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)10.243.36.0/22

network10.243.36.0/22

broadcast10.243.39.255

first host10.243.36.1

last host10.243.39.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.243.36.0/22

address00001010.11110011.00100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.11110011.00100100.00000000

broadcast00001010.11110011.00100111.11111111

green = network part, grey = host part

hex0x0af32400

decimal183706624

reverse dns0.36.243.10.in-addr.arpa

ipv4-mapped::ffff:af3:2400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.243.36.0/29	10.243.36.1 – 10.243.36.6	10.243.36.7
2	10.243.36.8/29	10.243.36.9 – 10.243.36.14	10.243.36.15
3	10.243.36.16/29	10.243.36.17 – 10.243.36.22	10.243.36.23
4	10.243.36.24/29	10.243.36.25 – 10.243.36.30	10.243.36.31
5	10.243.36.32/29	10.243.36.33 – 10.243.36.38	10.243.36.39
6	10.243.36.40/29	10.243.36.41 – 10.243.36.46	10.243.36.47
7	10.243.36.48/29	10.243.36.49 – 10.243.36.54	10.243.36.55
8	10.243.36.56/29	10.243.36.57 – 10.243.36.62	10.243.36.63
9	10.243.36.64/29	10.243.36.65 – 10.243.36.70	10.243.36.71
10	10.243.36.72/29	10.243.36.73 – 10.243.36.78	10.243.36.79
11	10.243.36.80/29	10.243.36.81 – 10.243.36.86	10.243.36.87
12	10.243.36.88/29	10.243.36.89 – 10.243.36.94	10.243.36.95
13	10.243.36.96/29	10.243.36.97 – 10.243.36.102	10.243.36.103
14	10.243.36.104/29	10.243.36.105 – 10.243.36.110	10.243.36.111
15	10.243.36.112/29	10.243.36.113 – 10.243.36.118	10.243.36.119
16	10.243.36.120/29	10.243.36.121 – 10.243.36.126	10.243.36.127
17	10.243.36.128/29	10.243.36.129 – 10.243.36.134	10.243.36.135
18	10.243.36.136/29	10.243.36.137 – 10.243.36.142	10.243.36.143
19	10.243.36.144/29	10.243.36.145 – 10.243.36.150	10.243.36.151
20	10.243.36.152/29	10.243.36.153 – 10.243.36.158	10.243.36.159
21	10.243.36.160/29	10.243.36.161 – 10.243.36.166	10.243.36.167
22	10.243.36.168/29	10.243.36.169 – 10.243.36.174	10.243.36.175
23	10.243.36.176/29	10.243.36.177 – 10.243.36.182	10.243.36.183
24	10.243.36.184/29	10.243.36.185 – 10.243.36.190	10.243.36.191
25	10.243.36.192/29	10.243.36.193 – 10.243.36.198	10.243.36.199
26	10.243.36.200/29	10.243.36.201 – 10.243.36.206	10.243.36.207
27	10.243.36.208/29	10.243.36.209 – 10.243.36.214	10.243.36.215
28	10.243.36.216/29	10.243.36.217 – 10.243.36.222	10.243.36.223
29	10.243.36.224/29	10.243.36.225 – 10.243.36.230	10.243.36.231
30	10.243.36.232/29	10.243.36.233 – 10.243.36.238	10.243.36.239
31	10.243.36.240/29	10.243.36.241 – 10.243.36.246	10.243.36.247
32	10.243.36.248/29	10.243.36.249 – 10.243.36.254	10.243.36.255
33	10.243.37.0/29	10.243.37.1 – 10.243.37.6	10.243.37.7
34	10.243.37.8/29	10.243.37.9 – 10.243.37.14	10.243.37.15
35	10.243.37.16/29	10.243.37.17 – 10.243.37.22	10.243.37.23
36	10.243.37.24/29	10.243.37.25 – 10.243.37.30	10.243.37.31
37	10.243.37.32/29	10.243.37.33 – 10.243.37.38	10.243.37.39
