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)10.2.58.0/23

network10.2.58.0/23

broadcast10.2.59.255

first host10.2.58.1

last host10.2.59.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.58.0/23

address00001010.00000010.00111010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.00111010.00000000

broadcast00001010.00000010.00111011.11111111

green = network part, grey = host part

hex0x0a023a00

decimal167918080

reverse dns0.58.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:3a00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.58.0/31	10.2.58.0 – 10.2.58.1	10.2.58.1
2	10.2.58.2/31	10.2.58.2 – 10.2.58.3	10.2.58.3
3	10.2.58.4/31	10.2.58.4 – 10.2.58.5	10.2.58.5
4	10.2.58.6/31	10.2.58.6 – 10.2.58.7	10.2.58.7
5	10.2.58.8/31	10.2.58.8 – 10.2.58.9	10.2.58.9
6	10.2.58.10/31	10.2.58.10 – 10.2.58.11	10.2.58.11
7	10.2.58.12/31	10.2.58.12 – 10.2.58.13	10.2.58.13
8	10.2.58.14/31	10.2.58.14 – 10.2.58.15	10.2.58.15
9	10.2.58.16/31	10.2.58.16 – 10.2.58.17	10.2.58.17
10	10.2.58.18/31	10.2.58.18 – 10.2.58.19	10.2.58.19
11	10.2.58.20/31	10.2.58.20 – 10.2.58.21	10.2.58.21
12	10.2.58.22/31	10.2.58.22 – 10.2.58.23	10.2.58.23
13	10.2.58.24/31	10.2.58.24 – 10.2.58.25	10.2.58.25
14	10.2.58.26/31	10.2.58.26 – 10.2.58.27	10.2.58.27
15	10.2.58.28/31	10.2.58.28 – 10.2.58.29	10.2.58.29
16	10.2.58.30/31	10.2.58.30 – 10.2.58.31	10.2.58.31
17	10.2.58.32/31	10.2.58.32 – 10.2.58.33	10.2.58.33
18	10.2.58.34/31	10.2.58.34 – 10.2.58.35	10.2.58.35
19	10.2.58.36/31	10.2.58.36 – 10.2.58.37	10.2.58.37
20	10.2.58.38/31	10.2.58.38 – 10.2.58.39	10.2.58.39
21	10.2.58.40/31	10.2.58.40 – 10.2.58.41	10.2.58.41
22	10.2.58.42/31	10.2.58.42 – 10.2.58.43	10.2.58.43
23	10.2.58.44/31	10.2.58.44 – 10.2.58.45	10.2.58.45
24	10.2.58.46/31	10.2.58.46 – 10.2.58.47	10.2.58.47
25	10.2.58.48/31	10.2.58.48 – 10.2.58.49	10.2.58.49
26	10.2.58.50/31	10.2.58.50 – 10.2.58.51	10.2.58.51
27	10.2.58.52/31	10.2.58.52 – 10.2.58.53	10.2.58.53
28	10.2.58.54/31	10.2.58.54 – 10.2.58.55	10.2.58.55
29	10.2.58.56/31	10.2.58.56 – 10.2.58.57	10.2.58.57
30	10.2.58.58/31	10.2.58.58 – 10.2.58.59	10.2.58.59
31	10.2.58.60/31	10.2.58.60 – 10.2.58.61	10.2.58.61
32	10.2.58.62/31	10.2.58.62 – 10.2.58.63	10.2.58.63
33	10.2.58.64/31	10.2.58.64 – 10.2.58.65	10.2.58.65
34	10.2.58.66/31	10.2.58.66 – 10.2.58.67	10.2.58.67
35	10.2.58.68/31	10.2.58.68 – 10.2.58.69	10.2.58.69
36	10.2.58.70/31	10.2.58.70 – 10.2.58.71	10.2.58.71
37	10.2.58.72/31	10.2.58.72 – 10.2.58.73	10.2.58.73
