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)10.2.96.0/23

network10.2.96.0/23

broadcast10.2.97.255

first host10.2.96.1

last host10.2.97.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.96.0/23

address00001010.00000010.01100000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.01100000.00000000

broadcast00001010.00000010.01100001.11111111

green = network part, grey = host part

hex0x0a026000

decimal167927808

reverse dns0.96.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:6000

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.96.0/30	10.2.96.1 – 10.2.96.2	10.2.96.3
2	10.2.96.4/30	10.2.96.5 – 10.2.96.6	10.2.96.7
3	10.2.96.8/30	10.2.96.9 – 10.2.96.10	10.2.96.11
4	10.2.96.12/30	10.2.96.13 – 10.2.96.14	10.2.96.15
5	10.2.96.16/30	10.2.96.17 – 10.2.96.18	10.2.96.19
6	10.2.96.20/30	10.2.96.21 – 10.2.96.22	10.2.96.23
7	10.2.96.24/30	10.2.96.25 – 10.2.96.26	10.2.96.27
8	10.2.96.28/30	10.2.96.29 – 10.2.96.30	10.2.96.31
9	10.2.96.32/30	10.2.96.33 – 10.2.96.34	10.2.96.35
10	10.2.96.36/30	10.2.96.37 – 10.2.96.38	10.2.96.39
11	10.2.96.40/30	10.2.96.41 – 10.2.96.42	10.2.96.43
12	10.2.96.44/30	10.2.96.45 – 10.2.96.46	10.2.96.47
13	10.2.96.48/30	10.2.96.49 – 10.2.96.50	10.2.96.51
14	10.2.96.52/30	10.2.96.53 – 10.2.96.54	10.2.96.55
15	10.2.96.56/30	10.2.96.57 – 10.2.96.58	10.2.96.59
16	10.2.96.60/30	10.2.96.61 – 10.2.96.62	10.2.96.63
17	10.2.96.64/30	10.2.96.65 – 10.2.96.66	10.2.96.67
18	10.2.96.68/30	10.2.96.69 – 10.2.96.70	10.2.96.71
19	10.2.96.72/30	10.2.96.73 – 10.2.96.74	10.2.96.75
20	10.2.96.76/30	10.2.96.77 – 10.2.96.78	10.2.96.79
21	10.2.96.80/30	10.2.96.81 – 10.2.96.82	10.2.96.83
22	10.2.96.84/30	10.2.96.85 – 10.2.96.86	10.2.96.87
23	10.2.96.88/30	10.2.96.89 – 10.2.96.90	10.2.96.91
24	10.2.96.92/30	10.2.96.93 – 10.2.96.94	10.2.96.95
25	10.2.96.96/30	10.2.96.97 – 10.2.96.98	10.2.96.99
26	10.2.96.100/30	10.2.96.101 – 10.2.96.102	10.2.96.103
27	10.2.96.104/30	10.2.96.105 – 10.2.96.106	10.2.96.107
28	10.2.96.108/30	10.2.96.109 – 10.2.96.110	10.2.96.111
29	10.2.96.112/30	10.2.96.113 – 10.2.96.114	10.2.96.115
30	10.2.96.116/30	10.2.96.117 – 10.2.96.118	10.2.96.119
31	10.2.96.120/30	10.2.96.121 – 10.2.96.122	10.2.96.123
32	10.2.96.124/30	10.2.96.125 – 10.2.96.126	10.2.96.127
33	10.2.96.128/30	10.2.96.129 – 10.2.96.130	10.2.96.131
34	10.2.96.132/30	10.2.96.133 – 10.2.96.134	10.2.96.135
35	10.2.96.136/30	10.2.96.137 – 10.2.96.138	10.2.96.139
36	10.2.96.140/30	10.2.96.141 – 10.2.96.142	10.2.96.143
37	10.2.96.144/30	10.2.96.145 – 10.2.96.146	10.2.96.147
38	10.2.96.148/30	10.2.96.149 – 10.2.96.150	10.2.96.151
39	10.2.96.152/30	10.2.96.153 – 10.2.96.154	10.2.96.155
40	10.2.96.156/30	10.2.96.157 – 10.2.96.158	10.2.96.159
41	10.2.96.160/30	10.2.96.161 – 10.2.96.162	10.2.96.163
42	10.2.96.164/30	10.2.96.165 – 10.2.96.166	10.2.96.167
43	10.2.96.168/30	10.2.96.169 – 10.2.96.170	10.2.96.171
44	10.2.96.172/30	10.2.96.173 – 10.2.96.174	10.2.96.175
45	10.2.96.176/30	10.2.96.177 – 10.2.96.178	10.2.96.179
46	10.2.96.180/30	10.2.96.181 – 10.2.96.182	10.2.96.183
47	10.2.96.184/30	10.2.96.185 – 10.2.96.186	10.2.96.187
48	10.2.96.188/30	10.2.96.189 – 10.2.96.190	10.2.96.191
49	10.2.96.192/30	10.2.96.193 – 10.2.96.194	10.2.96.195
50	10.2.96.196/30	10.2.96.197 – 10.2.96.198	10.2.96.199
51	10.2.96.200/30	10.2.96.201 – 10.2.96.202	10.2.96.203
52	10.2.96.204/30	10.2.96.205 – 10.2.96.206	10.2.96.207
53	10.2.96.208/30	10.2.96.209 – 10.2.96.210	10.2.96.211
54	10.2.96.212/30	10.2.96.213 – 10.2.96.214	10.2.96.215
55	10.2.96.216/30	10.2.96.217 – 10.2.96.218	10.2.96.219
56	10.2.96.220/30	10.2.96.221 – 10.2.96.222	10.2.96.223
57	10.2.96.224/30	10.2.96.225 – 10.2.96.226	10.2.96.227
58	10.2.96.228/30	10.2.96.229 – 10.2.96.230	10.2.96.231
59	10.2.96.232/30	10.2.96.233 – 10.2.96.234	10.2.96.235
60	10.2.96.236/30	10.2.96.237 – 10.2.96.238	10.2.96.239
61	10.2.96.240/30	10.2.96.241 – 10.2.96.242	10.2.96.243
62	10.2.96.244/30	10.2.96.245 – 10.2.96.246	10.2.96.247
63	10.2.96.248/30	10.2.96.249 – 10.2.96.250	10.2.96.251
64	10.2.96.252/30	10.2.96.253 – 10.2.96.254	10.2.96.255
65	10.2.97.0/30	10.2.97.1 – 10.2.97.2	10.2.97.3
66	10.2.97.4/30	10.2.97.5 – 10.2.97.6	10.2.97.7
67	10.2.97.8/30	10.2.97.9 – 10.2.97.10	10.2.97.11
68	10.2.97.12/30	10.2.97.13 – 10.2.97.14	10.2.97.15
69	10.2.97.16/30	10.2.97.17 – 10.2.97.18	10.2.97.19
70	10.2.97.20/30	10.2.97.21 – 10.2.97.22	10.2.97.23
71	10.2.97.24/30	10.2.97.25 – 10.2.97.26	10.2.97.27
72	10.2.97.28/30	10.2.97.29 – 10.2.97.30	10.2.97.31
73	10.2.97.32/30	10.2.97.33 – 10.2.97.34	10.2.97.35
74	10.2.97.36/30	10.2.97.37 – 10.2.97.38	10.2.97.39
75	10.2.97.40/30	10.2.97.41 – 10.2.97.42	10.2.97.43
76	10.2.97.44/30	10.2.97.45 – 10.2.97.46	10.2.97.47
77	10.2.97.48/30	10.2.97.49 – 10.2.97.50	10.2.97.51
78	10.2.97.52/30	10.2.97.53 – 10.2.97.54	10.2.97.55
79	10.2.97.56/30	10.2.97.57 – 10.2.97.58	10.2.97.59
80	10.2.97.60/30	10.2.97.61 – 10.2.97.62	10.2.97.63
81	10.2.97.64/30	10.2.97.65 – 10.2.97.66	10.2.97.67
82	10.2.97.68/30	10.2.97.69 – 10.2.97.70	10.2.97.71
83	10.2.97.72/30	10.2.97.73 – 10.2.97.74	10.2.97.75
84	10.2.97.76/30	10.2.97.77 – 10.2.97.78	10.2.97.79
85	10.2.97.80/30	10.2.97.81 – 10.2.97.82	10.2.97.83
86	10.2.97.84/30	10.2.97.85 – 10.2.97.86	10.2.97.87
87	10.2.97.88/30	10.2.97.89 – 10.2.97.90	10.2.97.91
88	10.2.97.92/30	10.2.97.93 – 10.2.97.94	10.2.97.95
89	10.2.97.96/30	10.2.97.97 – 10.2.97.98	10.2.97.99
90	10.2.97.100/30	10.2.97.101 – 10.2.97.102	10.2.97.103
91	10.2.97.104/30	10.2.97.105 – 10.2.97.106	10.2.97.107
92	10.2.97.108/30	10.2.97.109 – 10.2.97.110	10.2.97.111
93	10.2.97.112/30	10.2.97.113 – 10.2.97.114	10.2.97.115
94	10.2.97.116/30	10.2.97.117 – 10.2.97.118	10.2.97.119
95	10.2.97.120/30	10.2.97.121 – 10.2.97.122	10.2.97.123
96	10.2.97.124/30	10.2.97.125 – 10.2.97.126	10.2.97.127
97	10.2.97.128/30	10.2.97.129 – 10.2.97.130	10.2.97.131
98	10.2.97.132/30	10.2.97.133 – 10.2.97.134	10.2.97.135
99	10.2.97.136/30	10.2.97.137 – 10.2.97.138	10.2.97.139
100	10.2.97.140/30	10.2.97.141 – 10.2.97.142	10.2.97.143
101	10.2.97.144/30	10.2.97.145 – 10.2.97.146	10.2.97.147
102	10.2.97.148/30	10.2.97.149 – 10.2.97.150	10.2.97.151
103	10.2.97.152/30	10.2.97.153 – 10.2.97.154	10.2.97.155
104	10.2.97.156/30	10.2.97.157 – 10.2.97.158	10.2.97.159
105	10.2.97.160/30	10.2.97.161 – 10.2.97.162	10.2.97.163
106	10.2.97.164/30	10.2.97.165 – 10.2.97.166	10.2.97.167
107	10.2.97.168/30	10.2.97.169 – 10.2.97.170	10.2.97.171
108	10.2.97.172/30	10.2.97.173 – 10.2.97.174	10.2.97.175
109	10.2.97.176/30	10.2.97.177 – 10.2.97.178	10.2.97.179
110	10.2.97.180/30	10.2.97.181 – 10.2.97.182	10.2.97.183
111	10.2.97.184/30	10.2.97.185 – 10.2.97.186	10.2.97.187
112	10.2.97.188/30	10.2.97.189 – 10.2.97.190	10.2.97.191
113	10.2.97.192/30	10.2.97.193 – 10.2.97.194	10.2.97.195
114	10.2.97.196/30	10.2.97.197 – 10.2.97.198	10.2.97.199
115	10.2.97.200/30	10.2.97.201 – 10.2.97.202	10.2.97.203
116	10.2.97.204/30	10.2.97.205 – 10.2.97.206	10.2.97.207
117	10.2.97.208/30	10.2.97.209 – 10.2.97.210	10.2.97.211
118	10.2.97.212/30	10.2.97.213 – 10.2.97.214	10.2.97.215
119	10.2.97.216/30	10.2.97.217 – 10.2.97.218	10.2.97.219
120	10.2.97.220/30	10.2.97.221 – 10.2.97.222	10.2.97.223
121	10.2.97.224/30	10.2.97.225 – 10.2.97.226	10.2.97.227
122	10.2.97.228/30	10.2.97.229 – 10.2.97.230	10.2.97.231
123	10.2.97.232/30	10.2.97.233 – 10.2.97.234	10.2.97.235
124	10.2.97.236/30	10.2.97.237 – 10.2.97.238	10.2.97.239
125	10.2.97.240/30	10.2.97.241 – 10.2.97.242	10.2.97.243
126	10.2.97.244/30	10.2.97.245 – 10.2.97.246	10.2.97.247
127	10.2.97.248/30	10.2.97.249 – 10.2.97.250	10.2.97.251
128	10.2.97.252/30	10.2.97.253 – 10.2.97.254	10.2.97.255

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 →