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)10.2.193.0/24

network10.2.193.0/24

broadcast10.2.193.255

first host10.2.193.1

last host10.2.193.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.193.0/24

address00001010.00000010.11000001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11000001.00000000

broadcast00001010.00000010.11000001.11111111

green = network part, grey = host part

hex0x0a02c100

decimal167952640

reverse dns0.193.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:c100

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.193.0/31	10.2.193.0 – 10.2.193.1	10.2.193.1
2	10.2.193.2/31	10.2.193.2 – 10.2.193.3	10.2.193.3
3	10.2.193.4/31	10.2.193.4 – 10.2.193.5	10.2.193.5
4	10.2.193.6/31	10.2.193.6 – 10.2.193.7	10.2.193.7
5	10.2.193.8/31	10.2.193.8 – 10.2.193.9	10.2.193.9
6	10.2.193.10/31	10.2.193.10 – 10.2.193.11	10.2.193.11
7	10.2.193.12/31	10.2.193.12 – 10.2.193.13	10.2.193.13
8	10.2.193.14/31	10.2.193.14 – 10.2.193.15	10.2.193.15
9	10.2.193.16/31	10.2.193.16 – 10.2.193.17	10.2.193.17
10	10.2.193.18/31	10.2.193.18 – 10.2.193.19	10.2.193.19
11	10.2.193.20/31	10.2.193.20 – 10.2.193.21	10.2.193.21
12	10.2.193.22/31	10.2.193.22 – 10.2.193.23	10.2.193.23
13	10.2.193.24/31	10.2.193.24 – 10.2.193.25	10.2.193.25
14	10.2.193.26/31	10.2.193.26 – 10.2.193.27	10.2.193.27
15	10.2.193.28/31	10.2.193.28 – 10.2.193.29	10.2.193.29
16	10.2.193.30/31	10.2.193.30 – 10.2.193.31	10.2.193.31
17	10.2.193.32/31	10.2.193.32 – 10.2.193.33	10.2.193.33
18	10.2.193.34/31	10.2.193.34 – 10.2.193.35	10.2.193.35
19	10.2.193.36/31	10.2.193.36 – 10.2.193.37	10.2.193.37
20	10.2.193.38/31	10.2.193.38 – 10.2.193.39	10.2.193.39
21	10.2.193.40/31	10.2.193.40 – 10.2.193.41	10.2.193.41
22	10.2.193.42/31	10.2.193.42 – 10.2.193.43	10.2.193.43
23	10.2.193.44/31	10.2.193.44 – 10.2.193.45	10.2.193.45
24	10.2.193.46/31	10.2.193.46 – 10.2.193.47	10.2.193.47
25	10.2.193.48/31	10.2.193.48 – 10.2.193.49	10.2.193.49
26	10.2.193.50/31	10.2.193.50 – 10.2.193.51	10.2.193.51
27	10.2.193.52/31	10.2.193.52 – 10.2.193.53	10.2.193.53
28	10.2.193.54/31	10.2.193.54 – 10.2.193.55	10.2.193.55
29	10.2.193.56/31	10.2.193.56 – 10.2.193.57	10.2.193.57
30	10.2.193.58/31	10.2.193.58 – 10.2.193.59	10.2.193.59
31	10.2.193.60/31	10.2.193.60 – 10.2.193.61	10.2.193.61
32	10.2.193.62/31	10.2.193.62 – 10.2.193.63	10.2.193.63
33	10.2.193.64/31	10.2.193.64 – 10.2.193.65	10.2.193.65
34	10.2.193.66/31	10.2.193.66 – 10.2.193.67	10.2.193.67
35	10.2.193.68/31	10.2.193.68 – 10.2.193.69	10.2.193.69
36	10.2.193.70/31	10.2.193.70 – 10.2.193.71	10.2.193.71
37	10.2.193.72/31	10.2.193.72 – 10.2.193.73	10.2.193.73
38	10.2.193.74/31	10.2.193.74 – 10.2.193.75	10.2.193.75
39	10.2.193.76/31	10.2.193.76 – 10.2.193.77	10.2.193.77
40	10.2.193.78/31	10.2.193.78 – 10.2.193.79	10.2.193.79
41	10.2.193.80/31	10.2.193.80 – 10.2.193.81	10.2.193.81
42	10.2.193.82/31	10.2.193.82 – 10.2.193.83	10.2.193.83
43	10.2.193.84/31	10.2.193.84 – 10.2.193.85	10.2.193.85
44	10.2.193.86/31	10.2.193.86 – 10.2.193.87	10.2.193.87
45	10.2.193.88/31	10.2.193.88 – 10.2.193.89	10.2.193.89
46	10.2.193.90/31	10.2.193.90 – 10.2.193.91	10.2.193.91
47	10.2.193.92/31	10.2.193.92 – 10.2.193.93	10.2.193.93
48	10.2.193.94/31	10.2.193.94 – 10.2.193.95	10.2.193.95
49	10.2.193.96/31	10.2.193.96 – 10.2.193.97	10.2.193.97
50	10.2.193.98/31	10.2.193.98 – 10.2.193.99	10.2.193.99
51	10.2.193.100/31	10.2.193.100 – 10.2.193.101	10.2.193.101
52	10.2.193.102/31	10.2.193.102 – 10.2.193.103	10.2.193.103
53	10.2.193.104/31	10.2.193.104 – 10.2.193.105	10.2.193.105
54	10.2.193.106/31	10.2.193.106 – 10.2.193.107	10.2.193.107
55	10.2.193.108/31	10.2.193.108 – 10.2.193.109	10.2.193.109
56	10.2.193.110/31	10.2.193.110 – 10.2.193.111	10.2.193.111
57	10.2.193.112/31	10.2.193.112 – 10.2.193.113	10.2.193.113
58	10.2.193.114/31	10.2.193.114 – 10.2.193.115	10.2.193.115
59	10.2.193.116/31	10.2.193.116 – 10.2.193.117	10.2.193.117
60	10.2.193.118/31	10.2.193.118 – 10.2.193.119	10.2.193.119
61	10.2.193.120/31	10.2.193.120 – 10.2.193.121	10.2.193.121
62	10.2.193.122/31	10.2.193.122 – 10.2.193.123	10.2.193.123
63	10.2.193.124/31	10.2.193.124 – 10.2.193.125	10.2.193.125
64	10.2.193.126/31	10.2.193.126 – 10.2.193.127	10.2.193.127
65	10.2.193.128/31	10.2.193.128 – 10.2.193.129	10.2.193.129
66	10.2.193.130/31	10.2.193.130 – 10.2.193.131	10.2.193.131
67	10.2.193.132/31	10.2.193.132 – 10.2.193.133	10.2.193.133
68	10.2.193.134/31	10.2.193.134 – 10.2.193.135	10.2.193.135
69	10.2.193.136/31	10.2.193.136 – 10.2.193.137	10.2.193.137
70	10.2.193.138/31	10.2.193.138 – 10.2.193.139	10.2.193.139
71	10.2.193.140/31	10.2.193.140 – 10.2.193.141	10.2.193.141
72	10.2.193.142/31	10.2.193.142 – 10.2.193.143	10.2.193.143
73	10.2.193.144/31	10.2.193.144 – 10.2.193.145	10.2.193.145
74	10.2.193.146/31	10.2.193.146 – 10.2.193.147	10.2.193.147
75	10.2.193.148/31	10.2.193.148 – 10.2.193.149	10.2.193.149
76	10.2.193.150/31	10.2.193.150 – 10.2.193.151	10.2.193.151
77	10.2.193.152/31	10.2.193.152 – 10.2.193.153	10.2.193.153
78	10.2.193.154/31	10.2.193.154 – 10.2.193.155	10.2.193.155
79	10.2.193.156/31	10.2.193.156 – 10.2.193.157	10.2.193.157
80	10.2.193.158/31	10.2.193.158 – 10.2.193.159	10.2.193.159
81	10.2.193.160/31	10.2.193.160 – 10.2.193.161	10.2.193.161
82	10.2.193.162/31	10.2.193.162 – 10.2.193.163	10.2.193.163
83	10.2.193.164/31	10.2.193.164 – 10.2.193.165	10.2.193.165
84	10.2.193.166/31	10.2.193.166 – 10.2.193.167	10.2.193.167
