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)10.167.141.0/25

network10.167.141.0/25

broadcast10.167.141.127

first host10.167.141.1

last host10.167.141.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.141.0/25

address00001010.10100111.10001101.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10001101.00000000

broadcast00001010.10100111.10001101.01111111

green = network part, grey = host part

hex0x0aa78d00

decimal178752768

reverse dns0.141.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:8d00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.141.0/32	10.167.141.0 – 10.167.141.0	10.167.141.0
2	10.167.141.1/32	10.167.141.1 – 10.167.141.1	10.167.141.1
3	10.167.141.2/32	10.167.141.2 – 10.167.141.2	10.167.141.2
4	10.167.141.3/32	10.167.141.3 – 10.167.141.3	10.167.141.3
5	10.167.141.4/32	10.167.141.4 – 10.167.141.4	10.167.141.4
6	10.167.141.5/32	10.167.141.5 – 10.167.141.5	10.167.141.5
7	10.167.141.6/32	10.167.141.6 – 10.167.141.6	10.167.141.6
8	10.167.141.7/32	10.167.141.7 – 10.167.141.7	10.167.141.7
9	10.167.141.8/32	10.167.141.8 – 10.167.141.8	10.167.141.8
10	10.167.141.9/32	10.167.141.9 – 10.167.141.9	10.167.141.9
11	10.167.141.10/32	10.167.141.10 – 10.167.141.10	10.167.141.10
12	10.167.141.11/32	10.167.141.11 – 10.167.141.11	10.167.141.11
13	10.167.141.12/32	10.167.141.12 – 10.167.141.12	10.167.141.12
14	10.167.141.13/32	10.167.141.13 – 10.167.141.13	10.167.141.13
15	10.167.141.14/32	10.167.141.14 – 10.167.141.14	10.167.141.14
16	10.167.141.15/32	10.167.141.15 – 10.167.141.15	10.167.141.15
17	10.167.141.16/32	10.167.141.16 – 10.167.141.16	10.167.141.16
18	10.167.141.17/32	10.167.141.17 – 10.167.141.17	10.167.141.17
19	10.167.141.18/32	10.167.141.18 – 10.167.141.18	10.167.141.18
20	10.167.141.19/32	10.167.141.19 – 10.167.141.19	10.167.141.19
21	10.167.141.20/32	10.167.141.20 – 10.167.141.20	10.167.141.20
22	10.167.141.21/32	10.167.141.21 – 10.167.141.21	10.167.141.21
23	10.167.141.22/32	10.167.141.22 – 10.167.141.22	10.167.141.22
24	10.167.141.23/32	10.167.141.23 – 10.167.141.23	10.167.141.23
25	10.167.141.24/32	10.167.141.24 – 10.167.141.24	10.167.141.24
26	10.167.141.25/32	10.167.141.25 – 10.167.141.25	10.167.141.25
27	10.167.141.26/32	10.167.141.26 – 10.167.141.26	10.167.141.26
28	10.167.141.27/32	10.167.141.27 – 10.167.141.27	10.167.141.27
29	10.167.141.28/32	10.167.141.28 – 10.167.141.28	10.167.141.28
30	10.167.141.29/32	10.167.141.29 – 10.167.141.29	10.167.141.29
31	10.167.141.30/32	10.167.141.30 – 10.167.141.30	10.167.141.30
32	10.167.141.31/32	10.167.141.31 – 10.167.141.31	10.167.141.31
33	10.167.141.32/32	10.167.141.32 – 10.167.141.32	10.167.141.32
34	10.167.141.33/32	10.167.141.33 – 10.167.141.33	10.167.141.33
35	10.167.141.34/32	10.167.141.34 – 10.167.141.34	10.167.141.34
36	10.167.141.35/32	10.167.141.35 – 10.167.141.35	10.167.141.35
37	10.167.141.36/32	10.167.141.36 – 10.167.141.36	10.167.141.36
38	10.167.141.37/32	10.167.141.37 – 10.167.141.37	10.167.141.37
39	10.167.141.38/32	10.167.141.38 – 10.167.141.38	10.167.141.38
40	10.167.141.39/32	10.167.141.39 – 10.167.141.39	10.167.141.39
41	10.167.141.40/32	10.167.141.40 – 10.167.141.40	10.167.141.40
42	10.167.141.41/32	10.167.141.41 – 10.167.141.41	10.167.141.41
43	10.167.141.42/32	10.167.141.42 – 10.167.141.42	10.167.141.42
44	10.167.141.43/32	10.167.141.43 – 10.167.141.43	10.167.141.43
45	10.167.141.44/32	10.167.141.44 – 10.167.141.44	10.167.141.44
46	10.167.141.45/32	10.167.141.45 – 10.167.141.45	10.167.141.45
47	10.167.141.46/32	10.167.141.46 – 10.167.141.46	10.167.141.46
48	10.167.141.47/32	10.167.141.47 – 10.167.141.47	10.167.141.47
49	10.167.141.48/32	10.167.141.48 – 10.167.141.48	10.167.141.48
50	10.167.141.49/32	10.167.141.49 – 10.167.141.49	10.167.141.49
51	10.167.141.50/32	10.167.141.50 – 10.167.141.50	10.167.141.50
52	10.167.141.51/32	10.167.141.51 – 10.167.141.51	10.167.141.51
53	10.167.141.52/32	10.167.141.52 – 10.167.141.52	10.167.141.52
54	10.167.141.53/32	10.167.141.53 – 10.167.141.53	10.167.141.53
55	10.167.141.54/32	10.167.141.54 – 10.167.141.54	10.167.141.54
56	10.167.141.55/32	10.167.141.55 – 10.167.141.55	10.167.141.55
57	10.167.141.56/32	10.167.141.56 – 10.167.141.56	10.167.141.56
58	10.167.141.57/32	10.167.141.57 – 10.167.141.57	10.167.141.57
59	10.167.141.58/32	10.167.141.58 – 10.167.141.58	10.167.141.58
60	10.167.141.59/32	10.167.141.59 – 10.167.141.59	10.167.141.59
61	10.167.141.60/32	10.167.141.60 – 10.167.141.60	10.167.141.60
62	10.167.141.61/32	10.167.141.61 – 10.167.141.61	10.167.141.61
63	10.167.141.62/32	10.167.141.62 – 10.167.141.62	10.167.141.62
64	10.167.141.63/32	10.167.141.63 – 10.167.141.63	10.167.141.63
65	10.167.141.64/32	10.167.141.64 – 10.167.141.64	10.167.141.64
66	10.167.141.65/32	10.167.141.65 – 10.167.141.65	10.167.141.65
67	10.167.141.66/32	10.167.141.66 – 10.167.141.66	10.167.141.66
68	10.167.141.67/32	10.167.141.67 – 10.167.141.67	10.167.141.67
69	10.167.141.68/32	10.167.141.68 – 10.167.141.68	10.167.141.68
70	10.167.141.69/32	10.167.141.69 – 10.167.141.69	10.167.141.69
71	10.167.141.70/32	10.167.141.70 – 10.167.141.70	10.167.141.70
72	10.167.141.71/32	10.167.141.71 – 10.167.141.71	10.167.141.71
73	10.167.141.72/32	10.167.141.72 – 10.167.141.72	10.167.141.72
74	10.167.141.73/32	10.167.141.73 – 10.167.141.73	10.167.141.73
75	10.167.141.74/32	10.167.141.74 – 10.167.141.74	10.167.141.74
76	10.167.141.75/32	10.167.141.75 – 10.167.141.75	10.167.141.75
77	10.167.141.76/32	10.167.141.76 – 10.167.141.76	10.167.141.76
78	10.167.141.77/32	10.167.141.77 – 10.167.141.77	10.167.141.77
79	10.167.141.78/32	10.167.141.78 – 10.167.141.78	10.167.141.78
80	10.167.141.79/32	10.167.141.79 – 10.167.141.79	10.167.141.79
81	10.167.141.80/32	10.167.141.80 – 10.167.141.80	10.167.141.80
82	10.167.141.81/32	10.167.141.81 – 10.167.141.81	10.167.141.81
83	10.167.141.82/32	10.167.141.82 – 10.167.141.82	10.167.141.82
84	10.167.141.83/32	10.167.141.83 – 10.167.141.83	10.167.141.83
85	10.167.141.84/32	10.167.141.84 – 10.167.141.84	10.167.141.84
86	10.167.141.85/32	10.167.141.85 – 10.167.141.85	10.167.141.85
87	10.167.141.86/32	10.167.141.86 – 10.167.141.86	10.167.141.86
88	10.167.141.87/32	10.167.141.87 – 10.167.141.87	10.167.141.87
89	10.167.141.88/32	10.167.141.88 – 10.167.141.88	10.167.141.88
90	10.167.141.89/32	10.167.141.89 – 10.167.141.89	10.167.141.89
91	10.167.141.90/32	10.167.141.90 – 10.167.141.90	10.167.141.90
92	10.167.141.91/32	10.167.141.91 – 10.167.141.91	10.167.141.91
93	10.167.141.92/32	10.167.141.92 – 10.167.141.92	10.167.141.92
94	10.167.141.93/32	10.167.141.93 – 10.167.141.93	10.167.141.93
95	10.167.141.94/32	10.167.141.94 – 10.167.141.94	10.167.141.94
96	10.167.141.95/32	10.167.141.95 – 10.167.141.95	10.167.141.95
97	10.167.141.96/32	10.167.141.96 – 10.167.141.96	10.167.141.96
98	10.167.141.97/32	10.167.141.97 – 10.167.141.97	10.167.141.97
99	10.167.141.98/32	10.167.141.98 – 10.167.141.98	10.167.141.98
100	10.167.141.99/32	10.167.141.99 – 10.167.141.99	10.167.141.99
101	10.167.141.100/32	10.167.141.100 – 10.167.141.100	10.167.141.100
102	10.167.141.101/32	10.167.141.101 – 10.167.141.101	10.167.141.101
103	10.167.141.102/32	10.167.141.102 – 10.167.141.102	10.167.141.102
104	10.167.141.103/32	10.167.141.103 – 10.167.141.103	10.167.141.103
105	10.167.141.104/32	10.167.141.104 – 10.167.141.104	10.167.141.104
106	10.167.141.105/32	10.167.141.105 – 10.167.141.105	10.167.141.105
107	10.167.141.106/32	10.167.141.106 – 10.167.141.106	10.167.141.106
108	10.167.141.107/32	10.167.141.107 – 10.167.141.107	10.167.141.107
109	10.167.141.108/32	10.167.141.108 – 10.167.141.108	10.167.141.108
110	10.167.141.109/32	10.167.141.109 – 10.167.141.109	10.167.141.109
111	10.167.141.110/32	10.167.141.110 – 10.167.141.110	10.167.141.110
112	10.167.141.111/32	10.167.141.111 – 10.167.141.111	10.167.141.111
113	10.167.141.112/32	10.167.141.112 – 10.167.141.112	10.167.141.112
114	10.167.141.113/32	10.167.141.113 – 10.167.141.113	10.167.141.113
115	10.167.141.114/32	10.167.141.114 – 10.167.141.114	10.167.141.114
116	10.167.141.115/32	10.167.141.115 – 10.167.141.115	10.167.141.115
117	10.167.141.116/32	10.167.141.116 – 10.167.141.116	10.167.141.116
118	10.167.141.117/32	10.167.141.117 – 10.167.141.117	10.167.141.117
119	10.167.141.118/32	10.167.141.118 – 10.167.141.118	10.167.141.118
120	10.167.141.119/32	10.167.141.119 – 10.167.141.119	10.167.141.119
121	10.167.141.120/32	10.167.141.120 – 10.167.141.120	10.167.141.120
122	10.167.141.121/32	10.167.141.121 – 10.167.141.121	10.167.141.121
123	10.167.141.122/32	10.167.141.122 – 10.167.141.122	10.167.141.122
124	10.167.141.123/32	10.167.141.123 – 10.167.141.123	10.167.141.123
125	10.167.141.124/32	10.167.141.124 – 10.167.141.124	10.167.141.124
126	10.167.141.125/32	10.167.141.125 – 10.167.141.125	10.167.141.125
127	10.167.141.126/32	10.167.141.126 – 10.167.141.126	10.167.141.126
128	10.167.141.127/32	10.167.141.127 – 10.167.141.127	10.167.141.127

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 →