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)10.2.214.0/23

network10.2.214.0/23

broadcast10.2.215.255

first host10.2.214.1

last host10.2.215.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.214.0/23

address00001010.00000010.11010110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.11010110.00000000

broadcast00001010.00000010.11010111.11111111

green = network part, grey = host part

hex0x0a02d600

decimal167958016

reverse dns0.214.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:d600

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.214.0/30	10.2.214.1 – 10.2.214.2	10.2.214.3
2	10.2.214.4/30	10.2.214.5 – 10.2.214.6	10.2.214.7
3	10.2.214.8/30	10.2.214.9 – 10.2.214.10	10.2.214.11
4	10.2.214.12/30	10.2.214.13 – 10.2.214.14	10.2.214.15
5	10.2.214.16/30	10.2.214.17 – 10.2.214.18	10.2.214.19
6	10.2.214.20/30	10.2.214.21 – 10.2.214.22	10.2.214.23
7	10.2.214.24/30	10.2.214.25 – 10.2.214.26	10.2.214.27
8	10.2.214.28/30	10.2.214.29 – 10.2.214.30	10.2.214.31
9	10.2.214.32/30	10.2.214.33 – 10.2.214.34	10.2.214.35
10	10.2.214.36/30	10.2.214.37 – 10.2.214.38	10.2.214.39
11	10.2.214.40/30	10.2.214.41 – 10.2.214.42	10.2.214.43
12	10.2.214.44/30	10.2.214.45 – 10.2.214.46	10.2.214.47
13	10.2.214.48/30	10.2.214.49 – 10.2.214.50	10.2.214.51
14	10.2.214.52/30	10.2.214.53 – 10.2.214.54	10.2.214.55
15	10.2.214.56/30	10.2.214.57 – 10.2.214.58	10.2.214.59
16	10.2.214.60/30	10.2.214.61 – 10.2.214.62	10.2.214.63
17	10.2.214.64/30	10.2.214.65 – 10.2.214.66	10.2.214.67
18	10.2.214.68/30	10.2.214.69 – 10.2.214.70	10.2.214.71
19	10.2.214.72/30	10.2.214.73 – 10.2.214.74	10.2.214.75
20	10.2.214.76/30	10.2.214.77 – 10.2.214.78	10.2.214.79
21	10.2.214.80/30	10.2.214.81 – 10.2.214.82	10.2.214.83
22	10.2.214.84/30	10.2.214.85 – 10.2.214.86	10.2.214.87
23	10.2.214.88/30	10.2.214.89 – 10.2.214.90	10.2.214.91
24	10.2.214.92/30	10.2.214.93 – 10.2.214.94	10.2.214.95
25	10.2.214.96/30	10.2.214.97 – 10.2.214.98	10.2.214.99
26	10.2.214.100/30	10.2.214.101 – 10.2.214.102	10.2.214.103
27	10.2.214.104/30	10.2.214.105 – 10.2.214.106	10.2.214.107
28	10.2.214.108/30	10.2.214.109 – 10.2.214.110	10.2.214.111
29	10.2.214.112/30	10.2.214.113 – 10.2.214.114	10.2.214.115
30	10.2.214.116/30	10.2.214.117 – 10.2.214.118	10.2.214.119
31	10.2.214.120/30	10.2.214.121 – 10.2.214.122	10.2.214.123
32	10.2.214.124/30	10.2.214.125 – 10.2.214.126	10.2.214.127
33	10.2.214.128/30	10.2.214.129 – 10.2.214.130	10.2.214.131
34	10.2.214.132/30	10.2.214.133 – 10.2.214.134	10.2.214.135
35	10.2.214.136/30	10.2.214.137 – 10.2.214.138	10.2.214.139
36	10.2.214.140/30	10.2.214.141 – 10.2.214.142	10.2.214.143
37	10.2.214.144/30	10.2.214.145 – 10.2.214.146	10.2.214.147
38	10.2.214.148/30	10.2.214.149 – 10.2.214.150	10.2.214.151
39	10.2.214.152/30	10.2.214.153 – 10.2.214.154	10.2.214.155
40	10.2.214.156/30	10.2.214.157 – 10.2.214.158	10.2.214.159
41	10.2.214.160/30	10.2.214.161 – 10.2.214.162	10.2.214.163
42	10.2.214.164/30	10.2.214.165 – 10.2.214.166	10.2.214.167
43	10.2.214.168/30	10.2.214.169 – 10.2.214.170	10.2.214.171
44	10.2.214.172/30	10.2.214.173 – 10.2.214.174	10.2.214.175
45	10.2.214.176/30	10.2.214.177 – 10.2.214.178	10.2.214.179
46	10.2.214.180/30	10.2.214.181 – 10.2.214.182	10.2.214.183
47	10.2.214.184/30	10.2.214.185 – 10.2.214.186	10.2.214.187
48	10.2.214.188/30	10.2.214.189 – 10.2.214.190	10.2.214.191
49	10.2.214.192/30	10.2.214.193 – 10.2.214.194	10.2.214.195
50	10.2.214.196/30	10.2.214.197 – 10.2.214.198	10.2.214.199
51	10.2.214.200/30	10.2.214.201 – 10.2.214.202	10.2.214.203
52	10.2.214.204/30	10.2.214.205 – 10.2.214.206	10.2.214.207
53	10.2.214.208/30	10.2.214.209 – 10.2.214.210	10.2.214.211
54	10.2.214.212/30	10.2.214.213 – 10.2.214.214	10.2.214.215
55	10.2.214.216/30	10.2.214.217 – 10.2.214.218	10.2.214.219
56	10.2.214.220/30	10.2.214.221 – 10.2.214.222	10.2.214.223
57	10.2.214.224/30	10.2.214.225 – 10.2.214.226	10.2.214.227
58	10.2.214.228/30	10.2.214.229 – 10.2.214.230	10.2.214.231
59	10.2.214.232/30	10.2.214.233 – 10.2.214.234	10.2.214.235
60	10.2.214.236/30	10.2.214.237 – 10.2.214.238	10.2.214.239
61	10.2.214.240/30	10.2.214.241 – 10.2.214.242	10.2.214.243
62	10.2.214.244/30	10.2.214.245 – 10.2.214.246	10.2.214.247
63	10.2.214.248/30	10.2.214.249 – 10.2.214.250	10.2.214.251
64	10.2.214.252/30	10.2.214.253 – 10.2.214.254	10.2.214.255
65	10.2.215.0/30	10.2.215.1 – 10.2.215.2	10.2.215.3
66	10.2.215.4/30	10.2.215.5 – 10.2.215.6	10.2.215.7
67	10.2.215.8/30	10.2.215.9 – 10.2.215.10	10.2.215.11
68	10.2.215.12/30	10.2.215.13 – 10.2.215.14	10.2.215.15
69	10.2.215.16/30	10.2.215.17 – 10.2.215.18	10.2.215.19
70	10.2.215.20/30	10.2.215.21 – 10.2.215.22	10.2.215.23
71	10.2.215.24/30	10.2.215.25 – 10.2.215.26	10.2.215.27
72	10.2.215.28/30	10.2.215.29 – 10.2.215.30	10.2.215.31
73	10.2.215.32/30	10.2.215.33 – 10.2.215.34	10.2.215.35
74	10.2.215.36/30	10.2.215.37 – 10.2.215.38	10.2.215.39
75	10.2.215.40/30	10.2.215.41 – 10.2.215.42	10.2.215.43
76	10.2.215.44/30	10.2.215.45 – 10.2.215.46	10.2.215.47
77	10.2.215.48/30	10.2.215.49 – 10.2.215.50	10.2.215.51
78	10.2.215.52/30	10.2.215.53 – 10.2.215.54	10.2.215.55
79	10.2.215.56/30	10.2.215.57 – 10.2.215.58	10.2.215.59
80	10.2.215.60/30	10.2.215.61 – 10.2.215.62	10.2.215.63
81	10.2.215.64/30	10.2.215.65 – 10.2.215.66	10.2.215.67
82	10.2.215.68/30	10.2.215.69 – 10.2.215.70	10.2.215.71
83	10.2.215.72/30	10.2.215.73 – 10.2.215.74	10.2.215.75
84	10.2.215.76/30	10.2.215.77 – 10.2.215.78	10.2.215.79
85	10.2.215.80/30	10.2.215.81 – 10.2.215.82	10.2.215.83
86	10.2.215.84/30	10.2.215.85 – 10.2.215.86	10.2.215.87
87	10.2.215.88/30	10.2.215.89 – 10.2.215.90	10.2.215.91
88	10.2.215.92/30	10.2.215.93 – 10.2.215.94	10.2.215.95
89	10.2.215.96/30	10.2.215.97 – 10.2.215.98	10.2.215.99
90	10.2.215.100/30	10.2.215.101 – 10.2.215.102	10.2.215.103
91	10.2.215.104/30	10.2.215.105 – 10.2.215.106	10.2.215.107
92	10.2.215.108/30	10.2.215.109 – 10.2.215.110	10.2.215.111
93	10.2.215.112/30	10.2.215.113 – 10.2.215.114	10.2.215.115
94	10.2.215.116/30	10.2.215.117 – 10.2.215.118	10.2.215.119
95	10.2.215.120/30	10.2.215.121 – 10.2.215.122	10.2.215.123
96	10.2.215.124/30	10.2.215.125 – 10.2.215.126	10.2.215.127
97	10.2.215.128/30	10.2.215.129 – 10.2.215.130	10.2.215.131
98	10.2.215.132/30	10.2.215.133 – 10.2.215.134	10.2.215.135
99	10.2.215.136/30	10.2.215.137 – 10.2.215.138	10.2.215.139
100	10.2.215.140/30	10.2.215.141 – 10.2.215.142	10.2.215.143
101	10.2.215.144/30	10.2.215.145 – 10.2.215.146	10.2.215.147
102	10.2.215.148/30	10.2.215.149 – 10.2.215.150	10.2.215.151
103	10.2.215.152/30	10.2.215.153 – 10.2.215.154	10.2.215.155
104	10.2.215.156/30	10.2.215.157 – 10.2.215.158	10.2.215.159
105	10.2.215.160/30	10.2.215.161 – 10.2.215.162	10.2.215.163
106	10.2.215.164/30	10.2.215.165 – 10.2.215.166	10.2.215.167
107	10.2.215.168/30	10.2.215.169 – 10.2.215.170	10.2.215.171
108	10.2.215.172/30	10.2.215.173 – 10.2.215.174	10.2.215.175
109	10.2.215.176/30	10.2.215.177 – 10.2.215.178	10.2.215.179
110	10.2.215.180/30	10.2.215.181 – 10.2.215.182	10.2.215.183
111	10.2.215.184/30	10.2.215.185 – 10.2.215.186	10.2.215.187
112	10.2.215.188/30	10.2.215.189 – 10.2.215.190	10.2.215.191
113	10.2.215.192/30	10.2.215.193 – 10.2.215.194	10.2.215.195
114	10.2.215.196/30	10.2.215.197 – 10.2.215.198	10.2.215.199
115	10.2.215.200/30	10.2.215.201 – 10.2.215.202	10.2.215.203
116	10.2.215.204/30	10.2.215.205 – 10.2.215.206	10.2.215.207
117	10.2.215.208/30	10.2.215.209 – 10.2.215.210	10.2.215.211
118	10.2.215.212/30	10.2.215.213 – 10.2.215.214	10.2.215.215
119	10.2.215.216/30	10.2.215.217 – 10.2.215.218	10.2.215.219
120	10.2.215.220/30	10.2.215.221 – 10.2.215.222	10.2.215.223
121	10.2.215.224/30	10.2.215.225 – 10.2.215.226	10.2.215.227
122	10.2.215.228/30	10.2.215.229 – 10.2.215.230	10.2.215.231
123	10.2.215.232/30	10.2.215.233 – 10.2.215.234	10.2.215.235
124	10.2.215.236/30	10.2.215.237 – 10.2.215.238	10.2.215.239
125	10.2.215.240/30	10.2.215.241 – 10.2.215.242	10.2.215.243
126	10.2.215.244/30	10.2.215.245 – 10.2.215.246	10.2.215.247
127	10.2.215.248/30	10.2.215.249 – 10.2.215.250	10.2.215.251
128	10.2.215.252/30	10.2.215.253 – 10.2.215.254	10.2.215.255

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 →