38	10.243.37.40/29	10.243.37.41 – 10.243.37.46	10.243.37.47
39	10.243.37.48/29	10.243.37.49 – 10.243.37.54	10.243.37.55
40	10.243.37.56/29	10.243.37.57 – 10.243.37.62	10.243.37.63
41	10.243.37.64/29	10.243.37.65 – 10.243.37.70	10.243.37.71
42	10.243.37.72/29	10.243.37.73 – 10.243.37.78	10.243.37.79
43	10.243.37.80/29	10.243.37.81 – 10.243.37.86	10.243.37.87
44	10.243.37.88/29	10.243.37.89 – 10.243.37.94	10.243.37.95
45	10.243.37.96/29	10.243.37.97 – 10.243.37.102	10.243.37.103
46	10.243.37.104/29	10.243.37.105 – 10.243.37.110	10.243.37.111
47	10.243.37.112/29	10.243.37.113 – 10.243.37.118	10.243.37.119
48	10.243.37.120/29	10.243.37.121 – 10.243.37.126	10.243.37.127
49	10.243.37.128/29	10.243.37.129 – 10.243.37.134	10.243.37.135
50	10.243.37.136/29	10.243.37.137 – 10.243.37.142	10.243.37.143
51	10.243.37.144/29	10.243.37.145 – 10.243.37.150	10.243.37.151
52	10.243.37.152/29	10.243.37.153 – 10.243.37.158	10.243.37.159
53	10.243.37.160/29	10.243.37.161 – 10.243.37.166	10.243.37.167
54	10.243.37.168/29	10.243.37.169 – 10.243.37.174	10.243.37.175
55	10.243.37.176/29	10.243.37.177 – 10.243.37.182	10.243.37.183
56	10.243.37.184/29	10.243.37.185 – 10.243.37.190	10.243.37.191
57	10.243.37.192/29	10.243.37.193 – 10.243.37.198	10.243.37.199
58	10.243.37.200/29	10.243.37.201 – 10.243.37.206	10.243.37.207
59	10.243.37.208/29	10.243.37.209 – 10.243.37.214	10.243.37.215
60	10.243.37.216/29	10.243.37.217 – 10.243.37.222	10.243.37.223
61	10.243.37.224/29	10.243.37.225 – 10.243.37.230	10.243.37.231
62	10.243.37.232/29	10.243.37.233 – 10.243.37.238	10.243.37.239
63	10.243.37.240/29	10.243.37.241 – 10.243.37.246	10.243.37.247
64	10.243.37.248/29	10.243.37.249 – 10.243.37.254	10.243.37.255
65	10.243.38.0/29	10.243.38.1 – 10.243.38.6	10.243.38.7
66	10.243.38.8/29	10.243.38.9 – 10.243.38.14	10.243.38.15
67	10.243.38.16/29	10.243.38.17 – 10.243.38.22	10.243.38.23
68	10.243.38.24/29	10.243.38.25 – 10.243.38.30	10.243.38.31
69	10.243.38.32/29	10.243.38.33 – 10.243.38.38	10.243.38.39
70	10.243.38.40/29	10.243.38.41 – 10.243.38.46	10.243.38.47
71	10.243.38.48/29	10.243.38.49 – 10.243.38.54	10.243.38.55
72	10.243.38.56/29	10.243.38.57 – 10.243.38.62	10.243.38.63
73	10.243.38.64/29	10.243.38.65 – 10.243.38.70	10.243.38.71
74	10.243.38.72/29	10.243.38.73 – 10.243.38.78	10.243.38.79
75	10.243.38.80/29	10.243.38.81 – 10.243.38.86	10.243.38.87
76	10.243.38.88/29	10.243.38.89 – 10.243.38.94	10.243.38.95
77	10.243.38.96/29	10.243.38.97 – 10.243.38.102	10.243.38.103
78	10.243.38.104/29	10.243.38.105 – 10.243.38.110	10.243.38.111
79	10.243.38.112/29	10.243.38.113 – 10.243.38.118	10.243.38.119
80	10.243.38.120/29	10.243.38.121 – 10.243.38.126	10.243.38.127
81	10.243.38.128/29	10.243.38.129 – 10.243.38.134	10.243.38.135
82	10.243.38.136/29	10.243.38.137 – 10.243.38.142	10.243.38.143
83	10.243.38.144/29	10.243.38.145 – 10.243.38.150	10.243.38.151
84	10.243.38.152/29	10.243.38.153 – 10.243.38.158	10.243.38.159
