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)10.2.199.0/24

network10.2.199.0/24

broadcast10.2.199.255

first host10.2.199.1

last host10.2.199.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.199.0/24

address00001010.00000010.11000111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11000111.00000000

broadcast00001010.00000010.11000111.11111111

green = network part, grey = host part

hex0x0a02c700

decimal167954176

reverse dns0.199.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:c700

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.199.0/31	10.2.199.0 – 10.2.199.1	10.2.199.1
2	10.2.199.2/31	10.2.199.2 – 10.2.199.3	10.2.199.3
3	10.2.199.4/31	10.2.199.4 – 10.2.199.5	10.2.199.5
4	10.2.199.6/31	10.2.199.6 – 10.2.199.7	10.2.199.7
5	10.2.199.8/31	10.2.199.8 – 10.2.199.9	10.2.199.9
6	10.2.199.10/31	10.2.199.10 – 10.2.199.11	10.2.199.11
7	10.2.199.12/31	10.2.199.12 – 10.2.199.13	10.2.199.13
8	10.2.199.14/31	10.2.199.14 – 10.2.199.15	10.2.199.15
9	10.2.199.16/31	10.2.199.16 – 10.2.199.17	10.2.199.17
10	10.2.199.18/31	10.2.199.18 – 10.2.199.19	10.2.199.19
11	10.2.199.20/31	10.2.199.20 – 10.2.199.21	10.2.199.21
12	10.2.199.22/31	10.2.199.22 – 10.2.199.23	10.2.199.23
13	10.2.199.24/31	10.2.199.24 – 10.2.199.25	10.2.199.25
14	10.2.199.26/31	10.2.199.26 – 10.2.199.27	10.2.199.27
15	10.2.199.28/31	10.2.199.28 – 10.2.199.29	10.2.199.29
16	10.2.199.30/31	10.2.199.30 – 10.2.199.31	10.2.199.31
17	10.2.199.32/31	10.2.199.32 – 10.2.199.33	10.2.199.33
18	10.2.199.34/31	10.2.199.34 – 10.2.199.35	10.2.199.35
19	10.2.199.36/31	10.2.199.36 – 10.2.199.37	10.2.199.37
20	10.2.199.38/31	10.2.199.38 – 10.2.199.39	10.2.199.39
21	10.2.199.40/31	10.2.199.40 – 10.2.199.41	10.2.199.41
22	10.2.199.42/31	10.2.199.42 – 10.2.199.43	10.2.199.43
23	10.2.199.44/31	10.2.199.44 – 10.2.199.45	10.2.199.45
24	10.2.199.46/31	10.2.199.46 – 10.2.199.47	10.2.199.47
25	10.2.199.48/31	10.2.199.48 – 10.2.199.49	10.2.199.49
26	10.2.199.50/31	10.2.199.50 – 10.2.199.51	10.2.199.51
27	10.2.199.52/31	10.2.199.52 – 10.2.199.53	10.2.199.53
28	10.2.199.54/31	10.2.199.54 – 10.2.199.55	10.2.199.55
29	10.2.199.56/31	10.2.199.56 – 10.2.199.57	10.2.199.57
30	10.2.199.58/31	10.2.199.58 – 10.2.199.59	10.2.199.59
31	10.2.199.60/31	10.2.199.60 – 10.2.199.61	10.2.199.61
32	10.2.199.62/31	10.2.199.62 – 10.2.199.63	10.2.199.63
33	10.2.199.64/31	10.2.199.64 – 10.2.199.65	10.2.199.65
34	10.2.199.66/31	10.2.199.66 – 10.2.199.67	10.2.199.67
35	10.2.199.68/31	10.2.199.68 – 10.2.199.69	10.2.199.69
36	10.2.199.70/31	10.2.199.70 – 10.2.199.71	10.2.199.71
37	10.2.199.72/31	10.2.199.72 – 10.2.199.73	10.2.199.73
38	10.2.199.74/31	10.2.199.74 – 10.2.199.75	10.2.199.75
39	10.2.199.76/31	10.2.199.76 – 10.2.199.77	10.2.199.77
40	10.2.199.78/31	10.2.199.78 – 10.2.199.79	10.2.199.79
41	10.2.199.80/31	10.2.199.80 – 10.2.199.81	10.2.199.81
42	10.2.199.82/31	10.2.199.82 – 10.2.199.83	10.2.199.83
43	10.2.199.84/31	10.2.199.84 – 10.2.199.85	10.2.199.85
44	10.2.199.86/31	10.2.199.86 – 10.2.199.87	10.2.199.87
45	10.2.199.88/31	10.2.199.88 – 10.2.199.89	10.2.199.89
46	10.2.199.90/31	10.2.199.90 – 10.2.199.91	10.2.199.91
47	10.2.199.92/31	10.2.199.92 – 10.2.199.93	10.2.199.93
48	10.2.199.94/31	10.2.199.94 – 10.2.199.95	10.2.199.95
49	10.2.199.96/31	10.2.199.96 – 10.2.199.97	10.2.199.97
50	10.2.199.98/31	10.2.199.98 – 10.2.199.99	10.2.199.99
51	10.2.199.100/31	10.2.199.100 – 10.2.199.101	10.2.199.101
52	10.2.199.102/31	10.2.199.102 – 10.2.199.103	10.2.199.103
53	10.2.199.104/31	10.2.199.104 – 10.2.199.105	10.2.199.105
54	10.2.199.106/31	10.2.199.106 – 10.2.199.107	10.2.199.107
55	10.2.199.108/31	10.2.199.108 – 10.2.199.109	10.2.199.109
56	10.2.199.110/31	10.2.199.110 – 10.2.199.111	10.2.199.111
57	10.2.199.112/31	10.2.199.112 – 10.2.199.113	10.2.199.113
58	10.2.199.114/31	10.2.199.114 – 10.2.199.115	10.2.199.115
59	10.2.199.116/31	10.2.199.116 – 10.2.199.117	10.2.199.117
60	10.2.199.118/31	10.2.199.118 – 10.2.199.119	10.2.199.119
61	10.2.199.120/31	10.2.199.120 – 10.2.199.121	10.2.199.121
62	10.2.199.122/31	10.2.199.122 – 10.2.199.123	10.2.199.123
63	10.2.199.124/31	10.2.199.124 – 10.2.199.125	10.2.199.125
64	10.2.199.126/31	10.2.199.126 – 10.2.199.127	10.2.199.127
65	10.2.199.128/31	10.2.199.128 – 10.2.199.129	10.2.199.129
66	10.2.199.130/31	10.2.199.130 – 10.2.199.131	10.2.199.131
67	10.2.199.132/31	10.2.199.132 – 10.2.199.133	10.2.199.133
68	10.2.199.134/31	10.2.199.134 – 10.2.199.135	10.2.199.135
69	10.2.199.136/31	10.2.199.136 – 10.2.199.137	10.2.199.137
70	10.2.199.138/31	10.2.199.138 – 10.2.199.139	10.2.199.139
71	10.2.199.140/31	10.2.199.140 – 10.2.199.141	10.2.199.141
72	10.2.199.142/31	10.2.199.142 – 10.2.199.143	10.2.199.143
73	10.2.199.144/31	10.2.199.144 – 10.2.199.145	10.2.199.145
74	10.2.199.146/31	10.2.199.146 – 10.2.199.147	10.2.199.147
75	10.2.199.148/31	10.2.199.148 – 10.2.199.149	10.2.199.149
76	10.2.199.150/31	10.2.199.150 – 10.2.199.151	10.2.199.151
77	10.2.199.152/31	10.2.199.152 – 10.2.199.153	10.2.199.153
78	10.2.199.154/31	10.2.199.154 – 10.2.199.155	10.2.199.155
79	10.2.199.156/31	10.2.199.156 – 10.2.199.157	10.2.199.157
80	10.2.199.158/31	10.2.199.158 – 10.2.199.159	10.2.199.159
81	10.2.199.160/31	10.2.199.160 – 10.2.199.161	10.2.199.161
82	10.2.199.162/31	10.2.199.162 – 10.2.199.163	10.2.199.163
83	10.2.199.164/31	10.2.199.164 – 10.2.199.165	10.2.199.165
84	10.2.199.166/31	10.2.199.166 – 10.2.199.167	10.2.199.167
85	10.2.199.168/31	10.2.199.168 – 10.2.199.169	10.2.199.169
86	10.2.199.170/31	10.2.199.170 – 10.2.199.171	10.2.199.171
87	10.2.199.172/31	10.2.199.172 – 10.2.199.173	10.2.199.173
88	10.2.199.174/31	10.2.199.174 – 10.2.199.175	10.2.199.175
89	10.2.199.176/31	10.2.199.176 – 10.2.199.177	10.2.199.177
90	10.2.199.178/31	10.2.199.178 – 10.2.199.179	10.2.199.179
91	10.2.199.180/31	10.2.199.180 – 10.2.199.181	10.2.199.181
92	10.2.199.182/31	10.2.199.182 – 10.2.199.183	10.2.199.183
93	10.2.199.184/31	10.2.199.184 – 10.2.199.185	10.2.199.185
94	10.2.199.186/31	10.2.199.186 – 10.2.199.187	10.2.199.187
95	10.2.199.188/31	10.2.199.188 – 10.2.199.189	10.2.199.189
96	10.2.199.190/31	10.2.199.190 – 10.2.199.191	10.2.199.191
97	10.2.199.192/31	10.2.199.192 – 10.2.199.193	10.2.199.193
98	10.2.199.194/31	10.2.199.194 – 10.2.199.195	10.2.199.195
99	10.2.199.196/31	10.2.199.196 – 10.2.199.197	10.2.199.197
100	10.2.199.198/31	10.2.199.198 – 10.2.199.199	10.2.199.199
101	10.2.199.200/31	10.2.199.200 – 10.2.199.201	10.2.199.201
102	10.2.199.202/31	10.2.199.202 – 10.2.199.203	10.2.199.203
103	10.2.199.204/31	10.2.199.204 – 10.2.199.205	10.2.199.205
104	10.2.199.206/31	10.2.199.206 – 10.2.199.207	10.2.199.207
105	10.2.199.208/31	10.2.199.208 – 10.2.199.209	10.2.199.209
106	10.2.199.210/31	10.2.199.210 – 10.2.199.211	10.2.199.211
107	10.2.199.212/31	10.2.199.212 – 10.2.199.213	10.2.199.213
108	10.2.199.214/31	10.2.199.214 – 10.2.199.215	10.2.199.215
109	10.2.199.216/31	10.2.199.216 – 10.2.199.217	10.2.199.217
110	10.2.199.218/31	10.2.199.218 – 10.2.199.219	10.2.199.219
111	10.2.199.220/31	10.2.199.220 – 10.2.199.221	10.2.199.221
112	10.2.199.222/31	10.2.199.222 – 10.2.199.223	10.2.199.223
113	10.2.199.224/31	10.2.199.224 – 10.2.199.225	10.2.199.225
114	10.2.199.226/31	10.2.199.226 – 10.2.199.227	10.2.199.227
115	10.2.199.228/31	10.2.199.228 – 10.2.199.229	10.2.199.229
116	10.2.199.230/31	10.2.199.230 – 10.2.199.231	10.2.199.231
117	10.2.199.232/31	10.2.199.232 – 10.2.199.233	10.2.199.233
118	10.2.199.234/31	10.2.199.234 – 10.2.199.235	10.2.199.235
119	10.2.199.236/31	10.2.199.236 – 10.2.199.237	10.2.199.237
120	10.2.199.238/31	10.2.199.238 – 10.2.199.239	10.2.199.239
121	10.2.199.240/31	10.2.199.240 – 10.2.199.241	10.2.199.241
122	10.2.199.242/31	10.2.199.242 – 10.2.199.243	10.2.199.243
123	10.2.199.244/31	10.2.199.244 – 10.2.199.245	10.2.199.245
124	10.2.199.246/31	10.2.199.246 – 10.2.199.247	10.2.199.247
125	10.2.199.248/31	10.2.199.248 – 10.2.199.249	10.2.199.249
126	10.2.199.250/31	10.2.199.250 – 10.2.199.251	10.2.199.251
127	10.2.199.252/31	10.2.199.252 – 10.2.199.253	10.2.199.253
128	10.2.199.254/31	10.2.199.254 – 10.2.199.255	10.2.199.255

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 →