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)10.3.62.0/23

network10.3.62.0/23

broadcast10.3.63.255

first host10.3.62.1

last host10.3.63.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.62.0/23

address00001010.00000011.00111110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.00111110.00000000

broadcast00001010.00000011.00111111.11111111

green = network part, grey = host part

hex0x0a033e00

decimal167984640

reverse dns0.62.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3e00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.62.0/30	10.3.62.1 – 10.3.62.2	10.3.62.3
2	10.3.62.4/30	10.3.62.5 – 10.3.62.6	10.3.62.7
3	10.3.62.8/30	10.3.62.9 – 10.3.62.10	10.3.62.11
4	10.3.62.12/30	10.3.62.13 – 10.3.62.14	10.3.62.15
5	10.3.62.16/30	10.3.62.17 – 10.3.62.18	10.3.62.19
6	10.3.62.20/30	10.3.62.21 – 10.3.62.22	10.3.62.23
7	10.3.62.24/30	10.3.62.25 – 10.3.62.26	10.3.62.27
8	10.3.62.28/30	10.3.62.29 – 10.3.62.30	10.3.62.31
9	10.3.62.32/30	10.3.62.33 – 10.3.62.34	10.3.62.35
10	10.3.62.36/30	10.3.62.37 – 10.3.62.38	10.3.62.39
11	10.3.62.40/30	10.3.62.41 – 10.3.62.42	10.3.62.43
12	10.3.62.44/30	10.3.62.45 – 10.3.62.46	10.3.62.47
13	10.3.62.48/30	10.3.62.49 – 10.3.62.50	10.3.62.51
14	10.3.62.52/30	10.3.62.53 – 10.3.62.54	10.3.62.55
15	10.3.62.56/30	10.3.62.57 – 10.3.62.58	10.3.62.59
16	10.3.62.60/30	10.3.62.61 – 10.3.62.62	10.3.62.63
17	10.3.62.64/30	10.3.62.65 – 10.3.62.66	10.3.62.67
18	10.3.62.68/30	10.3.62.69 – 10.3.62.70	10.3.62.71
19	10.3.62.72/30	10.3.62.73 – 10.3.62.74	10.3.62.75
20	10.3.62.76/30	10.3.62.77 – 10.3.62.78	10.3.62.79
21	10.3.62.80/30	10.3.62.81 – 10.3.62.82	10.3.62.83
22	10.3.62.84/30	10.3.62.85 – 10.3.62.86	10.3.62.87
23	10.3.62.88/30	10.3.62.89 – 10.3.62.90	10.3.62.91
24	10.3.62.92/30	10.3.62.93 – 10.3.62.94	10.3.62.95
25	10.3.62.96/30	10.3.62.97 – 10.3.62.98	10.3.62.99
26	10.3.62.100/30	10.3.62.101 – 10.3.62.102	10.3.62.103
27	10.3.62.104/30	10.3.62.105 – 10.3.62.106	10.3.62.107
28	10.3.62.108/30	10.3.62.109 – 10.3.62.110	10.3.62.111
29	10.3.62.112/30	10.3.62.113 – 10.3.62.114	10.3.62.115
30	10.3.62.116/30	10.3.62.117 – 10.3.62.118	10.3.62.119
31	10.3.62.120/30	10.3.62.121 – 10.3.62.122	10.3.62.123
32	10.3.62.124/30	10.3.62.125 – 10.3.62.126	10.3.62.127
33	10.3.62.128/30	10.3.62.129 – 10.3.62.130	10.3.62.131
34	10.3.62.132/30	10.3.62.133 – 10.3.62.134	10.3.62.135
35	10.3.62.136/30	10.3.62.137 – 10.3.62.138	10.3.62.139
36	10.3.62.140/30	10.3.62.141 – 10.3.62.142	10.3.62.143
37	10.3.62.144/30	10.3.62.145 – 10.3.62.146	10.3.62.147
