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)10.2.160.0/23

network10.2.160.0/23

broadcast10.2.161.255

first host10.2.160.1

last host10.2.161.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.160.0/23

address00001010.00000010.10100000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.10100000.00000000

broadcast00001010.00000010.10100001.11111111

green = network part, grey = host part

hex0x0a02a000

decimal167944192

reverse dns0.160.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a000

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.160.0/30	10.2.160.1 – 10.2.160.2	10.2.160.3
2	10.2.160.4/30	10.2.160.5 – 10.2.160.6	10.2.160.7
3	10.2.160.8/30	10.2.160.9 – 10.2.160.10	10.2.160.11
4	10.2.160.12/30	10.2.160.13 – 10.2.160.14	10.2.160.15
5	10.2.160.16/30	10.2.160.17 – 10.2.160.18	10.2.160.19
6	10.2.160.20/30	10.2.160.21 – 10.2.160.22	10.2.160.23
7	10.2.160.24/30	10.2.160.25 – 10.2.160.26	10.2.160.27
8	10.2.160.28/30	10.2.160.29 – 10.2.160.30	10.2.160.31
9	10.2.160.32/30	10.2.160.33 – 10.2.160.34	10.2.160.35
10	10.2.160.36/30	10.2.160.37 – 10.2.160.38	10.2.160.39
11	10.2.160.40/30	10.2.160.41 – 10.2.160.42	10.2.160.43
12	10.2.160.44/30	10.2.160.45 – 10.2.160.46	10.2.160.47
13	10.2.160.48/30	10.2.160.49 – 10.2.160.50	10.2.160.51
14	10.2.160.52/30	10.2.160.53 – 10.2.160.54	10.2.160.55
15	10.2.160.56/30	10.2.160.57 – 10.2.160.58	10.2.160.59
16	10.2.160.60/30	10.2.160.61 – 10.2.160.62	10.2.160.63
17	10.2.160.64/30	10.2.160.65 – 10.2.160.66	10.2.160.67
18	10.2.160.68/30	10.2.160.69 – 10.2.160.70	10.2.160.71
19	10.2.160.72/30	10.2.160.73 – 10.2.160.74	10.2.160.75
20	10.2.160.76/30	10.2.160.77 – 10.2.160.78	10.2.160.79
21	10.2.160.80/30	10.2.160.81 – 10.2.160.82	10.2.160.83
22	10.2.160.84/30	10.2.160.85 – 10.2.160.86	10.2.160.87
23	10.2.160.88/30	10.2.160.89 – 10.2.160.90	10.2.160.91
24	10.2.160.92/30	10.2.160.93 – 10.2.160.94	10.2.160.95
25	10.2.160.96/30	10.2.160.97 – 10.2.160.98	10.2.160.99
26	10.2.160.100/30	10.2.160.101 – 10.2.160.102	10.2.160.103
27	10.2.160.104/30	10.2.160.105 – 10.2.160.106	10.2.160.107
28	10.2.160.108/30	10.2.160.109 – 10.2.160.110	10.2.160.111
29	10.2.160.112/30	10.2.160.113 – 10.2.160.114	10.2.160.115
30	10.2.160.116/30	10.2.160.117 – 10.2.160.118	10.2.160.119
31	10.2.160.120/30	10.2.160.121 – 10.2.160.122	10.2.160.123
32	10.2.160.124/30	10.2.160.125 – 10.2.160.126	10.2.160.127
33	10.2.160.128/30	10.2.160.129 – 10.2.160.130	10.2.160.131
34	10.2.160.132/30	10.2.160.133 – 10.2.160.134	10.2.160.135
35	10.2.160.136/30	10.2.160.137 – 10.2.160.138	10.2.160.139
36	10.2.160.140/30	10.2.160.141 – 10.2.160.142	10.2.160.143
37	10.2.160.144/30	10.2.160.145 – 10.2.160.146	10.2.160.147
38	10.2.160.148/30	10.2.160.149 – 10.2.160.150	10.2.160.151
39	10.2.160.152/30	10.2.160.153 – 10.2.160.154	10.2.160.155
40	10.2.160.156/30	10.2.160.157 – 10.2.160.158	10.2.160.159
41	10.2.160.160/30	10.2.160.161 – 10.2.160.162	10.2.160.163
42	10.2.160.164/30	10.2.160.165 – 10.2.160.166	10.2.160.167
43	10.2.160.168/30	10.2.160.169 – 10.2.160.170	10.2.160.171
44	10.2.160.172/30	10.2.160.173 – 10.2.160.174	10.2.160.175
45	10.2.160.176/30	10.2.160.177 – 10.2.160.178	10.2.160.179
46	10.2.160.180/30	10.2.160.181 – 10.2.160.182	10.2.160.183
47	10.2.160.184/30	10.2.160.185 – 10.2.160.186	10.2.160.187
48	10.2.160.188/30	10.2.160.189 – 10.2.160.190	10.2.160.191
49	10.2.160.192/30	10.2.160.193 – 10.2.160.194	10.2.160.195
50	10.2.160.196/30	10.2.160.197 – 10.2.160.198	10.2.160.199
51	10.2.160.200/30	10.2.160.201 – 10.2.160.202	10.2.160.203
52	10.2.160.204/30	10.2.160.205 – 10.2.160.206	10.2.160.207
53	10.2.160.208/30	10.2.160.209 – 10.2.160.210	10.2.160.211
54	10.2.160.212/30	10.2.160.213 – 10.2.160.214	10.2.160.215
55	10.2.160.216/30	10.2.160.217 – 10.2.160.218	10.2.160.219
56	10.2.160.220/30	10.2.160.221 – 10.2.160.222	10.2.160.223
57	10.2.160.224/30	10.2.160.225 – 10.2.160.226	10.2.160.227
58	10.2.160.228/30	10.2.160.229 – 10.2.160.230	10.2.160.231
59	10.2.160.232/30	10.2.160.233 – 10.2.160.234	10.2.160.235
60	10.2.160.236/30	10.2.160.237 – 10.2.160.238	10.2.160.239
61	10.2.160.240/30	10.2.160.241 – 10.2.160.242	10.2.160.243
62	10.2.160.244/30	10.2.160.245 – 10.2.160.246	10.2.160.247
63	10.2.160.248/30	10.2.160.249 – 10.2.160.250	10.2.160.251
64	10.2.160.252/30	10.2.160.253 – 10.2.160.254	10.2.160.255
65	10.2.161.0/30	10.2.161.1 – 10.2.161.2	10.2.161.3
66	10.2.161.4/30	10.2.161.5 – 10.2.161.6	10.2.161.7
67	10.2.161.8/30	10.2.161.9 – 10.2.161.10	10.2.161.11
68	10.2.161.12/30	10.2.161.13 – 10.2.161.14	10.2.161.15
69	10.2.161.16/30	10.2.161.17 – 10.2.161.18	10.2.161.19
70	10.2.161.20/30	10.2.161.21 – 10.2.161.22	10.2.161.23
71	10.2.161.24/30	10.2.161.25 – 10.2.161.26	10.2.161.27
72	10.2.161.28/30	10.2.161.29 – 10.2.161.30	10.2.161.31
73	10.2.161.32/30	10.2.161.33 – 10.2.161.34	10.2.161.35
74	10.2.161.36/30	10.2.161.37 – 10.2.161.38	10.2.161.39
75	10.2.161.40/30	10.2.161.41 – 10.2.161.42	10.2.161.43
76	10.2.161.44/30	10.2.161.45 – 10.2.161.46	10.2.161.47
77	10.2.161.48/30	10.2.161.49 – 10.2.161.50	10.2.161.51
78	10.2.161.52/30	10.2.161.53 – 10.2.161.54	10.2.161.55
79	10.2.161.56/30	10.2.161.57 – 10.2.161.58	10.2.161.59
80	10.2.161.60/30	10.2.161.61 – 10.2.161.62	10.2.161.63
81	10.2.161.64/30	10.2.161.65 – 10.2.161.66	10.2.161.67
82	10.2.161.68/30	10.2.161.69 – 10.2.161.70	10.2.161.71
83	10.2.161.72/30	10.2.161.73 – 10.2.161.74	10.2.161.75
84	10.2.161.76/30	10.2.161.77 – 10.2.161.78	10.2.161.79
85	10.2.161.80/30	10.2.161.81 – 10.2.161.82	10.2.161.83
86	10.2.161.84/30	10.2.161.85 – 10.2.161.86	10.2.161.87
87	10.2.161.88/30	10.2.161.89 – 10.2.161.90	10.2.161.91
88	10.2.161.92/30	10.2.161.93 – 10.2.161.94	10.2.161.95
89	10.2.161.96/30	10.2.161.97 – 10.2.161.98	10.2.161.99
90	10.2.161.100/30	10.2.161.101 – 10.2.161.102	10.2.161.103
91	10.2.161.104/30	10.2.161.105 – 10.2.161.106	10.2.161.107
92	10.2.161.108/30	10.2.161.109 – 10.2.161.110	10.2.161.111
93	10.2.161.112/30	10.2.161.113 – 10.2.161.114	10.2.161.115
94	10.2.161.116/30	10.2.161.117 – 10.2.161.118	10.2.161.119
95	10.2.161.120/30	10.2.161.121 – 10.2.161.122	10.2.161.123
96	10.2.161.124/30	10.2.161.125 – 10.2.161.126	10.2.161.127
97	10.2.161.128/30	10.2.161.129 – 10.2.161.130	10.2.161.131
98	10.2.161.132/30	10.2.161.133 – 10.2.161.134	10.2.161.135
99	10.2.161.136/30	10.2.161.137 – 10.2.161.138	10.2.161.139
100	10.2.161.140/30	10.2.161.141 – 10.2.161.142	10.2.161.143
101	10.2.161.144/30	10.2.161.145 – 10.2.161.146	10.2.161.147
102	10.2.161.148/30	10.2.161.149 – 10.2.161.150	10.2.161.151
103	10.2.161.152/30	10.2.161.153 – 10.2.161.154	10.2.161.155
104	10.2.161.156/30	10.2.161.157 – 10.2.161.158	10.2.161.159
105	10.2.161.160/30	10.2.161.161 – 10.2.161.162	10.2.161.163
106	10.2.161.164/30	10.2.161.165 – 10.2.161.166	10.2.161.167
107	10.2.161.168/30	10.2.161.169 – 10.2.161.170	10.2.161.171
108	10.2.161.172/30	10.2.161.173 – 10.2.161.174	10.2.161.175
109	10.2.161.176/30	10.2.161.177 – 10.2.161.178	10.2.161.179
110	10.2.161.180/30	10.2.161.181 – 10.2.161.182	10.2.161.183
111	10.2.161.184/30	10.2.161.185 – 10.2.161.186	10.2.161.187
112	10.2.161.188/30	10.2.161.189 – 10.2.161.190	10.2.161.191
113	10.2.161.192/30	10.2.161.193 – 10.2.161.194	10.2.161.195
114	10.2.161.196/30	10.2.161.197 – 10.2.161.198	10.2.161.199
115	10.2.161.200/30	10.2.161.201 – 10.2.161.202	10.2.161.203
116	10.2.161.204/30	10.2.161.205 – 10.2.161.206	10.2.161.207
117	10.2.161.208/30	10.2.161.209 – 10.2.161.210	10.2.161.211
118	10.2.161.212/30	10.2.161.213 – 10.2.161.214	10.2.161.215
119	10.2.161.216/30	10.2.161.217 – 10.2.161.218	10.2.161.219
120	10.2.161.220/30	10.2.161.221 – 10.2.161.222	10.2.161.223
121	10.2.161.224/30	10.2.161.225 – 10.2.161.226	10.2.161.227
122	10.2.161.228/30	10.2.161.229 – 10.2.161.230	10.2.161.231
123	10.2.161.232/30	10.2.161.233 – 10.2.161.234	10.2.161.235
124	10.2.161.236/30	10.2.161.237 – 10.2.161.238	10.2.161.239
125	10.2.161.240/30	10.2.161.241 – 10.2.161.242	10.2.161.243
126	10.2.161.244/30	10.2.161.245 – 10.2.161.246	10.2.161.247
127	10.2.161.248/30	10.2.161.249 – 10.2.161.250	10.2.161.251
128	10.2.161.252/30	10.2.161.253 – 10.2.161.254	10.2.161.255

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 →