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)10.3.162.0/23

network10.3.162.0/23

broadcast10.3.163.255

first host10.3.162.1

last host10.3.163.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.162.0/23

address00001010.00000011.10100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.10100010.00000000

broadcast00001010.00000011.10100011.11111111

green = network part, grey = host part

hex0x0a03a200

decimal168010240

reverse dns0.162.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a200

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.162.0/30	10.3.162.1 – 10.3.162.2	10.3.162.3
2	10.3.162.4/30	10.3.162.5 – 10.3.162.6	10.3.162.7
3	10.3.162.8/30	10.3.162.9 – 10.3.162.10	10.3.162.11
4	10.3.162.12/30	10.3.162.13 – 10.3.162.14	10.3.162.15
5	10.3.162.16/30	10.3.162.17 – 10.3.162.18	10.3.162.19
6	10.3.162.20/30	10.3.162.21 – 10.3.162.22	10.3.162.23
7	10.3.162.24/30	10.3.162.25 – 10.3.162.26	10.3.162.27
8	10.3.162.28/30	10.3.162.29 – 10.3.162.30	10.3.162.31
9	10.3.162.32/30	10.3.162.33 – 10.3.162.34	10.3.162.35
10	10.3.162.36/30	10.3.162.37 – 10.3.162.38	10.3.162.39
11	10.3.162.40/30	10.3.162.41 – 10.3.162.42	10.3.162.43
12	10.3.162.44/30	10.3.162.45 – 10.3.162.46	10.3.162.47
13	10.3.162.48/30	10.3.162.49 – 10.3.162.50	10.3.162.51
14	10.3.162.52/30	10.3.162.53 – 10.3.162.54	10.3.162.55
15	10.3.162.56/30	10.3.162.57 – 10.3.162.58	10.3.162.59
16	10.3.162.60/30	10.3.162.61 – 10.3.162.62	10.3.162.63
17	10.3.162.64/30	10.3.162.65 – 10.3.162.66	10.3.162.67
18	10.3.162.68/30	10.3.162.69 – 10.3.162.70	10.3.162.71
19	10.3.162.72/30	10.3.162.73 – 10.3.162.74	10.3.162.75
20	10.3.162.76/30	10.3.162.77 – 10.3.162.78	10.3.162.79
21	10.3.162.80/30	10.3.162.81 – 10.3.162.82	10.3.162.83
22	10.3.162.84/30	10.3.162.85 – 10.3.162.86	10.3.162.87
23	10.3.162.88/30	10.3.162.89 – 10.3.162.90	10.3.162.91
24	10.3.162.92/30	10.3.162.93 – 10.3.162.94	10.3.162.95
25	10.3.162.96/30	10.3.162.97 – 10.3.162.98	10.3.162.99
26	10.3.162.100/30	10.3.162.101 – 10.3.162.102	10.3.162.103
27	10.3.162.104/30	10.3.162.105 – 10.3.162.106	10.3.162.107
28	10.3.162.108/30	10.3.162.109 – 10.3.162.110	10.3.162.111
29	10.3.162.112/30	10.3.162.113 – 10.3.162.114	10.3.162.115
30	10.3.162.116/30	10.3.162.117 – 10.3.162.118	10.3.162.119
31	10.3.162.120/30	10.3.162.121 – 10.3.162.122	10.3.162.123
32	10.3.162.124/30	10.3.162.125 – 10.3.162.126	10.3.162.127
33	10.3.162.128/30	10.3.162.129 – 10.3.162.130	10.3.162.131
34	10.3.162.132/30	10.3.162.133 – 10.3.162.134	10.3.162.135
35	10.3.162.136/30	10.3.162.137 – 10.3.162.138	10.3.162.139
36	10.3.162.140/30	10.3.162.141 – 10.3.162.142	10.3.162.143
37	10.3.162.144/30	10.3.162.145 – 10.3.162.146	10.3.162.147
38	10.3.162.148/30	10.3.162.149 – 10.3.162.150	10.3.162.151
