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)10.158.53.0/24

network10.158.53.0/24

broadcast10.158.53.255

first host10.158.53.1

last host10.158.53.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.158.53.0/24

address00001010.10011110.00110101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10011110.00110101.00000000

broadcast00001010.10011110.00110101.11111111

green = network part, grey = host part

hex0x0a9e3500

decimal178140416

reverse dns0.53.158.10.in-addr.arpa

ipv4-mapped::ffff:a9e:3500

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.158.53.0/32	10.158.53.0 – 10.158.53.0	10.158.53.0
2	10.158.53.1/32	10.158.53.1 – 10.158.53.1	10.158.53.1
3	10.158.53.2/32	10.158.53.2 – 10.158.53.2	10.158.53.2
4	10.158.53.3/32	10.158.53.3 – 10.158.53.3	10.158.53.3
5	10.158.53.4/32	10.158.53.4 – 10.158.53.4	10.158.53.4
6	10.158.53.5/32	10.158.53.5 – 10.158.53.5	10.158.53.5
7	10.158.53.6/32	10.158.53.6 – 10.158.53.6	10.158.53.6
8	10.158.53.7/32	10.158.53.7 – 10.158.53.7	10.158.53.7
9	10.158.53.8/32	10.158.53.8 – 10.158.53.8	10.158.53.8
10	10.158.53.9/32	10.158.53.9 – 10.158.53.9	10.158.53.9
11	10.158.53.10/32	10.158.53.10 – 10.158.53.10	10.158.53.10
12	10.158.53.11/32	10.158.53.11 – 10.158.53.11	10.158.53.11
13	10.158.53.12/32	10.158.53.12 – 10.158.53.12	10.158.53.12
14	10.158.53.13/32	10.158.53.13 – 10.158.53.13	10.158.53.13
15	10.158.53.14/32	10.158.53.14 – 10.158.53.14	10.158.53.14
16	10.158.53.15/32	10.158.53.15 – 10.158.53.15	10.158.53.15
17	10.158.53.16/32	10.158.53.16 – 10.158.53.16	10.158.53.16
18	10.158.53.17/32	10.158.53.17 – 10.158.53.17	10.158.53.17
19	10.158.53.18/32	10.158.53.18 – 10.158.53.18	10.158.53.18
20	10.158.53.19/32	10.158.53.19 – 10.158.53.19	10.158.53.19
21	10.158.53.20/32	10.158.53.20 – 10.158.53.20	10.158.53.20
22	10.158.53.21/32	10.158.53.21 – 10.158.53.21	10.158.53.21
23	10.158.53.22/32	10.158.53.22 – 10.158.53.22	10.158.53.22
24	10.158.53.23/32	10.158.53.23 – 10.158.53.23	10.158.53.23
25	10.158.53.24/32	10.158.53.24 – 10.158.53.24	10.158.53.24
26	10.158.53.25/32	10.158.53.25 – 10.158.53.25	10.158.53.25
27	10.158.53.26/32	10.158.53.26 – 10.158.53.26	10.158.53.26
28	10.158.53.27/32	10.158.53.27 – 10.158.53.27	10.158.53.27
29	10.158.53.28/32	10.158.53.28 – 10.158.53.28	10.158.53.28
30	10.158.53.29/32	10.158.53.29 – 10.158.53.29	10.158.53.29
31	10.158.53.30/32	10.158.53.30 – 10.158.53.30	10.158.53.30
32	10.158.53.31/32	10.158.53.31 – 10.158.53.31	10.158.53.31
33	10.158.53.32/32	10.158.53.32 – 10.158.53.32	10.158.53.32
34	10.158.53.33/32	10.158.53.33 – 10.158.53.33	10.158.53.33
35	10.158.53.34/32	10.158.53.34 – 10.158.53.34	10.158.53.34
36	10.158.53.35/32	10.158.53.35 – 10.158.53.35	10.158.53.35
37	10.158.53.36/32	10.158.53.36 – 10.158.53.36	10.158.53.36
38	10.158.53.37/32	10.158.53.37 – 10.158.53.37	10.158.53.37
39	10.158.53.38/32	10.158.53.38 – 10.158.53.38	10.158.53.38
40	10.158.53.39/32	10.158.53.39 – 10.158.53.39	10.158.53.39
41	10.158.53.40/32	10.158.53.40 – 10.158.53.40	10.158.53.40
42	10.158.53.41/32	10.158.53.41 – 10.158.53.41	10.158.53.41
43	10.158.53.42/32	10.158.53.42 – 10.158.53.42	10.158.53.42
