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)10.0.161.0/24

network10.0.161.0/24

broadcast10.0.161.255

first host10.0.161.1

last host10.0.161.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.161.0/24

address00001010.00000000.10100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.10100001.00000000

broadcast00001010.00000000.10100001.11111111

green = network part, grey = host part

hex0x0a00a100

decimal167813376

reverse dns0.161.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:a100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.161.0/32	10.0.161.0 – 10.0.161.0	10.0.161.0
2	10.0.161.1/32	10.0.161.1 – 10.0.161.1	10.0.161.1
3	10.0.161.2/32	10.0.161.2 – 10.0.161.2	10.0.161.2
4	10.0.161.3/32	10.0.161.3 – 10.0.161.3	10.0.161.3
5	10.0.161.4/32	10.0.161.4 – 10.0.161.4	10.0.161.4
6	10.0.161.5/32	10.0.161.5 – 10.0.161.5	10.0.161.5
7	10.0.161.6/32	10.0.161.6 – 10.0.161.6	10.0.161.6
8	10.0.161.7/32	10.0.161.7 – 10.0.161.7	10.0.161.7
9	10.0.161.8/32	10.0.161.8 – 10.0.161.8	10.0.161.8
10	10.0.161.9/32	10.0.161.9 – 10.0.161.9	10.0.161.9
11	10.0.161.10/32	10.0.161.10 – 10.0.161.10	10.0.161.10
12	10.0.161.11/32	10.0.161.11 – 10.0.161.11	10.0.161.11
13	10.0.161.12/32	10.0.161.12 – 10.0.161.12	10.0.161.12
14	10.0.161.13/32	10.0.161.13 – 10.0.161.13	10.0.161.13
15	10.0.161.14/32	10.0.161.14 – 10.0.161.14	10.0.161.14
16	10.0.161.15/32	10.0.161.15 – 10.0.161.15	10.0.161.15
17	10.0.161.16/32	10.0.161.16 – 10.0.161.16	10.0.161.16
18	10.0.161.17/32	10.0.161.17 – 10.0.161.17	10.0.161.17
19	10.0.161.18/32	10.0.161.18 – 10.0.161.18	10.0.161.18
20	10.0.161.19/32	10.0.161.19 – 10.0.161.19	10.0.161.19
21	10.0.161.20/32	10.0.161.20 – 10.0.161.20	10.0.161.20
22	10.0.161.21/32	10.0.161.21 – 10.0.161.21	10.0.161.21
23	10.0.161.22/32	10.0.161.22 – 10.0.161.22	10.0.161.22
24	10.0.161.23/32	10.0.161.23 – 10.0.161.23	10.0.161.23
25	10.0.161.24/32	10.0.161.24 – 10.0.161.24	10.0.161.24
26	10.0.161.25/32	10.0.161.25 – 10.0.161.25	10.0.161.25
27	10.0.161.26/32	10.0.161.26 – 10.0.161.26	10.0.161.26
28	10.0.161.27/32	10.0.161.27 – 10.0.161.27	10.0.161.27
29	10.0.161.28/32	10.0.161.28 – 10.0.161.28	10.0.161.28
30	10.0.161.29/32	10.0.161.29 – 10.0.161.29	10.0.161.29
31	10.0.161.30/32	10.0.161.30 – 10.0.161.30	10.0.161.30
32	10.0.161.31/32	10.0.161.31 – 10.0.161.31	10.0.161.31
33	10.0.161.32/32	10.0.161.32 – 10.0.161.32	10.0.161.32
34	10.0.161.33/32	10.0.161.33 – 10.0.161.33	10.0.161.33
35	10.0.161.34/32	10.0.161.34 – 10.0.161.34	10.0.161.34
36	10.0.161.35/32	10.0.161.35 – 10.0.161.35	10.0.161.35
37	10.0.161.36/32	10.0.161.36 – 10.0.161.36	10.0.161.36
38	10.0.161.37/32	10.0.161.37 – 10.0.161.37	10.0.161.37
39	10.0.161.38/32	10.0.161.38 – 10.0.161.38	10.0.161.38
40	10.0.161.39/32	10.0.161.39 – 10.0.161.39	10.0.161.39
41	10.0.161.40/32	10.0.161.40 – 10.0.161.40	10.0.161.40
42	10.0.161.41/32	10.0.161.41 – 10.0.161.41	10.0.161.41
43	10.0.161.42/32	10.0.161.42 – 10.0.161.42	10.0.161.42
44	10.0.161.43/32	10.0.161.43 – 10.0.161.43	10.0.161.43
45	10.0.161.44/32	10.0.161.44 – 10.0.161.44	10.0.161.44
46	10.0.161.45/32	10.0.161.45 – 10.0.161.45	10.0.161.45
47	10.0.161.46/32	10.0.161.46 – 10.0.161.46	10.0.161.46
48	10.0.161.47/32	10.0.161.47 – 10.0.161.47	10.0.161.47
49	10.0.161.48/32	10.0.161.48 – 10.0.161.48	10.0.161.48
50	10.0.161.49/32	10.0.161.49 – 10.0.161.49	10.0.161.49
51	10.0.161.50/32	10.0.161.50 – 10.0.161.50	10.0.161.50
