.2.62.238 – 10.2.62.239	10.2.62.239
121	10.2.62.240/31	10.2.62.240 – 10.2.62.241	10.2.62.241
122	10.2.62.242/31	10.2.62.242 – 10.2.62.243	10.2.62.243
123	10.2.62.244/31	10.2.62.244 – 10.2.62.245	10.2.62.245
124	10.2.62.246/31	10.2.62.246 – 10.2.62.247	10.2.62.247
125	10.2.62.248/31	10.2.62.248 – 10.2.62.249	10.2.62.249
126	10.2.62.250/31	10.2.62.250 – 10.2.62.251	10.2.62.251
127	10.2.62.252/31	10.2.62.252 – 10.2.62.253	10.2.62.253
128	10.2.62.254/31	10.2.62.254 – 10.2.62.255	10.2.62.255
129	10.2.63.0/31	10.2.63.0 – 10.2.63.1	10.2.63.1
130	10.2.63.2/31	10.2.63.2 – 10.2.63.3	10.2.63.3
131	10.2.63.4/31	10.2.63.4 – 10.2.63.5	10.2.63.5
132	10.2.63.6/31	10.2.63.6 – 10.2.63.7	10.2.63.7
133	10.2.63.8/31	10.2.63.8 – 10.2.63.9	10.2.63.9
134	10.2.63.10/31	10.2.63.10 – 10.2.63.11	10.2.63.11
135	10.2.63.12/31	10.2.63.12 – 10.2.63.13	10.2.63.13
136	10.2.63.14/31	10.2.63.14 – 10.2.63.15	10.2.63.15
137	10.2.63.16/31	10.2.63.16 – 10.2.63.17	10.2.63.17
138	10.2.63.18/31	10.2.63.18 – 10.2.63.19	10.2.63.19
139	10.2.63.20/31	10.2.63.20 – 10.2.63.21	10.2.63.21
140	10.2.63.22/31	10.2.63.22 – 10.2.63.23	10.2.63.23
141	10.2.63.24/31	10.2.63.24 – 10.2.63.25	10.2.63.25
142	10.2.63.26/31	10.2.63.26 – 10.2.63.27	10.2.63.27
143	10.2.63.28/31	10.2.63.28 – 10.2.63.29	10.2.63.29
144	10.2.63.30/31	10.2.63.30 – 10.2.63.31	10.2.63.31
145	10.2.63.32/31	10.2.63.32 – 10.2.63.33	10.2.63.33
146	10.2.63.34/31	10.2.63.34 – 10.2.63.35	10.2.63.35
147	10.2.63.36/31	10.2.63.36 – 10.2.63.37	10.2.63.37
148	10.2.63.38/31	10.2.63.38 – 10.2.63.39	10.2.63.39
149	10.2.63.40/31	10.2.63.40 – 10.2.63.41	10.2.63.41
150	10.2.63.42/31	10.2.63.42 – 10.2.63.43	10.2.63.43
151	10.2.63.44/31	10.2.63.44 – 10.2.63.45	10.2.63.45
152	10.2.63.46/31	10.2.63.46 – 10.2.63.47	10.2.63.47
153	10.2.63.48/31	10.2.63.48 – 10.2.63.49	10.2.63.49
154	10.2.63.50/31	10.2.63.50 – 10.2.63.51	10.2.63.51
155	10.2.63.52/31	10.2.63.52 – 10.2.63.53	10.2.63.53
156	10.2.63.54/31	10.2.63.54 – 10.2.63.55	10.2.63.55
157	10.2.63.56/31	10.2.63.56 – 10.2.63.57	10.2.63.57
158	10.2.63.58/31	10.2.63.58 – 10.2.63.59	10.2.63.59
159	10.2.63.60/31	10.2.63.60 – 10.2.63.61	10.2.63.61
160	10.2.63.62/31	10.2.63.62 – 10.2.63.63	10.2.63.63
161	10.2.63.64/31	10.2.63.64 – 10.2.63.65	10.2.63.65
162	10.2.63.66/31	10.2.63.66 – 10.2.63.67	10.2.63.67
163	10.2.63.68/31	10.2.63.68 – 10.2.63.69	10.2.63.69
164	10.2.63.70/31	10.2.63.70 – 10.2.63.71	10.2.63.71
165	10.2.63.72/31	10.2.63.72 – 10.2.63.73	10.2.63.73
166	10.2.63.74/31	10.2.63.74 – 10.2.63.75	10.2.63.75
167	10.2.63.76/31	10.2.63.76 – 10.2.63.77	10.2.63.77
