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)10.63.52.0/24

network10.63.52.0/24

broadcast10.63.52.255

first host10.63.52.1

last host10.63.52.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.63.52.0/24

address00001010.00111111.00110100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00111111.00110100.00000000

broadcast00001010.00111111.00110100.11111111

green = network part, grey = host part

hex0x0a3f3400

decimal171914240

reverse dns0.52.63.10.in-addr.arpa

ipv4-mapped::ffff:a3f:3400

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.63.52.0/30	10.63.52.1 – 10.63.52.2	10.63.52.3
2	10.63.52.4/30	10.63.52.5 – 10.63.52.6	10.63.52.7
3	10.63.52.8/30	10.63.52.9 – 10.63.52.10	10.63.52.11
4	10.63.52.12/30	10.63.52.13 – 10.63.52.14	10.63.52.15
5	10.63.52.16/30	10.63.52.17 – 10.63.52.18	10.63.52.19
6	10.63.52.20/30	10.63.52.21 – 10.63.52.22	10.63.52.23
7	10.63.52.24/30	10.63.52.25 – 10.63.52.26	10.63.52.27
8	10.63.52.28/30	10.63.52.29 – 10.63.52.30	10.63.52.31
9	10.63.52.32/30	10.63.52.33 – 10.63.52.34	10.63.52.35
10	10.63.52.36/30	10.63.52.37 – 10.63.52.38	10.63.52.39
11	10.63.52.40/30	10.63.52.41 – 10.63.52.42	10.63.52.43
12	10.63.52.44/30	10.63.52.45 – 10.63.52.46	10.63.52.47
13	10.63.52.48/30	10.63.52.49 – 10.63.52.50	10.63.52.51
14	10.63.52.52/30	10.63.52.53 – 10.63.52.54	10.63.52.55
15	10.63.52.56/30	10.63.52.57 – 10.63.52.58	10.63.52.59
16	10.63.52.60/30	10.63.52.61 – 10.63.52.62	10.63.52.63
17	10.63.52.64/30	10.63.52.65 – 10.63.52.66	10.63.52.67
18	10.63.52.68/30	10.63.52.69 – 10.63.52.70	10.63.52.71
19	10.63.52.72/30	10.63.52.73 – 10.63.52.74	10.63.52.75
20	10.63.52.76/30	10.63.52.77 – 10.63.52.78	10.63.52.79
21	10.63.52.80/30	10.63.52.81 – 10.63.52.82	10.63.52.83
22	10.63.52.84/30	10.63.52.85 – 10.63.52.86	10.63.52.87
23	10.63.52.88/30	10.63.52.89 – 10.63.52.90	10.63.52.91
24	10.63.52.92/30	10.63.52.93 – 10.63.52.94	10.63.52.95
25	10.63.52.96/30	10.63.52.97 – 10.63.52.98	10.63.52.99
26	10.63.52.100/30	10.63.52.101 – 10.63.52.102	10.63.52.103
27	10.63.52.104/30	10.63.52.105 – 10.63.52.106	10.63.52.107
28	10.63.52.108/30	10.63.52.109 – 10.63.52.110	10.63.52.111
29	10.63.52.112/30	10.63.52.113 – 10.63.52.114	10.63.52.115
30	10.63.52.116/30	10.63.52.117 – 10.63.52.118	10.63.52.119
31	10.63.52.120/30	10.63.52.121 – 10.63.52.122	10.63.52.123
32	10.63.52.124/30	10.63.52.125 – 10.63.52.126	10.63.52.127
33	10.63.52.128/30	10.63.52.129 – 10.63.52.130	10.63.52.131
34	10.63.52.132/30	10.63.52.133 – 10.63.52.134	10.63.52.135
35	10.63.52.136/30	10.63.52.137 – 10.63.52.138	10.63.52.139
36	10.63.52.140/30	10.63.52.141 – 10.63.52.142	10.63.52.143
37	10.63.52.144/30	10.63.52.145 – 10.63.52.146	10.63.52.147
38	10.63.52.148/30	10.63.52.149 – 10.63.52.150	10.63.52.151
39	10.63.52.152/30	10.63.52.153 – 10.63.52.154	10.63.52.155
40	10.63.52.156/30	10.63.52.157 – 10.63.52.158	10.63.52.159
41	10.63.52.160/30	10.63.52.161 – 10.63.52.162	10.63.52.163
42	10.63.52.164/30	10.63.52.165 – 10.63.52.166	10.63.52.167
43	10.63.52.168/30	10.63.52.169 – 10.63.52.170	10.63.52.171
44	10.63.52.172/30	10.63.52.173 – 10.63.52.174	10.63.52.175
45	10.63.52.176/30	10.63.52.177 – 10.63.52.178	10.63.52.179
46	10.63.52.180/30	10.63.52.181 – 10.63.52.182	10.63.52.183
47	10.63.52.184/30	10.63.52.185 – 10.63.52.186	10.63.52.187
48	10.63.52.188/30	10.63.52.189 – 10.63.52.190	10.63.52.191
49	10.63.52.192/30	10.63.52.193 – 10.63.52.194	10.63.52.195
50	10.63.52.196/30	10.63.52.197 – 10.63.52.198	10.63.52.199
51	10.63.52.200/30	10.63.52.201 – 10.63.52.202	10.63.52.203
52	10.63.52.204/30	10.63.52.205 – 10.63.52.206	10.63.52.207
53	10.63.52.208/30	10.63.52.209 – 10.63.52.210	10.63.52.211
54	10.63.52.212/30	10.63.52.213 – 10.63.52.214	10.63.52.215
55	10.63.52.216/30	10.63.52.217 – 10.63.52.218	10.63.52.219
56	10.63.52.220/30	10.63.52.221 – 10.63.52.222	10.63.52.223
57	10.63.52.224/30	10.63.52.225 – 10.63.52.226	10.63.52.227
58	10.63.52.228/30	10.63.52.229 – 10.63.52.230	10.63.52.231
59	10.63.52.232/30	10.63.52.233 – 10.63.52.234	10.63.52.235
60	10.63.52.236/30	10.63.52.237 – 10.63.52.238	10.63.52.239
61	10.63.52.240/30	10.63.52.241 – 10.63.52.242	10.63.52.243
62	10.63.52.244/30	10.63.52.245 – 10.63.52.246	10.63.52.247
63	10.63.52.248/30	10.63.52.249 – 10.63.52.250	10.63.52.251
64	10.63.52.252/30	10.63.52.253 – 10.63.52.254	10.63.52.255

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 →