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)10.167.179.0/25

network10.167.179.0/25

broadcast10.167.179.127

first host10.167.179.1

last host10.167.179.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.179.0/25

address00001010.10100111.10110011.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10110011.00000000

broadcast00001010.10100111.10110011.01111111

green = network part, grey = host part

hex0x0aa7b300

decimal178762496

reverse dns0.179.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:b300

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.179.0/32	10.167.179.0 – 10.167.179.0	10.167.179.0
2	10.167.179.1/32	10.167.179.1 – 10.167.179.1	10.167.179.1
3	10.167.179.2/32	10.167.179.2 – 10.167.179.2	10.167.179.2
4	10.167.179.3/32	10.167.179.3 – 10.167.179.3	10.167.179.3
5	10.167.179.4/32	10.167.179.4 – 10.167.179.4	10.167.179.4
6	10.167.179.5/32	10.167.179.5 – 10.167.179.5	10.167.179.5
7	10.167.179.6/32	10.167.179.6 – 10.167.179.6	10.167.179.6
8	10.167.179.7/32	10.167.179.7 – 10.167.179.7	10.167.179.7
9	10.167.179.8/32	10.167.179.8 – 10.167.179.8	10.167.179.8
10	10.167.179.9/32	10.167.179.9 – 10.167.179.9	10.167.179.9
11	10.167.179.10/32	10.167.179.10 – 10.167.179.10	10.167.179.10
12	10.167.179.11/32	10.167.179.11 – 10.167.179.11	10.167.179.11
13	10.167.179.12/32	10.167.179.12 – 10.167.179.12	10.167.179.12
14	10.167.179.13/32	10.167.179.13 – 10.167.179.13	10.167.179.13
15	10.167.179.14/32	10.167.179.14 – 10.167.179.14	10.167.179.14
16	10.167.179.15/32	10.167.179.15 – 10.167.179.15	10.167.179.15
17	10.167.179.16/32	10.167.179.16 – 10.167.179.16	10.167.179.16
18	10.167.179.17/32	10.167.179.17 – 10.167.179.17	10.167.179.17
19	10.167.179.18/32	10.167.179.18 – 10.167.179.18	10.167.179.18
20	10.167.179.19/32	10.167.179.19 – 10.167.179.19	10.167.179.19
21	10.167.179.20/32	10.167.179.20 – 10.167.179.20	10.167.179.20
22	10.167.179.21/32	10.167.179.21 – 10.167.179.21	10.167.179.21
23	10.167.179.22/32	10.167.179.22 – 10.167.179.22	10.167.179.22
24	10.167.179.23/32	10.167.179.23 – 10.167.179.23	10.167.179.23
25	10.167.179.24/32	10.167.179.24 – 10.167.179.24	10.167.179.24
26	10.167.179.25/32	10.167.179.25 – 10.167.179.25	10.167.179.25
27	10.167.179.26/32	10.167.179.26 – 10.167.179.26	10.167.179.26
28	10.167.179.27/32	10.167.179.27 – 10.167.179.27	10.167.179.27
29	10.167.179.28/32	10.167.179.28 – 10.167.179.28	10.167.179.28
30	10.167.179.29/32	10.167.179.29 – 10.167.179.29	10.167.179.29
31	10.167.179.30/32	10.167.179.30 – 10.167.179.30	10.167.179.30
32	10.167.179.31/32	10.167.179.31 – 10.167.179.31	10.167.179.31
33	10.167.179.32/32	10.167.179.32 – 10.167.179.32	10.167.179.32
34	10.167.179.33/32	10.167.179.33 – 10.167.179.33	10.167.179.33
35	10.167.179.34/32	10.167.179.34 – 10.167.179.34	10.167.179.34
36	10.167.179.35/32	10.167.179.35 – 10.167.179.35	10.167.179.35
37	10.167.179.36/32	10.167.179.36 – 10.167.179.36	10.167.179.36
38	10.167.179.37/32	10.167.179.37 – 10.167.179.37	10.167.179.37
39	10.167.179.38/32	10.167.179.38 – 10.167.179.38	10.167.179.38
40	10.167.179.39/32	10.167.179.39 – 10.167.179.39	10.167.179.39
41	10.167.179.40/32	10.167.179.40 – 10.167.179.40	10.167.179.40
42	10.167.179.41/32	10.167.179.41 – 10.167.179.41	10.167.179.41
43	10.167.179.42/32	10.167.179.42 – 10.167.179.42	10.167.179.42
44	10.167.179.43/32	10.167.179.43 – 10.167.179.43	10.167.179.43
45	10.167.179.44/32	10.167.179.44 – 10.167.179.44	10.167.179.44
46	10.167.179.45/32	10.167.179.45 – 10.167.179.45	10.167.179.45
47	10.167.179.46/32	10.167.179.46 – 10.167.179.46	10.167.179.46
48	10.167.179.47/32	10.167.179.47 – 10.167.179.47	10.167.179.47
49	10.167.179.48/32	10.167.179.48 – 10.167.179.48	10.167.179.48
50	10.167.179.49/32	10.167.179.49 – 10.167.179.49	10.167.179.49
51	10.167.179.50/32	10.167.179.50 – 10.167.179.50	10.167.179.50
52	10.167.179.51/32	10.167.179.51 – 10.167.179.51	10.167.179.51
53	10.167.179.52/32	10.167.179.52 – 10.167.179.52	10.167.179.52
54	10.167.179.53/32	10.167.179.53 – 10.167.179.53	10.167.179.53
55	10.167.179.54/32	10.167.179.54 – 10.167.179.54	10.167.179.54
56	10.167.179.55/32	10.167.179.55 – 10.167.179.55	10.167.179.55
57	10.167.179.56/32	10.167.179.56 – 10.167.179.56	10.167.179.56
58	10.167.179.57/32	10.167.179.57 – 10.167.179.57	10.167.179.57
59	10.167.179.58/32	10.167.179.58 – 10.167.179.58	10.167.179.58
60	10.167.179.59/32	10.167.179.59 – 10.167.179.59	10.167.179.59
61	10.167.179.60/32	10.167.179.60 – 10.167.179.60	10.167.179.60
62	10.167.179.61/32	10.167.179.61 – 10.167.179.61	10.167.179.61
63	10.167.179.62/32	10.167.179.62 – 10.167.179.62	10.167.179.62
64	10.167.179.63/32	10.167.179.63 – 10.167.179.63	10.167.179.63
65	10.167.179.64/32	10.167.179.64 – 10.167.179.64	10.167.179.64
66	10.167.179.65/32	10.167.179.65 – 10.167.179.65	10.167.179.65
67	10.167.179.66/32	10.167.179.66 – 10.167.179.66	10.167.179.66
68	10.167.179.67/32	10.167.179.67 – 10.167.179.67	10.167.179.67
69	10.167.179.68/32	10.167.179.68 – 10.167.179.68	10.167.179.68
70	10.167.179.69/32	10.167.179.69 – 10.167.179.69	10.167.179.69
71	10.167.179.70/32	10.167.179.70 – 10.167.179.70	10.167.179.70
72	10.167.179.71/32	10.167.179.71 – 10.167.179.71	10.167.179.71
73	10.167.179.72/32	10.167.179.72 – 10.167.179.72	10.167.179.72
74	10.167.179.73/32	10.167.179.73 – 10.167.179.73	10.167.179.73
75	10.167.179.74/32	10.167.179.74 – 10.167.179.74	10.167.179.74
76	10.167.179.75/32	10.167.179.75 – 10.167.179.75	10.167.179.75
77	10.167.179.76/32	10.167.179.76 – 10.167.179.76	10.167.179.76
78	10.167.179.77/32	10.167.179.77 – 10.167.179.77	10.167.179.77
79	10.167.179.78/32	10.167.179.78 – 10.167.179.78	10.167.179.78
80	10.167.179.79/32	10.167.179.79 – 10.167.179.79	10.167.179.79
81	10.167.179.80/32	10.167.179.80 – 10.167.179.80	10.167.179.80
82	10.167.179.81/32	10.167.179.81 – 10.167.179.81	10.167.179.81
83	10.167.179.82/32	10.167.179.82 – 10.167.179.82	10.167.179.82
84	10.167.179.83/32	10.167.179.83 – 10.167.179.83	10.167.179.83
85	10.167.179.84/32	10.167.179.84 – 10.167.179.84	10.167.179.84
86	10.167.179.85/32	10.167.179.85 – 10.167.179.85	10.167.179.85
87	10.167.179.86/32	10.167.179.86 – 10.167.179.86	10.167.179.86
88	10.167.179.87/32	10.167.179.87 – 10.167.179.87	10.167.179.87
89	10.167.179.88/32	10.167.179.88 – 10.167.179.88	10.167.179.88
90	10.167.179.89/32	10.167.179.89 – 10.167.179.89	10.167.179.89
91	10.167.179.90/32	10.167.179.90 – 10.167.179.90	10.167.179.90
92	10.167.179.91/32	10.167.179.91 – 10.167.179.91	10.167.179.91
93	10.167.179.92/32	10.167.179.92 – 10.167.179.92	10.167.179.92
94	10.167.179.93/32	10.167.179.93 – 10.167.179.93	10.167.179.93
95	10.167.179.94/32	10.167.179.94 – 10.167.179.94	10.167.179.94
96	10.167.179.95/32	10.167.179.95 – 10.167.179.95	10.167.179.95
97	10.167.179.96/32	10.167.179.96 – 10.167.179.96	10.167.179.96
98	10.167.179.97/32	10.167.179.97 – 10.167.179.97	10.167.179.97
99	10.167.179.98/32	10.167.179.98 – 10.167.179.98	10.167.179.98
100	10.167.179.99/32	10.167.179.99 – 10.167.179.99	10.167.179.99
101	10.167.179.100/32	10.167.179.100 – 10.167.179.100	10.167.179.100
102	10.167.179.101/32	10.167.179.101 – 10.167.179.101	10.167.179.101
103	10.167.179.102/32	10.167.179.102 – 10.167.179.102	10.167.179.102
104	10.167.179.103/32	10.167.179.103 – 10.167.179.103	10.167.179.103
105	10.167.179.104/32	10.167.179.104 – 10.167.179.104	10.167.179.104
106	10.167.179.105/32	10.167.179.105 – 10.167.179.105	10.167.179.105
107	10.167.179.106/32	10.167.179.106 – 10.167.179.106	10.167.179.106
108	10.167.179.107/32	10.167.179.107 – 10.167.179.107	10.167.179.107
109	10.167.179.108/32	10.167.179.108 – 10.167.179.108	10.167.179.108
110	10.167.179.109/32	10.167.179.109 – 10.167.179.109	10.167.179.109
111	10.167.179.110/32	10.167.179.110 – 10.167.179.110	10.167.179.110
112	10.167.179.111/32	10.167.179.111 – 10.167.179.111	10.167.179.111
113	10.167.179.112/32	10.167.179.112 – 10.167.179.112	10.167.179.112
114	10.167.179.113/32	10.167.179.113 – 10.167.179.113	10.167.179.113
115	10.167.179.114/32	10.167.179.114 – 10.167.179.114	10.167.179.114
116	10.167.179.115/32	10.167.179.115 – 10.167.179.115	10.167.179.115
117	10.167.179.116/32	10.167.179.116 – 10.167.179.116	10.167.179.116
118	10.167.179.117/32	10.167.179.117 – 10.167.179.117	10.167.179.117
119	10.167.179.118/32	10.167.179.118 – 10.167.179.118	10.167.179.118
120	10.167.179.119/32	10.167.179.119 – 10.167.179.119	10.167.179.119
121	10.167.179.120/32	10.167.179.120 – 10.167.179.120	10.167.179.120
122	10.167.179.121/32	10.167.179.121 – 10.167.179.121	10.167.179.121
123	10.167.179.122/32	10.167.179.122 – 10.167.179.122	10.167.179.122
124	10.167.179.123/32	10.167.179.123 – 10.167.179.123	10.167.179.123
125	10.167.179.124/32	10.167.179.124 – 10.167.179.124	10.167.179.124
126	10.167.179.125/32	10.167.179.125 – 10.167.179.125	10.167.179.125
127	10.167.179.126/32	10.167.179.126 – 10.167.179.126	10.167.179.126
128	10.167.179.127/32	10.167.179.127 – 10.167.179.127	10.167.179.127

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 →