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)10.0.174.0/23

network10.0.174.0/23

broadcast10.0.175.255

first host10.0.174.1

last host10.0.175.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.174.0/23

address00001010.00000000.10101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.10101110.00000000

broadcast00001010.00000000.10101111.11111111

green = network part, grey = host part

hex0x0a00ae00

decimal167816704

reverse dns0.174.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:ae00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.174.0/30	10.0.174.1 – 10.0.174.2	10.0.174.3
2	10.0.174.4/30	10.0.174.5 – 10.0.174.6	10.0.174.7
3	10.0.174.8/30	10.0.174.9 – 10.0.174.10	10.0.174.11
4	10.0.174.12/30	10.0.174.13 – 10.0.174.14	10.0.174.15
5	10.0.174.16/30	10.0.174.17 – 10.0.174.18	10.0.174.19
6	10.0.174.20/30	10.0.174.21 – 10.0.174.22	10.0.174.23
7	10.0.174.24/30	10.0.174.25 – 10.0.174.26	10.0.174.27
8	10.0.174.28/30	10.0.174.29 – 10.0.174.30	10.0.174.31
9	10.0.174.32/30	10.0.174.33 – 10.0.174.34	10.0.174.35
10	10.0.174.36/30	10.0.174.37 – 10.0.174.38	10.0.174.39
11	10.0.174.40/30	10.0.174.41 – 10.0.174.42	10.0.174.43
12	10.0.174.44/30	10.0.174.45 – 10.0.174.46	10.0.174.47
13	10.0.174.48/30	10.0.174.49 – 10.0.174.50	10.0.174.51
14	10.0.174.52/30	10.0.174.53 – 10.0.174.54	10.0.174.55
15	10.0.174.56/30	10.0.174.57 – 10.0.174.58	10.0.174.59
16	10.0.174.60/30	10.0.174.61 – 10.0.174.62	10.0.174.63
17	10.0.174.64/30	10.0.174.65 – 10.0.174.66	10.0.174.67
18	10.0.174.68/30	10.0.174.69 – 10.0.174.70	10.0.174.71
19	10.0.174.72/30	10.0.174.73 – 10.0.174.74	10.0.174.75
20	10.0.174.76/30	10.0.174.77 – 10.0.174.78	10.0.174.79
21	10.0.174.80/30	10.0.174.81 – 10.0.174.82	10.0.174.83
22	10.0.174.84/30	10.0.174.85 – 10.0.174.86	10.0.174.87
23	10.0.174.88/30	10.0.174.89 – 10.0.174.90	10.0.174.91
24	10.0.174.92/30	10.0.174.93 – 10.0.174.94	10.0.174.95
25	10.0.174.96/30	10.0.174.97 – 10.0.174.98	10.0.174.99
26	10.0.174.100/30	10.0.174.101 – 10.0.174.102	10.0.174.103
27	10.0.174.104/30	10.0.174.105 – 10.0.174.106	10.0.174.107
28	10.0.174.108/30	10.0.174.109 – 10.0.174.110	10.0.174.111
29	10.0.174.112/30	10.0.174.113 – 10.0.174.114	10.0.174.115
30	10.0.174.116/30	10.0.174.117 – 10.0.174.118	10.0.174.119
31	10.0.174.120/30	10.0.174.121 – 10.0.174.122	10.0.174.123
32	10.0.174.124/30	10.0.174.125 – 10.0.174.126	10.0.174.127
33	10.0.174.128/30	10.0.174.129 – 10.0.174.130	10.0.174.131
34	10.0.174.132/30	10.0.174.133 – 10.0.174.134	10.0.174.135
35	10.0.174.136/30	10.0.174.137 – 10.0.174.138	10.0.174.139
36	10.0.174.140/30	10.0.174.141 – 10.0.174.142	10.0.174.143
37	10.0.174.144/30	10.0.174.145 – 10.0.174.146	10.0.174.147
38	10.0.174.148/30	10.0.174.149 – 10.0.174.150	10.0.174.151