85	10.243.38.160/29	10.243.38.161 – 10.243.38.166	10.243.38.167
86	10.243.38.168/29	10.243.38.169 – 10.243.38.174	10.243.38.175
87	10.243.38.176/29	10.243.38.177 – 10.243.38.182	10.243.38.183
88	10.243.38.184/29	10.243.38.185 – 10.243.38.190	10.243.38.191
89	10.243.38.192/29	10.243.38.193 – 10.243.38.198	10.243.38.199
90	10.243.38.200/29	10.243.38.201 – 10.243.38.206	10.243.38.207
91	10.243.38.208/29	10.243.38.209 – 10.243.38.214	10.243.38.215
92	10.243.38.216/29	10.243.38.217 – 10.243.38.222	10.243.38.223
93	10.243.38.224/29	10.243.38.225 – 10.243.38.230	10.243.38.231
94	10.243.38.232/29	10.243.38.233 – 10.243.38.238	10.243.38.239
95	10.243.38.240/29	10.243.38.241 – 10.243.38.246	10.243.38.247
96	10.243.38.248/29	10.243.38.249 – 10.243.38.254	10.243.38.255
97	10.243.39.0/29	10.243.39.1 – 10.243.39.6	10.243.39.7
98	10.243.39.8/29	10.243.39.9 – 10.243.39.14	10.243.39.15
99	10.243.39.16/29	10.243.39.17 – 10.243.39.22	10.243.39.23
100	10.243.39.24/29	10.243.39.25 – 10.243.39.30	10.243.39.31
101	10.243.39.32/29	10.243.39.33 – 10.243.39.38	10.243.39.39
102	10.243.39.40/29	10.243.39.41 – 10.243.39.46	10.243.39.47
103	10.243.39.48/29	10.243.39.49 – 10.243.39.54	10.243.39.55
104	10.243.39.56/29	10.243.39.57 – 10.243.39.62	10.243.39.63
105	10.243.39.64/29	10.243.39.65 – 10.243.39.70	10.243.39.71
106	10.243.39.72/29	10.243.39.73 – 10.243.39.78	10.243.39.79
107	10.243.39.80/29	10.243.39.81 – 10.243.39.86	10.243.39.87
108	10.243.39.88/29	10.243.39.89 – 10.243.39.94	10.243.39.95
109	10.243.39.96/29	10.243.39.97 – 10.243.39.102	10.243.39.103
110	10.243.39.104/29	10.243.39.105 – 10.243.39.110	10.243.39.111
111	10.243.39.112/29	10.243.39.113 – 10.243.39.118	10.243.39.119
112	10.243.39.120/29	10.243.39.121 – 10.243.39.126	10.243.39.127
113	10.243.39.128/29	10.243.39.129 – 10.243.39.134	10.243.39.135
114	10.243.39.136/29	10.243.39.137 – 10.243.39.142	10.243.39.143
115	10.243.39.144/29	10.243.39.145 – 10.243.39.150	10.243.39.151
116	10.243.39.152/29	10.243.39.153 – 10.243.39.158	10.243.39.159
117	10.243.39.160/29	10.243.39.161 – 10.243.39.166	10.243.39.167
118	10.243.39.168/29	10.243.39.169 – 10.243.39.174	10.243.39.175
119	10.243.39.176/29	10.243.39.177 – 10.243.39.182	10.243.39.183
120	10.243.39.184/29	10.243.39.185 – 10.243.39.190	10.243.39.191
121	10.243.39.192/29	10.243.39.193 – 10.243.39.198	10.243.39.199
122	10.243.39.200/29	10.243.39.201 – 10.243.39.206	10.243.39.207
123	10.243.39.208/29	10.243.39.209 – 10.243.39.214	10.243.39.215
124	10.243.39.216/29	10.243.39.217 – 10.243.39.222	10.243.39.223
125	10.243.39.224/29	10.243.39.225 – 10.243.39.230	10.243.39.231
126	10.243.39.232/29	10.243.39.233 – 10.243.39.238	10.243.39.239
127	10.243.39.240/29	10.243.39.241 – 10.243.39.246	10.243.39.247
128	10.243.39.248/29	10.243.39.249 – 10.243.39.254	10.243.39.255

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 →