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)10.2.169.0/24

network10.2.169.0/24

broadcast10.2.169.255

first host10.2.169.1

last host10.2.169.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.169.0/24

address00001010.00000010.10101001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.10101001.00000000

broadcast00001010.00000010.10101001.11111111

green = network part, grey = host part

hex0x0a02a900

decimal167946496

reverse dns0.169.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a900

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.169.0/31	10.2.169.0 – 10.2.169.1	10.2.169.1
2	10.2.169.2/31	10.2.169.2 – 10.2.169.3	10.2.169.3
3	10.2.169.4/31	10.2.169.4 – 10.2.169.5	10.2.169.5
4	10.2.169.6/31	10.2.169.6 – 10.2.169.7	10.2.169.7
5	10.2.169.8/31	10.2.169.8 – 10.2.169.9	10.2.169.9
6	10.2.169.10/31	10.2.169.10 – 10.2.169.11	10.2.169.11
7	10.2.169.12/31	10.2.169.12 – 10.2.169.13	10.2.169.13
8	10.2.169.14/31	10.2.169.14 – 10.2.169.15	10.2.169.15
9	10.2.169.16/31	10.2.169.16 – 10.2.169.17	10.2.169.17
10	10.2.169.18/31	10.2.169.18 – 10.2.169.19	10.2.169.19
11	10.2.169.20/31	10.2.169.20 – 10.2.169.21	10.2.169.21
12	10.2.169.22/31	10.2.169.22 – 10.2.169.23	10.2.169.23
13	10.2.169.24/31	10.2.169.24 – 10.2.169.25	10.2.169.25
14	10.2.169.26/31	10.2.169.26 – 10.2.169.27	10.2.169.27
15	10.2.169.28/31	10.2.169.28 – 10.2.169.29	10.2.169.29
16	10.2.169.30/31	10.2.169.30 – 10.2.169.31	10.2.169.31
17	10.2.169.32/31	10.2.169.32 – 10.2.169.33	10.2.169.33
18	10.2.169.34/31	10.2.169.34 – 10.2.169.35	10.2.169.35
19	10.2.169.36/31	10.2.169.36 – 10.2.169.37	10.2.169.37
20	10.2.169.38/31	10.2.169.38 – 10.2.169.39	10.2.169.39
21	10.2.169.40/31	10.2.169.40 – 10.2.169.41	10.2.169.41
22	10.2.169.42/31	10.2.169.42 – 10.2.169.43	10.2.169.43
23	10.2.169.44/31	10.2.169.44 – 10.2.169.45	10.2.169.45
24	10.2.169.46/31	10.2.169.46 – 10.2.169.47	10.2.169.47
25	10.2.169.48/31	10.2.169.48 – 10.2.169.49	10.2.169.49
26	10.2.169.50/31	10.2.169.50 – 10.2.169.51	10.2.169.51
27	10.2.169.52/31	10.2.169.52 – 10.2.169.53	10.2.169.53
28	10.2.169.54/31	10.2.169.54 – 10.2.169.55	10.2.169.55
29	10.2.169.56/31	10.2.169.56 – 10.2.169.57	10.2.169.57
30	10.2.169.58/31	10.2.169.58 – 10.2.169.59	10.2.169.59
31	10.2.169.60/31	10.2.169.60 – 10.2.169.61	10.2.169.61
32	10.2.169.62/31	10.2.169.62 – 10.2.169.63	10.2.169.63
33	10.2.169.64/31	10.2.169.64 – 10.2.169.65	10.2.169.65
34	10.2.169.66/31	10.2.169.66 – 10.2.169.67	10.2.169.67
35	10.2.169.68/31	10.2.169.68 – 10.2.169.69	10.2.169.69
36	10.2.169.70/31	10.2.169.70 – 10.2.169.71	10.2.169.71
37	10.2.169.72/31	10.2.169.72 – 10.2.169.73	10.2.169.73
38	10.2.169.74/31	10.2.169.74 – 10.2.169.75	10.2.169.75
39	10.2.169.76/31	10.2.169.76 – 10.2.169.77	10.2.169.77
40	10.2.169.78/31	10.2.169.78 – 10.2.169.79	10.2.169.79
41	10.2.169.80/31	10.2.169.80 – 10.2.169.81	10.2.169.81
42	10.2.169.82/31	10.2.169.82 – 10.2.169.83	10.2.169.83
43	10.2.169.84/31	10.2.169.84 – 10.2.169.85	10.2.169.85
44	10.2.169.86/31	10.2.169.86 – 10.2.169.87	10.2.169.87
45	10.2.169.88/31	10.2.169.88 – 10.2.169.89	10.2.169.89
46	10.2.169.90/31	10.2.169.90 – 10.2.169.91	10.2.169.91
47	10.2.169.92/31	10.2.169.92 – 10.2.169.93	10.2.169.93
48	10.2.169.94/31	10.2.169.94 – 10.2.169.95	10.2.169.95
49	10.2.169.96/31	10.2.169.96 – 10.2.169.97	10.2.169.97
50	10.2.169.98/31	10.2.169.98 – 10.2.169.99	10.2.169.99
51	10.2.169.100/31	10.2.169.100 – 10.2.169.101	10.2.169.101
52	10.2.169.102/31	10.2.169.102 – 10.2.169.103	10.2.169.103
53	10.2.169.104/31	10.2.169.104 – 10.2.169.105	10.2.169.105
54	10.2.169.106/31	10.2.169.106 – 10.2.169.107	10.2.169.107
55	10.2.169.108/31	10.2.169.108 – 10.2.169.109	10.2.169.109
56	10.2.169.110/31	10.2.169.110 – 10.2.169.111	10.2.169.111
57	10.2.169.112/31	10.2.169.112 – 10.2.169.113	10.2.169.113
58	10.2.169.114/31	10.2.169.114 – 10.2.169.115	10.2.169.115
59	10.2.169.116/31	10.2.169.116 – 10.2.169.117	10.2.169.117
60	10.2.169.118/31	10.2.169.118 – 10.2.169.119	10.2.169.119
61	10.2.169.120/31	10.2.169.120 – 10.2.169.121	10.2.169.121
62	10.2.169.122/31	10.2.169.122 – 10.2.169.123	10.2.169.123
63	10.2.169.124/31	10.2.169.124 – 10.2.169.125	10.2.169.125
64	10.2.169.126/31	10.2.169.126 – 10.2.169.127	10.2.169.127
65	10.2.169.128/31	10.2.169.128 – 10.2.169.129	10.2.169.129
66	10.2.169.130/31	10.2.169.130 – 10.2.169.131	10.2.169.131
67	10.2.169.132/31	10.2.169.132 – 10.2.169.133	10.2.169.133
68	10.2.169.134/31	10.2.169.134 – 10.2.169.135	10.2.169.135
69	10.2.169.136/31	10.2.169.136 – 10.2.169.137	10.2.169.137
70	10.2.169.138/31	10.2.169.138 – 10.2.169.139	10.2.169.139
71	10.2.169.140/31	10.2.169.140 – 10.2.169.141	10.2.169.141
72	10.2.169.142/31	10.2.169.142 – 10.2.169.143	10.2.169.143
73	10.2.169.144/31	10.2.169.144 – 10.2.169.145	10.2.169.145
74	10.2.169.146/31	10.2.169.146 – 10.2.169.147	10.2.169.147
75	10.2.169.148/31	10.2.169.148 – 10.2.169.149	10.2.169.149
76	10.2.169.150/31	10.2.169.150 – 10.2.169.151	10.2.169.151
77	10.2.169.152/31	10.2.169.152 – 10.2.169.153	10.2.169.153
78	10.2.169.154/31	10.2.169.154 – 10.2.169.155	10.2.169.155
79	10.2.169.156/31	10.2.169.156 – 10.2.169.157	10.2.169.157
80	10.2.169.158/31	10.2.169.158 – 10.2.169.159	10.2.169.159
81	10.2.169.160/31	10.2.169.160 – 10.2.169.161	10.2.169.161
82	10.2.169.162/31	10.2.169.162 – 10.2.169.163	10.2.169.163
83	10.2.169.164/31	10.2.169.164 – 10.2.169.165	10.2.169.165
84	10.2.169.166/31	10.2.169.166 – 10.2.169.167	10.2.169.167
85	10.2.169.168/31	10.2.169.168 – 10.2.169.169	10.2.169.169
86	10.2.169.170/31	10.2.169.170 – 10.2.169.171	10.2.169.171
87	10.2.169.172/31	10.2.169.172 – 10.2.169.173	10.2.169.173
88	10.2.169.174/31	10.2.169.174 – 10.2.169.175	10.2.169.175
89	10.2.169.176/31	10.2.169.176 – 10.2.169.177	10.2.169.177
90	10.2.169.178/31	10.2.169.178 – 10.2.169.179	10.2.169.179
91	10.2.169.180/31	10.2.169.180 – 10.2.169.181	10.2.169.181
92	10.2.169.182/31	10.2.169.182 – 10.2.169.183	10.2.169.183
93	10.2.169.184/31	10.2.169.184 – 10.2.169.185	10.2.169.185
94	10.2.169.186/31	10.2.169.186 – 10.2.169.187	10.2.169.187
95	10.2.169.188/31	10.2.169.188 – 10.2.169.189	10.2.169.189
96	10.2.169.190/31	10.2.169.190 – 10.2.169.191	10.2.169.191
97	10.2.169.192/31	10.2.169.192 – 10.2.169.193	10.2.169.193
98	10.2.169.194/31	10.2.169.194 – 10.2.169.195	10.2.169.195
99	10.2.169.196/31	10.2.169.196 – 10.2.169.197	10.2.169.197
100	10.2.169.198/31	10.2.169.198 – 10.2.169.199	10.2.169.199
101	10.2.169.200/31	10.2.169.200 – 10.2.169.201	10.2.169.201
102	10.2.169.202/31	10.2.169.202 – 10.2.169.203	10.2.169.203
103	10.2.169.204/31	10.2.169.204 – 10.2.169.205	10.2.169.205
104	10.2.169.206/31	10.2.169.206 – 10.2.169.207	10.2.169.207
105	10.2.169.208/31	10.2.169.208 – 10.2.169.209	10.2.169.209
106	10.2.169.210/31	10.2.169.210 – 10.2.169.211	10.2.169.211
107	10.2.169.212/31	10.2.169.212 – 10.2.169.213	10.2.169.213
108	10.2.169.214/31	10.2.169.214 – 10.2.169.215	10.2.169.215
109	10.2.169.216/31	10.2.169.216 – 10.2.169.217	10.2.169.217
110	10.2.169.218/31	10.2.169.218 – 10.2.169.219	10.2.169.219
111	10.2.169.220/31	10.2.169.220 – 10.2.169.221	10.2.169.221
112	10.2.169.222/31	10.2.169.222 – 10.2.169.223	10.2.169.223
113	10.2.169.224/31	10.2.169.224 – 10.2.169.225	10.2.169.225
114	10.2.169.226/31	10.2.169.226 – 10.2.169.227	10.2.169.227
115	10.2.169.228/31	10.2.169.228 – 10.2.169.229	10.2.169.229
116	10.2.169.230/31	10.2.169.230 – 10.2.169.231	10.2.169.231
117	10.2.169.232/31	10.2.169.232 – 10.2.169.233	10.2.169.233
118	10.2.169.234/31	10.2.169.234 – 10.2.169.235	10.2.169.235
119	10.2.169.236/31	10.2.169.236 – 10.2.169.237	10.2.169.237
120	10.2.169.238/31	10.2.169.238 – 10.2.169.239	10.2.169.239
121	10.2.169.240/31	10.2.169.240 – 10.2.169.241	10.2.169.241
122	10.2.169.242/31	10.2.169.242 – 10.2.169.243	10.2.169.243
123	10.2.169.244/31	10.2.169.244 – 10.2.169.245	10.2.169.245
124	10.2.169.246/31	10.2.169.246 – 10.2.169.247	10.2.169.247
125	10.2.169.248/31	10.2.169.248 – 10.2.169.249	10.2.169.249
126	10.2.169.250/31	10.2.169.250 – 10.2.169.251	10.2.169.251
127	10.2.169.252/31	10.2.169.252 – 10.2.169.253	10.2.169.253
128	10.2.169.254/31	10.2.169.254 – 10.2.169.255	10.2.169.255

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 →