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)10.80.85.0/24

network10.80.85.0/24

broadcast10.80.85.255

first host10.80.85.1

last host10.80.85.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.80.85.0/24

address00001010.01010000.01010101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01010000.01010101.00000000

broadcast00001010.01010000.01010101.11111111

green = network part, grey = host part

hex0x0a505500

decimal173036800

reverse dns0.85.80.10.in-addr.arpa

ipv4-mapped::ffff:a50:5500

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.80.85.0/32	10.80.85.0 – 10.80.85.0	10.80.85.0
2	10.80.85.1/32	10.80.85.1 – 10.80.85.1	10.80.85.1
3	10.80.85.2/32	10.80.85.2 – 10.80.85.2	10.80.85.2
4	10.80.85.3/32	10.80.85.3 – 10.80.85.3	10.80.85.3
5	10.80.85.4/32	10.80.85.4 – 10.80.85.4	10.80.85.4
6	10.80.85.5/32	10.80.85.5 – 10.80.85.5	10.80.85.5
7	10.80.85.6/32	10.80.85.6 – 10.80.85.6	10.80.85.6
8	10.80.85.7/32	10.80.85.7 – 10.80.85.7	10.80.85.7
9	10.80.85.8/32	10.80.85.8 – 10.80.85.8	10.80.85.8
10	10.80.85.9/32	10.80.85.9 – 10.80.85.9	10.80.85.9
11	10.80.85.10/32	10.80.85.10 – 10.80.85.10	10.80.85.10
12	10.80.85.11/32	10.80.85.11 – 10.80.85.11	10.80.85.11
13	10.80.85.12/32	10.80.85.12 – 10.80.85.12	10.80.85.12
14	10.80.85.13/32	10.80.85.13 – 10.80.85.13	10.80.85.13
15	10.80.85.14/32	10.80.85.14 – 10.80.85.14	10.80.85.14
16	10.80.85.15/32	10.80.85.15 – 10.80.85.15	10.80.85.15
17	10.80.85.16/32	10.80.85.16 – 10.80.85.16	10.80.85.16
18	10.80.85.17/32	10.80.85.17 – 10.80.85.17	10.80.85.17
19	10.80.85.18/32	10.80.85.18 – 10.80.85.18	10.80.85.18
20	10.80.85.19/32	10.80.85.19 – 10.80.85.19	10.80.85.19
21	10.80.85.20/32	10.80.85.20 – 10.80.85.20	10.80.85.20
22	10.80.85.21/32	10.80.85.21 – 10.80.85.21	10.80.85.21
23	10.80.85.22/32	10.80.85.22 – 10.80.85.22	10.80.85.22
24	10.80.85.23/32	10.80.85.23 – 10.80.85.23	10.80.85.23
25	10.80.85.24/32	10.80.85.24 – 10.80.85.24	10.80.85.24
26	10.80.85.25/32	10.80.85.25 – 10.80.85.25	10.80.85.25
27	10.80.85.26/32	10.80.85.26 – 10.80.85.26	10.80.85.26
28	10.80.85.27/32	10.80.85.27 – 10.80.85.27	10.80.85.27
29	10.80.85.28/32	10.80.85.28 – 10.80.85.28	10.80.85.28
30	10.80.85.29/32	10.80.85.29 – 10.80.85.29	10.80.85.29
31	10.80.85.30/32	10.80.85.30 – 10.80.85.30	10.80.85.30
32	10.80.85.31/32	10.80.85.31 – 10.80.85.31	10.80.85.31
33	10.80.85.32/32	10.80.85.32 – 10.80.85.32	10.80.85.32
34	10.80.85.33/32	10.80.85.33 – 10.80.85.33	10.80.85.33
35	10.80.85.34/32	10.80.85.34 – 10.80.85.34	10.80.85.34
36	10.80.85.35/32	10.80.85.35 – 10.80.85.35	10.80.85.35
37	10.80.85.36/32	10.80.85.36 – 10.80.85.36	10.80.85.36