38	10.2.58.74/31	10.2.58.74 – 10.2.58.75	10.2.58.75
39	10.2.58.76/31	10.2.58.76 – 10.2.58.77	10.2.58.77
40	10.2.58.78/31	10.2.58.78 – 10.2.58.79	10.2.58.79
41	10.2.58.80/31	10.2.58.80 – 10.2.58.81	10.2.58.81
42	10.2.58.82/31	10.2.58.82 – 10.2.58.83	10.2.58.83
43	10.2.58.84/31	10.2.58.84 – 10.2.58.85	10.2.58.85
44	10.2.58.86/31	10.2.58.86 – 10.2.58.87	10.2.58.87
45	10.2.58.88/31	10.2.58.88 – 10.2.58.89	10.2.58.89
46	10.2.58.90/31	10.2.58.90 – 10.2.58.91	10.2.58.91
47	10.2.58.92/31	10.2.58.92 – 10.2.58.93	10.2.58.93
48	10.2.58.94/31	10.2.58.94 – 10.2.58.95	10.2.58.95
49	10.2.58.96/31	10.2.58.96 – 10.2.58.97	10.2.58.97
50	10.2.58.98/31	10.2.58.98 – 10.2.58.99	10.2.58.99
51	10.2.58.100/31	10.2.58.100 – 10.2.58.101	10.2.58.101
52	10.2.58.102/31	10.2.58.102 – 10.2.58.103	10.2.58.103
53	10.2.58.104/31	10.2.58.104 – 10.2.58.105	10.2.58.105
54	10.2.58.106/31	10.2.58.106 – 10.2.58.107	10.2.58.107
55	10.2.58.108/31	10.2.58.108 – 10.2.58.109	10.2.58.109
56	10.2.58.110/31	10.2.58.110 – 10.2.58.111	10.2.58.111
57	10.2.58.112/31	10.2.58.112 – 10.2.58.113	10.2.58.113
58	10.2.58.114/31	10.2.58.114 – 10.2.58.115	10.2.58.115
59	10.2.58.116/31	10.2.58.116 – 10.2.58.117	10.2.58.117
60	10.2.58.118/31	10.2.58.118 – 10.2.58.119	10.2.58.119
61	10.2.58.120/31	10.2.58.120 – 10.2.58.121	10.2.58.121
62	10.2.58.122/31	10.2.58.122 – 10.2.58.123	10.2.58.123
63	10.2.58.124/31	10.2.58.124 – 10.2.58.125	10.2.58.125
64	10.2.58.126/31	10.2.58.126 – 10.2.58.127	10.2.58.127
65	10.2.58.128/31	10.2.58.128 – 10.2.58.129	10.2.58.129
66	10.2.58.130/31	10.2.58.130 – 10.2.58.131	10.2.58.131
67	10.2.58.132/31	10.2.58.132 – 10.2.58.133	10.2.58.133
68	10.2.58.134/31	10.2.58.134 – 10.2.58.135	10.2.58.135
69	10.2.58.136/31	10.2.58.136 – 10.2.58.137	10.2.58.137
70	10.2.58.138/31	10.2.58.138 – 10.2.58.139	10.2.58.139
71	10.2.58.140/31	10.2.58.140 – 10.2.58.141	10.2.58.141
72	10.2.58.142/31	10.2.58.142 – 10.2.58.143	10.2.58.143
73	10.2.58.144/31	10.2.58.144 – 10.2.58.145	10.2.58.145
74	10.2.58.146/31	10.2.58.146 – 10.2.58.147	10.2.58.147
75	10.2.58.148/31	10.2.58.148 – 10.2.58.149	10.2.58.149
76	10.2.58.150/31	10.2.58.150 – 10.2.58.151	10.2.58.151
77	10.2.58.152/31	10.2.58.152 – 10.2.58.153	10.2.58.153
78	10.2.58.154/31	10.2.58.154 – 10.2.58.155	10.2.58.155
79	10.2.58.156/31	10.2.58.156 – 10.2.58.157	10.2.58.157
80	10.2.58.158/31	10.2.58.158 – 10.2.58.159	10.2.58.159
81	10.2.58.160/31	10.2.58.160 – 10.2.58.161	10.2.58.161
82	10.2.58.162/31	10.2.58.162 – 10.2.58.163	10.2.58.163
83	10.2.58.164/31	10.2.58.164 – 10.2.58.165	10.2.58.165
84	10.2.58.166/31	10.2.58.166 – 10.2.58.167	10.2.58.167
85	10.2.58.168/31	10.2.58.168 – 10.2.58.169	10.2.58.169
86	10.2.58.170/31	10.2.58.170 – 10.2.58.171	10.2.58.171
87	10.2.58.172/31	10.2.58.172 – 10.2.58.173	10.2.58.173
88	10.2.58.174/31	10.2.58.174 – 10.2.58.175	10.2.58.175
89	10.2.58.176/31	10.2.58.176 – 10.2.58.177	10.2.58.177
90	10.2.58.178/31	10.2.58.178 – 10.2.58.179	10.2.58.179
91	10.2.58.180/31	10.2.58.180 – 10.2.58.181	10.2.58.181
92	10.2.58.182/31	10.2.58.182 – 10.2.58.183	10.2.58.183
93	10.2.58.184/31	10.2.58.184 – 10.2.58.185	10.2.58.185
94	10.2.58.186/31	10.2.58.186 – 10.2.58.187	10.2.58.187
95	10.2.58.188/31	10.2.58.188 – 10.2.58.189	10.2.58.189
96	10.2.58.190/31	10.2.58.190 – 10.2.58.191	10.2.58.191
97	10.2.58.192/31	10.2.58.192 – 10.2.58.193	10.2.58.193
98	10.2.58.194/31	10.2.58.194 – 10.2.58.195	10.2.58.195
99	10.2.58.196/31	10.2.58.196 – 10.2.58.197	10.2.58.197
100	10.2.58.198/31	10.2.58.198 – 10.2.58.199	10.2.58.199
101	10.2.58.200/31	10.2.58.200 – 10.2.58.201	10.2.58.201
102	10.2.58.202/31	10.2.58.202 – 10.2.58.203	10.2.58.203
103	10.2.58.204/31	10.2.58.204 – 10.2.58.205	10.2.58.205
104	10.2.58.206/31	10.2.58.206 – 10.2.58.207	10.2.58.207
105	10.2.58.208/31	10.2.58.208 – 10.2.58.209	10.2.58.209
106	10.2.58.210/31	10.2.58.210 – 10.2.58.211	10.2.58.211
107	10.2.58.212/31	10.2.58.212 – 10.2.58.213	10.2.58.213
108	10.2.58.214/31	10.2.58.214 – 10.2.58.215	10.2.58.215
109	10.2.58.216/31	10.2.58.216 – 10.2.58.217	10.2.58.217
110	10.2.58.218/31	10.2.58.218 – 10.2.58.219	10.2.58.219
111	10.2.58.220/31	10.2.58.220 – 10.2.58.221	10.2.58.221
112	10.2.58.222/31	10.2.58.222 – 10.2.58.223	10.2.58.223
113	10.2.58.224/31	10.2.58.224 – 10.2.58.225	10.2.58.225
114	10.2.58.226/31	10.2.58.226 – 10.2.58.227	10.2.58.227
115	10.2.58.228/31	10.2.58.228 – 10.2.58.229	10.2.58.229
116	10.2.58.230/31	10.2.58.230 – 10.2.58.231	10.2.58.231
117	10.2.58.232/31	10.2.58.232 – 10.2.58.233	10.2.58.233
118	10.2.58.234/31	10.2.58.234 – 10.2.58.235	10.2.58.235
119	10.2.58.236/31	10.2.58.236 – 10.2.58.237	10.2.58.237
120	10.2.58.238/31	10.2.58.238 – 10.2.58.239	10.2.58.239
121	10.2.58.240/31	10.2.58.240 – 10.2.58.241	10.2.58.241
122	10.2.58.242/31	10.2.58.242 – 10.2.58.243	10.2.58.243
123	10.2.58.244/31	10.2.58.244 – 10.2.58.245	10.2.58.245
124	10.2.58.246/31	10.2.58.246 – 10.2.58.247	10.2.58.247
125	10.2.58.248/31	10.2.58.248 – 10.2.58.249	10.2.58.249
