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)10.37.80.0/22

network10.37.80.0/22

broadcast10.37.83.255

first host10.37.80.1

last host10.37.83.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.37.80.0/22

address00001010.00100101.01010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00100101.01010000.00000000

broadcast00001010.00100101.01010011.11111111

green = network part, grey = host part

hex0x0a255000

decimal170217472

reverse dns0.80.37.10.in-addr.arpa

ipv4-mapped::ffff:a25:5000

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.37.80.0/29	10.37.80.1 – 10.37.80.6	10.37.80.7
2	10.37.80.8/29	10.37.80.9 – 10.37.80.14	10.37.80.15
3	10.37.80.16/29	10.37.80.17 – 10.37.80.22	10.37.80.23
4	10.37.80.24/29	10.37.80.25 – 10.37.80.30	10.37.80.31
5	10.37.80.32/29	10.37.80.33 – 10.37.80.38	10.37.80.39
6	10.37.80.40/29	10.37.80.41 – 10.37.80.46	10.37.80.47
7	10.37.80.48/29	10.37.80.49 – 10.37.80.54	10.37.80.55
8	10.37.80.56/29	10.37.80.57 – 10.37.80.62	10.37.80.63
9	10.37.80.64/29	10.37.80.65 – 10.37.80.70	10.37.80.71
10	10.37.80.72/29	10.37.80.73 – 10.37.80.78	10.37.80.79
11	10.37.80.80/29	10.37.80.81 – 10.37.80.86	10.37.80.87
12	10.37.80.88/29	10.37.80.89 – 10.37.80.94	10.37.80.95
13	10.37.80.96/29	10.37.80.97 – 10.37.80.102	10.37.80.103
14	10.37.80.104/29	10.37.80.105 – 10.37.80.110	10.37.80.111
15	10.37.80.112/29	10.37.80.113 – 10.37.80.118	10.37.80.119
16	10.37.80.120/29	10.37.80.121 – 10.37.80.126	10.37.80.127
17	10.37.80.128/29	10.37.80.129 – 10.37.80.134	10.37.80.135
18	10.37.80.136/29	10.37.80.137 – 10.37.80.142	10.37.80.143
19	10.37.80.144/29	10.37.80.145 – 10.37.80.150	10.37.80.151
20	10.37.80.152/29	10.37.80.153 – 10.37.80.158	10.37.80.159
21	10.37.80.160/29	10.37.80.161 – 10.37.80.166	10.37.80.167
22	10.37.80.168/29	10.37.80.169 – 10.37.80.174	10.37.80.175
23	10.37.80.176/29	10.37.80.177 – 10.37.80.182	10.37.80.183
24	10.37.80.184/29	10.37.80.185 – 10.37.80.190	10.37.80.191
25	10.37.80.192/29	10.37.80.193 – 10.37.80.198	10.37.80.199
26	10.37.80.200/29	10.37.80.201 – 10.37.80.206	10.37.80.207
27	10.37.80.208/29	10.37.80.209 – 10.37.80.214	10.37.80.215
28	10.37.80.216/29	10.37.80.217 – 10.37.80.222	10.37.80.223
29	10.37.80.224/29	10.37.80.225 – 10.37.80.230	10.37.80.231
30	10.37.80.232/29	10.37.80.233 – 10.37.80.238	10.37.80.239
31	10.37.80.240/29	10.37.80.241 – 10.37.80.246	10.37.80.247
32	10.37.80.248/29	10.37.80.249 – 10.37.80.254	10.37.80.255
33	10.37.81.0/29	10.37.81.1 – 10.37.81.6	10.37.81.7
34	10.37.81.8/29	10.37.81.9 – 10.37.81.14	10.37.81.15
35	10.37.81.16/29	10.37.81.17 – 10.37.81.22	10.37.81.23
36	10.37.81.24/29	10.37.81.25 – 10.37.81.30	10.37.81.31
37	10.37.81.32/29	10.37.81.33 – 10.37.81.38	10.37.81.39
38	10.37.81.40/29	10.37.81.41 – 10.37.81.46	10.37.81.47
39	10.37.81.48/29	10.37.81.49 – 10.37.81.54	10.37.81.55
40	10.37.81.56/29	10.37.81.57 – 10.37.81.62	10.37.81.63
41	10.37.81.64/29	10.37.81.65 – 10.37.81.70	10.37.81.71
42	10.37.81.72/29	10.37.81.73 – 10.37.81.78	10.37.81.79
43	10.37.81.80/29	10.37.81.81 – 10.37.81.86	10.37.81.87
44	10.37.81.88/29	10.37.81.89 – 10.37.81.94	10.37.81.95
45	10.37.81.96/29	10.37.81.97 – 10.37.81.102	10.37.81.103
46	10.37.81.104/29	10.37.81.105 – 10.37.81.110	10.37.81.111
47	10.37.81.112/29	10.37.81.113 – 10.37.81.118	10.37.81.119
48	10.37.81.120/29	10.37.81.121 – 10.37.81.126	10.37.81.127
49	10.37.81.128/29	10.37.81.129 – 10.37.81.134	10.37.81.135
50	10.37.81.136/29	10.37.81.137 – 10.37.81.142	10.37.81.143
51	10.37.81.144/29	10.37.81.145 – 10.37.81.150	10.37.81.151
52	10.37.81.152/29	10.37.81.153 – 10.37.81.158	10.37.81.159
53	10.37.81.160/29	10.37.81.161 – 10.37.81.166	10.37.81.167
54	10.37.81.168/29	10.37.81.169 – 10.37.81.174	10.37.81.175
55	10.37.81.176/29	10.37.81.177 – 10.37.81.182	10.37.81.183
56	10.37.81.184/29	10.37.81.185 – 10.37.81.190	10.37.81.191
57	10.37.81.192/29	10.37.81.193 – 10.37.81.198	10.37.81.199
58	10.37.81.200/29	10.37.81.201 – 10.37.81.206	10.37.81.207
59	10.37.81.208/29	10.37.81.209 – 10.37.81.214	10.37.81.215
60	10.37.81.216/29	10.37.81.217 – 10.37.81.222	10.37.81.223
61	10.37.81.224/29	10.37.81.225 – 10.37.81.230	10.37.81.231
62	10.37.81.232/29	10.37.81.233 – 10.37.81.238	10.37.81.239
63	10.37.81.240/29	10.37.81.241 – 10.37.81.246	10.37.81.247
64	10.37.81.248/29	10.37.81.249 – 10.37.81.254	10.37.81.255
65	10.37.82.0/29	10.37.82.1 – 10.37.82.6	10.37.82.7
66	10.37.82.8/29	10.37.82.9 – 10.37.82.14	10.37.82.15
67	10.37.82.16/29	10.37.82.17 – 10.37.82.22	10.37.82.23
68	10.37.82.24/29	10.37.82.25 – 10.37.82.30	10.37.82.31
69	10.37.82.32/29	10.37.82.33 – 10.37.82.38	10.37.82.39
70	10.37.82.40/29	10.37.82.41 – 10.37.82.46	10.37.82.47
71	10.37.82.48/29	10.37.82.49 – 10.37.82.54	10.37.82.55
72	10.37.82.56/29	10.37.82.57 – 10.37.82.62	10.37.82.63
73	10.37.82.64/29	10.37.82.65 – 10.37.82.70	10.37.82.71
74	10.37.82.72/29	10.37.82.73 – 10.37.82.78	10.37.82.79
75	10.37.82.80/29	10.37.82.81 – 10.37.82.86	10.37.82.87
76	10.37.82.88/29	10.37.82.89 – 10.37.82.94	10.37.82.95
77	10.37.82.96/29	10.37.82.97 – 10.37.82.102	10.37.82.103
78	10.37.82.104/29	10.37.82.105 – 10.37.82.110	10.37.82.111
79	10.37.82.112/29	10.37.82.113 – 10.37.82.118	10.37.82.119
80	10.37.82.120/29	10.37.82.121 – 10.37.82.126	10.37.82.127
81	10.37.82.128/29	10.37.82.129 – 10.37.82.134	10.37.82.135
82	10.37.82.136/29	10.37.82.137 – 10.37.82.142	10.37.82.143
83	10.37.82.144/29	10.37.82.145 – 10.37.82.150	10.37.82.151
84	10.37.82.152/29	10.37.82.153 – 10.37.82.158	10.37.82.159
85	10.37.82.160/29	10.37.82.161 – 10.37.82.166	10.37.82.167
86	10.37.82.168/29	10.37.82.169 – 10.37.82.174	10.37.82.175
87	10.37.82.176/29	10.37.82.177 – 10.37.82.182	10.37.82.183
88	10.37.82.184/29	10.37.82.185 – 10.37.82.190	10.37.82.191
89	10.37.82.192/29	10.37.82.193 – 10.37.82.198	10.37.82.199
90	10.37.82.200/29	10.37.82.201 – 10.37.82.206	10.37.82.207
91	10.37.82.208/29	10.37.82.209 – 10.37.82.214	10.37.82.215
92	10.37.82.216/29	10.37.82.217 – 10.37.82.222	10.37.82.223
93	10.37.82.224/29	10.37.82.225 – 10.37.82.230	10.37.82.231
94	10.37.82.232/29	10.37.82.233 – 10.37.82.238	10.37.82.239
95	10.37.82.240/29	10.37.82.241 – 10.37.82.246	10.37.82.247
96	10.37.82.248/29	10.37.82.249 – 10.37.82.254	10.37.82.255
97	10.37.83.0/29	10.37.83.1 – 10.37.83.6	10.37.83.7
98	10.37.83.8/29	10.37.83.9 – 10.37.83.14	10.37.83.15
99	10.37.83.16/29	10.37.83.17 – 10.37.83.22	10.37.83.23
100	10.37.83.24/29	10.37.83.25 – 10.37.83.30	10.37.83.31
101	10.37.83.32/29	10.37.83.33 – 10.37.83.38	10.37.83.39
102	10.37.83.40/29	10.37.83.41 – 10.37.83.46	10.37.83.47
103	10.37.83.48/29	10.37.83.49 – 10.37.83.54	10.37.83.55
104	10.37.83.56/29	10.37.83.57 – 10.37.83.62	10.37.83.63
105	10.37.83.64/29	10.37.83.65 – 10.37.83.70	10.37.83.71
106	10.37.83.72/29	10.37.83.73 – 10.37.83.78	10.37.83.79
107	10.37.83.80/29	10.37.83.81 – 10.37.83.86	10.37.83.87
108	10.37.83.88/29	10.37.83.89 – 10.37.83.94	10.37.83.95
109	10.37.83.96/29	10.37.83.97 – 10.37.83.102	10.37.83.103
110	10.37.83.104/29	10.37.83.105 – 10.37.83.110	10.37.83.111
111	10.37.83.112/29	10.37.83.113 – 10.37.83.118	10.37.83.119
112	10.37.83.120/29	10.37.83.121 – 10.37.83.126	10.37.83.127
113	10.37.83.128/29	10.37.83.129 – 10.37.83.134	10.37.83.135
114	10.37.83.136/29	10.37.83.137 – 10.37.83.142	10.37.83.143
115	10.37.83.144/29	10.37.83.145 – 10.37.83.150	10.37.83.151
116	10.37.83.152/29	10.37.83.153 – 10.37.83.158	10.37.83.159
117	10.37.83.160/29	10.37.83.161 – 10.37.83.166	10.37.83.167
118	10.37.83.168/29	10.37.83.169 – 10.37.83.174	10.37.83.175
119	10.37.83.176/29	10.37.83.177 – 10.37.83.182	10.37.83.183
120	10.37.83.184/29	10.37.83.185 – 10.37.83.190	10.37.83.191
121	10.37.83.192/29	10.37.83.193 – 10.37.83.198	10.37.83.199
122	10.37.83.200/29	10.37.83.201 – 10.37.83.206	10.37.83.207
123	10.37.83.208/29	10.37.83.209 – 10.37.83.214	10.37.83.215
124	10.37.83.216/29	10.37.83.217 – 10.37.83.222	10.37.83.223
125	10.37.83.224/29	10.37.83.225 – 10.37.83.230	10.37.83.231
126	10.37.83.232/29	10.37.83.233 – 10.37.83.238	10.37.83.239
127	10.37.83.240/29	10.37.83.241 – 10.37.83.246	10.37.83.247
128	10.37.83.248/29	10.37.83.249 – 10.37.83.254	10.37.83.255

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →