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)10.2.204.0/22

network10.2.204.0/22

broadcast10.2.207.255

first host10.2.204.1

last host10.2.207.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.204.0/22

address00001010.00000010.11001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.11001100.00000000

broadcast00001010.00000010.11001111.11111111

green = network part, grey = host part

hex0x0a02cc00

decimal167955456

reverse dns0.204.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:cc00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.204.0/29	10.2.204.1 – 10.2.204.6	10.2.204.7
2	10.2.204.8/29	10.2.204.9 – 10.2.204.14	10.2.204.15
3	10.2.204.16/29	10.2.204.17 – 10.2.204.22	10.2.204.23
4	10.2.204.24/29	10.2.204.25 – 10.2.204.30	10.2.204.31
5	10.2.204.32/29	10.2.204.33 – 10.2.204.38	10.2.204.39
6	10.2.204.40/29	10.2.204.41 – 10.2.204.46	10.2.204.47
7	10.2.204.48/29	10.2.204.49 – 10.2.204.54	10.2.204.55
8	10.2.204.56/29	10.2.204.57 – 10.2.204.62	10.2.204.63
9	10.2.204.64/29	10.2.204.65 – 10.2.204.70	10.2.204.71
10	10.2.204.72/29	10.2.204.73 – 10.2.204.78	10.2.204.79
11	10.2.204.80/29	10.2.204.81 – 10.2.204.86	10.2.204.87
12	10.2.204.88/29	10.2.204.89 – 10.2.204.94	10.2.204.95
13	10.2.204.96/29	10.2.204.97 – 10.2.204.102	10.2.204.103
14	10.2.204.104/29	10.2.204.105 – 10.2.204.110	10.2.204.111
15	10.2.204.112/29	10.2.204.113 – 10.2.204.118	10.2.204.119
16	10.2.204.120/29	10.2.204.121 – 10.2.204.126	10.2.204.127
17	10.2.204.128/29	10.2.204.129 – 10.2.204.134	10.2.204.135
18	10.2.204.136/29	10.2.204.137 – 10.2.204.142	10.2.204.143
19	10.2.204.144/29	10.2.204.145 – 10.2.204.150	10.2.204.151
20	10.2.204.152/29	10.2.204.153 – 10.2.204.158	10.2.204.159
21	10.2.204.160/29	10.2.204.161 – 10.2.204.166	10.2.204.167
22	10.2.204.168/29	10.2.204.169 – 10.2.204.174	10.2.204.175
23	10.2.204.176/29	10.2.204.177 – 10.2.204.182	10.2.204.183
24	10.2.204.184/29	10.2.204.185 – 10.2.204.190	10.2.204.191
25	10.2.204.192/29	10.2.204.193 – 10.2.204.198	10.2.204.199
26	10.2.204.200/29	10.2.204.201 – 10.2.204.206	10.2.204.207
27	10.2.204.208/29	10.2.204.209 – 10.2.204.214	10.2.204.215
28	10.2.204.216/29	10.2.204.217 – 10.2.204.222	10.2.204.223
29	10.2.204.224/29	10.2.204.225 – 10.2.204.230	10.2.204.231
30	10.2.204.232/29	10.2.204.233 – 10.2.204.238	10.2.204.239
31	10.2.204.240/29	10.2.204.241 – 10.2.204.246	10.2.204.247
32	10.2.204.248/29	10.2.204.249 – 10.2.204.254	10.2.204.255
33	10.2.205.0/29	10.2.205.1 – 10.2.205.6	10.2.205.7
34	10.2.205.8/29	10.2.205.9 – 10.2.205.14	10.2.205.15
35	10.2.205.16/29	10.2.205.17 – 10.2.205.22	10.2.205.23
36	10.2.205.24/29	10.2.205.25 – 10.2.205.30	10.2.205.31
37	10.2.205.32/29	10.2.205.33 – 10.2.205.38	10.2.205.39
38	10.2.205.40/29	10.2.205.41 – 10.2.205.46	10.2.205.47
39	10.2.205.48/29	10.2.205.49 – 10.2.205.54	10.2.205.55
40	10.2.205.56/29	10.2.205.57 – 10.2.205.62	10.2.205.63
41	10.2.205.64/29	10.2.205.65 – 10.2.205.70	10.2.205.71
42	10.2.205.72/29	10.2.205.73 – 10.2.205.78	10.2.205.79
43	10.2.205.80/29	10.2.205.81 – 10.2.205.86	10.2.205.87
44	10.2.205.88/29	10.2.205.89 – 10.2.205.94	10.2.205.95
45	10.2.205.96/29	10.2.205.97 – 10.2.205.102	10.2.205.103
46	10.2.205.104/29	10.2.205.105 – 10.2.205.110	10.2.205.111
47	10.2.205.112/29	10.2.205.113 – 10.2.205.118	10.2.205.119
48	10.2.205.120/29	10.2.205.121 – 10.2.205.126	10.2.205.127
49	10.2.205.128/29	10.2.205.129 – 10.2.205.134	10.2.205.135
50	10.2.205.136/29	10.2.205.137 – 10.2.205.142	10.2.205.143
51	10.2.205.144/29	10.2.205.145 – 10.2.205.150	10.2.205.151
52	10.2.205.152/29	10.2.205.153 – 10.2.205.158	10.2.205.159
53	10.2.205.160/29	10.2.205.161 – 10.2.205.166	10.2.205.167
54	10.2.205.168/29	10.2.205.169 – 10.2.205.174	10.2.205.175
55	10.2.205.176/29	10.2.205.177 – 10.2.205.182	10.2.205.183
56	10.2.205.184/29	10.2.205.185 – 10.2.205.190	10.2.205.191
57	10.2.205.192/29	10.2.205.193 – 10.2.205.198	10.2.205.199
58	10.2.205.200/29	10.2.205.201 – 10.2.205.206	10.2.205.207
59	10.2.205.208/29	10.2.205.209 – 10.2.205.214	10.2.205.215
60	10.2.205.216/29	10.2.205.217 – 10.2.205.222	10.2.205.223
61	10.2.205.224/29	10.2.205.225 – 10.2.205.230	10.2.205.231
62	10.2.205.232/29	10.2.205.233 – 10.2.205.238	10.2.205.239
63	10.2.205.240/29	10.2.205.241 – 10.2.205.246	10.2.205.247
64	10.2.205.248/29	10.2.205.249 – 10.2.205.254	10.2.205.255
65	10.2.206.0/29	10.2.206.1 – 10.2.206.6	10.2.206.7
66	10.2.206.8/29	10.2.206.9 – 10.2.206.14	10.2.206.15
67	10.2.206.16/29	10.2.206.17 – 10.2.206.22	10.2.206.23
68	10.2.206.24/29	10.2.206.25 – 10.2.206.30	10.2.206.31
69	10.2.206.32/29	10.2.206.33 – 10.2.206.38	10.2.206.39
70	10.2.206.40/29	10.2.206.41 – 10.2.206.46	10.2.206.47
71	10.2.206.48/29	10.2.206.49 – 10.2.206.54	10.2.206.55
72	10.2.206.56/29	10.2.206.57 – 10.2.206.62	10.2.206.63
73	10.2.206.64/29	10.2.206.65 – 10.2.206.70	10.2.206.71
74	10.2.206.72/29	10.2.206.73 – 10.2.206.78	10.2.206.79
75	10.2.206.80/29	10.2.206.81 – 10.2.206.86	10.2.206.87
76	10.2.206.88/29	10.2.206.89 – 10.2.206.94	10.2.206.95
77	10.2.206.96/29	10.2.206.97 – 10.2.206.102	10.2.206.103
78	10.2.206.104/29	10.2.206.105 – 10.2.206.110	10.2.206.111
79	10.2.206.112/29	10.2.206.113 – 10.2.206.118	10.2.206.119
80	10.2.206.120/29	10.2.206.121 – 10.2.206.126	10.2.206.127
81	10.2.206.128/29	10.2.206.129 – 10.2.206.134	10.2.206.135
82	10.2.206.136/29	10.2.206.137 – 10.2.206.142	10.2.206.143
83	10.2.206.144/29	10.2.206.145 – 10.2.206.150	10.2.206.151
84	10.2.206.152/29	10.2.206.153 – 10.2.206.158	10.2.206.159
85	10.2.206.160/29	10.2.206.161 – 10.2.206.166	10.2.206.167
86	10.2.206.168/29	10.2.206.169 – 10.2.206.174	10.2.206.175
87	10.2.206.176/29	10.2.206.177 – 10.2.206.182	10.2.206.183
88	10.2.206.184/29	10.2.206.185 – 10.2.206.190	10.2.206.191
89	10.2.206.192/29	10.2.206.193 – 10.2.206.198	10.2.206.199
90	10.2.206.200/29	10.2.206.201 – 10.2.206.206	10.2.206.207
91	10.2.206.208/29	10.2.206.209 – 10.2.206.214	10.2.206.215
92	10.2.206.216/29	10.2.206.217 – 10.2.206.222	10.2.206.223
93	10.2.206.224/29	10.2.206.225 – 10.2.206.230	10.2.206.231
94	10.2.206.232/29	10.2.206.233 – 10.2.206.238	10.2.206.239
95	10.2.206.240/29	10.2.206.241 – 10.2.206.246	10.2.206.247
96	10.2.206.248/29	10.2.206.249 – 10.2.206.254	10.2.206.255
97	10.2.207.0/29	10.2.207.1 – 10.2.207.6	10.2.207.7
98	10.2.207.8/29	10.2.207.9 – 10.2.207.14	10.2.207.15
99	10.2.207.16/29	10.2.207.17 – 10.2.207.22	10.2.207.23
100	10.2.207.24/29	10.2.207.25 – 10.2.207.30	10.2.207.31
101	10.2.207.32/29	10.2.207.33 – 10.2.207.38	10.2.207.39
102	10.2.207.40/29	10.2.207.41 – 10.2.207.46	10.2.207.47
103	10.2.207.48/29	10.2.207.49 – 10.2.207.54	10.2.207.55
104	10.2.207.56/29	10.2.207.57 – 10.2.207.62	10.2.207.63
105	10.2.207.64/29	10.2.207.65 – 10.2.207.70	10.2.207.71
106	10.2.207.72/29	10.2.207.73 – 10.2.207.78	10.2.207.79
107	10.2.207.80/29	10.2.207.81 – 10.2.207.86	10.2.207.87
108	10.2.207.88/29	10.2.207.89 – 10.2.207.94	10.2.207.95
109	10.2.207.96/29	10.2.207.97 – 10.2.207.102	10.2.207.103
110	10.2.207.104/29	10.2.207.105 – 10.2.207.110	10.2.207.111
111	10.2.207.112/29	10.2.207.113 – 10.2.207.118	10.2.207.119
112	10.2.207.120/29	10.2.207.121 – 10.2.207.126	10.2.207.127
113	10.2.207.128/29	10.2.207.129 – 10.2.207.134	10.2.207.135
114	10.2.207.136/29	10.2.207.137 – 10.2.207.142	10.2.207.143
115	10.2.207.144/29	10.2.207.145 – 10.2.207.150	10.2.207.151
116	10.2.207.152/29	10.2.207.153 – 10.2.207.158	10.2.207.159
117	10.2.207.160/29	10.2.207.161 – 10.2.207.166	10.2.207.167
118	10.2.207.168/29	10.2.207.169 – 10.2.207.174	10.2.207.175
119	10.2.207.176/29	10.2.207.177 – 10.2.207.182	10.2.207.183
120	10.2.207.184/29	10.2.207.185 – 10.2.207.190	10.2.207.191
121	10.2.207.192/29	10.2.207.193 – 10.2.207.198	10.2.207.199
122	10.2.207.200/29	10.2.207.201 – 10.2.207.206	10.2.207.207
123	10.2.207.208/29	10.2.207.209 – 10.2.207.214	10.2.207.215
124	10.2.207.216/29	10.2.207.217 – 10.2.207.222	10.2.207.223
125	10.2.207.224/29	10.2.207.225 – 10.2.207.230	10.2.207.231
126	10.2.207.232/29	10.2.207.233 – 10.2.207.238	10.2.207.239
127	10.2.207.240/29	10.2.207.241 – 10.2.207.246	10.2.207.247
128	10.2.207.248/29	10.2.207.249 – 10.2.207.254	10.2.207.255

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 →