38	10.80.85.37/32	10.80.85.37 – 10.80.85.37	10.80.85.37
39	10.80.85.38/32	10.80.85.38 – 10.80.85.38	10.80.85.38
40	10.80.85.39/32	10.80.85.39 – 10.80.85.39	10.80.85.39
41	10.80.85.40/32	10.80.85.40 – 10.80.85.40	10.80.85.40
42	10.80.85.41/32	10.80.85.41 – 10.80.85.41	10.80.85.41
43	10.80.85.42/32	10.80.85.42 – 10.80.85.42	10.80.85.42
44	10.80.85.43/32	10.80.85.43 – 10.80.85.43	10.80.85.43
45	10.80.85.44/32	10.80.85.44 – 10.80.85.44	10.80.85.44
46	10.80.85.45/32	10.80.85.45 – 10.80.85.45	10.80.85.45
47	10.80.85.46/32	10.80.85.46 – 10.80.85.46	10.80.85.46
48	10.80.85.47/32	10.80.85.47 – 10.80.85.47	10.80.85.47
49	10.80.85.48/32	10.80.85.48 – 10.80.85.48	10.80.85.48
50	10.80.85.49/32	10.80.85.49 – 10.80.85.49	10.80.85.49
51	10.80.85.50/32	10.80.85.50 – 10.80.85.50	10.80.85.50
52	10.80.85.51/32	10.80.85.51 – 10.80.85.51	10.80.85.51
53	10.80.85.52/32	10.80.85.52 – 10.80.85.52	10.80.85.52
54	10.80.85.53/32	10.80.85.53 – 10.80.85.53	10.80.85.53
55	10.80.85.54/32	10.80.85.54 – 10.80.85.54	10.80.85.54
56	10.80.85.55/32	10.80.85.55 – 10.80.85.55	10.80.85.55
57	10.80.85.56/32	10.80.85.56 – 10.80.85.56	10.80.85.56
58	10.80.85.57/32	10.80.85.57 – 10.80.85.57	10.80.85.57
59	10.80.85.58/32	10.80.85.58 – 10.80.85.58	10.80.85.58
60	10.80.85.59/32	10.80.85.59 – 10.80.85.59	10.80.85.59
61	10.80.85.60/32	10.80.85.60 – 10.80.85.60	10.80.85.60
62	10.80.85.61/32	10.80.85.61 – 10.80.85.61	10.80.85.61
63	10.80.85.62/32	10.80.85.62 – 10.80.85.62	10.80.85.62
64	10.80.85.63/32	10.80.85.63 – 10.80.85.63	10.80.85.63
65	10.80.85.64/32	10.80.85.64 – 10.80.85.64	10.80.85.64
66	10.80.85.65/32	10.80.85.65 – 10.80.85.65	10.80.85.65
67	10.80.85.66/32	10.80.85.66 – 10.80.85.66	10.80.85.66
68	10.80.85.67/32	10.80.85.67 – 10.80.85.67	10.80.85.67
69	10.80.85.68/32	10.80.85.68 – 10.80.85.68	10.80.85.68
70	10.80.85.69/32	10.80.85.69 – 10.80.85.69	10.80.85.69
71	10.80.85.70/32	10.80.85.70 – 10.80.85.70	10.80.85.70
72	10.80.85.71/32	10.80.85.71 – 10.80.85.71	10.80.85.71
73	10.80.85.72/32	10.80.85.72 – 10.80.85.72	10.80.85.72
74	10.80.85.73/32	10.80.85.73 – 10.80.85.73	10.80.85.73
75	10.80.85.74/32	10.80.85.74 – 10.80.85.74	10.80.85.74
76	10.80.85.75/32	10.80.85.75 – 10.80.85.75	10.80.85.75
77	10.80.85.76/32	10.80.85.76 – 10.80.85.76	10.80.85.76
78	10.80.85.77/32	10.80.85.77 – 10.80.85.77	10.80.85.77
79	10.80.85.78/32	10.80.85.78 – 10.80.85.78	10.80.85.78
80	10.80.85.79/32	10.80.85.79 – 10.80.85.79	10.80.85.79
81	10.80.85.80/32	10.80.85.80 – 10.80.85.80	10.80.85.80
82	10.80.85.81/32	10.80.85.81 – 10.80.85.81	10.80.85.81
83	10.80.85.82/32	10.80.85.82 – 10.80.85.82	10.80.85.82
84	10.80.85.83/32	10.80.85.83 – 10.80.85.83	10.80.85.83
