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)10.37.0.0/22

network10.37.0.0/22

broadcast10.37.3.255

first host10.37.0.1

last host10.37.3.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.37.0.0/22

address00001010.00100101.00000000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00100101.00000000.00000000

broadcast00001010.00100101.00000011.11111111

green = network part, grey = host part

hex0x0a250000

decimal170196992

reverse dns0.0.37.10.in-addr.arpa

ipv4-mapped::ffff:a25:0

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.37.0.0/29	10.37.0.1 – 10.37.0.6	10.37.0.7
2	10.37.0.8/29	10.37.0.9 – 10.37.0.14	10.37.0.15
3	10.37.0.16/29	10.37.0.17 – 10.37.0.22	10.37.0.23
4	10.37.0.24/29	10.37.0.25 – 10.37.0.30	10.37.0.31
5	10.37.0.32/29	10.37.0.33 – 10.37.0.38	10.37.0.39
6	10.37.0.40/29	10.37.0.41 – 10.37.0.46	10.37.0.47
7	10.37.0.48/29	10.37.0.49 – 10.37.0.54	10.37.0.55
8	10.37.0.56/29	10.37.0.57 – 10.37.0.62	10.37.0.63
9	10.37.0.64/29	10.37.0.65 – 10.37.0.70	10.37.0.71
10	10.37.0.72/29	10.37.0.73 – 10.37.0.78	10.37.0.79
11	10.37.0.80/29	10.37.0.81 – 10.37.0.86	10.37.0.87
12	10.37.0.88/29	10.37.0.89 – 10.37.0.94	10.37.0.95
13	10.37.0.96/29	10.37.0.97 – 10.37.0.102	10.37.0.103
14	10.37.0.104/29	10.37.0.105 – 10.37.0.110	10.37.0.111
15	10.37.0.112/29	10.37.0.113 – 10.37.0.118	10.37.0.119
16	10.37.0.120/29	10.37.0.121 – 10.37.0.126	10.37.0.127
17	10.37.0.128/29	10.37.0.129 – 10.37.0.134	10.37.0.135
18	10.37.0.136/29	10.37.0.137 – 10.37.0.142	10.37.0.143
19	10.37.0.144/29	10.37.0.145 – 10.37.0.150	10.37.0.151
20	10.37.0.152/29	10.37.0.153 – 10.37.0.158	10.37.0.159
21	10.37.0.160/29	10.37.0.161 – 10.37.0.166	10.37.0.167
22	10.37.0.168/29	10.37.0.169 – 10.37.0.174	10.37.0.175
23	10.37.0.176/29	10.37.0.177 – 10.37.0.182	10.37.0.183
24	10.37.0.184/29	10.37.0.185 – 10.37.0.190	10.37.0.191
25	10.37.0.192/29	10.37.0.193 – 10.37.0.198	10.37.0.199
26	10.37.0.200/29	10.37.0.201 – 10.37.0.206	10.37.0.207
27	10.37.0.208/29	10.37.0.209 – 10.37.0.214	10.37.0.215
28	10.37.0.216/29	10.37.0.217 – 10.37.0.222	10.37.0.223
29	10.37.0.224/29	10.37.0.225 – 10.37.0.230	10.37.0.231
30	10.37.0.232/29	10.37.0.233 – 10.37.0.238	10.37.0.239
31	10.37.0.240/29	10.37.0.241 – 10.37.0.246	10.37.0.247
32	10.37.0.248/29	10.37.0.249 – 10.37.0.254	10.37.0.255
33	10.37.1.0/29	10.37.1.1 – 10.37.1.6	10.37.1.7
34	10.37.1.8/29	10.37.1.9 – 10.37.1.14	10.37.1.15
35	10.37.1.16/29	10.37.1.17 – 10.37.1.22	10.37.1.23
36	10.37.1.24/29	10.37.1.25 – 10.37.1.30	10.37.1.31
37	10.37.1.32/29	10.37.1.33 – 10.37.1.38	10.37.1.39
