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)10.3.98.0/23

network10.3.98.0/23

broadcast10.3.99.255

first host10.3.98.1

last host10.3.99.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.98.0/23

address00001010.00000011.01100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.01100010.00000000

broadcast00001010.00000011.01100011.11111111

green = network part, grey = host part

hex0x0a036200

decimal167993856

reverse dns0.98.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:6200

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.98.0/30	10.3.98.1 – 10.3.98.2	10.3.98.3
2	10.3.98.4/30	10.3.98.5 – 10.3.98.6	10.3.98.7
3	10.3.98.8/30	10.3.98.9 – 10.3.98.10	10.3.98.11
4	10.3.98.12/30	10.3.98.13 – 10.3.98.14	10.3.98.15
5	10.3.98.16/30	10.3.98.17 – 10.3.98.18	10.3.98.19
6	10.3.98.20/30	10.3.98.21 – 10.3.98.22	10.3.98.23
7	10.3.98.24/30	10.3.98.25 – 10.3.98.26	10.3.98.27
8	10.3.98.28/30	10.3.98.29 – 10.3.98.30	10.3.98.31
9	10.3.98.32/30	10.3.98.33 – 10.3.98.34	10.3.98.35
10	10.3.98.36/30	10.3.98.37 – 10.3.98.38	10.3.98.39
11	10.3.98.40/30	10.3.98.41 – 10.3.98.42	10.3.98.43
12	10.3.98.44/30	10.3.98.45 – 10.3.98.46	10.3.98.47
13	10.3.98.48/30	10.3.98.49 – 10.3.98.50	10.3.98.51
14	10.3.98.52/30	10.3.98.53 – 10.3.98.54	10.3.98.55
15	10.3.98.56/30	10.3.98.57 – 10.3.98.58	10.3.98.59
16	10.3.98.60/30	10.3.98.61 – 10.3.98.62	10.3.98.63
17	10.3.98.64/30	10.3.98.65 – 10.3.98.66	10.3.98.67
18	10.3.98.68/30	10.3.98.69 – 10.3.98.70	10.3.98.71
19	10.3.98.72/30	10.3.98.73 – 10.3.98.74	10.3.98.75
20	10.3.98.76/30	10.3.98.77 – 10.3.98.78	10.3.98.79
21	10.3.98.80/30	10.3.98.81 – 10.3.98.82	10.3.98.83
22	10.3.98.84/30	10.3.98.85 – 10.3.98.86	10.3.98.87
23	10.3.98.88/30	10.3.98.89 – 10.3.98.90	10.3.98.91
24	10.3.98.92/30	10.3.98.93 – 10.3.98.94	10.3.98.95
25	10.3.98.96/30	10.3.98.97 – 10.3.98.98	10.3.98.99
26	10.3.98.100/30	10.3.98.101 – 10.3.98.102	10.3.98.103
27	10.3.98.104/30	10.3.98.105 – 10.3.98.106	10.3.98.107
28	10.3.98.108/30	10.3.98.109 – 10.3.98.110	10.3.98.111
29	10.3.98.112/30	10.3.98.113 – 10.3.98.114	10.3.98.115
30	10.3.98.116/30	10.3.98.117 – 10.3.98.118	10.3.98.119
31	10.3.98.120/30	10.3.98.121 – 10.3.98.122	10.3.98.123
32	10.3.98.124/30	10.3.98.125 – 10.3.98.126	10.3.98.127
33	10.3.98.128/30	10.3.98.129 – 10.3.98.130	10.3.98.131
34	10.3.98.132/30	10.3.98.133 – 10.3.98.134	10.3.98.135
35	10.3.98.136/30	10.3.98.137 – 10.3.98.138	10.3.98.139
36	10.3.98.140/30	10.3.98.141 – 10.3.98.142	10.3.98.143
37	10.3.98.144/30	10.3.98.145 – 10.3.98.146	10.3.98.147
