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)10.2.169.0/25

network10.2.169.0/25

broadcast10.2.169.127

first host10.2.169.1

last host10.2.169.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.169.0/25

address00001010.00000010.10101001.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.10101001.00000000

broadcast00001010.00000010.10101001.01111111

green = network part, grey = host part

hex0x0a02a900

decimal167946496

reverse dns0.169.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a900

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.169.0/32	10.2.169.0 – 10.2.169.0	10.2.169.0
2	10.2.169.1/32	10.2.169.1 – 10.2.169.1	10.2.169.1
3	10.2.169.2/32	10.2.169.2 – 10.2.169.2	10.2.169.2
4	10.2.169.3/32	10.2.169.3 – 10.2.169.3	10.2.169.3
5	10.2.169.4/32	10.2.169.4 – 10.2.169.4	10.2.169.4
6	10.2.169.5/32	10.2.169.5 – 10.2.169.5	10.2.169.5
7	10.2.169.6/32	10.2.169.6 – 10.2.169.6	10.2.169.6
8	10.2.169.7/32	10.2.169.7 – 10.2.169.7	10.2.169.7
9	10.2.169.8/32	10.2.169.8 – 10.2.169.8	10.2.169.8
10	10.2.169.9/32	10.2.169.9 – 10.2.169.9	10.2.169.9
11	10.2.169.10/32	10.2.169.10 – 10.2.169.10	10.2.169.10
12	10.2.169.11/32	10.2.169.11 – 10.2.169.11	10.2.169.11
13	10.2.169.12/32	10.2.169.12 – 10.2.169.12	10.2.169.12
14	10.2.169.13/32	10.2.169.13 – 10.2.169.13	10.2.169.13
15	10.2.169.14/32	10.2.169.14 – 10.2.169.14	10.2.169.14
16	10.2.169.15/32	10.2.169.15 – 10.2.169.15	10.2.169.15
17	10.2.169.16/32	10.2.169.16 – 10.2.169.16	10.2.169.16
18	10.2.169.17/32	10.2.169.17 – 10.2.169.17	10.2.169.17
19	10.2.169.18/32	10.2.169.18 – 10.2.169.18	10.2.169.18
20	10.2.169.19/32	10.2.169.19 – 10.2.169.19	10.2.169.19
21	10.2.169.20/32	10.2.169.20 – 10.2.169.20	10.2.169.20
22	10.2.169.21/32	10.2.169.21 – 10.2.169.21	10.2.169.21
23	10.2.169.22/32	10.2.169.22 – 10.2.169.22	10.2.169.22
24	10.2.169.23/32	10.2.169.23 – 10.2.169.23	10.2.169.23
25	10.2.169.24/32	10.2.169.24 – 10.2.169.24	10.2.169.24
26	10.2.169.25/32	10.2.169.25 – 10.2.169.25	10.2.169.25
27	10.2.169.26/32	10.2.169.26 – 10.2.169.26	10.2.169.26
28	10.2.169.27/32	10.2.169.27 – 10.2.169.27	10.2.169.27
29	10.2.169.28/32	10.2.169.28 – 10.2.169.28	10.2.169.28
30	10.2.169.29/32	10.2.169.29 – 10.2.169.29	10.2.169.29
31	10.2.169.30/32	10.2.169.30 – 10.2.169.30	10.2.169.30
32	10.2.169.31/32	10.2.169.31 – 10.2.169.31	10.2.169.31
33	10.2.169.32/32	10.2.169.32 – 10.2.169.32	10.2.169.32
34	10.2.169.33/32	10.2.169.33 – 10.2.169.33	10.2.169.33
35	10.2.169.34/32	10.2.169.34 – 10.2.169.34	10.2.169.34
36	10.2.169.35/32	10.2.169.35 – 10.2.169.35	10.2.169.35
37	10.2.169.36/32	10.2.169.36 – 10.2.169.36	10.2.169.36
38	10.2.169.37/32	10.2.169.37 – 10.2.169.37	10.2.169.37
