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)10.3.50.0/23

network10.3.50.0/23

broadcast10.3.51.255

first host10.3.50.1

last host10.3.51.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.50.0/23

address00001010.00000011.00110010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.00110010.00000000

broadcast00001010.00000011.00110011.11111111

green = network part, grey = host part

hex0x0a033200

decimal167981568

reverse dns0.50.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3200

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.50.0/30	10.3.50.1 – 10.3.50.2	10.3.50.3
2	10.3.50.4/30	10.3.50.5 – 10.3.50.6	10.3.50.7
3	10.3.50.8/30	10.3.50.9 – 10.3.50.10	10.3.50.11
4	10.3.50.12/30	10.3.50.13 – 10.3.50.14	10.3.50.15
5	10.3.50.16/30	10.3.50.17 – 10.3.50.18	10.3.50.19
6	10.3.50.20/30	10.3.50.21 – 10.3.50.22	10.3.50.23
7	10.3.50.24/30	10.3.50.25 – 10.3.50.26	10.3.50.27
8	10.3.50.28/30	10.3.50.29 – 10.3.50.30	10.3.50.31
9	10.3.50.32/30	10.3.50.33 – 10.3.50.34	10.3.50.35
10	10.3.50.36/30	10.3.50.37 – 10.3.50.38	10.3.50.39
11	10.3.50.40/30	10.3.50.41 – 10.3.50.42	10.3.50.43
12	10.3.50.44/30	10.3.50.45 – 10.3.50.46	10.3.50.47
13	10.3.50.48/30	10.3.50.49 – 10.3.50.50	10.3.50.51
14	10.3.50.52/30	10.3.50.53 – 10.3.50.54	10.3.50.55
15	10.3.50.56/30	10.3.50.57 – 10.3.50.58	10.3.50.59
16	10.3.50.60/30	10.3.50.61 – 10.3.50.62	10.3.50.63
17	10.3.50.64/30	10.3.50.65 – 10.3.50.66	10.3.50.67
18	10.3.50.68/30	10.3.50.69 – 10.3.50.70	10.3.50.71
19	10.3.50.72/30	10.3.50.73 – 10.3.50.74	10.3.50.75
20	10.3.50.76/30	10.3.50.77 – 10.3.50.78	10.3.50.79
21	10.3.50.80/30	10.3.50.81 – 10.3.50.82	10.3.50.83
22	10.3.50.84/30	10.3.50.85 – 10.3.50.86	10.3.50.87
23	10.3.50.88/30	10.3.50.89 – 10.3.50.90	10.3.50.91
24	10.3.50.92/30	10.3.50.93 – 10.3.50.94	10.3.50.95
25	10.3.50.96/30	10.3.50.97 – 10.3.50.98	10.3.50.99
26	10.3.50.100/30	10.3.50.101 – 10.3.50.102	10.3.50.103
27	10.3.50.104/30	10.3.50.105 – 10.3.50.106	10.3.50.107
28	10.3.50.108/30	10.3.50.109 – 10.3.50.110	10.3.50.111
29	10.3.50.112/30	10.3.50.113 – 10.3.50.114	10.3.50.115
30	10.3.50.116/30	10.3.50.117 – 10.3.50.118	10.3.50.119
31	10.3.50.120/30	10.3.50.121 – 10.3.50.122	10.3.50.123
32	10.3.50.124/30	10.3.50.125 – 10.3.50.126	10.3.50.127
33	10.3.50.128/30	10.3.50.129 – 10.3.50.130	10.3.50.131
34	10.3.50.132/30	10.3.50.133 – 10.3.50.134	10.3.50.135
35	10.3.50.136/30	10.3.50.137 – 10.3.50.138	10.3.50.139
36	10.3.50.140/30	10.3.50.141 – 10.3.50.142	10.3.50.143
37	10.3.50.144/30	10.3.50.145 – 10.3.50.146	10.3.50.147
38	10.3.50.148/30	10.3.50.149 – 10.3.50.150	10.3.50.151
39	10.3.50.152/30	10.3.50.153 – 10.3.50.154	10.3.50.155
40	10.3.50.156/30	10.3.50.157 – 10.3.50.158	10.3.50.159
41	10.3.50.160/30	10.3.50.161 – 10.3.50.162	10.3.50.163
42	10.3.50.164/30	10.3.50.165 – 10.3.50.166	10.3.50.167
43	10.3.50.168/30	10.3.50.169 – 10.3.50.170	10.3.50.171
44	10.3.50.172/30	10.3.50.173 – 10.3.50.174	10.3.50.175
45	10.3.50.176/30	10.3.50.177 – 10.3.50.178	10.3.50.179
46	10.3.50.180/30	10.3.50.181 – 10.3.50.182	10.3.50.183
47	10.3.50.184/30	10.3.50.185 – 10.3.50.186	10.3.50.187
48	10.3.50.188/30	10.3.50.189 – 10.3.50.190	10.3.50.191
49	10.3.50.192/30	10.3.50.193 – 10.3.50.194	10.3.50.195
50	10.3.50.196/30	10.3.50.197 – 10.3.50.198	10.3.50.199
51	10.3.50.200/30	10.3.50.201 – 10.3.50.202	10.3.50.203
52	10.3.50.204/30	10.3.50.205 – 10.3.50.206	10.3.50.207
53	10.3.50.208/30	10.3.50.209 – 10.3.50.210	10.3.50.211
54	10.3.50.212/30	10.3.50.213 – 10.3.50.214	10.3.50.215
55	10.3.50.216/30	10.3.50.217 – 10.3.50.218	10.3.50.219
56	10.3.50.220/30	10.3.50.221 – 10.3.50.222	10.3.50.223
57	10.3.50.224/30	10.3.50.225 – 10.3.50.226	10.3.50.227
58	10.3.50.228/30	10.3.50.229 – 10.3.50.230	10.3.50.231
59	10.3.50.232/30	10.3.50.233 – 10.3.50.234	10.3.50.235
60	10.3.50.236/30	10.3.50.237 – 10.3.50.238	10.3.50.239
61	10.3.50.240/30	10.3.50.241 – 10.3.50.242	10.3.50.243
62	10.3.50.244/30	10.3.50.245 – 10.3.50.246	10.3.50.247
63	10.3.50.248/30	10.3.50.249 – 10.3.50.250	10.3.50.251
64	10.3.50.252/30	10.3.50.253 – 10.3.50.254	10.3.50.255
65	10.3.51.0/30	10.3.51.1 – 10.3.51.2	10.3.51.3
66	10.3.51.4/30	10.3.51.5 – 10.3.51.6	10.3.51.7
67	10.3.51.8/30	10.3.51.9 – 10.3.51.10	10.3.51.11
68	10.3.51.12/30	10.3.51.13 – 10.3.51.14	10.3.51.15
69	10.3.51.16/30	10.3.51.17 – 10.3.51.18	10.3.51.19
70	10.3.51.20/30	10.3.51.21 – 10.3.51.22	10.3.51.23
71	10.3.51.24/30	10.3.51.25 – 10.3.51.26	10.3.51.27
72	10.3.51.28/30	10.3.51.29 – 10.3.51.30	10.3.51.31
73	10.3.51.32/30	10.3.51.33 – 10.3.51.34	10.3.51.35
74	10.3.51.36/30	10.3.51.37 – 10.3.51.38	10.3.51.39
75	10.3.51.40/30	10.3.51.41 – 10.3.51.42	10.3.51.43
76	10.3.51.44/30	10.3.51.45 – 10.3.51.46	10.3.51.47
77	10.3.51.48/30	10.3.51.49 – 10.3.51.50	10.3.51.51
78	10.3.51.52/30	10.3.51.53 – 10.3.51.54	10.3.51.55
79	10.3.51.56/30	10.3.51.57 – 10.3.51.58	10.3.51.59
80	10.3.51.60/30	10.3.51.61 – 10.3.51.62	10.3.51.63
81	10.3.51.64/30	10.3.51.65 – 10.3.51.66	10.3.51.67
82	10.3.51.68/30	10.3.51.69 – 10.3.51.70	10.3.51.71
83	10.3.51.72/30	10.3.51.73 – 10.3.51.74	10.3.51.75
84	10.3.51.76/30	10.3.51.77 – 10.3.51.78	10.3.51.79
85	10.3.51.80/30	10.3.51.81 – 10.3.51.82	10.3.51.83
86	10.3.51.84/30	10.3.51.85 – 10.3.51.86	10.3.51.87
87	10.3.51.88/30	10.3.51.89 – 10.3.51.90	10.3.51.91
88	10.3.51.92/30	10.3.51.93 – 10.3.51.94	10.3.51.95
89	10.3.51.96/30	10.3.51.97 – 10.3.51.98	10.3.51.99
90	10.3.51.100/30	10.3.51.101 – 10.3.51.102	10.3.51.103
91	10.3.51.104/30	10.3.51.105 – 10.3.51.106	10.3.51.107
92	10.3.51.108/30	10.3.51.109 – 10.3.51.110	10.3.51.111
93	10.3.51.112/30	10.3.51.113 – 10.3.51.114	10.3.51.115
94	10.3.51.116/30	10.3.51.117 – 10.3.51.118	10.3.51.119
95	10.3.51.120/30	10.3.51.121 – 10.3.51.122	10.3.51.123
96	10.3.51.124/30	10.3.51.125 – 10.3.51.126	10.3.51.127
97	10.3.51.128/30	10.3.51.129 – 10.3.51.130	10.3.51.131
98	10.3.51.132/30	10.3.51.133 – 10.3.51.134	10.3.51.135
99	10.3.51.136/30	10.3.51.137 – 10.3.51.138	10.3.51.139
100	10.3.51.140/30	10.3.51.141 – 10.3.51.142	10.3.51.143
101	10.3.51.144/30	10.3.51.145 – 10.3.51.146	10.3.51.147
102	10.3.51.148/30	10.3.51.149 – 10.3.51.150	10.3.51.151
103	10.3.51.152/30	10.3.51.153 – 10.3.51.154	10.3.51.155
104	10.3.51.156/30	10.3.51.157 – 10.3.51.158	10.3.51.159
105	10.3.51.160/30	10.3.51.161 – 10.3.51.162	10.3.51.163
106	10.3.51.164/30	10.3.51.165 – 10.3.51.166	10.3.51.167
107	10.3.51.168/30	10.3.51.169 – 10.3.51.170	10.3.51.171
108	10.3.51.172/30	10.3.51.173 – 10.3.51.174	10.3.51.175
109	10.3.51.176/30	10.3.51.177 – 10.3.51.178	10.3.51.179
110	10.3.51.180/30	10.3.51.181 – 10.3.51.182	10.3.51.183
111	10.3.51.184/30	10.3.51.185 – 10.3.51.186	10.3.51.187
112	10.3.51.188/30	10.3.51.189 – 10.3.51.190	10.3.51.191
113	10.3.51.192/30	10.3.51.193 – 10.3.51.194	10.3.51.195
114	10.3.51.196/30	10.3.51.197 – 10.3.51.198	10.3.51.199
115	10.3.51.200/30	10.3.51.201 – 10.3.51.202	10.3.51.203
116	10.3.51.204/30	10.3.51.205 – 10.3.51.206	10.3.51.207
117	10.3.51.208/30	10.3.51.209 – 10.3.51.210	10.3.51.211
118	10.3.51.212/30	10.3.51.213 – 10.3.51.214	10.3.51.215
119	10.3.51.216/30	10.3.51.217 – 10.3.51.218	10.3.51.219
120	10.3.51.220/30	10.3.51.221 – 10.3.51.222	10.3.51.223
121	10.3.51.224/30	10.3.51.225 – 10.3.51.226	10.3.51.227
122	10.3.51.228/30	10.3.51.229 – 10.3.51.230	10.3.51.231
123	10.3.51.232/30	10.3.51.233 – 10.3.51.234	10.3.51.235
124	10.3.51.236/30	10.3.51.237 – 10.3.51.238	10.3.51.239
125	10.3.51.240/30	10.3.51.241 – 10.3.51.242	10.3.51.243
126	10.3.51.244/30	10.3.51.245 – 10.3.51.246	10.3.51.247
127	10.3.51.248/30	10.3.51.249 – 10.3.51.250	10.3.51.251
128	10.3.51.252/30	10.3.51.253 – 10.3.51.254	10.3.51.255

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 →