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)10.2.235.0/24

network10.2.235.0/24

broadcast10.2.235.255

first host10.2.235.1

last host10.2.235.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.235.0/24

address00001010.00000010.11101011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11101011.00000000

broadcast00001010.00000010.11101011.11111111

green = network part, grey = host part

hex0x0a02eb00

decimal167963392

reverse dns0.235.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:eb00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.235.0/31	10.2.235.0 – 10.2.235.1	10.2.235.1
2	10.2.235.2/31	10.2.235.2 – 10.2.235.3	10.2.235.3
3	10.2.235.4/31	10.2.235.4 – 10.2.235.5	10.2.235.5
4	10.2.235.6/31	10.2.235.6 – 10.2.235.7	10.2.235.7
5	10.2.235.8/31	10.2.235.8 – 10.2.235.9	10.2.235.9
6	10.2.235.10/31	10.2.235.10 – 10.2.235.11	10.2.235.11
7	10.2.235.12/31	10.2.235.12 – 10.2.235.13	10.2.235.13
8	10.2.235.14/31	10.2.235.14 – 10.2.235.15	10.2.235.15
9	10.2.235.16/31	10.2.235.16 – 10.2.235.17	10.2.235.17
10	10.2.235.18/31	10.2.235.18 – 10.2.235.19	10.2.235.19
11	10.2.235.20/31	10.2.235.20 – 10.2.235.21	10.2.235.21
12	10.2.235.22/31	10.2.235.22 – 10.2.235.23	10.2.235.23
13	10.2.235.24/31	10.2.235.24 – 10.2.235.25	10.2.235.25
14	10.2.235.26/31	10.2.235.26 – 10.2.235.27	10.2.235.27
15	10.2.235.28/31	10.2.235.28 – 10.2.235.29	10.2.235.29
16	10.2.235.30/31	10.2.235.30 – 10.2.235.31	10.2.235.31
17	10.2.235.32/31	10.2.235.32 – 10.2.235.33	10.2.235.33
18	10.2.235.34/31	10.2.235.34 – 10.2.235.35	10.2.235.35
19	10.2.235.36/31	10.2.235.36 – 10.2.235.37	10.2.235.37
20	10.2.235.38/31	10.2.235.38 – 10.2.235.39	10.2.235.39
21	10.2.235.40/31	10.2.235.40 – 10.2.235.41	10.2.235.41
22	10.2.235.42/31	10.2.235.42 – 10.2.235.43	10.2.235.43
23	10.2.235.44/31	10.2.235.44 – 10.2.235.45	10.2.235.45
24	10.2.235.46/31	10.2.235.46 – 10.2.235.47	10.2.235.47
25	10.2.235.48/31	10.2.235.48 – 10.2.235.49	10.2.235.49
26	10.2.235.50/31	10.2.235.50 – 10.2.235.51	10.2.235.51
27	10.2.235.52/31	10.2.235.52 – 10.2.235.53	10.2.235.53
28	10.2.235.54/31	10.2.235.54 – 10.2.235.55	10.2.235.55
29	10.2.235.56/31	10.2.235.56 – 10.2.235.57	10.2.235.57
30	10.2.235.58/31	10.2.235.58 – 10.2.235.59	10.2.235.59
31	10.2.235.60/31	10.2.235.60 – 10.2.235.61	10.2.235.61
32	10.2.235.62/31	10.2.235.62 – 10.2.235.63	10.2.235.63
33	10.2.235.64/31	10.2.235.64 – 10.2.235.65	10.2.235.65
34	10.2.235.66/31	10.2.235.66 – 10.2.235.67	10.2.235.67
35	10.2.235.68/31	10.2.235.68 – 10.2.235.69	10.2.235.69
36	10.2.235.70/31	10.2.235.70 – 10.2.235.71	10.2.235.71
37	10.2.235.72/31	10.2.235.72 – 10.2.235.73	10.2.235.73
38	10.2.235.74/31	10.2.235.74 – 10.2.235.75	10.2.235.75
39	10.2.235.76/31	10.2.235.76 – 10.2.235.77	10.2.235.77
