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)10.0.35.0/24

network10.0.35.0/24

broadcast10.0.35.255

first host10.0.35.1

last host10.0.35.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.35.0/24

address00001010.00000000.00100011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.00100011.00000000

broadcast00001010.00000000.00100011.11111111

green = network part, grey = host part

hex0x0a002300

decimal167781120

reverse dns0.35.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:2300

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.35.0/32	10.0.35.0 – 10.0.35.0	10.0.35.0
2	10.0.35.1/32	10.0.35.1 – 10.0.35.1	10.0.35.1
3	10.0.35.2/32	10.0.35.2 – 10.0.35.2	10.0.35.2
4	10.0.35.3/32	10.0.35.3 – 10.0.35.3	10.0.35.3
5	10.0.35.4/32	10.0.35.4 – 10.0.35.4	10.0.35.4
6	10.0.35.5/32	10.0.35.5 – 10.0.35.5	10.0.35.5
7	10.0.35.6/32	10.0.35.6 – 10.0.35.6	10.0.35.6
8	10.0.35.7/32	10.0.35.7 – 10.0.35.7	10.0.35.7
9	10.0.35.8/32	10.0.35.8 – 10.0.35.8	10.0.35.8
10	10.0.35.9/32	10.0.35.9 – 10.0.35.9	10.0.35.9
11	10.0.35.10/32	10.0.35.10 – 10.0.35.10	10.0.35.10
12	10.0.35.11/32	10.0.35.11 – 10.0.35.11	10.0.35.11
13	10.0.35.12/32	10.0.35.12 – 10.0.35.12	10.0.35.12
14	10.0.35.13/32	10.0.35.13 – 10.0.35.13	10.0.35.13
15	10.0.35.14/32	10.0.35.14 – 10.0.35.14	10.0.35.14
16	10.0.35.15/32	10.0.35.15 – 10.0.35.15	10.0.35.15
17	10.0.35.16/32	10.0.35.16 – 10.0.35.16	10.0.35.16
18	10.0.35.17/32	10.0.35.17 – 10.0.35.17	10.0.35.17
19	10.0.35.18/32	10.0.35.18 – 10.0.35.18	10.0.35.18
20	10.0.35.19/32	10.0.35.19 – 10.0.35.19	10.0.35.19
21	10.0.35.20/32	10.0.35.20 – 10.0.35.20	10.0.35.20
22	10.0.35.21/32	10.0.35.21 – 10.0.35.21	10.0.35.21
23	10.0.35.22/32	10.0.35.22 – 10.0.35.22	10.0.35.22
24	10.0.35.23/32	10.0.35.23 – 10.0.35.23	10.0.35.23
25	10.0.35.24/32	10.0.35.24 – 10.0.35.24	10.0.35.24
26	10.0.35.25/32	10.0.35.25 – 10.0.35.25	10.0.35.25
27	10.0.35.26/32	10.0.35.26 – 10.0.35.26	10.0.35.26
28	10.0.35.27/32	10.0.35.27 – 10.0.35.27	10.0.35.27
29	10.0.35.28/32	10.0.35.28 – 10.0.35.28	10.0.35.28
30	10.0.35.29/32	10.0.35.29 – 10.0.35.29	10.0.35.29
31	10.0.35.30/32	10.0.35.30 – 10.0.35.30	10.0.35.30
32	10.0.35.31/32	10.0.35.31 – 10.0.35.31	10.0.35.31
33	10.0.35.32/32	10.0.35.32 – 10.0.35.32	10.0.35.32
34	10.0.35.33/32	10.0.35.33 – 10.0.35.33	10.0.35.33
35	10.0.35.34/32	10.0.35.34 – 10.0.35.34	10.0.35.34
36	10.0.35.35/32	10.0.35.35 – 10.0.35.35	10.0.35.35
37	10.0.35.36/32	10.0.35.36 – 10.0.35.36	10.0.35.36
38	10.0.35.37/32	10.0.35.37 – 10.0.35.37	10.0.35.37
39	10.0.35.38/32	10.0.35.38 – 10.0.35.38	10.0.35.38
40	10.0.35.39/32	10.0.35.39 – 10.0.35.39	10.0.35.39
41	10.0.35.40/32	10.0.35.40 – 10.0.35.40	10.0.35.40
42	10.0.35.41/32	10.0.35.41 – 10.0.35.41	10.0.35.41
43	10.0.35.42/32	10.0.35.42 – 10.0.35.42	10.0.35.42
44	10.0.35.43/32	10.0.35.43 – 10.0.35.43	10.0.35.43
45	10.0.35.44/32	10.0.35.44 – 10.0.35.44	10.0.35.44
46	10.0.35.45/32	10.0.35.45 – 10.0.35.45	10.0.35.45
47	10.0.35.46/32	10.0.35.46 – 10.0.35.46	10.0.35.46
48	10.0.35.47/32	10.0.35.47 – 10.0.35.47	10.0.35.47
49	10.0.35.48/32	10.0.35.48 – 10.0.35.48	10.0.35.48
50	10.0.35.49/32	10.0.35.49 – 10.0.35.49	10.0.35.49
51	10.0.35.50/32	10.0.35.50 – 10.0.35.50	10.0.35.50
52	10.0.35.51/32	10.0.35.51 – 10.0.35.51	10.0.35.51
53	10.0.35.52/32	10.0.35.52 – 10.0.35.52	10.0.35.52
54	10.0.35.53/32	10.0.35.53 – 10.0.35.53	10.0.35.53
55	10.0.35.54/32	10.0.35.54 – 10.0.35.54	10.0.35.54
56	10.0.35.55/32	10.0.35.55 – 10.0.35.55	10.0.35.55
57	10.0.35.56/32	10.0.35.56 – 10.0.35.56	10.0.35.56
58	10.0.35.57/32	10.0.35.57 – 10.0.35.57	10.0.35.57
59	10.0.35.58/32	10.0.35.58 – 10.0.35.58	10.0.35.58
60	10.0.35.59/32	10.0.35.59 – 10.0.35.59	10.0.35.59
61	10.0.35.60/32	10.0.35.60 – 10.0.35.60	10.0.35.60
62	10.0.35.61/32	10.0.35.61 – 10.0.35.61	10.0.35.61
63	10.0.35.62/32	10.0.35.62 – 10.0.35.62	10.0.35.62
64	10.0.35.63/32	10.0.35.63 – 10.0.35.63	10.0.35.63
65	10.0.35.64/32	10.0.35.64 – 10.0.35.64	10.0.35.64
66	10.0.35.65/32	10.0.35.65 – 10.0.35.65	10.0.35.65
67	10.0.35.66/32	10.0.35.66 – 10.0.35.66	10.0.35.66
68	10.0.35.67/32	10.0.35.67 – 10.0.35.67	10.0.35.67
69	10.0.35.68/32	10.0.35.68 – 10.0.35.68	10.0.35.68
70	10.0.35.69/32	10.0.35.69 – 10.0.35.69	10.0.35.69
71	10.0.35.70/32	10.0.35.70 – 10.0.35.70	10.0.35.70
72	10.0.35.71/32	10.0.35.71 – 10.0.35.71	10.0.35.71
73	10.0.35.72/32	10.0.35.72 – 10.0.35.72	10.0.35.72
74	10.0.35.73/32	10.0.35.73 – 10.0.35.73	10.0.35.73
75	10.0.35.74/32	10.0.35.74 – 10.0.35.74	10.0.35.74
76	10.0.35.75/32	10.0.35.75 – 10.0.35.75	10.0.35.75
77	10.0.35.76/32	10.0.35.76 – 10.0.35.76	10.0.35.76
78	10.0.35.77/32	10.0.35.77 – 10.0.35.77	10.0.35.77
79	10.0.35.78/32	10.0.35.78 – 10.0.35.78	10.0.35.78
80	10.0.35.79/32	10.0.35.79 – 10.0.35.79	10.0.35.79
81	10.0.35.80/32	10.0.35.80 – 10.0.35.80	10.0.35.80
82	10.0.35.81/32	10.0.35.81 – 10.0.35.81	10.0.35.81
83	10.0.35.82/32	10.0.35.82 – 10.0.35.82	10.0.35.82
84	10.0.35.83/32	10.0.35.83 – 10.0.35.83	10.0.35.83
85	10.0.35.84/32	10.0.35.84 – 10.0.35.84	10.0.35.84
86	10.0.35.85/32	10.0.35.85 – 10.0.35.85	10.0.35.85
87	10.0.35.86/32	10.0.35.86 – 10.0.35.86	10.0.35.86
88	10.0.35.87/32	10.0.35.87 – 10.0.35.87	10.0.35.87
89	10.0.35.88/32	10.0.35.88 – 10.0.35.88	10.0.35.88
90	10.0.35.89/32	10.0.35.89 – 10.0.35.89	10.0.35.89
91	10.0.35.90/32	10.0.35.90 – 10.0.35.90	10.0.35.90
92	10.0.35.91/32	10.0.35.91 – 10.0.35.91	10.0.35.91
93	10.0.35.92/32	10.0.35.92 – 10.0.35.92	10.0.35.92
94	10.0.35.93/32	10.0.35.93 – 10.0.35.93	10.0.35.93
95	10.0.35.94/32	10.0.35.94 – 10.0.35.94	10.0.35.94
96	10.0.35.95/32	10.0.35.95 – 10.0.35.95	10.0.35.95
97	10.0.35.96/32	10.0.35.96 – 10.0.35.96	10.0.35.96
98	10.0.35.97/32	10.0.35.97 – 10.0.35.97	10.0.35.97
99	10.0.35.98/32	10.0.35.98 – 10.0.35.98	10.0.35.98
100	10.0.35.99/32	10.0.35.99 – 10.0.35.99	10.0.35.99
101	10.0.35.100/32	10.0.35.100 – 10.0.35.100	10.0.35.100
102	10.0.35.101/32	10.0.35.101 – 10.0.35.101	10.0.35.101
103	10.0.35.102/32	10.0.35.102 – 10.0.35.102	10.0.35.102
104	10.0.35.103/32	10.0.35.103 – 10.0.35.103	10.0.35.103
105	10.0.35.104/32	10.0.35.104 – 10.0.35.104	10.0.35.104
106	10.0.35.105/32	10.0.35.105 – 10.0.35.105	10.0.35.105
107	10.0.35.106/32	10.0.35.106 – 10.0.35.106	10.0.35.106
108	10.0.35.107/32	10.0.35.107 – 10.0.35.107	10.0.35.107
109	10.0.35.108/32	10.0.35.108 – 10.0.35.108	10.0.35.108
110	10.0.35.109/32	10.0.35.109 – 10.0.35.109	10.0.35.109
111	10.0.35.110/32	10.0.35.110 – 10.0.35.110	10.0.35.110
112	10.0.35.111/32	10.0.35.111 – 10.0.35.111	10.0.35.111
113	10.0.35.112/32	10.0.35.112 – 10.0.35.112	10.0.35.112
114	10.0.35.113/32	10.0.35.113 – 10.0.35.113	10.0.35.113
115	10.0.35.114/32	10.0.35.114 – 10.0.35.114	10.0.35.114
116	10.0.35.115/32	10.0.35.115 – 10.0.35.115	10.0.35.115
117	10.0.35.116/32	10.0.35.116 – 10.0.35.116	10.0.35.116
118	10.0.35.117/32	10.0.35.117 – 10.0.35.117	10.0.35.117
119	10.0.35.118/32	10.0.35.118 – 10.0.35.118	10.0.35.118
120	10.0.35.119/32	10.0.35.119 – 10.0.35.119	10.0.35.119
121	10.0.35.120/32	10.0.35.120 – 10.0.35.120	10.0.35.120
122	10.0.35.121/32	10.0.35.121 – 10.0.35.121	10.0.35.121
123	10.0.35.122/32	10.0.35.122 – 10.0.35.122	10.0.35.122
124	10.0.35.123/32	10.0.35.123 – 10.0.35.123	10.0.35.123
125	10.0.35.124/32	10.0.35.124 – 10.0.35.124	10.0.35.124
126	10.0.35.125/32	10.0.35.125 – 10.0.35.125	10.0.35.125
127	10.0.35.126/32	10.0.35.126 – 10.0.35.126	10.0.35.126
128	10.0.35.127/32	10.0.35.127 – 10.0.35.127	10.0.35.127
129	10.0.35.128/32	10.0.35.128 – 10.0.35.128	10.0.35.128
130	10.0.35.129/32	10.0.35.129 – 10.0.35.129	10.0.35.129
131	10.0.35.130/32	10.0.35.130 – 10.0.35.130	10.0.35.130
132	10.0.35.131/32	10.0.35.131 – 10.0.35.131	10.0.35.131
133	10.0.35.132/32	10.0.35.132 – 10.0.35.132	10.0.35.132
134	10.0.35.133/32	10.0.35.133 – 10.0.35.133	10.0.35.133
135	10.0.35.134/32	10.0.35.134 – 10.0.35.134	10.0.35.134
136	10.0.35.135/32	10.0.35.135 – 10.0.35.135	10.0.35.135
137	10.0.35.136/32	10.0.35.136 – 10.0.35.136	10.0.35.136
138	10.0.35.137/32	10.0.35.137 – 10.0.35.137	10.0.35.137
139	10.0.35.138/32	10.0.35.138 – 10.0.35.138	10.0.35.138
140	10.0.35.139/32	10.0.35.139 – 10.0.35.139	10.0.35.139
141	10.0.35.140/32	10.0.35.140 – 10.0.35.140	10.0.35.140
142	10.0.35.141/32	10.0.35.141 – 10.0.35.141	10.0.35.141
143	10.0.35.142/32	10.0.35.142 – 10.0.35.142	10.0.35.142
144	10.0.35.143/32	10.0.35.143 – 10.0.35.143	10.0.35.143
145	10.0.35.144/32	10.0.35.144 – 10.0.35.144	10.0.35.144
146	10.0.35.145/32	10.0.35.145 – 10.0.35.145	10.0.35.145
147	10.0.35.146/32	10.0.35.146 – 10.0.35.146	10.0.35.146
148	10.0.35.147/32	10.0.35.147 – 10.0.35.147	10.0.35.147
149	10.0.35.148/32	10.0.35.148 – 10.0.35.148	10.0.35.148
150	10.0.35.149/32	10.0.35.149 – 10.0.35.149	10.0.35.149
151	10.0.35.150/32	10.0.35.150 – 10.0.35.150	10.0.35.150
152	10.0.35.151/32	10.0.35.151 – 10.0.35.151	10.0.35.151
153	10.0.35.152/32	10.0.35.152 – 10.0.35.152	10.0.35.152
154	10.0.35.153/32	10.0.35.153 – 10.0.35.153	10.0.35.153
155	10.0.35.154/32	10.0.35.154 – 10.0.35.154	10.0.35.154
156	10.0.35.155/32	10.0.35.155 – 10.0.35.155	10.0.35.155
157	10.0.35.156/32	10.0.35.156 – 10.0.35.156	10.0.35.156
158	10.0.35.157/32	10.0.35.157 – 10.0.35.157	10.0.35.157
159	10.0.35.158/32	10.0.35.158 – 10.0.35.158	10.0.35.158
160	10.0.35.159/32	10.0.35.159 – 10.0.35.159	10.0.35.159
161	10.0.35.160/32	10.0.35.160 – 10.0.35.160	10.0.35.160
162	10.0.35.161/32	10.0.35.161 – 10.0.35.161	10.0.35.161
163	10.0.35.162/32	10.0.35.162 – 10.0.35.162	10.0.35.162
164	10.0.35.163/32	10.0.35.163 – 10.0.35.163	10.0.35.163
165	10.0.35.164/32	10.0.35.164 – 10.0.35.164	10.0.35.164
166	10.0.35.165/32	10.0.35.165 – 10.0.35.165	10.0.35.165
167	10.0.35.166/32	10.0.35.166 – 10.0.35.166	10.0.35.166
168	10.0.35.167/32	10.0.35.167 – 10.0.35.167	10.0.35.167
