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)10.2.252.0/22

network10.2.252.0/22

broadcast10.2.255.255

first host10.2.252.1

last host10.2.255.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.252.0/22

address00001010.00000010.11111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.11111100.00000000

broadcast00001010.00000010.11111111.11111111

green = network part, grey = host part

hex0x0a02fc00

decimal167967744

reverse dns0.252.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:fc00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.252.0/29	10.2.252.1 – 10.2.252.6	10.2.252.7
2	10.2.252.8/29	10.2.252.9 – 10.2.252.14	10.2.252.15
3	10.2.252.16/29	10.2.252.17 – 10.2.252.22	10.2.252.23
4	10.2.252.24/29	10.2.252.25 – 10.2.252.30	10.2.252.31
5	10.2.252.32/29	10.2.252.33 – 10.2.252.38	10.2.252.39
6	10.2.252.40/29	10.2.252.41 – 10.2.252.46	10.2.252.47
7	10.2.252.48/29	10.2.252.49 – 10.2.252.54	10.2.252.55
8	10.2.252.56/29	10.2.252.57 – 10.2.252.62	10.2.252.63
9	10.2.252.64/29	10.2.252.65 – 10.2.252.70	10.2.252.71
10	10.2.252.72/29	10.2.252.73 – 10.2.252.78	10.2.252.79
11	10.2.252.80/29	10.2.252.81 – 10.2.252.86	10.2.252.87
12	10.2.252.88/29	10.2.252.89 – 10.2.252.94	10.2.252.95
13	10.2.252.96/29	10.2.252.97 – 10.2.252.102	10.2.252.103
14	10.2.252.104/29	10.2.252.105 – 10.2.252.110	10.2.252.111
15	10.2.252.112/29	10.2.252.113 – 10.2.252.118	10.2.252.119
16	10.2.252.120/29	10.2.252.121 – 10.2.252.126	10.2.252.127
17	10.2.252.128/29	10.2.252.129 – 10.2.252.134	10.2.252.135
18	10.2.252.136/29	10.2.252.137 – 10.2.252.142	10.2.252.143
19	10.2.252.144/29	10.2.252.145 – 10.2.252.150	10.2.252.151
20	10.2.252.152/29	10.2.252.153 – 10.2.252.158	10.2.252.159
21	10.2.252.160/29	10.2.252.161 – 10.2.252.166	10.2.252.167
22	10.2.252.168/29	10.2.252.169 – 10.2.252.174	10.2.252.175
23	10.2.252.176/29	10.2.252.177 – 10.2.252.182	10.2.252.183
24	10.2.252.184/29	10.2.252.185 – 10.2.252.190	10.2.252.191
25	10.2.252.192/29	10.2.252.193 – 10.2.252.198	10.2.252.199
26	10.2.252.200/29	10.2.252.201 – 10.2.252.206	10.2.252.207
27	10.2.252.208/29	10.2.252.209 – 10.2.252.214	10.2.252.215
28	10.2.252.216/29	10.2.252.217 – 10.2.252.222	10.2.252.223
29	10.2.252.224/29	10.2.252.225 – 10.2.252.230	10.2.252.231
30	10.2.252.232/29	10.2.252.233 – 10.2.252.238	10.2.252.239
31	10.2.252.240/29	10.2.252.241 – 10.2.252.246	10.2.252.247
32	10.2.252.248/29	10.2.252.249 – 10.2.252.254	10.2.252.255
33	10.2.253.0/29	10.2.253.1 – 10.2.253.6	10.2.253.7
34	10.2.253.8/29	10.2.253.9 – 10.2.253.14	10.2.253.15
35	10.2.253.16/29	10.2.253.17 – 10.2.253.22	10.2.253.23
36	10.2.253.24/29	10.2.253.25 – 10.2.253.30	10.2.253.31
37	10.2.253.32/29	10.2.253.33 – 10.2.253.38	10.2.253.39
