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)10.2.174.0/23

network10.2.174.0/23

broadcast10.2.175.255

first host10.2.174.1

last host10.2.175.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.174.0/23

address00001010.00000010.10101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.10101110.00000000

broadcast00001010.00000010.10101111.11111111

green = network part, grey = host part

hex0x0a02ae00

decimal167947776

reverse dns0.174.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:ae00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.174.0/30	10.2.174.1 – 10.2.174.2	10.2.174.3
2	10.2.174.4/30	10.2.174.5 – 10.2.174.6	10.2.174.7
3	10.2.174.8/30	10.2.174.9 – 10.2.174.10	10.2.174.11
4	10.2.174.12/30	10.2.174.13 – 10.2.174.14	10.2.174.15
5	10.2.174.16/30	10.2.174.17 – 10.2.174.18	10.2.174.19
6	10.2.174.20/30	10.2.174.21 – 10.2.174.22	10.2.174.23
7	10.2.174.24/30	10.2.174.25 – 10.2.174.26	10.2.174.27
8	10.2.174.28/30	10.2.174.29 – 10.2.174.30	10.2.174.31
9	10.2.174.32/30	10.2.174.33 – 10.2.174.34	10.2.174.35
10	10.2.174.36/30	10.2.174.37 – 10.2.174.38	10.2.174.39
11	10.2.174.40/30	10.2.174.41 – 10.2.174.42	10.2.174.43
12	10.2.174.44/30	10.2.174.45 – 10.2.174.46	10.2.174.47
13	10.2.174.48/30	10.2.174.49 – 10.2.174.50	10.2.174.51
14	10.2.174.52/30	10.2.174.53 – 10.2.174.54	10.2.174.55
15	10.2.174.56/30	10.2.174.57 – 10.2.174.58	10.2.174.59
16	10.2.174.60/30	10.2.174.61 – 10.2.174.62	10.2.174.63
17	10.2.174.64/30	10.2.174.65 – 10.2.174.66	10.2.174.67
18	10.2.174.68/30	10.2.174.69 – 10.2.174.70	10.2.174.71
19	10.2.174.72/30	10.2.174.73 – 10.2.174.74	10.2.174.75
20	10.2.174.76/30	10.2.174.77 – 10.2.174.78	10.2.174.79
21	10.2.174.80/30	10.2.174.81 – 10.2.174.82	10.2.174.83
22	10.2.174.84/30	10.2.174.85 – 10.2.174.86	10.2.174.87
23	10.2.174.88/30	10.2.174.89 – 10.2.174.90	10.2.174.91
24	10.2.174.92/30	10.2.174.93 – 10.2.174.94	10.2.174.95
25	10.2.174.96/30	10.2.174.97 – 10.2.174.98	10.2.174.99
26	10.2.174.100/30	10.2.174.101 – 10.2.174.102	10.2.174.103
27	10.2.174.104/30	10.2.174.105 – 10.2.174.106	10.2.174.107
28	10.2.174.108/30	10.2.174.109 – 10.2.174.110	10.2.174.111
29	10.2.174.112/30	10.2.174.113 – 10.2.174.114	10.2.174.115
30	10.2.174.116/30	10.2.174.117 – 10.2.174.118	10.2.174.119
31	10.2.174.120/30	10.2.174.121 – 10.2.174.122	10.2.174.123
32	10.2.174.124/30	10.2.174.125 – 10.2.174.126	10.2.174.127
33	10.2.174.128/30	10.2.174.129 – 10.2.174.130	10.2.174.131
34	10.2.174.132/30	10.2.174.133 – 10.2.174.134	10.2.174.135
35	10.2.174.136/30	10.2.174.137 – 10.2.174.138	10.2.174.139
36	10.2.174.140/30	10.2.174.141 – 10.2.174.142	10.2.174.143
37	10.2.174.144/30	10.2.174.145 – 10.2.174.146	10.2.174.147
38	10.2.174.148/30	10.2.174.149 – 10.2.174.150	10.2.174.151
39	10.2.174.152/30	10.2.174.153 – 10.2.174.154	10.2.174.155
40	10.2.174.156/30	10.2.174.157 – 10.2.174.158	10.2.174.159
41	10.2.174.160/30	10.2.174.161 – 10.2.174.162	10.2.174.163
42	10.2.174.164/30	10.2.174.165 – 10.2.174.166	10.2.174.167
43	10.2.174.168/30	10.2.174.169 – 10.2.174.170	10.2.174.171
44	10.2.174.172/30	10.2.174.173 – 10.2.174.174	10.2.174.175
45	10.2.174.176/30	10.2.174.177 – 10.2.174.178	10.2.174.179
46	10.2.174.180/30	10.2.174.181 – 10.2.174.182	10.2.174.183
47	10.2.174.184/30	10.2.174.185 – 10.2.174.186	10.2.174.187
48	10.2.174.188/30	10.2.174.189 – 10.2.174.190	10.2.174.191
49	10.2.174.192/30	10.2.174.193 – 10.2.174.194	10.2.174.195
50	10.2.174.196/30	10.2.174.197 – 10.2.174.198	10.2.174.199
51	10.2.174.200/30	10.2.174.201 – 10.2.174.202	10.2.174.203
52	10.2.174.204/30	10.2.174.205 – 10.2.174.206	10.2.174.207
53	10.2.174.208/30	10.2.174.209 – 10.2.174.210	10.2.174.211
54	10.2.174.212/30	10.2.174.213 – 10.2.174.214	10.2.174.215
55	10.2.174.216/30	10.2.174.217 – 10.2.174.218	10.2.174.219
56	10.2.174.220/30	10.2.174.221 – 10.2.174.222	10.2.174.223
57	10.2.174.224/30	10.2.174.225 – 10.2.174.226	10.2.174.227
58	10.2.174.228/30	10.2.174.229 – 10.2.174.230	10.2.174.231
59	10.2.174.232/30	10.2.174.233 – 10.2.174.234	10.2.174.235
60	10.2.174.236/30	10.2.174.237 – 10.2.174.238	10.2.174.239
61	10.2.174.240/30	10.2.174.241 – 10.2.174.242	10.2.174.243
62	10.2.174.244/30	10.2.174.245 – 10.2.174.246	10.2.174.247
63	10.2.174.248/30	10.2.174.249 – 10.2.174.250	10.2.174.251
64	10.2.174.252/30	10.2.174.253 – 10.2.174.254	10.2.174.255
65	10.2.175.0/30	10.2.175.1 – 10.2.175.2	10.2.175.3
66	10.2.175.4/30	10.2.175.5 – 10.2.175.6	10.2.175.7
67	10.2.175.8/30	10.2.175.9 – 10.2.175.10	10.2.175.11
68	10.2.175.12/30	10.2.175.13 – 10.2.175.14	10.2.175.15
69	10.2.175.16/30	10.2.175.17 – 10.2.175.18	10.2.175.19
70	10.2.175.20/30	10.2.175.21 – 10.2.175.22	10.2.175.23
71	10.2.175.24/30	10.2.175.25 – 10.2.175.26	10.2.175.27
72	10.2.175.28/30	10.2.175.29 – 10.2.175.30	10.2.175.31
73	10.2.175.32/30	10.2.175.33 – 10.2.175.34	10.2.175.35
74	10.2.175.36/30	10.2.175.37 – 10.2.175.38	10.2.175.39
75	10.2.175.40/30	10.2.175.41 – 10.2.175.42	10.2.175.43
76	10.2.175.44/30	10.2.175.45 – 10.2.175.46	10.2.175.47
77	10.2.175.48/30	10.2.175.49 – 10.2.175.50	10.2.175.51
78	10.2.175.52/30	10.2.175.53 – 10.2.175.54	10.2.175.55
79	10.2.175.56/30	10.2.175.57 – 10.2.175.58	10.2.175.59
80	10.2.175.60/30	10.2.175.61 – 10.2.175.62	10.2.175.63
81	10.2.175.64/30	10.2.175.65 – 10.2.175.66	10.2.175.67
82	10.2.175.68/30	10.2.175.69 – 10.2.175.70	10.2.175.71
83	10.2.175.72/30	10.2.175.73 – 10.2.175.74	10.2.175.75
84	10.2.175.76/30	10.2.175.77 – 10.2.175.78	10.2.175.79
85	10.2.175.80/30	10.2.175.81 – 10.2.175.82	10.2.175.83
86	10.2.175.84/30	10.2.175.85 – 10.2.175.86	10.2.175.87
87	10.2.175.88/30	10.2.175.89 – 10.2.175.90	10.2.175.91
88	10.2.175.92/30	10.2.175.93 – 10.2.175.94	10.2.175.95
89	10.2.175.96/30	10.2.175.97 – 10.2.175.98	10.2.175.99
90	10.2.175.100/30	10.2.175.101 – 10.2.175.102	10.2.175.103
91	10.2.175.104/30	10.2.175.105 – 10.2.175.106	10.2.175.107
92	10.2.175.108/30	10.2.175.109 – 10.2.175.110	10.2.175.111
93	10.2.175.112/30	10.2.175.113 – 10.2.175.114	10.2.175.115
94	10.2.175.116/30	10.2.175.117 – 10.2.175.118	10.2.175.119
95	10.2.175.120/30	10.2.175.121 – 10.2.175.122	10.2.175.123
96	10.2.175.124/30	10.2.175.125 – 10.2.175.126	10.2.175.127
97	10.2.175.128/30	10.2.175.129 – 10.2.175.130	10.2.175.131
98	10.2.175.132/30	10.2.175.133 – 10.2.175.134	10.2.175.135
99	10.2.175.136/30	10.2.175.137 – 10.2.175.138	10.2.175.139
100	10.2.175.140/30	10.2.175.141 – 10.2.175.142	10.2.175.143
101	10.2.175.144/30	10.2.175.145 – 10.2.175.146	10.2.175.147
102	10.2.175.148/30	10.2.175.149 – 10.2.175.150	10.2.175.151
103	10.2.175.152/30	10.2.175.153 – 10.2.175.154	10.2.175.155
104	10.2.175.156/30	10.2.175.157 – 10.2.175.158	10.2.175.159
105	10.2.175.160/30	10.2.175.161 – 10.2.175.162	10.2.175.163
106	10.2.175.164/30	10.2.175.165 – 10.2.175.166	10.2.175.167
107	10.2.175.168/30	10.2.175.169 – 10.2.175.170	10.2.175.171
108	10.2.175.172/30	10.2.175.173 – 10.2.175.174	10.2.175.175
109	10.2.175.176/30	10.2.175.177 – 10.2.175.178	10.2.175.179
110	10.2.175.180/30	10.2.175.181 – 10.2.175.182	10.2.175.183
111	10.2.175.184/30	10.2.175.185 – 10.2.175.186	10.2.175.187
112	10.2.175.188/30	10.2.175.189 – 10.2.175.190	10.2.175.191
113	10.2.175.192/30	10.2.175.193 – 10.2.175.194	10.2.175.195
114	10.2.175.196/30	10.2.175.197 – 10.2.175.198	10.2.175.199
115	10.2.175.200/30	10.2.175.201 – 10.2.175.202	10.2.175.203
116	10.2.175.204/30	10.2.175.205 – 10.2.175.206	10.2.175.207
117	10.2.175.208/30	10.2.175.209 – 10.2.175.210	10.2.175.211
118	10.2.175.212/30	10.2.175.213 – 10.2.175.214	10.2.175.215
119	10.2.175.216/30	10.2.175.217 – 10.2.175.218	10.2.175.219
120	10.2.175.220/30	10.2.175.221 – 10.2.175.222	10.2.175.223
121	10.2.175.224/30	10.2.175.225 – 10.2.175.226	10.2.175.227
122	10.2.175.228/30	10.2.175.229 – 10.2.175.230	10.2.175.231
123	10.2.175.232/30	10.2.175.233 – 10.2.175.234	10.2.175.235
124	10.2.175.236/30	10.2.175.237 – 10.2.175.238	10.2.175.239
125	10.2.175.240/30	10.2.175.241 – 10.2.175.242	10.2.175.243
126	10.2.175.244/30	10.2.175.245 – 10.2.175.246	10.2.175.247
127	10.2.175.248/30	10.2.175.249 – 10.2.175.250	10.2.175.251
128	10.2.175.252/30	10.2.175.253 – 10.2.175.254	10.2.175.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →