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)10.0.198.0/24

network10.0.198.0/24

broadcast10.0.198.255

first host10.0.198.1

last host10.0.198.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.198.0/24

address00001010.00000000.11000110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11000110.00000000

broadcast00001010.00000000.11000110.11111111

green = network part, grey = host part

hex0x0a00c600

decimal167822848

reverse dns0.198.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:c600

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.198.0/31	10.0.198.0 – 10.0.198.1	10.0.198.1
2	10.0.198.2/31	10.0.198.2 – 10.0.198.3	10.0.198.3
3	10.0.198.4/31	10.0.198.4 – 10.0.198.5	10.0.198.5
4	10.0.198.6/31	10.0.198.6 – 10.0.198.7	10.0.198.7
5	10.0.198.8/31	10.0.198.8 – 10.0.198.9	10.0.198.9
6	10.0.198.10/31	10.0.198.10 – 10.0.198.11	10.0.198.11
7	10.0.198.12/31	10.0.198.12 – 10.0.198.13	10.0.198.13
8	10.0.198.14/31	10.0.198.14 – 10.0.198.15	10.0.198.15
9	10.0.198.16/31	10.0.198.16 – 10.0.198.17	10.0.198.17
10	10.0.198.18/31	10.0.198.18 – 10.0.198.19	10.0.198.19
11	10.0.198.20/31	10.0.198.20 – 10.0.198.21	10.0.198.21
12	10.0.198.22/31	10.0.198.22 – 10.0.198.23	10.0.198.23
13	10.0.198.24/31	10.0.198.24 – 10.0.198.25	10.0.198.25
14	10.0.198.26/31	10.0.198.26 – 10.0.198.27	10.0.198.27
15	10.0.198.28/31	10.0.198.28 – 10.0.198.29	10.0.198.29
16	10.0.198.30/31	10.0.198.30 – 10.0.198.31	10.0.198.31
17	10.0.198.32/31	10.0.198.32 – 10.0.198.33	10.0.198.33
18	10.0.198.34/31	10.0.198.34 – 10.0.198.35	10.0.198.35
19	10.0.198.36/31	10.0.198.36 – 10.0.198.37	10.0.198.37
20	10.0.198.38/31	10.0.198.38 – 10.0.198.39	10.0.198.39
21	10.0.198.40/31	10.0.198.40 – 10.0.198.41	10.0.198.41
22	10.0.198.42/31	10.0.198.42 – 10.0.198.43	10.0.198.43
23	10.0.198.44/31	10.0.198.44 – 10.0.198.45	10.0.198.45
24	10.0.198.46/31	10.0.198.46 – 10.0.198.47	10.0.198.47
25	10.0.198.48/31	10.0.198.48 – 10.0.198.49	10.0.198.49
26	10.0.198.50/31	10.0.198.50 – 10.0.198.51	10.0.198.51
27	10.0.198.52/31	10.0.198.52 – 10.0.198.53	10.0.198.53
28	10.0.198.54/31	10.0.198.54 – 10.0.198.55	10.0.198.55
29	10.0.198.56/31	10.0.198.56 – 10.0.198.57	10.0.198.57
30	10.0.198.58/31	10.0.198.58 – 10.0.198.59	10.0.198.59
31	10.0.198.60/31	10.0.198.60 – 10.0.198.61	10.0.198.61
32	10.0.198.62/31	10.0.198.62 – 10.0.198.63	10.0.198.63
33	10.0.198.64/31	10.0.198.64 – 10.0.198.65	10.0.198.65
34	10.0.198.66/31	10.0.198.66 – 10.0.198.67	10.0.198.67
35	10.0.198.68/31	10.0.198.68 – 10.0.198.69	10.0.198.69
36	10.0.198.70/31	10.0.198.70 – 10.0.198.71	10.0.198.71
37	10.0.198.72/31	10.0.198.72 – 10.0.198.73	10.0.198.73
38	10.0.198.74/31	10.0.198.74 – 10.0.198.75	10.0.198.75
39	10.0.198.76/31	10.0.198.76 – 10.0.198.77	10.0.198.77