38	10.2.253.40/29	10.2.253.41 – 10.2.253.46	10.2.253.47
39	10.2.253.48/29	10.2.253.49 – 10.2.253.54	10.2.253.55
40	10.2.253.56/29	10.2.253.57 – 10.2.253.62	10.2.253.63
41	10.2.253.64/29	10.2.253.65 – 10.2.253.70	10.2.253.71
42	10.2.253.72/29	10.2.253.73 – 10.2.253.78	10.2.253.79
43	10.2.253.80/29	10.2.253.81 – 10.2.253.86	10.2.253.87
44	10.2.253.88/29	10.2.253.89 – 10.2.253.94	10.2.253.95
45	10.2.253.96/29	10.2.253.97 – 10.2.253.102	10.2.253.103
46	10.2.253.104/29	10.2.253.105 – 10.2.253.110	10.2.253.111
47	10.2.253.112/29	10.2.253.113 – 10.2.253.118	10.2.253.119
48	10.2.253.120/29	10.2.253.121 – 10.2.253.126	10.2.253.127
49	10.2.253.128/29	10.2.253.129 – 10.2.253.134	10.2.253.135
50	10.2.253.136/29	10.2.253.137 – 10.2.253.142	10.2.253.143
51	10.2.253.144/29	10.2.253.145 – 10.2.253.150	10.2.253.151
52	10.2.253.152/29	10.2.253.153 – 10.2.253.158	10.2.253.159
53	10.2.253.160/29	10.2.253.161 – 10.2.253.166	10.2.253.167
54	10.2.253.168/29	10.2.253.169 – 10.2.253.174	10.2.253.175
55	10.2.253.176/29	10.2.253.177 – 10.2.253.182	10.2.253.183
56	10.2.253.184/29	10.2.253.185 – 10.2.253.190	10.2.253.191
57	10.2.253.192/29	10.2.253.193 – 10.2.253.198	10.2.253.199
58	10.2.253.200/29	10.2.253.201 – 10.2.253.206	10.2.253.207
59	10.2.253.208/29	10.2.253.209 – 10.2.253.214	10.2.253.215
60	10.2.253.216/29	10.2.253.217 – 10.2.253.222	10.2.253.223
61	10.2.253.224/29	10.2.253.225 – 10.2.253.230	10.2.253.231
62	10.2.253.232/29	10.2.253.233 – 10.2.253.238	10.2.253.239
63	10.2.253.240/29	10.2.253.241 – 10.2.253.246	10.2.253.247
64	10.2.253.248/29	10.2.253.249 – 10.2.253.254	10.2.253.255
65	10.2.254.0/29	10.2.254.1 – 10.2.254.6	10.2.254.7
66	10.2.254.8/29	10.2.254.9 – 10.2.254.14	10.2.254.15
67	10.2.254.16/29	10.2.254.17 – 10.2.254.22	10.2.254.23
68	10.2.254.24/29	10.2.254.25 – 10.2.254.30	10.2.254.31
69	10.2.254.32/29	10.2.254.33 – 10.2.254.38	10.2.254.39
70	10.2.254.40/29	10.2.254.41 – 10.2.254.46	10.2.254.47
71	10.2.254.48/29	10.2.254.49 – 10.2.254.54	10.2.254.55
72	10.2.254.56/29	10.2.254.57 – 10.2.254.62	10.2.254.63
73	10.2.254.64/29	10.2.254.65 – 10.2.254.70	10.2.254.71
74	10.2.254.72/29	10.2.254.73 – 10.2.254.78	10.2.254.79
75	10.2.254.80/29	10.2.254.81 – 10.2.254.86	10.2.254.87
76	10.2.254.88/29	10.2.254.89 – 10.2.254.94	10.2.254.95
77	10.2.254.96/29	10.2.254.97 – 10.2.254.102	10.2.254.103
78	10.2.254.104/29	10.2.254.105 – 10.2.254.110	10.2.254.111
79	10.2.254.112/29	10.2.254.113 – 10.2.254.118	10.2.254.119
80	10.2.254.120/29	10.2.254.121 – 10.2.254.126	10.2.254.127
81	10.2.254.128/29	10.2.254.129 – 10.2.254.134	10.2.254.135
82	10.2.254.136/29	10.2.254.137 – 10.2.254.142	10.2.254.143
83	10.2.254.144/29	10.2.254.145 – 10.2.254.150	10.2.254.151
84	10.2.254.152/29	10.2.254.153 – 10.2.254.158	10.2.254.159
85	10.2.254.160/29	10.2.254.161 – 10.2.254.166	10.2.254.167
86	10.2.254.168/29	10.2.254.169 – 10.2.254.174	10.2.254.175
87	10.2.254.176/29	10.2.254.177 – 10.2.254.182	10.2.254.183
88	10.2.254.184/29	10.2.254.185 – 10.2.254.190	10.2.254.191
89	10.2.254.192/29	10.2.254.193 – 10.2.254.198	10.2.254.199
90	10.2.254.200/29	10.2.254.201 – 10.2.254.206	10.2.254.207
91	10.2.254.208/29	10.2.254.209 – 10.2.254.214	10.2.254.215
92	10.2.254.216/29	10.2.254.217 – 10.2.254.222	10.2.254.223
93	10.2.254.224/29	10.2.254.225 – 10.2.254.230	10.2.254.231
94	10.2.254.232/29	10.2.254.233 – 10.2.254.238	10.2.254.239
95	10.2.254.240/29	10.2.254.241 – 10.2.254.246	10.2.254.247
96	10.2.254.248/29	10.2.254.249 – 10.2.254.254	10.2.254.255
97	10.2.255.0/29	10.2.255.1 – 10.2.255.6	10.2.255.7
98	10.2.255.8/29	10.2.255.9 – 10.2.255.14	10.2.255.15
99	10.2.255.16/29	10.2.255.17 – 10.2.255.22	10.2.255.23
100	10.2.255.24/29	10.2.255.25 – 10.2.255.30	10.2.255.31
101	10.2.255.32/29	10.2.255.33 – 10.2.255.38	10.2.255.39
102	10.2.255.40/29	10.2.255.41 – 10.2.255.46	10.2.255.47
103	10.2.255.48/29	10.2.255.49 – 10.2.255.54	10.2.255.55
104	10.2.255.56/29	10.2.255.57 – 10.2.255.62	10.2.255.63
105	10.2.255.64/29	10.2.255.65 – 10.2.255.70	10.2.255.71
106	10.2.255.72/29	10.2.255.73 – 10.2.255.78	10.2.255.79
107	10.2.255.80/29	10.2.255.81 – 10.2.255.86	10.2.255.87
108	10.2.255.88/29	10.2.255.89 – 10.2.255.94	10.2.255.95
109	10.2.255.96/29	10.2.255.97 – 10.2.255.102	10.2.255.103
110	10.2.255.104/29	10.2.255.105 – 10.2.255.110	10.2.255.111
111	10.2.255.112/29	10.2.255.113 – 10.2.255.118	10.2.255.119
112	10.2.255.120/29	10.2.255.121 – 10.2.255.126	10.2.255.127
113	10.2.255.128/29	10.2.255.129 – 10.2.255.134	10.2.255.135
114	10.2.255.136/29	10.2.255.137 – 10.2.255.142	10.2.255.143
115	10.2.255.144/29	10.2.255.145 – 10.2.255.150	10.2.255.151
116	10.2.255.152/29	10.2.255.153 – 10.2.255.158	10.2.255.159
117	10.2.255.160/29	10.2.255.161 – 10.2.255.166	10.2.255.167
118	10.2.255.168/29	10.2.255.169 – 10.2.255.174	10.2.255.175
119	10.2.255.176/29	10.2.255.177 – 10.2.255.182	10.2.255.183
120	10.2.255.184/29	10.2.255.185 – 10.2.255.190	10.2.255.191
121	10.2.255.192/29	10.2.255.193 – 10.2.255.198	10.2.255.199
122	10.2.255.200/29	10.2.255.201 – 10.2.255.206	10.2.255.207
123	10.2.255.208/29	10.2.255.209 – 10.2.255.214	10.2.255.215
124	10.2.255.216/29	10.2.255.217 – 10.2.255.222	10.2.255.223
125	10.2.255.224/29	10.2.255.225 – 10.2.255.230	10.2.255.231
126	10.2.255.232/29	10.2.255.233 – 10.2.255.238	10.2.255.239
127	10.2.255.240/29	10.2.255.241 – 10.2.255.246	10.2.255.247
128	10.2.255.248/29	10.2.255.249 – 10.2.255.254	10.2.255.255

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 →