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)10.2.44.0/23

network10.2.44.0/23

broadcast10.2.45.255

first host10.2.44.1

last host10.2.45.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.44.0/23

address00001010.00000010.00101100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.00101100.00000000

broadcast00001010.00000010.00101101.11111111

green = network part, grey = host part

hex0x0a022c00

decimal167914496

reverse dns0.44.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:2c00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.44.0/30	10.2.44.1 – 10.2.44.2	10.2.44.3
2	10.2.44.4/30	10.2.44.5 – 10.2.44.6	10.2.44.7
3	10.2.44.8/30	10.2.44.9 – 10.2.44.10	10.2.44.11
4	10.2.44.12/30	10.2.44.13 – 10.2.44.14	10.2.44.15
5	10.2.44.16/30	10.2.44.17 – 10.2.44.18	10.2.44.19
6	10.2.44.20/30	10.2.44.21 – 10.2.44.22	10.2.44.23
7	10.2.44.24/30	10.2.44.25 – 10.2.44.26	10.2.44.27
8	10.2.44.28/30	10.2.44.29 – 10.2.44.30	10.2.44.31
9	10.2.44.32/30	10.2.44.33 – 10.2.44.34	10.2.44.35
10	10.2.44.36/30	10.2.44.37 – 10.2.44.38	10.2.44.39
11	10.2.44.40/30	10.2.44.41 – 10.2.44.42	10.2.44.43
12	10.2.44.44/30	10.2.44.45 – 10.2.44.46	10.2.44.47
13	10.2.44.48/30	10.2.44.49 – 10.2.44.50	10.2.44.51
14	10.2.44.52/30	10.2.44.53 – 10.2.44.54	10.2.44.55
15	10.2.44.56/30	10.2.44.57 – 10.2.44.58	10.2.44.59
16	10.2.44.60/30	10.2.44.61 – 10.2.44.62	10.2.44.63
17	10.2.44.64/30	10.2.44.65 – 10.2.44.66	10.2.44.67
18	10.2.44.68/30	10.2.44.69 – 10.2.44.70	10.2.44.71
19	10.2.44.72/30	10.2.44.73 – 10.2.44.74	10.2.44.75
20	10.2.44.76/30	10.2.44.77 – 10.2.44.78	10.2.44.79
21	10.2.44.80/30	10.2.44.81 – 10.2.44.82	10.2.44.83
22	10.2.44.84/30	10.2.44.85 – 10.2.44.86	10.2.44.87
23	10.2.44.88/30	10.2.44.89 – 10.2.44.90	10.2.44.91
24	10.2.44.92/30	10.2.44.93 – 10.2.44.94	10.2.44.95
25	10.2.44.96/30	10.2.44.97 – 10.2.44.98	10.2.44.99
26	10.2.44.100/30	10.2.44.101 – 10.2.44.102	10.2.44.103
27	10.2.44.104/30	10.2.44.105 – 10.2.44.106	10.2.44.107
28	10.2.44.108/30	10.2.44.109 – 10.2.44.110	10.2.44.111
29	10.2.44.112/30	10.2.44.113 – 10.2.44.114	10.2.44.115
30	10.2.44.116/30	10.2.44.117 – 10.2.44.118	10.2.44.119
31	10.2.44.120/30	10.2.44.121 – 10.2.44.122	10.2.44.123
32	10.2.44.124/30	10.2.44.125 – 10.2.44.126	10.2.44.127
33	10.2.44.128/30	10.2.44.129 – 10.2.44.130	10.2.44.131
34	10.2.44.132/30	10.2.44.133 – 10.2.44.134	10.2.44.135
35	10.2.44.136/30	10.2.44.137 – 10.2.44.138	10.2.44.139
36	10.2.44.140/30	10.2.44.141 – 10.2.44.142	10.2.44.143
37	10.2.44.144/30	10.2.44.145 – 10.2.44.146	10.2.44.147
38	10.2.44.148/30	10.2.44.149 – 10.2.44.150	10.2.44.151
39	10.2.44.152/30	10.2.44.153 – 10.2.44.154	10.2.44.155
40	10.2.44.156/30	10.2.44.157 – 10.2.44.158	10.2.44.159
41	10.2.44.160/30	10.2.44.161 – 10.2.44.162	10.2.44.163
42	10.2.44.164/30	10.2.44.165 – 10.2.44.166	10.2.44.167
43	10.2.44.168/30	10.2.44.169 – 10.2.44.170	10.2.44.171
44	10.2.44.172/30	10.2.44.173 – 10.2.44.174	10.2.44.175
45	10.2.44.176/30	10.2.44.177 – 10.2.44.178	10.2.44.179
46	10.2.44.180/30	10.2.44.181 – 10.2.44.182	10.2.44.183
47	10.2.44.184/30	10.2.44.185 – 10.2.44.186	10.2.44.187
48	10.2.44.188/30	10.2.44.189 – 10.2.44.190	10.2.44.191
49	10.2.44.192/30	10.2.44.193 – 10.2.44.194	10.2.44.195
50	10.2.44.196/30	10.2.44.197 – 10.2.44.198	10.2.44.199
51	10.2.44.200/30	10.2.44.201 – 10.2.44.202	10.2.44.203
52	10.2.44.204/30	10.2.44.205 – 10.2.44.206	10.2.44.207
53	10.2.44.208/30	10.2.44.209 – 10.2.44.210	10.2.44.211
54	10.2.44.212/30	10.2.44.213 – 10.2.44.214	10.2.44.215
55	10.2.44.216/30	10.2.44.217 – 10.2.44.218	10.2.44.219
56	10.2.44.220/30	10.2.44.221 – 10.2.44.222	10.2.44.223
57	10.2.44.224/30	10.2.44.225 – 10.2.44.226	10.2.44.227
58	10.2.44.228/30	10.2.44.229 – 10.2.44.230	10.2.44.231
59	10.2.44.232/30	10.2.44.233 – 10.2.44.234	10.2.44.235
60	10.2.44.236/30	10.2.44.237 – 10.2.44.238	10.2.44.239
61	10.2.44.240/30	10.2.44.241 – 10.2.44.242	10.2.44.243
62	10.2.44.244/30	10.2.44.245 – 10.2.44.246	10.2.44.247
63	10.2.44.248/30	10.2.44.249 – 10.2.44.250	10.2.44.251
64	10.2.44.252/30	10.2.44.253 – 10.2.44.254	10.2.44.255
65	10.2.45.0/30	10.2.45.1 – 10.2.45.2	10.2.45.3
66	10.2.45.4/30	10.2.45.5 – 10.2.45.6	10.2.45.7
67	10.2.45.8/30	10.2.45.9 – 10.2.45.10	10.2.45.11
68	10.2.45.12/30	10.2.45.13 – 10.2.45.14	10.2.45.15
69	10.2.45.16/30	10.2.45.17 – 10.2.45.18	10.2.45.19
70	10.2.45.20/30	10.2.45.21 – 10.2.45.22	10.2.45.23
71	10.2.45.24/30	10.2.45.25 – 10.2.45.26	10.2.45.27
72	10.2.45.28/30	10.2.45.29 – 10.2.45.30	10.2.45.31
73	10.2.45.32/30	10.2.45.33 – 10.2.45.34	10.2.45.35
74	10.2.45.36/30	10.2.45.37 – 10.2.45.38	10.2.45.39
75	10.2.45.40/30	10.2.45.41 – 10.2.45.42	10.2.45.43
76	10.2.45.44/30	10.2.45.45 – 10.2.45.46	10.2.45.47
77	10.2.45.48/30	10.2.45.49 – 10.2.45.50	10.2.45.51
78	10.2.45.52/30	10.2.45.53 – 10.2.45.54	10.2.45.55
79	10.2.45.56/30	10.2.45.57 – 10.2.45.58	10.2.45.59
80	10.2.45.60/30	10.2.45.61 – 10.2.45.62	10.2.45.63
81	10.2.45.64/30	10.2.45.65 – 10.2.45.66	10.2.45.67
82	10.2.45.68/30	10.2.45.69 – 10.2.45.70	10.2.45.71
83	10.2.45.72/30	10.2.45.73 – 10.2.45.74	10.2.45.75
84	10.2.45.76/30	10.2.45.77 – 10.2.45.78	10.2.45.79
85	10.2.45.80/30	10.2.45.81 – 10.2.45.82	10.2.45.83
86	10.2.45.84/30	10.2.45.85 – 10.2.45.86	10.2.45.87
87	10.2.45.88/30	10.2.45.89 – 10.2.45.90	10.2.45.91
88	10.2.45.92/30	10.2.45.93 – 10.2.45.94	10.2.45.95
89	10.2.45.96/30	10.2.45.97 – 10.2.45.98	10.2.45.99
90	10.2.45.100/30	10.2.45.101 – 10.2.45.102	10.2.45.103
91	10.2.45.104/30	10.2.45.105 – 10.2.45.106	10.2.45.107
92	10.2.45.108/30	10.2.45.109 – 10.2.45.110	10.2.45.111
93	10.2.45.112/30	10.2.45.113 – 10.2.45.114	10.2.45.115
94	10.2.45.116/30	10.2.45.117 – 10.2.45.118	10.2.45.119
95	10.2.45.120/30	10.2.45.121 – 10.2.45.122	10.2.45.123
96	10.2.45.124/30	10.2.45.125 – 10.2.45.126	10.2.45.127
97	10.2.45.128/30	10.2.45.129 – 10.2.45.130	10.2.45.131
98	10.2.45.132/30	10.2.45.133 – 10.2.45.134	10.2.45.135
99	10.2.45.136/30	10.2.45.137 – 10.2.45.138	10.2.45.139
100	10.2.45.140/30	10.2.45.141 – 10.2.45.142	10.2.45.143
101	10.2.45.144/30	10.2.45.145 – 10.2.45.146	10.2.45.147
102	10.2.45.148/30	10.2.45.149 – 10.2.45.150	10.2.45.151
103	10.2.45.152/30	10.2.45.153 – 10.2.45.154	10.2.45.155
104	10.2.45.156/30	10.2.45.157 – 10.2.45.158	10.2.45.159
105	10.2.45.160/30	10.2.45.161 – 10.2.45.162	10.2.45.163
106	10.2.45.164/30	10.2.45.165 – 10.2.45.166	10.2.45.167
107	10.2.45.168/30	10.2.45.169 – 10.2.45.170	10.2.45.171
108	10.2.45.172/30	10.2.45.173 – 10.2.45.174	10.2.45.175
109	10.2.45.176/30	10.2.45.177 – 10.2.45.178	10.2.45.179
110	10.2.45.180/30	10.2.45.181 – 10.2.45.182	10.2.45.183
111	10.2.45.184/30	10.2.45.185 – 10.2.45.186	10.2.45.187
112	10.2.45.188/30	10.2.45.189 – 10.2.45.190	10.2.45.191
113	10.2.45.192/30	10.2.45.193 – 10.2.45.194	10.2.45.195
114	10.2.45.196/30	10.2.45.197 – 10.2.45.198	10.2.45.199
115	10.2.45.200/30	10.2.45.201 – 10.2.45.202	10.2.45.203
116	10.2.45.204/30	10.2.45.205 – 10.2.45.206	10.2.45.207
117	10.2.45.208/30	10.2.45.209 – 10.2.45.210	10.2.45.211
118	10.2.45.212/30	10.2.45.213 – 10.2.45.214	10.2.45.215
119	10.2.45.216/30	10.2.45.217 – 10.2.45.218	10.2.45.219
120	10.2.45.220/30	10.2.45.221 – 10.2.45.222	10.2.45.223
121	10.2.45.224/30	10.2.45.225 – 10.2.45.226	10.2.45.227
122	10.2.45.228/30	10.2.45.229 – 10.2.45.230	10.2.45.231
123	10.2.45.232/30	10.2.45.233 – 10.2.45.234	10.2.45.235
124	10.2.45.236/30	10.2.45.237 – 10.2.45.238	10.2.45.239
125	10.2.45.240/30	10.2.45.241 – 10.2.45.242	10.2.45.243
126	10.2.45.244/30	10.2.45.245 – 10.2.45.246	10.2.45.247
127	10.2.45.248/30	10.2.45.249 – 10.2.45.250	10.2.45.251
128	10.2.45.252/30	10.2.45.253 – 10.2.45.254	10.2.45.255

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 →