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)10.2.159.0/24

network10.2.159.0/24

broadcast10.2.159.255

first host10.2.159.1

last host10.2.159.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.159.0/24

address00001010.00000010.10011111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.10011111.00000000

broadcast00001010.00000010.10011111.11111111

green = network part, grey = host part

hex0x0a029f00

decimal167943936

reverse dns0.159.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9f00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.159.0/32	10.2.159.0 – 10.2.159.0	10.2.159.0
2	10.2.159.1/32	10.2.159.1 – 10.2.159.1	10.2.159.1
3	10.2.159.2/32	10.2.159.2 – 10.2.159.2	10.2.159.2
4	10.2.159.3/32	10.2.159.3 – 10.2.159.3	10.2.159.3
5	10.2.159.4/32	10.2.159.4 – 10.2.159.4	10.2.159.4
6	10.2.159.5/32	10.2.159.5 – 10.2.159.5	10.2.159.5
7	10.2.159.6/32	10.2.159.6 – 10.2.159.6	10.2.159.6
8	10.2.159.7/32	10.2.159.7 – 10.2.159.7	10.2.159.7
9	10.2.159.8/32	10.2.159.8 – 10.2.159.8	10.2.159.8
10	10.2.159.9/32	10.2.159.9 – 10.2.159.9	10.2.159.9
11	10.2.159.10/32	10.2.159.10 – 10.2.159.10	10.2.159.10
12	10.2.159.11/32	10.2.159.11 – 10.2.159.11	10.2.159.11
13	10.2.159.12/32	10.2.159.12 – 10.2.159.12	10.2.159.12
14	10.2.159.13/32	10.2.159.13 – 10.2.159.13	10.2.159.13
15	10.2.159.14/32	10.2.159.14 – 10.2.159.14	10.2.159.14
16	10.2.159.15/32	10.2.159.15 – 10.2.159.15	10.2.159.15
17	10.2.159.16/32	10.2.159.16 – 10.2.159.16	10.2.159.16
18	10.2.159.17/32	10.2.159.17 – 10.2.159.17	10.2.159.17
19	10.2.159.18/32	10.2.159.18 – 10.2.159.18	10.2.159.18
20	10.2.159.19/32	10.2.159.19 – 10.2.159.19	10.2.159.19
21	10.2.159.20/32	10.2.159.20 – 10.2.159.20	10.2.159.20
22	10.2.159.21/32	10.2.159.21 – 10.2.159.21	10.2.159.21
23	10.2.159.22/32	10.2.159.22 – 10.2.159.22	10.2.159.22
24	10.2.159.23/32	10.2.159.23 – 10.2.159.23	10.2.159.23
25	10.2.159.24/32	10.2.159.24 – 10.2.159.24	10.2.159.24
26	10.2.159.25/32	10.2.159.25 – 10.2.159.25	10.2.159.25
27	10.2.159.26/32	10.2.159.26 – 10.2.159.26	10.2.159.26
28	10.2.159.27/32	10.2.159.27 – 10.2.159.27	10.2.159.27
29	10.2.159.28/32	10.2.159.28 – 10.2.159.28	10.2.159.28
30	10.2.159.29/32	10.2.159.29 – 10.2.159.29	10.2.159.29
31	10.2.159.30/32	10.2.159.30 – 10.2.159.30	10.2.159.30
32	10.2.159.31/32	10.2.159.31 – 10.2.159.31	10.2.159.31
33	10.2.159.32/32	10.2.159.32 – 10.2.159.32	10.2.159.32
34	10.2.159.33/32	10.2.159.33 – 10.2.159.33	10.2.159.33
35	10.2.159.34/32	10.2.159.34 – 10.2.159.34	10.2.159.34
36	10.2.159.35/32	10.2.159.35 – 10.2.159.35	10.2.159.35
37	10.2.159.36/32	10.2.159.36 – 10.2.159.36	10.2.159.36
38	10.2.159.37/32	10.2.159.37 – 10.2.159.37	10.2.159.37
39	10.2.159.38/32	10.2.159.38 – 10.2.159.38	10.2.159.38
40	10.2.159.39/32	10.2.159.39 – 10.2.159.39	10.2.159.39
41	10.2.159.40/32	10.2.159.40 – 10.2.159.40	10.2.159.40
42	10.2.159.41/32	10.2.159.41 – 10.2.159.41	10.2.159.41
43	10.2.159.42/32	10.2.159.42 – 10.2.159.42	10.2.159.42
44	10.2.159.43/32	10.2.159.43 – 10.2.159.43	10.2.159.43
45	10.2.159.44/32	10.2.159.44 – 10.2.159.44	10.2.159.44
46	10.2.159.45/32	10.2.159.45 – 10.2.159.45	10.2.159.45
47	10.2.159.46/32	10.2.159.46 – 10.2.159.46	10.2.159.46
48	10.2.159.47/32	10.2.159.47 – 10.2.159.47	10.2.159.47
49	10.2.159.48/32	10.2.159.48 – 10.2.159.48	10.2.159.48
50	10.2.159.49/32	10.2.159.49 – 10.2.159.49	10.2.159.49
51	10.2.159.50/32	10.2.159.50 – 10.2.159.50	10.2.159.50
52	10.2.159.51/32	10.2.159.51 – 10.2.159.51	10.2.159.51
53	10.2.159.52/32	10.2.159.52 – 10.2.159.52	10.2.159.52
54	10.2.159.53/32	10.2.159.53 – 10.2.159.53	10.2.159.53
55	10.2.159.54/32	10.2.159.54 – 10.2.159.54	10.2.159.54
56	10.2.159.55/32	10.2.159.55 – 10.2.159.55	10.2.159.55
57	10.2.159.56/32	10.2.159.56 – 10.2.159.56	10.2.159.56
58	10.2.159.57/32	10.2.159.57 – 10.2.159.57	10.2.159.57
59	10.2.159.58/32	10.2.159.58 – 10.2.159.58	10.2.159.58
60	10.2.159.59/32	10.2.159.59 – 10.2.159.59	10.2.159.59
61	10.2.159.60/32	10.2.159.60 – 10.2.159.60	10.2.159.60
62	10.2.159.61/32	10.2.159.61 – 10.2.159.61	10.2.159.61
63	10.2.159.62/32	10.2.159.62 – 10.2.159.62	10.2.159.62
64	10.2.159.63/32	10.2.159.63 – 10.2.159.63	10.2.159.63
65	10.2.159.64/32	10.2.159.64 – 10.2.159.64	10.2.159.64
66	10.2.159.65/32	10.2.159.65 – 10.2.159.65	10.2.159.65
67	10.2.159.66/32	10.2.159.66 – 10.2.159.66	10.2.159.66
68	10.2.159.67/32	10.2.159.67 – 10.2.159.67	10.2.159.67
69	10.2.159.68/32	10.2.159.68 – 10.2.159.68	10.2.159.68
70	10.2.159.69/32	10.2.159.69 – 10.2.159.69	10.2.159.69
71	10.2.159.70/32	10.2.159.70 – 10.2.159.70	10.2.159.70
72	10.2.159.71/32	10.2.159.71 – 10.2.159.71	10.2.159.71
73	10.2.159.72/32	10.2.159.72 – 10.2.159.72	10.2.159.72
74	10.2.159.73/32	10.2.159.73 – 10.2.159.73	10.2.159.73
75	10.2.159.74/32	10.2.159.74 – 10.2.159.74	10.2.159.74
76	10.2.159.75/32	10.2.159.75 – 10.2.159.75	10.2.159.75
77	10.2.159.76/32	10.2.159.76 – 10.2.159.76	10.2.159.76
78	10.2.159.77/32	10.2.159.77 – 10.2.159.77	10.2.159.77
79	10.2.159.78/32	10.2.159.78 – 10.2.159.78	10.2.159.78
80	10.2.159.79/32	10.2.159.79 – 10.2.159.79	10.2.159.79
81	10.2.159.80/32	10.2.159.80 – 10.2.159.80	10.2.159.80
82	10.2.159.81/32	10.2.159.81 – 10.2.159.81	10.2.159.81
83	10.2.159.82/32	10.2.159.82 – 10.2.159.82	10.2.159.82
84	10.2.159.83/32	10.2.159.83 – 10.2.159.83	10.2.159.83
85	10.2.159.84/32	10.2.159.84 – 10.2.159.84	10.2.159.84
86	10.2.159.85/32	10.2.159.85 – 10.2.159.85	10.2.159.85
87	10.2.159.86/32	10.2.159.86 – 10.2.159.86	10.2.159.86
88	10.2.159.87/32	10.2.159.87 – 10.2.159.87	10.2.159.87
89	10.2.159.88/32	10.2.159.88 – 10.2.159.88	10.2.159.88
90	10.2.159.89/32	10.2.159.89 – 10.2.159.89	10.2.159.89
91	10.2.159.90/32	10.2.159.90 – 10.2.159.90	10.2.159.90
92	10.2.159.91/32	10.2.159.91 – 10.2.159.91	10.2.159.91
93	10.2.159.92/32	10.2.159.92 – 10.2.159.92	10.2.159.92
94	10.2.159.93/32	10.2.159.93 – 10.2.159.93	10.2.159.93
95	10.2.159.94/32	10.2.159.94 – 10.2.159.94	10.2.159.94
96	10.2.159.95/32	10.2.159.95 – 10.2.159.95	10.2.159.95
97	10.2.159.96/32	10.2.159.96 – 10.2.159.96	10.2.159.96
98	10.2.159.97/32	10.2.159.97 – 10.2.159.97	10.2.159.97
99	10.2.159.98/32	10.2.159.98 – 10.2.159.98	10.2.159.98
100	10.2.159.99/32	10.2.159.99 – 10.2.159.99	10.2.159.99
101	10.2.159.100/32	10.2.159.100 – 10.2.159.100	10.2.159.100
102	10.2.159.101/32	10.2.159.101 – 10.2.159.101	10.2.159.101
103	10.2.159.102/32	10.2.159.102 – 10.2.159.102	10.2.159.102
104	10.2.159.103/32	10.2.159.103 – 10.2.159.103	10.2.159.103
105	10.2.159.104/32	10.2.159.104 – 10.2.159.104	10.2.159.104
106	10.2.159.105/32	10.2.159.105 – 10.2.159.105	10.2.159.105
107	10.2.159.106/32	10.2.159.106 – 10.2.159.106	10.2.159.106
108	10.2.159.107/32	10.2.159.107 – 10.2.159.107	10.2.159.107
109	10.2.159.108/32	10.2.159.108 – 10.2.159.108	10.2.159.108
110	10.2.159.109/32	10.2.159.109 – 10.2.159.109	10.2.159.109
111	10.2.159.110/32	10.2.159.110 – 10.2.159.110	10.2.159.110
112	10.2.159.111/32	10.2.159.111 – 10.2.159.111	10.2.159.111
113	10.2.159.112/32	10.2.159.112 – 10.2.159.112	10.2.159.112
114	10.2.159.113/32	10.2.159.113 – 10.2.159.113	10.2.159.113
115	10.2.159.114/32	10.2.159.114 – 10.2.159.114	10.2.159.114
116	10.2.159.115/32	10.2.159.115 – 10.2.159.115	10.2.159.115
117	10.2.159.116/32	10.2.159.116 – 10.2.159.116	10.2.159.116
118	10.2.159.117/32	10.2.159.117 – 10.2.159.117	10.2.159.117
119	10.2.159.118/32	10.2.159.118 – 10.2.159.118	10.2.159.118
120	10.2.159.119/32	10.2.159.119 – 10.2.159.119	10.2.159.119
121	10.2.159.120/32	10.2.159.120 – 10.2.159.120	10.2.159.120
122	10.2.159.121/32	10.2.159.121 – 10.2.159.121	10.2.159.121
123	10.2.159.122/32	10.2.159.122 – 10.2.159.122	10.2.159.122
124	10.2.159.123/32	10.2.159.123 – 10.2.159.123	10.2.159.123
125	10.2.159.124/32	10.2.159.124 – 10.2.159.124	10.2.159.124
126	10.2.159.125/32	10.2.159.125 – 10.2.159.125	10.2.159.125
127	10.2.159.126/32	10.2.159.126 – 10.2.159.126	10.2.159.126
128	10.2.159.127/32	10.2.159.127 – 10.2.159.127	10.2.159.127
129	10.2.159.128/32	10.2.159.128 – 10.2.159.128	10.2.159.128
130	10.2.159.129/32	10.2.159.129 – 10.2.159.129	10.2.159.129
131	10.2.159.130/32	10.2.159.130 – 10.2.159.130	10.2.159.130
132	10.2.159.131/32	10.2.159.131 – 10.2.159.131	10.2.159.131
133	10.2.159.132/32	10.2.159.132 – 10.2.159.132	10.2.159.132
134	10.2.159.133/32	10.2.159.133 – 10.2.159.133	10.2.159.133
135	10.2.159.134/32	10.2.159.134 – 10.2.159.134	10.2.159.134
136	10.2.159.135/32	10.2.159.135 – 10.2.159.135	10.2.159.135
137	10.2.159.136/32	10.2.159.136 – 10.2.159.136	10.2.159.136
138	10.2.159.137/32	10.2.159.137 – 10.2.159.137	10.2.159.137
139	10.2.159.138/32	10.2.159.138 – 10.2.159.138	10.2.159.138
140	10.2.159.139/32	10.2.159.139 – 10.2.159.139	10.2.159.139
141	10.2.159.140/32	10.2.159.140 – 10.2.159.140	10.2.159.140
142	10.2.159.141/32	10.2.159.141 – 10.2.159.141	10.2.159.141
143	10.2.159.142/32	10.2.159.142 – 10.2.159.142	10.2.159.142
144	10.2.159.143/32	10.2.159.143 – 10.2.159.143	10.2.159.143
145	10.2.159.144/32	10.2.159.144 – 10.2.159.144	10.2.159.144
146	10.2.159.145/32	10.2.159.145 – 10.2.159.145	10.2.159.145
147	10.2.159.146/32	10.2.159.146 – 10.2.159.146	10.2.159.146
148	10.2.159.147/32	10.2.159.147 – 10.2.159.147	10.2.159.147
149	10.2.159.148/32	10.2.159.148 – 10.2.159.148	10.2.159.148
150	10.2.159.149/32	10.2.159.149 – 10.2.159.149	10.2.159.149
151	10.2.159.150/32	10.2.159.150 – 10.2.159.150	10.2.159.150
152	10.2.159.151/32	10.2.159.151 – 10.2.159.151	10.2.159.151
153	10.2.159.152/32	10.2.159.152 – 10.2.159.152	10.2.159.152
154	10.2.159.153/32	10.2.159.153 – 10.2.159.153	10.2.159.153
155	10.2.159.154/32	10.2.159.154 – 10.2.159.154	10.2.159.154
156	10.2.159.155/32	10.2.159.155 – 10.2.159.155	10.2.159.155
157	10.2.159.156/32	10.2.159.156 – 10.2.159.156	10.2.159.156
158	10.2.159.157/32	10.2.159.157 – 10.2.159.157	10.2.159.157
159	10.2.159.158/32	10.2.159.158 – 10.2.159.158	10.2.159.158
160	10.2.159.159/32	10.2.159.159 – 10.2.159.159	10.2.159.159
161	10.2.159.160/32	10.2.159.160 – 10.2.159.160	10.2.159.160
162	10.2.159.161/32	10.2.159.161 – 10.2.159.161	10.2.159.161
163	10.2.159.162/32	10.2.159.162 – 10.2.159.162	10.2.159.162
164	10.2.159.163/32	10.2.159.163 – 10.2.159.163	10.2.159.163
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167	10.2.159.166/32	10.2.159.166 – 10.2.159.166	10.2.159.166
168	10.2.159.167/32	10.2.159.167 – 10.2.159.167	10.2.159.167
169	10.2.159.168/32	10.2.159.168 – 10.2.159.168	10.2.159.168
170	10.2.159.169/32	10.2.159.169 – 10.2.159.169	10.2.159.169
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210	10.2.159.209/32	10.2.159.209 – 10.2.159.209	10.2.159.209
211	10.2.159.210/32	10.2.159.210 – 10.2.159.210	10.2.159.210
212	10.2.159.211/32	10.2.159.211 – 10.2.159.211	10.2.159.211
213	10.2.159.212/32	10.2.159.212 – 10.2.159.212	10.2.159.212
214	10.2.159.213/32	10.2.159.213 – 10.2.159.213	10.2.159.213
215	10.2.159.214/32	10.2.159.214 – 10.2.159.214	10.2.159.214
216	10.2.159.215/32	10.2.159.215 – 10.2.159.215	10.2.159.215
217	10.2.159.216/32	10.2.159.216 – 10.2.159.216	10.2.159.216
218	10.2.159.217/32	10.2.159.217 – 10.2.159.217	10.2.159.217
219	10.2.159.218/32	10.2.159.218 – 10.2.159.218	10.2.159.218
220	10.2.159.219/32	10.2.159.219 – 10.2.159.219	10.2.159.219
221	10.2.159.220/32	10.2.159.220 – 10.2.159.220	10.2.159.220
222	10.2.159.221/32	10.2.159.221 – 10.2.159.221	10.2.159.221
223	10.2.159.222/32	10.2.159.222 – 10.2.159.222	10.2.159.222
224	10.2.159.223/32	10.2.159.223 – 10.2.159.223	10.2.159.223
225	10.2.159.224/32	10.2.159.224 – 10.2.159.224	10.2.159.224
226	10.2.159.225/32	10.2.159.225 – 10.2.159.225	10.2.159.225
227	10.2.159.226/32	10.2.159.226 – 10.2.159.226	10.2.159.226
228	10.2.159.227/32	10.2.159.227 – 10.2.159.227	10.2.159.227
229	10.2.159.228/32	10.2.159.228 – 10.2.159.228	10.2.159.228
230	10.2.159.229/32	10.2.159.229 – 10.2.159.229	10.2.159.229
231	10.2.159.230/32	10.2.159.230 – 10.2.159.230	10.2.159.230
232	10.2.159.231/32	10.2.159.231 – 10.2.159.231	10.2.159.231
233	10.2.159.232/32	10.2.159.232 – 10.2.159.232	10.2.159.232
234	10.2.159.233/32	10.2.159.233 – 10.2.159.233	10.2.159.233
235	10.2.159.234/32	10.2.159.234 – 10.2.159.234	10.2.159.234
236	10.2.159.235/32	10.2.159.235 – 10.2.159.235	10.2.159.235
237	10.2.159.236/32	10.2.159.236 – 10.2.159.236	10.2.159.236
238	10.2.159.237/32	10.2.159.237 – 10.2.159.237	10.2.159.237
239	10.2.159.238/32	10.2.159.238 – 10.2.159.238	10.2.159.238
240	10.2.159.239/32	10.2.159.239 – 10.2.159.239	10.2.159.239
241	10.2.159.240/32	10.2.159.240 – 10.2.159.240	10.2.159.240
242	10.2.159.241/32	10.2.159.241 – 10.2.159.241	10.2.159.241
243	10.2.159.242/32	10.2.159.242 – 10.2.159.242	10.2.159.242
244	10.2.159.243/32	10.2.159.243 – 10.2.159.243	10.2.159.243
245	10.2.159.244/32	10.2.159.244 – 10.2.159.244	10.2.159.244
246	10.2.159.245/32	10.2.159.245 – 10.2.159.245	10.2.159.245
247	10.2.159.246/32	10.2.159.246 – 10.2.159.246	10.2.159.246
248	10.2.159.247/32	10.2.159.247 – 10.2.159.247	10.2.159.247
249	10.2.159.248/32	10.2.159.248 – 10.2.159.248	10.2.159.248
250	10.2.159.249/32	10.2.159.249 – 10.2.159.249	10.2.159.249
251	10.2.159.250/32	10.2.159.250 – 10.2.159.250	10.2.159.250
252	10.2.159.251/32	10.2.159.251 – 10.2.159.251	10.2.159.251
253	10.2.159.252/32	10.2.159.252 – 10.2.159.252	10.2.159.252
254	10.2.159.253/32	10.2.159.253 – 10.2.159.253	10.2.159.253
255	10.2.159.254/32	10.2.159.254 – 10.2.159.254	10.2.159.254
256	10.2.159.255/32	10.2.159.255 – 10.2.159.255	10.2.159.255

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 →