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)10.0.234.0/24

network10.0.234.0/24

broadcast10.0.234.255

first host10.0.234.1

last host10.0.234.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.234.0/24

address00001010.00000000.11101010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11101010.00000000

broadcast00001010.00000000.11101010.11111111

green = network part, grey = host part

hex0x0a00ea00

decimal167832064

reverse dns0.234.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:ea00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.234.0/31	10.0.234.0 – 10.0.234.1	10.0.234.1
2	10.0.234.2/31	10.0.234.2 – 10.0.234.3	10.0.234.3
3	10.0.234.4/31	10.0.234.4 – 10.0.234.5	10.0.234.5
4	10.0.234.6/31	10.0.234.6 – 10.0.234.7	10.0.234.7
5	10.0.234.8/31	10.0.234.8 – 10.0.234.9	10.0.234.9
6	10.0.234.10/31	10.0.234.10 – 10.0.234.11	10.0.234.11
7	10.0.234.12/31	10.0.234.12 – 10.0.234.13	10.0.234.13
8	10.0.234.14/31	10.0.234.14 – 10.0.234.15	10.0.234.15
9	10.0.234.16/31	10.0.234.16 – 10.0.234.17	10.0.234.17
10	10.0.234.18/31	10.0.234.18 – 10.0.234.19	10.0.234.19
11	10.0.234.20/31	10.0.234.20 – 10.0.234.21	10.0.234.21
12	10.0.234.22/31	10.0.234.22 – 10.0.234.23	10.0.234.23
13	10.0.234.24/31	10.0.234.24 – 10.0.234.25	10.0.234.25
14	10.0.234.26/31	10.0.234.26 – 10.0.234.27	10.0.234.27
15	10.0.234.28/31	10.0.234.28 – 10.0.234.29	10.0.234.29
16	10.0.234.30/31	10.0.234.30 – 10.0.234.31	10.0.234.31
17	10.0.234.32/31	10.0.234.32 – 10.0.234.33	10.0.234.33
18	10.0.234.34/31	10.0.234.34 – 10.0.234.35	10.0.234.35
19	10.0.234.36/31	10.0.234.36 – 10.0.234.37	10.0.234.37
20	10.0.234.38/31	10.0.234.38 – 10.0.234.39	10.0.234.39
21	10.0.234.40/31	10.0.234.40 – 10.0.234.41	10.0.234.41
22	10.0.234.42/31	10.0.234.42 – 10.0.234.43	10.0.234.43
23	10.0.234.44/31	10.0.234.44 – 10.0.234.45	10.0.234.45
24	10.0.234.46/31	10.0.234.46 – 10.0.234.47	10.0.234.47
25	10.0.234.48/31	10.0.234.48 – 10.0.234.49	10.0.234.49
26	10.0.234.50/31	10.0.234.50 – 10.0.234.51	10.0.234.51
27	10.0.234.52/31	10.0.234.52 – 10.0.234.53	10.0.234.53
28	10.0.234.54/31	10.0.234.54 – 10.0.234.55	10.0.234.55
29	10.0.234.56/31	10.0.234.56 – 10.0.234.57	10.0.234.57
30	10.0.234.58/31	10.0.234.58 – 10.0.234.59	10.0.234.59
31	10.0.234.60/31	10.0.234.60 – 10.0.234.61	10.0.234.61
32	10.0.234.62/31	10.0.234.62 – 10.0.234.63	10.0.234.63
33	10.0.234.64/31	10.0.234.64 – 10.0.234.65	10.0.234.65
34	10.0.234.66/31	10.0.234.66 – 10.0.234.67	10.0.234.67
35	10.0.234.68/31	10.0.234.68 – 10.0.234.69	10.0.234.69
36	10.0.234.70/31	10.0.234.70 – 10.0.234.71	10.0.234.71
37	10.0.234.72/31	10.0.234.72 – 10.0.234.73	10.0.234.73
38	10.0.234.74/31	10.0.234.74 – 10.0.234.75	10.0.234.75
39	10.0.234.76/31	10.0.234.76 – 10.0.234.77	10.0.234.77
