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)10.78.220.0/23

network10.78.220.0/23

broadcast10.78.221.255

first host10.78.220.1

last host10.78.221.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.220.0/23

address00001010.01001110.11011100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.11011100.00000000

broadcast00001010.01001110.11011101.11111111

green = network part, grey = host part

hex0x0a4edc00

decimal172940288

reverse dns0.220.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:dc00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.78.220.0/32	10.78.220.0 – 10.78.220.0	10.78.220.0
2	10.78.220.1/32	10.78.220.1 – 10.78.220.1	10.78.220.1
3	10.78.220.2/32	10.78.220.2 – 10.78.220.2	10.78.220.2
4	10.78.220.3/32	10.78.220.3 – 10.78.220.3	10.78.220.3
5	10.78.220.4/32	10.78.220.4 – 10.78.220.4	10.78.220.4
6	10.78.220.5/32	10.78.220.5 – 10.78.220.5	10.78.220.5
7	10.78.220.6/32	10.78.220.6 – 10.78.220.6	10.78.220.6
8	10.78.220.7/32	10.78.220.7 – 10.78.220.7	10.78.220.7
9	10.78.220.8/32	10.78.220.8 – 10.78.220.8	10.78.220.8
10	10.78.220.9/32	10.78.220.9 – 10.78.220.9	10.78.220.9
11	10.78.220.10/32	10.78.220.10 – 10.78.220.10	10.78.220.10
12	10.78.220.11/32	10.78.220.11 – 10.78.220.11	10.78.220.11
13	10.78.220.12/32	10.78.220.12 – 10.78.220.12	10.78.220.12
14	10.78.220.13/32	10.78.220.13 – 10.78.220.13	10.78.220.13
15	10.78.220.14/32	10.78.220.14 – 10.78.220.14	10.78.220.14
16	10.78.220.15/32	10.78.220.15 – 10.78.220.15	10.78.220.15
17	10.78.220.16/32	10.78.220.16 – 10.78.220.16	10.78.220.16
18	10.78.220.17/32	10.78.220.17 – 10.78.220.17	10.78.220.17
19	10.78.220.18/32	10.78.220.18 – 10.78.220.18	10.78.220.18
20	10.78.220.19/32	10.78.220.19 – 10.78.220.19	10.78.220.19
21	10.78.220.20/32	10.78.220.20 – 10.78.220.20	10.78.220.20
22	10.78.220.21/32	10.78.220.21 – 10.78.220.21	10.78.220.21
23	10.78.220.22/32	10.78.220.22 – 10.78.220.22	10.78.220.22
24	10.78.220.23/32	10.78.220.23 – 10.78.220.23	10.78.220.23
25	10.78.220.24/32	10.78.220.24 – 10.78.220.24	10.78.220.24
26	10.78.220.25/32	10.78.220.25 – 10.78.220.25	10.78.220.25
27	10.78.220.26/32	10.78.220.26 – 10.78.220.26	10.78.220.26
28	10.78.220.27/32	10.78.220.27 – 10.78.220.27	10.78.220.27
29	10.78.220.28/32	10.78.220.28 – 10.78.220.28	10.78.220.28
30	10.78.220.29/32	10.78.220.29 – 10.78.220.29	10.78.220.29
31	10.78.220.30/32	10.78.220.30 – 10.78.220.30	10.78.220.30
32	10.78.220.31/32	10.78.220.31 – 10.78.220.31	10.78.220.31
33	10.78.220.32/32	10.78.220.32 – 10.78.220.32	10.78.220.32
34	10.78.220.33/32	10.78.220.33 – 10.78.220.33	10.78.220.33
35	10.78.220.34/32	10.78.220.34 – 10.78.220.34	10.78.220.34
36	10.78.220.35/32	10.78.220.35 – 10.78.220.35	10.78.220.35
37	10.78.220.36/32	10.78.220.36 – 10.78.220.36	10.78.220.36
38	10.78.220.37/32	10.78.220.37 – 10.78.220.37	10.78.220.37
39	10.78.220.38/32	10.78.220.38 – 10.78.220.38	10.78.220.38
40	10.78.220.39/32	10.78.220.39 – 10.78.220.39	10.78.220.39
41	10.78.220.40/32	10.78.220.40 – 10.78.220.40	10.78.220.40
42	10.78.220.41/32	10.78.220.41 – 10.78.220.41	10.78.220.41
43	10.78.220.42/32	10.78.220.42 – 10.78.220.42	10.78.220.42
44	10.78.220.43/32	10.78.220.43 – 10.78.220.43	10.78.220.43
45	10.78.220.44/32	10.78.220.44 – 10.78.220.44	10.78.220.44
46	10.78.220.45/32	10.78.220.45 – 10.78.220.45	10.78.220.45
47	10.78.220.46/32	10.78.220.46 – 10.78.220.46	10.78.220.46
48	10.78.220.47/32	10.78.220.47 – 10.78.220.47	10.78.220.47
49	10.78.220.48/32	10.78.220.48 – 10.78.220.48	10.78.220.48
50	10.78.220.49/32	10.78.220.49 – 10.78.220.49	10.78.220.49
51	10.78.220.50/32	10.78.220.50 – 10.78.220.50	10.78.220.50
52	10.78.220.51/32	10.78.220.51 – 10.78.220.51	10.78.220.51
53	10.78.220.52/32	10.78.220.52 – 10.78.220.52	10.78.220.52
54	10.78.220.53/32	10.78.220.53 – 10.78.220.53	10.78.220.53
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60	10.78.220.59/32	10.78.220.59 – 10.78.220.59	10.78.220.59
61	10.78.220.60/32	10.78.220.60 – 10.78.220.60	10.78.220.60
62	10.78.220.61/32	10.78.220.61 – 10.78.220.61	10.78.220.61
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66	10.78.220.65/32	10.78.220.65 – 10.78.220.65	10.78.220.65
67	10.78.220.66/32	10.78.220.66 – 10.78.220.66	10.78.220.66
68	10.78.220.67/32	10.78.220.67 – 10.78.220.67	10.78.220.67
69	10.78.220.68/32	10.78.220.68 – 10.78.220.68	10.78.220.68
70	10.78.220.69/32	10.78.220.69 – 10.78.220.69	10.78.220.69
71	10.78.220.70/32	10.78.220.70 – 10.78.220.70	10.78.220.70
72	10.78.220.71/32	10.78.220.71 – 10.78.220.71	10.78.220.71
73	10.78.220.72/32	10.78.220.72 – 10.78.220.72	10.78.220.72
74	10.78.220.73/32	10.78.220.73 – 10.78.220.73	10.78.220.73
75	10.78.220.74/32	10.78.220.74 – 10.78.220.74	10.78.220.74
76	10.78.220.75/32	10.78.220.75 – 10.78.220.75	10.78.220.75
77	10.78.220.76/32	10.78.220.76 – 10.78.220.76	10.78.220.76
78	10.78.220.77/32	10.78.220.77 – 10.78.220.77	10.78.220.77
79	10.78.220.78/32	10.78.220.78 – 10.78.220.78	10.78.220.78
80	10.78.220.79/32	10.78.220.79 – 10.78.220.79	10.78.220.79
81	10.78.220.80/32	10.78.220.80 – 10.78.220.80	10.78.220.80
82	10.78.220.81/32	10.78.220.81 – 10.78.220.81	10.78.220.81
83	10.78.220.82/32	10.78.220.82 – 10.78.220.82	10.78.220.82
84	10.78.220.83/32	10.78.220.83 – 10.78.220.83	10.78.220.83
85	10.78.220.84/32	10.78.220.84 – 10.78.220.84	10.78.220.84
86	10.78.220.85/32	10.78.220.85 – 10.78.220.85	10.78.220.85
87	10.78.220.86/32	10.78.220.86 – 10.78.220.86	10.78.220.86
88	10.78.220.87/32	10.78.220.87 – 10.78.220.87	10.78.220.87
89	10.78.220.88/32	10.78.220.88 – 10.78.220.88	10.78.220.88
90	10.78.220.89/32	10.78.220.89 – 10.78.220.89	10.78.220.89
91	10.78.220.90/32	10.78.220.90 – 10.78.220.90	10.78.220.90
92	10.78.220.91/32	10.78.220.91 – 10.78.220.91	10.78.220.91
93	10.78.220.92/32	10.78.220.92 – 10.78.220.92	10.78.220.92
94	10.78.220.93/32	10.78.220.93 – 10.78.220.93	10.78.220.93
95	10.78.220.94/32	10.78.220.94 – 10.78.220.94	10.78.220.94
96	10.78.220.95/32	10.78.220.95 – 10.78.220.95	10.78.220.95
97	10.78.220.96/32	10.78.220.96 – 10.78.220.96	10.78.220.96
98	10.78.220.97/32	10.78.220.97 – 10.78.220.97	10.78.220.97
99	10.78.220.98/32	10.78.220.98 – 10.78.220.98	10.78.220.98
100	10.78.220.99/32	10.78.220.99 – 10.78.220.99	10.78.220.99
101	10.78.220.100/32	10.78.220.100 – 10.78.220.100	10.78.220.100
102	10.78.220.101/32	10.78.220.101 – 10.78.220.101	10.78.220.101
103	10.78.220.102/32	10.78.220.102 – 10.78.220.102	10.78.220.102
104	10.78.220.103/32	10.78.220.103 – 10.78.220.103	10.78.220.103
105	10.78.220.104/32	10.78.220.104 – 10.78.220.104	10.78.220.104
106	10.78.220.105/32	10.78.220.105 – 10.78.220.105	10.78.220.105
107	10.78.220.106/32	10.78.220.106 – 10.78.220.106	10.78.220.106
108	10.78.220.107/32	10.78.220.107 – 10.78.220.107	10.78.220.107
109	10.78.220.108/32	10.78.220.108 – 10.78.220.108	10.78.220.108
110	10.78.220.109/32	10.78.220.109 – 10.78.220.109	10.78.220.109
111	10.78.220.110/32	10.78.220.110 – 10.78.220.110	10.78.220.110
112	10.78.220.111/32	10.78.220.111 – 10.78.220.111	10.78.220.111
113	10.78.220.112/32	10.78.220.112 – 10.78.220.112	10.78.220.112
114	10.78.220.113/32	10.78.220.113 – 10.78.220.113	10.78.220.113
115	10.78.220.114/32	10.78.220.114 – 10.78.220.114	10.78.220.114
116	10.78.220.115/32	10.78.220.115 – 10.78.220.115	10.78.220.115
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118	10.78.220.117/32	10.78.220.117 – 10.78.220.117	10.78.220.117
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123	10.78.220.122/32	10.78.220.122 – 10.78.220.122	10.78.220.122
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126	10.78.220.125/32	10.78.220.125 – 10.78.220.125	10.78.220.125
127	10.78.220.126/32	10.78.220.126 – 10.78.220.126	10.78.220.126
128	10.78.220.127/32	10.78.220.127 – 10.78.220.127	10.78.220.127
129	10.78.220.128/32	10.78.220.128 – 10.78.220.128	10.78.220.128
130	10.78.220.129/32	10.78.220.129 – 10.78.220.129	10.78.220.129
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132	10.78.220.131/32	10.78.220.131 – 10.78.220.131	10.78.220.131
133	10.78.220.132/32	10.78.220.132 – 10.78.220.132	10.78.220.132
134	10.78.220.133/32	10.78.220.133 – 10.78.220.133	10.78.220.133
135	10.78.220.134/32	10.78.220.134 – 10.78.220.134	10.78.220.134
136	10.78.220.135/32	10.78.220.135 – 10.78.220.135	10.78.220.135
137	10.78.220.136/32	10.78.220.136 – 10.78.220.136	10.78.220.136
138	10.78.220.137/32	10.78.220.137 – 10.78.220.137	10.78.220.137
139	10.78.220.138/32	10.78.220.138 – 10.78.220.138	10.78.220.138
140	10.78.220.139/32	10.78.220.139 – 10.78.220.139	10.78.220.139
141	10.78.220.140/32	10.78.220.140 – 10.78.220.140	10.78.220.140
142	10.78.220.141/32	10.78.220.141 – 10.78.220.141	10.78.220.141
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210	10.78.220.209/32	10.78.220.209 – 10.78.220.209	10.78.220.209
211	10.78.220.210/32	10.78.220.210 – 10.78.220.210	10.78.220.210
212	10.78.220.211/32	10.78.220.211 – 10.78.220.211	10.78.220.211
