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)10.158.99.0/24

network10.158.99.0/24

broadcast10.158.99.255

first host10.158.99.1

last host10.158.99.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.158.99.0/24

address00001010.10011110.01100011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10011110.01100011.00000000

broadcast00001010.10011110.01100011.11111111

green = network part, grey = host part

hex0x0a9e6300

decimal178152192

reverse dns0.99.158.10.in-addr.arpa

ipv4-mapped::ffff:a9e:6300

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.158.99.0/32	10.158.99.0 – 10.158.99.0	10.158.99.0
2	10.158.99.1/32	10.158.99.1 – 10.158.99.1	10.158.99.1
3	10.158.99.2/32	10.158.99.2 – 10.158.99.2	10.158.99.2
4	10.158.99.3/32	10.158.99.3 – 10.158.99.3	10.158.99.3
5	10.158.99.4/32	10.158.99.4 – 10.158.99.4	10.158.99.4
6	10.158.99.5/32	10.158.99.5 – 10.158.99.5	10.158.99.5
7	10.158.99.6/32	10.158.99.6 – 10.158.99.6	10.158.99.6
8	10.158.99.7/32	10.158.99.7 – 10.158.99.7	10.158.99.7
9	10.158.99.8/32	10.158.99.8 – 10.158.99.8	10.158.99.8
10	10.158.99.9/32	10.158.99.9 – 10.158.99.9	10.158.99.9
11	10.158.99.10/32	10.158.99.10 – 10.158.99.10	10.158.99.10
12	10.158.99.11/32	10.158.99.11 – 10.158.99.11	10.158.99.11
13	10.158.99.12/32	10.158.99.12 – 10.158.99.12	10.158.99.12
14	10.158.99.13/32	10.158.99.13 – 10.158.99.13	10.158.99.13
15	10.158.99.14/32	10.158.99.14 – 10.158.99.14	10.158.99.14
16	10.158.99.15/32	10.158.99.15 – 10.158.99.15	10.158.99.15
17	10.158.99.16/32	10.158.99.16 – 10.158.99.16	10.158.99.16
18	10.158.99.17/32	10.158.99.17 – 10.158.99.17	10.158.99.17
19	10.158.99.18/32	10.158.99.18 – 10.158.99.18	10.158.99.18
20	10.158.99.19/32	10.158.99.19 – 10.158.99.19	10.158.99.19
21	10.158.99.20/32	10.158.99.20 – 10.158.99.20	10.158.99.20
22	10.158.99.21/32	10.158.99.21 – 10.158.99.21	10.158.99.21
23	10.158.99.22/32	10.158.99.22 – 10.158.99.22	10.158.99.22
24	10.158.99.23/32	10.158.99.23 – 10.158.99.23	10.158.99.23
25	10.158.99.24/32	10.158.99.24 – 10.158.99.24	10.158.99.24
26	10.158.99.25/32	10.158.99.25 – 10.158.99.25	10.158.99.25
27	10.158.99.26/32	10.158.99.26 – 10.158.99.26	10.158.99.26
28	10.158.99.27/32	10.158.99.27 – 10.158.99.27	10.158.99.27
29	10.158.99.28/32	10.158.99.28 – 10.158.99.28	10.158.99.28
30	10.158.99.29/32	10.158.99.29 – 10.158.99.29	10.158.99.29
31	10.158.99.30/32	10.158.99.30 – 10.158.99.30	10.158.99.30
32	10.158.99.31/32	10.158.99.31 – 10.158.99.31	10.158.99.31
33	10.158.99.32/32	10.158.99.32 – 10.158.99.32	10.158.99.32
34	10.158.99.33/32	10.158.99.33 – 10.158.99.33	10.158.99.33
35	10.158.99.34/32	10.158.99.34 – 10.158.99.34	10.158.99.34
36	10.158.99.35/32	10.158.99.35 – 10.158.99.35	10.158.99.35
37	10.158.99.36/32	10.158.99.36 – 10.158.99.36	10.158.99.36
38	10.158.99.37/32	10.158.99.37 – 10.158.99.37	10.158.99.37
39	10.158.99.38/32	10.158.99.38 – 10.158.99.38	10.158.99.38
40	10.158.99.39/32	10.158.99.39 – 10.158.99.39	10.158.99.39
41	10.158.99.40/32	10.158.99.40 – 10.158.99.40	10.158.99.40
42	10.158.99.41/32	10.158.99.41 – 10.158.99.41	10.158.99.41
43	10.158.99.42/32	10.158.99.42 – 10.158.99.42	10.158.99.42
44	10.158.99.43/32	10.158.99.43 – 10.158.99.43	10.158.99.43
45	10.158.99.44/32	10.158.99.44 – 10.158.99.44	10.158.99.44
46	10.158.99.45/32	10.158.99.45 – 10.158.99.45	10.158.99.45
47	10.158.99.46/32	10.158.99.46 – 10.158.99.46	10.158.99.46
48	10.158.99.47/32	10.158.99.47 – 10.158.99.47	10.158.99.47
49	10.158.99.48/32	10.158.99.48 – 10.158.99.48	10.158.99.48
50	10.158.99.49/32	10.158.99.49 – 10.158.99.49	10.158.99.49
51	10.158.99.50/32	10.158.99.50 – 10.158.99.50	10.158.99.50
52	10.158.99.51/32	10.158.99.51 – 10.158.99.51	10.158.99.51
53	10.158.99.52/32	10.158.99.52 – 10.158.99.52	10.158.99.52
54	10.158.99.53/32	10.158.99.53 – 10.158.99.53	10.158.99.53
55	10.158.99.54/32	10.158.99.54 – 10.158.99.54	10.158.99.54
56	10.158.99.55/32	10.158.99.55 – 10.158.99.55	10.158.99.55
57	10.158.99.56/32	10.158.99.56 – 10.158.99.56	10.158.99.56
58	10.158.99.57/32	10.158.99.57 – 10.158.99.57	10.158.99.57
59	10.158.99.58/32	10.158.99.58 – 10.158.99.58	10.158.99.58
60	10.158.99.59/32	10.158.99.59 – 10.158.99.59	10.158.99.59
61	10.158.99.60/32	10.158.99.60 – 10.158.99.60	10.158.99.60
62	10.158.99.61/32	10.158.99.61 – 10.158.99.61	10.158.99.61
63	10.158.99.62/32	10.158.99.62 – 10.158.99.62	10.158.99.62
64	10.158.99.63/32	10.158.99.63 – 10.158.99.63	10.158.99.63
65	10.158.99.64/32	10.158.99.64 – 10.158.99.64	10.158.99.64
66	10.158.99.65/32	10.158.99.65 – 10.158.99.65	10.158.99.65
67	10.158.99.66/32	10.158.99.66 – 10.158.99.66	10.158.99.66
68	10.158.99.67/32	10.158.99.67 – 10.158.99.67	10.158.99.67
69	10.158.99.68/32	10.158.99.68 – 10.158.99.68	10.158.99.68
70	10.158.99.69/32	10.158.99.69 – 10.158.99.69	10.158.99.69
71	10.158.99.70/32	10.158.99.70 – 10.158.99.70	10.158.99.70
72	10.158.99.71/32	10.158.99.71 – 10.158.99.71	10.158.99.71
73	10.158.99.72/32	10.158.99.72 – 10.158.99.72	10.158.99.72
74	10.158.99.73/32	10.158.99.73 – 10.158.99.73	10.158.99.73
75	10.158.99.74/32	10.158.99.74 – 10.158.99.74	10.158.99.74
76	10.158.99.75/32	10.158.99.75 – 10.158.99.75	10.158.99.75
77	10.158.99.76/32	10.158.99.76 – 10.158.99.76	10.158.99.76
78	10.158.99.77/32	10.158.99.77 – 10.158.99.77	10.158.99.77
79	10.158.99.78/32	10.158.99.78 – 10.158.99.78	10.158.99.78
80	10.158.99.79/32	10.158.99.79 – 10.158.99.79	10.158.99.79
81	10.158.99.80/32	10.158.99.80 – 10.158.99.80	10.158.99.80
82	10.158.99.81/32	10.158.99.81 – 10.158.99.81	10.158.99.81
83	10.158.99.82/32	10.158.99.82 – 10.158.99.82	10.158.99.82
84	10.158.99.83/32	10.158.99.83 – 10.158.99.83	10.158.99.83
85	10.158.99.84/32	10.158.99.84 – 10.158.99.84	10.158.99.84