39	10.3.162.152/30	10.3.162.153 – 10.3.162.154	10.3.162.155
40	10.3.162.156/30	10.3.162.157 – 10.3.162.158	10.3.162.159
41	10.3.162.160/30	10.3.162.161 – 10.3.162.162	10.3.162.163
42	10.3.162.164/30	10.3.162.165 – 10.3.162.166	10.3.162.167
43	10.3.162.168/30	10.3.162.169 – 10.3.162.170	10.3.162.171
44	10.3.162.172/30	10.3.162.173 – 10.3.162.174	10.3.162.175
45	10.3.162.176/30	10.3.162.177 – 10.3.162.178	10.3.162.179
46	10.3.162.180/30	10.3.162.181 – 10.3.162.182	10.3.162.183
47	10.3.162.184/30	10.3.162.185 – 10.3.162.186	10.3.162.187
48	10.3.162.188/30	10.3.162.189 – 10.3.162.190	10.3.162.191
49	10.3.162.192/30	10.3.162.193 – 10.3.162.194	10.3.162.195
50	10.3.162.196/30	10.3.162.197 – 10.3.162.198	10.3.162.199
51	10.3.162.200/30	10.3.162.201 – 10.3.162.202	10.3.162.203
52	10.3.162.204/30	10.3.162.205 – 10.3.162.206	10.3.162.207
53	10.3.162.208/30	10.3.162.209 – 10.3.162.210	10.3.162.211
54	10.3.162.212/30	10.3.162.213 – 10.3.162.214	10.3.162.215
55	10.3.162.216/30	10.3.162.217 – 10.3.162.218	10.3.162.219
56	10.3.162.220/30	10.3.162.221 – 10.3.162.222	10.3.162.223
57	10.3.162.224/30	10.3.162.225 – 10.3.162.226	10.3.162.227
58	10.3.162.228/30	10.3.162.229 – 10.3.162.230	10.3.162.231
59	10.3.162.232/30	10.3.162.233 – 10.3.162.234	10.3.162.235
60	10.3.162.236/30	10.3.162.237 – 10.3.162.238	10.3.162.239
61	10.3.162.240/30	10.3.162.241 – 10.3.162.242	10.3.162.243
62	10.3.162.244/30	10.3.162.245 – 10.3.162.246	10.3.162.247
63	10.3.162.248/30	10.3.162.249 – 10.3.162.250	10.3.162.251
64	10.3.162.252/30	10.3.162.253 – 10.3.162.254	10.3.162.255
65	10.3.163.0/30	10.3.163.1 – 10.3.163.2	10.3.163.3
66	10.3.163.4/30	10.3.163.5 – 10.3.163.6	10.3.163.7
67	10.3.163.8/30	10.3.163.9 – 10.3.163.10	10.3.163.11
68	10.3.163.12/30	10.3.163.13 – 10.3.163.14	10.3.163.15
69	10.3.163.16/30	10.3.163.17 – 10.3.163.18	10.3.163.19
70	10.3.163.20/30	10.3.163.21 – 10.3.163.22	10.3.163.23
71	10.3.163.24/30	10.3.163.25 – 10.3.163.26	10.3.163.27
72	10.3.163.28/30	10.3.163.29 – 10.3.163.30	10.3.163.31
73	10.3.163.32/30	10.3.163.33 – 10.3.163.34	10.3.163.35
74	10.3.163.36/30	10.3.163.37 – 10.3.163.38	10.3.163.39
75	10.3.163.40/30	10.3.163.41 – 10.3.163.42	10.3.163.43
76	10.3.163.44/30	10.3.163.45 – 10.3.163.46	10.3.163.47
77	10.3.163.48/30	10.3.163.49 – 10.3.163.50	10.3.163.51
78	10.3.163.52/30	10.3.163.53 – 10.3.163.54	10.3.163.55
79	10.3.163.56/30	10.3.163.57 – 10.3.163.58	10.3.163.59
80	10.3.163.60/30	10.3.163.61 – 10.3.163.62	10.3.163.63
81	10.3.163.64/30	10.3.163.65 – 10.3.163.66	10.3.163.67
82	10.3.163.68/30	10.3.163.69 – 10.3.163.70	10.3.163.71
83	10.3.163.72/30	10.3.163.73 – 10.3.163.74	10.3.163.75
84	10.3.163.76/30	10.3.163.77 – 10.3.163.78	10.3.163.79
85	10.3.163.80/30	10.3.163.81 – 10.3.163.82	10.3.163.83
86	10.3.163.84/30	10.3.163.85 – 10.3.163.86	10.3.163.87
87	10.3.163.88/30	10.3.163.89 – 10.3.163.90	10.3.163.91
88	10.3.163.92/30	10.3.163.93 – 10.3.163.94	10.3.163.95
89	10.3.163.96/30	10.3.163.97 – 10.3.163.98	10.3.163.99
90	10.3.163.100/30	10.3.163.101 – 10.3.163.102	10.3.163.103
91	10.3.163.104/30	10.3.163.105 – 10.3.163.106	10.3.163.107
92	10.3.163.108/30	10.3.163.109 – 10.3.163.110	10.3.163.111
93	10.3.163.112/30	10.3.163.113 – 10.3.163.114	10.3.163.115
94	10.3.163.116/30	10.3.163.117 – 10.3.163.118	10.3.163.119
95	10.3.163.120/30	10.3.163.121 – 10.3.163.122	10.3.163.123
96	10.3.163.124/30	10.3.163.125 – 10.3.163.126	10.3.163.127
97	10.3.163.128/30	10.3.163.129 – 10.3.163.130	10.3.163.131
98	10.3.163.132/30	10.3.163.133 – 10.3.163.134	10.3.163.135
99	10.3.163.136/30	10.3.163.137 – 10.3.163.138	10.3.163.139
100	10.3.163.140/30	10.3.163.141 – 10.3.163.142	10.3.163.143
101	10.3.163.144/30	10.3.163.145 – 10.3.163.146	10.3.163.147
102	10.3.163.148/30	10.3.163.149 – 10.3.163.150	10.3.163.151
103	10.3.163.152/30	10.3.163.153 – 10.3.163.154	10.3.163.155
104	10.3.163.156/30	10.3.163.157 – 10.3.163.158	10.3.163.159
105	10.3.163.160/30	10.3.163.161 – 10.3.163.162	10.3.163.163
106	10.3.163.164/30	10.3.163.165 – 10.3.163.166	10.3.163.167
107	10.3.163.168/30	10.3.163.169 – 10.3.163.170	10.3.163.171
108	10.3.163.172/30	10.3.163.173 – 10.3.163.174	10.3.163.175
109	10.3.163.176/30	10.3.163.177 – 10.3.163.178	10.3.163.179
110	10.3.163.180/30	10.3.163.181 – 10.3.163.182	10.3.163.183
111	10.3.163.184/30	10.3.163.185 – 10.3.163.186	10.3.163.187
112	10.3.163.188/30	10.3.163.189 – 10.3.163.190	10.3.163.191
113	10.3.163.192/30	10.3.163.193 – 10.3.163.194	10.3.163.195
114	10.3.163.196/30	10.3.163.197 – 10.3.163.198	10.3.163.199
115	10.3.163.200/30	10.3.163.201 – 10.3.163.202	10.3.163.203
116	10.3.163.204/30	10.3.163.205 – 10.3.163.206	10.3.163.207
117	10.3.163.208/30	10.3.163.209 – 10.3.163.210	10.3.163.211
118	10.3.163.212/30	10.3.163.213 – 10.3.163.214	10.3.163.215
119	10.3.163.216/30	10.3.163.217 – 10.3.163.218	10.3.163.219
120	10.3.163.220/30	10.3.163.221 – 10.3.163.222	10.3.163.223
121	10.3.163.224/30	10.3.163.225 – 10.3.163.226	10.3.163.227
122	10.3.163.228/30	10.3.163.229 – 10.3.163.230	10.3.163.231
123	10.3.163.232/30	10.3.163.233 – 10.3.163.234	10.3.163.235
124	10.3.163.236/30	10.3.163.237 – 10.3.163.238	10.3.163.239
125	10.3.163.240/30	10.3.163.241 – 10.3.163.242	10.3.163.243
126	10.3.163.244/30	10.3.163.245 – 10.3.163.246	10.3.163.247
127	10.3.163.248/30	10.3.163.249 – 10.3.163.250	10.3.163.251
128	10.3.163.252/30	10.3.163.253 – 10.3.163.254	10.3.163.255

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 /23
/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	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →