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)10.167.105.192/26

network10.167.105.192/26

broadcast10.167.105.255

first host10.167.105.193

last host10.167.105.254

subnet mask255.255.255.192

wildcard0.0.0.63

addresses64

usable hosts62

classA

ipcalc 10.167.105.192/26

address00001010.10100111.01101001.11000000

subnet mask11111111.11111111.11111111.11000000

network00001010.10100111.01101001.11000000

broadcast00001010.10100111.01101001.11111111

green = network part, grey = host part

hex0x0aa769c0

decimal178743744

reverse dns192.105.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:69c0

/26 split into /32 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.105.192/32	10.167.105.192 – 10.167.105.192	10.167.105.192
2	10.167.105.193/32	10.167.105.193 – 10.167.105.193	10.167.105.193
3	10.167.105.194/32	10.167.105.194 – 10.167.105.194	10.167.105.194
4	10.167.105.195/32	10.167.105.195 – 10.167.105.195	10.167.105.195
5	10.167.105.196/32	10.167.105.196 – 10.167.105.196	10.167.105.196
6	10.167.105.197/32	10.167.105.197 – 10.167.105.197	10.167.105.197
7	10.167.105.198/32	10.167.105.198 – 10.167.105.198	10.167.105.198
8	10.167.105.199/32	10.167.105.199 – 10.167.105.199	10.167.105.199
9	10.167.105.200/32	10.167.105.200 – 10.167.105.200	10.167.105.200
10	10.167.105.201/32	10.167.105.201 – 10.167.105.201	10.167.105.201
11	10.167.105.202/32	10.167.105.202 – 10.167.105.202	10.167.105.202
12	10.167.105.203/32	10.167.105.203 – 10.167.105.203	10.167.105.203
13	10.167.105.204/32	10.167.105.204 – 10.167.105.204	10.167.105.204
14	10.167.105.205/32	10.167.105.205 – 10.167.105.205	10.167.105.205
15	10.167.105.206/32	10.167.105.206 – 10.167.105.206	10.167.105.206
16	10.167.105.207/32	10.167.105.207 – 10.167.105.207	10.167.105.207
17	10.167.105.208/32	10.167.105.208 – 10.167.105.208	10.167.105.208
18	10.167.105.209/32	10.167.105.209 – 10.167.105.209	10.167.105.209
19	10.167.105.210/32	10.167.105.210 – 10.167.105.210	10.167.105.210
20	10.167.105.211/32	10.167.105.211 – 10.167.105.211	10.167.105.211
21	10.167.105.212/32	10.167.105.212 – 10.167.105.212	10.167.105.212
22	10.167.105.213/32	10.167.105.213 – 10.167.105.213	10.167.105.213
23	10.167.105.214/32	10.167.105.214 – 10.167.105.214	10.167.105.214
24	10.167.105.215/32	10.167.105.215 – 10.167.105.215	10.167.105.215
25	10.167.105.216/32	10.167.105.216 – 10.167.105.216	10.167.105.216
26	10.167.105.217/32	10.167.105.217 – 10.167.105.217	10.167.105.217
27	10.167.105.218/32	10.167.105.218 – 10.167.105.218	10.167.105.218
28	10.167.105.219/32	10.167.105.219 – 10.167.105.219	10.167.105.219
29	10.167.105.220/32	10.167.105.220 – 10.167.105.220	10.167.105.220
30	10.167.105.221/32	10.167.105.221 – 10.167.105.221	10.167.105.221
31	10.167.105.222/32	10.167.105.222 – 10.167.105.222	10.167.105.222
32	10.167.105.223/32	10.167.105.223 – 10.167.105.223	10.167.105.223
33	10.167.105.224/32	10.167.105.224 – 10.167.105.224	10.167.105.224
34	10.167.105.225/32	10.167.105.225 – 10.167.105.225	10.167.105.225
35	10.167.105.226/32	10.167.105.226 – 10.167.105.226	10.167.105.226
36	10.167.105.227/32	10.167.105.227 – 10.167.105.227	10.167.105.227
37	10.167.105.228/32	10.167.105.228 – 10.167.105.228	10.167.105.228
38	10.167.105.229/32	10.167.105.229 – 10.167.105.229	10.167.105.229
39	10.167.105.230/32	10.167.105.230 – 10.167.105.230	10.167.105.230
40	10.167.105.231/32	10.167.105.231 – 10.167.105.231	10.167.105.231
41	10.167.105.232/32	10.167.105.232 – 10.167.105.232	10.167.105.232
42	10.167.105.233/32	10.167.105.233 – 10.167.105.233	10.167.105.233
43	10.167.105.234/32	10.167.105.234 – 10.167.105.234	10.167.105.234
44	10.167.105.235/32	10.167.105.235 – 10.167.105.235	10.167.105.235
45	10.167.105.236/32	10.167.105.236 – 10.167.105.236	10.167.105.236
46	10.167.105.237/32	10.167.105.237 – 10.167.105.237	10.167.105.237
47	10.167.105.238/32	10.167.105.238 – 10.167.105.238	10.167.105.238
48	10.167.105.239/32	10.167.105.239 – 10.167.105.239	10.167.105.239
49	10.167.105.240/32	10.167.105.240 – 10.167.105.240	10.167.105.240
50	10.167.105.241/32	10.167.105.241 – 10.167.105.241	10.167.105.241
51	10.167.105.242/32	10.167.105.242 – 10.167.105.242	10.167.105.242
52	10.167.105.243/32	10.167.105.243 – 10.167.105.243	10.167.105.243
53	10.167.105.244/32	10.167.105.244 – 10.167.105.244	10.167.105.244
54	10.167.105.245/32	10.167.105.245 – 10.167.105.245	10.167.105.245
55	10.167.105.246/32	10.167.105.246 – 10.167.105.246	10.167.105.246
56	10.167.105.247/32	10.167.105.247 – 10.167.105.247	10.167.105.247
57	10.167.105.248/32	10.167.105.248 – 10.167.105.248	10.167.105.248
58	10.167.105.249/32	10.167.105.249 – 10.167.105.249	10.167.105.249
59	10.167.105.250/32	10.167.105.250 – 10.167.105.250	10.167.105.250
60	10.167.105.251/32	10.167.105.251 – 10.167.105.251	10.167.105.251
61	10.167.105.252/32	10.167.105.252 – 10.167.105.252	10.167.105.252
62	10.167.105.253/32	10.167.105.253 – 10.167.105.253	10.167.105.253
63	10.167.105.254/32	10.167.105.254 – 10.167.105.254	10.167.105.254
64	10.167.105.255/32	10.167.105.255 – 10.167.105.255	10.167.105.255

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 →