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)10.149.97.0/24

network10.149.97.0/24

broadcast10.149.97.255

first host10.149.97.1

last host10.149.97.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.149.97.0/24

address00001010.10010101.01100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10010101.01100001.00000000

broadcast00001010.10010101.01100001.11111111

green = network part, grey = host part

hex0x0a956100

decimal177561856

reverse dns0.97.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:6100

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.149.97.0/31	10.149.97.0 – 10.149.97.1	10.149.97.1
2	10.149.97.2/31	10.149.97.2 – 10.149.97.3	10.149.97.3
3	10.149.97.4/31	10.149.97.4 – 10.149.97.5	10.149.97.5
4	10.149.97.6/31	10.149.97.6 – 10.149.97.7	10.149.97.7
5	10.149.97.8/31	10.149.97.8 – 10.149.97.9	10.149.97.9
6	10.149.97.10/31	10.149.97.10 – 10.149.97.11	10.149.97.11
7	10.149.97.12/31	10.149.97.12 – 10.149.97.13	10.149.97.13
8	10.149.97.14/31	10.149.97.14 – 10.149.97.15	10.149.97.15
9	10.149.97.16/31	10.149.97.16 – 10.149.97.17	10.149.97.17
10	10.149.97.18/31	10.149.97.18 – 10.149.97.19	10.149.97.19
11	10.149.97.20/31	10.149.97.20 – 10.149.97.21	10.149.97.21
12	10.149.97.22/31	10.149.97.22 – 10.149.97.23	10.149.97.23
13	10.149.97.24/31	10.149.97.24 – 10.149.97.25	10.149.97.25
14	10.149.97.26/31	10.149.97.26 – 10.149.97.27	10.149.97.27
15	10.149.97.28/31	10.149.97.28 – 10.149.97.29	10.149.97.29
16	10.149.97.30/31	10.149.97.30 – 10.149.97.31	10.149.97.31
17	10.149.97.32/31	10.149.97.32 – 10.149.97.33	10.149.97.33
18	10.149.97.34/31	10.149.97.34 – 10.149.97.35	10.149.97.35
19	10.149.97.36/31	10.149.97.36 – 10.149.97.37	10.149.97.37
20	10.149.97.38/31	10.149.97.38 – 10.149.97.39	10.149.97.39
21	10.149.97.40/31	10.149.97.40 – 10.149.97.41	10.149.97.41
22	10.149.97.42/31	10.149.97.42 – 10.149.97.43	10.149.97.43
23	10.149.97.44/31	10.149.97.44 – 10.149.97.45	10.149.97.45
24	10.149.97.46/31	10.149.97.46 – 10.149.97.47	10.149.97.47
25	10.149.97.48/31	10.149.97.48 – 10.149.97.49	10.149.97.49
26	10.149.97.50/31	10.149.97.50 – 10.149.97.51	10.149.97.51
27	10.149.97.52/31	10.149.97.52 – 10.149.97.53	10.149.97.53
28	10.149.97.54/31	10.149.97.54 – 10.149.97.55	10.149.97.55
29	10.149.97.56/31	10.149.97.56 – 10.149.97.57	10.149.97.57
30	10.149.97.58/31	10.149.97.58 – 10.149.97.59	10.149.97.59
31	10.149.97.60/31	10.149.97.60 – 10.149.97.61	10.149.97.61
32	10.149.97.62/31	10.149.97.62 – 10.149.97.63	10.149.97.63
33	10.149.97.64/31	10.149.97.64 – 10.149.97.65	10.149.97.65
34	10.149.97.66/31	10.149.97.66 – 10.149.97.67	10.149.97.67
35	10.149.97.68/31	10.149.97.68 – 10.149.97.69	10.149.97.69
36	10.149.97.70/31	10.149.97.70 – 10.149.97.71	10.149.97.71
37	10.149.97.72/31	10.149.97.72 – 10.149.97.73	10.149.97.73
38	10.149.97.74/31	10.149.97.74 – 10.149.97.75	10.149.97.75
39	10.149.97.76/31	10.149.97.76 – 10.149.97.77	10.149.97.77