168	10.2.63.78/31	10.2.63.78 – 10.2.63.79	10.2.63.79
169	10.2.63.80/31	10.2.63.80 – 10.2.63.81	10.2.63.81
170	10.2.63.82/31	10.2.63.82 – 10.2.63.83	10.2.63.83
171	10.2.63.84/31	10.2.63.84 – 10.2.63.85	10.2.63.85
172	10.2.63.86/31	10.2.63.86 – 10.2.63.87	10.2.63.87
173	10.2.63.88/31	10.2.63.88 – 10.2.63.89	10.2.63.89
174	10.2.63.90/31	10.2.63.90 – 10.2.63.91	10.2.63.91
175	10.2.63.92/31	10.2.63.92 – 10.2.63.93	10.2.63.93
176	10.2.63.94/31	10.2.63.94 – 10.2.63.95	10.2.63.95
177	10.2.63.96/31	10.2.63.96 – 10.2.63.97	10.2.63.97
178	10.2.63.98/31	10.2.63.98 – 10.2.63.99	10.2.63.99
179	10.2.63.100/31	10.2.63.100 – 10.2.63.101	10.2.63.101
180	10.2.63.102/31	10.2.63.102 – 10.2.63.103	10.2.63.103
181	10.2.63.104/31	10.2.63.104 – 10.2.63.105	10.2.63.105
182	10.2.63.106/31	10.2.63.106 – 10.2.63.107	10.2.63.107
183	10.2.63.108/31	10.2.63.108 – 10.2.63.109	10.2.63.109
184	10.2.63.110/31	10.2.63.110 – 10.2.63.111	10.2.63.111
185	10.2.63.112/31	10.2.63.112 – 10.2.63.113	10.2.63.113
186	10.2.63.114/31	10.2.63.114 – 10.2.63.115	10.2.63.115
187	10.2.63.116/31	10.2.63.116 – 10.2.63.117	10.2.63.117
188	10.2.63.118/31	10.2.63.118 – 10.2.63.119	10.2.63.119
189	10.2.63.120/31	10.2.63.120 – 10.2.63.121	10.2.63.121
190	10.2.63.122/31	10.2.63.122 – 10.2.63.123	10.2.63.123
191	10.2.63.124/31	10.2.63.124 – 10.2.63.125	10.2.63.125
192	10.2.63.126/31	10.2.63.126 – 10.2.63.127	10.2.63.127
193	10.2.63.128/31	10.2.63.128 – 10.2.63.129	10.2.63.129
194	10.2.63.130/31	10.2.63.130 – 10.2.63.131	10.2.63.131
195	10.2.63.132/31	10.2.63.132 – 10.2.63.133	10.2.63.133
196	10.2.63.134/31	10.2.63.134 – 10.2.63.135	10.2.63.135
197	10.2.63.136/31	10.2.63.136 – 10.2.63.137	10.2.63.137
198	10.2.63.138/31	10.2.63.138 – 10.2.63.139	10.2.63.139
199	10.2.63.140/31	10.2.63.140 – 10.2.63.141	10.2.63.141
200	10.2.63.142/31	10.2.63.142 – 10.2.63.143	10.2.63.143
201	10.2.63.144/31	10.2.63.144 – 10.2.63.145	10.2.63.145
202	10.2.63.146/31	10.2.63.146 – 10.2.63.147	10.2.63.147
203	10.2.63.148/31	10.2.63.148 – 10.2.63.149	10.2.63.149
204	10.2.63.150/31	10.2.63.150 – 10.2.63.151	10.2.63.151
205	10.2.63.152/31	10.2.63.152 – 10.2.63.153	10.2.63.153
206	10.2.63.154/31	10.2.63.154 – 10.2.63.155	10.2.63.155
207	10.2.63.156/31	10.2.63.156 – 10.2.63.157	10.2.63.157
208	10.2.63.158/31	10.2.63.158 – 10.2.63.159	10.2.63.159
209	10.2.63.160/31	10.2.63.160 – 10.2.63.161	10.2.63.161
210	10.2.63.162/31	10.2.63.162 – 10.2.63.163	10.2.63.163
211	10.2.63.164/31	10.2.63.164 – 10.2.63.165	10.2.63.165
212	10.2.63.166/31	10.2.63.166 – 10.2.63.167	10.2.63.167