39	10.0.174.152/30	10.0.174.153 – 10.0.174.154	10.0.174.155
40	10.0.174.156/30	10.0.174.157 – 10.0.174.158	10.0.174.159
41	10.0.174.160/30	10.0.174.161 – 10.0.174.162	10.0.174.163
42	10.0.174.164/30	10.0.174.165 – 10.0.174.166	10.0.174.167
43	10.0.174.168/30	10.0.174.169 – 10.0.174.170	10.0.174.171
44	10.0.174.172/30	10.0.174.173 – 10.0.174.174	10.0.174.175
45	10.0.174.176/30	10.0.174.177 – 10.0.174.178	10.0.174.179
46	10.0.174.180/30	10.0.174.181 – 10.0.174.182	10.0.174.183
47	10.0.174.184/30	10.0.174.185 – 10.0.174.186	10.0.174.187
48	10.0.174.188/30	10.0.174.189 – 10.0.174.190	10.0.174.191
49	10.0.174.192/30	10.0.174.193 – 10.0.174.194	10.0.174.195
50	10.0.174.196/30	10.0.174.197 – 10.0.174.198	10.0.174.199
51	10.0.174.200/30	10.0.174.201 – 10.0.174.202	10.0.174.203
52	10.0.174.204/30	10.0.174.205 – 10.0.174.206	10.0.174.207
53	10.0.174.208/30	10.0.174.209 – 10.0.174.210	10.0.174.211
54	10.0.174.212/30	10.0.174.213 – 10.0.174.214	10.0.174.215
55	10.0.174.216/30	10.0.174.217 – 10.0.174.218	10.0.174.219
56	10.0.174.220/30	10.0.174.221 – 10.0.174.222	10.0.174.223
57	10.0.174.224/30	10.0.174.225 – 10.0.174.226	10.0.174.227
58	10.0.174.228/30	10.0.174.229 – 10.0.174.230	10.0.174.231
59	10.0.174.232/30	10.0.174.233 – 10.0.174.234	10.0.174.235
60	10.0.174.236/30	10.0.174.237 – 10.0.174.238	10.0.174.239
61	10.0.174.240/30	10.0.174.241 – 10.0.174.242	10.0.174.243
62	10.0.174.244/30	10.0.174.245 – 10.0.174.246	10.0.174.247
63	10.0.174.248/30	10.0.174.249 – 10.0.174.250	10.0.174.251
64	10.0.174.252/30	10.0.174.253 – 10.0.174.254	10.0.174.255
65	10.0.175.0/30	10.0.175.1 – 10.0.175.2	10.0.175.3
66	10.0.175.4/30	10.0.175.5 – 10.0.175.6	10.0.175.7
67	10.0.175.8/30	10.0.175.9 – 10.0.175.10	10.0.175.11
68	10.0.175.12/30	10.0.175.13 – 10.0.175.14	10.0.175.15
69	10.0.175.16/30	10.0.175.17 – 10.0.175.18	10.0.175.19
70	10.0.175.20/30	10.0.175.21 – 10.0.175.22	10.0.175.23
71	10.0.175.24/30	10.0.175.25 – 10.0.175.26	10.0.175.27
72	10.0.175.28/30	10.0.175.29 – 10.0.175.30	10.0.175.31
73	10.0.175.32/30	10.0.175.33 – 10.0.175.34	10.0.175.35
74	10.0.175.36/30	10.0.175.37 – 10.0.175.38	10.0.175.39
75	10.0.175.40/30	10.0.175.41 – 10.0.175.42	10.0.175.43
76	10.0.175.44/30	10.0.175.45 – 10.0.175.46	10.0.175.47
77	10.0.175.48/30	10.0.175.49 – 10.0.175.50	10.0.175.51
78	10.0.175.52/30	10.0.175.53 – 10.0.175.54	10.0.175.55
79	10.0.175.56/30	10.0.175.57 – 10.0.175.58	10.0.175.59
80	10.0.175.60/30	10.0.175.61 – 10.0.175.62	10.0.175.63
81	10.0.175.64/30	10.0.175.65 – 10.0.175.66	10.0.175.67
82	10.0.175.68/30	10.0.175.69 – 10.0.175.70	10.0.175.71
83	10.0.175.72/30	10.0.175.73 – 10.0.175.74	10.0.175.75
84	10.0.175.76/30	10.0.175.77 – 10.0.175.78	10.0.175.79
