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)10.167.213.0/25

network10.167.213.0/25

broadcast10.167.213.127

first host10.167.213.1

last host10.167.213.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.213.0/25

address00001010.10100111.11010101.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.11010101.00000000

broadcast00001010.10100111.11010101.01111111

green = network part, grey = host part

hex0x0aa7d500

decimal178771200

reverse dns0.213.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:d500

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.213.0/32	10.167.213.0 – 10.167.213.0	10.167.213.0
2	10.167.213.1/32	10.167.213.1 – 10.167.213.1	10.167.213.1
3	10.167.213.2/32	10.167.213.2 – 10.167.213.2	10.167.213.2
4	10.167.213.3/32	10.167.213.3 – 10.167.213.3	10.167.213.3
5	10.167.213.4/32	10.167.213.4 – 10.167.213.4	10.167.213.4
6	10.167.213.5/32	10.167.213.5 – 10.167.213.5	10.167.213.5
7	10.167.213.6/32	10.167.213.6 – 10.167.213.6	10.167.213.6
8	10.167.213.7/32	10.167.213.7 – 10.167.213.7	10.167.213.7
9	10.167.213.8/32	10.167.213.8 – 10.167.213.8	10.167.213.8
10	10.167.213.9/32	10.167.213.9 – 10.167.213.9	10.167.213.9
11	10.167.213.10/32	10.167.213.10 – 10.167.213.10	10.167.213.10
12	10.167.213.11/32	10.167.213.11 – 10.167.213.11	10.167.213.11
13	10.167.213.12/32	10.167.213.12 – 10.167.213.12	10.167.213.12
14	10.167.213.13/32	10.167.213.13 – 10.167.213.13	10.167.213.13
15	10.167.213.14/32	10.167.213.14 – 10.167.213.14	10.167.213.14
16	10.167.213.15/32	10.167.213.15 – 10.167.213.15	10.167.213.15
17	10.167.213.16/32	10.167.213.16 – 10.167.213.16	10.167.213.16
18	10.167.213.17/32	10.167.213.17 – 10.167.213.17	10.167.213.17
19	10.167.213.18/32	10.167.213.18 – 10.167.213.18	10.167.213.18
20	10.167.213.19/32	10.167.213.19 – 10.167.213.19	10.167.213.19
21	10.167.213.20/32	10.167.213.20 – 10.167.213.20	10.167.213.20
22	10.167.213.21/32	10.167.213.21 – 10.167.213.21	10.167.213.21
23	10.167.213.22/32	10.167.213.22 – 10.167.213.22	10.167.213.22
24	10.167.213.23/32	10.167.213.23 – 10.167.213.23	10.167.213.23
25	10.167.213.24/32	10.167.213.24 – 10.167.213.24	10.167.213.24
26	10.167.213.25/32	10.167.213.25 – 10.167.213.25	10.167.213.25
27	10.167.213.26/32	10.167.213.26 – 10.167.213.26	10.167.213.26
28	10.167.213.27/32	10.167.213.27 – 10.167.213.27	10.167.213.27
29	10.167.213.28/32	10.167.213.28 – 10.167.213.28	10.167.213.28
30	10.167.213.29/32	10.167.213.29 – 10.167.213.29	10.167.213.29
31	10.167.213.30/32	10.167.213.30 – 10.167.213.30	10.167.213.30
32	10.167.213.31/32	10.167.213.31 – 10.167.213.31	10.167.213.31
33	10.167.213.32/32	10.167.213.32 – 10.167.213.32	10.167.213.32
34	10.167.213.33/32	10.167.213.33 – 10.167.213.33	10.167.213.33
35	10.167.213.34/32	10.167.213.34 – 10.167.213.34	10.167.213.34
36	10.167.213.35/32	10.167.213.35 – 10.167.213.35	10.167.213.35
37	10.167.213.36/32	10.167.213.36 – 10.167.213.36	10.167.213.36
38	10.167.213.37/32	10.167.213.37 – 10.167.213.37	10.167.213.37
