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)10.167.227.0/25

network10.167.227.0/25

broadcast10.167.227.127

first host10.167.227.1

last host10.167.227.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.227.0/25

address00001010.10100111.11100011.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.11100011.00000000

broadcast00001010.10100111.11100011.01111111

green = network part, grey = host part

hex0x0aa7e300

decimal178774784

reverse dns0.227.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:e300

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.227.0/32	10.167.227.0 – 10.167.227.0	10.167.227.0
2	10.167.227.1/32	10.167.227.1 – 10.167.227.1	10.167.227.1
3	10.167.227.2/32	10.167.227.2 – 10.167.227.2	10.167.227.2
4	10.167.227.3/32	10.167.227.3 – 10.167.227.3	10.167.227.3
5	10.167.227.4/32	10.167.227.4 – 10.167.227.4	10.167.227.4
6	10.167.227.5/32	10.167.227.5 – 10.167.227.5	10.167.227.5
7	10.167.227.6/32	10.167.227.6 – 10.167.227.6	10.167.227.6
8	10.167.227.7/32	10.167.227.7 – 10.167.227.7	10.167.227.7
9	10.167.227.8/32	10.167.227.8 – 10.167.227.8	10.167.227.8
10	10.167.227.9/32	10.167.227.9 – 10.167.227.9	10.167.227.9
11	10.167.227.10/32	10.167.227.10 – 10.167.227.10	10.167.227.10
12	10.167.227.11/32	10.167.227.11 – 10.167.227.11	10.167.227.11
13	10.167.227.12/32	10.167.227.12 – 10.167.227.12	10.167.227.12
14	10.167.227.13/32	10.167.227.13 – 10.167.227.13	10.167.227.13
15	10.167.227.14/32	10.167.227.14 – 10.167.227.14	10.167.227.14
16	10.167.227.15/32	10.167.227.15 – 10.167.227.15	10.167.227.15
17	10.167.227.16/32	10.167.227.16 – 10.167.227.16	10.167.227.16
18	10.167.227.17/32	10.167.227.17 – 10.167.227.17	10.167.227.17
19	10.167.227.18/32	10.167.227.18 – 10.167.227.18	10.167.227.18
20	10.167.227.19/32	10.167.227.19 – 10.167.227.19	10.167.227.19
21	10.167.227.20/32	10.167.227.20 – 10.167.227.20	10.167.227.20
22	10.167.227.21/32	10.167.227.21 – 10.167.227.21	10.167.227.21
23	10.167.227.22/32	10.167.227.22 – 10.167.227.22	10.167.227.22
24	10.167.227.23/32	10.167.227.23 – 10.167.227.23	10.167.227.23
25	10.167.227.24/32	10.167.227.24 – 10.167.227.24	10.167.227.24
26	10.167.227.25/32	10.167.227.25 – 10.167.227.25	10.167.227.25
27	10.167.227.26/32	10.167.227.26 – 10.167.227.26	10.167.227.26
28	10.167.227.27/32	10.167.227.27 – 10.167.227.27	10.167.227.27
29	10.167.227.28/32	10.167.227.28 – 10.167.227.28	10.167.227.28
30	10.167.227.29/32	10.167.227.29 – 10.167.227.29	10.167.227.29
31	10.167.227.30/32	10.167.227.30 – 10.167.227.30	10.167.227.30
32	10.167.227.31/32	10.167.227.31 – 10.167.227.31	10.167.227.31
33	10.167.227.32/32	10.167.227.32 – 10.167.227.32	10.167.227.32
34	10.167.227.33/32	10.167.227.33 – 10.167.227.33	10.167.227.33
35	10.167.227.34/32	10.167.227.34 – 10.167.227.34	10.167.227.34
36	10.167.227.35/32	10.167.227.35 – 10.167.227.35	10.167.227.35
37	10.167.227.36/32	10.167.227.36 – 10.167.227.36	10.167.227.36
38	10.167.227.37/32	10.167.227.37 – 10.167.227.37	10.167.227.37
39	10.167.227.38/32	10.167.227.38 – 10.167.227.38	10.167.227.38
40	10.167.227.39/32	10.167.227.39 – 10.167.227.39	10.167.227.39
41	10.167.227.40/32	10.167.227.40 – 10.167.227.40	10.167.227.40
42	10.167.227.41/32	10.167.227.41 – 10.167.227.41	10.167.227.41
43	10.167.227.42/32	10.167.227.42 – 10.167.227.42	10.167.227.42
44	10.167.227.43/32	10.167.227.43 – 10.167.227.43	10.167.227.43
45	10.167.227.44/32	10.167.227.44 – 10.167.227.44	10.167.227.44
46	10.167.227.45/32	10.167.227.45 – 10.167.227.45	10.167.227.45
47	10.167.227.46/32	10.167.227.46 – 10.167.227.46	10.167.227.46
48	10.167.227.47/32	10.167.227.47 – 10.167.227.47	10.167.227.47
49	10.167.227.48/32	10.167.227.48 – 10.167.227.48	10.167.227.48
50	10.167.227.49/32	10.167.227.49 – 10.167.227.49	10.167.227.49
51	10.167.227.50/32	10.167.227.50 – 10.167.227.50	10.167.227.50
52	10.167.227.51/32	10.167.227.51 – 10.167.227.51	10.167.227.51
53	10.167.227.52/32	10.167.227.52 – 10.167.227.52	10.167.227.52
54	10.167.227.53/32	10.167.227.53 – 10.167.227.53	10.167.227.53
55	10.167.227.54/32	10.167.227.54 – 10.167.227.54	10.167.227.54
56	10.167.227.55/32	10.167.227.55 – 10.167.227.55	10.167.227.55
57	10.167.227.56/32	10.167.227.56 – 10.167.227.56	10.167.227.56
58	10.167.227.57/32	10.167.227.57 – 10.167.227.57	10.167.227.57
59	10.167.227.58/32	10.167.227.58 – 10.167.227.58	10.167.227.58
60	10.167.227.59/32	10.167.227.59 – 10.167.227.59	10.167.227.59
61	10.167.227.60/32	10.167.227.60 – 10.167.227.60	10.167.227.60
62	10.167.227.61/32	10.167.227.61 – 10.167.227.61	10.167.227.61
63	10.167.227.62/32	10.167.227.62 – 10.167.227.62	10.167.227.62
64	10.167.227.63/32	10.167.227.63 – 10.167.227.63	10.167.227.63
65	10.167.227.64/32	10.167.227.64 – 10.167.227.64	10.167.227.64
66	10.167.227.65/32	10.167.227.65 – 10.167.227.65	10.167.227.65
67	10.167.227.66/32	10.167.227.66 – 10.167.227.66	10.167.227.66
68	10.167.227.67/32	10.167.227.67 – 10.167.227.67	10.167.227.67
69	10.167.227.68/32	10.167.227.68 – 10.167.227.68	10.167.227.68
70	10.167.227.69/32	10.167.227.69 – 10.167.227.69	10.167.227.69
71	10.167.227.70/32	10.167.227.70 – 10.167.227.70	10.167.227.70
72	10.167.227.71/32	10.167.227.71 – 10.167.227.71	10.167.227.71
73	10.167.227.72/32	10.167.227.72 – 10.167.227.72	10.167.227.72
74	10.167.227.73/32	10.167.227.73 – 10.167.227.73	10.167.227.73
75	10.167.227.74/32	10.167.227.74 – 10.167.227.74	10.167.227.74
76	10.167.227.75/32	10.167.227.75 – 10.167.227.75	10.167.227.75
77	10.167.227.76/32	10.167.227.76 – 10.167.227.76	10.167.227.76
78	10.167.227.77/32	10.167.227.77 – 10.167.227.77	10.167.227.77
79	10.167.227.78/32	10.167.227.78 – 10.167.227.78	10.167.227.78
80	10.167.227.79/32	10.167.227.79 – 10.167.227.79	10.167.227.79
81	10.167.227.80/32	10.167.227.80 – 10.167.227.80	10.167.227.80
82	10.167.227.81/32	10.167.227.81 – 10.167.227.81	10.167.227.81
83	10.167.227.82/32	10.167.227.82 – 10.167.227.82	10.167.227.82
84	10.167.227.83/32	10.167.227.83 – 10.167.227.83	10.167.227.83
85	10.167.227.84/32	10.167.227.84 – 10.167.227.84	10.167.227.84
86	10.167.227.85/32	10.167.227.85 – 10.167.227.85	10.167.227.85
87	10.167.227.86/32	10.167.227.86 – 10.167.227.86	10.167.227.86
88	10.167.227.87/32	10.167.227.87 – 10.167.227.87	10.167.227.87
89	10.167.227.88/32	10.167.227.88 – 10.167.227.88	10.167.227.88
90	10.167.227.89/32	10.167.227.89 – 10.167.227.89	10.167.227.89
91	10.167.227.90/32	10.167.227.90 – 10.167.227.90	10.167.227.90
92	10.167.227.91/32	10.167.227.91 – 10.167.227.91	10.167.227.91
93	10.167.227.92/32	10.167.227.92 – 10.167.227.92	10.167.227.92
94	10.167.227.93/32	10.167.227.93 – 10.167.227.93	10.167.227.93
95	10.167.227.94/32	10.167.227.94 – 10.167.227.94	10.167.227.94
96	10.167.227.95/32	10.167.227.95 – 10.167.227.95	10.167.227.95
97	10.167.227.96/32	10.167.227.96 – 10.167.227.96	10.167.227.96
98	10.167.227.97/32	10.167.227.97 – 10.167.227.97	10.167.227.97
99	10.167.227.98/32	10.167.227.98 – 10.167.227.98	10.167.227.98
100	10.167.227.99/32	10.167.227.99 – 10.167.227.99	10.167.227.99
101	10.167.227.100/32	10.167.227.100 – 10.167.227.100	10.167.227.100
102	10.167.227.101/32	10.167.227.101 – 10.167.227.101	10.167.227.101
103	10.167.227.102/32	10.167.227.102 – 10.167.227.102	10.167.227.102
104	10.167.227.103/32	10.167.227.103 – 10.167.227.103	10.167.227.103
105	10.167.227.104/32	10.167.227.104 – 10.167.227.104	10.167.227.104
106	10.167.227.105/32	10.167.227.105 – 10.167.227.105	10.167.227.105
107	10.167.227.106/32	10.167.227.106 – 10.167.227.106	10.167.227.106
108	10.167.227.107/32	10.167.227.107 – 10.167.227.107	10.167.227.107
109	10.167.227.108/32	10.167.227.108 – 10.167.227.108	10.167.227.108
110	10.167.227.109/32	10.167.227.109 – 10.167.227.109	10.167.227.109
111	10.167.227.110/32	10.167.227.110 – 10.167.227.110	10.167.227.110
112	10.167.227.111/32	10.167.227.111 – 10.167.227.111	10.167.227.111
113	10.167.227.112/32	10.167.227.112 – 10.167.227.112	10.167.227.112
114	10.167.227.113/32	10.167.227.113 – 10.167.227.113	10.167.227.113
115	10.167.227.114/32	10.167.227.114 – 10.167.227.114	10.167.227.114
116	10.167.227.115/32	10.167.227.115 – 10.167.227.115	10.167.227.115
117	10.167.227.116/32	10.167.227.116 – 10.167.227.116	10.167.227.116
118	10.167.227.117/32	10.167.227.117 – 10.167.227.117	10.167.227.117
119	10.167.227.118/32	10.167.227.118 – 10.167.227.118	10.167.227.118
120	10.167.227.119/32	10.167.227.119 – 10.167.227.119	10.167.227.119
121	10.167.227.120/32	10.167.227.120 – 10.167.227.120	10.167.227.120
122	10.167.227.121/32	10.167.227.121 – 10.167.227.121	10.167.227.121
123	10.167.227.122/32	10.167.227.122 – 10.167.227.122	10.167.227.122
124	10.167.227.123/32	10.167.227.123 – 10.167.227.123	10.167.227.123
125	10.167.227.124/32	10.167.227.124 – 10.167.227.124	10.167.227.124
126	10.167.227.125/32	10.167.227.125 – 10.167.227.125	10.167.227.125
127	10.167.227.126/32	10.167.227.126 – 10.167.227.126	10.167.227.126
128	10.167.227.127/32	10.167.227.127 – 10.167.227.127	10.167.227.127

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