40	10.0.234.78/31	10.0.234.78 – 10.0.234.79	10.0.234.79
41	10.0.234.80/31	10.0.234.80 – 10.0.234.81	10.0.234.81
42	10.0.234.82/31	10.0.234.82 – 10.0.234.83	10.0.234.83
43	10.0.234.84/31	10.0.234.84 – 10.0.234.85	10.0.234.85
44	10.0.234.86/31	10.0.234.86 – 10.0.234.87	10.0.234.87
45	10.0.234.88/31	10.0.234.88 – 10.0.234.89	10.0.234.89
46	10.0.234.90/31	10.0.234.90 – 10.0.234.91	10.0.234.91
47	10.0.234.92/31	10.0.234.92 – 10.0.234.93	10.0.234.93
48	10.0.234.94/31	10.0.234.94 – 10.0.234.95	10.0.234.95
49	10.0.234.96/31	10.0.234.96 – 10.0.234.97	10.0.234.97
50	10.0.234.98/31	10.0.234.98 – 10.0.234.99	10.0.234.99
51	10.0.234.100/31	10.0.234.100 – 10.0.234.101	10.0.234.101
52	10.0.234.102/31	10.0.234.102 – 10.0.234.103	10.0.234.103
53	10.0.234.104/31	10.0.234.104 – 10.0.234.105	10.0.234.105
54	10.0.234.106/31	10.0.234.106 – 10.0.234.107	10.0.234.107
55	10.0.234.108/31	10.0.234.108 – 10.0.234.109	10.0.234.109
56	10.0.234.110/31	10.0.234.110 – 10.0.234.111	10.0.234.111
57	10.0.234.112/31	10.0.234.112 – 10.0.234.113	10.0.234.113
58	10.0.234.114/31	10.0.234.114 – 10.0.234.115	10.0.234.115
59	10.0.234.116/31	10.0.234.116 – 10.0.234.117	10.0.234.117
60	10.0.234.118/31	10.0.234.118 – 10.0.234.119	10.0.234.119
61	10.0.234.120/31	10.0.234.120 – 10.0.234.121	10.0.234.121
62	10.0.234.122/31	10.0.234.122 – 10.0.234.123	10.0.234.123
63	10.0.234.124/31	10.0.234.124 – 10.0.234.125	10.0.234.125
64	10.0.234.126/31	10.0.234.126 – 10.0.234.127	10.0.234.127
65	10.0.234.128/31	10.0.234.128 – 10.0.234.129	10.0.234.129
66	10.0.234.130/31	10.0.234.130 – 10.0.234.131	10.0.234.131
67	10.0.234.132/31	10.0.234.132 – 10.0.234.133	10.0.234.133
68	10.0.234.134/31	10.0.234.134 – 10.0.234.135	10.0.234.135
69	10.0.234.136/31	10.0.234.136 – 10.0.234.137	10.0.234.137
70	10.0.234.138/31	10.0.234.138 – 10.0.234.139	10.0.234.139
71	10.0.234.140/31	10.0.234.140 – 10.0.234.141	10.0.234.141
72	10.0.234.142/31	10.0.234.142 – 10.0.234.143	10.0.234.143
73	10.0.234.144/31	10.0.234.144 – 10.0.234.145	10.0.234.145
74	10.0.234.146/31	10.0.234.146 – 10.0.234.147	10.0.234.147
75	10.0.234.148/31	10.0.234.148 – 10.0.234.149	10.0.234.149
76	10.0.234.150/31	10.0.234.150 – 10.0.234.151	10.0.234.151
77	10.0.234.152/31	10.0.234.152 – 10.0.234.153	10.0.234.153
78	10.0.234.154/31	10.0.234.154 – 10.0.234.155	10.0.234.155
79	10.0.234.156/31	10.0.234.156 – 10.0.234.157	10.0.234.157
80	10.0.234.158/31	10.0.234.158 – 10.0.234.159	10.0.234.159
81	10.0.234.160/31	10.0.234.160 – 10.0.234.161	10.0.234.161
82	10.0.234.162/31	10.0.234.162 – 10.0.234.163	10.0.234.163
83	10.0.234.164/31	10.0.234.164 – 10.0.234.165	10.0.234.165
84	10.0.234.166/31	10.0.234.166 – 10.0.234.167	10.0.234.167
85	10.0.234.168/31	10.0.234.168 – 10.0.234.169	10.0.234.169
86	10.0.234.170/31	10.0.234.170 – 10.0.234.171	10.0.234.171
87	10.0.234.172/31	10.0.234.172 – 10.0.234.173	10.0.234.173
88	10.0.234.174/31	10.0.234.174 – 10.0.234.175	10.0.234.175
89	10.0.234.176/31	10.0.234.176 – 10.0.234.177	10.0.234.177
90	10.0.234.178/31	10.0.234.178 – 10.0.234.179	10.0.234.179
91	10.0.234.180/31	10.0.234.180 – 10.0.234.181	10.0.234.181
92	10.0.234.182/31	10.0.234.182 – 10.0.234.183	10.0.234.183
93	10.0.234.184/31	10.0.234.184 – 10.0.234.185	10.0.234.185
94	10.0.234.186/31	10.0.234.186 – 10.0.234.187	10.0.234.187
95	10.0.234.188/31	10.0.234.188 – 10.0.234.189	10.0.234.189
96	10.0.234.190/31	10.0.234.190 – 10.0.234.191	10.0.234.191
97	10.0.234.192/31	10.0.234.192 – 10.0.234.193	10.0.234.193
98	10.0.234.194/31	10.0.234.194 – 10.0.234.195	10.0.234.195
99	10.0.234.196/31	10.0.234.196 – 10.0.234.197	10.0.234.197
100	10.0.234.198/31	10.0.234.198 – 10.0.234.199	10.0.234.199
101	10.0.234.200/31	10.0.234.200 – 10.0.234.201	10.0.234.201
102	10.0.234.202/31	10.0.234.202 – 10.0.234.203	10.0.234.203
103	10.0.234.204/31	10.0.234.204 – 10.0.234.205	10.0.234.205
104	10.0.234.206/31	10.0.234.206 – 10.0.234.207	10.0.234.207
105	10.0.234.208/31	10.0.234.208 – 10.0.234.209	10.0.234.209
106	10.0.234.210/31	10.0.234.210 – 10.0.234.211	10.0.234.211
107	10.0.234.212/31	10.0.234.212 – 10.0.234.213	10.0.234.213
108	10.0.234.214/31	10.0.234.214 – 10.0.234.215	10.0.234.215
109	10.0.234.216/31	10.0.234.216 – 10.0.234.217	10.0.234.217
110	10.0.234.218/31	10.0.234.218 – 10.0.234.219	10.0.234.219
111	10.0.234.220/31	10.0.234.220 – 10.0.234.221	10.0.234.221
112	10.0.234.222/31	10.0.234.222 – 10.0.234.223	10.0.234.223
113	10.0.234.224/31	10.0.234.224 – 10.0.234.225	10.0.234.225
114	10.0.234.226/31	10.0.234.226 – 10.0.234.227	10.0.234.227
115	10.0.234.228/31	10.0.234.228 – 10.0.234.229	10.0.234.229
116	10.0.234.230/31	10.0.234.230 – 10.0.234.231	10.0.234.231
117	10.0.234.232/31	10.0.234.232 – 10.0.234.233	10.0.234.233
118	10.0.234.234/31	10.0.234.234 – 10.0.234.235	10.0.234.235
119	10.0.234.236/31	10.0.234.236 – 10.0.234.237	10.0.234.237
120	10.0.234.238/31	10.0.234.238 – 10.0.234.239	10.0.234.239
121	10.0.234.240/31	10.0.234.240 – 10.0.234.241	10.0.234.241
122	10.0.234.242/31	10.0.234.242 – 10.0.234.243	10.0.234.243
123	10.0.234.244/31	10.0.234.244 – 10.0.234.245	10.0.234.245
124	10.0.234.246/31	10.0.234.246 – 10.0.234.247	10.0.234.247
125	10.0.234.248/31	10.0.234.248 – 10.0.234.249	10.0.234.249
126	10.0.234.250/31	10.0.234.250 – 10.0.234.251	10.0.234.251
127	10.0.234.252/31	10.0.234.252 – 10.0.234.253	10.0.234.253
128	10.0.234.254/31	10.0.234.254 – 10.0.234.255	10.0.234.255

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 →