86	10.158.99.85/32	10.158.99.85 – 10.158.99.85	10.158.99.85
87	10.158.99.86/32	10.158.99.86 – 10.158.99.86	10.158.99.86
88	10.158.99.87/32	10.158.99.87 – 10.158.99.87	10.158.99.87
89	10.158.99.88/32	10.158.99.88 – 10.158.99.88	10.158.99.88
90	10.158.99.89/32	10.158.99.89 – 10.158.99.89	10.158.99.89
91	10.158.99.90/32	10.158.99.90 – 10.158.99.90	10.158.99.90
92	10.158.99.91/32	10.158.99.91 – 10.158.99.91	10.158.99.91
93	10.158.99.92/32	10.158.99.92 – 10.158.99.92	10.158.99.92
94	10.158.99.93/32	10.158.99.93 – 10.158.99.93	10.158.99.93
95	10.158.99.94/32	10.158.99.94 – 10.158.99.94	10.158.99.94
96	10.158.99.95/32	10.158.99.95 – 10.158.99.95	10.158.99.95
97	10.158.99.96/32	10.158.99.96 – 10.158.99.96	10.158.99.96
98	10.158.99.97/32	10.158.99.97 – 10.158.99.97	10.158.99.97
99	10.158.99.98/32	10.158.99.98 – 10.158.99.98	10.158.99.98
100	10.158.99.99/32	10.158.99.99 – 10.158.99.99	10.158.99.99
101	10.158.99.100/32	10.158.99.100 – 10.158.99.100	10.158.99.100
102	10.158.99.101/32	10.158.99.101 – 10.158.99.101	10.158.99.101
103	10.158.99.102/32	10.158.99.102 – 10.158.99.102	10.158.99.102
104	10.158.99.103/32	10.158.99.103 – 10.158.99.103	10.158.99.103
105	10.158.99.104/32	10.158.99.104 – 10.158.99.104	10.158.99.104
106	10.158.99.105/32	10.158.99.105 – 10.158.99.105	10.158.99.105
107	10.158.99.106/32	10.158.99.106 – 10.158.99.106	10.158.99.106
108	10.158.99.107/32	10.158.99.107 – 10.158.99.107	10.158.99.107
109	10.158.99.108/32	10.158.99.108 – 10.158.99.108	10.158.99.108
110	10.158.99.109/32	10.158.99.109 – 10.158.99.109	10.158.99.109
111	10.158.99.110/32	10.158.99.110 – 10.158.99.110	10.158.99.110
112	10.158.99.111/32	10.158.99.111 – 10.158.99.111	10.158.99.111
113	10.158.99.112/32	10.158.99.112 – 10.158.99.112	10.158.99.112
114	10.158.99.113/32	10.158.99.113 – 10.158.99.113	10.158.99.113
115	10.158.99.114/32	10.158.99.114 – 10.158.99.114	10.158.99.114
116	10.158.99.115/32	10.158.99.115 – 10.158.99.115	10.158.99.115
117	10.158.99.116/32	10.158.99.116 – 10.158.99.116	10.158.99.116
118	10.158.99.117/32	10.158.99.117 – 10.158.99.117	10.158.99.117
119	10.158.99.118/32	10.158.99.118 – 10.158.99.118	10.158.99.118
120	10.158.99.119/32	10.158.99.119 – 10.158.99.119	10.158.99.119
121	10.158.99.120/32	10.158.99.120 – 10.158.99.120	10.158.99.120
122	10.158.99.121/32	10.158.99.121 – 10.158.99.121	10.158.99.121
123	10.158.99.122/32	10.158.99.122 – 10.158.99.122	10.158.99.122
124	10.158.99.123/32	10.158.99.123 – 10.158.99.123	10.158.99.123
125	10.158.99.124/32	10.158.99.124 – 10.158.99.124	10.158.99.124
126	10.158.99.125/32	10.158.99.125 – 10.158.99.125	10.158.99.125
127	10.158.99.126/32	10.158.99.126 – 10.158.99.126	10.158.99.126
128	10.158.99.127/32	10.158.99.127 – 10.158.99.127	10.158.99.127
129	10.158.99.128/32	10.158.99.128 – 10.158.99.128	10.158.99.128
130	10.158.99.129/32	10.158.99.129 – 10.158.99.129	10.158.99.129
131	10.158.99.130/32	10.158.99.130 – 10.158.99.130	10.158.99.130
132	10.158.99.131/32	10.158.99.131 – 10.158.99.131	10.158.99.131
133	10.158.99.132/32	10.158.99.132 – 10.158.99.132	10.158.99.132
134	10.158.99.133/32	10.158.99.133 – 10.158.99.133	10.158.99.133
135	10.158.99.134/32	10.158.99.134 – 10.158.99.134	10.158.99.134
136	10.158.99.135/32	10.158.99.135 – 10.158.99.135	10.158.99.135
137	10.158.99.136/32	10.158.99.136 – 10.158.99.136	10.158.99.136
138	10.158.99.137/32	10.158.99.137 – 10.158.99.137	10.158.99.137
139	10.158.99.138/32	10.158.99.138 – 10.158.99.138	10.158.99.138
140	10.158.99.139/32	10.158.99.139 – 10.158.99.139	10.158.99.139
141	10.158.99.140/32	10.158.99.140 – 10.158.99.140	10.158.99.140
142	10.158.99.141/32	10.158.99.141 – 10.158.99.141	10.158.99.141
143	10.158.99.142/32	10.158.99.142 – 10.158.99.142	10.158.99.142
144	10.158.99.143/32	10.158.99.143 – 10.158.99.143	10.158.99.143
145	10.158.99.144/32	10.158.99.144 – 10.158.99.144	10.158.99.144
146	10.158.99.145/32	10.158.99.145 – 10.158.99.145	10.158.99.145
147	10.158.99.146/32	10.158.99.146 – 10.158.99.146	10.158.99.146
148	10.158.99.147/32	10.158.99.147 – 10.158.99.147	10.158.99.147
149	10.158.99.148/32	10.158.99.148 – 10.158.99.148	10.158.99.148
150	10.158.99.149/32	10.158.99.149 – 10.158.99.149	10.158.99.149
151	10.158.99.150/32	10.158.99.150 – 10.158.99.150	10.158.99.150
152	10.158.99.151/32	10.158.99.151 – 10.158.99.151	10.158.99.151
153	10.158.99.152/32	10.158.99.152 – 10.158.99.152	10.158.99.152
154	10.158.99.153/32	10.158.99.153 – 10.158.99.153	10.158.99.153
155	10.158.99.154/32	10.158.99.154 – 10.158.99.154	10.158.99.154
156	10.158.99.155/32	10.158.99.155 – 10.158.99.155	10.158.99.155
157	10.158.99.156/32	10.158.99.156 – 10.158.99.156	10.158.99.156
158	10.158.99.157/32	10.158.99.157 – 10.158.99.157	10.158.99.157
159	10.158.99.158/32	10.158.99.158 – 10.158.99.158	10.158.99.158
160	10.158.99.159/32	10.158.99.159 – 10.158.99.159	10.158.99.159
161	10.158.99.160/32	10.158.99.160 – 10.158.99.160	10.158.99.160
162	10.158.99.161/32	10.158.99.161 – 10.158.99.161	10.158.99.161
163	10.158.99.162/32	10.158.99.162 – 10.158.99.162	10.158.99.162
164	10.158.99.163/32	10.158.99.163 – 10.158.99.163	10.158.99.163
165	10.158.99.164/32	10.158.99.164 – 10.158.99.164	10.158.99.164
166	10.158.99.165/32	10.158.99.165 – 10.158.99.165	10.158.99.165
167	10.158.99.166/32	10.158.99.166 – 10.158.99.166	10.158.99.166
168	10.158.99.167/32	10.158.99.167 – 10.158.99.167	10.158.99.167
169	10.158.99.168/32	10.158.99.168 – 10.158.99.168	10.158.99.168
170	10.158.99.169/32	10.158.99.169 – 10.158.99.169	10.158.99.169
171	10.158.99.170/32	10.158.99.170 – 10.158.99.170	10.158.99.170
172	10.158.99.171/32	10.158.99.171 – 10.158.99.171	10.158.99.171
173	10.158.99.172/32	10.158.99.172 – 10.158.99.172	10.158.99.172