40	10.2.235.78/31	10.2.235.78 – 10.2.235.79	10.2.235.79
41	10.2.235.80/31	10.2.235.80 – 10.2.235.81	10.2.235.81
42	10.2.235.82/31	10.2.235.82 – 10.2.235.83	10.2.235.83
43	10.2.235.84/31	10.2.235.84 – 10.2.235.85	10.2.235.85
44	10.2.235.86/31	10.2.235.86 – 10.2.235.87	10.2.235.87
45	10.2.235.88/31	10.2.235.88 – 10.2.235.89	10.2.235.89
46	10.2.235.90/31	10.2.235.90 – 10.2.235.91	10.2.235.91
47	10.2.235.92/31	10.2.235.92 – 10.2.235.93	10.2.235.93
48	10.2.235.94/31	10.2.235.94 – 10.2.235.95	10.2.235.95
49	10.2.235.96/31	10.2.235.96 – 10.2.235.97	10.2.235.97
50	10.2.235.98/31	10.2.235.98 – 10.2.235.99	10.2.235.99
51	10.2.235.100/31	10.2.235.100 – 10.2.235.101	10.2.235.101
52	10.2.235.102/31	10.2.235.102 – 10.2.235.103	10.2.235.103
53	10.2.235.104/31	10.2.235.104 – 10.2.235.105	10.2.235.105
54	10.2.235.106/31	10.2.235.106 – 10.2.235.107	10.2.235.107
55	10.2.235.108/31	10.2.235.108 – 10.2.235.109	10.2.235.109
56	10.2.235.110/31	10.2.235.110 – 10.2.235.111	10.2.235.111
57	10.2.235.112/31	10.2.235.112 – 10.2.235.113	10.2.235.113
58	10.2.235.114/31	10.2.235.114 – 10.2.235.115	10.2.235.115
59	10.2.235.116/31	10.2.235.116 – 10.2.235.117	10.2.235.117
60	10.2.235.118/31	10.2.235.118 – 10.2.235.119	10.2.235.119
61	10.2.235.120/31	10.2.235.120 – 10.2.235.121	10.2.235.121
62	10.2.235.122/31	10.2.235.122 – 10.2.235.123	10.2.235.123
63	10.2.235.124/31	10.2.235.124 – 10.2.235.125	10.2.235.125
64	10.2.235.126/31	10.2.235.126 – 10.2.235.127	10.2.235.127
65	10.2.235.128/31	10.2.235.128 – 10.2.235.129	10.2.235.129
66	10.2.235.130/31	10.2.235.130 – 10.2.235.131	10.2.235.131
67	10.2.235.132/31	10.2.235.132 – 10.2.235.133	10.2.235.133
68	10.2.235.134/31	10.2.235.134 – 10.2.235.135	10.2.235.135
69	10.2.235.136/31	10.2.235.136 – 10.2.235.137	10.2.235.137
70	10.2.235.138/31	10.2.235.138 – 10.2.235.139	10.2.235.139
71	10.2.235.140/31	10.2.235.140 – 10.2.235.141	10.2.235.141
72	10.2.235.142/31	10.2.235.142 – 10.2.235.143	10.2.235.143
73	10.2.235.144/31	10.2.235.144 – 10.2.235.145	10.2.235.145
74	10.2.235.146/31	10.2.235.146 – 10.2.235.147	10.2.235.147
75	10.2.235.148/31	10.2.235.148 – 10.2.235.149	10.2.235.149
76	10.2.235.150/31	10.2.235.150 – 10.2.235.151	10.2.235.151
77	10.2.235.152/31	10.2.235.152 – 10.2.235.153	10.2.235.153
78	10.2.235.154/31	10.2.235.154 – 10.2.235.155	10.2.235.155
79	10.2.235.156/31	10.2.235.156 – 10.2.235.157	10.2.235.157
80	10.2.235.158/31	10.2.235.158 – 10.2.235.159	10.2.235.159
81	10.2.235.160/31	10.2.235.160 – 10.2.235.161	10.2.235.161
82	10.2.235.162/31	10.2.235.162 – 10.2.235.163	10.2.235.163
83	10.2.235.164/31	10.2.235.164 – 10.2.235.165	10.2.235.165
84	10.2.235.166/31	10.2.235.166 – 10.2.235.167	10.2.235.167
85	10.2.235.168/31	10.2.235.168 – 10.2.235.169	10.2.235.169
86	10.2.235.170/31	10.2.235.170 – 10.2.235.171	10.2.235.171
87	10.2.235.172/31	10.2.235.172 – 10.2.235.173	10.2.235.173
88	10.2.235.174/31	10.2.235.174 – 10.2.235.175	10.2.235.175
89	10.2.235.176/31	10.2.235.176 – 10.2.235.177	10.2.235.177
90	10.2.235.178/31	10.2.235.178 – 10.2.235.179	10.2.235.179
91	10.2.235.180/31	10.2.235.180 – 10.2.235.181	10.2.235.181
92	10.2.235.182/31	10.2.235.182 – 10.2.235.183	10.2.235.183
93	10.2.235.184/31	10.2.235.184 – 10.2.235.185	10.2.235.185
94	10.2.235.186/31	10.2.235.186 – 10.2.235.187	10.2.235.187
95	10.2.235.188/31	10.2.235.188 – 10.2.235.189	10.2.235.189
96	10.2.235.190/31	10.2.235.190 – 10.2.235.191	10.2.235.191
97	10.2.235.192/31	10.2.235.192 – 10.2.235.193	10.2.235.193
98	10.2.235.194/31	10.2.235.194 – 10.2.235.195	10.2.235.195
99	10.2.235.196/31	10.2.235.196 – 10.2.235.197	10.2.235.197
100	10.2.235.198/31	10.2.235.198 – 10.2.235.199	10.2.235.199
101	10.2.235.200/31	10.2.235.200 – 10.2.235.201	10.2.235.201
102	10.2.235.202/31	10.2.235.202 – 10.2.235.203	10.2.235.203
103	10.2.235.204/31	10.2.235.204 – 10.2.235.205	10.2.235.205
104	10.2.235.206/31	10.2.235.206 – 10.2.235.207	10.2.235.207
105	10.2.235.208/31	10.2.235.208 – 10.2.235.209	10.2.235.209
106	10.2.235.210/31	10.2.235.210 – 10.2.235.211	10.2.235.211
107	10.2.235.212/31	10.2.235.212 – 10.2.235.213	10.2.235.213
108	10.2.235.214/31	10.2.235.214 – 10.2.235.215	10.2.235.215
109	10.2.235.216/31	10.2.235.216 – 10.2.235.217	10.2.235.217
110	10.2.235.218/31	10.2.235.218 – 10.2.235.219	10.2.235.219
111	10.2.235.220/31	10.2.235.220 – 10.2.235.221	10.2.235.221
112	10.2.235.222/31	10.2.235.222 – 10.2.235.223	10.2.235.223
113	10.2.235.224/31	10.2.235.224 – 10.2.235.225	10.2.235.225
114	10.2.235.226/31	10.2.235.226 – 10.2.235.227	10.2.235.227
115	10.2.235.228/31	10.2.235.228 – 10.2.235.229	10.2.235.229
116	10.2.235.230/31	10.2.235.230 – 10.2.235.231	10.2.235.231
117	10.2.235.232/31	10.2.235.232 – 10.2.235.233	10.2.235.233
118	10.2.235.234/31	10.2.235.234 – 10.2.235.235	10.2.235.235
119	10.2.235.236/31	10.2.235.236 – 10.2.235.237	10.2.235.237
120	10.2.235.238/31	10.2.235.238 – 10.2.235.239	10.2.235.239
121	10.2.235.240/31	10.2.235.240 – 10.2.235.241	10.2.235.241
122	10.2.235.242/31	10.2.235.242 – 10.2.235.243	10.2.235.243
123	10.2.235.244/31	10.2.235.244 – 10.2.235.245	10.2.235.245
124	10.2.235.246/31	10.2.235.246 – 10.2.235.247	10.2.235.247
125	10.2.235.248/31	10.2.235.248 – 10.2.235.249	10.2.235.249
126	10.2.235.250/31	10.2.235.250 – 10.2.235.251	10.2.235.251
127	10.2.235.252/31	10.2.235.252 – 10.2.235.253	10.2.235.253
128	10.2.235.254/31	10.2.235.254 – 10.2.235.255	10.2.235.255

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 →