39	10.2.169.38/32	10.2.169.38 – 10.2.169.38	10.2.169.38
40	10.2.169.39/32	10.2.169.39 – 10.2.169.39	10.2.169.39
41	10.2.169.40/32	10.2.169.40 – 10.2.169.40	10.2.169.40
42	10.2.169.41/32	10.2.169.41 – 10.2.169.41	10.2.169.41
43	10.2.169.42/32	10.2.169.42 – 10.2.169.42	10.2.169.42
44	10.2.169.43/32	10.2.169.43 – 10.2.169.43	10.2.169.43
45	10.2.169.44/32	10.2.169.44 – 10.2.169.44	10.2.169.44
46	10.2.169.45/32	10.2.169.45 – 10.2.169.45	10.2.169.45
47	10.2.169.46/32	10.2.169.46 – 10.2.169.46	10.2.169.46
48	10.2.169.47/32	10.2.169.47 – 10.2.169.47	10.2.169.47
49	10.2.169.48/32	10.2.169.48 – 10.2.169.48	10.2.169.48
50	10.2.169.49/32	10.2.169.49 – 10.2.169.49	10.2.169.49
51	10.2.169.50/32	10.2.169.50 – 10.2.169.50	10.2.169.50
52	10.2.169.51/32	10.2.169.51 – 10.2.169.51	10.2.169.51
53	10.2.169.52/32	10.2.169.52 – 10.2.169.52	10.2.169.52
54	10.2.169.53/32	10.2.169.53 – 10.2.169.53	10.2.169.53
55	10.2.169.54/32	10.2.169.54 – 10.2.169.54	10.2.169.54
56	10.2.169.55/32	10.2.169.55 – 10.2.169.55	10.2.169.55
57	10.2.169.56/32	10.2.169.56 – 10.2.169.56	10.2.169.56
58	10.2.169.57/32	10.2.169.57 – 10.2.169.57	10.2.169.57
59	10.2.169.58/32	10.2.169.58 – 10.2.169.58	10.2.169.58
60	10.2.169.59/32	10.2.169.59 – 10.2.169.59	10.2.169.59
61	10.2.169.60/32	10.2.169.60 – 10.2.169.60	10.2.169.60
62	10.2.169.61/32	10.2.169.61 – 10.2.169.61	10.2.169.61
63	10.2.169.62/32	10.2.169.62 – 10.2.169.62	10.2.169.62
64	10.2.169.63/32	10.2.169.63 – 10.2.169.63	10.2.169.63
65	10.2.169.64/32	10.2.169.64 – 10.2.169.64	10.2.169.64
66	10.2.169.65/32	10.2.169.65 – 10.2.169.65	10.2.169.65
67	10.2.169.66/32	10.2.169.66 – 10.2.169.66	10.2.169.66
68	10.2.169.67/32	10.2.169.67 – 10.2.169.67	10.2.169.67
69	10.2.169.68/32	10.2.169.68 – 10.2.169.68	10.2.169.68
70	10.2.169.69/32	10.2.169.69 – 10.2.169.69	10.2.169.69
71	10.2.169.70/32	10.2.169.70 – 10.2.169.70	10.2.169.70
72	10.2.169.71/32	10.2.169.71 – 10.2.169.71	10.2.169.71
73	10.2.169.72/32	10.2.169.72 – 10.2.169.72	10.2.169.72
74	10.2.169.73/32	10.2.169.73 – 10.2.169.73	10.2.169.73
75	10.2.169.74/32	10.2.169.74 – 10.2.169.74	10.2.169.74
76	10.2.169.75/32	10.2.169.75 – 10.2.169.75	10.2.169.75
77	10.2.169.76/32	10.2.169.76 – 10.2.169.76	10.2.169.76
78	10.2.169.77/32	10.2.169.77 – 10.2.169.77	10.2.169.77
79	10.2.169.78/32	10.2.169.78 – 10.2.169.78	10.2.169.78
80	10.2.169.79/32	10.2.169.79 – 10.2.169.79	10.2.169.79
81	10.2.169.80/32	10.2.169.80 – 10.2.169.80	10.2.169.80
82	10.2.169.81/32	10.2.169.81 – 10.2.169.81	10.2.169.81
83	10.2.169.82/32	10.2.169.82 – 10.2.169.82	10.2.169.82
84	10.2.169.83/32	10.2.169.83 – 10.2.169.83	10.2.169.83
85	10.2.169.84/32	10.2.169.84 – 10.2.169.84	10.2.169.84
86	10.2.169.85/32	10.2.169.85 – 10.2.169.85	10.2.169.85
87	10.2.169.86/32	10.2.169.86 – 10.2.169.86	10.2.169.86
88	10.2.169.87/32	10.2.169.87 – 10.2.169.87	10.2.169.87
89	10.2.169.88/32	10.2.169.88 – 10.2.169.88	10.2.169.88
90	10.2.169.89/32	10.2.169.89 – 10.2.169.89	10.2.169.89
91	10.2.169.90/32	10.2.169.90 – 10.2.169.90	10.2.169.90
92	10.2.169.91/32	10.2.169.91 – 10.2.169.91	10.2.169.91
93	10.2.169.92/32	10.2.169.92 – 10.2.169.92	10.2.169.92
94	10.2.169.93/32	10.2.169.93 – 10.2.169.93	10.2.169.93
95	10.2.169.94/32	10.2.169.94 – 10.2.169.94	10.2.169.94
96	10.2.169.95/32	10.2.169.95 – 10.2.169.95	10.2.169.95
97	10.2.169.96/32	10.2.169.96 – 10.2.169.96	10.2.169.96
98	10.2.169.97/32	10.2.169.97 – 10.2.169.97	10.2.169.97
99	10.2.169.98/32	10.2.169.98 – 10.2.169.98	10.2.169.98
100	10.2.169.99/32	10.2.169.99 – 10.2.169.99	10.2.169.99
101	10.2.169.100/32	10.2.169.100 – 10.2.169.100	10.2.169.100
102	10.2.169.101/32	10.2.169.101 – 10.2.169.101	10.2.169.101
103	10.2.169.102/32	10.2.169.102 – 10.2.169.102	10.2.169.102
104	10.2.169.103/32	10.2.169.103 – 10.2.169.103	10.2.169.103
105	10.2.169.104/32	10.2.169.104 – 10.2.169.104	10.2.169.104
106	10.2.169.105/32	10.2.169.105 – 10.2.169.105	10.2.169.105
107	10.2.169.106/32	10.2.169.106 – 10.2.169.106	10.2.169.106
108	10.2.169.107/32	10.2.169.107 – 10.2.169.107	10.2.169.107
109	10.2.169.108/32	10.2.169.108 – 10.2.169.108	10.2.169.108
110	10.2.169.109/32	10.2.169.109 – 10.2.169.109	10.2.169.109
111	10.2.169.110/32	10.2.169.110 – 10.2.169.110	10.2.169.110
112	10.2.169.111/32	10.2.169.111 – 10.2.169.111	10.2.169.111
113	10.2.169.112/32	10.2.169.112 – 10.2.169.112	10.2.169.112
114	10.2.169.113/32	10.2.169.113 – 10.2.169.113	10.2.169.113
115	10.2.169.114/32	10.2.169.114 – 10.2.169.114	10.2.169.114
116	10.2.169.115/32	10.2.169.115 – 10.2.169.115	10.2.169.115
117	10.2.169.116/32	10.2.169.116 – 10.2.169.116	10.2.169.116
118	10.2.169.117/32	10.2.169.117 – 10.2.169.117	10.2.169.117
119	10.2.169.118/32	10.2.169.118 – 10.2.169.118	10.2.169.118
120	10.2.169.119/32	10.2.169.119 – 10.2.169.119	10.2.169.119
121	10.2.169.120/32	10.2.169.120 – 10.2.169.120	10.2.169.120
122	10.2.169.121/32	10.2.169.121 – 10.2.169.121	10.2.169.121
123	10.2.169.122/32	10.2.169.122 – 10.2.169.122	10.2.169.122
124	10.2.169.123/32	10.2.169.123 – 10.2.169.123	10.2.169.123
125	10.2.169.124/32	10.2.169.124 – 10.2.169.124	10.2.169.124
126	10.2.169.125/32	10.2.169.125 – 10.2.169.125	10.2.169.125
127	10.2.169.126/32	10.2.169.126 – 10.2.169.126	10.2.169.126
128	10.2.169.127/32	10.2.169.127 – 10.2.169.127	10.2.169.127

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 →