174	10.158.99.173/32	10.158.99.173 – 10.158.99.173	10.158.99.173
175	10.158.99.174/32	10.158.99.174 – 10.158.99.174	10.158.99.174
176	10.158.99.175/32	10.158.99.175 – 10.158.99.175	10.158.99.175
177	10.158.99.176/32	10.158.99.176 – 10.158.99.176	10.158.99.176
178	10.158.99.177/32	10.158.99.177 – 10.158.99.177	10.158.99.177
179	10.158.99.178/32	10.158.99.178 – 10.158.99.178	10.158.99.178
180	10.158.99.179/32	10.158.99.179 – 10.158.99.179	10.158.99.179
181	10.158.99.180/32	10.158.99.180 – 10.158.99.180	10.158.99.180
182	10.158.99.181/32	10.158.99.181 – 10.158.99.181	10.158.99.181
183	10.158.99.182/32	10.158.99.182 – 10.158.99.182	10.158.99.182
184	10.158.99.183/32	10.158.99.183 – 10.158.99.183	10.158.99.183
185	10.158.99.184/32	10.158.99.184 – 10.158.99.184	10.158.99.184
186	10.158.99.185/32	10.158.99.185 – 10.158.99.185	10.158.99.185
187	10.158.99.186/32	10.158.99.186 – 10.158.99.186	10.158.99.186
188	10.158.99.187/32	10.158.99.187 – 10.158.99.187	10.158.99.187
189	10.158.99.188/32	10.158.99.188 – 10.158.99.188	10.158.99.188
190	10.158.99.189/32	10.158.99.189 – 10.158.99.189	10.158.99.189
191	10.158.99.190/32	10.158.99.190 – 10.158.99.190	10.158.99.190
192	10.158.99.191/32	10.158.99.191 – 10.158.99.191	10.158.99.191
193	10.158.99.192/32	10.158.99.192 – 10.158.99.192	10.158.99.192
194	10.158.99.193/32	10.158.99.193 – 10.158.99.193	10.158.99.193
195	10.158.99.194/32	10.158.99.194 – 10.158.99.194	10.158.99.194
196	10.158.99.195/32	10.158.99.195 – 10.158.99.195	10.158.99.195
197	10.158.99.196/32	10.158.99.196 – 10.158.99.196	10.158.99.196
198	10.158.99.197/32	10.158.99.197 – 10.158.99.197	10.158.99.197
199	10.158.99.198/32	10.158.99.198 – 10.158.99.198	10.158.99.198
200	10.158.99.199/32	10.158.99.199 – 10.158.99.199	10.158.99.199
201	10.158.99.200/32	10.158.99.200 – 10.158.99.200	10.158.99.200
202	10.158.99.201/32	10.158.99.201 – 10.158.99.201	10.158.99.201
203	10.158.99.202/32	10.158.99.202 – 10.158.99.202	10.158.99.202
204	10.158.99.203/32	10.158.99.203 – 10.158.99.203	10.158.99.203
205	10.158.99.204/32	10.158.99.204 – 10.158.99.204	10.158.99.204
206	10.158.99.205/32	10.158.99.205 – 10.158.99.205	10.158.99.205
207	10.158.99.206/32	10.158.99.206 – 10.158.99.206	10.158.99.206
208	10.158.99.207/32	10.158.99.207 – 10.158.99.207	10.158.99.207
209	10.158.99.208/32	10.158.99.208 – 10.158.99.208	10.158.99.208
210	10.158.99.209/32	10.158.99.209 – 10.158.99.209	10.158.99.209
211	10.158.99.210/32	10.158.99.210 – 10.158.99.210	10.158.99.210
212	10.158.99.211/32	10.158.99.211 – 10.158.99.211	10.158.99.211
213	10.158.99.212/32	10.158.99.212 – 10.158.99.212	10.158.99.212
214	10.158.99.213/32	10.158.99.213 – 10.158.99.213	10.158.99.213
215	10.158.99.214/32	10.158.99.214 – 10.158.99.214	10.158.99.214
216	10.158.99.215/32	10.158.99.215 – 10.158.99.215	10.158.99.215
217	10.158.99.216/32	10.158.99.216 – 10.158.99.216	10.158.99.216
218	10.158.99.217/32	10.158.99.217 – 10.158.99.217	10.158.99.217
219	10.158.99.218/32	10.158.99.218 – 10.158.99.218	10.158.99.218
220	10.158.99.219/32	10.158.99.219 – 10.158.99.219	10.158.99.219
221	10.158.99.220/32	10.158.99.220 – 10.158.99.220	10.158.99.220
222	10.158.99.221/32	10.158.99.221 – 10.158.99.221	10.158.99.221
223	10.158.99.222/32	10.158.99.222 – 10.158.99.222	10.158.99.222
224	10.158.99.223/32	10.158.99.223 – 10.158.99.223	10.158.99.223
225	10.158.99.224/32	10.158.99.224 – 10.158.99.224	10.158.99.224
226	10.158.99.225/32	10.158.99.225 – 10.158.99.225	10.158.99.225
227	10.158.99.226/32	10.158.99.226 – 10.158.99.226	10.158.99.226
228	10.158.99.227/32	10.158.99.227 – 10.158.99.227	10.158.99.227
229	10.158.99.228/32	10.158.99.228 – 10.158.99.228	10.158.99.228
230	10.158.99.229/32	10.158.99.229 – 10.158.99.229	10.158.99.229
231	10.158.99.230/32	10.158.99.230 – 10.158.99.230	10.158.99.230
232	10.158.99.231/32	10.158.99.231 – 10.158.99.231	10.158.99.231
233	10.158.99.232/32	10.158.99.232 – 10.158.99.232	10.158.99.232
234	10.158.99.233/32	10.158.99.233 – 10.158.99.233	10.158.99.233
235	10.158.99.234/32	10.158.99.234 – 10.158.99.234	10.158.99.234
236	10.158.99.235/32	10.158.99.235 – 10.158.99.235	10.158.99.235
237	10.158.99.236/32	10.158.99.236 – 10.158.99.236	10.158.99.236
238	10.158.99.237/32	10.158.99.237 – 10.158.99.237	10.158.99.237
239	10.158.99.238/32	10.158.99.238 – 10.158.99.238	10.158.99.238
240	10.158.99.239/32	10.158.99.239 – 10.158.99.239	10.158.99.239
241	10.158.99.240/32	10.158.99.240 – 10.158.99.240	10.158.99.240
242	10.158.99.241/32	10.158.99.241 – 10.158.99.241	10.158.99.241
243	10.158.99.242/32	10.158.99.242 – 10.158.99.242	10.158.99.242
244	10.158.99.243/32	10.158.99.243 – 10.158.99.243	10.158.99.243
245	10.158.99.244/32	10.158.99.244 – 10.158.99.244	10.158.99.244
246	10.158.99.245/32	10.158.99.245 – 10.158.99.245	10.158.99.245
247	10.158.99.246/32	10.158.99.246 – 10.158.99.246	10.158.99.246
248	10.158.99.247/32	10.158.99.247 – 10.158.99.247	10.158.99.247
249	10.158.99.248/32	10.158.99.248 – 10.158.99.248	10.158.99.248
250	10.158.99.249/32	10.158.99.249 – 10.158.99.249	10.158.99.249
251	10.158.99.250/32	10.158.99.250 – 10.158.99.250	10.158.99.250
252	10.158.99.251/32	10.158.99.251 – 10.158.99.251	10.158.99.251
253	10.158.99.252/32	10.158.99.252 – 10.158.99.252	10.158.99.252
254	10.158.99.253/32	10.158.99.253 – 10.158.99.253	10.158.99.253
255	10.158.99.254/32	10.158.99.254 – 10.158.99.254	10.158.99.254
256	10.158.99.255/32	10.158.99.255 – 10.158.99.255	10.158.99.255

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 /24
/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	-
/24	255.255.255.0	256	254	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 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 →