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)10.167.194.0/25

network10.167.194.0/25

broadcast10.167.194.127

first host10.167.194.1

last host10.167.194.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.194.0/25

address00001010.10100111.11000010.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.11000010.00000000

broadcast00001010.10100111.11000010.01111111

green = network part, grey = host part

hex0x0aa7c200

decimal178766336

reverse dns0.194.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:c200

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.194.0/32	10.167.194.0 – 10.167.194.0	10.167.194.0
2	10.167.194.1/32	10.167.194.1 – 10.167.194.1	10.167.194.1
3	10.167.194.2/32	10.167.194.2 – 10.167.194.2	10.167.194.2
4	10.167.194.3/32	10.167.194.3 – 10.167.194.3	10.167.194.3
5	10.167.194.4/32	10.167.194.4 – 10.167.194.4	10.167.194.4
6	10.167.194.5/32	10.167.194.5 – 10.167.194.5	10.167.194.5
7	10.167.194.6/32	10.167.194.6 – 10.167.194.6	10.167.194.6
8	10.167.194.7/32	10.167.194.7 – 10.167.194.7	10.167.194.7
9	10.167.194.8/32	10.167.194.8 – 10.167.194.8	10.167.194.8
10	10.167.194.9/32	10.167.194.9 – 10.167.194.9	10.167.194.9
11	10.167.194.10/32	10.167.194.10 – 10.167.194.10	10.167.194.10
12	10.167.194.11/32	10.167.194.11 – 10.167.194.11	10.167.194.11
13	10.167.194.12/32	10.167.194.12 – 10.167.194.12	10.167.194.12
14	10.167.194.13/32	10.167.194.13 – 10.167.194.13	10.167.194.13
15	10.167.194.14/32	10.167.194.14 – 10.167.194.14	10.167.194.14
16	10.167.194.15/32	10.167.194.15 – 10.167.194.15	10.167.194.15
17	10.167.194.16/32	10.167.194.16 – 10.167.194.16	10.167.194.16
18	10.167.194.17/32	10.167.194.17 – 10.167.194.17	10.167.194.17
19	10.167.194.18/32	10.167.194.18 – 10.167.194.18	10.167.194.18
20	10.167.194.19/32	10.167.194.19 – 10.167.194.19	10.167.194.19
21	10.167.194.20/32	10.167.194.20 – 10.167.194.20	10.167.194.20
22	10.167.194.21/32	10.167.194.21 – 10.167.194.21	10.167.194.21
23	10.167.194.22/32	10.167.194.22 – 10.167.194.22	10.167.194.22
24	10.167.194.23/32	10.167.194.23 – 10.167.194.23	10.167.194.23
25	10.167.194.24/32	10.167.194.24 – 10.167.194.24	10.167.194.24
26	10.167.194.25/32	10.167.194.25 – 10.167.194.25	10.167.194.25
27	10.167.194.26/32	10.167.194.26 – 10.167.194.26	10.167.194.26
28	10.167.194.27/32	10.167.194.27 – 10.167.194.27	10.167.194.27
29	10.167.194.28/32	10.167.194.28 – 10.167.194.28	10.167.194.28
30	10.167.194.29/32	10.167.194.29 – 10.167.194.29	10.167.194.29
31	10.167.194.30/32	10.167.194.30 – 10.167.194.30	10.167.194.30
32	10.167.194.31/32	10.167.194.31 – 10.167.194.31	10.167.194.31
33	10.167.194.32/32	10.167.194.32 – 10.167.194.32	10.167.194.32
34	10.167.194.33/32	10.167.194.33 – 10.167.194.33	10.167.194.33
35	10.167.194.34/32	10.167.194.34 – 10.167.194.34	10.167.194.34
36	10.167.194.35/32	10.167.194.35 – 10.167.194.35	10.167.194.35
37	10.167.194.36/32	10.167.194.36 – 10.167.194.36	10.167.194.36
38	10.167.194.37/32	10.167.194.37 – 10.167.194.37	10.167.194.37
