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)10.167.144.0/25

network10.167.144.0/25

broadcast10.167.144.127

first host10.167.144.1

last host10.167.144.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.144.0/25

address00001010.10100111.10010000.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10010000.00000000

broadcast00001010.10100111.10010000.01111111

green = network part, grey = host part

hex0x0aa79000

decimal178753536

reverse dns0.144.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:9000

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.144.0/32	10.167.144.0 – 10.167.144.0	10.167.144.0
2	10.167.144.1/32	10.167.144.1 – 10.167.144.1	10.167.144.1
3	10.167.144.2/32	10.167.144.2 – 10.167.144.2	10.167.144.2
4	10.167.144.3/32	10.167.144.3 – 10.167.144.3	10.167.144.3
5	10.167.144.4/32	10.167.144.4 – 10.167.144.4	10.167.144.4
6	10.167.144.5/32	10.167.144.5 – 10.167.144.5	10.167.144.5
7	10.167.144.6/32	10.167.144.6 – 10.167.144.6	10.167.144.6
8	10.167.144.7/32	10.167.144.7 – 10.167.144.7	10.167.144.7
9	10.167.144.8/32	10.167.144.8 – 10.167.144.8	10.167.144.8
10	10.167.144.9/32	10.167.144.9 – 10.167.144.9	10.167.144.9
11	10.167.144.10/32	10.167.144.10 – 10.167.144.10	10.167.144.10
12	10.167.144.11/32	10.167.144.11 – 10.167.144.11	10.167.144.11
13	10.167.144.12/32	10.167.144.12 – 10.167.144.12	10.167.144.12
14	10.167.144.13/32	10.167.144.13 – 10.167.144.13	10.167.144.13
15	10.167.144.14/32	10.167.144.14 – 10.167.144.14	10.167.144.14
16	10.167.144.15/32	10.167.144.15 – 10.167.144.15	10.167.144.15
17	10.167.144.16/32	10.167.144.16 – 10.167.144.16	10.167.144.16
18	10.167.144.17/32	10.167.144.17 – 10.167.144.17	10.167.144.17
19	10.167.144.18/32	10.167.144.18 – 10.167.144.18	10.167.144.18
20	10.167.144.19/32	10.167.144.19 – 10.167.144.19	10.167.144.19
21	10.167.144.20/32	10.167.144.20 – 10.167.144.20	10.167.144.20
22	10.167.144.21/32	10.167.144.21 – 10.167.144.21	10.167.144.21
23	10.167.144.22/32	10.167.144.22 – 10.167.144.22	10.167.144.22
24	10.167.144.23/32	10.167.144.23 – 10.167.144.23	10.167.144.23
25	10.167.144.24/32	10.167.144.24 – 10.167.144.24	10.167.144.24
26	10.167.144.25/32	10.167.144.25 – 10.167.144.25	10.167.144.25
27	10.167.144.26/32	10.167.144.26 – 10.167.144.26	10.167.144.26
28	10.167.144.27/32	10.167.144.27 – 10.167.144.27	10.167.144.27
29	10.167.144.28/32	10.167.144.28 – 10.167.144.28	10.167.144.28
30	10.167.144.29/32	10.167.144.29 – 10.167.144.29	10.167.144.29
31	10.167.144.30/32	10.167.144.30 – 10.167.144.30	10.167.144.30
32	10.167.144.31/32	10.167.144.31 – 10.167.144.31	10.167.144.31
33	10.167.144.32/32	10.167.144.32 – 10.167.144.32	10.167.144.32
34	10.167.144.33/32	10.167.144.33 – 10.167.144.33	10.167.144.33
35	10.167.144.34/32	10.167.144.34 – 10.167.144.34	10.167.144.34
36	10.167.144.35/32	10.167.144.35 – 10.167.144.35	10.167.144.35
37	10.167.144.36/32	10.167.144.36 – 10.167.144.36	10.167.144.36
38	10.167.144.37/32	10.167.144.37 – 10.167.144.37	10.167.144.37
