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)10.80.1.0/24

network10.80.1.0/24

broadcast10.80.1.255

first host10.80.1.1

last host10.80.1.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.80.1.0/24

address00001010.01010000.00000001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01010000.00000001.00000000

broadcast00001010.01010000.00000001.11111111

green = network part, grey = host part

hex0x0a500100

decimal173015296

reverse dns0.1.80.10.in-addr.arpa

ipv4-mapped::ffff:a50:100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.80.1.0/32	10.80.1.0 – 10.80.1.0	10.80.1.0
2	10.80.1.1/32	10.80.1.1 – 10.80.1.1	10.80.1.1
3	10.80.1.2/32	10.80.1.2 – 10.80.1.2	10.80.1.2
4	10.80.1.3/32	10.80.1.3 – 10.80.1.3	10.80.1.3
5	10.80.1.4/32	10.80.1.4 – 10.80.1.4	10.80.1.4
6	10.80.1.5/32	10.80.1.5 – 10.80.1.5	10.80.1.5
7	10.80.1.6/32	10.80.1.6 – 10.80.1.6	10.80.1.6
8	10.80.1.7/32	10.80.1.7 – 10.80.1.7	10.80.1.7
9	10.80.1.8/32	10.80.1.8 – 10.80.1.8	10.80.1.8
10	10.80.1.9/32	10.80.1.9 – 10.80.1.9	10.80.1.9
11	10.80.1.10/32	10.80.1.10 – 10.80.1.10	10.80.1.10
12	10.80.1.11/32	10.80.1.11 – 10.80.1.11	10.80.1.11
13	10.80.1.12/32	10.80.1.12 – 10.80.1.12	10.80.1.12
14	10.80.1.13/32	10.80.1.13 – 10.80.1.13	10.80.1.13
15	10.80.1.14/32	10.80.1.14 – 10.80.1.14	10.80.1.14
16	10.80.1.15/32	10.80.1.15 – 10.80.1.15	10.80.1.15
17	10.80.1.16/32	10.80.1.16 – 10.80.1.16	10.80.1.16
18	10.80.1.17/32	10.80.1.17 – 10.80.1.17	10.80.1.17
19	10.80.1.18/32	10.80.1.18 – 10.80.1.18	10.80.1.18
20	10.80.1.19/32	10.80.1.19 – 10.80.1.19	10.80.1.19
21	10.80.1.20/32	10.80.1.20 – 10.80.1.20	10.80.1.20
22	10.80.1.21/32	10.80.1.21 – 10.80.1.21	10.80.1.21
23	10.80.1.22/32	10.80.1.22 – 10.80.1.22	10.80.1.22
24	10.80.1.23/32	10.80.1.23 – 10.80.1.23	10.80.1.23
25	10.80.1.24/32	10.80.1.24 – 10.80.1.24	10.80.1.24
26	10.80.1.25/32	10.80.1.25 – 10.80.1.25	10.80.1.25
27	10.80.1.26/32	10.80.1.26 – 10.80.1.26	10.80.1.26
28	10.80.1.27/32	10.80.1.27 – 10.80.1.27	10.80.1.27
29	10.80.1.28/32	10.80.1.28 – 10.80.1.28	10.80.1.28
30	10.80.1.29/32	10.80.1.29 – 10.80.1.29	10.80.1.29
31	10.80.1.30/32	10.80.1.30 – 10.80.1.30	10.80.1.30
32	10.80.1.31/32	10.80.1.31 – 10.80.1.31	10.80.1.31
33	10.80.1.32/32	10.80.1.32 – 10.80.1.32	10.80.1.32
34	10.80.1.33/32	10.80.1.33 – 10.80.1.33	10.80.1.33
35	10.80.1.34/32	10.80.1.34 – 10.80.1.34	10.80.1.34
36	10.80.1.35/32	10.80.1.35 – 10.80.1.35	10.80.1.35
37	10.80.1.36/32	10.80.1.36 – 10.80.1.36	10.80.1.36
38	10.80.1.37/32	10.80.1.37 – 10.80.1.37	10.80.1.37
39	10.80.1.38/32	10.80.1.38 – 10.80.1.38	10.80.1.38
40	10.80.1.39/32	10.80.1.39 – 10.80.1.39	10.80.1.39
41	10.80.1.40/32	10.80.1.40 – 10.80.1.40	10.80.1.40
42	10.80.1.41/32	10.80.1.41 – 10.80.1.41	10.80.1.41
43	10.80.1.42/32	10.80.1.42 – 10.80.1.42	10.80.1.42
44	10.80.1.43/32	10.80.1.43 – 10.80.1.43	10.80.1.43
45	10.80.1.44/32	10.80.1.44 – 10.80.1.44	10.80.1.44
46	10.80.1.45/32	10.80.1.45 – 10.80.1.45	10.80.1.45
47	10.80.1.46/32	10.80.1.46 – 10.80.1.46	10.80.1.46
48	10.80.1.47/32	10.80.1.47 – 10.80.1.47	10.80.1.47
49	10.80.1.48/32	10.80.1.48 – 10.80.1.48	10.80.1.48
50	10.80.1.49/32	10.80.1.49 – 10.80.1.49	10.80.1.49
51	10.80.1.50/32	10.80.1.50 – 10.80.1.50	10.80.1.50
52	10.80.1.51/32	10.80.1.51 – 10.80.1.51	10.80.1.51
53	10.80.1.52/32	10.80.1.52 – 10.80.1.52	10.80.1.52
54	10.80.1.53/32	10.80.1.53 – 10.80.1.53	10.80.1.53
55	10.80.1.54/32	10.80.1.54 – 10.80.1.54	10.80.1.54
56	10.80.1.55/32	10.80.1.55 – 10.80.1.55	10.80.1.55
57	10.80.1.56/32	10.80.1.56 – 10.80.1.56	10.80.1.56
58	10.80.1.57/32	10.80.1.57 – 10.80.1.57	10.80.1.57
59	10.80.1.58/32	10.80.1.58 – 10.80.1.58	10.80.1.58
60	10.80.1.59/32	10.80.1.59 – 10.80.1.59	10.80.1.59
61	10.80.1.60/32	10.80.1.60 – 10.80.1.60	10.80.1.60
62	10.80.1.61/32	10.80.1.61 – 10.80.1.61	10.80.1.61
63	10.80.1.62/32	10.80.1.62 – 10.80.1.62	10.80.1.62
64	10.80.1.63/32	10.80.1.63 – 10.80.1.63	10.80.1.63
65	10.80.1.64/32	10.80.1.64 – 10.80.1.64	10.80.1.64
66	10.80.1.65/32	10.80.1.65 – 10.80.1.65	10.80.1.65
67	10.80.1.66/32	10.80.1.66 – 10.80.1.66	10.80.1.66
68	10.80.1.67/32	10.80.1.67 – 10.80.1.67	10.80.1.67
69	10.80.1.68/32	10.80.1.68 – 10.80.1.68	10.80.1.68
70	10.80.1.69/32	10.80.1.69 – 10.80.1.69	10.80.1.69
71	10.80.1.70/32	10.80.1.70 – 10.80.1.70	10.80.1.70
72	10.80.1.71/32	10.80.1.71 – 10.80.1.71	10.80.1.71
73	10.80.1.72/32	10.80.1.72 – 10.80.1.72	10.80.1.72
74	10.80.1.73/32	10.80.1.73 – 10.80.1.73	10.80.1.73
75	10.80.1.74/32	10.80.1.74 – 10.80.1.74	10.80.1.74
76	10.80.1.75/32	10.80.1.75 – 10.80.1.75	10.80.1.75
77	10.80.1.76/32	10.80.1.76 – 10.80.1.76	10.80.1.76
78	10.80.1.77/32	10.80.1.77 – 10.80.1.77	10.80.1.77
79	10.80.1.78/32	10.80.1.78 – 10.80.1.78	10.80.1.78
80	10.80.1.79/32	10.80.1.79 – 10.80.1.79	10.80.1.79
81	10.80.1.80/32	10.80.1.80 – 10.80.1.80	10.80.1.80
82	10.80.1.81/32	10.80.1.81 – 10.80.1.81	10.80.1.81
83	10.80.1.82/32	10.80.1.82 – 10.80.1.82	10.80.1.82
84	10.80.1.83/32	10.80.1.83 – 10.80.1.83	10.80.1.83
85	10.80.1.84/32	10.80.1.84 – 10.80.1.84	10.80.1.84
86	10.80.1.85/32	10.80.1.85 – 10.80.1.85	10.80.1.85
87	10.80.1.86/32	10.80.1.86 – 10.80.1.86	10.80.1.86
88	10.80.1.87/32	10.80.1.87 – 10.80.1.87	10.80.1.87
89	10.80.1.88/32	10.80.1.88 – 10.80.1.88	10.80.1.88
90	10.80.1.89/32	10.80.1.89 – 10.80.1.89	10.80.1.89
91	10.80.1.90/32	10.80.1.90 – 10.80.1.90	10.80.1.90
92	10.80.1.91/32	10.80.1.91 – 10.80.1.91	10.80.1.91
93	10.80.1.92/32	10.80.1.92 – 10.80.1.92	10.80.1.92
94	10.80.1.93/32	10.80.1.93 – 10.80.1.93	10.80.1.93
95	10.80.1.94/32	10.80.1.94 – 10.80.1.94	10.80.1.94
96	10.80.1.95/32	10.80.1.95 – 10.80.1.95	10.80.1.95
97	10.80.1.96/32	10.80.1.96 – 10.80.1.96	10.80.1.96
98	10.80.1.97/32	10.80.1.97 – 10.80.1.97	10.80.1.97
99	10.80.1.98/32	10.80.1.98 – 10.80.1.98	10.80.1.98
100	10.80.1.99/32	10.80.1.99 – 10.80.1.99	10.80.1.99
101	10.80.1.100/32	10.80.1.100 – 10.80.1.100	10.80.1.100
102	10.80.1.101/32	10.80.1.101 – 10.80.1.101	10.80.1.101
103	10.80.1.102/32	10.80.1.102 – 10.80.1.102	10.80.1.102
104	10.80.1.103/32	10.80.1.103 – 10.80.1.103	10.80.1.103
105	10.80.1.104/32	10.80.1.104 – 10.80.1.104	10.80.1.104
106	10.80.1.105/32	10.80.1.105 – 10.80.1.105	10.80.1.105
107	10.80.1.106/32	10.80.1.106 – 10.80.1.106	10.80.1.106
108	10.80.1.107/32	10.80.1.107 – 10.80.1.107	10.80.1.107
109	10.80.1.108/32	10.80.1.108 – 10.80.1.108	10.80.1.108
110	10.80.1.109/32	10.80.1.109 – 10.80.1.109	10.80.1.109
111	10.80.1.110/32	10.80.1.110 – 10.80.1.110	10.80.1.110
112	10.80.1.111/32	10.80.1.111 – 10.80.1.111	10.80.1.111
113	10.80.1.112/32	10.80.1.112 – 10.80.1.112	10.80.1.112
114	10.80.1.113/32	10.80.1.113 – 10.80.1.113	10.80.1.113
115	10.80.1.114/32	10.80.1.114 – 10.80.1.114	10.80.1.114
116	10.80.1.115/32	10.80.1.115 – 10.80.1.115	10.80.1.115
117	10.80.1.116/32	10.80.1.116 – 10.80.1.116	10.80.1.116
118	10.80.1.117/32	10.80.1.117 – 10.80.1.117	10.80.1.117
119	10.80.1.118/32	10.80.1.118 – 10.80.1.118	10.80.1.118
120	10.80.1.119/32	10.80.1.119 – 10.80.1.119	10.80.1.119
121	10.80.1.120/32	10.80.1.120 – 10.80.1.120	10.80.1.120
122	10.80.1.121/32	10.80.1.121 – 10.80.1.121	10.80.1.121
123	10.80.1.122/32	10.80.1.122 – 10.80.1.122	10.80.1.122
124	10.80.1.123/32	10.80.1.123 – 10.80.1.123	10.80.1.123
125	10.80.1.124/32	10.80.1.124 – 10.80.1.124	10.80.1.124
126	10.80.1.125/32	10.80.1.125 – 10.80.1.125	10.80.1.125
127	10.80.1.126/32	10.80.1.126 – 10.80.1.126	10.80.1.126
128	10.80.1.127/32	10.80.1.127 – 10.80.1.127	10.80.1.127
129	10.80.1.128/32	10.80.1.128 – 10.80.1.128	10.80.1.128
130	10.80.1.129/32	10.80.1.129 – 10.80.1.129	10.80.1.129
131	10.80.1.130/32	10.80.1.130 – 10.80.1.130	10.80.1.130
132	10.80.1.131/32	10.80.1.131 – 10.80.1.131	10.80.1.131
133	10.80.1.132/32	10.80.1.132 – 10.80.1.132	10.80.1.132
134	10.80.1.133/32	10.80.1.133 – 10.80.1.133	10.80.1.133
135	10.80.1.134/32	10.80.1.134 – 10.80.1.134	10.80.1.134
136	10.80.1.135/32	10.80.1.135 – 10.80.1.135	10.80.1.135
137	10.80.1.136/32	10.80.1.136 – 10.80.1.136	10.80.1.136
138	10.80.1.137/32	10.80.1.137 – 10.80.1.137	10.80.1.137
139	10.80.1.138/32	10.80.1.138 – 10.80.1.138	10.80.1.138
140	10.80.1.139/32	10.80.1.139 – 10.80.1.139	10.80.1.139
141	10.80.1.140/32	10.80.1.140 – 10.80.1.140	10.80.1.140
142	10.80.1.141/32	10.80.1.141 – 10.80.1.141	10.80.1.141
143	10.80.1.142/32	10.80.1.142 – 10.80.1.142	10.80.1.142
144	10.80.1.143/32	10.80.1.143 – 10.80.1.143	10.80.1.143
145	10.80.1.144/32	10.80.1.144 – 10.80.1.144	10.80.1.144
146	10.80.1.145/32	10.80.1.145 – 10.80.1.145	10.80.1.145
147	10.80.1.146/32	10.80.1.146 – 10.80.1.146	10.80.1.146
148	10.80.1.147/32	10.80.1.147 – 10.80.1.147	10.80.1.147
149	10.80.1.148/32	10.80.1.148 – 10.80.1.148	10.80.1.148
150	10.80.1.149/32	10.80.1.149 – 10.80.1.149	10.80.1.149
151	10.80.1.150/32	10.80.1.150 – 10.80.1.150	10.80.1.150
152	10.80.1.151/32	10.80.1.151 – 10.80.1.151	10.80.1.151
153	10.80.1.152/32	10.80.1.152 – 10.80.1.152	10.80.1.152
154	10.80.1.153/32	10.80.1.153 – 10.80.1.153	10.80.1.153
155	10.80.1.154/32	10.80.1.154 – 10.80.1.154	10.80.1.154
156	10.80.1.155/32	10.80.1.155 – 10.80.1.155	10.80.1.155
157	10.80.1.156/32	10.80.1.156 – 10.80.1.156	10.80.1.156
158	10.80.1.157/32	10.80.1.157 – 10.80.1.157	10.80.1.157
159	10.80.1.158/32	10.80.1.158 – 10.80.1.158	10.80.1.158
160	10.80.1.159/32	10.80.1.159 – 10.80.1.159	10.80.1.159
161	10.80.1.160/32	10.80.1.160 – 10.80.1.160	10.80.1.160
162	10.80.1.161/32	10.80.1.161 – 10.80.1.161	10.80.1.161
163	10.80.1.162/32	10.80.1.162 – 10.80.1.162	10.80.1.162
164	10.80.1.163/32	10.80.1.163 – 10.80.1.163	10.80.1.163
165	10.80.1.164/32	10.80.1.164 – 10.80.1.164	10.80.1.164
166	10.80.1.165/32	10.80.1.165 – 10.80.1.165	10.80.1.165
167	10.80.1.166/32	10.80.1.166 – 10.80.1.166	10.80.1.166
168	10.80.1.167/32	10.80.1.167 – 10.80.1.167	10.80.1.167
169	10.80.1.168/32	10.80.1.168 – 10.80.1.168	10.80.1.168
170	10.80.1.169/32	10.80.1.169 – 10.80.1.169	10.80.1.169
171	10.80.1.170/32	10.80.1.170 – 10.80.1.170	10.80.1.170
172	10.80.1.171/32	10.80.1.171 – 10.80.1.171	10.80.1.171
173	10.80.1.172/32	10.80.1.172 – 10.80.1.172	10.80.1.172
174	10.80.1.173/32	10.80.1.173 – 10.80.1.173	10.80.1.173
175	10.80.1.174/32	10.80.1.174 – 10.80.1.174	10.80.1.174
176	10.80.1.175/32	10.80.1.175 – 10.80.1.175	10.80.1.175
177	10.80.1.176/32	10.80.1.176 – 10.80.1.176	10.80.1.176
178	10.80.1.177/32	10.80.1.177 – 10.80.1.177	10.80.1.177
179	10.80.1.178/32	10.80.1.178 – 10.80.1.178	10.80.1.178
180	10.80.1.179/32	10.80.1.179 – 10.80.1.179	10.80.1.179
181	10.80.1.180/32	10.80.1.180 – 10.80.1.180	10.80.1.180
182	10.80.1.181/32	10.80.1.181 – 10.80.1.181	10.80.1.181
183	10.80.1.182/32	10.80.1.182 – 10.80.1.182	10.80.1.182
184	10.80.1.183/32	10.80.1.183 – 10.80.1.183	10.80.1.183
185	10.80.1.184/32	10.80.1.184 – 10.80.1.184	10.80.1.184
186	10.80.1.185/32	10.80.1.185 – 10.80.1.185	10.80.1.185
187	10.80.1.186/32	10.80.1.186 – 10.80.1.186	10.80.1.186
188	10.80.1.187/32	10.80.1.187 – 10.80.1.187	10.80.1.187
189	10.80.1.188/32	10.80.1.188 – 10.80.1.188	10.80.1.188
190	10.80.1.189/32	10.80.1.189 – 10.80.1.189	10.80.1.189
191	10.80.1.190/32	10.80.1.190 – 10.80.1.190	10.80.1.190
192	10.80.1.191/32	10.80.1.191 – 10.80.1.191	10.80.1.191
193	10.80.1.192/32	10.80.1.192 – 10.80.1.192	10.80.1.192
194	10.80.1.193/32	10.80.1.193 – 10.80.1.193	10.80.1.193
195	10.80.1.194/32	10.80.1.194 – 10.80.1.194	10.80.1.194
196	10.80.1.195/32	10.80.1.195 – 10.80.1.195	10.80.1.195
197	10.80.1.196/32	10.80.1.196 – 10.80.1.196	10.80.1.196
198	10.80.1.197/32	10.80.1.197 – 10.80.1.197	10.80.1.197
199	10.80.1.198/32	10.80.1.198 – 10.80.1.198	10.80.1.198
200	10.80.1.199/32	10.80.1.199 – 10.80.1.199	10.80.1.199
201	10.80.1.200/32	10.80.1.200 – 10.80.1.200	10.80.1.200
202	10.80.1.201/32	10.80.1.201 – 10.80.1.201	10.80.1.201
203	10.80.1.202/32	10.80.1.202 – 10.80.1.202	10.80.1.202
204	10.80.1.203/32	10.80.1.203 – 10.80.1.203	10.80.1.203
205	10.80.1.204/32	10.80.1.204 – 10.80.1.204	10.80.1.204
206	10.80.1.205/32	10.80.1.205 – 10.80.1.205	10.80.1.205
207	10.80.1.206/32	10.80.1.206 – 10.80.1.206	10.80.1.206
208	10.80.1.207/32	10.80.1.207 – 10.80.1.207	10.80.1.207
209	10.80.1.208/32	10.80.1.208 – 10.80.1.208	10.80.1.208
210	10.80.1.209/32	10.80.1.209 – 10.80.1.209	10.80.1.209
211	10.80.1.210/32	10.80.1.210 – 10.80.1.210	10.80.1.210
212	10.80.1.211/32	10.80.1.211 – 10.80.1.211	10.80.1.211
213	10.80.1.212/32	10.80.1.212 – 10.80.1.212	10.80.1.212
214	10.80.1.213/32	10.80.1.213 – 10.80.1.213	10.80.1.213
215	10.80.1.214/32	10.80.1.214 – 10.80.1.214	10.80.1.214
216	10.80.1.215/32	10.80.1.215 – 10.80.1.215	10.80.1.215
217	10.80.1.216/32	10.80.1.216 – 10.80.1.216	10.80.1.216
218	10.80.1.217/32	10.80.1.217 – 10.80.1.217	10.80.1.217
219	10.80.1.218/32	10.80.1.218 – 10.80.1.218	10.80.1.218
220	10.80.1.219/32	10.80.1.219 – 10.80.1.219	10.80.1.219
221	10.80.1.220/32	10.80.1.220 – 10.80.1.220	10.80.1.220
222	10.80.1.221/32	10.80.1.221 – 10.80.1.221	10.80.1.221
223	10.80.1.222/32	10.80.1.222 – 10.80.1.222	10.80.1.222
224	10.80.1.223/32	10.80.1.223 – 10.80.1.223	10.80.1.223
225	10.80.1.224/32	10.80.1.224 – 10.80.1.224	10.80.1.224
226	10.80.1.225/32	10.80.1.225 – 10.80.1.225	10.80.1.225
227	10.80.1.226/32	10.80.1.226 – 10.80.1.226	10.80.1.226
228	10.80.1.227/32	10.80.1.227 – 10.80.1.227	10.80.1.227
229	10.80.1.228/32	10.80.1.228 – 10.80.1.228	10.80.1.228
230	10.80.1.229/32	10.80.1.229 – 10.80.1.229	10.80.1.229
231	10.80.1.230/32	10.80.1.230 – 10.80.1.230	10.80.1.230
232	10.80.1.231/32	10.80.1.231 – 10.80.1.231	10.80.1.231
233	10.80.1.232/32	10.80.1.232 – 10.80.1.232	10.80.1.232
234	10.80.1.233/32	10.80.1.233 – 10.80.1.233	10.80.1.233
235	10.80.1.234/32	10.80.1.234 – 10.80.1.234	10.80.1.234
236	10.80.1.235/32	10.80.1.235 – 10.80.1.235	10.80.1.235
237	10.80.1.236/32	10.80.1.236 – 10.80.1.236	10.80.1.236
238	10.80.1.237/32	10.80.1.237 – 10.80.1.237	10.80.1.237
239	10.80.1.238/32	10.80.1.238 – 10.80.1.238	10.80.1.238
240	10.80.1.239/32	10.80.1.239 – 10.80.1.239	10.80.1.239
241	10.80.1.240/32	10.80.1.240 – 10.80.1.240	10.80.1.240
242	10.80.1.241/32	10.80.1.241 – 10.80.1.241	10.80.1.241
243	10.80.1.242/32	10.80.1.242 – 10.80.1.242	10.80.1.242
244	10.80.1.243/32	10.80.1.243 – 10.80.1.243	10.80.1.243
245	10.80.1.244/32	10.80.1.244 – 10.80.1.244	10.80.1.244
246	10.80.1.245/32	10.80.1.245 – 10.80.1.245	10.80.1.245
247	10.80.1.246/32	10.80.1.246 – 10.80.1.246	10.80.1.246
248	10.80.1.247/32	10.80.1.247 – 10.80.1.247	10.80.1.247
249	10.80.1.248/32	10.80.1.248 – 10.80.1.248	10.80.1.248
250	10.80.1.249/32	10.80.1.249 – 10.80.1.249	10.80.1.249
251	10.80.1.250/32	10.80.1.250 – 10.80.1.250	10.80.1.250
252	10.80.1.251/32	10.80.1.251 – 10.80.1.251	10.80.1.251
253	10.80.1.252/32	10.80.1.252 – 10.80.1.252	10.80.1.252
254	10.80.1.253/32	10.80.1.253 – 10.80.1.253	10.80.1.253
255	10.80.1.254/32	10.80.1.254 – 10.80.1.254	10.80.1.254
256	10.80.1.255/32	10.80.1.255 – 10.80.1.255	10.80.1.255

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 →