38	10.37.1.40/29	10.37.1.41 – 10.37.1.46	10.37.1.47
39	10.37.1.48/29	10.37.1.49 – 10.37.1.54	10.37.1.55
40	10.37.1.56/29	10.37.1.57 – 10.37.1.62	10.37.1.63
41	10.37.1.64/29	10.37.1.65 – 10.37.1.70	10.37.1.71
42	10.37.1.72/29	10.37.1.73 – 10.37.1.78	10.37.1.79
43	10.37.1.80/29	10.37.1.81 – 10.37.1.86	10.37.1.87
44	10.37.1.88/29	10.37.1.89 – 10.37.1.94	10.37.1.95
45	10.37.1.96/29	10.37.1.97 – 10.37.1.102	10.37.1.103
46	10.37.1.104/29	10.37.1.105 – 10.37.1.110	10.37.1.111
47	10.37.1.112/29	10.37.1.113 – 10.37.1.118	10.37.1.119
48	10.37.1.120/29	10.37.1.121 – 10.37.1.126	10.37.1.127
49	10.37.1.128/29	10.37.1.129 – 10.37.1.134	10.37.1.135
50	10.37.1.136/29	10.37.1.137 – 10.37.1.142	10.37.1.143
51	10.37.1.144/29	10.37.1.145 – 10.37.1.150	10.37.1.151
52	10.37.1.152/29	10.37.1.153 – 10.37.1.158	10.37.1.159
53	10.37.1.160/29	10.37.1.161 – 10.37.1.166	10.37.1.167
54	10.37.1.168/29	10.37.1.169 – 10.37.1.174	10.37.1.175
55	10.37.1.176/29	10.37.1.177 – 10.37.1.182	10.37.1.183
56	10.37.1.184/29	10.37.1.185 – 10.37.1.190	10.37.1.191
57	10.37.1.192/29	10.37.1.193 – 10.37.1.198	10.37.1.199
58	10.37.1.200/29	10.37.1.201 – 10.37.1.206	10.37.1.207
59	10.37.1.208/29	10.37.1.209 – 10.37.1.214	10.37.1.215
60	10.37.1.216/29	10.37.1.217 – 10.37.1.222	10.37.1.223
61	10.37.1.224/29	10.37.1.225 – 10.37.1.230	10.37.1.231
62	10.37.1.232/29	10.37.1.233 – 10.37.1.238	10.37.1.239
63	10.37.1.240/29	10.37.1.241 – 10.37.1.246	10.37.1.247
64	10.37.1.248/29	10.37.1.249 – 10.37.1.254	10.37.1.255
65	10.37.2.0/29	10.37.2.1 – 10.37.2.6	10.37.2.7
66	10.37.2.8/29	10.37.2.9 – 10.37.2.14	10.37.2.15
67	10.37.2.16/29	10.37.2.17 – 10.37.2.22	10.37.2.23
68	10.37.2.24/29	10.37.2.25 – 10.37.2.30	10.37.2.31
69	10.37.2.32/29	10.37.2.33 – 10.37.2.38	10.37.2.39
70	10.37.2.40/29	10.37.2.41 – 10.37.2.46	10.37.2.47
71	10.37.2.48/29	10.37.2.49 – 10.37.2.54	10.37.2.55
72	10.37.2.56/29	10.37.2.57 – 10.37.2.62	10.37.2.63
73	10.37.2.64/29	10.37.2.65 – 10.37.2.70	10.37.2.71
74	10.37.2.72/29	10.37.2.73 – 10.37.2.78	10.37.2.79
75	10.37.2.80/29	10.37.2.81 – 10.37.2.86	10.37.2.87
76	10.37.2.88/29	10.37.2.89 – 10.37.2.94	10.37.2.95
77	10.37.2.96/29	10.37.2.97 – 10.37.2.102	10.37.2.103
78	10.37.2.104/29	10.37.2.105 – 10.37.2.110	10.37.2.111
79	10.37.2.112/29	10.37.2.113 – 10.37.2.118	10.37.2.119
80	10.37.2.120/29	10.37.2.121 – 10.37.2.126	10.37.2.127
81	10.37.2.128/29	10.37.2.129 – 10.37.2.134	10.37.2.135
82	10.37.2.136/29	10.37.2.137 – 10.37.2.142	10.37.2.143
83	10.37.2.144/29	10.37.2.145 – 10.37.2.150	10.37.2.151
