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)10.3.228.0/23

network10.3.228.0/23

broadcast10.3.229.255

first host10.3.228.1

last host10.3.229.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.228.0/23

address00001010.00000011.11100100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.11100100.00000000

broadcast00001010.00000011.11100101.11111111

green = network part, grey = host part

hex0x0a03e400

decimal168027136

reverse dns0.228.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:e400

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.228.0/30	10.3.228.1 – 10.3.228.2	10.3.228.3
2	10.3.228.4/30	10.3.228.5 – 10.3.228.6	10.3.228.7
3	10.3.228.8/30	10.3.228.9 – 10.3.228.10	10.3.228.11
4	10.3.228.12/30	10.3.228.13 – 10.3.228.14	10.3.228.15
5	10.3.228.16/30	10.3.228.17 – 10.3.228.18	10.3.228.19
6	10.3.228.20/30	10.3.228.21 – 10.3.228.22	10.3.228.23
7	10.3.228.24/30	10.3.228.25 – 10.3.228.26	10.3.228.27
8	10.3.228.28/30	10.3.228.29 – 10.3.228.30	10.3.228.31
9	10.3.228.32/30	10.3.228.33 – 10.3.228.34	10.3.228.35
10	10.3.228.36/30	10.3.228.37 – 10.3.228.38	10.3.228.39
11	10.3.228.40/30	10.3.228.41 – 10.3.228.42	10.3.228.43
12	10.3.228.44/30	10.3.228.45 – 10.3.228.46	10.3.228.47
13	10.3.228.48/30	10.3.228.49 – 10.3.228.50	10.3.228.51
14	10.3.228.52/30	10.3.228.53 – 10.3.228.54	10.3.228.55
15	10.3.228.56/30	10.3.228.57 – 10.3.228.58	10.3.228.59
16	10.3.228.60/30	10.3.228.61 – 10.3.228.62	10.3.228.63
17	10.3.228.64/30	10.3.228.65 – 10.3.228.66	10.3.228.67
18	10.3.228.68/30	10.3.228.69 – 10.3.228.70	10.3.228.71
19	10.3.228.72/30	10.3.228.73 – 10.3.228.74	10.3.228.75
20	10.3.228.76/30	10.3.228.77 – 10.3.228.78	10.3.228.79
21	10.3.228.80/30	10.3.228.81 – 10.3.228.82	10.3.228.83
22	10.3.228.84/30	10.3.228.85 – 10.3.228.86	10.3.228.87
23	10.3.228.88/30	10.3.228.89 – 10.3.228.90	10.3.228.91
24	10.3.228.92/30	10.3.228.93 – 10.3.228.94	10.3.228.95
25	10.3.228.96/30	10.3.228.97 – 10.3.228.98	10.3.228.99
26	10.3.228.100/30	10.3.228.101 – 10.3.228.102	10.3.228.103
27	10.3.228.104/30	10.3.228.105 – 10.3.228.106	10.3.228.107
28	10.3.228.108/30	10.3.228.109 – 10.3.228.110	10.3.228.111
29	10.3.228.112/30	10.3.228.113 – 10.3.228.114	10.3.228.115
30	10.3.228.116/30	10.3.228.117 – 10.3.228.118	10.3.228.119
31	10.3.228.120/30	10.3.228.121 – 10.3.228.122	10.3.228.123
32	10.3.228.124/30	10.3.228.125 – 10.3.228.126	10.3.228.127
33	10.3.228.128/30	10.3.228.129 – 10.3.228.130	10.3.228.131
34	10.3.228.132/30	10.3.228.133 – 10.3.228.134	10.3.228.135
35	10.3.228.136/30	10.3.228.137 – 10.3.228.138	10.3.228.139
36	10.3.228.140/30	10.3.228.141 – 10.3.228.142	10.3.228.143
37	10.3.228.144/30	10.3.228.145 – 10.3.228.146	10.3.228.147
38	10.3.228.148/30	10.3.228.149 – 10.3.228.150	10.3.228.151
39	10.3.228.152/30	10.3.228.153 – 10.3.228.154	10.3.228.155
40	10.3.228.156/30	10.3.228.157 – 10.3.228.158	10.3.228.159
41	10.3.228.160/30	10.3.228.161 – 10.3.228.162	10.3.228.163
42	10.3.228.164/30	10.3.228.165 – 10.3.228.166	10.3.228.167
43	10.3.228.168/30	10.3.228.169 – 10.3.228.170	10.3.228.171
44	10.3.228.172/30	10.3.228.173 – 10.3.228.174	10.3.228.175
45	10.3.228.176/30	10.3.228.177 – 10.3.228.178	10.3.228.179
46	10.3.228.180/30	10.3.228.181 – 10.3.228.182	10.3.228.183
47	10.3.228.184/30	10.3.228.185 – 10.3.228.186	10.3.228.187
48	10.3.228.188/30	10.3.228.189 – 10.3.228.190	10.3.228.191
49	10.3.228.192/30	10.3.228.193 – 10.3.228.194	10.3.228.195
50	10.3.228.196/30	10.3.228.197 – 10.3.228.198	10.3.228.199
51	10.3.228.200/30	10.3.228.201 – 10.3.228.202	10.3.228.203
52	10.3.228.204/30	10.3.228.205 – 10.3.228.206	10.3.228.207
53	10.3.228.208/30	10.3.228.209 – 10.3.228.210	10.3.228.211
54	10.3.228.212/30	10.3.228.213 – 10.3.228.214	10.3.228.215
55	10.3.228.216/30	10.3.228.217 – 10.3.228.218	10.3.228.219
56	10.3.228.220/30	10.3.228.221 – 10.3.228.222	10.3.228.223
57	10.3.228.224/30	10.3.228.225 – 10.3.228.226	10.3.228.227
58	10.3.228.228/30	10.3.228.229 – 10.3.228.230	10.3.228.231
59	10.3.228.232/30	10.3.228.233 – 10.3.228.234	10.3.228.235
60	10.3.228.236/30	10.3.228.237 – 10.3.228.238	10.3.228.239
61	10.3.228.240/30	10.3.228.241 – 10.3.228.242	10.3.228.243
62	10.3.228.244/30	10.3.228.245 – 10.3.228.246	10.3.228.247
63	10.3.228.248/30	10.3.228.249 – 10.3.228.250	10.3.228.251
64	10.3.228.252/30	10.3.228.253 – 10.3.228.254	10.3.228.255
65	10.3.229.0/30	10.3.229.1 – 10.3.229.2	10.3.229.3
66	10.3.229.4/30	10.3.229.5 – 10.3.229.6	10.3.229.7
67	10.3.229.8/30	10.3.229.9 – 10.3.229.10	10.3.229.11
68	10.3.229.12/30	10.3.229.13 – 10.3.229.14	10.3.229.15
69	10.3.229.16/30	10.3.229.17 – 10.3.229.18	10.3.229.19
70	10.3.229.20/30	10.3.229.21 – 10.3.229.22	10.3.229.23
71	10.3.229.24/30	10.3.229.25 – 10.3.229.26	10.3.229.27
72	10.3.229.28/30	10.3.229.29 – 10.3.229.30	10.3.229.31
73	10.3.229.32/30	10.3.229.33 – 10.3.229.34	10.3.229.35
74	10.3.229.36/30	10.3.229.37 – 10.3.229.38	10.3.229.39
75	10.3.229.40/30	10.3.229.41 – 10.3.229.42	10.3.229.43
76	10.3.229.44/30	10.3.229.45 – 10.3.229.46	10.3.229.47
77	10.3.229.48/30	10.3.229.49 – 10.3.229.50	10.3.229.51
78	10.3.229.52/30	10.3.229.53 – 10.3.229.54	10.3.229.55
79	10.3.229.56/30	10.3.229.57 – 10.3.229.58	10.3.229.59
80	10.3.229.60/30	10.3.229.61 – 10.3.229.62	10.3.229.63
81	10.3.229.64/30	10.3.229.65 – 10.3.229.66	10.3.229.67
82	10.3.229.68/30	10.3.229.69 – 10.3.229.70	10.3.229.71
83	10.3.229.72/30	10.3.229.73 – 10.3.229.74	10.3.229.75
84	10.3.229.76/30	10.3.229.77 – 10.3.229.78	10.3.229.79
85	10.3.229.80/30	10.3.229.81 – 10.3.229.82	10.3.229.83
86	10.3.229.84/30	10.3.229.85 – 10.3.229.86	10.3.229.87
87	10.3.229.88/30	10.3.229.89 – 10.3.229.90	10.3.229.91
88	10.3.229.92/30	10.3.229.93 – 10.3.229.94	10.3.229.95
89	10.3.229.96/30	10.3.229.97 – 10.3.229.98	10.3.229.99
90	10.3.229.100/30	10.3.229.101 – 10.3.229.102	10.3.229.103
91	10.3.229.104/30	10.3.229.105 – 10.3.229.106	10.3.229.107
92	10.3.229.108/30	10.3.229.109 – 10.3.229.110	10.3.229.111
93	10.3.229.112/30	10.3.229.113 – 10.3.229.114	10.3.229.115
94	10.3.229.116/30	10.3.229.117 – 10.3.229.118	10.3.229.119
95	10.3.229.120/30	10.3.229.121 – 10.3.229.122	10.3.229.123
96	10.3.229.124/30	10.3.229.125 – 10.3.229.126	10.3.229.127
97	10.3.229.128/30	10.3.229.129 – 10.3.229.130	10.3.229.131
98	10.3.229.132/30	10.3.229.133 – 10.3.229.134	10.3.229.135
99	10.3.229.136/30	10.3.229.137 – 10.3.229.138	10.3.229.139
100	10.3.229.140/30	10.3.229.141 – 10.3.229.142	10.3.229.143
101	10.3.229.144/30	10.3.229.145 – 10.3.229.146	10.3.229.147
102	10.3.229.148/30	10.3.229.149 – 10.3.229.150	10.3.229.151
103	10.3.229.152/30	10.3.229.153 – 10.3.229.154	10.3.229.155
104	10.3.229.156/30	10.3.229.157 – 10.3.229.158	10.3.229.159
105	10.3.229.160/30	10.3.229.161 – 10.3.229.162	10.3.229.163
106	10.3.229.164/30	10.3.229.165 – 10.3.229.166	10.3.229.167
107	10.3.229.168/30	10.3.229.169 – 10.3.229.170	10.3.229.171
108	10.3.229.172/30	10.3.229.173 – 10.3.229.174	10.3.229.175
109	10.3.229.176/30	10.3.229.177 – 10.3.229.178	10.3.229.179
110	10.3.229.180/30	10.3.229.181 – 10.3.229.182	10.3.229.183
111	10.3.229.184/30	10.3.229.185 – 10.3.229.186	10.3.229.187
112	10.3.229.188/30	10.3.229.189 – 10.3.229.190	10.3.229.191
113	10.3.229.192/30	10.3.229.193 – 10.3.229.194	10.3.229.195
114	10.3.229.196/30	10.3.229.197 – 10.3.229.198	10.3.229.199
115	10.3.229.200/30	10.3.229.201 – 10.3.229.202	10.3.229.203
116	10.3.229.204/30	10.3.229.205 – 10.3.229.206	10.3.229.207
117	10.3.229.208/30	10.3.229.209 – 10.3.229.210	10.3.229.211
118	10.3.229.212/30	10.3.229.213 – 10.3.229.214	10.3.229.215
119	10.3.229.216/30	10.3.229.217 – 10.3.229.218	10.3.229.219
120	10.3.229.220/30	10.3.229.221 – 10.3.229.222	10.3.229.223
121	10.3.229.224/30	10.3.229.225 – 10.3.229.226	10.3.229.227
122	10.3.229.228/30	10.3.229.229 – 10.3.229.230	10.3.229.231
123	10.3.229.232/30	10.3.229.233 – 10.3.229.234	10.3.229.235
124	10.3.229.236/30	10.3.229.237 – 10.3.229.238	10.3.229.239
125	10.3.229.240/30	10.3.229.241 – 10.3.229.242	10.3.229.243
126	10.3.229.244/30	10.3.229.245 – 10.3.229.246	10.3.229.247
127	10.3.229.248/30	10.3.229.249 – 10.3.229.250	10.3.229.251
128	10.3.229.252/30	10.3.229.253 – 10.3.229.254	10.3.229.255

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 →