85	10.2.193.168/31	10.2.193.168 – 10.2.193.169	10.2.193.169
86	10.2.193.170/31	10.2.193.170 – 10.2.193.171	10.2.193.171
87	10.2.193.172/31	10.2.193.172 – 10.2.193.173	10.2.193.173
88	10.2.193.174/31	10.2.193.174 – 10.2.193.175	10.2.193.175
89	10.2.193.176/31	10.2.193.176 – 10.2.193.177	10.2.193.177
90	10.2.193.178/31	10.2.193.178 – 10.2.193.179	10.2.193.179
91	10.2.193.180/31	10.2.193.180 – 10.2.193.181	10.2.193.181
92	10.2.193.182/31	10.2.193.182 – 10.2.193.183	10.2.193.183
93	10.2.193.184/31	10.2.193.184 – 10.2.193.185	10.2.193.185
94	10.2.193.186/31	10.2.193.186 – 10.2.193.187	10.2.193.187
95	10.2.193.188/31	10.2.193.188 – 10.2.193.189	10.2.193.189
96	10.2.193.190/31	10.2.193.190 – 10.2.193.191	10.2.193.191
97	10.2.193.192/31	10.2.193.192 – 10.2.193.193	10.2.193.193
98	10.2.193.194/31	10.2.193.194 – 10.2.193.195	10.2.193.195
99	10.2.193.196/31	10.2.193.196 – 10.2.193.197	10.2.193.197
100	10.2.193.198/31	10.2.193.198 – 10.2.193.199	10.2.193.199
101	10.2.193.200/31	10.2.193.200 – 10.2.193.201	10.2.193.201
102	10.2.193.202/31	10.2.193.202 – 10.2.193.203	10.2.193.203
103	10.2.193.204/31	10.2.193.204 – 10.2.193.205	10.2.193.205
104	10.2.193.206/31	10.2.193.206 – 10.2.193.207	10.2.193.207
105	10.2.193.208/31	10.2.193.208 – 10.2.193.209	10.2.193.209
106	10.2.193.210/31	10.2.193.210 – 10.2.193.211	10.2.193.211
107	10.2.193.212/31	10.2.193.212 – 10.2.193.213	10.2.193.213
108	10.2.193.214/31	10.2.193.214 – 10.2.193.215	10.2.193.215
109	10.2.193.216/31	10.2.193.216 – 10.2.193.217	10.2.193.217
110	10.2.193.218/31	10.2.193.218 – 10.2.193.219	10.2.193.219
111	10.2.193.220/31	10.2.193.220 – 10.2.193.221	10.2.193.221
112	10.2.193.222/31	10.2.193.222 – 10.2.193.223	10.2.193.223
113	10.2.193.224/31	10.2.193.224 – 10.2.193.225	10.2.193.225
114	10.2.193.226/31	10.2.193.226 – 10.2.193.227	10.2.193.227
115	10.2.193.228/31	10.2.193.228 – 10.2.193.229	10.2.193.229
116	10.2.193.230/31	10.2.193.230 – 10.2.193.231	10.2.193.231
117	10.2.193.232/31	10.2.193.232 – 10.2.193.233	10.2.193.233
118	10.2.193.234/31	10.2.193.234 – 10.2.193.235	10.2.193.235
119	10.2.193.236/31	10.2.193.236 – 10.2.193.237	10.2.193.237
120	10.2.193.238/31	10.2.193.238 – 10.2.193.239	10.2.193.239
121	10.2.193.240/31	10.2.193.240 – 10.2.193.241	10.2.193.241
122	10.2.193.242/31	10.2.193.242 – 10.2.193.243	10.2.193.243
123	10.2.193.244/31	10.2.193.244 – 10.2.193.245	10.2.193.245
124	10.2.193.246/31	10.2.193.246 – 10.2.193.247	10.2.193.247
125	10.2.193.248/31	10.2.193.248 – 10.2.193.249	10.2.193.249
126	10.2.193.250/31	10.2.193.250 – 10.2.193.251	10.2.193.251
127	10.2.193.252/31	10.2.193.252 – 10.2.193.253	10.2.193.253
128	10.2.193.254/31	10.2.193.254 – 10.2.193.255	10.2.193.255

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 →