39	10.167.194.38/32	10.167.194.38 – 10.167.194.38	10.167.194.38
40	10.167.194.39/32	10.167.194.39 – 10.167.194.39	10.167.194.39
41	10.167.194.40/32	10.167.194.40 – 10.167.194.40	10.167.194.40
42	10.167.194.41/32	10.167.194.41 – 10.167.194.41	10.167.194.41
43	10.167.194.42/32	10.167.194.42 – 10.167.194.42	10.167.194.42
44	10.167.194.43/32	10.167.194.43 – 10.167.194.43	10.167.194.43
45	10.167.194.44/32	10.167.194.44 – 10.167.194.44	10.167.194.44
46	10.167.194.45/32	10.167.194.45 – 10.167.194.45	10.167.194.45
47	10.167.194.46/32	10.167.194.46 – 10.167.194.46	10.167.194.46
48	10.167.194.47/32	10.167.194.47 – 10.167.194.47	10.167.194.47
49	10.167.194.48/32	10.167.194.48 – 10.167.194.48	10.167.194.48
50	10.167.194.49/32	10.167.194.49 – 10.167.194.49	10.167.194.49
51	10.167.194.50/32	10.167.194.50 – 10.167.194.50	10.167.194.50
52	10.167.194.51/32	10.167.194.51 – 10.167.194.51	10.167.194.51
53	10.167.194.52/32	10.167.194.52 – 10.167.194.52	10.167.194.52
54	10.167.194.53/32	10.167.194.53 – 10.167.194.53	10.167.194.53
55	10.167.194.54/32	10.167.194.54 – 10.167.194.54	10.167.194.54
56	10.167.194.55/32	10.167.194.55 – 10.167.194.55	10.167.194.55
57	10.167.194.56/32	10.167.194.56 – 10.167.194.56	10.167.194.56
58	10.167.194.57/32	10.167.194.57 – 10.167.194.57	10.167.194.57
59	10.167.194.58/32	10.167.194.58 – 10.167.194.58	10.167.194.58
60	10.167.194.59/32	10.167.194.59 – 10.167.194.59	10.167.194.59
61	10.167.194.60/32	10.167.194.60 – 10.167.194.60	10.167.194.60
62	10.167.194.61/32	10.167.194.61 – 10.167.194.61	10.167.194.61
63	10.167.194.62/32	10.167.194.62 – 10.167.194.62	10.167.194.62
64	10.167.194.63/32	10.167.194.63 – 10.167.194.63	10.167.194.63
65	10.167.194.64/32	10.167.194.64 – 10.167.194.64	10.167.194.64
66	10.167.194.65/32	10.167.194.65 – 10.167.194.65	10.167.194.65
67	10.167.194.66/32	10.167.194.66 – 10.167.194.66	10.167.194.66
68	10.167.194.67/32	10.167.194.67 – 10.167.194.67	10.167.194.67
69	10.167.194.68/32	10.167.194.68 – 10.167.194.68	10.167.194.68
70	10.167.194.69/32	10.167.194.69 – 10.167.194.69	10.167.194.69
71	10.167.194.70/32	10.167.194.70 – 10.167.194.70	10.167.194.70
72	10.167.194.71/32	10.167.194.71 – 10.167.194.71	10.167.194.71
73	10.167.194.72/32	10.167.194.72 – 10.167.194.72	10.167.194.72
74	10.167.194.73/32	10.167.194.73 – 10.167.194.73	10.167.194.73
75	10.167.194.74/32	10.167.194.74 – 10.167.194.74	10.167.194.74
76	10.167.194.75/32	10.167.194.75 – 10.167.194.75	10.167.194.75
77	10.167.194.76/32	10.167.194.76 – 10.167.194.76	10.167.194.76
78	10.167.194.77/32	10.167.194.77 – 10.167.194.77	10.167.194.77
79	10.167.194.78/32	10.167.194.78 – 10.167.194.78	10.167.194.78
80	10.167.194.79/32	10.167.194.79 – 10.167.194.79	10.167.194.79
81	10.167.194.80/32	10.167.194.80 – 10.167.194.80	10.167.194.80
82	10.167.194.81/32	10.167.194.81 – 10.167.194.81	10.167.194.81
83	10.167.194.82/32	10.167.194.82 – 10.167.194.82	10.167.194.82
84	10.167.194.83/32	10.167.194.83 – 10.167.194.83	10.167.194.83
85	10.167.194.84/32	10.167.194.84 – 10.167.194.84	10.167.194.84
86	10.167.194.85/32	10.167.194.85 – 10.167.194.85	10.167.194.85
87	10.167.194.86/32	10.167.194.86 – 10.167.194.86	10.167.194.86
88	10.167.194.87/32	10.167.194.87 – 10.167.194.87	10.167.194.87
89	10.167.194.88/32	10.167.194.88 – 10.167.194.88	10.167.194.88
90	10.167.194.89/32	10.167.194.89 – 10.167.194.89	10.167.194.89
91	10.167.194.90/32	10.167.194.90 – 10.167.194.90	10.167.194.90
92	10.167.194.91/32	10.167.194.91 – 10.167.194.91	10.167.194.91
93	10.167.194.92/32	10.167.194.92 – 10.167.194.92	10.167.194.92
94	10.167.194.93/32	10.167.194.93 – 10.167.194.93	10.167.194.93
95	10.167.194.94/32	10.167.194.94 – 10.167.194.94	10.167.194.94
96	10.167.194.95/32	10.167.194.95 – 10.167.194.95	10.167.194.95
97	10.167.194.96/32	10.167.194.96 – 10.167.194.96	10.167.194.96
98	10.167.194.97/32	10.167.194.97 – 10.167.194.97	10.167.194.97
99	10.167.194.98/32	10.167.194.98 – 10.167.194.98	10.167.194.98
100	10.167.194.99/32	10.167.194.99 – 10.167.194.99	10.167.194.99
101	10.167.194.100/32	10.167.194.100 – 10.167.194.100	10.167.194.100
102	10.167.194.101/32	10.167.194.101 – 10.167.194.101	10.167.194.101
103	10.167.194.102/32	10.167.194.102 – 10.167.194.102	10.167.194.102
104	10.167.194.103/32	10.167.194.103 – 10.167.194.103	10.167.194.103
105	10.167.194.104/32	10.167.194.104 – 10.167.194.104	10.167.194.104
106	10.167.194.105/32	10.167.194.105 – 10.167.194.105	10.167.194.105
107	10.167.194.106/32	10.167.194.106 – 10.167.194.106	10.167.194.106
108	10.167.194.107/32	10.167.194.107 – 10.167.194.107	10.167.194.107
109	10.167.194.108/32	10.167.194.108 – 10.167.194.108	10.167.194.108
110	10.167.194.109/32	10.167.194.109 – 10.167.194.109	10.167.194.109
111	10.167.194.110/32	10.167.194.110 – 10.167.194.110	10.167.194.110
112	10.167.194.111/32	10.167.194.111 – 10.167.194.111	10.167.194.111
113	10.167.194.112/32	10.167.194.112 – 10.167.194.112	10.167.194.112
114	10.167.194.113/32	10.167.194.113 – 10.167.194.113	10.167.194.113
115	10.167.194.114/32	10.167.194.114 – 10.167.194.114	10.167.194.114
116	10.167.194.115/32	10.167.194.115 – 10.167.194.115	10.167.194.115
117	10.167.194.116/32	10.167.194.116 – 10.167.194.116	10.167.194.116
118	10.167.194.117/32	10.167.194.117 – 10.167.194.117	10.167.194.117
119	10.167.194.118/32	10.167.194.118 – 10.167.194.118	10.167.194.118
120	10.167.194.119/32	10.167.194.119 – 10.167.194.119	10.167.194.119
121	10.167.194.120/32	10.167.194.120 – 10.167.194.120	10.167.194.120
122	10.167.194.121/32	10.167.194.121 – 10.167.194.121	10.167.194.121
123	10.167.194.122/32	10.167.194.122 – 10.167.194.122	10.167.194.122
124	10.167.194.123/32	10.167.194.123 – 10.167.194.123	10.167.194.123
125	10.167.194.124/32	10.167.194.124 – 10.167.194.124	10.167.194.124
126	10.167.194.125/32	10.167.194.125 – 10.167.194.125	10.167.194.125
127	10.167.194.126/32	10.167.194.126 – 10.167.194.126	10.167.194.126
128	10.167.194.127/32	10.167.194.127 – 10.167.194.127	10.167.194.127

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 →