213	10.2.63.168/31	10.2.63.168 – 10.2.63.169	10.2.63.169
214	10.2.63.170/31	10.2.63.170 – 10.2.63.171	10.2.63.171
215	10.2.63.172/31	10.2.63.172 – 10.2.63.173	10.2.63.173
216	10.2.63.174/31	10.2.63.174 – 10.2.63.175	10.2.63.175
217	10.2.63.176/31	10.2.63.176 – 10.2.63.177	10.2.63.177
218	10.2.63.178/31	10.2.63.178 – 10.2.63.179	10.2.63.179
219	10.2.63.180/31	10.2.63.180 – 10.2.63.181	10.2.63.181
220	10.2.63.182/31	10.2.63.182 – 10.2.63.183	10.2.63.183
221	10.2.63.184/31	10.2.63.184 – 10.2.63.185	10.2.63.185
222	10.2.63.186/31	10.2.63.186 – 10.2.63.187	10.2.63.187
223	10.2.63.188/31	10.2.63.188 – 10.2.63.189	10.2.63.189
224	10.2.63.190/31	10.2.63.190 – 10.2.63.191	10.2.63.191
225	10.2.63.192/31	10.2.63.192 – 10.2.63.193	10.2.63.193
226	10.2.63.194/31	10.2.63.194 – 10.2.63.195	10.2.63.195
227	10.2.63.196/31	10.2.63.196 – 10.2.63.197	10.2.63.197
228	10.2.63.198/31	10.2.63.198 – 10.2.63.199	10.2.63.199
229	10.2.63.200/31	10.2.63.200 – 10.2.63.201	10.2.63.201
230	10.2.63.202/31	10.2.63.202 – 10.2.63.203	10.2.63.203
231	10.2.63.204/31	10.2.63.204 – 10.2.63.205	10.2.63.205
232	10.2.63.206/31	10.2.63.206 – 10.2.63.207	10.2.63.207
233	10.2.63.208/31	10.2.63.208 – 10.2.63.209	10.2.63.209
234	10.2.63.210/31	10.2.63.210 – 10.2.63.211	10.2.63.211
235	10.2.63.212/31	10.2.63.212 – 10.2.63.213	10.2.63.213
236	10.2.63.214/31	10.2.63.214 – 10.2.63.215	10.2.63.215
237	10.2.63.216/31	10.2.63.216 – 10.2.63.217	10.2.63.217
238	10.2.63.218/31	10.2.63.218 – 10.2.63.219	10.2.63.219
239	10.2.63.220/31	10.2.63.220 – 10.2.63.221	10.2.63.221
240	10.2.63.222/31	10.2.63.222 – 10.2.63.223	10.2.63.223
241	10.2.63.224/31	10.2.63.224 – 10.2.63.225	10.2.63.225
242	10.2.63.226/31	10.2.63.226 – 10.2.63.227	10.2.63.227
243	10.2.63.228/31	10.2.63.228 – 10.2.63.229	10.2.63.229
244	10.2.63.230/31	10.2.63.230 – 10.2.63.231	10.2.63.231
245	10.2.63.232/31	10.2.63.232 – 10.2.63.233	10.2.63.233
246	10.2.63.234/31	10.2.63.234 – 10.2.63.235	10.2.63.235
247	10.2.63.236/31	10.2.63.236 – 10.2.63.237	10.2.63.237
248	10.2.63.238/31	10.2.63.238 – 10.2.63.239	10.2.63.239
249	10.2.63.240/31	10.2.63.240 – 10.2.63.241	10.2.63.241
250	10.2.63.242/31	10.2.63.242 – 10.2.63.243	10.2.63.243
251	10.2.63.244/31	10.2.63.244 – 10.2.63.245	10.2.63.245
252	10.2.63.246/31	10.2.63.246 – 10.2.63.247	10.2.63.247
253	10.2.63.248/31	10.2.63.248 – 10.2.63.249	10.2.63.249
254	10.2.63.250/31	10.2.63.250 – 10.2.63.251	10.2.63.251
255	10.2.63.252/31	10.2.63.252 – 10.2.63.253	10.2.63.253
256	10.2.63.254/31	10.2.63.254 – 10.2.63.255	10.2.63.255

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 →