40	10.0.198.78/31	10.0.198.78 – 10.0.198.79	10.0.198.79
41	10.0.198.80/31	10.0.198.80 – 10.0.198.81	10.0.198.81
42	10.0.198.82/31	10.0.198.82 – 10.0.198.83	10.0.198.83
43	10.0.198.84/31	10.0.198.84 – 10.0.198.85	10.0.198.85
44	10.0.198.86/31	10.0.198.86 – 10.0.198.87	10.0.198.87
45	10.0.198.88/31	10.0.198.88 – 10.0.198.89	10.0.198.89
46	10.0.198.90/31	10.0.198.90 – 10.0.198.91	10.0.198.91
47	10.0.198.92/31	10.0.198.92 – 10.0.198.93	10.0.198.93
48	10.0.198.94/31	10.0.198.94 – 10.0.198.95	10.0.198.95
49	10.0.198.96/31	10.0.198.96 – 10.0.198.97	10.0.198.97
50	10.0.198.98/31	10.0.198.98 – 10.0.198.99	10.0.198.99
51	10.0.198.100/31	10.0.198.100 – 10.0.198.101	10.0.198.101
52	10.0.198.102/31	10.0.198.102 – 10.0.198.103	10.0.198.103
53	10.0.198.104/31	10.0.198.104 – 10.0.198.105	10.0.198.105
54	10.0.198.106/31	10.0.198.106 – 10.0.198.107	10.0.198.107
55	10.0.198.108/31	10.0.198.108 – 10.0.198.109	10.0.198.109
56	10.0.198.110/31	10.0.198.110 – 10.0.198.111	10.0.198.111
57	10.0.198.112/31	10.0.198.112 – 10.0.198.113	10.0.198.113
58	10.0.198.114/31	10.0.198.114 – 10.0.198.115	10.0.198.115
59	10.0.198.116/31	10.0.198.116 – 10.0.198.117	10.0.198.117
60	10.0.198.118/31	10.0.198.118 – 10.0.198.119	10.0.198.119
61	10.0.198.120/31	10.0.198.120 – 10.0.198.121	10.0.198.121
62	10.0.198.122/31	10.0.198.122 – 10.0.198.123	10.0.198.123
63	10.0.198.124/31	10.0.198.124 – 10.0.198.125	10.0.198.125
64	10.0.198.126/31	10.0.198.126 – 10.0.198.127	10.0.198.127
65	10.0.198.128/31	10.0.198.128 – 10.0.198.129	10.0.198.129
66	10.0.198.130/31	10.0.198.130 – 10.0.198.131	10.0.198.131
67	10.0.198.132/31	10.0.198.132 – 10.0.198.133	10.0.198.133
68	10.0.198.134/31	10.0.198.134 – 10.0.198.135	10.0.198.135
69	10.0.198.136/31	10.0.198.136 – 10.0.198.137	10.0.198.137
70	10.0.198.138/31	10.0.198.138 – 10.0.198.139	10.0.198.139
71	10.0.198.140/31	10.0.198.140 – 10.0.198.141	10.0.198.141
72	10.0.198.142/31	10.0.198.142 – 10.0.198.143	10.0.198.143
73	10.0.198.144/31	10.0.198.144 – 10.0.198.145	10.0.198.145
74	10.0.198.146/31	10.0.198.146 – 10.0.198.147	10.0.198.147
75	10.0.198.148/31	10.0.198.148 – 10.0.198.149	10.0.198.149
76	10.0.198.150/31	10.0.198.150 – 10.0.198.151	10.0.198.151
77	10.0.198.152/31	10.0.198.152 – 10.0.198.153	10.0.198.153
78	10.0.198.154/31	10.0.198.154 – 10.0.198.155	10.0.198.155
79	10.0.198.156/31	10.0.198.156 – 10.0.198.157	10.0.198.157
80	10.0.198.158/31	10.0.198.158 – 10.0.198.159	10.0.198.159
81	10.0.198.160/31	10.0.198.160 – 10.0.198.161	10.0.198.161
82	10.0.198.162/31	10.0.198.162 – 10.0.198.163	10.0.198.163
83	10.0.198.164/31	10.0.198.164 – 10.0.198.165	10.0.198.165
84	10.0.198.166/31	10.0.198.166 – 10.0.198.167	10.0.198.167
85	10.0.198.168/31	10.0.198.168 – 10.0.198.169	10.0.198.169
86	10.0.198.170/31	10.0.198.170 – 10.0.198.171	10.0.198.171
87	10.0.198.172/31	10.0.198.172 – 10.0.198.173	10.0.198.173
88	10.0.198.174/31	10.0.198.174 – 10.0.198.175	10.0.198.175
89	10.0.198.176/31	10.0.198.176 – 10.0.198.177	10.0.198.177
90	10.0.198.178/31	10.0.198.178 – 10.0.198.179	10.0.198.179
91	10.0.198.180/31	10.0.198.180 – 10.0.198.181	10.0.198.181
92	10.0.198.182/31	10.0.198.182 – 10.0.198.183	10.0.198.183
93	10.0.198.184/31	10.0.198.184 – 10.0.198.185	10.0.198.185
94	10.0.198.186/31	10.0.198.186 – 10.0.198.187	10.0.198.187
95	10.0.198.188/31	10.0.198.188 – 10.0.198.189	10.0.198.189
96	10.0.198.190/31	10.0.198.190 – 10.0.198.191	10.0.198.191
97	10.0.198.192/31	10.0.198.192 – 10.0.198.193	10.0.198.193
98	10.0.198.194/31	10.0.198.194 – 10.0.198.195	10.0.198.195
99	10.0.198.196/31	10.0.198.196 – 10.0.198.197	10.0.198.197
100	10.0.198.198/31	10.0.198.198 – 10.0.198.199	10.0.198.199
101	10.0.198.200/31	10.0.198.200 – 10.0.198.201	10.0.198.201
102	10.0.198.202/31	10.0.198.202 – 10.0.198.203	10.0.198.203
103	10.0.198.204/31	10.0.198.204 – 10.0.198.205	10.0.198.205
104	10.0.198.206/31	10.0.198.206 – 10.0.198.207	10.0.198.207
105	10.0.198.208/31	10.0.198.208 – 10.0.198.209	10.0.198.209
106	10.0.198.210/31	10.0.198.210 – 10.0.198.211	10.0.198.211
107	10.0.198.212/31	10.0.198.212 – 10.0.198.213	10.0.198.213
108	10.0.198.214/31	10.0.198.214 – 10.0.198.215	10.0.198.215
109	10.0.198.216/31	10.0.198.216 – 10.0.198.217	10.0.198.217
110	10.0.198.218/31	10.0.198.218 – 10.0.198.219	10.0.198.219
111	10.0.198.220/31	10.0.198.220 – 10.0.198.221	10.0.198.221
112	10.0.198.222/31	10.0.198.222 – 10.0.198.223	10.0.198.223
113	10.0.198.224/31	10.0.198.224 – 10.0.198.225	10.0.198.225
114	10.0.198.226/31	10.0.198.226 – 10.0.198.227	10.0.198.227
115	10.0.198.228/31	10.0.198.228 – 10.0.198.229	10.0.198.229
116	10.0.198.230/31	10.0.198.230 – 10.0.198.231	10.0.198.231
117	10.0.198.232/31	10.0.198.232 – 10.0.198.233	10.0.198.233
118	10.0.198.234/31	10.0.198.234 – 10.0.198.235	10.0.198.235
119	10.0.198.236/31	10.0.198.236 – 10.0.198.237	10.0.198.237
120	10.0.198.238/31	10.0.198.238 – 10.0.198.239	10.0.198.239
121	10.0.198.240/31	10.0.198.240 – 10.0.198.241	10.0.198.241
122	10.0.198.242/31	10.0.198.242 – 10.0.198.243	10.0.198.243
123	10.0.198.244/31	10.0.198.244 – 10.0.198.245	10.0.198.245
124	10.0.198.246/31	10.0.198.246 – 10.0.198.247	10.0.198.247
125	10.0.198.248/31	10.0.198.248 – 10.0.198.249	10.0.198.249
126	10.0.198.250/31	10.0.198.250 – 10.0.198.251	10.0.198.251
127	10.0.198.252/31	10.0.198.252 – 10.0.198.253	10.0.198.253
128	10.0.198.254/31	10.0.198.254 – 10.0.198.255	10.0.198.255

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