44	10.158.53.43/32	10.158.53.43 – 10.158.53.43	10.158.53.43
45	10.158.53.44/32	10.158.53.44 – 10.158.53.44	10.158.53.44
46	10.158.53.45/32	10.158.53.45 – 10.158.53.45	10.158.53.45
47	10.158.53.46/32	10.158.53.46 – 10.158.53.46	10.158.53.46
48	10.158.53.47/32	10.158.53.47 – 10.158.53.47	10.158.53.47
49	10.158.53.48/32	10.158.53.48 – 10.158.53.48	10.158.53.48
50	10.158.53.49/32	10.158.53.49 – 10.158.53.49	10.158.53.49
51	10.158.53.50/32	10.158.53.50 – 10.158.53.50	10.158.53.50
52	10.158.53.51/32	10.158.53.51 – 10.158.53.51	10.158.53.51
53	10.158.53.52/32	10.158.53.52 – 10.158.53.52	10.158.53.52
54	10.158.53.53/32	10.158.53.53 – 10.158.53.53	10.158.53.53
55	10.158.53.54/32	10.158.53.54 – 10.158.53.54	10.158.53.54
56	10.158.53.55/32	10.158.53.55 – 10.158.53.55	10.158.53.55
57	10.158.53.56/32	10.158.53.56 – 10.158.53.56	10.158.53.56
58	10.158.53.57/32	10.158.53.57 – 10.158.53.57	10.158.53.57
59	10.158.53.58/32	10.158.53.58 – 10.158.53.58	10.158.53.58
60	10.158.53.59/32	10.158.53.59 – 10.158.53.59	10.158.53.59
61	10.158.53.60/32	10.158.53.60 – 10.158.53.60	10.158.53.60
62	10.158.53.61/32	10.158.53.61 – 10.158.53.61	10.158.53.61
63	10.158.53.62/32	10.158.53.62 – 10.158.53.62	10.158.53.62
64	10.158.53.63/32	10.158.53.63 – 10.158.53.63	10.158.53.63
65	10.158.53.64/32	10.158.53.64 – 10.158.53.64	10.158.53.64
66	10.158.53.65/32	10.158.53.65 – 10.158.53.65	10.158.53.65
67	10.158.53.66/32	10.158.53.66 – 10.158.53.66	10.158.53.66
68	10.158.53.67/32	10.158.53.67 – 10.158.53.67	10.158.53.67
69	10.158.53.68/32	10.158.53.68 – 10.158.53.68	10.158.53.68
70	10.158.53.69/32	10.158.53.69 – 10.158.53.69	10.158.53.69
71	10.158.53.70/32	10.158.53.70 – 10.158.53.70	10.158.53.70
72	10.158.53.71/32	10.158.53.71 – 10.158.53.71	10.158.53.71
73	10.158.53.72/32	10.158.53.72 – 10.158.53.72	10.158.53.72
74	10.158.53.73/32	10.158.53.73 – 10.158.53.73	10.158.53.73
75	10.158.53.74/32	10.158.53.74 – 10.158.53.74	10.158.53.74
76	10.158.53.75/32	10.158.53.75 – 10.158.53.75	10.158.53.75
77	10.158.53.76/32	10.158.53.76 – 10.158.53.76	10.158.53.76
78	10.158.53.77/32	10.158.53.77 – 10.158.53.77	10.158.53.77
79	10.158.53.78/32	10.158.53.78 – 10.158.53.78	10.158.53.78
80	10.158.53.79/32	10.158.53.79 – 10.158.53.79	10.158.53.79
81	10.158.53.80/32	10.158.53.80 – 10.158.53.80	10.158.53.80
82	10.158.53.81/32	10.158.53.81 – 10.158.53.81	10.158.53.81
83	10.158.53.82/32	10.158.53.82 – 10.158.53.82	10.158.53.82
84	10.158.53.83/32	10.158.53.83 – 10.158.53.83	10.158.53.83
85	10.158.53.84/32	10.158.53.84 – 10.158.53.84	10.158.53.84
86	10.158.53.85/32	10.158.53.85 – 10.158.53.85	10.158.53.85
87	10.158.53.86/32	10.158.53.86 – 10.158.53.86	10.158.53.86
88	10.158.53.87/32	10.158.53.87 – 10.158.53.87	10.158.53.87
89	10.158.53.88/32	10.158.53.88 – 10.158.53.88	10.158.53.88
90	10.158.53.89/32	10.158.53.89 – 10.158.53.89	10.158.53.89
91	10.158.53.90/32	10.158.53.90 – 10.158.53.90	10.158.53.90
92	10.158.53.91/32	10.158.53.91 – 10.158.53.91	10.158.53.91
93	10.158.53.92/32	10.158.53.92 – 10.158.53.92	10.158.53.92
94	10.158.53.93/32	10.158.53.93 – 10.158.53.93	10.158.53.93
95	10.158.53.94/32	10.158.53.94 – 10.158.53.94	10.158.53.94
96	10.158.53.95/32	10.158.53.95 – 10.158.53.95	10.158.53.95
97	10.158.53.96/32	10.158.53.96 – 10.158.53.96	10.158.53.96
98	10.158.53.97/32	10.158.53.97 – 10.158.53.97	10.158.53.97
99	10.158.53.98/32	10.158.53.98 – 10.158.53.98	10.158.53.98
100	10.158.53.99/32	10.158.53.99 – 10.158.53.99	10.158.53.99
101	10.158.53.100/32	10.158.53.100 – 10.158.53.100	10.158.53.100
102	10.158.53.101/32	10.158.53.101 – 10.158.53.101	10.158.53.101
103	10.158.53.102/32	10.158.53.102 – 10.158.53.102	10.158.53.102
104	10.158.53.103/32	10.158.53.103 – 10.158.53.103	10.158.53.103
105	10.158.53.104/32	10.158.53.104 – 10.158.53.104	10.158.53.104
106	10.158.53.105/32	10.158.53.105 – 10.158.53.105	10.158.53.105
107	10.158.53.106/32	10.158.53.106 – 10.158.53.106	10.158.53.106
108	10.158.53.107/32	10.158.53.107 – 10.158.53.107	10.158.53.107
109	10.158.53.108/32	10.158.53.108 – 10.158.53.108	10.158.53.108
110	10.158.53.109/32	10.158.53.109 – 10.158.53.109	10.158.53.109
111	10.158.53.110/32	10.158.53.110 – 10.158.53.110	10.158.53.110
112	10.158.53.111/32	10.158.53.111 – 10.158.53.111	10.158.53.111
113	10.158.53.112/32	10.158.53.112 – 10.158.53.112	10.158.53.112
114	10.158.53.113/32	10.158.53.113 – 10.158.53.113	10.158.53.113
115	10.158.53.114/32	10.158.53.114 – 10.158.53.114	10.158.53.114
116	10.158.53.115/32	10.158.53.115 – 10.158.53.115	10.158.53.115
117	10.158.53.116/32	10.158.53.116 – 10.158.53.116	10.158.53.116
118	10.158.53.117/32	10.158.53.117 – 10.158.53.117	10.158.53.117
119	10.158.53.118/32	10.158.53.118 – 10.158.53.118	10.158.53.118
120	10.158.53.119/32	10.158.53.119 – 10.158.53.119	10.158.53.119
121	10.158.53.120/32	10.158.53.120 – 10.158.53.120	10.158.53.120
122	10.158.53.121/32	10.158.53.121 – 10.158.53.121	10.158.53.121
123	10.158.53.122/32	10.158.53.122 – 10.158.53.122	10.158.53.122
124	10.158.53.123/32	10.158.53.123 – 10.158.53.123	10.158.53.123
125	10.158.53.124/32	10.158.53.124 – 10.158.53.124	10.158.53.124
126	10.158.53.125/32	10.158.53.125 – 10.158.53.125	10.158.53.125
127	10.158.53.126/32	10.158.53.126 – 10.158.53.126	10.158.53.126
128	10.158.53.127/32	10.158.53.127 – 10.158.53.127	10.158.53.127
129	10.158.53.128/32	10.158.53.128 – 10.158.53.128	10.158.53.128
130	10.158.53.129/32	10.158.53.129 – 10.158.53.129	10.158.53.129
131	10.158.53.130/32	10.158.53.130 – 10.158.53.130	10.158.53.130
132	10.158.53.131/32	10.158.53.131 – 10.158.53.131	10.158.53.131
133	10.158.53.132/32	10.158.53.132 – 10.158.53.132	10.158.53.132
134	10.158.53.133/32	10.158.53.133 – 10.158.53.133	10.158.53.133
135	10.158.53.134/32	10.158.53.134 – 10.158.53.134	10.158.53.134
136	10.158.53.135/32	10.158.53.135 – 10.158.53.135	10.158.53.135
137	10.158.53.136/32	10.158.53.136 – 10.158.53.136	10.158.53.136
138	10.158.53.137/32	10.158.53.137 – 10.158.53.137	10.158.53.137
139	10.158.53.138/32	10.158.53.138 – 10.158.53.138	10.158.53.138
140	10.158.53.139/32	10.158.53.139 – 10.158.53.139	10.158.53.139
141	10.158.53.140/32	10.158.53.140 – 10.158.53.140	10.158.53.140
142	10.158.53.141/32	10.158.53.141 – 10.158.53.141	10.158.53.141
143	10.158.53.142/32	10.158.53.142 – 10.158.53.142	10.158.53.142
144	10.158.53.143/32	10.158.53.143 – 10.158.53.143	10.158.53.143
145	10.158.53.144/32	10.158.53.144 – 10.158.53.144	10.158.53.144
146	10.158.53.145/32	10.158.53.145 – 10.158.53.145	10.158.53.145
147	10.158.53.146/32	10.158.53.146 – 10.158.53.146	10.158.53.146
148	10.158.53.147/32	10.158.53.147 – 10.158.53.147	10.158.53.147
149	10.158.53.148/32	10.158.53.148 – 10.158.53.148	10.158.53.148
150	10.158.53.149/32	10.158.53.149 – 10.158.53.149	10.158.53.149
151	10.158.53.150/32	10.158.53.150 – 10.158.53.150	10.158.53.150
152	10.158.53.151/32	10.158.53.151 – 10.158.53.151	10.158.53.151
153	10.158.53.152/32	10.158.53.152 – 10.158.53.152	10.158.53.152
154	10.158.53.153/32	10.158.53.153 – 10.158.53.153	10.158.53.153
155	10.158.53.154/32	10.158.53.154 – 10.158.53.154	10.158.53.154
156	10.158.53.155/32	10.158.53.155 – 10.158.53.155	10.158.53.155
157	10.158.53.156/32	10.158.53.156 – 10.158.53.156	10.158.53.156
158	10.158.53.157/32	10.158.53.157 – 10.158.53.157	10.158.53.157
159	10.158.53.158/32	10.158.53.158 – 10.158.53.158	10.158.53.158
160	10.158.53.159/32	10.158.53.159 – 10.158.53.159	10.158.53.159
161	10.158.53.160/32	10.158.53.160 – 10.158.53.160	10.158.53.160
162	10.158.53.161/32	10.158.53.161 – 10.158.53.161	10.158.53.161
163	10.158.53.162/32	10.158.53.162 – 10.158.53.162	10.158.53.162
164	10.158.53.163/32	10.158.53.163 – 10.158.53.163	10.158.53.163
165	10.158.53.164/32	10.158.53.164 – 10.158.53.164	10.158.53.164
166	10.158.53.165/32	10.158.53.165 – 10.158.53.165	10.158.53.165
167	10.158.53.166/32	10.158.53.166 – 10.158.53.166	10.158.53.166
168	10.158.53.167/32	10.158.53.167 – 10.158.53.167	10.158.53.167
169	10.158.53.168/32	10.158.53.168 – 10.158.53.168	10.158.53.168
170	10.158.53.169/32	10.158.53.169 – 10.158.53.169	10.158.53.169
171	10.158.53.170/32	10.158.53.170 – 10.158.53.170	10.158.53.170
172	10.158.53.171/32	10.158.53.171 – 10.158.53.171	10.158.53.171
173	10.158.53.172/32	10.158.53.172 – 10.158.53.172	10.158.53.172
174	10.158.53.173/32	10.158.53.173 – 10.158.53.173	10.158.53.173
175	10.158.53.174/32	10.158.53.174 – 10.158.53.174	10.158.53.174
176	10.158.53.175/32	10.158.53.175 – 10.158.53.175	10.158.53.175
177	10.158.53.176/32	10.158.53.176 – 10.158.53.176	10.158.53.176
178	10.158.53.177/32	10.158.53.177 – 10.158.53.177	10.158.53.177
179	10.158.53.178/32	10.158.53.178 – 10.158.53.178	10.158.53.178
180	10.158.53.179/32	10.158.53.179 – 10.158.53.179	10.158.53.179
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200	10.158.53.199/32	10.158.53.199 – 10.158.53.199	10.158.53.199
201	10.158.53.200/32	10.158.53.200 – 10.158.53.200	10.158.53.200
202	10.158.53.201/32	10.158.53.201 – 10.158.53.201	10.158.53.201
203	10.158.53.202/32	10.158.53.202 – 10.158.53.202	10.158.53.202
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205	10.158.53.204/32	10.158.53.204 – 10.158.53.204	10.158.53.204
206	10.158.53.205/32	10.158.53.205 – 10.158.53.205	10.158.53.205
207	10.158.53.206/32	10.158.53.206 – 10.158.53.206	10.158.53.206
208	10.158.53.207/32	10.158.53.207 – 10.158.53.207	10.158.53.207
209	10.158.53.208/32	10.158.53.208 – 10.158.53.208	10.158.53.208
210	10.158.53.209/32	10.158.53.209 – 10.158.53.209	10.158.53.209
211	10.158.53.210/32	10.158.53.210 – 10.158.53.210	10.158.53.210
212	10.158.53.211/32	10.158.53.211 – 10.158.53.211	10.158.53.211
213	10.158.53.212/32	10.158.53.212 – 10.158.53.212	10.158.53.212
214	10.158.53.213/32	10.158.53.213 – 10.158.53.213	10.158.53.213
215	10.158.53.214/32	10.158.53.214 – 10.158.53.214	10.158.53.214
216	10.158.53.215/32	10.158.53.215 – 10.158.53.215	10.158.53.215
217	10.158.53.216/32	10.158.53.216 – 10.158.53.216	10.158.53.216
218	10.158.53.217/32	10.158.53.217 – 10.158.53.217	10.158.53.217
219	10.158.53.218/32	10.158.53.218 – 10.158.53.218	10.158.53.218
220	10.158.53.219/32	10.158.53.219 – 10.158.53.219	10.158.53.219
221	10.158.53.220/32	10.158.53.220 – 10.158.53.220	10.158.53.220
222	10.158.53.221/32	10.158.53.221 – 10.158.53.221	10.158.53.221
223	10.158.53.222/32	10.158.53.222 – 10.158.53.222	10.158.53.222
224	10.158.53.223/32	10.158.53.223 – 10.158.53.223	10.158.53.223
225	10.158.53.224/32	10.158.53.224 – 10.158.53.224	10.158.53.224
226	10.158.53.225/32	10.158.53.225 – 10.158.53.225	10.158.53.225
227	10.158.53.226/32	10.158.53.226 – 10.158.53.226	10.158.53.226
228	10.158.53.227/32	10.158.53.227 – 10.158.53.227	10.158.53.227
229	10.158.53.228/32	10.158.53.228 – 10.158.53.228	10.158.53.228
230	10.158.53.229/32	10.158.53.229 – 10.158.53.229	10.158.53.229
231	10.158.53.230/32	10.158.53.230 – 10.158.53.230	10.158.53.230
232	10.158.53.231/32	10.158.53.231 – 10.158.53.231	10.158.53.231
233	10.158.53.232/32	10.158.53.232 – 10.158.53.232	10.158.53.232
234	10.158.53.233/32	10.158.53.233 – 10.158.53.233	10.158.53.233
235	10.158.53.234/32	10.158.53.234 – 10.158.53.234	10.158.53.234
236	10.158.53.235/32	10.158.53.235 – 10.158.53.235	10.158.53.235
237	10.158.53.236/32	10.158.53.236 – 10.158.53.236	10.158.53.236
238	10.158.53.237/32	10.158.53.237 – 10.158.53.237	10.158.53.237
239	10.158.53.238/32	10.158.53.238 – 10.158.53.238	10.158.53.238
240	10.158.53.239/32	10.158.53.239 – 10.158.53.239	10.158.53.239
241	10.158.53.240/32	10.158.53.240 – 10.158.53.240	10.158.53.240
242	10.158.53.241/32	10.158.53.241 – 10.158.53.241	10.158.53.241
243	10.158.53.242/32	10.158.53.242 – 10.158.53.242	10.158.53.242
244	10.158.53.243/32	10.158.53.243 – 10.158.53.243	10.158.53.243
245	10.158.53.244/32	10.158.53.244 – 10.158.53.244	10.158.53.244
246	10.158.53.245/32	10.158.53.245 – 10.158.53.245	10.158.53.245
247	10.158.53.246/32	10.158.53.246 – 10.158.53.246	10.158.53.246
248	10.158.53.247/32	10.158.53.247 – 10.158.53.247	10.158.53.247
249	10.158.53.248/32	10.158.53.248 – 10.158.53.248	10.158.53.248
250	10.158.53.249/32	10.158.53.249 – 10.158.53.249	10.158.53.249
251	10.158.53.250/32	10.158.53.250 – 10.158.53.250	10.158.53.250
252	10.158.53.251/32	10.158.53.251 – 10.158.53.251	10.158.53.251
253	10.158.53.252/32	10.158.53.252 – 10.158.53.252	10.158.53.252
254	10.158.53.253/32	10.158.53.253 – 10.158.53.253	10.158.53.253
255	10.158.53.254/32	10.158.53.254 – 10.158.53.254	10.158.53.254
256	10.158.53.255/32	10.158.53.255 – 10.158.53.255	10.158.53.255

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 →