38	10.3.98.148/30	10.3.98.149 – 10.3.98.150	10.3.98.151
39	10.3.98.152/30	10.3.98.153 – 10.3.98.154	10.3.98.155
40	10.3.98.156/30	10.3.98.157 – 10.3.98.158	10.3.98.159
41	10.3.98.160/30	10.3.98.161 – 10.3.98.162	10.3.98.163
42	10.3.98.164/30	10.3.98.165 – 10.3.98.166	10.3.98.167
43	10.3.98.168/30	10.3.98.169 – 10.3.98.170	10.3.98.171
44	10.3.98.172/30	10.3.98.173 – 10.3.98.174	10.3.98.175
45	10.3.98.176/30	10.3.98.177 – 10.3.98.178	10.3.98.179
46	10.3.98.180/30	10.3.98.181 – 10.3.98.182	10.3.98.183
47	10.3.98.184/30	10.3.98.185 – 10.3.98.186	10.3.98.187
48	10.3.98.188/30	10.3.98.189 – 10.3.98.190	10.3.98.191
49	10.3.98.192/30	10.3.98.193 – 10.3.98.194	10.3.98.195
50	10.3.98.196/30	10.3.98.197 – 10.3.98.198	10.3.98.199
51	10.3.98.200/30	10.3.98.201 – 10.3.98.202	10.3.98.203
52	10.3.98.204/30	10.3.98.205 – 10.3.98.206	10.3.98.207
53	10.3.98.208/30	10.3.98.209 – 10.3.98.210	10.3.98.211
54	10.3.98.212/30	10.3.98.213 – 10.3.98.214	10.3.98.215
55	10.3.98.216/30	10.3.98.217 – 10.3.98.218	10.3.98.219
56	10.3.98.220/30	10.3.98.221 – 10.3.98.222	10.3.98.223
57	10.3.98.224/30	10.3.98.225 – 10.3.98.226	10.3.98.227
58	10.3.98.228/30	10.3.98.229 – 10.3.98.230	10.3.98.231
59	10.3.98.232/30	10.3.98.233 – 10.3.98.234	10.3.98.235
60	10.3.98.236/30	10.3.98.237 – 10.3.98.238	10.3.98.239
61	10.3.98.240/30	10.3.98.241 – 10.3.98.242	10.3.98.243
62	10.3.98.244/30	10.3.98.245 – 10.3.98.246	10.3.98.247
63	10.3.98.248/30	10.3.98.249 – 10.3.98.250	10.3.98.251
64	10.3.98.252/30	10.3.98.253 – 10.3.98.254	10.3.98.255
65	10.3.99.0/30	10.3.99.1 – 10.3.99.2	10.3.99.3
66	10.3.99.4/30	10.3.99.5 – 10.3.99.6	10.3.99.7
67	10.3.99.8/30	10.3.99.9 – 10.3.99.10	10.3.99.11
68	10.3.99.12/30	10.3.99.13 – 10.3.99.14	10.3.99.15
69	10.3.99.16/30	10.3.99.17 – 10.3.99.18	10.3.99.19
70	10.3.99.20/30	10.3.99.21 – 10.3.99.22	10.3.99.23
71	10.3.99.24/30	10.3.99.25 – 10.3.99.26	10.3.99.27
72	10.3.99.28/30	10.3.99.29 – 10.3.99.30	10.3.99.31
73	10.3.99.32/30	10.3.99.33 – 10.3.99.34	10.3.99.35
74	10.3.99.36/30	10.3.99.37 – 10.3.99.38	10.3.99.39
75	10.3.99.40/30	10.3.99.41 – 10.3.99.42	10.3.99.43
76	10.3.99.44/30	10.3.99.45 – 10.3.99.46	10.3.99.47
77	10.3.99.48/30	10.3.99.49 – 10.3.99.50	10.3.99.51
78	10.3.99.52/30	10.3.99.53 – 10.3.99.54	10.3.99.55
79	10.3.99.56/30	10.3.99.57 – 10.3.99.58	10.3.99.59
80	10.3.99.60/30	10.3.99.61 – 10.3.99.62	10.3.99.63
81	10.3.99.64/30	10.3.99.65 – 10.3.99.66	10.3.99.67
82	10.3.99.68/30	10.3.99.69 – 10.3.99.70	10.3.99.71
83	10.3.99.72/30	10.3.99.73 – 10.3.99.74	10.3.99.75
84	10.3.99.76/30	10.3.99.77 – 10.3.99.78	10.3.99.79
85	10.3.99.80/30	10.3.99.81 – 10.3.99.82	10.3.99.83
86	10.3.99.84/30	10.3.99.85 – 10.3.99.86	10.3.99.87
87	10.3.99.88/30	10.3.99.89 – 10.3.99.90	10.3.99.91
88	10.3.99.92/30	10.3.99.93 – 10.3.99.94	10.3.99.95
89	10.3.99.96/30	10.3.99.97 – 10.3.99.98	10.3.99.99
90	10.3.99.100/30	10.3.99.101 – 10.3.99.102	10.3.99.103
91	10.3.99.104/30	10.3.99.105 – 10.3.99.106	10.3.99.107
92	10.3.99.108/30	10.3.99.109 – 10.3.99.110	10.3.99.111
93	10.3.99.112/30	10.3.99.113 – 10.3.99.114	10.3.99.115
94	10.3.99.116/30	10.3.99.117 – 10.3.99.118	10.3.99.119
95	10.3.99.120/30	10.3.99.121 – 10.3.99.122	10.3.99.123
96	10.3.99.124/30	10.3.99.125 – 10.3.99.126	10.3.99.127
97	10.3.99.128/30	10.3.99.129 – 10.3.99.130	10.3.99.131
98	10.3.99.132/30	10.3.99.133 – 10.3.99.134	10.3.99.135
99	10.3.99.136/30	10.3.99.137 – 10.3.99.138	10.3.99.139
100	10.3.99.140/30	10.3.99.141 – 10.3.99.142	10.3.99.143
101	10.3.99.144/30	10.3.99.145 – 10.3.99.146	10.3.99.147
102	10.3.99.148/30	10.3.99.149 – 10.3.99.150	10.3.99.151
103	10.3.99.152/30	10.3.99.153 – 10.3.99.154	10.3.99.155
104	10.3.99.156/30	10.3.99.157 – 10.3.99.158	10.3.99.159
105	10.3.99.160/30	10.3.99.161 – 10.3.99.162	10.3.99.163
106	10.3.99.164/30	10.3.99.165 – 10.3.99.166	10.3.99.167
107	10.3.99.168/30	10.3.99.169 – 10.3.99.170	10.3.99.171
108	10.3.99.172/30	10.3.99.173 – 10.3.99.174	10.3.99.175
109	10.3.99.176/30	10.3.99.177 – 10.3.99.178	10.3.99.179
110	10.3.99.180/30	10.3.99.181 – 10.3.99.182	10.3.99.183
111	10.3.99.184/30	10.3.99.185 – 10.3.99.186	10.3.99.187
112	10.3.99.188/30	10.3.99.189 – 10.3.99.190	10.3.99.191
113	10.3.99.192/30	10.3.99.193 – 10.3.99.194	10.3.99.195
114	10.3.99.196/30	10.3.99.197 – 10.3.99.198	10.3.99.199
115	10.3.99.200/30	10.3.99.201 – 10.3.99.202	10.3.99.203
116	10.3.99.204/30	10.3.99.205 – 10.3.99.206	10.3.99.207
117	10.3.99.208/30	10.3.99.209 – 10.3.99.210	10.3.99.211
118	10.3.99.212/30	10.3.99.213 – 10.3.99.214	10.3.99.215
119	10.3.99.216/30	10.3.99.217 – 10.3.99.218	10.3.99.219
120	10.3.99.220/30	10.3.99.221 – 10.3.99.222	10.3.99.223
121	10.3.99.224/30	10.3.99.225 – 10.3.99.226	10.3.99.227
122	10.3.99.228/30	10.3.99.229 – 10.3.99.230	10.3.99.231
123	10.3.99.232/30	10.3.99.233 – 10.3.99.234	10.3.99.235
124	10.3.99.236/30	10.3.99.237 – 10.3.99.238	10.3.99.239
125	10.3.99.240/30	10.3.99.241 – 10.3.99.242	10.3.99.243
126	10.3.99.244/30	10.3.99.245 – 10.3.99.246	10.3.99.247
127	10.3.99.248/30	10.3.99.249 – 10.3.99.250	10.3.99.251
128	10.3.99.252/30	10.3.99.253 – 10.3.99.254	10.3.99.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →