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)10.131.46.0/23

network10.131.46.0/23

broadcast10.131.47.255

first host10.131.46.1

last host10.131.47.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.131.46.0/23

address00001010.10000011.00101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10000011.00101110.00000000

broadcast00001010.10000011.00101111.11111111

green = network part, grey = host part

hex0x0a832e00

decimal176369152

reverse dns0.46.131.10.in-addr.arpa

ipv4-mapped::ffff:a83:2e00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.131.46.0/30	10.131.46.1 – 10.131.46.2	10.131.46.3
2	10.131.46.4/30	10.131.46.5 – 10.131.46.6	10.131.46.7
3	10.131.46.8/30	10.131.46.9 – 10.131.46.10	10.131.46.11
4	10.131.46.12/30	10.131.46.13 – 10.131.46.14	10.131.46.15
5	10.131.46.16/30	10.131.46.17 – 10.131.46.18	10.131.46.19
6	10.131.46.20/30	10.131.46.21 – 10.131.46.22	10.131.46.23
7	10.131.46.24/30	10.131.46.25 – 10.131.46.26	10.131.46.27
8	10.131.46.28/30	10.131.46.29 – 10.131.46.30	10.131.46.31
9	10.131.46.32/30	10.131.46.33 – 10.131.46.34	10.131.46.35
10	10.131.46.36/30	10.131.46.37 – 10.131.46.38	10.131.46.39
11	10.131.46.40/30	10.131.46.41 – 10.131.46.42	10.131.46.43
12	10.131.46.44/30	10.131.46.45 – 10.131.46.46	10.131.46.47
13	10.131.46.48/30	10.131.46.49 – 10.131.46.50	10.131.46.51
14	10.131.46.52/30	10.131.46.53 – 10.131.46.54	10.131.46.55
15	10.131.46.56/30	10.131.46.57 – 10.131.46.58	10.131.46.59
16	10.131.46.60/30	10.131.46.61 – 10.131.46.62	10.131.46.63
17	10.131.46.64/30	10.131.46.65 – 10.131.46.66	10.131.46.67
18	10.131.46.68/30	10.131.46.69 – 10.131.46.70	10.131.46.71
19	10.131.46.72/30	10.131.46.73 – 10.131.46.74	10.131.46.75
20	10.131.46.76/30	10.131.46.77 – 10.131.46.78	10.131.46.79
21	10.131.46.80/30	10.131.46.81 – 10.131.46.82	10.131.46.83
22	10.131.46.84/30	10.131.46.85 – 10.131.46.86	10.131.46.87
23	10.131.46.88/30	10.131.46.89 – 10.131.46.90	10.131.46.91
24	10.131.46.92/30	10.131.46.93 – 10.131.46.94	10.131.46.95
25	10.131.46.96/30	10.131.46.97 – 10.131.46.98	10.131.46.99
26	10.131.46.100/30	10.131.46.101 – 10.131.46.102	10.131.46.103
27	10.131.46.104/30	10.131.46.105 – 10.131.46.106	10.131.46.107
28	10.131.46.108/30	10.131.46.109 – 10.131.46.110	10.131.46.111
29	10.131.46.112/30	10.131.46.113 – 10.131.46.114	10.131.46.115
30	10.131.46.116/30	10.131.46.117 – 10.131.46.118	10.131.46.119
31	10.131.46.120/30	10.131.46.121 – 10.131.46.122	10.131.46.123
32	10.131.46.124/30	10.131.46.125 – 10.131.46.126	10.131.46.127
33	10.131.46.128/30	10.131.46.129 – 10.131.46.130	10.131.46.131
34	10.131.46.132/30	10.131.46.133 – 10.131.46.134	10.131.46.135
35	10.131.46.136/30	10.131.46.137 – 10.131.46.138	10.131.46.139
36	10.131.46.140/30	10.131.46.141 – 10.131.46.142	10.131.46.143
37	10.131.46.144/30	10.131.46.145 – 10.131.46.146	10.131.46.147
38	10.131.46.148/30	10.131.46.149 – 10.131.46.150	10.131.46.151
39	10.131.46.152/30	10.131.46.153 – 10.131.46.154	10.131.46.155
40	10.131.46.156/30	10.131.46.157 – 10.131.46.158	10.131.46.159
41	10.131.46.160/30	10.131.46.161 – 10.131.46.162	10.131.46.163
42	10.131.46.164/30	10.131.46.165 – 10.131.46.166	10.131.46.167
43	10.131.46.168/30	10.131.46.169 – 10.131.46.170	10.131.46.171
44	10.131.46.172/30	10.131.46.173 – 10.131.46.174	10.131.46.175
45	10.131.46.176/30	10.131.46.177 – 10.131.46.178	10.131.46.179
46	10.131.46.180/30	10.131.46.181 – 10.131.46.182	10.131.46.183
47	10.131.46.184/30	10.131.46.185 – 10.131.46.186	10.131.46.187
48	10.131.46.188/30	10.131.46.189 – 10.131.46.190	10.131.46.191
49	10.131.46.192/30	10.131.46.193 – 10.131.46.194	10.131.46.195
50	10.131.46.196/30	10.131.46.197 – 10.131.46.198	10.131.46.199
51	10.131.46.200/30	10.131.46.201 – 10.131.46.202	10.131.46.203
52	10.131.46.204/30	10.131.46.205 – 10.131.46.206	10.131.46.207
53	10.131.46.208/30	10.131.46.209 – 10.131.46.210	10.131.46.211
54	10.131.46.212/30	10.131.46.213 – 10.131.46.214	10.131.46.215
55	10.131.46.216/30	10.131.46.217 – 10.131.46.218	10.131.46.219
56	10.131.46.220/30	10.131.46.221 – 10.131.46.222	10.131.46.223
57	10.131.46.224/30	10.131.46.225 – 10.131.46.226	10.131.46.227
58	10.131.46.228/30	10.131.46.229 – 10.131.46.230	10.131.46.231
59	10.131.46.232/30	10.131.46.233 – 10.131.46.234	10.131.46.235
60	10.131.46.236/30	10.131.46.237 – 10.131.46.238	10.131.46.239
61	10.131.46.240/30	10.131.46.241 – 10.131.46.242	10.131.46.243
62	10.131.46.244/30	10.131.46.245 – 10.131.46.246	10.131.46.247
63	10.131.46.248/30	10.131.46.249 – 10.131.46.250	10.131.46.251
64	10.131.46.252/30	10.131.46.253 – 10.131.46.254	10.131.46.255
65	10.131.47.0/30	10.131.47.1 – 10.131.47.2	10.131.47.3
66	10.131.47.4/30	10.131.47.5 – 10.131.47.6	10.131.47.7
67	10.131.47.8/30	10.131.47.9 – 10.131.47.10	10.131.47.11
68	10.131.47.12/30	10.131.47.13 – 10.131.47.14	10.131.47.15
69	10.131.47.16/30	10.131.47.17 – 10.131.47.18	10.131.47.19
70	10.131.47.20/30	10.131.47.21 – 10.131.47.22	10.131.47.23
71	10.131.47.24/30	10.131.47.25 – 10.131.47.26	10.131.47.27
72	10.131.47.28/30	10.131.47.29 – 10.131.47.30	10.131.47.31
73	10.131.47.32/30	10.131.47.33 – 10.131.47.34	10.131.47.35
74	10.131.47.36/30	10.131.47.37 – 10.131.47.38	10.131.47.39
75	10.131.47.40/30	10.131.47.41 – 10.131.47.42	10.131.47.43
76	10.131.47.44/30	10.131.47.45 – 10.131.47.46	10.131.47.47
77	10.131.47.48/30	10.131.47.49 – 10.131.47.50	10.131.47.51
78	10.131.47.52/30	10.131.47.53 – 10.131.47.54	10.131.47.55
79	10.131.47.56/30	10.131.47.57 – 10.131.47.58	10.131.47.59
80	10.131.47.60/30	10.131.47.61 – 10.131.47.62	10.131.47.63
81	10.131.47.64/30	10.131.47.65 – 10.131.47.66	10.131.47.67
82	10.131.47.68/30	10.131.47.69 – 10.131.47.70	10.131.47.71
83	10.131.47.72/30	10.131.47.73 – 10.131.47.74	10.131.47.75
84	10.131.47.76/30	10.131.47.77 – 10.131.47.78	10.131.47.79
