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)10.3.94.0/23

network10.3.94.0/23

broadcast10.3.95.255

first host10.3.94.1

last host10.3.95.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.94.0/23

address00001010.00000011.01011110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.01011110.00000000

broadcast00001010.00000011.01011111.11111111

green = network part, grey = host part

hex0x0a035e00

decimal167992832

reverse dns0.94.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:5e00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.94.0/30	10.3.94.1 – 10.3.94.2	10.3.94.3
2	10.3.94.4/30	10.3.94.5 – 10.3.94.6	10.3.94.7
3	10.3.94.8/30	10.3.94.9 – 10.3.94.10	10.3.94.11
4	10.3.94.12/30	10.3.94.13 – 10.3.94.14	10.3.94.15
5	10.3.94.16/30	10.3.94.17 – 10.3.94.18	10.3.94.19
6	10.3.94.20/30	10.3.94.21 – 10.3.94.22	10.3.94.23
7	10.3.94.24/30	10.3.94.25 – 10.3.94.26	10.3.94.27
8	10.3.94.28/30	10.3.94.29 – 10.3.94.30	10.3.94.31
9	10.3.94.32/30	10.3.94.33 – 10.3.94.34	10.3.94.35
10	10.3.94.36/30	10.3.94.37 – 10.3.94.38	10.3.94.39
11	10.3.94.40/30	10.3.94.41 – 10.3.94.42	10.3.94.43
12	10.3.94.44/30	10.3.94.45 – 10.3.94.46	10.3.94.47
13	10.3.94.48/30	10.3.94.49 – 10.3.94.50	10.3.94.51
14	10.3.94.52/30	10.3.94.53 – 10.3.94.54	10.3.94.55
15	10.3.94.56/30	10.3.94.57 – 10.3.94.58	10.3.94.59
16	10.3.94.60/30	10.3.94.61 – 10.3.94.62	10.3.94.63
17	10.3.94.64/30	10.3.94.65 – 10.3.94.66	10.3.94.67
18	10.3.94.68/30	10.3.94.69 – 10.3.94.70	10.3.94.71
19	10.3.94.72/30	10.3.94.73 – 10.3.94.74	10.3.94.75
20	10.3.94.76/30	10.3.94.77 – 10.3.94.78	10.3.94.79
21	10.3.94.80/30	10.3.94.81 – 10.3.94.82	10.3.94.83
22	10.3.94.84/30	10.3.94.85 – 10.3.94.86	10.3.94.87
23	10.3.94.88/30	10.3.94.89 – 10.3.94.90	10.3.94.91
24	10.3.94.92/30	10.3.94.93 – 10.3.94.94	10.3.94.95
25	10.3.94.96/30	10.3.94.97 – 10.3.94.98	10.3.94.99
26	10.3.94.100/30	10.3.94.101 – 10.3.94.102	10.3.94.103
27	10.3.94.104/30	10.3.94.105 – 10.3.94.106	10.3.94.107
28	10.3.94.108/30	10.3.94.109 – 10.3.94.110	10.3.94.111
29	10.3.94.112/30	10.3.94.113 – 10.3.94.114	10.3.94.115
30	10.3.94.116/30	10.3.94.117 – 10.3.94.118	10.3.94.119
31	10.3.94.120/30	10.3.94.121 – 10.3.94.122	10.3.94.123
32	10.3.94.124/30	10.3.94.125 – 10.3.94.126	10.3.94.127
33	10.3.94.128/30	10.3.94.129 – 10.3.94.130	10.3.94.131
34	10.3.94.132/30	10.3.94.133 – 10.3.94.134	10.3.94.135
35	10.3.94.136/30	10.3.94.137 – 10.3.94.138	10.3.94.139
36	10.3.94.140/30	10.3.94.141 – 10.3.94.142	10.3.94.143
37	10.3.94.144/30	10.3.94.145 – 10.3.94.146	10.3.94.147
38	10.3.94.148/30	10.3.94.149 – 10.3.94.150	10.3.94.151
39	10.3.94.152/30	10.3.94.153 – 10.3.94.154	10.3.94.155
40	10.3.94.156/30	10.3.94.157 – 10.3.94.158	10.3.94.159
41	10.3.94.160/30	10.3.94.161 – 10.3.94.162	10.3.94.163
42	10.3.94.164/30	10.3.94.165 – 10.3.94.166	10.3.94.167
43	10.3.94.168/30	10.3.94.169 – 10.3.94.170	10.3.94.171
44	10.3.94.172/30	10.3.94.173 – 10.3.94.174	10.3.94.175
45	10.3.94.176/30	10.3.94.177 – 10.3.94.178	10.3.94.179
46	10.3.94.180/30	10.3.94.181 – 10.3.94.182	10.3.94.183
47	10.3.94.184/30	10.3.94.185 – 10.3.94.186	10.3.94.187
48	10.3.94.188/30	10.3.94.189 – 10.3.94.190	10.3.94.191
49	10.3.94.192/30	10.3.94.193 – 10.3.94.194	10.3.94.195
50	10.3.94.196/30	10.3.94.197 – 10.3.94.198	10.3.94.199
51	10.3.94.200/30	10.3.94.201 – 10.3.94.202	10.3.94.203
52	10.3.94.204/30	10.3.94.205 – 10.3.94.206	10.3.94.207
53	10.3.94.208/30	10.3.94.209 – 10.3.94.210	10.3.94.211
54	10.3.94.212/30	10.3.94.213 – 10.3.94.214	10.3.94.215
55	10.3.94.216/30	10.3.94.217 – 10.3.94.218	10.3.94.219
56	10.3.94.220/30	10.3.94.221 – 10.3.94.222	10.3.94.223
57	10.3.94.224/30	10.3.94.225 – 10.3.94.226	10.3.94.227
58	10.3.94.228/30	10.3.94.229 – 10.3.94.230	10.3.94.231
59	10.3.94.232/30	10.3.94.233 – 10.3.94.234	10.3.94.235
60	10.3.94.236/30	10.3.94.237 – 10.3.94.238	10.3.94.239
61	10.3.94.240/30	10.3.94.241 – 10.3.94.242	10.3.94.243
62	10.3.94.244/30	10.3.94.245 – 10.3.94.246	10.3.94.247
63	10.3.94.248/30	10.3.94.249 – 10.3.94.250	10.3.94.251
64	10.3.94.252/30	10.3.94.253 – 10.3.94.254	10.3.94.255
65	10.3.95.0/30	10.3.95.1 – 10.3.95.2	10.3.95.3
66	10.3.95.4/30	10.3.95.5 – 10.3.95.6	10.3.95.7
67	10.3.95.8/30	10.3.95.9 – 10.3.95.10	10.3.95.11
68	10.3.95.12/30	10.3.95.13 – 10.3.95.14	10.3.95.15
69	10.3.95.16/30	10.3.95.17 – 10.3.95.18	10.3.95.19
70	10.3.95.20/30	10.3.95.21 – 10.3.95.22	10.3.95.23
71	10.3.95.24/30	10.3.95.25 – 10.3.95.26	10.3.95.27
72	10.3.95.28/30	10.3.95.29 – 10.3.95.30	10.3.95.31
73	10.3.95.32/30	10.3.95.33 – 10.3.95.34	10.3.95.35
74	10.3.95.36/30	10.3.95.37 – 10.3.95.38	10.3.95.39
75	10.3.95.40/30	10.3.95.41 – 10.3.95.42	10.3.95.43
76	10.3.95.44/30	10.3.95.45 – 10.3.95.46	10.3.95.47
77	10.3.95.48/30	10.3.95.49 – 10.3.95.50	10.3.95.51
78	10.3.95.52/30	10.3.95.53 – 10.3.95.54	10.3.95.55
79	10.3.95.56/30	10.3.95.57 – 10.3.95.58	10.3.95.59
80	10.3.95.60/30	10.3.95.61 – 10.3.95.62	10.3.95.63
81	10.3.95.64/30	10.3.95.65 – 10.3.95.66	10.3.95.67
82	10.3.95.68/30	10.3.95.69 – 10.3.95.70	10.3.95.71
83	10.3.95.72/30	10.3.95.73 – 10.3.95.74	10.3.95.75
84	10.3.95.76/30	10.3.95.77 – 10.3.95.78	10.3.95.79