169	10.0.35.168/32	10.0.35.168 – 10.0.35.168	10.0.35.168
170	10.0.35.169/32	10.0.35.169 – 10.0.35.169	10.0.35.169
171	10.0.35.170/32	10.0.35.170 – 10.0.35.170	10.0.35.170
172	10.0.35.171/32	10.0.35.171 – 10.0.35.171	10.0.35.171
173	10.0.35.172/32	10.0.35.172 – 10.0.35.172	10.0.35.172
174	10.0.35.173/32	10.0.35.173 – 10.0.35.173	10.0.35.173
175	10.0.35.174/32	10.0.35.174 – 10.0.35.174	10.0.35.174
176	10.0.35.175/32	10.0.35.175 – 10.0.35.175	10.0.35.175
177	10.0.35.176/32	10.0.35.176 – 10.0.35.176	10.0.35.176
178	10.0.35.177/32	10.0.35.177 – 10.0.35.177	10.0.35.177
179	10.0.35.178/32	10.0.35.178 – 10.0.35.178	10.0.35.178
180	10.0.35.179/32	10.0.35.179 – 10.0.35.179	10.0.35.179
181	10.0.35.180/32	10.0.35.180 – 10.0.35.180	10.0.35.180
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183	10.0.35.182/32	10.0.35.182 – 10.0.35.182	10.0.35.182
184	10.0.35.183/32	10.0.35.183 – 10.0.35.183	10.0.35.183
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188	10.0.35.187/32	10.0.35.187 – 10.0.35.187	10.0.35.187
189	10.0.35.188/32	10.0.35.188 – 10.0.35.188	10.0.35.188
190	10.0.35.189/32	10.0.35.189 – 10.0.35.189	10.0.35.189
191	10.0.35.190/32	10.0.35.190 – 10.0.35.190	10.0.35.190
192	10.0.35.191/32	10.0.35.191 – 10.0.35.191	10.0.35.191
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197	10.0.35.196/32	10.0.35.196 – 10.0.35.196	10.0.35.196
198	10.0.35.197/32	10.0.35.197 – 10.0.35.197	10.0.35.197
199	10.0.35.198/32	10.0.35.198 – 10.0.35.198	10.0.35.198
200	10.0.35.199/32	10.0.35.199 – 10.0.35.199	10.0.35.199
201	10.0.35.200/32	10.0.35.200 – 10.0.35.200	10.0.35.200
202	10.0.35.201/32	10.0.35.201 – 10.0.35.201	10.0.35.201
203	10.0.35.202/32	10.0.35.202 – 10.0.35.202	10.0.35.202
204	10.0.35.203/32	10.0.35.203 – 10.0.35.203	10.0.35.203
205	10.0.35.204/32	10.0.35.204 – 10.0.35.204	10.0.35.204
206	10.0.35.205/32	10.0.35.205 – 10.0.35.205	10.0.35.205
207	10.0.35.206/32	10.0.35.206 – 10.0.35.206	10.0.35.206
208	10.0.35.207/32	10.0.35.207 – 10.0.35.207	10.0.35.207
209	10.0.35.208/32	10.0.35.208 – 10.0.35.208	10.0.35.208
210	10.0.35.209/32	10.0.35.209 – 10.0.35.209	10.0.35.209
211	10.0.35.210/32	10.0.35.210 – 10.0.35.210	10.0.35.210
212	10.0.35.211/32	10.0.35.211 – 10.0.35.211	10.0.35.211
213	10.0.35.212/32	10.0.35.212 – 10.0.35.212	10.0.35.212
214	10.0.35.213/32	10.0.35.213 – 10.0.35.213	10.0.35.213
215	10.0.35.214/32	10.0.35.214 – 10.0.35.214	10.0.35.214
216	10.0.35.215/32	10.0.35.215 – 10.0.35.215	10.0.35.215
217	10.0.35.216/32	10.0.35.216 – 10.0.35.216	10.0.35.216
218	10.0.35.217/32	10.0.35.217 – 10.0.35.217	10.0.35.217
219	10.0.35.218/32	10.0.35.218 – 10.0.35.218	10.0.35.218
220	10.0.35.219/32	10.0.35.219 – 10.0.35.219	10.0.35.219
221	10.0.35.220/32	10.0.35.220 – 10.0.35.220	10.0.35.220
222	10.0.35.221/32	10.0.35.221 – 10.0.35.221	10.0.35.221
223	10.0.35.222/32	10.0.35.222 – 10.0.35.222	10.0.35.222
224	10.0.35.223/32	10.0.35.223 – 10.0.35.223	10.0.35.223
225	10.0.35.224/32	10.0.35.224 – 10.0.35.224	10.0.35.224
226	10.0.35.225/32	10.0.35.225 – 10.0.35.225	10.0.35.225
227	10.0.35.226/32	10.0.35.226 – 10.0.35.226	10.0.35.226
228	10.0.35.227/32	10.0.35.227 – 10.0.35.227	10.0.35.227
229	10.0.35.228/32	10.0.35.228 – 10.0.35.228	10.0.35.228
230	10.0.35.229/32	10.0.35.229 – 10.0.35.229	10.0.35.229
231	10.0.35.230/32	10.0.35.230 – 10.0.35.230	10.0.35.230
232	10.0.35.231/32	10.0.35.231 – 10.0.35.231	10.0.35.231
233	10.0.35.232/32	10.0.35.232 – 10.0.35.232	10.0.35.232
234	10.0.35.233/32	10.0.35.233 – 10.0.35.233	10.0.35.233
235	10.0.35.234/32	10.0.35.234 – 10.0.35.234	10.0.35.234
236	10.0.35.235/32	10.0.35.235 – 10.0.35.235	10.0.35.235
237	10.0.35.236/32	10.0.35.236 – 10.0.35.236	10.0.35.236
238	10.0.35.237/32	10.0.35.237 – 10.0.35.237	10.0.35.237
239	10.0.35.238/32	10.0.35.238 – 10.0.35.238	10.0.35.238
240	10.0.35.239/32	10.0.35.239 – 10.0.35.239	10.0.35.239
241	10.0.35.240/32	10.0.35.240 – 10.0.35.240	10.0.35.240
242	10.0.35.241/32	10.0.35.241 – 10.0.35.241	10.0.35.241
243	10.0.35.242/32	10.0.35.242 – 10.0.35.242	10.0.35.242
244	10.0.35.243/32	10.0.35.243 – 10.0.35.243	10.0.35.243
245	10.0.35.244/32	10.0.35.244 – 10.0.35.244	10.0.35.244
246	10.0.35.245/32	10.0.35.245 – 10.0.35.245	10.0.35.245
247	10.0.35.246/32	10.0.35.246 – 10.0.35.246	10.0.35.246
248	10.0.35.247/32	10.0.35.247 – 10.0.35.247	10.0.35.247
249	10.0.35.248/32	10.0.35.248 – 10.0.35.248	10.0.35.248
250	10.0.35.249/32	10.0.35.249 – 10.0.35.249	10.0.35.249
251	10.0.35.250/32	10.0.35.250 – 10.0.35.250	10.0.35.250
252	10.0.35.251/32	10.0.35.251 – 10.0.35.251	10.0.35.251
253	10.0.35.252/32	10.0.35.252 – 10.0.35.252	10.0.35.252
254	10.0.35.253/32	10.0.35.253 – 10.0.35.253	10.0.35.253
255	10.0.35.254/32	10.0.35.254 – 10.0.35.254	10.0.35.254
256	10.0.35.255/32	10.0.35.255 – 10.0.35.255	10.0.35.255

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 →