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)192.168.1.192/26

network192.168.1.192/26

broadcast192.168.1.255

first host192.168.1.193

last host192.168.1.254

subnet mask255.255.255.192

wildcard0.0.0.63

addresses64

usable hosts62

classC

ipcalc 192.168.1.192/26

address11000000.10101000.00000001.11000000

subnet mask11111111.11111111.11111111.11000000

network11000000.10101000.00000001.11000000

broadcast11000000.10101000.00000001.11111111

green = network part, grey = host part

hex0xc0a801c0

decimal3232235968

reverse dns192.1.168.192.in-addr.arpa

ipv4-mapped::ffff:c0a8:1c0

/26 split into /32 · 64 subnets

close ×

#	network	host range	broadcast
1	192.168.1.192/32	192.168.1.192 – 192.168.1.192	192.168.1.192
2	192.168.1.193/32	192.168.1.193 – 192.168.1.193	192.168.1.193
3	192.168.1.194/32	192.168.1.194 – 192.168.1.194	192.168.1.194
4	192.168.1.195/32	192.168.1.195 – 192.168.1.195	192.168.1.195
5	192.168.1.196/32	192.168.1.196 – 192.168.1.196	192.168.1.196
6	192.168.1.197/32	192.168.1.197 – 192.168.1.197	192.168.1.197
7	192.168.1.198/32	192.168.1.198 – 192.168.1.198	192.168.1.198
8	192.168.1.199/32	192.168.1.199 – 192.168.1.199	192.168.1.199
9	192.168.1.200/32	192.168.1.200 – 192.168.1.200	192.168.1.200
10	192.168.1.201/32	192.168.1.201 – 192.168.1.201	192.168.1.201
11	192.168.1.202/32	192.168.1.202 – 192.168.1.202	192.168.1.202
12	192.168.1.203/32	192.168.1.203 – 192.168.1.203	192.168.1.203
13	192.168.1.204/32	192.168.1.204 – 192.168.1.204	192.168.1.204
14	192.168.1.205/32	192.168.1.205 – 192.168.1.205	192.168.1.205
15	192.168.1.206/32	192.168.1.206 – 192.168.1.206	192.168.1.206
16	192.168.1.207/32	192.168.1.207 – 192.168.1.207	192.168.1.207
17	192.168.1.208/32	192.168.1.208 – 192.168.1.208	192.168.1.208
18	192.168.1.209/32	192.168.1.209 – 192.168.1.209	192.168.1.209
19	192.168.1.210/32	192.168.1.210 – 192.168.1.210	192.168.1.210
20	192.168.1.211/32	192.168.1.211 – 192.168.1.211	192.168.1.211
21	192.168.1.212/32	192.168.1.212 – 192.168.1.212	192.168.1.212
22	192.168.1.213/32	192.168.1.213 – 192.168.1.213	192.168.1.213
23	192.168.1.214/32	192.168.1.214 – 192.168.1.214	192.168.1.214
24	192.168.1.215/32	192.168.1.215 – 192.168.1.215	192.168.1.215
25	192.168.1.216/32	192.168.1.216 – 192.168.1.216	192.168.1.216
26	192.168.1.217/32	192.168.1.217 – 192.168.1.217	192.168.1.217
27	192.168.1.218/32	192.168.1.218 – 192.168.1.218	192.168.1.218
28	192.168.1.219/32	192.168.1.219 – 192.168.1.219	192.168.1.219
29	192.168.1.220/32	192.168.1.220 – 192.168.1.220	192.168.1.220
30	192.168.1.221/32	192.168.1.221 – 192.168.1.221	192.168.1.221
31	192.168.1.222/32	192.168.1.222 – 192.168.1.222	192.168.1.222
32	192.168.1.223/32	192.168.1.223 – 192.168.1.223	192.168.1.223
33	192.168.1.224/32	192.168.1.224 – 192.168.1.224	192.168.1.224
34	192.168.1.225/32	192.168.1.225 – 192.168.1.225	192.168.1.225
35	192.168.1.226/32	192.168.1.226 – 192.168.1.226	192.168.1.226
36	192.168.1.227/32	192.168.1.227 – 192.168.1.227	192.168.1.227
37	192.168.1.228/32	192.168.1.228 – 192.168.1.228	192.168.1.228
38	192.168.1.229/32	192.168.1.229 – 192.168.1.229	192.168.1.229
39	192.168.1.230/32	192.168.1.230 – 192.168.1.230	192.168.1.230
40	192.168.1.231/32	192.168.1.231 – 192.168.1.231	192.168.1.231
41	192.168.1.232/32	192.168.1.232 – 192.168.1.232	192.168.1.232
42	192.168.1.233/32	192.168.1.233 – 192.168.1.233	192.168.1.233
43	192.168.1.234/32	192.168.1.234 – 192.168.1.234	192.168.1.234
44	192.168.1.235/32	192.168.1.235 – 192.168.1.235	192.168.1.235
45	192.168.1.236/32	192.168.1.236 – 192.168.1.236	192.168.1.236
46	192.168.1.237/32	192.168.1.237 – 192.168.1.237	192.168.1.237
47	192.168.1.238/32	192.168.1.238 – 192.168.1.238	192.168.1.238
48	192.168.1.239/32	192.168.1.239 – 192.168.1.239	192.168.1.239
49	192.168.1.240/32	192.168.1.240 – 192.168.1.240	192.168.1.240
50	192.168.1.241/32	192.168.1.241 – 192.168.1.241	192.168.1.241
51	192.168.1.242/32	192.168.1.242 – 192.168.1.242	192.168.1.242
52	192.168.1.243/32	192.168.1.243 – 192.168.1.243	192.168.1.243
53	192.168.1.244/32	192.168.1.244 – 192.168.1.244	192.168.1.244
54	192.168.1.245/32	192.168.1.245 – 192.168.1.245	192.168.1.245
55	192.168.1.246/32	192.168.1.246 – 192.168.1.246	192.168.1.246
56	192.168.1.247/32	192.168.1.247 – 192.168.1.247	192.168.1.247
57	192.168.1.248/32	192.168.1.248 – 192.168.1.248	192.168.1.248
58	192.168.1.249/32	192.168.1.249 – 192.168.1.249	192.168.1.249
59	192.168.1.250/32	192.168.1.250 – 192.168.1.250	192.168.1.250
60	192.168.1.251/32	192.168.1.251 – 192.168.1.251	192.168.1.251
61	192.168.1.252/32	192.168.1.252 – 192.168.1.252	192.168.1.252
62	192.168.1.253/32	192.168.1.253 – 192.168.1.253	192.168.1.253
63	192.168.1.254/32	192.168.1.254 – 192.168.1.254	192.168.1.254
64	192.168.1.255/32	192.168.1.255 – 192.168.1.255	192.168.1.255

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 /26
/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	-
/24	255.255.255.0	256	254	-
/25	255.255.255.128	128	126	-
/26	255.255.255.192	64	62	1
/27	255.255.255.224	32	30	2 split →
/28	255.255.255.240	16	14	4 split →
/29	255.255.255.248	8	6	8 split →
/30	255.255.255.252	4	2	16 split →
/31	255.255.255.254	2	2	32 split →
/32	255.255.255.255	1	1	64 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 →