85	10.3.95.80/30	10.3.95.81 – 10.3.95.82	10.3.95.83
86	10.3.95.84/30	10.3.95.85 – 10.3.95.86	10.3.95.87
87	10.3.95.88/30	10.3.95.89 – 10.3.95.90	10.3.95.91
88	10.3.95.92/30	10.3.95.93 – 10.3.95.94	10.3.95.95
89	10.3.95.96/30	10.3.95.97 – 10.3.95.98	10.3.95.99
90	10.3.95.100/30	10.3.95.101 – 10.3.95.102	10.3.95.103
91	10.3.95.104/30	10.3.95.105 – 10.3.95.106	10.3.95.107
92	10.3.95.108/30	10.3.95.109 – 10.3.95.110	10.3.95.111
93	10.3.95.112/30	10.3.95.113 – 10.3.95.114	10.3.95.115
94	10.3.95.116/30	10.3.95.117 – 10.3.95.118	10.3.95.119
95	10.3.95.120/30	10.3.95.121 – 10.3.95.122	10.3.95.123
96	10.3.95.124/30	10.3.95.125 – 10.3.95.126	10.3.95.127
97	10.3.95.128/30	10.3.95.129 – 10.3.95.130	10.3.95.131
98	10.3.95.132/30	10.3.95.133 – 10.3.95.134	10.3.95.135
99	10.3.95.136/30	10.3.95.137 – 10.3.95.138	10.3.95.139
100	10.3.95.140/30	10.3.95.141 – 10.3.95.142	10.3.95.143
101	10.3.95.144/30	10.3.95.145 – 10.3.95.146	10.3.95.147
102	10.3.95.148/30	10.3.95.149 – 10.3.95.150	10.3.95.151
103	10.3.95.152/30	10.3.95.153 – 10.3.95.154	10.3.95.155
104	10.3.95.156/30	10.3.95.157 – 10.3.95.158	10.3.95.159
105	10.3.95.160/30	10.3.95.161 – 10.3.95.162	10.3.95.163
106	10.3.95.164/30	10.3.95.165 – 10.3.95.166	10.3.95.167
107	10.3.95.168/30	10.3.95.169 – 10.3.95.170	10.3.95.171
108	10.3.95.172/30	10.3.95.173 – 10.3.95.174	10.3.95.175
109	10.3.95.176/30	10.3.95.177 – 10.3.95.178	10.3.95.179
110	10.3.95.180/30	10.3.95.181 – 10.3.95.182	10.3.95.183
111	10.3.95.184/30	10.3.95.185 – 10.3.95.186	10.3.95.187
112	10.3.95.188/30	10.3.95.189 – 10.3.95.190	10.3.95.191
113	10.3.95.192/30	10.3.95.193 – 10.3.95.194	10.3.95.195
114	10.3.95.196/30	10.3.95.197 – 10.3.95.198	10.3.95.199
115	10.3.95.200/30	10.3.95.201 – 10.3.95.202	10.3.95.203
116	10.3.95.204/30	10.3.95.205 – 10.3.95.206	10.3.95.207
117	10.3.95.208/30	10.3.95.209 – 10.3.95.210	10.3.95.211
118	10.3.95.212/30	10.3.95.213 – 10.3.95.214	10.3.95.215
119	10.3.95.216/30	10.3.95.217 – 10.3.95.218	10.3.95.219
120	10.3.95.220/30	10.3.95.221 – 10.3.95.222	10.3.95.223
121	10.3.95.224/30	10.3.95.225 – 10.3.95.226	10.3.95.227
122	10.3.95.228/30	10.3.95.229 – 10.3.95.230	10.3.95.231
123	10.3.95.232/30	10.3.95.233 – 10.3.95.234	10.3.95.235
124	10.3.95.236/30	10.3.95.237 – 10.3.95.238	10.3.95.239
125	10.3.95.240/30	10.3.95.241 – 10.3.95.242	10.3.95.243
126	10.3.95.244/30	10.3.95.245 – 10.3.95.246	10.3.95.247
127	10.3.95.248/30	10.3.95.249 – 10.3.95.250	10.3.95.251
128	10.3.95.252/30	10.3.95.253 – 10.3.95.254	10.3.95.255

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 →