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)10.50.192.0/18

network10.50.192.0/18

broadcast10.50.255.255

first host10.50.192.1

last host10.50.255.254

subnet mask255.255.192.0

wildcard0.0.63.255

addresses16,384

usable hosts16,382

classA

ipcalc 10.50.192.0/18

address00001010.00110010.11000000.00000000

subnet mask11111111.11111111.11000000.00000000

network00001010.00110010.11000000.00000000

broadcast00001010.00110010.11111111.11111111

green = network part, grey = host part

hex0x0a32c000

decimal171098112

reverse dns0.192.50.10.in-addr.arpa

ipv4-mapped::ffff:a32:c000

/18 split into /25 · 128 subnets

close ×

#	network	host range	broadcast
1	10.50.192.0/25	10.50.192.1 – 10.50.192.126	10.50.192.127
2	10.50.192.128/25	10.50.192.129 – 10.50.192.254	10.50.192.255
3	10.50.193.0/25	10.50.193.1 – 10.50.193.126	10.50.193.127
4	10.50.193.128/25	10.50.193.129 – 10.50.193.254	10.50.193.255
5	10.50.194.0/25	10.50.194.1 – 10.50.194.126	10.50.194.127
6	10.50.194.128/25	10.50.194.129 – 10.50.194.254	10.50.194.255
7	10.50.195.0/25	10.50.195.1 – 10.50.195.126	10.50.195.127
8	10.50.195.128/25	10.50.195.129 – 10.50.195.254	10.50.195.255
9	10.50.196.0/25	10.50.196.1 – 10.50.196.126	10.50.196.127
10	10.50.196.128/25	10.50.196.129 – 10.50.196.254	10.50.196.255
11	10.50.197.0/25	10.50.197.1 – 10.50.197.126	10.50.197.127
12	10.50.197.128/25	10.50.197.129 – 10.50.197.254	10.50.197.255
13	10.50.198.0/25	10.50.198.1 – 10.50.198.126	10.50.198.127
14	10.50.198.128/25	10.50.198.129 – 10.50.198.254	10.50.198.255
15	10.50.199.0/25	10.50.199.1 – 10.50.199.126	10.50.199.127
16	10.50.199.128/25	10.50.199.129 – 10.50.199.254	10.50.199.255
17	10.50.200.0/25	10.50.200.1 – 10.50.200.126	10.50.200.127
18	10.50.200.128/25	10.50.200.129 – 10.50.200.254	10.50.200.255
19	10.50.201.0/25	10.50.201.1 – 10.50.201.126	10.50.201.127
20	10.50.201.128/25	10.50.201.129 – 10.50.201.254	10.50.201.255
21	10.50.202.0/25	10.50.202.1 – 10.50.202.126	10.50.202.127
22	10.50.202.128/25	10.50.202.129 – 10.50.202.254	10.50.202.255
23	10.50.203.0/25	10.50.203.1 – 10.50.203.126	10.50.203.127
24	10.50.203.128/25	10.50.203.129 – 10.50.203.254	10.50.203.255
25	10.50.204.0/25	10.50.204.1 – 10.50.204.126	10.50.204.127
26	10.50.204.128/25	10.50.204.129 – 10.50.204.254	10.50.204.255
27	10.50.205.0/25	10.50.205.1 – 10.50.205.126	10.50.205.127
28	10.50.205.128/25	10.50.205.129 – 10.50.205.254	10.50.205.255
29	10.50.206.0/25	10.50.206.1 – 10.50.206.126	10.50.206.127
30	10.50.206.128/25	10.50.206.129 – 10.50.206.254	10.50.206.255
31	10.50.207.0/25	10.50.207.1 – 10.50.207.126	10.50.207.127
32	10.50.207.128/25	10.50.207.129 – 10.50.207.254	10.50.207.255
33	10.50.208.0/25	10.50.208.1 – 10.50.208.126	10.50.208.127
34	10.50.208.128/25	10.50.208.129 – 10.50.208.254	10.50.208.255
35	10.50.209.0/25	10.50.209.1 – 10.50.209.126	10.50.209.127
36	10.50.209.128/25	10.50.209.129 – 10.50.209.254	10.50.209.255
37	10.50.210.0/25	10.50.210.1 – 10.50.210.126	10.50.210.127
38	10.50.210.128/25	10.50.210.129 – 10.50.210.254	10.50.210.255
39	10.50.211.0/25	10.50.211.1 – 10.50.211.126	10.50.211.127
40	10.50.211.128/25	10.50.211.129 – 10.50.211.254	10.50.211.255
41	10.50.212.0/25	10.50.212.1 – 10.50.212.126	10.50.212.127
42	10.50.212.128/25	10.50.212.129 – 10.50.212.254	10.50.212.255
43	10.50.213.0/25	10.50.213.1 – 10.50.213.126	10.50.213.127
44	10.50.213.128/25	10.50.213.129 – 10.50.213.254	10.50.213.255
45	10.50.214.0/25	10.50.214.1 – 10.50.214.126	10.50.214.127
46	10.50.214.128/25	10.50.214.129 – 10.50.214.254	10.50.214.255
47	10.50.215.0/25	10.50.215.1 – 10.50.215.126	10.50.215.127
48	10.50.215.128/25	10.50.215.129 – 10.50.215.254	10.50.215.255
49	10.50.216.0/25	10.50.216.1 – 10.50.216.126	10.50.216.127
50	10.50.216.128/25	10.50.216.129 – 10.50.216.254	10.50.216.255
51	10.50.217.0/25	10.50.217.1 – 10.50.217.126	10.50.217.127
52	10.50.217.128/25	10.50.217.129 – 10.50.217.254	10.50.217.255
53	10.50.218.0/25	10.50.218.1 – 10.50.218.126	10.50.218.127
54	10.50.218.128/25	10.50.218.129 – 10.50.218.254	10.50.218.255
55	10.50.219.0/25	10.50.219.1 – 10.50.219.126	10.50.219.127
56	10.50.219.128/25	10.50.219.129 – 10.50.219.254	10.50.219.255
57	10.50.220.0/25	10.50.220.1 – 10.50.220.126	10.50.220.127
58	10.50.220.128/25	10.50.220.129 – 10.50.220.254	10.50.220.255
59	10.50.221.0/25	10.50.221.1 – 10.50.221.126	10.50.221.127
60	10.50.221.128/25	10.50.221.129 – 10.50.221.254	10.50.221.255
61	10.50.222.0/25	10.50.222.1 – 10.50.222.126	10.50.222.127
62	10.50.222.128/25	10.50.222.129 – 10.50.222.254	10.50.222.255
63	10.50.223.0/25	10.50.223.1 – 10.50.223.126	10.50.223.127
64	10.50.223.128/25	10.50.223.129 – 10.50.223.254	10.50.223.255
65	10.50.224.0/25	10.50.224.1 – 10.50.224.126	10.50.224.127
66	10.50.224.128/25	10.50.224.129 – 10.50.224.254	10.50.224.255
67	10.50.225.0/25	10.50.225.1 – 10.50.225.126	10.50.225.127
68	10.50.225.128/25	10.50.225.129 – 10.50.225.254	10.50.225.255
69	10.50.226.0/25	10.50.226.1 – 10.50.226.126	10.50.226.127
70	10.50.226.128/25	10.50.226.129 – 10.50.226.254	10.50.226.255
71	10.50.227.0/25	10.50.227.1 – 10.50.227.126	10.50.227.127
72	10.50.227.128/25	10.50.227.129 – 10.50.227.254	10.50.227.255
73	10.50.228.0/25	10.50.228.1 – 10.50.228.126	10.50.228.127
74	10.50.228.128/25	10.50.228.129 – 10.50.228.254	10.50.228.255
75	10.50.229.0/25	10.50.229.1 – 10.50.229.126	10.50.229.127
76	10.50.229.128/25	10.50.229.129 – 10.50.229.254	10.50.229.255
77	10.50.230.0/25	10.50.230.1 – 10.50.230.126	10.50.230.127
78	10.50.230.128/25	10.50.230.129 – 10.50.230.254	10.50.230.255
79	10.50.231.0/25	10.50.231.1 – 10.50.231.126	10.50.231.127
80	10.50.231.128/25	10.50.231.129 – 10.50.231.254	10.50.231.255
81	10.50.232.0/25	10.50.232.1 – 10.50.232.126	10.50.232.127
82	10.50.232.128/25	10.50.232.129 – 10.50.232.254	10.50.232.255
83	10.50.233.0/25	10.50.233.1 – 10.50.233.126	10.50.233.127
84	10.50.233.128/25	10.50.233.129 – 10.50.233.254	10.50.233.255
85	10.50.234.0/25	10.50.234.1 – 10.50.234.126	10.50.234.127
86	10.50.234.128/25	10.50.234.129 – 10.50.234.254	10.50.234.255
87	10.50.235.0/25	10.50.235.1 – 10.50.235.126	10.50.235.127
88	10.50.235.128/25	10.50.235.129 – 10.50.235.254	10.50.235.255
89	10.50.236.0/25	10.50.236.1 – 10.50.236.126	10.50.236.127
90	10.50.236.128/25	10.50.236.129 – 10.50.236.254	10.50.236.255
91	10.50.237.0/25	10.50.237.1 – 10.50.237.126	10.50.237.127
92	10.50.237.128/25	10.50.237.129 – 10.50.237.254	10.50.237.255
93	10.50.238.0/25	10.50.238.1 – 10.50.238.126	10.50.238.127
94	10.50.238.128/25	10.50.238.129 – 10.50.238.254	10.50.238.255
95	10.50.239.0/25	10.50.239.1 – 10.50.239.126	10.50.239.127
96	10.50.239.128/25	10.50.239.129 – 10.50.239.254	10.50.239.255
97	10.50.240.0/25	10.50.240.1 – 10.50.240.126	10.50.240.127
98	10.50.240.128/25	10.50.240.129 – 10.50.240.254	10.50.240.255
99	10.50.241.0/25	10.50.241.1 – 10.50.241.126	10.50.241.127
100	10.50.241.128/25	10.50.241.129 – 10.50.241.254	10.50.241.255
101	10.50.242.0/25	10.50.242.1 – 10.50.242.126	10.50.242.127
102	10.50.242.128/25	10.50.242.129 – 10.50.242.254	10.50.242.255
103	10.50.243.0/25	10.50.243.1 – 10.50.243.126	10.50.243.127
104	10.50.243.128/25	10.50.243.129 – 10.50.243.254	10.50.243.255
105	10.50.244.0/25	10.50.244.1 – 10.50.244.126	10.50.244.127
106	10.50.244.128/25	10.50.244.129 – 10.50.244.254	10.50.244.255
107	10.50.245.0/25	10.50.245.1 – 10.50.245.126	10.50.245.127
108	10.50.245.128/25	10.50.245.129 – 10.50.245.254	10.50.245.255
109	10.50.246.0/25	10.50.246.1 – 10.50.246.126	10.50.246.127
110	10.50.246.128/25	10.50.246.129 – 10.50.246.254	10.50.246.255
111	10.50.247.0/25	10.50.247.1 – 10.50.247.126	10.50.247.127
112	10.50.247.128/25	10.50.247.129 – 10.50.247.254	10.50.247.255
113	10.50.248.0/25	10.50.248.1 – 10.50.248.126	10.50.248.127
114	10.50.248.128/25	10.50.248.129 – 10.50.248.254	10.50.248.255
115	10.50.249.0/25	10.50.249.1 – 10.50.249.126	10.50.249.127
116	10.50.249.128/25	10.50.249.129 – 10.50.249.254	10.50.249.255
117	10.50.250.0/25	10.50.250.1 – 10.50.250.126	10.50.250.127
118	10.50.250.128/25	10.50.250.129 – 10.50.250.254	10.50.250.255
119	10.50.251.0/25	10.50.251.1 – 10.50.251.126	10.50.251.127
120	10.50.251.128/25	10.50.251.129 – 10.50.251.254	10.50.251.255
121	10.50.252.0/25	10.50.252.1 – 10.50.252.126	10.50.252.127
122	10.50.252.128/25	10.50.252.129 – 10.50.252.254	10.50.252.255
123	10.50.253.0/25	10.50.253.1 – 10.50.253.126	10.50.253.127
124	10.50.253.128/25	10.50.253.129 – 10.50.253.254	10.50.253.255
125	10.50.254.0/25	10.50.254.1 – 10.50.254.126	10.50.254.127
126	10.50.254.128/25	10.50.254.129 – 10.50.254.254	10.50.254.255
127	10.50.255.0/25	10.50.255.1 – 10.50.255.126	10.50.255.127
128	10.50.255.128/25	10.50.255.129 – 10.50.255.254	10.50.255.255

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 /18
/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	1
/19	255.255.224.0	8,192	8,190	2 split →
/20	255.255.240.0	4,096	4,094	4 split →
/21	255.255.248.0	2,048	2,046	8 split →
/22	255.255.252.0	1,024	1,022	16 split →
/23	255.255.254.0	512	510	32 split →
/24	255.255.255.0	256	254	64 split →
/25	255.255.255.128	128	126	128 split →
/26	255.255.255.192	64	62	256 split →
/27	255.255.255.224	32	30	512 split →
/28	255.255.255.240	16	14	1,024 split →
/29	255.255.255.248	8	6	2,048 split →
/30	255.255.255.252	4	2	4,096 split →
/31	255.255.255.254	2	2	8,192 split →
/32	255.255.255.255	1	1	16,384 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 →