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)10.69.239.0/24

network10.69.239.0/24

broadcast10.69.239.255

first host10.69.239.1

last host10.69.239.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.69.239.0/24

address00001010.01000101.11101111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01000101.11101111.00000000

broadcast00001010.01000101.11101111.11111111

green = network part, grey = host part

hex0x0a45ef00

decimal172355328

reverse dns0.239.69.10.in-addr.arpa

ipv4-mapped::ffff:a45:ef00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.69.239.0/30	10.69.239.1 – 10.69.239.2	10.69.239.3
2	10.69.239.4/30	10.69.239.5 – 10.69.239.6	10.69.239.7
3	10.69.239.8/30	10.69.239.9 – 10.69.239.10	10.69.239.11
4	10.69.239.12/30	10.69.239.13 – 10.69.239.14	10.69.239.15
5	10.69.239.16/30	10.69.239.17 – 10.69.239.18	10.69.239.19
6	10.69.239.20/30	10.69.239.21 – 10.69.239.22	10.69.239.23
7	10.69.239.24/30	10.69.239.25 – 10.69.239.26	10.69.239.27
8	10.69.239.28/30	10.69.239.29 – 10.69.239.30	10.69.239.31
9	10.69.239.32/30	10.69.239.33 – 10.69.239.34	10.69.239.35
10	10.69.239.36/30	10.69.239.37 – 10.69.239.38	10.69.239.39
11	10.69.239.40/30	10.69.239.41 – 10.69.239.42	10.69.239.43
12	10.69.239.44/30	10.69.239.45 – 10.69.239.46	10.69.239.47
13	10.69.239.48/30	10.69.239.49 – 10.69.239.50	10.69.239.51
14	10.69.239.52/30	10.69.239.53 – 10.69.239.54	10.69.239.55
15	10.69.239.56/30	10.69.239.57 – 10.69.239.58	10.69.239.59
16	10.69.239.60/30	10.69.239.61 – 10.69.239.62	10.69.239.63
17	10.69.239.64/30	10.69.239.65 – 10.69.239.66	10.69.239.67
18	10.69.239.68/30	10.69.239.69 – 10.69.239.70	10.69.239.71
19	10.69.239.72/30	10.69.239.73 – 10.69.239.74	10.69.239.75
20	10.69.239.76/30	10.69.239.77 – 10.69.239.78	10.69.239.79
21	10.69.239.80/30	10.69.239.81 – 10.69.239.82	10.69.239.83
22	10.69.239.84/30	10.69.239.85 – 10.69.239.86	10.69.239.87
23	10.69.239.88/30	10.69.239.89 – 10.69.239.90	10.69.239.91
24	10.69.239.92/30	10.69.239.93 – 10.69.239.94	10.69.239.95
25	10.69.239.96/30	10.69.239.97 – 10.69.239.98	10.69.239.99
26	10.69.239.100/30	10.69.239.101 – 10.69.239.102	10.69.239.103
27	10.69.239.104/30	10.69.239.105 – 10.69.239.106	10.69.239.107
28	10.69.239.108/30	10.69.239.109 – 10.69.239.110	10.69.239.111
29	10.69.239.112/30	10.69.239.113 – 10.69.239.114	10.69.239.115
30	10.69.239.116/30	10.69.239.117 – 10.69.239.118	10.69.239.119
31	10.69.239.120/30	10.69.239.121 – 10.69.239.122	10.69.239.123
32	10.69.239.124/30	10.69.239.125 – 10.69.239.126	10.69.239.127
33	10.69.239.128/30	10.69.239.129 – 10.69.239.130	10.69.239.131
34	10.69.239.132/30	10.69.239.133 – 10.69.239.134	10.69.239.135
35	10.69.239.136/30	10.69.239.137 – 10.69.239.138	10.69.239.139
36	10.69.239.140/30	10.69.239.141 – 10.69.239.142	10.69.239.143
37	10.69.239.144/30	10.69.239.145 – 10.69.239.146	10.69.239.147
38	10.69.239.148/30	10.69.239.149 – 10.69.239.150	10.69.239.151
39	10.69.239.152/30	10.69.239.153 – 10.69.239.154	10.69.239.155
40	10.69.239.156/30	10.69.239.157 – 10.69.239.158	10.69.239.159
41	10.69.239.160/30	10.69.239.161 – 10.69.239.162	10.69.239.163
42	10.69.239.164/30	10.69.239.165 – 10.69.239.166	10.69.239.167
43	10.69.239.168/30	10.69.239.169 – 10.69.239.170	10.69.239.171
44	10.69.239.172/30	10.69.239.173 – 10.69.239.174	10.69.239.175
45	10.69.239.176/30	10.69.239.177 – 10.69.239.178	10.69.239.179
46	10.69.239.180/30	10.69.239.181 – 10.69.239.182	10.69.239.183
47	10.69.239.184/30	10.69.239.185 – 10.69.239.186	10.69.239.187
48	10.69.239.188/30	10.69.239.189 – 10.69.239.190	10.69.239.191
49	10.69.239.192/30	10.69.239.193 – 10.69.239.194	10.69.239.195
50	10.69.239.196/30	10.69.239.197 – 10.69.239.198	10.69.239.199
51	10.69.239.200/30	10.69.239.201 – 10.69.239.202	10.69.239.203
52	10.69.239.204/30	10.69.239.205 – 10.69.239.206	10.69.239.207
53	10.69.239.208/30	10.69.239.209 – 10.69.239.210	10.69.239.211
54	10.69.239.212/30	10.69.239.213 – 10.69.239.214	10.69.239.215
55	10.69.239.216/30	10.69.239.217 – 10.69.239.218	10.69.239.219
56	10.69.239.220/30	10.69.239.221 – 10.69.239.222	10.69.239.223
57	10.69.239.224/30	10.69.239.225 – 10.69.239.226	10.69.239.227
58	10.69.239.228/30	10.69.239.229 – 10.69.239.230	10.69.239.231
59	10.69.239.232/30	10.69.239.233 – 10.69.239.234	10.69.239.235
60	10.69.239.236/30	10.69.239.237 – 10.69.239.238	10.69.239.239
61	10.69.239.240/30	10.69.239.241 – 10.69.239.242	10.69.239.243
62	10.69.239.244/30	10.69.239.245 – 10.69.239.246	10.69.239.247
63	10.69.239.248/30	10.69.239.249 – 10.69.239.250	10.69.239.251
64	10.69.239.252/30	10.69.239.253 – 10.69.239.254	10.69.239.255

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 →