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)10.2.148.0/22

network10.2.148.0/22

broadcast10.2.151.255

first host10.2.148.1

last host10.2.151.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.148.0/22

address00001010.00000010.10010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10010100.00000000

broadcast00001010.00000010.10010111.11111111

green = network part, grey = host part

hex0x0a029400

decimal167941120

reverse dns0.148.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.148.0/29	10.2.148.1 – 10.2.148.6	10.2.148.7
2	10.2.148.8/29	10.2.148.9 – 10.2.148.14	10.2.148.15
3	10.2.148.16/29	10.2.148.17 – 10.2.148.22	10.2.148.23
4	10.2.148.24/29	10.2.148.25 – 10.2.148.30	10.2.148.31
5	10.2.148.32/29	10.2.148.33 – 10.2.148.38	10.2.148.39
6	10.2.148.40/29	10.2.148.41 – 10.2.148.46	10.2.148.47
7	10.2.148.48/29	10.2.148.49 – 10.2.148.54	10.2.148.55
8	10.2.148.56/29	10.2.148.57 – 10.2.148.62	10.2.148.63
9	10.2.148.64/29	10.2.148.65 – 10.2.148.70	10.2.148.71
10	10.2.148.72/29	10.2.148.73 – 10.2.148.78	10.2.148.79
11	10.2.148.80/29	10.2.148.81 – 10.2.148.86	10.2.148.87
12	10.2.148.88/29	10.2.148.89 – 10.2.148.94	10.2.148.95
13	10.2.148.96/29	10.2.148.97 – 10.2.148.102	10.2.148.103
14	10.2.148.104/29	10.2.148.105 – 10.2.148.110	10.2.148.111
15	10.2.148.112/29	10.2.148.113 – 10.2.148.118	10.2.148.119
16	10.2.148.120/29	10.2.148.121 – 10.2.148.126	10.2.148.127
17	10.2.148.128/29	10.2.148.129 – 10.2.148.134	10.2.148.135
18	10.2.148.136/29	10.2.148.137 – 10.2.148.142	10.2.148.143
19	10.2.148.144/29	10.2.148.145 – 10.2.148.150	10.2.148.151
20	10.2.148.152/29	10.2.148.153 – 10.2.148.158	10.2.148.159
21	10.2.148.160/29	10.2.148.161 – 10.2.148.166	10.2.148.167
22	10.2.148.168/29	10.2.148.169 – 10.2.148.174	10.2.148.175
23	10.2.148.176/29	10.2.148.177 – 10.2.148.182	10.2.148.183
24	10.2.148.184/29	10.2.148.185 – 10.2.148.190	10.2.148.191
25	10.2.148.192/29	10.2.148.193 – 10.2.148.198	10.2.148.199
26	10.2.148.200/29	10.2.148.201 – 10.2.148.206	10.2.148.207
27	10.2.148.208/29	10.2.148.209 – 10.2.148.214	10.2.148.215
28	10.2.148.216/29	10.2.148.217 – 10.2.148.222	10.2.148.223
29	10.2.148.224/29	10.2.148.225 – 10.2.148.230	10.2.148.231
30	10.2.148.232/29	10.2.148.233 – 10.2.148.238	10.2.148.239
31	10.2.148.240/29	10.2.148.241 – 10.2.148.246	10.2.148.247
32	10.2.148.248/29	10.2.148.249 – 10.2.148.254	10.2.148.255
33	10.2.149.0/29	10.2.149.1 – 10.2.149.6	10.2.149.7
34	10.2.149.8/29	10.2.149.9 – 10.2.149.14	10.2.149.15
35	10.2.149.16/29	10.2.149.17 – 10.2.149.22	10.2.149.23
36	10.2.149.24/29	10.2.149.25 – 10.2.149.30	10.2.149.31
37	10.2.149.32/29	10.2.149.33 – 10.2.149.38	10.2.149.39
38	10.2.149.40/29	10.2.149.41 – 10.2.149.46	10.2.149.47