126	10.2.58.250/31	10.2.58.250 – 10.2.58.251	10.2.58.251
127	10.2.58.252/31	10.2.58.252 – 10.2.58.253	10.2.58.253
128	10.2.58.254/31	10.2.58.254 – 10.2.58.255	10.2.58.255
129	10.2.59.0/31	10.2.59.0 – 10.2.59.1	10.2.59.1
130	10.2.59.2/31	10.2.59.2 – 10.2.59.3	10.2.59.3
131	10.2.59.4/31	10.2.59.4 – 10.2.59.5	10.2.59.5
132	10.2.59.6/31	10.2.59.6 – 10.2.59.7	10.2.59.7
133	10.2.59.8/31	10.2.59.8 – 10.2.59.9	10.2.59.9
134	10.2.59.10/31	10.2.59.10 – 10.2.59.11	10.2.59.11
135	10.2.59.12/31	10.2.59.12 – 10.2.59.13	10.2.59.13
136	10.2.59.14/31	10.2.59.14 – 10.2.59.15	10.2.59.15
137	10.2.59.16/31	10.2.59.16 – 10.2.59.17	10.2.59.17
138	10.2.59.18/31	10.2.59.18 – 10.2.59.19	10.2.59.19
139	10.2.59.20/31	10.2.59.20 – 10.2.59.21	10.2.59.21
140	10.2.59.22/31	10.2.59.22 – 10.2.59.23	10.2.59.23
141	10.2.59.24/31	10.2.59.24 – 10.2.59.25	10.2.59.25
142	10.2.59.26/31	10.2.59.26 – 10.2.59.27	10.2.59.27
143	10.2.59.28/31	10.2.59.28 – 10.2.59.29	10.2.59.29
144	10.2.59.30/31	10.2.59.30 – 10.2.59.31	10.2.59.31
145	10.2.59.32/31	10.2.59.32 – 10.2.59.33	10.2.59.33
146	10.2.59.34/31	10.2.59.34 – 10.2.59.35	10.2.59.35
147	10.2.59.36/31	10.2.59.36 – 10.2.59.37	10.2.59.37
148	10.2.59.38/31	10.2.59.38 – 10.2.59.39	10.2.59.39
149	10.2.59.40/31	10.2.59.40 – 10.2.59.41	10.2.59.41
150	10.2.59.42/31	10.2.59.42 – 10.2.59.43	10.2.59.43
151	10.2.59.44/31	10.2.59.44 – 10.2.59.45	10.2.59.45
152	10.2.59.46/31	10.2.59.46 – 10.2.59.47	10.2.59.47
153	10.2.59.48/31	10.2.59.48 – 10.2.59.49	10.2.59.49
154	10.2.59.50/31	10.2.59.50 – 10.2.59.51	10.2.59.51
155	10.2.59.52/31	10.2.59.52 – 10.2.59.53	10.2.59.53
156	10.2.59.54/31	10.2.59.54 – 10.2.59.55	10.2.59.55
157	10.2.59.56/31	10.2.59.56 – 10.2.59.57	10.2.59.57
158	10.2.59.58/31	10.2.59.58 – 10.2.59.59	10.2.59.59
159	10.2.59.60/31	10.2.59.60 – 10.2.59.61	10.2.59.61
160	10.2.59.62/31	10.2.59.62 – 10.2.59.63	10.2.59.63
161	10.2.59.64/31	10.2.59.64 – 10.2.59.65	10.2.59.65
162	10.2.59.66/31	10.2.59.66 – 10.2.59.67	10.2.59.67
163	10.2.59.68/31	10.2.59.68 – 10.2.59.69	10.2.59.69
164	10.2.59.70/31	10.2.59.70 – 10.2.59.71	10.2.59.71
165	10.2.59.72/31	10.2.59.72 – 10.2.59.73	10.2.59.73
166	10.2.59.74/31	10.2.59.74 – 10.2.59.75	10.2.59.75
167	10.2.59.76/31	10.2.59.76 – 10.2.59.77	10.2.59.77
168	10.2.59.78/31	10.2.59.78 – 10.2.59.79	10.2.59.79
169	10.2.59.80/31	10.2.59.80 – 10.2.59.81	10.2.59.81
170	10.2.59.82/31	10.2.59.82 – 10.2.59.83	10.2.59.83
171	10.2.59.84/31	10.2.59.84 – 10.2.59.85	10.2.59.85
