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)10.149.172.0/22

network10.149.172.0/22

broadcast10.149.175.255

first host10.149.172.1

last host10.149.175.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.149.172.0/22

address00001010.10010101.10101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010101.10101100.00000000

broadcast00001010.10010101.10101111.11111111

green = network part, grey = host part

hex0x0a95ac00

decimal177581056

reverse dns0.172.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:ac00

/22 split into /32 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.149.172.0/32	10.149.172.0 – 10.149.172.0	10.149.172.0
2	10.149.172.1/32	10.149.172.1 – 10.149.172.1	10.149.172.1
3	10.149.172.2/32	10.149.172.2 – 10.149.172.2	10.149.172.2
4	10.149.172.3/32	10.149.172.3 – 10.149.172.3	10.149.172.3
5	10.149.172.4/32	10.149.172.4 – 10.149.172.4	10.149.172.4
6	10.149.172.5/32	10.149.172.5 – 10.149.172.5	10.149.172.5
7	10.149.172.6/32	10.149.172.6 – 10.149.172.6	10.149.172.6
8	10.149.172.7/32	10.149.172.7 – 10.149.172.7	10.149.172.7
9	10.149.172.8/32	10.149.172.8 – 10.149.172.8	10.149.172.8
10	10.149.172.9/32	10.149.172.9 – 10.149.172.9	10.149.172.9
11	10.149.172.10/32	10.149.172.10 – 10.149.172.10	10.149.172.10
12	10.149.172.11/32	10.149.172.11 – 10.149.172.11	10.149.172.11
13	10.149.172.12/32	10.149.172.12 – 10.149.172.12	10.149.172.12
14	10.149.172.13/32	10.149.172.13 – 10.149.172.13	10.149.172.13
15	10.149.172.14/32	10.149.172.14 – 10.149.172.14	10.149.172.14
16	10.149.172.15/32	10.149.172.15 – 10.149.172.15	10.149.172.15
17	10.149.172.16/32	10.149.172.16 – 10.149.172.16	10.149.172.16
18	10.149.172.17/32	10.149.172.17 – 10.149.172.17	10.149.172.17
19	10.149.172.18/32	10.149.172.18 – 10.149.172.18	10.149.172.18
20	10.149.172.19/32	10.149.172.19 – 10.149.172.19	10.149.172.19
21	10.149.172.20/32	10.149.172.20 – 10.149.172.20	10.149.172.20
22	10.149.172.21/32	10.149.172.21 – 10.149.172.21	10.149.172.21
23	10.149.172.22/32	10.149.172.22 – 10.149.172.22	10.149.172.22
24	10.149.172.23/32	10.149.172.23 – 10.149.172.23	10.149.172.23
25	10.149.172.24/32	10.149.172.24 – 10.149.172.24	10.149.172.24
26	10.149.172.25/32	10.149.172.25 – 10.149.172.25	10.149.172.25
27	10.149.172.26/32	10.149.172.26 – 10.149.172.26	10.149.172.26
28	10.149.172.27/32	10.149.172.27 – 10.149.172.27	10.149.172.27
29	10.149.172.28/32	10.149.172.28 – 10.149.172.28	10.149.172.28
30	10.149.172.29/32	10.149.172.29 – 10.149.172.29	10.149.172.29
31	10.149.172.30/32	10.149.172.30 – 10.149.172.30	10.149.172.30
32	10.149.172.31/32	10.149.172.31 – 10.149.172.31	10.149.172.31
33	10.149.172.32/32	10.149.172.32 – 10.149.172.32	10.149.172.32
34	10.149.172.33/32	10.149.172.33 – 10.149.172.33	10.149.172.33
35	10.149.172.34/32	10.149.172.34 – 10.149.172.34	10.149.172.34
36	10.149.172.35/32	10.149.172.35 – 10.149.172.35	10.149.172.35
37	10.149.172.36/32	10.149.172.36 – 10.149.172.36	10.149.172.36
38	10.149.172.37/32	10.149.172.37 – 10.149.172.37	10.149.172.37
39	10.149.172.38/32	10.149.172.38 – 10.149.172.38	10.149.172.38
40	10.149.172.39/32	10.149.172.39 – 10.149.172.39	10.149.172.39
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68	10.149.172.67/32	10.149.172.67 – 10.149.172.67	10.149.172.67
69	10.149.172.68/32	10.149.172.68 – 10.149.172.68	10.149.172.68
70	10.149.172.69/32	10.149.172.69 – 10.149.172.69	10.149.172.69
71	10.149.172.70/32	10.149.172.70 – 10.149.172.70	10.149.172.70
72	10.149.172.71/32	10.149.172.71 – 10.149.172.71	10.149.172.71
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78	10.149.172.77/32	10.149.172.77 – 10.149.172.77	10.149.172.77
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80	10.149.172.79/32	10.149.172.79 – 10.149.172.79	10.149.172.79
81	10.149.172.80/32	10.149.172.80 – 10.149.172.80	10.149.172.80
82	10.149.172.81/32	10.149.172.81 – 10.149.172.81	10.149.172.81
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100	10.149.172.99/32	10.149.172.99 – 10.149.172.99	10.149.172.99
101	10.149.172.100/32	10.149.172.100 – 10.149.172.100	10.149.172.100
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210	10.149.172.209/32	10.149.172.209 – 10.149.172.209	10.149.172.209
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212	10.149.172.211/32	10.149.172.211 – 10.149.172.211	10.149.172.211
213	10.149.172.212/32	10.149.172.212 – 10.149.172.212	10.149.172.212
214	10.149.172.213/32	10.149.172.213 – 10.149.172.213	10.149.172.213
215	10.149.172.214/32	10.149.172.214 – 10.149.172.214	10.149.172.214
216	10.149.172.215/32	10.149.172.215 – 10.149.172.215	10.149.172.215
217	10.149.172.216/32	10.149.172.216 – 10.149.172.216	10.149.172.216
218	10.149.172.217/32	10.149.172.217 – 10.149.172.217	10.149.172.217
219	10.149.172.218/32	10.149.172.218 – 10.149.172.218	10.149.172.218
220	10.149.172.219/32	10.149.172.219 – 10.149.172.219	10.149.172.219
221	10.149.172.220/32	10.149.172.220 – 10.149.172.220	10.149.172.220
222	10.149.172.221/32	10.149.172.221 – 10.149.172.221	10.149.172.221
223	10.149.172.222/32	10.149.172.222 – 10.149.172.222	10.149.172.222
224	10.149.172.223/32	10.149.172.223 – 10.149.172.223	10.149.172.223
225	10.149.172.224/32	10.149.172.224 – 10.149.172.224	10.149.172.224
226	10.149.172.225/32	10.149.172.225 – 10.149.172.225	10.149.172.225
227	10.149.172.226/32	10.149.172.226 – 10.149.172.226	10.149.172.226
228	10.149.172.227/32	10.149.172.227 – 10.149.172.227	10.149.172.227
229	10.149.172.228/32	10.149.172.228 – 10.149.172.228	10.149.172.228
230	10.149.172.229/32	10.149.172.229 – 10.149.172.229	10.149.172.229
231	10.149.172.230/32	10.149.172.230 – 10.149.172.230	10.149.172.230
232	10.149.172.231/32	10.149.172.231 – 10.149.172.231	10.149.172.231
233	10.149.172.232/32	10.149.172.232 – 10.149.172.232	10.149.172.232
234	10.149.172.233/32	10.149.172.233 – 10.149.172.233	10.149.172.233
235	10.149.172.234/32	10.149.172.234 – 10.149.172.234	10.149.172.234
236	10.149.172.235/32	10.149.172.235 – 10.149.172.235	10.149.172.235
237	10.149.172.236/32	10.149.172.236 – 10.149.172.236	10.149.172.236
238	10.149.172.237/32	10.149.172.237 – 10.149.172.237	10.149.172.237
239	10.149.172.238/32	10.149.172.238 – 10.149.172.238	10.149.172.238
240	10.149.172.239/32	10.149.172.239 – 10.149.172.239	10.149.172.239
241	10.149.172.240/32	10.149.172.240 – 10.149.172.240	10.149.172.240
242	10.149.172.241/32	10.149.172.241 – 10.149.172.241	10.149.172.241
243	10.149.172.242/32	10.149.172.242 – 10.149.172.242	10.149.172.242
244	10.149.172.243/32	10.149.172.243 – 10.149.172.243	10.149.172.243
245	10.149.172.244/32	10.149.172.244 – 10.149.172.244	10.149.172.244
246	10.149.172.245/32	10.149.172.245 – 10.149.172.245	10.149.172.245
247	10.149.172.246/32	10.149.172.246 – 10.149.172.246	10.149.172.246
248	10.149.172.247/32	10.149.172.247 – 10.149.172.247	10.149.172.247
249	10.149.172.248/32	10.149.172.248 – 10.149.172.248	10.149.172.248
250	10.149.172.249/32	10.149.172.249 – 10.149.172.249	10.149.172.249
251	10.149.172.250/32	10.149.172.250 – 10.149.172.250	10.149.172.250
252	10.149.172.251/32	10.149.172.251 – 10.149.172.251	10.149.172.251
253	10.149.172.252/32	10.149.172.252 – 10.149.172.252	10.149.172.252
254	10.149.172.253/32	10.149.172.253 – 10.149.172.253	10.149.172.253
255	10.149.172.254/32	10.149.172.254 – 10.149.172.254	10.149.172.254
256	10.149.172.255/32	10.149.172.255 – 10.149.172.255	10.149.172.255

showing 256 of 1,024

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →