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)10.2.114.0/23

network10.2.114.0/23

broadcast10.2.115.255

first host10.2.114.1

last host10.2.115.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.114.0/23

address00001010.00000010.01110010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.01110010.00000000

broadcast00001010.00000010.01110011.11111111

green = network part, grey = host part

hex0x0a027200

decimal167932416

reverse dns0.114.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:7200

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.114.0/30	10.2.114.1 – 10.2.114.2	10.2.114.3
2	10.2.114.4/30	10.2.114.5 – 10.2.114.6	10.2.114.7
3	10.2.114.8/30	10.2.114.9 – 10.2.114.10	10.2.114.11
4	10.2.114.12/30	10.2.114.13 – 10.2.114.14	10.2.114.15
5	10.2.114.16/30	10.2.114.17 – 10.2.114.18	10.2.114.19
6	10.2.114.20/30	10.2.114.21 – 10.2.114.22	10.2.114.23
7	10.2.114.24/30	10.2.114.25 – 10.2.114.26	10.2.114.27
8	10.2.114.28/30	10.2.114.29 – 10.2.114.30	10.2.114.31
9	10.2.114.32/30	10.2.114.33 – 10.2.114.34	10.2.114.35
10	10.2.114.36/30	10.2.114.37 – 10.2.114.38	10.2.114.39
11	10.2.114.40/30	10.2.114.41 – 10.2.114.42	10.2.114.43
12	10.2.114.44/30	10.2.114.45 – 10.2.114.46	10.2.114.47
13	10.2.114.48/30	10.2.114.49 – 10.2.114.50	10.2.114.51
14	10.2.114.52/30	10.2.114.53 – 10.2.114.54	10.2.114.55
15	10.2.114.56/30	10.2.114.57 – 10.2.114.58	10.2.114.59
16	10.2.114.60/30	10.2.114.61 – 10.2.114.62	10.2.114.63
17	10.2.114.64/30	10.2.114.65 – 10.2.114.66	10.2.114.67
18	10.2.114.68/30	10.2.114.69 – 10.2.114.70	10.2.114.71
19	10.2.114.72/30	10.2.114.73 – 10.2.114.74	10.2.114.75
20	10.2.114.76/30	10.2.114.77 – 10.2.114.78	10.2.114.79
21	10.2.114.80/30	10.2.114.81 – 10.2.114.82	10.2.114.83
22	10.2.114.84/30	10.2.114.85 – 10.2.114.86	10.2.114.87
23	10.2.114.88/30	10.2.114.89 – 10.2.114.90	10.2.114.91
24	10.2.114.92/30	10.2.114.93 – 10.2.114.94	10.2.114.95
25	10.2.114.96/30	10.2.114.97 – 10.2.114.98	10.2.114.99
26	10.2.114.100/30	10.2.114.101 – 10.2.114.102	10.2.114.103
27	10.2.114.104/30	10.2.114.105 – 10.2.114.106	10.2.114.107
28	10.2.114.108/30	10.2.114.109 – 10.2.114.110	10.2.114.111
29	10.2.114.112/30	10.2.114.113 – 10.2.114.114	10.2.114.115
30	10.2.114.116/30	10.2.114.117 – 10.2.114.118	10.2.114.119
31	10.2.114.120/30	10.2.114.121 – 10.2.114.122	10.2.114.123
32	10.2.114.124/30	10.2.114.125 – 10.2.114.126	10.2.114.127
33	10.2.114.128/30	10.2.114.129 – 10.2.114.130	10.2.114.131
34	10.2.114.132/30	10.2.114.133 – 10.2.114.134	10.2.114.135
35	10.2.114.136/30	10.2.114.137 – 10.2.114.138	10.2.114.139
36	10.2.114.140/30	10.2.114.141 – 10.2.114.142	10.2.114.143
37	10.2.114.144/30	10.2.114.145 – 10.2.114.146	10.2.114.147
38	10.2.114.148/30	10.2.114.149 – 10.2.114.150	10.2.114.151
39	10.2.114.152/30	10.2.114.153 – 10.2.114.154	10.2.114.155
40	10.2.114.156/30	10.2.114.157 – 10.2.114.158	10.2.114.159
41	10.2.114.160/30	10.2.114.161 – 10.2.114.162	10.2.114.163
42	10.2.114.164/30	10.2.114.165 – 10.2.114.166	10.2.114.167
43	10.2.114.168/30	10.2.114.169 – 10.2.114.170	10.2.114.171
44	10.2.114.172/30	10.2.114.173 – 10.2.114.174	10.2.114.175
45	10.2.114.176/30	10.2.114.177 – 10.2.114.178	10.2.114.179
46	10.2.114.180/30	10.2.114.181 – 10.2.114.182	10.2.114.183
47	10.2.114.184/30	10.2.114.185 – 10.2.114.186	10.2.114.187
48	10.2.114.188/30	10.2.114.189 – 10.2.114.190	10.2.114.191
49	10.2.114.192/30	10.2.114.193 – 10.2.114.194	10.2.114.195
50	10.2.114.196/30	10.2.114.197 – 10.2.114.198	10.2.114.199
51	10.2.114.200/30	10.2.114.201 – 10.2.114.202	10.2.114.203
52	10.2.114.204/30	10.2.114.205 – 10.2.114.206	10.2.114.207
53	10.2.114.208/30	10.2.114.209 – 10.2.114.210	10.2.114.211
54	10.2.114.212/30	10.2.114.213 – 10.2.114.214	10.2.114.215
55	10.2.114.216/30	10.2.114.217 – 10.2.114.218	10.2.114.219
56	10.2.114.220/30	10.2.114.221 – 10.2.114.222	10.2.114.223
57	10.2.114.224/30	10.2.114.225 – 10.2.114.226	10.2.114.227
58	10.2.114.228/30	10.2.114.229 – 10.2.114.230	10.2.114.231
59	10.2.114.232/30	10.2.114.233 – 10.2.114.234	10.2.114.235
60	10.2.114.236/30	10.2.114.237 – 10.2.114.238	10.2.114.239
61	10.2.114.240/30	10.2.114.241 – 10.2.114.242	10.2.114.243
62	10.2.114.244/30	10.2.114.245 – 10.2.114.246	10.2.114.247
63	10.2.114.248/30	10.2.114.249 – 10.2.114.250	10.2.114.251
64	10.2.114.252/30	10.2.114.253 – 10.2.114.254	10.2.114.255
65	10.2.115.0/30	10.2.115.1 – 10.2.115.2	10.2.115.3
66	10.2.115.4/30	10.2.115.5 – 10.2.115.6	10.2.115.7
67	10.2.115.8/30	10.2.115.9 – 10.2.115.10	10.2.115.11
68	10.2.115.12/30	10.2.115.13 – 10.2.115.14	10.2.115.15
69	10.2.115.16/30	10.2.115.17 – 10.2.115.18	10.2.115.19
70	10.2.115.20/30	10.2.115.21 – 10.2.115.22	10.2.115.23
71	10.2.115.24/30	10.2.115.25 – 10.2.115.26	10.2.115.27
72	10.2.115.28/30	10.2.115.29 – 10.2.115.30	10.2.115.31
73	10.2.115.32/30	10.2.115.33 – 10.2.115.34	10.2.115.35
74	10.2.115.36/30	10.2.115.37 – 10.2.115.38	10.2.115.39
75	10.2.115.40/30	10.2.115.41 – 10.2.115.42	10.2.115.43
76	10.2.115.44/30	10.2.115.45 – 10.2.115.46	10.2.115.47
77	10.2.115.48/30	10.2.115.49 – 10.2.115.50	10.2.115.51
78	10.2.115.52/30	10.2.115.53 – 10.2.115.54	10.2.115.55
79	10.2.115.56/30	10.2.115.57 – 10.2.115.58	10.2.115.59
80	10.2.115.60/30	10.2.115.61 – 10.2.115.62	10.2.115.63
81	10.2.115.64/30	10.2.115.65 – 10.2.115.66	10.2.115.67
82	10.2.115.68/30	10.2.115.69 – 10.2.115.70	10.2.115.71
83	10.2.115.72/30	10.2.115.73 – 10.2.115.74	10.2.115.75
84	10.2.115.76/30	10.2.115.77 – 10.2.115.78	10.2.115.79
85	10.2.115.80/30	10.2.115.81 – 10.2.115.82	10.2.115.83
86	10.2.115.84/30	10.2.115.85 – 10.2.115.86	10.2.115.87
87	10.2.115.88/30	10.2.115.89 – 10.2.115.90	10.2.115.91
88	10.2.115.92/30	10.2.115.93 – 10.2.115.94	10.2.115.95
89	10.2.115.96/30	10.2.115.97 – 10.2.115.98	10.2.115.99
90	10.2.115.100/30	10.2.115.101 – 10.2.115.102	10.2.115.103
91	10.2.115.104/30	10.2.115.105 – 10.2.115.106	10.2.115.107
92	10.2.115.108/30	10.2.115.109 – 10.2.115.110	10.2.115.111
93	10.2.115.112/30	10.2.115.113 – 10.2.115.114	10.2.115.115
94	10.2.115.116/30	10.2.115.117 – 10.2.115.118	10.2.115.119
95	10.2.115.120/30	10.2.115.121 – 10.2.115.122	10.2.115.123
96	10.2.115.124/30	10.2.115.125 – 10.2.115.126	10.2.115.127
97	10.2.115.128/30	10.2.115.129 – 10.2.115.130	10.2.115.131
98	10.2.115.132/30	10.2.115.133 – 10.2.115.134	10.2.115.135
99	10.2.115.136/30	10.2.115.137 – 10.2.115.138	10.2.115.139
100	10.2.115.140/30	10.2.115.141 – 10.2.115.142	10.2.115.143
101	10.2.115.144/30	10.2.115.145 – 10.2.115.146	10.2.115.147
102	10.2.115.148/30	10.2.115.149 – 10.2.115.150	10.2.115.151
103	10.2.115.152/30	10.2.115.153 – 10.2.115.154	10.2.115.155
104	10.2.115.156/30	10.2.115.157 – 10.2.115.158	10.2.115.159
105	10.2.115.160/30	10.2.115.161 – 10.2.115.162	10.2.115.163
106	10.2.115.164/30	10.2.115.165 – 10.2.115.166	10.2.115.167
107	10.2.115.168/30	10.2.115.169 – 10.2.115.170	10.2.115.171
108	10.2.115.172/30	10.2.115.173 – 10.2.115.174	10.2.115.175
109	10.2.115.176/30	10.2.115.177 – 10.2.115.178	10.2.115.179
110	10.2.115.180/30	10.2.115.181 – 10.2.115.182	10.2.115.183
111	10.2.115.184/30	10.2.115.185 – 10.2.115.186	10.2.115.187
112	10.2.115.188/30	10.2.115.189 – 10.2.115.190	10.2.115.191
113	10.2.115.192/30	10.2.115.193 – 10.2.115.194	10.2.115.195
114	10.2.115.196/30	10.2.115.197 – 10.2.115.198	10.2.115.199
115	10.2.115.200/30	10.2.115.201 – 10.2.115.202	10.2.115.203
116	10.2.115.204/30	10.2.115.205 – 10.2.115.206	10.2.115.207
117	10.2.115.208/30	10.2.115.209 – 10.2.115.210	10.2.115.211
118	10.2.115.212/30	10.2.115.213 – 10.2.115.214	10.2.115.215
119	10.2.115.216/30	10.2.115.217 – 10.2.115.218	10.2.115.219
120	10.2.115.220/30	10.2.115.221 – 10.2.115.222	10.2.115.223
121	10.2.115.224/30	10.2.115.225 – 10.2.115.226	10.2.115.227
122	10.2.115.228/30	10.2.115.229 – 10.2.115.230	10.2.115.231
123	10.2.115.232/30	10.2.115.233 – 10.2.115.234	10.2.115.235
124	10.2.115.236/30	10.2.115.237 – 10.2.115.238	10.2.115.239
125	10.2.115.240/30	10.2.115.241 – 10.2.115.242	10.2.115.243
126	10.2.115.244/30	10.2.115.245 – 10.2.115.246	10.2.115.247
127	10.2.115.248/30	10.2.115.249 – 10.2.115.250	10.2.115.251
128	10.2.115.252/30	10.2.115.253 – 10.2.115.254	10.2.115.255

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 →