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)10.0.142.0/24

network10.0.142.0/24

broadcast10.0.142.255

first host10.0.142.1

last host10.0.142.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.142.0/24

address00001010.00000000.10001110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.10001110.00000000

broadcast00001010.00000000.10001110.11111111

green = network part, grey = host part

hex0x0a008e00

decimal167808512

reverse dns0.142.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:8e00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.142.0/32	10.0.142.0 – 10.0.142.0	10.0.142.0
2	10.0.142.1/32	10.0.142.1 – 10.0.142.1	10.0.142.1
3	10.0.142.2/32	10.0.142.2 – 10.0.142.2	10.0.142.2
4	10.0.142.3/32	10.0.142.3 – 10.0.142.3	10.0.142.3
5	10.0.142.4/32	10.0.142.4 – 10.0.142.4	10.0.142.4
6	10.0.142.5/32	10.0.142.5 – 10.0.142.5	10.0.142.5
7	10.0.142.6/32	10.0.142.6 – 10.0.142.6	10.0.142.6
8	10.0.142.7/32	10.0.142.7 – 10.0.142.7	10.0.142.7
9	10.0.142.8/32	10.0.142.8 – 10.0.142.8	10.0.142.8
10	10.0.142.9/32	10.0.142.9 – 10.0.142.9	10.0.142.9
11	10.0.142.10/32	10.0.142.10 – 10.0.142.10	10.0.142.10
12	10.0.142.11/32	10.0.142.11 – 10.0.142.11	10.0.142.11
13	10.0.142.12/32	10.0.142.12 – 10.0.142.12	10.0.142.12
14	10.0.142.13/32	10.0.142.13 – 10.0.142.13	10.0.142.13
15	10.0.142.14/32	10.0.142.14 – 10.0.142.14	10.0.142.14
16	10.0.142.15/32	10.0.142.15 – 10.0.142.15	10.0.142.15
17	10.0.142.16/32	10.0.142.16 – 10.0.142.16	10.0.142.16
18	10.0.142.17/32	10.0.142.17 – 10.0.142.17	10.0.142.17
19	10.0.142.18/32	10.0.142.18 – 10.0.142.18	10.0.142.18
20	10.0.142.19/32	10.0.142.19 – 10.0.142.19	10.0.142.19
21	10.0.142.20/32	10.0.142.20 – 10.0.142.20	10.0.142.20
22	10.0.142.21/32	10.0.142.21 – 10.0.142.21	10.0.142.21
23	10.0.142.22/32	10.0.142.22 – 10.0.142.22	10.0.142.22
24	10.0.142.23/32	10.0.142.23 – 10.0.142.23	10.0.142.23
25	10.0.142.24/32	10.0.142.24 – 10.0.142.24	10.0.142.24
26	10.0.142.25/32	10.0.142.25 – 10.0.142.25	10.0.142.25
27	10.0.142.26/32	10.0.142.26 – 10.0.142.26	10.0.142.26
28	10.0.142.27/32	10.0.142.27 – 10.0.142.27	10.0.142.27
29	10.0.142.28/32	10.0.142.28 – 10.0.142.28	10.0.142.28
30	10.0.142.29/32	10.0.142.29 – 10.0.142.29	10.0.142.29
31	10.0.142.30/32	10.0.142.30 – 10.0.142.30	10.0.142.30
32	10.0.142.31/32	10.0.142.31 – 10.0.142.31	10.0.142.31
33	10.0.142.32/32	10.0.142.32 – 10.0.142.32	10.0.142.32
34	10.0.142.33/32	10.0.142.33 – 10.0.142.33	10.0.142.33
35	10.0.142.34/32	10.0.142.34 – 10.0.142.34	10.0.142.34
36	10.0.142.35/32	10.0.142.35 – 10.0.142.35	10.0.142.35
37	10.0.142.36/32	10.0.142.36 – 10.0.142.36	10.0.142.36
38	10.0.142.37/32	10.0.142.37 – 10.0.142.37	10.0.142.37
39	10.0.142.38/32	10.0.142.38 – 10.0.142.38	10.0.142.38
40	10.0.142.39/32	10.0.142.39 – 10.0.142.39	10.0.142.39
41	10.0.142.40/32	10.0.142.40 – 10.0.142.40	10.0.142.40
42	10.0.142.41/32	10.0.142.41 – 10.0.142.41	10.0.142.41
43	10.0.142.42/32	10.0.142.42 – 10.0.142.42	10.0.142.42
44	10.0.142.43/32	10.0.142.43 – 10.0.142.43	10.0.142.43
45	10.0.142.44/32	10.0.142.44 – 10.0.142.44	10.0.142.44
46	10.0.142.45/32	10.0.142.45 – 10.0.142.45	10.0.142.45
47	10.0.142.46/32	10.0.142.46 – 10.0.142.46	10.0.142.46
48	10.0.142.47/32	10.0.142.47 – 10.0.142.47	10.0.142.47
49	10.0.142.48/32	10.0.142.48 – 10.0.142.48	10.0.142.48
50	10.0.142.49/32	10.0.142.49 – 10.0.142.49	10.0.142.49
51	10.0.142.50/32	10.0.142.50 – 10.0.142.50	10.0.142.50
52	10.0.142.51/32	10.0.142.51 – 10.0.142.51	10.0.142.51
53	10.0.142.52/32	10.0.142.52 – 10.0.142.52	10.0.142.52
54	10.0.142.53/32	10.0.142.53 – 10.0.142.53	10.0.142.53
55	10.0.142.54/32	10.0.142.54 – 10.0.142.54	10.0.142.54
56	10.0.142.55/32	10.0.142.55 – 10.0.142.55	10.0.142.55
57	10.0.142.56/32	10.0.142.56 – 10.0.142.56	10.0.142.56
58	10.0.142.57/32	10.0.142.57 – 10.0.142.57	10.0.142.57
59	10.0.142.58/32	10.0.142.58 – 10.0.142.58	10.0.142.58
60	10.0.142.59/32	10.0.142.59 – 10.0.142.59	10.0.142.59
61	10.0.142.60/32	10.0.142.60 – 10.0.142.60	10.0.142.60
62	10.0.142.61/32	10.0.142.61 – 10.0.142.61	10.0.142.61
63	10.0.142.62/32	10.0.142.62 – 10.0.142.62	10.0.142.62
64	10.0.142.63/32	10.0.142.63 – 10.0.142.63	10.0.142.63
65	10.0.142.64/32	10.0.142.64 – 10.0.142.64	10.0.142.64
66	10.0.142.65/32	10.0.142.65 – 10.0.142.65	10.0.142.65
67	10.0.142.66/32	10.0.142.66 – 10.0.142.66	10.0.142.66
68	10.0.142.67/32	10.0.142.67 – 10.0.142.67	10.0.142.67
69	10.0.142.68/32	10.0.142.68 – 10.0.142.68	10.0.142.68
70	10.0.142.69/32	10.0.142.69 – 10.0.142.69	10.0.142.69
71	10.0.142.70/32	10.0.142.70 – 10.0.142.70	10.0.142.70
72	10.0.142.71/32	10.0.142.71 – 10.0.142.71	10.0.142.71
73	10.0.142.72/32	10.0.142.72 – 10.0.142.72	10.0.142.72
74	10.0.142.73/32	10.0.142.73 – 10.0.142.73	10.0.142.73
75	10.0.142.74/32	10.0.142.74 – 10.0.142.74	10.0.142.74
76	10.0.142.75/32	10.0.142.75 – 10.0.142.75	10.0.142.75
77	10.0.142.76/32	10.0.142.76 – 10.0.142.76	10.0.142.76
78	10.0.142.77/32	10.0.142.77 – 10.0.142.77	10.0.142.77
79	10.0.142.78/32	10.0.142.78 – 10.0.142.78	10.0.142.78
80	10.0.142.79/32	10.0.142.79 – 10.0.142.79	10.0.142.79
81	10.0.142.80/32	10.0.142.80 – 10.0.142.80	10.0.142.80
82	10.0.142.81/32	10.0.142.81 – 10.0.142.81	10.0.142.81
83	10.0.142.82/32	10.0.142.82 – 10.0.142.82	10.0.142.82
84	10.0.142.83/32	10.0.142.83 – 10.0.142.83	10.0.142.83
85	10.0.142.84/32	10.0.142.84 – 10.0.142.84	10.0.142.84
86	10.0.142.85/32	10.0.142.85 – 10.0.142.85	10.0.142.85
87	10.0.142.86/32	10.0.142.86 – 10.0.142.86	10.0.142.86
88	10.0.142.87/32	10.0.142.87 – 10.0.142.87	10.0.142.87
89	10.0.142.88/32	10.0.142.88 – 10.0.142.88	10.0.142.88
90	10.0.142.89/32	10.0.142.89 – 10.0.142.89	10.0.142.89
91	10.0.142.90/32	10.0.142.90 – 10.0.142.90	10.0.142.90
92	10.0.142.91/32	10.0.142.91 – 10.0.142.91	10.0.142.91
93	10.0.142.92/32	10.0.142.92 – 10.0.142.92	10.0.142.92
94	10.0.142.93/32	10.0.142.93 – 10.0.142.93	10.0.142.93
95	10.0.142.94/32	10.0.142.94 – 10.0.142.94	10.0.142.94
96	10.0.142.95/32	10.0.142.95 – 10.0.142.95	10.0.142.95
97	10.0.142.96/32	10.0.142.96 – 10.0.142.96	10.0.142.96
98	10.0.142.97/32	10.0.142.97 – 10.0.142.97	10.0.142.97
99	10.0.142.98/32	10.0.142.98 – 10.0.142.98	10.0.142.98
100	10.0.142.99/32	10.0.142.99 – 10.0.142.99	10.0.142.99
101	10.0.142.100/32	10.0.142.100 – 10.0.142.100	10.0.142.100
102	10.0.142.101/32	10.0.142.101 – 10.0.142.101	10.0.142.101
103	10.0.142.102/32	10.0.142.102 – 10.0.142.102	10.0.142.102
104	10.0.142.103/32	10.0.142.103 – 10.0.142.103	10.0.142.103
105	10.0.142.104/32	10.0.142.104 – 10.0.142.104	10.0.142.104
106	10.0.142.105/32	10.0.142.105 – 10.0.142.105	10.0.142.105
107	10.0.142.106/32	10.0.142.106 – 10.0.142.106	10.0.142.106
108	10.0.142.107/32	10.0.142.107 – 10.0.142.107	10.0.142.107
109	10.0.142.108/32	10.0.142.108 – 10.0.142.108	10.0.142.108
110	10.0.142.109/32	10.0.142.109 – 10.0.142.109	10.0.142.109
111	10.0.142.110/32	10.0.142.110 – 10.0.142.110	10.0.142.110
112	10.0.142.111/32	10.0.142.111 – 10.0.142.111	10.0.142.111
113	10.0.142.112/32	10.0.142.112 – 10.0.142.112	10.0.142.112
114	10.0.142.113/32	10.0.142.113 – 10.0.142.113	10.0.142.113
115	10.0.142.114/32	10.0.142.114 – 10.0.142.114	10.0.142.114
116	10.0.142.115/32	10.0.142.115 – 10.0.142.115	10.0.142.115
117	10.0.142.116/32	10.0.142.116 – 10.0.142.116	10.0.142.116
118	10.0.142.117/32	10.0.142.117 – 10.0.142.117	10.0.142.117
119	10.0.142.118/32	10.0.142.118 – 10.0.142.118	10.0.142.118
120	10.0.142.119/32	10.0.142.119 – 10.0.142.119	10.0.142.119
121	10.0.142.120/32	10.0.142.120 – 10.0.142.120	10.0.142.120
122	10.0.142.121/32	10.0.142.121 – 10.0.142.121	10.0.142.121
123	10.0.142.122/32	10.0.142.122 – 10.0.142.122	10.0.142.122
124	10.0.142.123/32	10.0.142.123 – 10.0.142.123	10.0.142.123
125	10.0.142.124/32	10.0.142.124 – 10.0.142.124	10.0.142.124
126	10.0.142.125/32	10.0.142.125 – 10.0.142.125	10.0.142.125
127	10.0.142.126/32	10.0.142.126 – 10.0.142.126	10.0.142.126
128	10.0.142.127/32	10.0.142.127 – 10.0.142.127	10.0.142.127
129	10.0.142.128/32	10.0.142.128 – 10.0.142.128	10.0.142.128
130	10.0.142.129/32	10.0.142.129 – 10.0.142.129	10.0.142.129
131	10.0.142.130/32	10.0.142.130 – 10.0.142.130	10.0.142.130
132	10.0.142.131/32	10.0.142.131 – 10.0.142.131	10.0.142.131
133	10.0.142.132/32	10.0.142.132 – 10.0.142.132	10.0.142.132
134	10.0.142.133/32	10.0.142.133 – 10.0.142.133	10.0.142.133
135	10.0.142.134/32	10.0.142.134 – 10.0.142.134	10.0.142.134
136	10.0.142.135/32	10.0.142.135 – 10.0.142.135	10.0.142.135
137	10.0.142.136/32	10.0.142.136 – 10.0.142.136	10.0.142.136
138	10.0.142.137/32	10.0.142.137 – 10.0.142.137	10.0.142.137
139	10.0.142.138/32	10.0.142.138 – 10.0.142.138	10.0.142.138
140	10.0.142.139/32	10.0.142.139 – 10.0.142.139	10.0.142.139
141	10.0.142.140/32	10.0.142.140 – 10.0.142.140	10.0.142.140
142	10.0.142.141/32	10.0.142.141 – 10.0.142.141	10.0.142.141
143	10.0.142.142/32	10.0.142.142 – 10.0.142.142	10.0.142.142
144	10.0.142.143/32	10.0.142.143 – 10.0.142.143	10.0.142.143
145	10.0.142.144/32	10.0.142.144 – 10.0.142.144	10.0.142.144
146	10.0.142.145/32	10.0.142.145 – 10.0.142.145	10.0.142.145
147	10.0.142.146/32	10.0.142.146 – 10.0.142.146	10.0.142.146
148	10.0.142.147/32	10.0.142.147 – 10.0.142.147	10.0.142.147
149	10.0.142.148/32	10.0.142.148 – 10.0.142.148	10.0.142.148
150	10.0.142.149/32	10.0.142.149 – 10.0.142.149	10.0.142.149
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152	10.0.142.151/32	10.0.142.151 – 10.0.142.151	10.0.142.151
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157	10.0.142.156/32	10.0.142.156 – 10.0.142.156	10.0.142.156
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210	10.0.142.209/32	10.0.142.209 – 10.0.142.209	10.0.142.209
211	10.0.142.210/32	10.0.142.210 – 10.0.142.210	10.0.142.210
212	10.0.142.211/32	10.0.142.211 – 10.0.142.211	10.0.142.211
213	10.0.142.212/32	10.0.142.212 – 10.0.142.212	10.0.142.212
214	10.0.142.213/32	10.0.142.213 – 10.0.142.213	10.0.142.213
215	10.0.142.214/32	10.0.142.214 – 10.0.142.214	10.0.142.214
216	10.0.142.215/32	10.0.142.215 – 10.0.142.215	10.0.142.215
217	10.0.142.216/32	10.0.142.216 – 10.0.142.216	10.0.142.216
218	10.0.142.217/32	10.0.142.217 – 10.0.142.217	10.0.142.217
219	10.0.142.218/32	10.0.142.218 – 10.0.142.218	10.0.142.218
220	10.0.142.219/32	10.0.142.219 – 10.0.142.219	10.0.142.219
221	10.0.142.220/32	10.0.142.220 – 10.0.142.220	10.0.142.220
222	10.0.142.221/32	10.0.142.221 – 10.0.142.221	10.0.142.221
223	10.0.142.222/32	10.0.142.222 – 10.0.142.222	10.0.142.222
224	10.0.142.223/32	10.0.142.223 – 10.0.142.223	10.0.142.223
225	10.0.142.224/32	10.0.142.224 – 10.0.142.224	10.0.142.224
226	10.0.142.225/32	10.0.142.225 – 10.0.142.225	10.0.142.225
227	10.0.142.226/32	10.0.142.226 – 10.0.142.226	10.0.142.226
228	10.0.142.227/32	10.0.142.227 – 10.0.142.227	10.0.142.227
229	10.0.142.228/32	10.0.142.228 – 10.0.142.228	10.0.142.228
230	10.0.142.229/32	10.0.142.229 – 10.0.142.229	10.0.142.229
231	10.0.142.230/32	10.0.142.230 – 10.0.142.230	10.0.142.230
232	10.0.142.231/32	10.0.142.231 – 10.0.142.231	10.0.142.231
233	10.0.142.232/32	10.0.142.232 – 10.0.142.232	10.0.142.232
234	10.0.142.233/32	10.0.142.233 – 10.0.142.233	10.0.142.233
235	10.0.142.234/32	10.0.142.234 – 10.0.142.234	10.0.142.234
236	10.0.142.235/32	10.0.142.235 – 10.0.142.235	10.0.142.235
237	10.0.142.236/32	10.0.142.236 – 10.0.142.236	10.0.142.236
238	10.0.142.237/32	10.0.142.237 – 10.0.142.237	10.0.142.237
239	10.0.142.238/32	10.0.142.238 – 10.0.142.238	10.0.142.238
240	10.0.142.239/32	10.0.142.239 – 10.0.142.239	10.0.142.239
241	10.0.142.240/32	10.0.142.240 – 10.0.142.240	10.0.142.240
242	10.0.142.241/32	10.0.142.241 – 10.0.142.241	10.0.142.241
243	10.0.142.242/32	10.0.142.242 – 10.0.142.242	10.0.142.242
244	10.0.142.243/32	10.0.142.243 – 10.0.142.243	10.0.142.243
245	10.0.142.244/32	10.0.142.244 – 10.0.142.244	10.0.142.244
246	10.0.142.245/32	10.0.142.245 – 10.0.142.245	10.0.142.245
247	10.0.142.246/32	10.0.142.246 – 10.0.142.246	10.0.142.246
248	10.0.142.247/32	10.0.142.247 – 10.0.142.247	10.0.142.247
249	10.0.142.248/32	10.0.142.248 – 10.0.142.248	10.0.142.248
250	10.0.142.249/32	10.0.142.249 – 10.0.142.249	10.0.142.249
251	10.0.142.250/32	10.0.142.250 – 10.0.142.250	10.0.142.250
252	10.0.142.251/32	10.0.142.251 – 10.0.142.251	10.0.142.251
253	10.0.142.252/32	10.0.142.252 – 10.0.142.252	10.0.142.252
254	10.0.142.253/32	10.0.142.253 – 10.0.142.253	10.0.142.253
255	10.0.142.254/32	10.0.142.254 – 10.0.142.254	10.0.142.254
256	10.0.142.255/32	10.0.142.255 – 10.0.142.255	10.0.142.255

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 →