40	10.149.97.78/31	10.149.97.78 – 10.149.97.79	10.149.97.79
41	10.149.97.80/31	10.149.97.80 – 10.149.97.81	10.149.97.81
42	10.149.97.82/31	10.149.97.82 – 10.149.97.83	10.149.97.83
43	10.149.97.84/31	10.149.97.84 – 10.149.97.85	10.149.97.85
44	10.149.97.86/31	10.149.97.86 – 10.149.97.87	10.149.97.87
45	10.149.97.88/31	10.149.97.88 – 10.149.97.89	10.149.97.89
46	10.149.97.90/31	10.149.97.90 – 10.149.97.91	10.149.97.91
47	10.149.97.92/31	10.149.97.92 – 10.149.97.93	10.149.97.93
48	10.149.97.94/31	10.149.97.94 – 10.149.97.95	10.149.97.95
49	10.149.97.96/31	10.149.97.96 – 10.149.97.97	10.149.97.97
50	10.149.97.98/31	10.149.97.98 – 10.149.97.99	10.149.97.99
51	10.149.97.100/31	10.149.97.100 – 10.149.97.101	10.149.97.101
52	10.149.97.102/31	10.149.97.102 – 10.149.97.103	10.149.97.103
53	10.149.97.104/31	10.149.97.104 – 10.149.97.105	10.149.97.105
54	10.149.97.106/31	10.149.97.106 – 10.149.97.107	10.149.97.107
55	10.149.97.108/31	10.149.97.108 – 10.149.97.109	10.149.97.109
56	10.149.97.110/31	10.149.97.110 – 10.149.97.111	10.149.97.111
57	10.149.97.112/31	10.149.97.112 – 10.149.97.113	10.149.97.113
58	10.149.97.114/31	10.149.97.114 – 10.149.97.115	10.149.97.115
59	10.149.97.116/31	10.149.97.116 – 10.149.97.117	10.149.97.117
60	10.149.97.118/31	10.149.97.118 – 10.149.97.119	10.149.97.119
61	10.149.97.120/31	10.149.97.120 – 10.149.97.121	10.149.97.121
62	10.149.97.122/31	10.149.97.122 – 10.149.97.123	10.149.97.123
63	10.149.97.124/31	10.149.97.124 – 10.149.97.125	10.149.97.125
64	10.149.97.126/31	10.149.97.126 – 10.149.97.127	10.149.97.127
65	10.149.97.128/31	10.149.97.128 – 10.149.97.129	10.149.97.129
66	10.149.97.130/31	10.149.97.130 – 10.149.97.131	10.149.97.131
67	10.149.97.132/31	10.149.97.132 – 10.149.97.133	10.149.97.133
68	10.149.97.134/31	10.149.97.134 – 10.149.97.135	10.149.97.135
69	10.149.97.136/31	10.149.97.136 – 10.149.97.137	10.149.97.137
70	10.149.97.138/31	10.149.97.138 – 10.149.97.139	10.149.97.139
71	10.149.97.140/31	10.149.97.140 – 10.149.97.141	10.149.97.141
72	10.149.97.142/31	10.149.97.142 – 10.149.97.143	10.149.97.143
73	10.149.97.144/31	10.149.97.144 – 10.149.97.145	10.149.97.145
74	10.149.97.146/31	10.149.97.146 – 10.149.97.147	10.149.97.147
75	10.149.97.148/31	10.149.97.148 – 10.149.97.149	10.149.97.149
76	10.149.97.150/31	10.149.97.150 – 10.149.97.151	10.149.97.151
77	10.149.97.152/31	10.149.97.152 – 10.149.97.153	10.149.97.153
78	10.149.97.154/31	10.149.97.154 – 10.149.97.155	10.149.97.155
79	10.149.97.156/31	10.149.97.156 – 10.149.97.157	10.149.97.157
80	10.149.97.158/31	10.149.97.158 – 10.149.97.159	10.149.97.159
81	10.149.97.160/31	10.149.97.160 – 10.149.97.161	10.149.97.161
82	10.149.97.162/31	10.149.97.162 – 10.149.97.163	10.149.97.163
83	10.149.97.164/31	10.149.97.164 – 10.149.97.165	10.149.97.165
84	10.149.97.166/31	10.149.97.166 – 10.149.97.167	10.149.97.167
85	10.149.97.168/31	10.149.97.168 – 10.149.97.169	10.149.97.169
86	10.149.97.170/31	10.149.97.170 – 10.149.97.171	10.149.97.171
87	10.149.97.172/31	10.149.97.172 – 10.149.97.173	10.149.97.173
88	10.149.97.174/31	10.149.97.174 – 10.149.97.175	10.149.97.175
89	10.149.97.176/31	10.149.97.176 – 10.149.97.177	10.149.97.177
90	10.149.97.178/31	10.149.97.178 – 10.149.97.179	10.149.97.179
91	10.149.97.180/31	10.149.97.180 – 10.149.97.181	10.149.97.181
92	10.149.97.182/31	10.149.97.182 – 10.149.97.183	10.149.97.183
93	10.149.97.184/31	10.149.97.184 – 10.149.97.185	10.149.97.185
94	10.149.97.186/31	10.149.97.186 – 10.149.97.187	10.149.97.187
95	10.149.97.188/31	10.149.97.188 – 10.149.97.189	10.149.97.189
96	10.149.97.190/31	10.149.97.190 – 10.149.97.191	10.149.97.191
97	10.149.97.192/31	10.149.97.192 – 10.149.97.193	10.149.97.193
98	10.149.97.194/31	10.149.97.194 – 10.149.97.195	10.149.97.195
99	10.149.97.196/31	10.149.97.196 – 10.149.97.197	10.149.97.197
100	10.149.97.198/31	10.149.97.198 – 10.149.97.199	10.149.97.199
101	10.149.97.200/31	10.149.97.200 – 10.149.97.201	10.149.97.201
102	10.149.97.202/31	10.149.97.202 – 10.149.97.203	10.149.97.203
103	10.149.97.204/31	10.149.97.204 – 10.149.97.205	10.149.97.205
104	10.149.97.206/31	10.149.97.206 – 10.149.97.207	10.149.97.207
105	10.149.97.208/31	10.149.97.208 – 10.149.97.209	10.149.97.209
106	10.149.97.210/31	10.149.97.210 – 10.149.97.211	10.149.97.211
107	10.149.97.212/31	10.149.97.212 – 10.149.97.213	10.149.97.213
108	10.149.97.214/31	10.149.97.214 – 10.149.97.215	10.149.97.215
109	10.149.97.216/31	10.149.97.216 – 10.149.97.217	10.149.97.217
110	10.149.97.218/31	10.149.97.218 – 10.149.97.219	10.149.97.219
111	10.149.97.220/31	10.149.97.220 – 10.149.97.221	10.149.97.221
112	10.149.97.222/31	10.149.97.222 – 10.149.97.223	10.149.97.223
113	10.149.97.224/31	10.149.97.224 – 10.149.97.225	10.149.97.225
114	10.149.97.226/31	10.149.97.226 – 10.149.97.227	10.149.97.227
115	10.149.97.228/31	10.149.97.228 – 10.149.97.229	10.149.97.229
116	10.149.97.230/31	10.149.97.230 – 10.149.97.231	10.149.97.231
117	10.149.97.232/31	10.149.97.232 – 10.149.97.233	10.149.97.233
118	10.149.97.234/31	10.149.97.234 – 10.149.97.235	10.149.97.235
119	10.149.97.236/31	10.149.97.236 – 10.149.97.237	10.149.97.237
120	10.149.97.238/31	10.149.97.238 – 10.149.97.239	10.149.97.239
121	10.149.97.240/31	10.149.97.240 – 10.149.97.241	10.149.97.241
122	10.149.97.242/31	10.149.97.242 – 10.149.97.243	10.149.97.243
123	10.149.97.244/31	10.149.97.244 – 10.149.97.245	10.149.97.245
124	10.149.97.246/31	10.149.97.246 – 10.149.97.247	10.149.97.247
125	10.149.97.248/31	10.149.97.248 – 10.149.97.249	10.149.97.249
126	10.149.97.250/31	10.149.97.250 – 10.149.97.251	10.149.97.251
127	10.149.97.252/31	10.149.97.252 – 10.149.97.253	10.149.97.253
128	10.149.97.254/31	10.149.97.254 – 10.149.97.255	10.149.97.255

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 →