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)10.0.98.0/25

network10.0.98.0/25

broadcast10.0.98.127

first host10.0.98.1

last host10.0.98.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.0.98.0/25

address00001010.00000000.01100010.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000000.01100010.00000000

broadcast00001010.00000000.01100010.01111111

green = network part, grey = host part

hex0x0a006200

decimal167797248

reverse dns0.98.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:6200

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.98.0/32	10.0.98.0 – 10.0.98.0	10.0.98.0
2	10.0.98.1/32	10.0.98.1 – 10.0.98.1	10.0.98.1
3	10.0.98.2/32	10.0.98.2 – 10.0.98.2	10.0.98.2
4	10.0.98.3/32	10.0.98.3 – 10.0.98.3	10.0.98.3
5	10.0.98.4/32	10.0.98.4 – 10.0.98.4	10.0.98.4
6	10.0.98.5/32	10.0.98.5 – 10.0.98.5	10.0.98.5
7	10.0.98.6/32	10.0.98.6 – 10.0.98.6	10.0.98.6
8	10.0.98.7/32	10.0.98.7 – 10.0.98.7	10.0.98.7
9	10.0.98.8/32	10.0.98.8 – 10.0.98.8	10.0.98.8
10	10.0.98.9/32	10.0.98.9 – 10.0.98.9	10.0.98.9
11	10.0.98.10/32	10.0.98.10 – 10.0.98.10	10.0.98.10
12	10.0.98.11/32	10.0.98.11 – 10.0.98.11	10.0.98.11
13	10.0.98.12/32	10.0.98.12 – 10.0.98.12	10.0.98.12
14	10.0.98.13/32	10.0.98.13 – 10.0.98.13	10.0.98.13
15	10.0.98.14/32	10.0.98.14 – 10.0.98.14	10.0.98.14
16	10.0.98.15/32	10.0.98.15 – 10.0.98.15	10.0.98.15
17	10.0.98.16/32	10.0.98.16 – 10.0.98.16	10.0.98.16
18	10.0.98.17/32	10.0.98.17 – 10.0.98.17	10.0.98.17
19	10.0.98.18/32	10.0.98.18 – 10.0.98.18	10.0.98.18
20	10.0.98.19/32	10.0.98.19 – 10.0.98.19	10.0.98.19
21	10.0.98.20/32	10.0.98.20 – 10.0.98.20	10.0.98.20
22	10.0.98.21/32	10.0.98.21 – 10.0.98.21	10.0.98.21
23	10.0.98.22/32	10.0.98.22 – 10.0.98.22	10.0.98.22
24	10.0.98.23/32	10.0.98.23 – 10.0.98.23	10.0.98.23
25	10.0.98.24/32	10.0.98.24 – 10.0.98.24	10.0.98.24
26	10.0.98.25/32	10.0.98.25 – 10.0.98.25	10.0.98.25
27	10.0.98.26/32	10.0.98.26 – 10.0.98.26	10.0.98.26
28	10.0.98.27/32	10.0.98.27 – 10.0.98.27	10.0.98.27
29	10.0.98.28/32	10.0.98.28 – 10.0.98.28	10.0.98.28
30	10.0.98.29/32	10.0.98.29 – 10.0.98.29	10.0.98.29
31	10.0.98.30/32	10.0.98.30 – 10.0.98.30	10.0.98.30
32	10.0.98.31/32	10.0.98.31 – 10.0.98.31	10.0.98.31
33	10.0.98.32/32	10.0.98.32 – 10.0.98.32	10.0.98.32
34	10.0.98.33/32	10.0.98.33 – 10.0.98.33	10.0.98.33
35	10.0.98.34/32	10.0.98.34 – 10.0.98.34	10.0.98.34
36	10.0.98.35/32	10.0.98.35 – 10.0.98.35	10.0.98.35
37	10.0.98.36/32	10.0.98.36 – 10.0.98.36	10.0.98.36
38	10.0.98.37/32	10.0.98.37 – 10.0.98.37	10.0.98.37
39	10.0.98.38/32	10.0.98.38 – 10.0.98.38	10.0.98.38
40	10.0.98.39/32	10.0.98.39 – 10.0.98.39	10.0.98.39
41	10.0.98.40/32	10.0.98.40 – 10.0.98.40	10.0.98.40
42	10.0.98.41/32	10.0.98.41 – 10.0.98.41	10.0.98.41
43	10.0.98.42/32	10.0.98.42 – 10.0.98.42	10.0.98.42
44	10.0.98.43/32	10.0.98.43 – 10.0.98.43	10.0.98.43
45	10.0.98.44/32	10.0.98.44 – 10.0.98.44	10.0.98.44
46	10.0.98.45/32	10.0.98.45 – 10.0.98.45	10.0.98.45
47	10.0.98.46/32	10.0.98.46 – 10.0.98.46	10.0.98.46
48	10.0.98.47/32	10.0.98.47 – 10.0.98.47	10.0.98.47
49	10.0.98.48/32	10.0.98.48 – 10.0.98.48	10.0.98.48
50	10.0.98.49/32	10.0.98.49 – 10.0.98.49	10.0.98.49
51	10.0.98.50/32	10.0.98.50 – 10.0.98.50	10.0.98.50
52	10.0.98.51/32	10.0.98.51 – 10.0.98.51	10.0.98.51
53	10.0.98.52/32	10.0.98.52 – 10.0.98.52	10.0.98.52
54	10.0.98.53/32	10.0.98.53 – 10.0.98.53	10.0.98.53
55	10.0.98.54/32	10.0.98.54 – 10.0.98.54	10.0.98.54
56	10.0.98.55/32	10.0.98.55 – 10.0.98.55	10.0.98.55
57	10.0.98.56/32	10.0.98.56 – 10.0.98.56	10.0.98.56
58	10.0.98.57/32	10.0.98.57 – 10.0.98.57	10.0.98.57
59	10.0.98.58/32	10.0.98.58 – 10.0.98.58	10.0.98.58
60	10.0.98.59/32	10.0.98.59 – 10.0.98.59	10.0.98.59
61	10.0.98.60/32	10.0.98.60 – 10.0.98.60	10.0.98.60
62	10.0.98.61/32	10.0.98.61 – 10.0.98.61	10.0.98.61
63	10.0.98.62/32	10.0.98.62 – 10.0.98.62	10.0.98.62
64	10.0.98.63/32	10.0.98.63 – 10.0.98.63	10.0.98.63
65	10.0.98.64/32	10.0.98.64 – 10.0.98.64	10.0.98.64
66	10.0.98.65/32	10.0.98.65 – 10.0.98.65	10.0.98.65
67	10.0.98.66/32	10.0.98.66 – 10.0.98.66	10.0.98.66
68	10.0.98.67/32	10.0.98.67 – 10.0.98.67	10.0.98.67
69	10.0.98.68/32	10.0.98.68 – 10.0.98.68	10.0.98.68
70	10.0.98.69/32	10.0.98.69 – 10.0.98.69	10.0.98.69
71	10.0.98.70/32	10.0.98.70 – 10.0.98.70	10.0.98.70
72	10.0.98.71/32	10.0.98.71 – 10.0.98.71	10.0.98.71
73	10.0.98.72/32	10.0.98.72 – 10.0.98.72	10.0.98.72
74	10.0.98.73/32	10.0.98.73 – 10.0.98.73	10.0.98.73
75	10.0.98.74/32	10.0.98.74 – 10.0.98.74	10.0.98.74
76	10.0.98.75/32	10.0.98.75 – 10.0.98.75	10.0.98.75
77	10.0.98.76/32	10.0.98.76 – 10.0.98.76	10.0.98.76
78	10.0.98.77/32	10.0.98.77 – 10.0.98.77	10.0.98.77
79	10.0.98.78/32	10.0.98.78 – 10.0.98.78	10.0.98.78
80	10.0.98.79/32	10.0.98.79 – 10.0.98.79	10.0.98.79
81	10.0.98.80/32	10.0.98.80 – 10.0.98.80	10.0.98.80
82	10.0.98.81/32	10.0.98.81 – 10.0.98.81	10.0.98.81
83	10.0.98.82/32	10.0.98.82 – 10.0.98.82	10.0.98.82
84	10.0.98.83/32	10.0.98.83 – 10.0.98.83	10.0.98.83
85	10.0.98.84/32	10.0.98.84 – 10.0.98.84	10.0.98.84
86	10.0.98.85/32	10.0.98.85 – 10.0.98.85	10.0.98.85
87	10.0.98.86/32	10.0.98.86 – 10.0.98.86	10.0.98.86
88	10.0.98.87/32	10.0.98.87 – 10.0.98.87	10.0.98.87
89	10.0.98.88/32	10.0.98.88 – 10.0.98.88	10.0.98.88
90	10.0.98.89/32	10.0.98.89 – 10.0.98.89	10.0.98.89
91	10.0.98.90/32	10.0.98.90 – 10.0.98.90	10.0.98.90
92	10.0.98.91/32	10.0.98.91 – 10.0.98.91	10.0.98.91
93	10.0.98.92/32	10.0.98.92 – 10.0.98.92	10.0.98.92
94	10.0.98.93/32	10.0.98.93 – 10.0.98.93	10.0.98.93
95	10.0.98.94/32	10.0.98.94 – 10.0.98.94	10.0.98.94
96	10.0.98.95/32	10.0.98.95 – 10.0.98.95	10.0.98.95
97	10.0.98.96/32	10.0.98.96 – 10.0.98.96	10.0.98.96
98	10.0.98.97/32	10.0.98.97 – 10.0.98.97	10.0.98.97
99	10.0.98.98/32	10.0.98.98 – 10.0.98.98	10.0.98.98
100	10.0.98.99/32	10.0.98.99 – 10.0.98.99	10.0.98.99
101	10.0.98.100/32	10.0.98.100 – 10.0.98.100	10.0.98.100
102	10.0.98.101/32	10.0.98.101 – 10.0.98.101	10.0.98.101
103	10.0.98.102/32	10.0.98.102 – 10.0.98.102	10.0.98.102
104	10.0.98.103/32	10.0.98.103 – 10.0.98.103	10.0.98.103
105	10.0.98.104/32	10.0.98.104 – 10.0.98.104	10.0.98.104
106	10.0.98.105/32	10.0.98.105 – 10.0.98.105	10.0.98.105
107	10.0.98.106/32	10.0.98.106 – 10.0.98.106	10.0.98.106
108	10.0.98.107/32	10.0.98.107 – 10.0.98.107	10.0.98.107
109	10.0.98.108/32	10.0.98.108 – 10.0.98.108	10.0.98.108
110	10.0.98.109/32	10.0.98.109 – 10.0.98.109	10.0.98.109
111	10.0.98.110/32	10.0.98.110 – 10.0.98.110	10.0.98.110
112	10.0.98.111/32	10.0.98.111 – 10.0.98.111	10.0.98.111
113	10.0.98.112/32	10.0.98.112 – 10.0.98.112	10.0.98.112
114	10.0.98.113/32	10.0.98.113 – 10.0.98.113	10.0.98.113
115	10.0.98.114/32	10.0.98.114 – 10.0.98.114	10.0.98.114
116	10.0.98.115/32	10.0.98.115 – 10.0.98.115	10.0.98.115
117	10.0.98.116/32	10.0.98.116 – 10.0.98.116	10.0.98.116
118	10.0.98.117/32	10.0.98.117 – 10.0.98.117	10.0.98.117
119	10.0.98.118/32	10.0.98.118 – 10.0.98.118	10.0.98.118
120	10.0.98.119/32	10.0.98.119 – 10.0.98.119	10.0.98.119
121	10.0.98.120/32	10.0.98.120 – 10.0.98.120	10.0.98.120
122	10.0.98.121/32	10.0.98.121 – 10.0.98.121	10.0.98.121
123	10.0.98.122/32	10.0.98.122 – 10.0.98.122	10.0.98.122
124	10.0.98.123/32	10.0.98.123 – 10.0.98.123	10.0.98.123
125	10.0.98.124/32	10.0.98.124 – 10.0.98.124	10.0.98.124
126	10.0.98.125/32	10.0.98.125 – 10.0.98.125	10.0.98.125
127	10.0.98.126/32	10.0.98.126 – 10.0.98.126	10.0.98.126
128	10.0.98.127/32	10.0.98.127 – 10.0.98.127	10.0.98.127

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 →