39	10.167.213.38/32	10.167.213.38 – 10.167.213.38	10.167.213.38
40	10.167.213.39/32	10.167.213.39 – 10.167.213.39	10.167.213.39
41	10.167.213.40/32	10.167.213.40 – 10.167.213.40	10.167.213.40
42	10.167.213.41/32	10.167.213.41 – 10.167.213.41	10.167.213.41
43	10.167.213.42/32	10.167.213.42 – 10.167.213.42	10.167.213.42
44	10.167.213.43/32	10.167.213.43 – 10.167.213.43	10.167.213.43
45	10.167.213.44/32	10.167.213.44 – 10.167.213.44	10.167.213.44
46	10.167.213.45/32	10.167.213.45 – 10.167.213.45	10.167.213.45
47	10.167.213.46/32	10.167.213.46 – 10.167.213.46	10.167.213.46
48	10.167.213.47/32	10.167.213.47 – 10.167.213.47	10.167.213.47
49	10.167.213.48/32	10.167.213.48 – 10.167.213.48	10.167.213.48
50	10.167.213.49/32	10.167.213.49 – 10.167.213.49	10.167.213.49
51	10.167.213.50/32	10.167.213.50 – 10.167.213.50	10.167.213.50
52	10.167.213.51/32	10.167.213.51 – 10.167.213.51	10.167.213.51
53	10.167.213.52/32	10.167.213.52 – 10.167.213.52	10.167.213.52
54	10.167.213.53/32	10.167.213.53 – 10.167.213.53	10.167.213.53
55	10.167.213.54/32	10.167.213.54 – 10.167.213.54	10.167.213.54
56	10.167.213.55/32	10.167.213.55 – 10.167.213.55	10.167.213.55
57	10.167.213.56/32	10.167.213.56 – 10.167.213.56	10.167.213.56
58	10.167.213.57/32	10.167.213.57 – 10.167.213.57	10.167.213.57
59	10.167.213.58/32	10.167.213.58 – 10.167.213.58	10.167.213.58
60	10.167.213.59/32	10.167.213.59 – 10.167.213.59	10.167.213.59
61	10.167.213.60/32	10.167.213.60 – 10.167.213.60	10.167.213.60
62	10.167.213.61/32	10.167.213.61 – 10.167.213.61	10.167.213.61
63	10.167.213.62/32	10.167.213.62 – 10.167.213.62	10.167.213.62
64	10.167.213.63/32	10.167.213.63 – 10.167.213.63	10.167.213.63
65	10.167.213.64/32	10.167.213.64 – 10.167.213.64	10.167.213.64
66	10.167.213.65/32	10.167.213.65 – 10.167.213.65	10.167.213.65
67	10.167.213.66/32	10.167.213.66 – 10.167.213.66	10.167.213.66
68	10.167.213.67/32	10.167.213.67 – 10.167.213.67	10.167.213.67
69	10.167.213.68/32	10.167.213.68 – 10.167.213.68	10.167.213.68
70	10.167.213.69/32	10.167.213.69 – 10.167.213.69	10.167.213.69
71	10.167.213.70/32	10.167.213.70 – 10.167.213.70	10.167.213.70
72	10.167.213.71/32	10.167.213.71 – 10.167.213.71	10.167.213.71
73	10.167.213.72/32	10.167.213.72 – 10.167.213.72	10.167.213.72
74	10.167.213.73/32	10.167.213.73 – 10.167.213.73	10.167.213.73
75	10.167.213.74/32	10.167.213.74 – 10.167.213.74	10.167.213.74
76	10.167.213.75/32	10.167.213.75 – 10.167.213.75	10.167.213.75
77	10.167.213.76/32	10.167.213.76 – 10.167.213.76	10.167.213.76
78	10.167.213.77/32	10.167.213.77 – 10.167.213.77	10.167.213.77
79	10.167.213.78/32	10.167.213.78 – 10.167.213.78	10.167.213.78
80	10.167.213.79/32	10.167.213.79 – 10.167.213.79	10.167.213.79
81	10.167.213.80/32	10.167.213.80 – 10.167.213.80	10.167.213.80
82	10.167.213.81/32	10.167.213.81 – 10.167.213.81	10.167.213.81
83	10.167.213.82/32	10.167.213.82 – 10.167.213.82	10.167.213.82
84	10.167.213.83/32	10.167.213.83 – 10.167.213.83	10.167.213.83
85	10.167.213.84/32	10.167.213.84 – 10.167.213.84	10.167.213.84