39	10.2.149.48/29	10.2.149.49 – 10.2.149.54	10.2.149.55
40	10.2.149.56/29	10.2.149.57 – 10.2.149.62	10.2.149.63
41	10.2.149.64/29	10.2.149.65 – 10.2.149.70	10.2.149.71
42	10.2.149.72/29	10.2.149.73 – 10.2.149.78	10.2.149.79
43	10.2.149.80/29	10.2.149.81 – 10.2.149.86	10.2.149.87
44	10.2.149.88/29	10.2.149.89 – 10.2.149.94	10.2.149.95
45	10.2.149.96/29	10.2.149.97 – 10.2.149.102	10.2.149.103
46	10.2.149.104/29	10.2.149.105 – 10.2.149.110	10.2.149.111
47	10.2.149.112/29	10.2.149.113 – 10.2.149.118	10.2.149.119
48	10.2.149.120/29	10.2.149.121 – 10.2.149.126	10.2.149.127
49	10.2.149.128/29	10.2.149.129 – 10.2.149.134	10.2.149.135
50	10.2.149.136/29	10.2.149.137 – 10.2.149.142	10.2.149.143
51	10.2.149.144/29	10.2.149.145 – 10.2.149.150	10.2.149.151
52	10.2.149.152/29	10.2.149.153 – 10.2.149.158	10.2.149.159
53	10.2.149.160/29	10.2.149.161 – 10.2.149.166	10.2.149.167
54	10.2.149.168/29	10.2.149.169 – 10.2.149.174	10.2.149.175
55	10.2.149.176/29	10.2.149.177 – 10.2.149.182	10.2.149.183
56	10.2.149.184/29	10.2.149.185 – 10.2.149.190	10.2.149.191
57	10.2.149.192/29	10.2.149.193 – 10.2.149.198	10.2.149.199
58	10.2.149.200/29	10.2.149.201 – 10.2.149.206	10.2.149.207
59	10.2.149.208/29	10.2.149.209 – 10.2.149.214	10.2.149.215
60	10.2.149.216/29	10.2.149.217 – 10.2.149.222	10.2.149.223
61	10.2.149.224/29	10.2.149.225 – 10.2.149.230	10.2.149.231
62	10.2.149.232/29	10.2.149.233 – 10.2.149.238	10.2.149.239
63	10.2.149.240/29	10.2.149.241 – 10.2.149.246	10.2.149.247
64	10.2.149.248/29	10.2.149.249 – 10.2.149.254	10.2.149.255
65	10.2.150.0/29	10.2.150.1 – 10.2.150.6	10.2.150.7
66	10.2.150.8/29	10.2.150.9 – 10.2.150.14	10.2.150.15
67	10.2.150.16/29	10.2.150.17 – 10.2.150.22	10.2.150.23
68	10.2.150.24/29	10.2.150.25 – 10.2.150.30	10.2.150.31
69	10.2.150.32/29	10.2.150.33 – 10.2.150.38	10.2.150.39
70	10.2.150.40/29	10.2.150.41 – 10.2.150.46	10.2.150.47
71	10.2.150.48/29	10.2.150.49 – 10.2.150.54	10.2.150.55
72	10.2.150.56/29	10.2.150.57 – 10.2.150.62	10.2.150.63
73	10.2.150.64/29	10.2.150.65 – 10.2.150.70	10.2.150.71
74	10.2.150.72/29	10.2.150.73 – 10.2.150.78	10.2.150.79
75	10.2.150.80/29	10.2.150.81 – 10.2.150.86	10.2.150.87
76	10.2.150.88/29	10.2.150.89 – 10.2.150.94	10.2.150.95
77	10.2.150.96/29	10.2.150.97 – 10.2.150.102	10.2.150.103
78	10.2.150.104/29	10.2.150.105 – 10.2.150.110	10.2.150.111
79	10.2.150.112/29	10.2.150.113 – 10.2.150.118	10.2.150.119
80	10.2.150.120/29	10.2.150.121 – 10.2.150.126	10.2.150.127
81	10.2.150.128/29	10.2.150.129 – 10.2.150.134	10.2.150.135
82	10.2.150.136/29	10.2.150.137 – 10.2.150.142	10.2.150.143
83	10.2.150.144/29	10.2.150.145 – 10.2.150.150	10.2.150.151
84	10.2.150.152/29	10.2.150.153 – 10.2.150.158	10.2.150.159