38	10.3.62.148/30	10.3.62.149 – 10.3.62.150	10.3.62.151
39	10.3.62.152/30	10.3.62.153 – 10.3.62.154	10.3.62.155
40	10.3.62.156/30	10.3.62.157 – 10.3.62.158	10.3.62.159
41	10.3.62.160/30	10.3.62.161 – 10.3.62.162	10.3.62.163
42	10.3.62.164/30	10.3.62.165 – 10.3.62.166	10.3.62.167
43	10.3.62.168/30	10.3.62.169 – 10.3.62.170	10.3.62.171
44	10.3.62.172/30	10.3.62.173 – 10.3.62.174	10.3.62.175
45	10.3.62.176/30	10.3.62.177 – 10.3.62.178	10.3.62.179
46	10.3.62.180/30	10.3.62.181 – 10.3.62.182	10.3.62.183
47	10.3.62.184/30	10.3.62.185 – 10.3.62.186	10.3.62.187
48	10.3.62.188/30	10.3.62.189 – 10.3.62.190	10.3.62.191
49	10.3.62.192/30	10.3.62.193 – 10.3.62.194	10.3.62.195
50	10.3.62.196/30	10.3.62.197 – 10.3.62.198	10.3.62.199
51	10.3.62.200/30	10.3.62.201 – 10.3.62.202	10.3.62.203
52	10.3.62.204/30	10.3.62.205 – 10.3.62.206	10.3.62.207
53	10.3.62.208/30	10.3.62.209 – 10.3.62.210	10.3.62.211
54	10.3.62.212/30	10.3.62.213 – 10.3.62.214	10.3.62.215
55	10.3.62.216/30	10.3.62.217 – 10.3.62.218	10.3.62.219
56	10.3.62.220/30	10.3.62.221 – 10.3.62.222	10.3.62.223
57	10.3.62.224/30	10.3.62.225 – 10.3.62.226	10.3.62.227
58	10.3.62.228/30	10.3.62.229 – 10.3.62.230	10.3.62.231
59	10.3.62.232/30	10.3.62.233 – 10.3.62.234	10.3.62.235
60	10.3.62.236/30	10.3.62.237 – 10.3.62.238	10.3.62.239
61	10.3.62.240/30	10.3.62.241 – 10.3.62.242	10.3.62.243
62	10.3.62.244/30	10.3.62.245 – 10.3.62.246	10.3.62.247
63	10.3.62.248/30	10.3.62.249 – 10.3.62.250	10.3.62.251
64	10.3.62.252/30	10.3.62.253 – 10.3.62.254	10.3.62.255
65	10.3.63.0/30	10.3.63.1 – 10.3.63.2	10.3.63.3
66	10.3.63.4/30	10.3.63.5 – 10.3.63.6	10.3.63.7
67	10.3.63.8/30	10.3.63.9 – 10.3.63.10	10.3.63.11
68	10.3.63.12/30	10.3.63.13 – 10.3.63.14	10.3.63.15
69	10.3.63.16/30	10.3.63.17 – 10.3.63.18	10.3.63.19
70	10.3.63.20/30	10.3.63.21 – 10.3.63.22	10.3.63.23
71	10.3.63.24/30	10.3.63.25 – 10.3.63.26	10.3.63.27
72	10.3.63.28/30	10.3.63.29 – 10.3.63.30	10.3.63.31
73	10.3.63.32/30	10.3.63.33 – 10.3.63.34	10.3.63.35
74	10.3.63.36/30	10.3.63.37 – 10.3.63.38	10.3.63.39
75	10.3.63.40/30	10.3.63.41 – 10.3.63.42	10.3.63.43
76	10.3.63.44/30	10.3.63.45 – 10.3.63.46	10.3.63.47
77	10.3.63.48/30	10.3.63.49 – 10.3.63.50	10.3.63.51
78	10.3.63.52/30	10.3.63.53 – 10.3.63.54	10.3.63.55
79	10.3.63.56/30	10.3.63.57 – 10.3.63.58	10.3.63.59
80	10.3.63.60/30	10.3.63.61 – 10.3.63.62	10.3.63.63
81	10.3.63.64/30	10.3.63.65 – 10.3.63.66	10.3.63.67
82	10.3.63.68/30	10.3.63.69 – 10.3.63.70	10.3.63.71
83	10.3.63.72/30	10.3.63.73 – 10.3.63.74	10.3.63.75
84	10.3.63.76/30	10.3.63.77 – 10.3.63.78	10.3.63.79
85	10.3.63.80/30	10.3.63.81 – 10.3.63.82	10.3.63.83
86	10.3.63.84/30	10.3.63.85 – 10.3.63.86	10.3.63.87
87	10.3.63.88/30	10.3.63.89 – 10.3.63.90	10.3.63.91
88	10.3.63.92/30	10.3.63.93 – 10.3.63.94	10.3.63.95
89	10.3.63.96/30	10.3.63.97 – 10.3.63.98	10.3.63.99
90	10.3.63.100/30	10.3.63.101 – 10.3.63.102	10.3.63.103
91	10.3.63.104/30	10.3.63.105 – 10.3.63.106	10.3.63.107
92	10.3.63.108/30	10.3.63.109 – 10.3.63.110	10.3.63.111
93	10.3.63.112/30	10.3.63.113 – 10.3.63.114	10.3.63.115
94	10.3.63.116/30	10.3.63.117 – 10.3.63.118	10.3.63.119
95	10.3.63.120/30	10.3.63.121 – 10.3.63.122	10.3.63.123
96	10.3.63.124/30	10.3.63.125 – 10.3.63.126	10.3.63.127
97	10.3.63.128/30	10.3.63.129 – 10.3.63.130	10.3.63.131
98	10.3.63.132/30	10.3.63.133 – 10.3.63.134	10.3.63.135
99	10.3.63.136/30	10.3.63.137 – 10.3.63.138	10.3.63.139
100	10.3.63.140/30	10.3.63.141 – 10.3.63.142	10.3.63.143
101	10.3.63.144/30	10.3.63.145 – 10.3.63.146	10.3.63.147
102	10.3.63.148/30	10.3.63.149 – 10.3.63.150	10.3.63.151
103	10.3.63.152/30	10.3.63.153 – 10.3.63.154	10.3.63.155
104	10.3.63.156/30	10.3.63.157 – 10.3.63.158	10.3.63.159
105	10.3.63.160/30	10.3.63.161 – 10.3.63.162	10.3.63.163
106	10.3.63.164/30	10.3.63.165 – 10.3.63.166	10.3.63.167
107	10.3.63.168/30	10.3.63.169 – 10.3.63.170	10.3.63.171
108	10.3.63.172/30	10.3.63.173 – 10.3.63.174	10.3.63.175
109	10.3.63.176/30	10.3.63.177 – 10.3.63.178	10.3.63.179
110	10.3.63.180/30	10.3.63.181 – 10.3.63.182	10.3.63.183
111	10.3.63.184/30	10.3.63.185 – 10.3.63.186	10.3.63.187
112	10.3.63.188/30	10.3.63.189 – 10.3.63.190	10.3.63.191
113	10.3.63.192/30	10.3.63.193 – 10.3.63.194	10.3.63.195
114	10.3.63.196/30	10.3.63.197 – 10.3.63.198	10.3.63.199
115	10.3.63.200/30	10.3.63.201 – 10.3.63.202	10.3.63.203
116	10.3.63.204/30	10.3.63.205 – 10.3.63.206	10.3.63.207
117	10.3.63.208/30	10.3.63.209 – 10.3.63.210	10.3.63.211
118	10.3.63.212/30	10.3.63.213 – 10.3.63.214	10.3.63.215
119	10.3.63.216/30	10.3.63.217 – 10.3.63.218	10.3.63.219
120	10.3.63.220/30	10.3.63.221 – 10.3.63.222	10.3.63.223
121	10.3.63.224/30	10.3.63.225 – 10.3.63.226	10.3.63.227
122	10.3.63.228/30	10.3.63.229 – 10.3.63.230	10.3.63.231
123	10.3.63.232/30	10.3.63.233 – 10.3.63.234	10.3.63.235
124	10.3.63.236/30	10.3.63.237 – 10.3.63.238	10.3.63.239
125	10.3.63.240/30	10.3.63.241 – 10.3.63.242	10.3.63.243
126	10.3.63.244/30	10.3.63.245 – 10.3.63.246	10.3.63.247
127	10.3.63.248/30	10.3.63.249 – 10.3.63.250	10.3.63.251
128	10.3.63.252/30	10.3.63.253 – 10.3.63.254	10.3.63.255

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 →