86	10.167.213.85/32	10.167.213.85 – 10.167.213.85	10.167.213.85
87	10.167.213.86/32	10.167.213.86 – 10.167.213.86	10.167.213.86
88	10.167.213.87/32	10.167.213.87 – 10.167.213.87	10.167.213.87
89	10.167.213.88/32	10.167.213.88 – 10.167.213.88	10.167.213.88
90	10.167.213.89/32	10.167.213.89 – 10.167.213.89	10.167.213.89
91	10.167.213.90/32	10.167.213.90 – 10.167.213.90	10.167.213.90
92	10.167.213.91/32	10.167.213.91 – 10.167.213.91	10.167.213.91
93	10.167.213.92/32	10.167.213.92 – 10.167.213.92	10.167.213.92
94	10.167.213.93/32	10.167.213.93 – 10.167.213.93	10.167.213.93
95	10.167.213.94/32	10.167.213.94 – 10.167.213.94	10.167.213.94
96	10.167.213.95/32	10.167.213.95 – 10.167.213.95	10.167.213.95
97	10.167.213.96/32	10.167.213.96 – 10.167.213.96	10.167.213.96
98	10.167.213.97/32	10.167.213.97 – 10.167.213.97	10.167.213.97
99	10.167.213.98/32	10.167.213.98 – 10.167.213.98	10.167.213.98
100	10.167.213.99/32	10.167.213.99 – 10.167.213.99	10.167.213.99
101	10.167.213.100/32	10.167.213.100 – 10.167.213.100	10.167.213.100
102	10.167.213.101/32	10.167.213.101 – 10.167.213.101	10.167.213.101
103	10.167.213.102/32	10.167.213.102 – 10.167.213.102	10.167.213.102
104	10.167.213.103/32	10.167.213.103 – 10.167.213.103	10.167.213.103
105	10.167.213.104/32	10.167.213.104 – 10.167.213.104	10.167.213.104
106	10.167.213.105/32	10.167.213.105 – 10.167.213.105	10.167.213.105
107	10.167.213.106/32	10.167.213.106 – 10.167.213.106	10.167.213.106
108	10.167.213.107/32	10.167.213.107 – 10.167.213.107	10.167.213.107
109	10.167.213.108/32	10.167.213.108 – 10.167.213.108	10.167.213.108
110	10.167.213.109/32	10.167.213.109 – 10.167.213.109	10.167.213.109
111	10.167.213.110/32	10.167.213.110 – 10.167.213.110	10.167.213.110
112	10.167.213.111/32	10.167.213.111 – 10.167.213.111	10.167.213.111
113	10.167.213.112/32	10.167.213.112 – 10.167.213.112	10.167.213.112
114	10.167.213.113/32	10.167.213.113 – 10.167.213.113	10.167.213.113
115	10.167.213.114/32	10.167.213.114 – 10.167.213.114	10.167.213.114
116	10.167.213.115/32	10.167.213.115 – 10.167.213.115	10.167.213.115
117	10.167.213.116/32	10.167.213.116 – 10.167.213.116	10.167.213.116
118	10.167.213.117/32	10.167.213.117 – 10.167.213.117	10.167.213.117
119	10.167.213.118/32	10.167.213.118 – 10.167.213.118	10.167.213.118
120	10.167.213.119/32	10.167.213.119 – 10.167.213.119	10.167.213.119
121	10.167.213.120/32	10.167.213.120 – 10.167.213.120	10.167.213.120
122	10.167.213.121/32	10.167.213.121 – 10.167.213.121	10.167.213.121
123	10.167.213.122/32	10.167.213.122 – 10.167.213.122	10.167.213.122
124	10.167.213.123/32	10.167.213.123 – 10.167.213.123	10.167.213.123
125	10.167.213.124/32	10.167.213.124 – 10.167.213.124	10.167.213.124
126	10.167.213.125/32	10.167.213.125 – 10.167.213.125	10.167.213.125
127	10.167.213.126/32	10.167.213.126 – 10.167.213.126	10.167.213.126
128	10.167.213.127/32	10.167.213.127 – 10.167.213.127	10.167.213.127

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 →