213	10.78.220.212/32	10.78.220.212 – 10.78.220.212	10.78.220.212
214	10.78.220.213/32	10.78.220.213 – 10.78.220.213	10.78.220.213
215	10.78.220.214/32	10.78.220.214 – 10.78.220.214	10.78.220.214
216	10.78.220.215/32	10.78.220.215 – 10.78.220.215	10.78.220.215
217	10.78.220.216/32	10.78.220.216 – 10.78.220.216	10.78.220.216
218	10.78.220.217/32	10.78.220.217 – 10.78.220.217	10.78.220.217
219	10.78.220.218/32	10.78.220.218 – 10.78.220.218	10.78.220.218
220	10.78.220.219/32	10.78.220.219 – 10.78.220.219	10.78.220.219
221	10.78.220.220/32	10.78.220.220 – 10.78.220.220	10.78.220.220
222	10.78.220.221/32	10.78.220.221 – 10.78.220.221	10.78.220.221
223	10.78.220.222/32	10.78.220.222 – 10.78.220.222	10.78.220.222
224	10.78.220.223/32	10.78.220.223 – 10.78.220.223	10.78.220.223
225	10.78.220.224/32	10.78.220.224 – 10.78.220.224	10.78.220.224
226	10.78.220.225/32	10.78.220.225 – 10.78.220.225	10.78.220.225
227	10.78.220.226/32	10.78.220.226 – 10.78.220.226	10.78.220.226
228	10.78.220.227/32	10.78.220.227 – 10.78.220.227	10.78.220.227
229	10.78.220.228/32	10.78.220.228 – 10.78.220.228	10.78.220.228
230	10.78.220.229/32	10.78.220.229 – 10.78.220.229	10.78.220.229
231	10.78.220.230/32	10.78.220.230 – 10.78.220.230	10.78.220.230
232	10.78.220.231/32	10.78.220.231 – 10.78.220.231	10.78.220.231
233	10.78.220.232/32	10.78.220.232 – 10.78.220.232	10.78.220.232
234	10.78.220.233/32	10.78.220.233 – 10.78.220.233	10.78.220.233
235	10.78.220.234/32	10.78.220.234 – 10.78.220.234	10.78.220.234
236	10.78.220.235/32	10.78.220.235 – 10.78.220.235	10.78.220.235
237	10.78.220.236/32	10.78.220.236 – 10.78.220.236	10.78.220.236
238	10.78.220.237/32	10.78.220.237 – 10.78.220.237	10.78.220.237
239	10.78.220.238/32	10.78.220.238 – 10.78.220.238	10.78.220.238
240	10.78.220.239/32	10.78.220.239 – 10.78.220.239	10.78.220.239
241	10.78.220.240/32	10.78.220.240 – 10.78.220.240	10.78.220.240
242	10.78.220.241/32	10.78.220.241 – 10.78.220.241	10.78.220.241
243	10.78.220.242/32	10.78.220.242 – 10.78.220.242	10.78.220.242
244	10.78.220.243/32	10.78.220.243 – 10.78.220.243	10.78.220.243
245	10.78.220.244/32	10.78.220.244 – 10.78.220.244	10.78.220.244
246	10.78.220.245/32	10.78.220.245 – 10.78.220.245	10.78.220.245
247	10.78.220.246/32	10.78.220.246 – 10.78.220.246	10.78.220.246
248	10.78.220.247/32	10.78.220.247 – 10.78.220.247	10.78.220.247
249	10.78.220.248/32	10.78.220.248 – 10.78.220.248	10.78.220.248
250	10.78.220.249/32	10.78.220.249 – 10.78.220.249	10.78.220.249
251	10.78.220.250/32	10.78.220.250 – 10.78.220.250	10.78.220.250
252	10.78.220.251/32	10.78.220.251 – 10.78.220.251	10.78.220.251
253	10.78.220.252/32	10.78.220.252 – 10.78.220.252	10.78.220.252
254	10.78.220.253/32	10.78.220.253 – 10.78.220.253	10.78.220.253
255	10.78.220.254/32	10.78.220.254 – 10.78.220.254	10.78.220.254
256	10.78.220.255/32	10.78.220.255 – 10.78.220.255	10.78.220.255

showing 256 of 512

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 →