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)10.0.28.0/22

network10.0.28.0/22

broadcast10.0.31.255

first host10.0.28.1

last host10.0.31.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.0.28.0/22

address00001010.00000000.00011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000000.00011100.00000000

broadcast00001010.00000000.00011111.11111111

green = network part, grey = host part

hex0x0a001c00

decimal167779328

reverse dns0.28.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:1c00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.28.0/29	10.0.28.1 – 10.0.28.6	10.0.28.7
2	10.0.28.8/29	10.0.28.9 – 10.0.28.14	10.0.28.15
3	10.0.28.16/29	10.0.28.17 – 10.0.28.22	10.0.28.23
4	10.0.28.24/29	10.0.28.25 – 10.0.28.30	10.0.28.31
5	10.0.28.32/29	10.0.28.33 – 10.0.28.38	10.0.28.39
6	10.0.28.40/29	10.0.28.41 – 10.0.28.46	10.0.28.47
7	10.0.28.48/29	10.0.28.49 – 10.0.28.54	10.0.28.55
8	10.0.28.56/29	10.0.28.57 – 10.0.28.62	10.0.28.63
9	10.0.28.64/29	10.0.28.65 – 10.0.28.70	10.0.28.71
10	10.0.28.72/29	10.0.28.73 – 10.0.28.78	10.0.28.79
11	10.0.28.80/29	10.0.28.81 – 10.0.28.86	10.0.28.87
12	10.0.28.88/29	10.0.28.89 – 10.0.28.94	10.0.28.95
13	10.0.28.96/29	10.0.28.97 – 10.0.28.102	10.0.28.103
14	10.0.28.104/29	10.0.28.105 – 10.0.28.110	10.0.28.111
15	10.0.28.112/29	10.0.28.113 – 10.0.28.118	10.0.28.119
16	10.0.28.120/29	10.0.28.121 – 10.0.28.126	10.0.28.127
17	10.0.28.128/29	10.0.28.129 – 10.0.28.134	10.0.28.135
18	10.0.28.136/29	10.0.28.137 – 10.0.28.142	10.0.28.143
19	10.0.28.144/29	10.0.28.145 – 10.0.28.150	10.0.28.151
20	10.0.28.152/29	10.0.28.153 – 10.0.28.158	10.0.28.159
21	10.0.28.160/29	10.0.28.161 – 10.0.28.166	10.0.28.167
22	10.0.28.168/29	10.0.28.169 – 10.0.28.174	10.0.28.175
23	10.0.28.176/29	10.0.28.177 – 10.0.28.182	10.0.28.183
24	10.0.28.184/29	10.0.28.185 – 10.0.28.190	10.0.28.191
25	10.0.28.192/29	10.0.28.193 – 10.0.28.198	10.0.28.199
26	10.0.28.200/29	10.0.28.201 – 10.0.28.206	10.0.28.207
27	10.0.28.208/29	10.0.28.209 – 10.0.28.214	10.0.28.215
28	10.0.28.216/29	10.0.28.217 – 10.0.28.222	10.0.28.223
29	10.0.28.224/29	10.0.28.225 – 10.0.28.230	10.0.28.231
30	10.0.28.232/29	10.0.28.233 – 10.0.28.238	10.0.28.239
31	10.0.28.240/29	10.0.28.241 – 10.0.28.246	10.0.28.247
32	10.0.28.248/29	10.0.28.249 – 10.0.28.254	10.0.28.255
33	10.0.29.0/29	10.0.29.1 – 10.0.29.6	10.0.29.7
34	10.0.29.8/29	10.0.29.9 – 10.0.29.14	10.0.29.15
35	10.0.29.16/29	10.0.29.17 – 10.0.29.22	10.0.29.23
36	10.0.29.24/29	10.0.29.25 – 10.0.29.30	10.0.29.31
37	10.0.29.32/29	10.0.29.33 – 10.0.29.38	10.0.29.39
