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)10.2.92.0/24

network10.2.92.0/24

broadcast10.2.92.255

first host10.2.92.1

last host10.2.92.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.92.0/24

address00001010.00000010.01011100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.01011100.00000000

broadcast00001010.00000010.01011100.11111111

green = network part, grey = host part

hex0x0a025c00

decimal167926784

reverse dns0.92.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:5c00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.92.0/31	10.2.92.0 – 10.2.92.1	10.2.92.1
2	10.2.92.2/31	10.2.92.2 – 10.2.92.3	10.2.92.3
3	10.2.92.4/31	10.2.92.4 – 10.2.92.5	10.2.92.5
4	10.2.92.6/31	10.2.92.6 – 10.2.92.7	10.2.92.7
5	10.2.92.8/31	10.2.92.8 – 10.2.92.9	10.2.92.9
6	10.2.92.10/31	10.2.92.10 – 10.2.92.11	10.2.92.11
7	10.2.92.12/31	10.2.92.12 – 10.2.92.13	10.2.92.13
8	10.2.92.14/31	10.2.92.14 – 10.2.92.15	10.2.92.15
9	10.2.92.16/31	10.2.92.16 – 10.2.92.17	10.2.92.17
10	10.2.92.18/31	10.2.92.18 – 10.2.92.19	10.2.92.19
11	10.2.92.20/31	10.2.92.20 – 10.2.92.21	10.2.92.21
12	10.2.92.22/31	10.2.92.22 – 10.2.92.23	10.2.92.23
13	10.2.92.24/31	10.2.92.24 – 10.2.92.25	10.2.92.25
14	10.2.92.26/31	10.2.92.26 – 10.2.92.27	10.2.92.27
15	10.2.92.28/31	10.2.92.28 – 10.2.92.29	10.2.92.29
16	10.2.92.30/31	10.2.92.30 – 10.2.92.31	10.2.92.31
17	10.2.92.32/31	10.2.92.32 – 10.2.92.33	10.2.92.33
18	10.2.92.34/31	10.2.92.34 – 10.2.92.35	10.2.92.35
19	10.2.92.36/31	10.2.92.36 – 10.2.92.37	10.2.92.37
20	10.2.92.38/31	10.2.92.38 – 10.2.92.39	10.2.92.39
21	10.2.92.40/31	10.2.92.40 – 10.2.92.41	10.2.92.41
22	10.2.92.42/31	10.2.92.42 – 10.2.92.43	10.2.92.43
23	10.2.92.44/31	10.2.92.44 – 10.2.92.45	10.2.92.45
24	10.2.92.46/31	10.2.92.46 – 10.2.92.47	10.2.92.47
25	10.2.92.48/31	10.2.92.48 – 10.2.92.49	10.2.92.49
26	10.2.92.50/31	10.2.92.50 – 10.2.92.51	10.2.92.51
27	10.2.92.52/31	10.2.92.52 – 10.2.92.53	10.2.92.53
28	10.2.92.54/31	10.2.92.54 – 10.2.92.55	10.2.92.55
29	10.2.92.56/31	10.2.92.56 – 10.2.92.57	10.2.92.57
30	10.2.92.58/31	10.2.92.58 – 10.2.92.59	10.2.92.59
31	10.2.92.60/31	10.2.92.60 – 10.2.92.61	10.2.92.61
32	10.2.92.62/31	10.2.92.62 – 10.2.92.63	10.2.92.63
33	10.2.92.64/31	10.2.92.64 – 10.2.92.65	10.2.92.65
34	10.2.92.66/31	10.2.92.66 – 10.2.92.67	10.2.92.67
35	10.2.92.68/31	10.2.92.68 – 10.2.92.69	10.2.92.69
36	10.2.92.70/31	10.2.92.70 – 10.2.92.71	10.2.92.71
37	10.2.92.72/31	10.2.92.72 – 10.2.92.73	10.2.92.73
38	10.2.92.74/31	10.2.92.74 – 10.2.92.75	10.2.92.75
39	10.2.92.76/31	10.2.92.76 – 10.2.92.77	10.2.92.77
40	10.2.92.78/31	10.2.92.78 – 10.2.92.79	10.2.92.79
41	10.2.92.80/31	10.2.92.80 – 10.2.92.81	10.2.92.81
42	10.2.92.82/31	10.2.92.82 – 10.2.92.83	10.2.92.83
43	10.2.92.84/31	10.2.92.84 – 10.2.92.85	10.2.92.85
44	10.2.92.86/31	10.2.92.86 – 10.2.92.87	10.2.92.87
45	10.2.92.88/31	10.2.92.88 – 10.2.92.89	10.2.92.89
46	10.2.92.90/31	10.2.92.90 – 10.2.92.91	10.2.92.91
47	10.2.92.92/31	10.2.92.92 – 10.2.92.93	10.2.92.93
48	10.2.92.94/31	10.2.92.94 – 10.2.92.95	10.2.92.95
49	10.2.92.96/31	10.2.92.96 – 10.2.92.97	10.2.92.97
50	10.2.92.98/31	10.2.92.98 – 10.2.92.99	10.2.92.99
51	10.2.92.100/31	10.2.92.100 – 10.2.92.101	10.2.92.101
52	10.2.92.102/31	10.2.92.102 – 10.2.92.103	10.2.92.103
53	10.2.92.104/31	10.2.92.104 – 10.2.92.105	10.2.92.105
54	10.2.92.106/31	10.2.92.106 – 10.2.92.107	10.2.92.107
55	10.2.92.108/31	10.2.92.108 – 10.2.92.109	10.2.92.109
56	10.2.92.110/31	10.2.92.110 – 10.2.92.111	10.2.92.111
57	10.2.92.112/31	10.2.92.112 – 10.2.92.113	10.2.92.113
58	10.2.92.114/31	10.2.92.114 – 10.2.92.115	10.2.92.115
59	10.2.92.116/31	10.2.92.116 – 10.2.92.117	10.2.92.117
60	10.2.92.118/31	10.2.92.118 – 10.2.92.119	10.2.92.119
61	10.2.92.120/31	10.2.92.120 – 10.2.92.121	10.2.92.121
62	10.2.92.122/31	10.2.92.122 – 10.2.92.123	10.2.92.123
63	10.2.92.124/31	10.2.92.124 – 10.2.92.125	10.2.92.125
64	10.2.92.126/31	10.2.92.126 – 10.2.92.127	10.2.92.127
65	10.2.92.128/31	10.2.92.128 – 10.2.92.129	10.2.92.129
66	10.2.92.130/31	10.2.92.130 – 10.2.92.131	10.2.92.131
67	10.2.92.132/31	10.2.92.132 – 10.2.92.133	10.2.92.133
68	10.2.92.134/31	10.2.92.134 – 10.2.92.135	10.2.92.135
69	10.2.92.136/31	10.2.92.136 – 10.2.92.137	10.2.92.137
70	10.2.92.138/31	10.2.92.138 – 10.2.92.139	10.2.92.139
71	10.2.92.140/31	10.2.92.140 – 10.2.92.141	10.2.92.141
72	10.2.92.142/31	10.2.92.142 – 10.2.92.143	10.2.92.143
73	10.2.92.144/31	10.2.92.144 – 10.2.92.145	10.2.92.145
74	10.2.92.146/31	10.2.92.146 – 10.2.92.147	10.2.92.147
75	10.2.92.148/31	10.2.92.148 – 10.2.92.149	10.2.92.149
76	10.2.92.150/31	10.2.92.150 – 10.2.92.151	10.2.92.151
77	10.2.92.152/31	10.2.92.152 – 10.2.92.153	10.2.92.153
78	10.2.92.154/31	10.2.92.154 – 10.2.92.155	10.2.92.155
79	10.2.92.156/31	10.2.92.156 – 10.2.92.157	10.2.92.157
80	10.2.92.158/31	10.2.92.158 – 10.2.92.159	10.2.92.159
81	10.2.92.160/31	10.2.92.160 – 10.2.92.161	10.2.92.161
82	10.2.92.162/31	10.2.92.162 – 10.2.92.163	10.2.92.163
83	10.2.92.164/31	10.2.92.164 – 10.2.92.165	10.2.92.165
84	10.2.92.166/31	10.2.92.166 – 10.2.92.167	10.2.92.167
85	10.2.92.168/31	10.2.92.168 – 10.2.92.169	10.2.92.169
86	10.2.92.170/31	10.2.92.170 – 10.2.92.171	10.2.92.171
87	10.2.92.172/31	10.2.92.172 – 10.2.92.173	10.2.92.173
88	10.2.92.174/31	10.2.92.174 – 10.2.92.175	10.2.92.175
89	10.2.92.176/31	10.2.92.176 – 10.2.92.177	10.2.92.177
90	10.2.92.178/31	10.2.92.178 – 10.2.92.179	10.2.92.179
91	10.2.92.180/31	10.2.92.180 – 10.2.92.181	10.2.92.181
92	10.2.92.182/31	10.2.92.182 – 10.2.92.183	10.2.92.183
93	10.2.92.184/31	10.2.92.184 – 10.2.92.185	10.2.92.185
94	10.2.92.186/31	10.2.92.186 – 10.2.92.187	10.2.92.187
95	10.2.92.188/31	10.2.92.188 – 10.2.92.189	10.2.92.189
96	10.2.92.190/31	10.2.92.190 – 10.2.92.191	10.2.92.191
97	10.2.92.192/31	10.2.92.192 – 10.2.92.193	10.2.92.193
98	10.2.92.194/31	10.2.92.194 – 10.2.92.195	10.2.92.195
99	10.2.92.196/31	10.2.92.196 – 10.2.92.197	10.2.92.197
100	10.2.92.198/31	10.2.92.198 – 10.2.92.199	10.2.92.199
101	10.2.92.200/31	10.2.92.200 – 10.2.92.201	10.2.92.201
102	10.2.92.202/31	10.2.92.202 – 10.2.92.203	10.2.92.203
103	10.2.92.204/31	10.2.92.204 – 10.2.92.205	10.2.92.205
104	10.2.92.206/31	10.2.92.206 – 10.2.92.207	10.2.92.207
105	10.2.92.208/31	10.2.92.208 – 10.2.92.209	10.2.92.209
106	10.2.92.210/31	10.2.92.210 – 10.2.92.211	10.2.92.211
107	10.2.92.212/31	10.2.92.212 – 10.2.92.213	10.2.92.213
108	10.2.92.214/31	10.2.92.214 – 10.2.92.215	10.2.92.215
109	10.2.92.216/31	10.2.92.216 – 10.2.92.217	10.2.92.217
110	10.2.92.218/31	10.2.92.218 – 10.2.92.219	10.2.92.219
111	10.2.92.220/31	10.2.92.220 – 10.2.92.221	10.2.92.221
112	10.2.92.222/31	10.2.92.222 – 10.2.92.223	10.2.92.223
113	10.2.92.224/31	10.2.92.224 – 10.2.92.225	10.2.92.225
114	10.2.92.226/31	10.2.92.226 – 10.2.92.227	10.2.92.227
115	10.2.92.228/31	10.2.92.228 – 10.2.92.229	10.2.92.229
116	10.2.92.230/31	10.2.92.230 – 10.2.92.231	10.2.92.231
117	10.2.92.232/31	10.2.92.232 – 10.2.92.233	10.2.92.233
118	10.2.92.234/31	10.2.92.234 – 10.2.92.235	10.2.92.235
119	10.2.92.236/31	10.2.92.236 – 10.2.92.237	10.2.92.237
120	10.2.92.238/31	10.2.92.238 – 10.2.92.239	10.2.92.239
121	10.2.92.240/31	10.2.92.240 – 10.2.92.241	10.2.92.241
122	10.2.92.242/31	10.2.92.242 – 10.2.92.243	10.2.92.243
123	10.2.92.244/31	10.2.92.244 – 10.2.92.245	10.2.92.245
124	10.2.92.246/31	10.2.92.246 – 10.2.92.247	10.2.92.247
125	10.2.92.248/31	10.2.92.248 – 10.2.92.249	10.2.92.249
126	10.2.92.250/31	10.2.92.250 – 10.2.92.251	10.2.92.251
127	10.2.92.252/31	10.2.92.252 – 10.2.92.253	10.2.92.253
128	10.2.92.254/31	10.2.92.254 – 10.2.92.255	10.2.92.255

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 →