85	10.0.175.80/30	10.0.175.81 – 10.0.175.82	10.0.175.83
86	10.0.175.84/30	10.0.175.85 – 10.0.175.86	10.0.175.87
87	10.0.175.88/30	10.0.175.89 – 10.0.175.90	10.0.175.91
88	10.0.175.92/30	10.0.175.93 – 10.0.175.94	10.0.175.95
89	10.0.175.96/30	10.0.175.97 – 10.0.175.98	10.0.175.99
90	10.0.175.100/30	10.0.175.101 – 10.0.175.102	10.0.175.103
91	10.0.175.104/30	10.0.175.105 – 10.0.175.106	10.0.175.107
92	10.0.175.108/30	10.0.175.109 – 10.0.175.110	10.0.175.111
93	10.0.175.112/30	10.0.175.113 – 10.0.175.114	10.0.175.115
94	10.0.175.116/30	10.0.175.117 – 10.0.175.118	10.0.175.119
95	10.0.175.120/30	10.0.175.121 – 10.0.175.122	10.0.175.123
96	10.0.175.124/30	10.0.175.125 – 10.0.175.126	10.0.175.127
97	10.0.175.128/30	10.0.175.129 – 10.0.175.130	10.0.175.131
98	10.0.175.132/30	10.0.175.133 – 10.0.175.134	10.0.175.135
99	10.0.175.136/30	10.0.175.137 – 10.0.175.138	10.0.175.139
100	10.0.175.140/30	10.0.175.141 – 10.0.175.142	10.0.175.143
101	10.0.175.144/30	10.0.175.145 – 10.0.175.146	10.0.175.147
102	10.0.175.148/30	10.0.175.149 – 10.0.175.150	10.0.175.151
103	10.0.175.152/30	10.0.175.153 – 10.0.175.154	10.0.175.155
104	10.0.175.156/30	10.0.175.157 – 10.0.175.158	10.0.175.159
105	10.0.175.160/30	10.0.175.161 – 10.0.175.162	10.0.175.163
106	10.0.175.164/30	10.0.175.165 – 10.0.175.166	10.0.175.167
107	10.0.175.168/30	10.0.175.169 – 10.0.175.170	10.0.175.171
108	10.0.175.172/30	10.0.175.173 – 10.0.175.174	10.0.175.175
109	10.0.175.176/30	10.0.175.177 – 10.0.175.178	10.0.175.179
110	10.0.175.180/30	10.0.175.181 – 10.0.175.182	10.0.175.183
111	10.0.175.184/30	10.0.175.185 – 10.0.175.186	10.0.175.187
112	10.0.175.188/30	10.0.175.189 – 10.0.175.190	10.0.175.191
113	10.0.175.192/30	10.0.175.193 – 10.0.175.194	10.0.175.195
114	10.0.175.196/30	10.0.175.197 – 10.0.175.198	10.0.175.199
115	10.0.175.200/30	10.0.175.201 – 10.0.175.202	10.0.175.203
116	10.0.175.204/30	10.0.175.205 – 10.0.175.206	10.0.175.207
117	10.0.175.208/30	10.0.175.209 – 10.0.175.210	10.0.175.211
118	10.0.175.212/30	10.0.175.213 – 10.0.175.214	10.0.175.215
119	10.0.175.216/30	10.0.175.217 – 10.0.175.218	10.0.175.219
120	10.0.175.220/30	10.0.175.221 – 10.0.175.222	10.0.175.223
121	10.0.175.224/30	10.0.175.225 – 10.0.175.226	10.0.175.227
122	10.0.175.228/30	10.0.175.229 – 10.0.175.230	10.0.175.231
123	10.0.175.232/30	10.0.175.233 – 10.0.175.234	10.0.175.235
124	10.0.175.236/30	10.0.175.237 – 10.0.175.238	10.0.175.239
125	10.0.175.240/30	10.0.175.241 – 10.0.175.242	10.0.175.243
126	10.0.175.244/30	10.0.175.245 – 10.0.175.246	10.0.175.247
127	10.0.175.248/30	10.0.175.249 – 10.0.175.250	10.0.175.251
128	10.0.175.252/30	10.0.175.253 – 10.0.175.254	10.0.175.255

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 →