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)10.1.72.0/22

network10.1.72.0/22

broadcast10.1.75.255

first host10.1.72.1

last host10.1.75.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.1.72.0/22

address00001010.00000001.01001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000001.01001000.00000000

broadcast00001010.00000001.01001011.11111111

green = network part, grey = host part

hex0x0a014800

decimal167856128

reverse dns0.72.1.10.in-addr.arpa

ipv4-mapped::ffff:a01:4800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.1.72.0/29	10.1.72.1 – 10.1.72.6	10.1.72.7
2	10.1.72.8/29	10.1.72.9 – 10.1.72.14	10.1.72.15
3	10.1.72.16/29	10.1.72.17 – 10.1.72.22	10.1.72.23
4	10.1.72.24/29	10.1.72.25 – 10.1.72.30	10.1.72.31
5	10.1.72.32/29	10.1.72.33 – 10.1.72.38	10.1.72.39
6	10.1.72.40/29	10.1.72.41 – 10.1.72.46	10.1.72.47
7	10.1.72.48/29	10.1.72.49 – 10.1.72.54	10.1.72.55
8	10.1.72.56/29	10.1.72.57 – 10.1.72.62	10.1.72.63
9	10.1.72.64/29	10.1.72.65 – 10.1.72.70	10.1.72.71
10	10.1.72.72/29	10.1.72.73 – 10.1.72.78	10.1.72.79
11	10.1.72.80/29	10.1.72.81 – 10.1.72.86	10.1.72.87
12	10.1.72.88/29	10.1.72.89 – 10.1.72.94	10.1.72.95
13	10.1.72.96/29	10.1.72.97 – 10.1.72.102	10.1.72.103
14	10.1.72.104/29	10.1.72.105 – 10.1.72.110	10.1.72.111
15	10.1.72.112/29	10.1.72.113 – 10.1.72.118	10.1.72.119
16	10.1.72.120/29	10.1.72.121 – 10.1.72.126	10.1.72.127
17	10.1.72.128/29	10.1.72.129 – 10.1.72.134	10.1.72.135
18	10.1.72.136/29	10.1.72.137 – 10.1.72.142	10.1.72.143
19	10.1.72.144/29	10.1.72.145 – 10.1.72.150	10.1.72.151
20	10.1.72.152/29	10.1.72.153 – 10.1.72.158	10.1.72.159
21	10.1.72.160/29	10.1.72.161 – 10.1.72.166	10.1.72.167
22	10.1.72.168/29	10.1.72.169 – 10.1.72.174	10.1.72.175
23	10.1.72.176/29	10.1.72.177 – 10.1.72.182	10.1.72.183
24	10.1.72.184/29	10.1.72.185 – 10.1.72.190	10.1.72.191
25	10.1.72.192/29	10.1.72.193 – 10.1.72.198	10.1.72.199
26	10.1.72.200/29	10.1.72.201 – 10.1.72.206	10.1.72.207
27	10.1.72.208/29	10.1.72.209 – 10.1.72.214	10.1.72.215
28	10.1.72.216/29	10.1.72.217 – 10.1.72.222	10.1.72.223
29	10.1.72.224/29	10.1.72.225 – 10.1.72.230	10.1.72.231
30	10.1.72.232/29	10.1.72.233 – 10.1.72.238	10.1.72.239
31	10.1.72.240/29	10.1.72.241 – 10.1.72.246	10.1.72.247
32	10.1.72.248/29	10.1.72.249 – 10.1.72.254	10.1.72.255
33	10.1.73.0/29	10.1.73.1 – 10.1.73.6	10.1.73.7
34	10.1.73.8/29	10.1.73.9 – 10.1.73.14	10.1.73.15
35	10.1.73.16/29	10.1.73.17 – 10.1.73.22	10.1.73.23
36	10.1.73.24/29	10.1.73.25 – 10.1.73.30	10.1.73.31
37	10.1.73.32/29	10.1.73.33 – 10.1.73.38	10.1.73.39
38	10.1.73.40/29	10.1.73.41 – 10.1.73.46	10.1.73.47
39	10.1.73.48/29	10.1.73.49 – 10.1.73.54	10.1.73.55
40	10.1.73.56/29	10.1.73.57 – 10.1.73.62	10.1.73.63
41	10.1.73.64/29	10.1.73.65 – 10.1.73.70	10.1.73.71
42	10.1.73.72/29	10.1.73.73 – 10.1.73.78	10.1.73.79
43	10.1.73.80/29	10.1.73.81 – 10.1.73.86	10.1.73.87
44	10.1.73.88/29	10.1.73.89 – 10.1.73.94	10.1.73.95
45	10.1.73.96/29	10.1.73.97 – 10.1.73.102	10.1.73.103
46	10.1.73.104/29	10.1.73.105 – 10.1.73.110	10.1.73.111
47	10.1.73.112/29	10.1.73.113 – 10.1.73.118	10.1.73.119
48	10.1.73.120/29	10.1.73.121 – 10.1.73.126	10.1.73.127
49	10.1.73.128/29	10.1.73.129 – 10.1.73.134	10.1.73.135
50	10.1.73.136/29	10.1.73.137 – 10.1.73.142	10.1.73.143
51	10.1.73.144/29	10.1.73.145 – 10.1.73.150	10.1.73.151
52	10.1.73.152/29	10.1.73.153 – 10.1.73.158	10.1.73.159
53	10.1.73.160/29	10.1.73.161 – 10.1.73.166	10.1.73.167
54	10.1.73.168/29	10.1.73.169 – 10.1.73.174	10.1.73.175
55	10.1.73.176/29	10.1.73.177 – 10.1.73.182	10.1.73.183
56	10.1.73.184/29	10.1.73.185 – 10.1.73.190	10.1.73.191
57	10.1.73.192/29	10.1.73.193 – 10.1.73.198	10.1.73.199
58	10.1.73.200/29	10.1.73.201 – 10.1.73.206	10.1.73.207
59	10.1.73.208/29	10.1.73.209 – 10.1.73.214	10.1.73.215
60	10.1.73.216/29	10.1.73.217 – 10.1.73.222	10.1.73.223
61	10.1.73.224/29	10.1.73.225 – 10.1.73.230	10.1.73.231
62	10.1.73.232/29	10.1.73.233 – 10.1.73.238	10.1.73.239
63	10.1.73.240/29	10.1.73.241 – 10.1.73.246	10.1.73.247
64	10.1.73.248/29	10.1.73.249 – 10.1.73.254	10.1.73.255
65	10.1.74.0/29	10.1.74.1 – 10.1.74.6	10.1.74.7
66	10.1.74.8/29	10.1.74.9 – 10.1.74.14	10.1.74.15
67	10.1.74.16/29	10.1.74.17 – 10.1.74.22	10.1.74.23
68	10.1.74.24/29	10.1.74.25 – 10.1.74.30	10.1.74.31
69	10.1.74.32/29	10.1.74.33 – 10.1.74.38	10.1.74.39
70	10.1.74.40/29	10.1.74.41 – 10.1.74.46	10.1.74.47
71	10.1.74.48/29	10.1.74.49 – 10.1.74.54	10.1.74.55
72	10.1.74.56/29	10.1.74.57 – 10.1.74.62	10.1.74.63
73	10.1.74.64/29	10.1.74.65 – 10.1.74.70	10.1.74.71
74	10.1.74.72/29	10.1.74.73 – 10.1.74.78	10.1.74.79
75	10.1.74.80/29	10.1.74.81 – 10.1.74.86	10.1.74.87
76	10.1.74.88/29	10.1.74.89 – 10.1.74.94	10.1.74.95
77	10.1.74.96/29	10.1.74.97 – 10.1.74.102	10.1.74.103
78	10.1.74.104/29	10.1.74.105 – 10.1.74.110	10.1.74.111
79	10.1.74.112/29	10.1.74.113 – 10.1.74.118	10.1.74.119
80	10.1.74.120/29	10.1.74.121 – 10.1.74.126	10.1.74.127
81	10.1.74.128/29	10.1.74.129 – 10.1.74.134	10.1.74.135
82	10.1.74.136/29	10.1.74.137 – 10.1.74.142	10.1.74.143
83	10.1.74.144/29	10.1.74.145 – 10.1.74.150	10.1.74.151
84	10.1.74.152/29	10.1.74.153 – 10.1.74.158	10.1.74.159
85	10.1.74.160/29	10.1.74.161 – 10.1.74.166	10.1.74.167
86	10.1.74.168/29	10.1.74.169 – 10.1.74.174	10.1.74.175
87	10.1.74.176/29	10.1.74.177 – 10.1.74.182	10.1.74.183
88	10.1.74.184/29	10.1.74.185 – 10.1.74.190	10.1.74.191
89	10.1.74.192/29	10.1.74.193 – 10.1.74.198	10.1.74.199
90	10.1.74.200/29	10.1.74.201 – 10.1.74.206	10.1.74.207
91	10.1.74.208/29	10.1.74.209 – 10.1.74.214	10.1.74.215
92	10.1.74.216/29	10.1.74.217 – 10.1.74.222	10.1.74.223
93	10.1.74.224/29	10.1.74.225 – 10.1.74.230	10.1.74.231
94	10.1.74.232/29	10.1.74.233 – 10.1.74.238	10.1.74.239
95	10.1.74.240/29	10.1.74.241 – 10.1.74.246	10.1.74.247
96	10.1.74.248/29	10.1.74.249 – 10.1.74.254	10.1.74.255
97	10.1.75.0/29	10.1.75.1 – 10.1.75.6	10.1.75.7
98	10.1.75.8/29	10.1.75.9 – 10.1.75.14	10.1.75.15
99	10.1.75.16/29	10.1.75.17 – 10.1.75.22	10.1.75.23
100	10.1.75.24/29	10.1.75.25 – 10.1.75.30	10.1.75.31
101	10.1.75.32/29	10.1.75.33 – 10.1.75.38	10.1.75.39
102	10.1.75.40/29	10.1.75.41 – 10.1.75.46	10.1.75.47
103	10.1.75.48/29	10.1.75.49 – 10.1.75.54	10.1.75.55
104	10.1.75.56/29	10.1.75.57 – 10.1.75.62	10.1.75.63
105	10.1.75.64/29	10.1.75.65 – 10.1.75.70	10.1.75.71
106	10.1.75.72/29	10.1.75.73 – 10.1.75.78	10.1.75.79
107	10.1.75.80/29	10.1.75.81 – 10.1.75.86	10.1.75.87
108	10.1.75.88/29	10.1.75.89 – 10.1.75.94	10.1.75.95
109	10.1.75.96/29	10.1.75.97 – 10.1.75.102	10.1.75.103
110	10.1.75.104/29	10.1.75.105 – 10.1.75.110	10.1.75.111
111	10.1.75.112/29	10.1.75.113 – 10.1.75.118	10.1.75.119
112	10.1.75.120/29	10.1.75.121 – 10.1.75.126	10.1.75.127
113	10.1.75.128/29	10.1.75.129 – 10.1.75.134	10.1.75.135
114	10.1.75.136/29	10.1.75.137 – 10.1.75.142	10.1.75.143
115	10.1.75.144/29	10.1.75.145 – 10.1.75.150	10.1.75.151
116	10.1.75.152/29	10.1.75.153 – 10.1.75.158	10.1.75.159
117	10.1.75.160/29	10.1.75.161 – 10.1.75.166	10.1.75.167
118	10.1.75.168/29	10.1.75.169 – 10.1.75.174	10.1.75.175
119	10.1.75.176/29	10.1.75.177 – 10.1.75.182	10.1.75.183
120	10.1.75.184/29	10.1.75.185 – 10.1.75.190	10.1.75.191
121	10.1.75.192/29	10.1.75.193 – 10.1.75.198	10.1.75.199
122	10.1.75.200/29	10.1.75.201 – 10.1.75.206	10.1.75.207
123	10.1.75.208/29	10.1.75.209 – 10.1.75.214	10.1.75.215
124	10.1.75.216/29	10.1.75.217 – 10.1.75.222	10.1.75.223
125	10.1.75.224/29	10.1.75.225 – 10.1.75.230	10.1.75.231
126	10.1.75.232/29	10.1.75.233 – 10.1.75.238	10.1.75.239
127	10.1.75.240/29	10.1.75.241 – 10.1.75.246	10.1.75.247
128	10.1.75.248/29	10.1.75.249 – 10.1.75.254	10.1.75.255

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 →