85	10.131.47.80/30	10.131.47.81 – 10.131.47.82	10.131.47.83
86	10.131.47.84/30	10.131.47.85 – 10.131.47.86	10.131.47.87
87	10.131.47.88/30	10.131.47.89 – 10.131.47.90	10.131.47.91
88	10.131.47.92/30	10.131.47.93 – 10.131.47.94	10.131.47.95
89	10.131.47.96/30	10.131.47.97 – 10.131.47.98	10.131.47.99
90	10.131.47.100/30	10.131.47.101 – 10.131.47.102	10.131.47.103
91	10.131.47.104/30	10.131.47.105 – 10.131.47.106	10.131.47.107
92	10.131.47.108/30	10.131.47.109 – 10.131.47.110	10.131.47.111
93	10.131.47.112/30	10.131.47.113 – 10.131.47.114	10.131.47.115
94	10.131.47.116/30	10.131.47.117 – 10.131.47.118	10.131.47.119
95	10.131.47.120/30	10.131.47.121 – 10.131.47.122	10.131.47.123
96	10.131.47.124/30	10.131.47.125 – 10.131.47.126	10.131.47.127
97	10.131.47.128/30	10.131.47.129 – 10.131.47.130	10.131.47.131
98	10.131.47.132/30	10.131.47.133 – 10.131.47.134	10.131.47.135
99	10.131.47.136/30	10.131.47.137 – 10.131.47.138	10.131.47.139
100	10.131.47.140/30	10.131.47.141 – 10.131.47.142	10.131.47.143
101	10.131.47.144/30	10.131.47.145 – 10.131.47.146	10.131.47.147
102	10.131.47.148/30	10.131.47.149 – 10.131.47.150	10.131.47.151
103	10.131.47.152/30	10.131.47.153 – 10.131.47.154	10.131.47.155
104	10.131.47.156/30	10.131.47.157 – 10.131.47.158	10.131.47.159
105	10.131.47.160/30	10.131.47.161 – 10.131.47.162	10.131.47.163
106	10.131.47.164/30	10.131.47.165 – 10.131.47.166	10.131.47.167
107	10.131.47.168/30	10.131.47.169 – 10.131.47.170	10.131.47.171
108	10.131.47.172/30	10.131.47.173 – 10.131.47.174	10.131.47.175
109	10.131.47.176/30	10.131.47.177 – 10.131.47.178	10.131.47.179
110	10.131.47.180/30	10.131.47.181 – 10.131.47.182	10.131.47.183
111	10.131.47.184/30	10.131.47.185 – 10.131.47.186	10.131.47.187
112	10.131.47.188/30	10.131.47.189 – 10.131.47.190	10.131.47.191
113	10.131.47.192/30	10.131.47.193 – 10.131.47.194	10.131.47.195
114	10.131.47.196/30	10.131.47.197 – 10.131.47.198	10.131.47.199
115	10.131.47.200/30	10.131.47.201 – 10.131.47.202	10.131.47.203
116	10.131.47.204/30	10.131.47.205 – 10.131.47.206	10.131.47.207
117	10.131.47.208/30	10.131.47.209 – 10.131.47.210	10.131.47.211
118	10.131.47.212/30	10.131.47.213 – 10.131.47.214	10.131.47.215
119	10.131.47.216/30	10.131.47.217 – 10.131.47.218	10.131.47.219
120	10.131.47.220/30	10.131.47.221 – 10.131.47.222	10.131.47.223
121	10.131.47.224/30	10.131.47.225 – 10.131.47.226	10.131.47.227
122	10.131.47.228/30	10.131.47.229 – 10.131.47.230	10.131.47.231
123	10.131.47.232/30	10.131.47.233 – 10.131.47.234	10.131.47.235
124	10.131.47.236/30	10.131.47.237 – 10.131.47.238	10.131.47.239
125	10.131.47.240/30	10.131.47.241 – 10.131.47.242	10.131.47.243
126	10.131.47.244/30	10.131.47.245 – 10.131.47.246	10.131.47.247
127	10.131.47.248/30	10.131.47.249 – 10.131.47.250	10.131.47.251
128	10.131.47.252/30	10.131.47.253 – 10.131.47.254	10.131.47.255

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 →