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)10.2.64.0/22

network10.2.64.0/22

broadcast10.2.67.255

first host10.2.64.1

last host10.2.67.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.64.0/22

address00001010.00000010.01000000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.01000000.00000000

broadcast00001010.00000010.01000011.11111111

green = network part, grey = host part

hex0x0a024000

decimal167919616

reverse dns0.64.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:4000

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.64.0/29	10.2.64.1 – 10.2.64.6	10.2.64.7
2	10.2.64.8/29	10.2.64.9 – 10.2.64.14	10.2.64.15
3	10.2.64.16/29	10.2.64.17 – 10.2.64.22	10.2.64.23
4	10.2.64.24/29	10.2.64.25 – 10.2.64.30	10.2.64.31
5	10.2.64.32/29	10.2.64.33 – 10.2.64.38	10.2.64.39
6	10.2.64.40/29	10.2.64.41 – 10.2.64.46	10.2.64.47
7	10.2.64.48/29	10.2.64.49 – 10.2.64.54	10.2.64.55
8	10.2.64.56/29	10.2.64.57 – 10.2.64.62	10.2.64.63
9	10.2.64.64/29	10.2.64.65 – 10.2.64.70	10.2.64.71
10	10.2.64.72/29	10.2.64.73 – 10.2.64.78	10.2.64.79
11	10.2.64.80/29	10.2.64.81 – 10.2.64.86	10.2.64.87
12	10.2.64.88/29	10.2.64.89 – 10.2.64.94	10.2.64.95
13	10.2.64.96/29	10.2.64.97 – 10.2.64.102	10.2.64.103
14	10.2.64.104/29	10.2.64.105 – 10.2.64.110	10.2.64.111
15	10.2.64.112/29	10.2.64.113 – 10.2.64.118	10.2.64.119
16	10.2.64.120/29	10.2.64.121 – 10.2.64.126	10.2.64.127
17	10.2.64.128/29	10.2.64.129 – 10.2.64.134	10.2.64.135
18	10.2.64.136/29	10.2.64.137 – 10.2.64.142	10.2.64.143
19	10.2.64.144/29	10.2.64.145 – 10.2.64.150	10.2.64.151
20	10.2.64.152/29	10.2.64.153 – 10.2.64.158	10.2.64.159
21	10.2.64.160/29	10.2.64.161 – 10.2.64.166	10.2.64.167
22	10.2.64.168/29	10.2.64.169 – 10.2.64.174	10.2.64.175
23	10.2.64.176/29	10.2.64.177 – 10.2.64.182	10.2.64.183
24	10.2.64.184/29	10.2.64.185 – 10.2.64.190	10.2.64.191
25	10.2.64.192/29	10.2.64.193 – 10.2.64.198	10.2.64.199
26	10.2.64.200/29	10.2.64.201 – 10.2.64.206	10.2.64.207
27	10.2.64.208/29	10.2.64.209 – 10.2.64.214	10.2.64.215
28	10.2.64.216/29	10.2.64.217 – 10.2.64.222	10.2.64.223
29	10.2.64.224/29	10.2.64.225 – 10.2.64.230	10.2.64.231
30	10.2.64.232/29	10.2.64.233 – 10.2.64.238	10.2.64.239
31	10.2.64.240/29	10.2.64.241 – 10.2.64.246	10.2.64.247
32	10.2.64.248/29	10.2.64.249 – 10.2.64.254	10.2.64.255
33	10.2.65.0/29	10.2.65.1 – 10.2.65.6	10.2.65.7
34	10.2.65.8/29	10.2.65.9 – 10.2.65.14	10.2.65.15
35	10.2.65.16/29	10.2.65.17 – 10.2.65.22	10.2.65.23
36	10.2.65.24/29	10.2.65.25 – 10.2.65.30	10.2.65.31
37	10.2.65.32/29	10.2.65.33 – 10.2.65.38	10.2.65.39
38	10.2.65.40/29	10.2.65.41 – 10.2.65.46	10.2.65.47
39	10.2.65.48/29	10.2.65.49 – 10.2.65.54	10.2.65.55
40	10.2.65.56/29	10.2.65.57 – 10.2.65.62	10.2.65.63
41	10.2.65.64/29	10.2.65.65 – 10.2.65.70	10.2.65.71
42	10.2.65.72/29	10.2.65.73 – 10.2.65.78	10.2.65.79
43	10.2.65.80/29	10.2.65.81 – 10.2.65.86	10.2.65.87
44	10.2.65.88/29	10.2.65.89 – 10.2.65.94	10.2.65.95
45	10.2.65.96/29	10.2.65.97 – 10.2.65.102	10.2.65.103
46	10.2.65.104/29	10.2.65.105 – 10.2.65.110	10.2.65.111
47	10.2.65.112/29	10.2.65.113 – 10.2.65.118	10.2.65.119
48	10.2.65.120/29	10.2.65.121 – 10.2.65.126	10.2.65.127
49	10.2.65.128/29	10.2.65.129 – 10.2.65.134	10.2.65.135
50	10.2.65.136/29	10.2.65.137 – 10.2.65.142	10.2.65.143
51	10.2.65.144/29	10.2.65.145 – 10.2.65.150	10.2.65.151
52	10.2.65.152/29	10.2.65.153 – 10.2.65.158	10.2.65.159
53	10.2.65.160/29	10.2.65.161 – 10.2.65.166	10.2.65.167
54	10.2.65.168/29	10.2.65.169 – 10.2.65.174	10.2.65.175
55	10.2.65.176/29	10.2.65.177 – 10.2.65.182	10.2.65.183
56	10.2.65.184/29	10.2.65.185 – 10.2.65.190	10.2.65.191
57	10.2.65.192/29	10.2.65.193 – 10.2.65.198	10.2.65.199
58	10.2.65.200/29	10.2.65.201 – 10.2.65.206	10.2.65.207
59	10.2.65.208/29	10.2.65.209 – 10.2.65.214	10.2.65.215
60	10.2.65.216/29	10.2.65.217 – 10.2.65.222	10.2.65.223
61	10.2.65.224/29	10.2.65.225 – 10.2.65.230	10.2.65.231
62	10.2.65.232/29	10.2.65.233 – 10.2.65.238	10.2.65.239
63	10.2.65.240/29	10.2.65.241 – 10.2.65.246	10.2.65.247
64	10.2.65.248/29	10.2.65.249 – 10.2.65.254	10.2.65.255
65	10.2.66.0/29	10.2.66.1 – 10.2.66.6	10.2.66.7
66	10.2.66.8/29	10.2.66.9 – 10.2.66.14	10.2.66.15
67	10.2.66.16/29	10.2.66.17 – 10.2.66.22	10.2.66.23
68	10.2.66.24/29	10.2.66.25 – 10.2.66.30	10.2.66.31
69	10.2.66.32/29	10.2.66.33 – 10.2.66.38	10.2.66.39
70	10.2.66.40/29	10.2.66.41 – 10.2.66.46	10.2.66.47
71	10.2.66.48/29	10.2.66.49 – 10.2.66.54	10.2.66.55
72	10.2.66.56/29	10.2.66.57 – 10.2.66.62	10.2.66.63
73	10.2.66.64/29	10.2.66.65 – 10.2.66.70	10.2.66.71
74	10.2.66.72/29	10.2.66.73 – 10.2.66.78	10.2.66.79
75	10.2.66.80/29	10.2.66.81 – 10.2.66.86	10.2.66.87
76	10.2.66.88/29	10.2.66.89 – 10.2.66.94	10.2.66.95
77	10.2.66.96/29	10.2.66.97 – 10.2.66.102	10.2.66.103
78	10.2.66.104/29	10.2.66.105 – 10.2.66.110	10.2.66.111
79	10.2.66.112/29	10.2.66.113 – 10.2.66.118	10.2.66.119
80	10.2.66.120/29	10.2.66.121 – 10.2.66.126	10.2.66.127
81	10.2.66.128/29	10.2.66.129 – 10.2.66.134	10.2.66.135
82	10.2.66.136/29	10.2.66.137 – 10.2.66.142	10.2.66.143
83	10.2.66.144/29	10.2.66.145 – 10.2.66.150	10.2.66.151
84	10.2.66.152/29	10.2.66.153 – 10.2.66.158	10.2.66.159
85	10.2.66.160/29	10.2.66.161 – 10.2.66.166	10.2.66.167
86	10.2.66.168/29	10.2.66.169 – 10.2.66.174	10.2.66.175
87	10.2.66.176/29	10.2.66.177 – 10.2.66.182	10.2.66.183
88	10.2.66.184/29	10.2.66.185 – 10.2.66.190	10.2.66.191
89	10.2.66.192/29	10.2.66.193 – 10.2.66.198	10.2.66.199
90	10.2.66.200/29	10.2.66.201 – 10.2.66.206	10.2.66.207
91	10.2.66.208/29	10.2.66.209 – 10.2.66.214	10.2.66.215
92	10.2.66.216/29	10.2.66.217 – 10.2.66.222	10.2.66.223
93	10.2.66.224/29	10.2.66.225 – 10.2.66.230	10.2.66.231
94	10.2.66.232/29	10.2.66.233 – 10.2.66.238	10.2.66.239
95	10.2.66.240/29	10.2.66.241 – 10.2.66.246	10.2.66.247
96	10.2.66.248/29	10.2.66.249 – 10.2.66.254	10.2.66.255
97	10.2.67.0/29	10.2.67.1 – 10.2.67.6	10.2.67.7
98	10.2.67.8/29	10.2.67.9 – 10.2.67.14	10.2.67.15
99	10.2.67.16/29	10.2.67.17 – 10.2.67.22	10.2.67.23
100	10.2.67.24/29	10.2.67.25 – 10.2.67.30	10.2.67.31
101	10.2.67.32/29	10.2.67.33 – 10.2.67.38	10.2.67.39
102	10.2.67.40/29	10.2.67.41 – 10.2.67.46	10.2.67.47
103	10.2.67.48/29	10.2.67.49 – 10.2.67.54	10.2.67.55
104	10.2.67.56/29	10.2.67.57 – 10.2.67.62	10.2.67.63
105	10.2.67.64/29	10.2.67.65 – 10.2.67.70	10.2.67.71
106	10.2.67.72/29	10.2.67.73 – 10.2.67.78	10.2.67.79
107	10.2.67.80/29	10.2.67.81 – 10.2.67.86	10.2.67.87
108	10.2.67.88/29	10.2.67.89 – 10.2.67.94	10.2.67.95
109	10.2.67.96/29	10.2.67.97 – 10.2.67.102	10.2.67.103
110	10.2.67.104/29	10.2.67.105 – 10.2.67.110	10.2.67.111
111	10.2.67.112/29	10.2.67.113 – 10.2.67.118	10.2.67.119
112	10.2.67.120/29	10.2.67.121 – 10.2.67.126	10.2.67.127
113	10.2.67.128/29	10.2.67.129 – 10.2.67.134	10.2.67.135
114	10.2.67.136/29	10.2.67.137 – 10.2.67.142	10.2.67.143
115	10.2.67.144/29	10.2.67.145 – 10.2.67.150	10.2.67.151
116	10.2.67.152/29	10.2.67.153 – 10.2.67.158	10.2.67.159
117	10.2.67.160/29	10.2.67.161 – 10.2.67.166	10.2.67.167
118	10.2.67.168/29	10.2.67.169 – 10.2.67.174	10.2.67.175
119	10.2.67.176/29	10.2.67.177 – 10.2.67.182	10.2.67.183
120	10.2.67.184/29	10.2.67.185 – 10.2.67.190	10.2.67.191
121	10.2.67.192/29	10.2.67.193 – 10.2.67.198	10.2.67.199
122	10.2.67.200/29	10.2.67.201 – 10.2.67.206	10.2.67.207
123	10.2.67.208/29	10.2.67.209 – 10.2.67.214	10.2.67.215
124	10.2.67.216/29	10.2.67.217 – 10.2.67.222	10.2.67.223
125	10.2.67.224/29	10.2.67.225 – 10.2.67.230	10.2.67.231
126	10.2.67.232/29	10.2.67.233 – 10.2.67.238	10.2.67.239
127	10.2.67.240/29	10.2.67.241 – 10.2.67.246	10.2.67.247
128	10.2.67.248/29	10.2.67.249 – 10.2.67.254	10.2.67.255

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 →