85	10.80.85.84/32	10.80.85.84 – 10.80.85.84	10.80.85.84
86	10.80.85.85/32	10.80.85.85 – 10.80.85.85	10.80.85.85
87	10.80.85.86/32	10.80.85.86 – 10.80.85.86	10.80.85.86
88	10.80.85.87/32	10.80.85.87 – 10.80.85.87	10.80.85.87
89	10.80.85.88/32	10.80.85.88 – 10.80.85.88	10.80.85.88
90	10.80.85.89/32	10.80.85.89 – 10.80.85.89	10.80.85.89
91	10.80.85.90/32	10.80.85.90 – 10.80.85.90	10.80.85.90
92	10.80.85.91/32	10.80.85.91 – 10.80.85.91	10.80.85.91
93	10.80.85.92/32	10.80.85.92 – 10.80.85.92	10.80.85.92
94	10.80.85.93/32	10.80.85.93 – 10.80.85.93	10.80.85.93
95	10.80.85.94/32	10.80.85.94 – 10.80.85.94	10.80.85.94
96	10.80.85.95/32	10.80.85.95 – 10.80.85.95	10.80.85.95
97	10.80.85.96/32	10.80.85.96 – 10.80.85.96	10.80.85.96
98	10.80.85.97/32	10.80.85.97 – 10.80.85.97	10.80.85.97
99	10.80.85.98/32	10.80.85.98 – 10.80.85.98	10.80.85.98
100	10.80.85.99/32	10.80.85.99 – 10.80.85.99	10.80.85.99
101	10.80.85.100/32	10.80.85.100 – 10.80.85.100	10.80.85.100
102	10.80.85.101/32	10.80.85.101 – 10.80.85.101	10.80.85.101
103	10.80.85.102/32	10.80.85.102 – 10.80.85.102	10.80.85.102
104	10.80.85.103/32	10.80.85.103 – 10.80.85.103	10.80.85.103
105	10.80.85.104/32	10.80.85.104 – 10.80.85.104	10.80.85.104
106	10.80.85.105/32	10.80.85.105 – 10.80.85.105	10.80.85.105
107	10.80.85.106/32	10.80.85.106 – 10.80.85.106	10.80.85.106
108	10.80.85.107/32	10.80.85.107 – 10.80.85.107	10.80.85.107
109	10.80.85.108/32	10.80.85.108 – 10.80.85.108	10.80.85.108
110	10.80.85.109/32	10.80.85.109 – 10.80.85.109	10.80.85.109
111	10.80.85.110/32	10.80.85.110 – 10.80.85.110	10.80.85.110
112	10.80.85.111/32	10.80.85.111 – 10.80.85.111	10.80.85.111
113	10.80.85.112/32	10.80.85.112 – 10.80.85.112	10.80.85.112
114	10.80.85.113/32	10.80.85.113 – 10.80.85.113	10.80.85.113
115	10.80.85.114/32	10.80.85.114 – 10.80.85.114	10.80.85.114
116	10.80.85.115/32	10.80.85.115 – 10.80.85.115	10.80.85.115
117	10.80.85.116/32	10.80.85.116 – 10.80.85.116	10.80.85.116
118	10.80.85.117/32	10.80.85.117 – 10.80.85.117	10.80.85.117
119	10.80.85.118/32	10.80.85.118 – 10.80.85.118	10.80.85.118
120	10.80.85.119/32	10.80.85.119 – 10.80.85.119	10.80.85.119
121	10.80.85.120/32	10.80.85.120 – 10.80.85.120	10.80.85.120
122	10.80.85.121/32	10.80.85.121 – 10.80.85.121	10.80.85.121
123	10.80.85.122/32	10.80.85.122 – 10.80.85.122	10.80.85.122
124	10.80.85.123/32	10.80.85.123 – 10.80.85.123	10.80.85.123
125	10.80.85.124/32	10.80.85.124 – 10.80.85.124	10.80.85.124
126	10.80.85.125/32	10.80.85.125 – 10.80.85.125	10.80.85.125
127	10.80.85.126/32	10.80.85.126 – 10.80.85.126	10.80.85.126
128	10.80.85.127/32	10.80.85.127 – 10.80.85.127	10.80.85.127
129	10.80.85.128/32	10.80.85.128 – 10.80.85.128	10.80.85.128
130	10.80.85.129/32	10.80.85.129 – 10.80.85.129	10.80.85.129
131	10.80.85.130/32	10.80.85.130 – 10.80.85.130	10.80.85.130
132	10.80.85.131/32	10.80.85.131 – 10.80.85.131	10.80.85.131
133	10.80.85.132/32	10.80.85.132 – 10.80.85.132	10.80.85.132
134	10.80.85.133/32	10.80.85.133 – 10.80.85.133	10.80.85.133
135	10.80.85.134/32	10.80.85.134 – 10.80.85.134	10.80.85.134
136	10.80.85.135/32	10.80.85.135 – 10.80.85.135	10.80.85.135
137	10.80.85.136/32	10.80.85.136 – 10.80.85.136	10.80.85.136
138	10.80.85.137/32	10.80.85.137 – 10.80.85.137	10.80.85.137
139	10.80.85.138/32	10.80.85.138 – 10.80.85.138	10.80.85.138
140	10.80.85.139/32	10.80.85.139 – 10.80.85.139	10.80.85.139
141	10.80.85.140/32	10.80.85.140 – 10.80.85.140	10.80.85.140
142	10.80.85.141/32	10.80.85.141 – 10.80.85.141	10.80.85.141
143	10.80.85.142/32	10.80.85.142 – 10.80.85.142	10.80.85.142
144	10.80.85.143/32	10.80.85.143 – 10.80.85.143	10.80.85.143
145	10.80.85.144/32	10.80.85.144 – 10.80.85.144	10.80.85.144
146	10.80.85.145/32	10.80.85.145 – 10.80.85.145	10.80.85.145
147	10.80.85.146/32	10.80.85.146 – 10.80.85.146	10.80.85.146
148	10.80.85.147/32	10.80.85.147 – 10.80.85.147	10.80.85.147
149	10.80.85.148/32	10.80.85.148 – 10.80.85.148	10.80.85.148
150	10.80.85.149/32	10.80.85.149 – 10.80.85.149	10.80.85.149
151	10.80.85.150/32	10.80.85.150 – 10.80.85.150	10.80.85.150
152	10.80.85.151/32	10.80.85.151 – 10.80.85.151	10.80.85.151
153	10.80.85.152/32	10.80.85.152 – 10.80.85.152	10.80.85.152
154	10.80.85.153/32	10.80.85.153 – 10.80.85.153	10.80.85.153
155	10.80.85.154/32	10.80.85.154 – 10.80.85.154	10.80.85.154
156	10.80.85.155/32	10.80.85.155 – 10.80.85.155	10.80.85.155
157	10.80.85.156/32	10.80.85.156 – 10.80.85.156	10.80.85.156
158	10.80.85.157/32	10.80.85.157 – 10.80.85.157	10.80.85.157
159	10.80.85.158/32	10.80.85.158 – 10.80.85.158	10.80.85.158
160	10.80.85.159/32	10.80.85.159 – 10.80.85.159	10.80.85.159
161	10.80.85.160/32	10.80.85.160 – 10.80.85.160	10.80.85.160
162	10.80.85.161/32	10.80.85.161 – 10.80.85.161	10.80.85.161
163	10.80.85.162/32	10.80.85.162 – 10.80.85.162	10.80.85.162
164	10.80.85.163/32	10.80.85.163 – 10.80.85.163	10.80.85.163
165	10.80.85.164/32	10.80.85.164 – 10.80.85.164	10.80.85.164
166	10.80.85.165/32	10.80.85.165 – 10.80.85.165	10.80.85.165
167	10.80.85.166/32	10.80.85.166 – 10.80.85.166	10.80.85.166
168	10.80.85.167/32	10.80.85.167 – 10.80.85.167	10.80.85.167
169	10.80.85.168/32	10.80.85.168 – 10.80.85.168	10.80.85.168
170	10.80.85.169/32	10.80.85.169 – 10.80.85.169	10.80.85.169
171	10.80.85.170/32	10.80.85.170 – 10.80.85.170	10.80.85.170
172	10.80.85.171/32	10.80.85.171 – 10.80.85.171	10.80.85.171
173	10.80.85.172/32	10.80.85.172 – 10.80.85.172	10.80.85.172
174	10.80.85.173/32	10.80.85.173 – 10.80.85.173	10.80.85.173
175	10.80.85.174/32	10.80.85.174 – 10.80.85.174	10.80.85.174
176	10.80.85.175/32	10.80.85.175 – 10.80.85.175	10.80.85.175
177	10.80.85.176/32	10.80.85.176 – 10.80.85.176	10.80.85.176
178	10.80.85.177/32	10.80.85.177 – 10.80.85.177	10.80.85.177
179	10.80.85.178/32	10.80.85.178 – 10.80.85.178	10.80.85.178
180	10.80.85.179/32	10.80.85.179 – 10.80.85.179	10.80.85.179
181	10.80.85.180/32	10.80.85.180 – 10.80.85.180	10.80.85.180
182	10.80.85.181/32	10.80.85.181 – 10.80.85.181	10.80.85.181
183	10.80.85.182/32	10.80.85.182 – 10.80.85.182	10.80.85.182
184	10.80.85.183/32	10.80.85.183 – 10.80.85.183	10.80.85.183
185	10.80.85.184/32	10.80.85.184 – 10.80.85.184	10.80.85.184
186	10.80.85.185/32	10.80.85.185 – 10.80.85.185	10.80.85.185
187	10.80.85.186/32	10.80.85.186 – 10.80.85.186	10.80.85.186
188	10.80.85.187/32	10.80.85.187 – 10.80.85.187	10.80.85.187
189	10.80.85.188/32	10.80.85.188 – 10.80.85.188	10.80.85.188
190	10.80.85.189/32	10.80.85.189 – 10.80.85.189	10.80.85.189
191	10.80.85.190/32	10.80.85.190 – 10.80.85.190	10.80.85.190
192	10.80.85.191/32	10.80.85.191 – 10.80.85.191	10.80.85.191
193	10.80.85.192/32	10.80.85.192 – 10.80.85.192	10.80.85.192
194	10.80.85.193/32	10.80.85.193 – 10.80.85.193	10.80.85.193
195	10.80.85.194/32	10.80.85.194 – 10.80.85.194	10.80.85.194
196	10.80.85.195/32	10.80.85.195 – 10.80.85.195	10.80.85.195
197	10.80.85.196/32	10.80.85.196 – 10.80.85.196	10.80.85.196
198	10.80.85.197/32	10.80.85.197 – 10.80.85.197	10.80.85.197
199	10.80.85.198/32	10.80.85.198 – 10.80.85.198	10.80.85.198
200	10.80.85.199/32	10.80.85.199 – 10.80.85.199	10.80.85.199
201	10.80.85.200/32	10.80.85.200 – 10.80.85.200	10.80.85.200
202	10.80.85.201/32	10.80.85.201 – 10.80.85.201	10.80.85.201
203	10.80.85.202/32	10.80.85.202 – 10.80.85.202	10.80.85.202
204	10.80.85.203/32	10.80.85.203 – 10.80.85.203	10.80.85.203
205	10.80.85.204/32	10.80.85.204 – 10.80.85.204	10.80.85.204
206	10.80.85.205/32	10.80.85.205 – 10.80.85.205	10.80.85.205
207	10.80.85.206/32	10.80.85.206 – 10.80.85.206	10.80.85.206
208	10.80.85.207/32	10.80.85.207 – 10.80.85.207	10.80.85.207
209	10.80.85.208/32	10.80.85.208 – 10.80.85.208	10.80.85.208
210	10.80.85.209/32	10.80.85.209 – 10.80.85.209	10.80.85.209
211	10.80.85.210/32	10.80.85.210 – 10.80.85.210	10.80.85.210
212	10.80.85.211/32	10.80.85.211 – 10.80.85.211	10.80.85.211
213	10.80.85.212/32	10.80.85.212 – 10.80.85.212	10.80.85.212
214	10.80.85.213/32	10.80.85.213 – 10.80.85.213	10.80.85.213
215	10.80.85.214/32	10.80.85.214 – 10.80.85.214	10.80.85.214
216	10.80.85.215/32	10.80.85.215 – 10.80.85.215	10.80.85.215
217	10.80.85.216/32	10.80.85.216 – 10.80.85.216	10.80.85.216
218	10.80.85.217/32	10.80.85.217 – 10.80.85.217	10.80.85.217
219	10.80.85.218/32	10.80.85.218 – 10.80.85.218	10.80.85.218
220	10.80.85.219/32	10.80.85.219 – 10.80.85.219	10.80.85.219
221	10.80.85.220/32	10.80.85.220 – 10.80.85.220	10.80.85.220
222	10.80.85.221/32	10.80.85.221 – 10.80.85.221	10.80.85.221
223	10.80.85.222/32	10.80.85.222 – 10.80.85.222	10.80.85.222
224	10.80.85.223/32	10.80.85.223 – 10.80.85.223	10.80.85.223
225	10.80.85.224/32	10.80.85.224 – 10.80.85.224	10.80.85.224
226	10.80.85.225/32	10.80.85.225 – 10.80.85.225	10.80.85.225
227	10.80.85.226/32	10.80.85.226 – 10.80.85.226	10.80.85.226
228	10.80.85.227/32	10.80.85.227 – 10.80.85.227	10.80.85.227
229	10.80.85.228/32	10.80.85.228 – 10.80.85.228	10.80.85.228
230	10.80.85.229/32	10.80.85.229 – 10.80.85.229	10.80.85.229
231	10.80.85.230/32	10.80.85.230 – 10.80.85.230	10.80.85.230
232	10.80.85.231/32	10.80.85.231 – 10.80.85.231	10.80.85.231
233	10.80.85.232/32	10.80.85.232 – 10.80.85.232	10.80.85.232
234	10.80.85.233/32	10.80.85.233 – 10.80.85.233	10.80.85.233
235	10.80.85.234/32	10.80.85.234 – 10.80.85.234	10.80.85.234
236	10.80.85.235/32	10.80.85.235 – 10.80.85.235	10.80.85.235
237	10.80.85.236/32	10.80.85.236 – 10.80.85.236	10.80.85.236
238	10.80.85.237/32	10.80.85.237 – 10.80.85.237	10.80.85.237
239	10.80.85.238/32	10.80.85.238 – 10.80.85.238	10.80.85.238
240	10.80.85.239/32	10.80.85.239 – 10.80.85.239	10.80.85.239
241	10.80.85.240/32	10.80.85.240 – 10.80.85.240	10.80.85.240
242	10.80.85.241/32	10.80.85.241 – 10.80.85.241	10.80.85.241
243	10.80.85.242/32	10.80.85.242 – 10.80.85.242	10.80.85.242
244	10.80.85.243/32	10.80.85.243 – 10.80.85.243	10.80.85.243
245	10.80.85.244/32	10.80.85.244 – 10.80.85.244	10.80.85.244
246	10.80.85.245/32	10.80.85.245 – 10.80.85.245	10.80.85.245
247	10.80.85.246/32	10.80.85.246 – 10.80.85.246	10.80.85.246
248	10.80.85.247/32	10.80.85.247 – 10.80.85.247	10.80.85.247
249	10.80.85.248/32	10.80.85.248 – 10.80.85.248	10.80.85.248
250	10.80.85.249/32	10.80.85.249 – 10.80.85.249	10.80.85.249
251	10.80.85.250/32	10.80.85.250 – 10.80.85.250	10.80.85.250
252	10.80.85.251/32	10.80.85.251 – 10.80.85.251	10.80.85.251
253	10.80.85.252/32	10.80.85.252 – 10.80.85.252	10.80.85.252
254	10.80.85.253/32	10.80.85.253 – 10.80.85.253	10.80.85.253
255	10.80.85.254/32	10.80.85.254 – 10.80.85.254	10.80.85.254
256	10.80.85.255/32	10.80.85.255 – 10.80.85.255	10.80.85.255

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 →