85	10.2.150.160/29	10.2.150.161 – 10.2.150.166	10.2.150.167
86	10.2.150.168/29	10.2.150.169 – 10.2.150.174	10.2.150.175
87	10.2.150.176/29	10.2.150.177 – 10.2.150.182	10.2.150.183
88	10.2.150.184/29	10.2.150.185 – 10.2.150.190	10.2.150.191
89	10.2.150.192/29	10.2.150.193 – 10.2.150.198	10.2.150.199
90	10.2.150.200/29	10.2.150.201 – 10.2.150.206	10.2.150.207
91	10.2.150.208/29	10.2.150.209 – 10.2.150.214	10.2.150.215
92	10.2.150.216/29	10.2.150.217 – 10.2.150.222	10.2.150.223
93	10.2.150.224/29	10.2.150.225 – 10.2.150.230	10.2.150.231
94	10.2.150.232/29	10.2.150.233 – 10.2.150.238	10.2.150.239
95	10.2.150.240/29	10.2.150.241 – 10.2.150.246	10.2.150.247
96	10.2.150.248/29	10.2.150.249 – 10.2.150.254	10.2.150.255
97	10.2.151.0/29	10.2.151.1 – 10.2.151.6	10.2.151.7
98	10.2.151.8/29	10.2.151.9 – 10.2.151.14	10.2.151.15
99	10.2.151.16/29	10.2.151.17 – 10.2.151.22	10.2.151.23
100	10.2.151.24/29	10.2.151.25 – 10.2.151.30	10.2.151.31
101	10.2.151.32/29	10.2.151.33 – 10.2.151.38	10.2.151.39
102	10.2.151.40/29	10.2.151.41 – 10.2.151.46	10.2.151.47
103	10.2.151.48/29	10.2.151.49 – 10.2.151.54	10.2.151.55
104	10.2.151.56/29	10.2.151.57 – 10.2.151.62	10.2.151.63
105	10.2.151.64/29	10.2.151.65 – 10.2.151.70	10.2.151.71
106	10.2.151.72/29	10.2.151.73 – 10.2.151.78	10.2.151.79
107	10.2.151.80/29	10.2.151.81 – 10.2.151.86	10.2.151.87
108	10.2.151.88/29	10.2.151.89 – 10.2.151.94	10.2.151.95
109	10.2.151.96/29	10.2.151.97 – 10.2.151.102	10.2.151.103
110	10.2.151.104/29	10.2.151.105 – 10.2.151.110	10.2.151.111
111	10.2.151.112/29	10.2.151.113 – 10.2.151.118	10.2.151.119
112	10.2.151.120/29	10.2.151.121 – 10.2.151.126	10.2.151.127
113	10.2.151.128/29	10.2.151.129 – 10.2.151.134	10.2.151.135
114	10.2.151.136/29	10.2.151.137 – 10.2.151.142	10.2.151.143
115	10.2.151.144/29	10.2.151.145 – 10.2.151.150	10.2.151.151
116	10.2.151.152/29	10.2.151.153 – 10.2.151.158	10.2.151.159
117	10.2.151.160/29	10.2.151.161 – 10.2.151.166	10.2.151.167
118	10.2.151.168/29	10.2.151.169 – 10.2.151.174	10.2.151.175
119	10.2.151.176/29	10.2.151.177 – 10.2.151.182	10.2.151.183
120	10.2.151.184/29	10.2.151.185 – 10.2.151.190	10.2.151.191
121	10.2.151.192/29	10.2.151.193 – 10.2.151.198	10.2.151.199
122	10.2.151.200/29	10.2.151.201 – 10.2.151.206	10.2.151.207
123	10.2.151.208/29	10.2.151.209 – 10.2.151.214	10.2.151.215
124	10.2.151.216/29	10.2.151.217 – 10.2.151.222	10.2.151.223
125	10.2.151.224/29	10.2.151.225 – 10.2.151.230	10.2.151.231
126	10.2.151.232/29	10.2.151.233 – 10.2.151.238	10.2.151.239
127	10.2.151.240/29	10.2.151.241 – 10.2.151.246	10.2.151.247
128	10.2.151.248/29	10.2.151.249 – 10.2.151.254	10.2.151.255

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 →