39	10.167.144.38/32	10.167.144.38 – 10.167.144.38	10.167.144.38
40	10.167.144.39/32	10.167.144.39 – 10.167.144.39	10.167.144.39
41	10.167.144.40/32	10.167.144.40 – 10.167.144.40	10.167.144.40
42	10.167.144.41/32	10.167.144.41 – 10.167.144.41	10.167.144.41
43	10.167.144.42/32	10.167.144.42 – 10.167.144.42	10.167.144.42
44	10.167.144.43/32	10.167.144.43 – 10.167.144.43	10.167.144.43
45	10.167.144.44/32	10.167.144.44 – 10.167.144.44	10.167.144.44
46	10.167.144.45/32	10.167.144.45 – 10.167.144.45	10.167.144.45
47	10.167.144.46/32	10.167.144.46 – 10.167.144.46	10.167.144.46
48	10.167.144.47/32	10.167.144.47 – 10.167.144.47	10.167.144.47
49	10.167.144.48/32	10.167.144.48 – 10.167.144.48	10.167.144.48
50	10.167.144.49/32	10.167.144.49 – 10.167.144.49	10.167.144.49
51	10.167.144.50/32	10.167.144.50 – 10.167.144.50	10.167.144.50
52	10.167.144.51/32	10.167.144.51 – 10.167.144.51	10.167.144.51
53	10.167.144.52/32	10.167.144.52 – 10.167.144.52	10.167.144.52
54	10.167.144.53/32	10.167.144.53 – 10.167.144.53	10.167.144.53
55	10.167.144.54/32	10.167.144.54 – 10.167.144.54	10.167.144.54
56	10.167.144.55/32	10.167.144.55 – 10.167.144.55	10.167.144.55
57	10.167.144.56/32	10.167.144.56 – 10.167.144.56	10.167.144.56
58	10.167.144.57/32	10.167.144.57 – 10.167.144.57	10.167.144.57
59	10.167.144.58/32	10.167.144.58 – 10.167.144.58	10.167.144.58
60	10.167.144.59/32	10.167.144.59 – 10.167.144.59	10.167.144.59
61	10.167.144.60/32	10.167.144.60 – 10.167.144.60	10.167.144.60
62	10.167.144.61/32	10.167.144.61 – 10.167.144.61	10.167.144.61
63	10.167.144.62/32	10.167.144.62 – 10.167.144.62	10.167.144.62
64	10.167.144.63/32	10.167.144.63 – 10.167.144.63	10.167.144.63
65	10.167.144.64/32	10.167.144.64 – 10.167.144.64	10.167.144.64
66	10.167.144.65/32	10.167.144.65 – 10.167.144.65	10.167.144.65
67	10.167.144.66/32	10.167.144.66 – 10.167.144.66	10.167.144.66
68	10.167.144.67/32	10.167.144.67 – 10.167.144.67	10.167.144.67
69	10.167.144.68/32	10.167.144.68 – 10.167.144.68	10.167.144.68
70	10.167.144.69/32	10.167.144.69 – 10.167.144.69	10.167.144.69
71	10.167.144.70/32	10.167.144.70 – 10.167.144.70	10.167.144.70
72	10.167.144.71/32	10.167.144.71 – 10.167.144.71	10.167.144.71
73	10.167.144.72/32	10.167.144.72 – 10.167.144.72	10.167.144.72
74	10.167.144.73/32	10.167.144.73 – 10.167.144.73	10.167.144.73
75	10.167.144.74/32	10.167.144.74 – 10.167.144.74	10.167.144.74
76	10.167.144.75/32	10.167.144.75 – 10.167.144.75	10.167.144.75
77	10.167.144.76/32	10.167.144.76 – 10.167.144.76	10.167.144.76
78	10.167.144.77/32	10.167.144.77 – 10.167.144.77	10.167.144.77
79	10.167.144.78/32	10.167.144.78 – 10.167.144.78	10.167.144.78
80	10.167.144.79/32	10.167.144.79 – 10.167.144.79	10.167.144.79
81	10.167.144.80/32	10.167.144.80 – 10.167.144.80	10.167.144.80
82	10.167.144.81/32	10.167.144.81 – 10.167.144.81	10.167.144.81
83	10.167.144.82/32	10.167.144.82 – 10.167.144.82	10.167.144.82
84	10.167.144.83/32	10.167.144.83 – 10.167.144.83	10.167.144.83
85	10.167.144.84/32	10.167.144.84 – 10.167.144.84	10.167.144.84
86	10.167.144.85/32	10.167.144.85 – 10.167.144.85	10.167.144.85
87	10.167.144.86/32	10.167.144.86 – 10.167.144.86	10.167.144.86
88	10.167.144.87/32	10.167.144.87 – 10.167.144.87	10.167.144.87
89	10.167.144.88/32	10.167.144.88 – 10.167.144.88	10.167.144.88
90	10.167.144.89/32	10.167.144.89 – 10.167.144.89	10.167.144.89
91	10.167.144.90/32	10.167.144.90 – 10.167.144.90	10.167.144.90
92	10.167.144.91/32	10.167.144.91 – 10.167.144.91	10.167.144.91
93	10.167.144.92/32	10.167.144.92 – 10.167.144.92	10.167.144.92
94	10.167.144.93/32	10.167.144.93 – 10.167.144.93	10.167.144.93
95	10.167.144.94/32	10.167.144.94 – 10.167.144.94	10.167.144.94
96	10.167.144.95/32	10.167.144.95 – 10.167.144.95	10.167.144.95
97	10.167.144.96/32	10.167.144.96 – 10.167.144.96	10.167.144.96
98	10.167.144.97/32	10.167.144.97 – 10.167.144.97	10.167.144.97
99	10.167.144.98/32	10.167.144.98 – 10.167.144.98	10.167.144.98
100	10.167.144.99/32	10.167.144.99 – 10.167.144.99	10.167.144.99
101	10.167.144.100/32	10.167.144.100 – 10.167.144.100	10.167.144.100
102	10.167.144.101/32	10.167.144.101 – 10.167.144.101	10.167.144.101
103	10.167.144.102/32	10.167.144.102 – 10.167.144.102	10.167.144.102
104	10.167.144.103/32	10.167.144.103 – 10.167.144.103	10.167.144.103
105	10.167.144.104/32	10.167.144.104 – 10.167.144.104	10.167.144.104
106	10.167.144.105/32	10.167.144.105 – 10.167.144.105	10.167.144.105
107	10.167.144.106/32	10.167.144.106 – 10.167.144.106	10.167.144.106
108	10.167.144.107/32	10.167.144.107 – 10.167.144.107	10.167.144.107
109	10.167.144.108/32	10.167.144.108 – 10.167.144.108	10.167.144.108
110	10.167.144.109/32	10.167.144.109 – 10.167.144.109	10.167.144.109
111	10.167.144.110/32	10.167.144.110 – 10.167.144.110	10.167.144.110
112	10.167.144.111/32	10.167.144.111 – 10.167.144.111	10.167.144.111
113	10.167.144.112/32	10.167.144.112 – 10.167.144.112	10.167.144.112
114	10.167.144.113/32	10.167.144.113 – 10.167.144.113	10.167.144.113
115	10.167.144.114/32	10.167.144.114 – 10.167.144.114	10.167.144.114
116	10.167.144.115/32	10.167.144.115 – 10.167.144.115	10.167.144.115
117	10.167.144.116/32	10.167.144.116 – 10.167.144.116	10.167.144.116
118	10.167.144.117/32	10.167.144.117 – 10.167.144.117	10.167.144.117
119	10.167.144.118/32	10.167.144.118 – 10.167.144.118	10.167.144.118
120	10.167.144.119/32	10.167.144.119 – 10.167.144.119	10.167.144.119
121	10.167.144.120/32	10.167.144.120 – 10.167.144.120	10.167.144.120
122	10.167.144.121/32	10.167.144.121 – 10.167.144.121	10.167.144.121
123	10.167.144.122/32	10.167.144.122 – 10.167.144.122	10.167.144.122
124	10.167.144.123/32	10.167.144.123 – 10.167.144.123	10.167.144.123
125	10.167.144.124/32	10.167.144.124 – 10.167.144.124	10.167.144.124
126	10.167.144.125/32	10.167.144.125 – 10.167.144.125	10.167.144.125
127	10.167.144.126/32	10.167.144.126 – 10.167.144.126	10.167.144.126
128	10.167.144.127/32	10.167.144.127 – 10.167.144.127	10.167.144.127

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 →