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)10.167.43.192/26

network10.167.43.192/26

broadcast10.167.43.255

first host10.167.43.193

last host10.167.43.254

subnet mask255.255.255.192

wildcard0.0.0.63

addresses64

usable hosts62

classA

ipcalc 10.167.43.192/26

address00001010.10100111.00101011.11000000

subnet mask11111111.11111111.11111111.11000000

network00001010.10100111.00101011.11000000

broadcast00001010.10100111.00101011.11111111

green = network part, grey = host part

hex0x0aa72bc0

decimal178727872

reverse dns192.43.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:2bc0

/26 split into /32 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.43.192/32	10.167.43.192 – 10.167.43.192	10.167.43.192
2	10.167.43.193/32	10.167.43.193 – 10.167.43.193	10.167.43.193
3	10.167.43.194/32	10.167.43.194 – 10.167.43.194	10.167.43.194
4	10.167.43.195/32	10.167.43.195 – 10.167.43.195	10.167.43.195
5	10.167.43.196/32	10.167.43.196 – 10.167.43.196	10.167.43.196
6	10.167.43.197/32	10.167.43.197 – 10.167.43.197	10.167.43.197
7	10.167.43.198/32	10.167.43.198 – 10.167.43.198	10.167.43.198
8	10.167.43.199/32	10.167.43.199 – 10.167.43.199	10.167.43.199
9	10.167.43.200/32	10.167.43.200 – 10.167.43.200	10.167.43.200
10	10.167.43.201/32	10.167.43.201 – 10.167.43.201	10.167.43.201
11	10.167.43.202/32	10.167.43.202 – 10.167.43.202	10.167.43.202
12	10.167.43.203/32	10.167.43.203 – 10.167.43.203	10.167.43.203
13	10.167.43.204/32	10.167.43.204 – 10.167.43.204	10.167.43.204
14	10.167.43.205/32	10.167.43.205 – 10.167.43.205	10.167.43.205
15	10.167.43.206/32	10.167.43.206 – 10.167.43.206	10.167.43.206
16	10.167.43.207/32	10.167.43.207 – 10.167.43.207	10.167.43.207
17	10.167.43.208/32	10.167.43.208 – 10.167.43.208	10.167.43.208
18	10.167.43.209/32	10.167.43.209 – 10.167.43.209	10.167.43.209
19	10.167.43.210/32	10.167.43.210 – 10.167.43.210	10.167.43.210
20	10.167.43.211/32	10.167.43.211 – 10.167.43.211	10.167.43.211
21	10.167.43.212/32	10.167.43.212 – 10.167.43.212	10.167.43.212
22	10.167.43.213/32	10.167.43.213 – 10.167.43.213	10.167.43.213
23	10.167.43.214/32	10.167.43.214 – 10.167.43.214	10.167.43.214
24	10.167.43.215/32	10.167.43.215 – 10.167.43.215	10.167.43.215
25	10.167.43.216/32	10.167.43.216 – 10.167.43.216	10.167.43.216
26	10.167.43.217/32	10.167.43.217 – 10.167.43.217	10.167.43.217
27	10.167.43.218/32	10.167.43.218 – 10.167.43.218	10.167.43.218
28	10.167.43.219/32	10.167.43.219 – 10.167.43.219	10.167.43.219
29	10.167.43.220/32	10.167.43.220 – 10.167.43.220	10.167.43.220
30	10.167.43.221/32	10.167.43.221 – 10.167.43.221	10.167.43.221
31	10.167.43.222/32	10.167.43.222 – 10.167.43.222	10.167.43.222
32	10.167.43.223/32	10.167.43.223 – 10.167.43.223	10.167.43.223
33	10.167.43.224/32	10.167.43.224 – 10.167.43.224	10.167.43.224
34	10.167.43.225/32	10.167.43.225 – 10.167.43.225	10.167.43.225
35	10.167.43.226/32	10.167.43.226 – 10.167.43.226	10.167.43.226
36	10.167.43.227/32	10.167.43.227 – 10.167.43.227	10.167.43.227
37	10.167.43.228/32	10.167.43.228 – 10.167.43.228	10.167.43.228
38	10.167.43.229/32	10.167.43.229 – 10.167.43.229	10.167.43.229
39	10.167.43.230/32	10.167.43.230 – 10.167.43.230	10.167.43.230
40	10.167.43.231/32	10.167.43.231 – 10.167.43.231	10.167.43.231
41	10.167.43.232/32	10.167.43.232 – 10.167.43.232	10.167.43.232
42	10.167.43.233/32	10.167.43.233 – 10.167.43.233	10.167.43.233
43	10.167.43.234/32	10.167.43.234 – 10.167.43.234	10.167.43.234
44	10.167.43.235/32	10.167.43.235 – 10.167.43.235	10.167.43.235
45	10.167.43.236/32	10.167.43.236 – 10.167.43.236	10.167.43.236
46	10.167.43.237/32	10.167.43.237 – 10.167.43.237	10.167.43.237
47	10.167.43.238/32	10.167.43.238 – 10.167.43.238	10.167.43.238
48	10.167.43.239/32	10.167.43.239 – 10.167.43.239	10.167.43.239
49	10.167.43.240/32	10.167.43.240 – 10.167.43.240	10.167.43.240
50	10.167.43.241/32	10.167.43.241 – 10.167.43.241	10.167.43.241
51	10.167.43.242/32	10.167.43.242 – 10.167.43.242	10.167.43.242
52	10.167.43.243/32	10.167.43.243 – 10.167.43.243	10.167.43.243
53	10.167.43.244/32	10.167.43.244 – 10.167.43.244	10.167.43.244
54	10.167.43.245/32	10.167.43.245 – 10.167.43.245	10.167.43.245
55	10.167.43.246/32	10.167.43.246 – 10.167.43.246	10.167.43.246
56	10.167.43.247/32	10.167.43.247 – 10.167.43.247	10.167.43.247
57	10.167.43.248/32	10.167.43.248 – 10.167.43.248	10.167.43.248
58	10.167.43.249/32	10.167.43.249 – 10.167.43.249	10.167.43.249
59	10.167.43.250/32	10.167.43.250 – 10.167.43.250	10.167.43.250
60	10.167.43.251/32	10.167.43.251 – 10.167.43.251	10.167.43.251
61	10.167.43.252/32	10.167.43.252 – 10.167.43.252	10.167.43.252
62	10.167.43.253/32	10.167.43.253 – 10.167.43.253	10.167.43.253
63	10.167.43.254/32	10.167.43.254 – 10.167.43.254	10.167.43.254
64	10.167.43.255/32	10.167.43.255 – 10.167.43.255	10.167.43.255

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 →