38	10.0.29.40/29	10.0.29.41 – 10.0.29.46	10.0.29.47
39	10.0.29.48/29	10.0.29.49 – 10.0.29.54	10.0.29.55
40	10.0.29.56/29	10.0.29.57 – 10.0.29.62	10.0.29.63
41	10.0.29.64/29	10.0.29.65 – 10.0.29.70	10.0.29.71
42	10.0.29.72/29	10.0.29.73 – 10.0.29.78	10.0.29.79
43	10.0.29.80/29	10.0.29.81 – 10.0.29.86	10.0.29.87
44	10.0.29.88/29	10.0.29.89 – 10.0.29.94	10.0.29.95
45	10.0.29.96/29	10.0.29.97 – 10.0.29.102	10.0.29.103
46	10.0.29.104/29	10.0.29.105 – 10.0.29.110	10.0.29.111
47	10.0.29.112/29	10.0.29.113 – 10.0.29.118	10.0.29.119
48	10.0.29.120/29	10.0.29.121 – 10.0.29.126	10.0.29.127
49	10.0.29.128/29	10.0.29.129 – 10.0.29.134	10.0.29.135
50	10.0.29.136/29	10.0.29.137 – 10.0.29.142	10.0.29.143
51	10.0.29.144/29	10.0.29.145 – 10.0.29.150	10.0.29.151
52	10.0.29.152/29	10.0.29.153 – 10.0.29.158	10.0.29.159
53	10.0.29.160/29	10.0.29.161 – 10.0.29.166	10.0.29.167
54	10.0.29.168/29	10.0.29.169 – 10.0.29.174	10.0.29.175
55	10.0.29.176/29	10.0.29.177 – 10.0.29.182	10.0.29.183
56	10.0.29.184/29	10.0.29.185 – 10.0.29.190	10.0.29.191
57	10.0.29.192/29	10.0.29.193 – 10.0.29.198	10.0.29.199
58	10.0.29.200/29	10.0.29.201 – 10.0.29.206	10.0.29.207
59	10.0.29.208/29	10.0.29.209 – 10.0.29.214	10.0.29.215
60	10.0.29.216/29	10.0.29.217 – 10.0.29.222	10.0.29.223
61	10.0.29.224/29	10.0.29.225 – 10.0.29.230	10.0.29.231
62	10.0.29.232/29	10.0.29.233 – 10.0.29.238	10.0.29.239
63	10.0.29.240/29	10.0.29.241 – 10.0.29.246	10.0.29.247
64	10.0.29.248/29	10.0.29.249 – 10.0.29.254	10.0.29.255
65	10.0.30.0/29	10.0.30.1 – 10.0.30.6	10.0.30.7
66	10.0.30.8/29	10.0.30.9 – 10.0.30.14	10.0.30.15
67	10.0.30.16/29	10.0.30.17 – 10.0.30.22	10.0.30.23
68	10.0.30.24/29	10.0.30.25 – 10.0.30.30	10.0.30.31
69	10.0.30.32/29	10.0.30.33 – 10.0.30.38	10.0.30.39
70	10.0.30.40/29	10.0.30.41 – 10.0.30.46	10.0.30.47
71	10.0.30.48/29	10.0.30.49 – 10.0.30.54	10.0.30.55
72	10.0.30.56/29	10.0.30.57 – 10.0.30.62	10.0.30.63
73	10.0.30.64/29	10.0.30.65 – 10.0.30.70	10.0.30.71
74	10.0.30.72/29	10.0.30.73 – 10.0.30.78	10.0.30.79
75	10.0.30.80/29	10.0.30.81 – 10.0.30.86	10.0.30.87
76	10.0.30.88/29	10.0.30.89 – 10.0.30.94	10.0.30.95
77	10.0.30.96/29	10.0.30.97 – 10.0.30.102	10.0.30.103
78	10.0.30.104/29	10.0.30.105 – 10.0.30.110	10.0.30.111
79	10.0.30.112/29	10.0.30.113 – 10.0.30.118	10.0.30.119
80	10.0.30.120/29	10.0.30.121 – 10.0.30.126	10.0.30.127
81	10.0.30.128/29	10.0.30.129 – 10.0.30.134	10.0.30.135
82	10.0.30.136/29	10.0.30.137 – 10.0.30.142	10.0.30.143
83	10.0.30.144/29	10.0.30.145 – 10.0.30.150	10.0.30.151
84	10.0.30.152/29	10.0.30.153 – 10.0.30.158	10.0.30.159
85	10.0.30.160/29	10.0.30.161 – 10.0.30.166	10.0.30.167
86	10.0.30.168/29	10.0.30.169 – 10.0.30.174	10.0.30.175
87	10.0.30.176/29	10.0.30.177 – 10.0.30.182	10.0.30.183
88	10.0.30.184/29	10.0.30.185 – 10.0.30.190	10.0.30.191
89	10.0.30.192/29	10.0.30.193 – 10.0.30.198	10.0.30.199
90	10.0.30.200/29	10.0.30.201 – 10.0.30.206	10.0.30.207
91	10.0.30.208/29	10.0.30.209 – 10.0.30.214	10.0.30.215
92	10.0.30.216/29	10.0.30.217 – 10.0.30.222	10.0.30.223
93	10.0.30.224/29	10.0.30.225 – 10.0.30.230	10.0.30.231
94	10.0.30.232/29	10.0.30.233 – 10.0.30.238	10.0.30.239
95	10.0.30.240/29	10.0.30.241 – 10.0.30.246	10.0.30.247
96	10.0.30.248/29	10.0.30.249 – 10.0.30.254	10.0.30.255
97	10.0.31.0/29	10.0.31.1 – 10.0.31.6	10.0.31.7
98	10.0.31.8/29	10.0.31.9 – 10.0.31.14	10.0.31.15
99	10.0.31.16/29	10.0.31.17 – 10.0.31.22	10.0.31.23
100	10.0.31.24/29	10.0.31.25 – 10.0.31.30	10.0.31.31
101	10.0.31.32/29	10.0.31.33 – 10.0.31.38	10.0.31.39
102	10.0.31.40/29	10.0.31.41 – 10.0.31.46	10.0.31.47
103	10.0.31.48/29	10.0.31.49 – 10.0.31.54	10.0.31.55
104	10.0.31.56/29	10.0.31.57 – 10.0.31.62	10.0.31.63
105	10.0.31.64/29	10.0.31.65 – 10.0.31.70	10.0.31.71
106	10.0.31.72/29	10.0.31.73 – 10.0.31.78	10.0.31.79
107	10.0.31.80/29	10.0.31.81 – 10.0.31.86	10.0.31.87
108	10.0.31.88/29	10.0.31.89 – 10.0.31.94	10.0.31.95
109	10.0.31.96/29	10.0.31.97 – 10.0.31.102	10.0.31.103
110	10.0.31.104/29	10.0.31.105 – 10.0.31.110	10.0.31.111
111	10.0.31.112/29	10.0.31.113 – 10.0.31.118	10.0.31.119
112	10.0.31.120/29	10.0.31.121 – 10.0.31.126	10.0.31.127
113	10.0.31.128/29	10.0.31.129 – 10.0.31.134	10.0.31.135
114	10.0.31.136/29	10.0.31.137 – 10.0.31.142	10.0.31.143
115	10.0.31.144/29	10.0.31.145 – 10.0.31.150	10.0.31.151
116	10.0.31.152/29	10.0.31.153 – 10.0.31.158	10.0.31.159
117	10.0.31.160/29	10.0.31.161 – 10.0.31.166	10.0.31.167
118	10.0.31.168/29	10.0.31.169 – 10.0.31.174	10.0.31.175
119	10.0.31.176/29	10.0.31.177 – 10.0.31.182	10.0.31.183
120	10.0.31.184/29	10.0.31.185 – 10.0.31.190	10.0.31.191
121	10.0.31.192/29	10.0.31.193 – 10.0.31.198	10.0.31.199
122	10.0.31.200/29	10.0.31.201 – 10.0.31.206	10.0.31.207
123	10.0.31.208/29	10.0.31.209 – 10.0.31.214	10.0.31.215
124	10.0.31.216/29	10.0.31.217 – 10.0.31.222	10.0.31.223
125	10.0.31.224/29	10.0.31.225 – 10.0.31.230	10.0.31.231
126	10.0.31.232/29	10.0.31.233 – 10.0.31.238	10.0.31.239
127	10.0.31.240/29	10.0.31.241 – 10.0.31.246	10.0.31.247
128	10.0.31.248/29	10.0.31.249 – 10.0.31.254	10.0.31.255

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 →