84	10.37.2.152/29	10.37.2.153 – 10.37.2.158	10.37.2.159
85	10.37.2.160/29	10.37.2.161 – 10.37.2.166	10.37.2.167
86	10.37.2.168/29	10.37.2.169 – 10.37.2.174	10.37.2.175
87	10.37.2.176/29	10.37.2.177 – 10.37.2.182	10.37.2.183
88	10.37.2.184/29	10.37.2.185 – 10.37.2.190	10.37.2.191
89	10.37.2.192/29	10.37.2.193 – 10.37.2.198	10.37.2.199
90	10.37.2.200/29	10.37.2.201 – 10.37.2.206	10.37.2.207
91	10.37.2.208/29	10.37.2.209 – 10.37.2.214	10.37.2.215
92	10.37.2.216/29	10.37.2.217 – 10.37.2.222	10.37.2.223
93	10.37.2.224/29	10.37.2.225 – 10.37.2.230	10.37.2.231
94	10.37.2.232/29	10.37.2.233 – 10.37.2.238	10.37.2.239
95	10.37.2.240/29	10.37.2.241 – 10.37.2.246	10.37.2.247
96	10.37.2.248/29	10.37.2.249 – 10.37.2.254	10.37.2.255
97	10.37.3.0/29	10.37.3.1 – 10.37.3.6	10.37.3.7
98	10.37.3.8/29	10.37.3.9 – 10.37.3.14	10.37.3.15
99	10.37.3.16/29	10.37.3.17 – 10.37.3.22	10.37.3.23
100	10.37.3.24/29	10.37.3.25 – 10.37.3.30	10.37.3.31
101	10.37.3.32/29	10.37.3.33 – 10.37.3.38	10.37.3.39
102	10.37.3.40/29	10.37.3.41 – 10.37.3.46	10.37.3.47
103	10.37.3.48/29	10.37.3.49 – 10.37.3.54	10.37.3.55
104	10.37.3.56/29	10.37.3.57 – 10.37.3.62	10.37.3.63
105	10.37.3.64/29	10.37.3.65 – 10.37.3.70	10.37.3.71
106	10.37.3.72/29	10.37.3.73 – 10.37.3.78	10.37.3.79
107	10.37.3.80/29	10.37.3.81 – 10.37.3.86	10.37.3.87
108	10.37.3.88/29	10.37.3.89 – 10.37.3.94	10.37.3.95
109	10.37.3.96/29	10.37.3.97 – 10.37.3.102	10.37.3.103
110	10.37.3.104/29	10.37.3.105 – 10.37.3.110	10.37.3.111
111	10.37.3.112/29	10.37.3.113 – 10.37.3.118	10.37.3.119
112	10.37.3.120/29	10.37.3.121 – 10.37.3.126	10.37.3.127
113	10.37.3.128/29	10.37.3.129 – 10.37.3.134	10.37.3.135
114	10.37.3.136/29	10.37.3.137 – 10.37.3.142	10.37.3.143
115	10.37.3.144/29	10.37.3.145 – 10.37.3.150	10.37.3.151
116	10.37.3.152/29	10.37.3.153 – 10.37.3.158	10.37.3.159
117	10.37.3.160/29	10.37.3.161 – 10.37.3.166	10.37.3.167
118	10.37.3.168/29	10.37.3.169 – 10.37.3.174	10.37.3.175
119	10.37.3.176/29	10.37.3.177 – 10.37.3.182	10.37.3.183
120	10.37.3.184/29	10.37.3.185 – 10.37.3.190	10.37.3.191
121	10.37.3.192/29	10.37.3.193 – 10.37.3.198	10.37.3.199
122	10.37.3.200/29	10.37.3.201 – 10.37.3.206	10.37.3.207
123	10.37.3.208/29	10.37.3.209 – 10.37.3.214	10.37.3.215
124	10.37.3.216/29	10.37.3.217 – 10.37.3.222	10.37.3.223
125	10.37.3.224/29	10.37.3.225 – 10.37.3.230	10.37.3.231
126	10.37.3.232/29	10.37.3.233 – 10.37.3.238	10.37.3.239
127	10.37.3.240/29	10.37.3.241 – 10.37.3.246	10.37.3.247
128	10.37.3.248/29	10.37.3.249 – 10.37.3.254	10.37.3.255

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 →