172	10.2.59.86/31	10.2.59.86 – 10.2.59.87	10.2.59.87
173	10.2.59.88/31	10.2.59.88 – 10.2.59.89	10.2.59.89
174	10.2.59.90/31	10.2.59.90 – 10.2.59.91	10.2.59.91
175	10.2.59.92/31	10.2.59.92 – 10.2.59.93	10.2.59.93
176	10.2.59.94/31	10.2.59.94 – 10.2.59.95	10.2.59.95
177	10.2.59.96/31	10.2.59.96 – 10.2.59.97	10.2.59.97
178	10.2.59.98/31	10.2.59.98 – 10.2.59.99	10.2.59.99
179	10.2.59.100/31	10.2.59.100 – 10.2.59.101	10.2.59.101
180	10.2.59.102/31	10.2.59.102 – 10.2.59.103	10.2.59.103
181	10.2.59.104/31	10.2.59.104 – 10.2.59.105	10.2.59.105
182	10.2.59.106/31	10.2.59.106 – 10.2.59.107	10.2.59.107
183	10.2.59.108/31	10.2.59.108 – 10.2.59.109	10.2.59.109
184	10.2.59.110/31	10.2.59.110 – 10.2.59.111	10.2.59.111
185	10.2.59.112/31	10.2.59.112 – 10.2.59.113	10.2.59.113
186	10.2.59.114/31	10.2.59.114 – 10.2.59.115	10.2.59.115
187	10.2.59.116/31	10.2.59.116 – 10.2.59.117	10.2.59.117
188	10.2.59.118/31	10.2.59.118 – 10.2.59.119	10.2.59.119
189	10.2.59.120/31	10.2.59.120 – 10.2.59.121	10.2.59.121
190	10.2.59.122/31	10.2.59.122 – 10.2.59.123	10.2.59.123
191	10.2.59.124/31	10.2.59.124 – 10.2.59.125	10.2.59.125
192	10.2.59.126/31	10.2.59.126 – 10.2.59.127	10.2.59.127
193	10.2.59.128/31	10.2.59.128 – 10.2.59.129	10.2.59.129
194	10.2.59.130/31	10.2.59.130 – 10.2.59.131	10.2.59.131
195	10.2.59.132/31	10.2.59.132 – 10.2.59.133	10.2.59.133
196	10.2.59.134/31	10.2.59.134 – 10.2.59.135	10.2.59.135
197	10.2.59.136/31	10.2.59.136 – 10.2.59.137	10.2.59.137
198	10.2.59.138/31	10.2.59.138 – 10.2.59.139	10.2.59.139
199	10.2.59.140/31	10.2.59.140 – 10.2.59.141	10.2.59.141
200	10.2.59.142/31	10.2.59.142 – 10.2.59.143	10.2.59.143
201	10.2.59.144/31	10.2.59.144 – 10.2.59.145	10.2.59.145
202	10.2.59.146/31	10.2.59.146 – 10.2.59.147	10.2.59.147
203	10.2.59.148/31	10.2.59.148 – 10.2.59.149	10.2.59.149
204	10.2.59.150/31	10.2.59.150 – 10.2.59.151	10.2.59.151
205	10.2.59.152/31	10.2.59.152 – 10.2.59.153	10.2.59.153
206	10.2.59.154/31	10.2.59.154 – 10.2.59.155	10.2.59.155
207	10.2.59.156/31	10.2.59.156 – 10.2.59.157	10.2.59.157
208	10.2.59.158/31	10.2.59.158 – 10.2.59.159	10.2.59.159
209	10.2.59.160/31	10.2.59.160 – 10.2.59.161	10.2.59.161
210	10.2.59.162/31	10.2.59.162 – 10.2.59.163	10.2.59.163
211	10.2.59.164/31	10.2.59.164 – 10.2.59.165	10.2.59.165
212	10.2.59.166/31	10.2.59.166 – 10.2.59.167	10.2.59.167
213	10.2.59.168/31	10.2.59.168 – 10.2.59.169	10.2.59.169
214	10.2.59.170/31	10.2.59.170 – 10.2.59.171	10.2.59.171
215	10.2.59.172/31	10.2.59.172 – 10.2.59.173	10.2.59.173
216	10.2.59.174/31	10.2.59.174 – 10.2.59.175	10.2.59.175
217	10.2.59.176/31	10.2.59.176 – 10.2.59.177	10.2.59.177
218	10.2.59.178/31	10.2.59.178 – 10.2.59.179	10.2.59.179
219	10.2.59.180/31	10.2.59.180 – 10.2.59.181	10.2.59.181
220	10.2.59.182/31	10.2.59.182 – 10.2.59.183	10.2.59.183
221	10.2.59.184/31	10.2.59.184 – 10.2.59.185	10.2.59.185
222	10.2.59.186/31	10.2.59.186 – 10.2.59.187	10.2.59.187
223	10.2.59.188/31	10.2.59.188 – 10.2.59.189	10.2.59.189
224	10.2.59.190/31	10.2.59.190 – 10.2.59.191	10.2.59.191
225	10.2.59.192/31	10.2.59.192 – 10.2.59.193	10.2.59.193
226	10.2.59.194/31	10.2.59.194 – 10.2.59.195	10.2.59.195
227	10.2.59.196/31	10.2.59.196 – 10.2.59.197	10.2.59.197
228	10.2.59.198/31	10.2.59.198 – 10.2.59.199	10.2.59.199
229	10.2.59.200/31	10.2.59.200 – 10.2.59.201	10.2.59.201
230	10.2.59.202/31	10.2.59.202 – 10.2.59.203	10.2.59.203
231	10.2.59.204/31	10.2.59.204 – 10.2.59.205	10.2.59.205
232	10.2.59.206/31	10.2.59.206 – 10.2.59.207	10.2.59.207
233	10.2.59.208/31	10.2.59.208 – 10.2.59.209	10.2.59.209
234	10.2.59.210/31	10.2.59.210 – 10.2.59.211	10.2.59.211
235	10.2.59.212/31	10.2.59.212 – 10.2.59.213	10.2.59.213
236	10.2.59.214/31	10.2.59.214 – 10.2.59.215	10.2.59.215
237	10.2.59.216/31	10.2.59.216 – 10.2.59.217	10.2.59.217
238	10.2.59.218/31	10.2.59.218 – 10.2.59.219	10.2.59.219
239	10.2.59.220/31	10.2.59.220 – 10.2.59.221	10.2.59.221
240	10.2.59.222/31	10.2.59.222 – 10.2.59.223	10.2.59.223
241	10.2.59.224/31	10.2.59.224 – 10.2.59.225	10.2.59.225
242	10.2.59.226/31	10.2.59.226 – 10.2.59.227	10.2.59.227
243	10.2.59.228/31	10.2.59.228 – 10.2.59.229	10.2.59.229
244	10.2.59.230/31	10.2.59.230 – 10.2.59.231	10.2.59.231
245	10.2.59.232/31	10.2.59.232 – 10.2.59.233	10.2.59.233
246	10.2.59.234/31	10.2.59.234 – 10.2.59.235	10.2.59.235
247	10.2.59.236/31	10.2.59.236 – 10.2.59.237	10.2.59.237
248	10.2.59.238/31	10.2.59.238 – 10.2.59.239	10.2.59.239
249	10.2.59.240/31	10.2.59.240 – 10.2.59.241	10.2.59.241
250	10.2.59.242/31	10.2.59.242 – 10.2.59.243	10.2.59.243
251	10.2.59.244/31	10.2.59.244 – 10.2.59.245	10.2.59.245
252	10.2.59.246/31	10.2.59.246 – 10.2.59.247	10.2.59.247
253	10.2.59.248/31	10.2.59.248 – 10.2.59.249	10.2.59.249
254	10.2.59.250/31	10.2.59.250 – 10.2.59.251	10.2.59.251
255	10.2.59.252/31	10.2.59.252 – 10.2.59.253	10.2.59.253
256	10.2.59.254/31	10.2.59.254 – 10.2.59.255	10.2.59.255

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 →