52	10.0.161.51/32	10.0.161.51 – 10.0.161.51	10.0.161.51
53	10.0.161.52/32	10.0.161.52 – 10.0.161.52	10.0.161.52
54	10.0.161.53/32	10.0.161.53 – 10.0.161.53	10.0.161.53
55	10.0.161.54/32	10.0.161.54 – 10.0.161.54	10.0.161.54
56	10.0.161.55/32	10.0.161.55 – 10.0.161.55	10.0.161.55
57	10.0.161.56/32	10.0.161.56 – 10.0.161.56	10.0.161.56
58	10.0.161.57/32	10.0.161.57 – 10.0.161.57	10.0.161.57
59	10.0.161.58/32	10.0.161.58 – 10.0.161.58	10.0.161.58
60	10.0.161.59/32	10.0.161.59 – 10.0.161.59	10.0.161.59
61	10.0.161.60/32	10.0.161.60 – 10.0.161.60	10.0.161.60
62	10.0.161.61/32	10.0.161.61 – 10.0.161.61	10.0.161.61
63	10.0.161.62/32	10.0.161.62 – 10.0.161.62	10.0.161.62
64	10.0.161.63/32	10.0.161.63 – 10.0.161.63	10.0.161.63
65	10.0.161.64/32	10.0.161.64 – 10.0.161.64	10.0.161.64
66	10.0.161.65/32	10.0.161.65 – 10.0.161.65	10.0.161.65
67	10.0.161.66/32	10.0.161.66 – 10.0.161.66	10.0.161.66
68	10.0.161.67/32	10.0.161.67 – 10.0.161.67	10.0.161.67
69	10.0.161.68/32	10.0.161.68 – 10.0.161.68	10.0.161.68
70	10.0.161.69/32	10.0.161.69 – 10.0.161.69	10.0.161.69
71	10.0.161.70/32	10.0.161.70 – 10.0.161.70	10.0.161.70
72	10.0.161.71/32	10.0.161.71 – 10.0.161.71	10.0.161.71
73	10.0.161.72/32	10.0.161.72 – 10.0.161.72	10.0.161.72
74	10.0.161.73/32	10.0.161.73 – 10.0.161.73	10.0.161.73
75	10.0.161.74/32	10.0.161.74 – 10.0.161.74	10.0.161.74
76	10.0.161.75/32	10.0.161.75 – 10.0.161.75	10.0.161.75
77	10.0.161.76/32	10.0.161.76 – 10.0.161.76	10.0.161.76
78	10.0.161.77/32	10.0.161.77 – 10.0.161.77	10.0.161.77
79	10.0.161.78/32	10.0.161.78 – 10.0.161.78	10.0.161.78
80	10.0.161.79/32	10.0.161.79 – 10.0.161.79	10.0.161.79
81	10.0.161.80/32	10.0.161.80 – 10.0.161.80	10.0.161.80
82	10.0.161.81/32	10.0.161.81 – 10.0.161.81	10.0.161.81
83	10.0.161.82/32	10.0.161.82 – 10.0.161.82	10.0.161.82
84	10.0.161.83/32	10.0.161.83 – 10.0.161.83	10.0.161.83
85	10.0.161.84/32	10.0.161.84 – 10.0.161.84	10.0.161.84
86	10.0.161.85/32	10.0.161.85 – 10.0.161.85	10.0.161.85
87	10.0.161.86/32	10.0.161.86 – 10.0.161.86	10.0.161.86
88	10.0.161.87/32	10.0.161.87 – 10.0.161.87	10.0.161.87
89	10.0.161.88/32	10.0.161.88 – 10.0.161.88	10.0.161.88
90	10.0.161.89/32	10.0.161.89 – 10.0.161.89	10.0.161.89
91	10.0.161.90/32	10.0.161.90 – 10.0.161.90	10.0.161.90
92	10.0.161.91/32	10.0.161.91 – 10.0.161.91	10.0.161.91
93	10.0.161.92/32	10.0.161.92 – 10.0.161.92	10.0.161.92
94	10.0.161.93/32	10.0.161.93 – 10.0.161.93	10.0.161.93
95	10.0.161.94/32	10.0.161.94 – 10.0.161.94	10.0.161.94
96	10.0.161.95/32	10.0.161.95 – 10.0.161.95	10.0.161.95
97	10.0.161.96/32	10.0.161.96 – 10.0.161.96	10.0.161.96
98	10.0.161.97/32	10.0.161.97 – 10.0.161.97	10.0.161.97
99	10.0.161.98/32	10.0.161.98 – 10.0.161.98	10.0.161.98
100	10.0.161.99/32	10.0.161.99 – 10.0.161.99	10.0.161.99
101	10.0.161.100/32	10.0.161.100 – 10.0.161.100	10.0.161.100
102	10.0.161.101/32	10.0.161.101 – 10.0.161.101	10.0.161.101
103	10.0.161.102/32	10.0.161.102 – 10.0.161.102	10.0.161.102
104	10.0.161.103/32	10.0.161.103 – 10.0.161.103	10.0.161.103
105	10.0.161.104/32	10.0.161.104 – 10.0.161.104	10.0.161.104
106	10.0.161.105/32	10.0.161.105 – 10.0.161.105	10.0.161.105
107	10.0.161.106/32	10.0.161.106 – 10.0.161.106	10.0.161.106
108	10.0.161.107/32	10.0.161.107 – 10.0.161.107	10.0.161.107
109	10.0.161.108/32	10.0.161.108 – 10.0.161.108	10.0.161.108
110	10.0.161.109/32	10.0.161.109 – 10.0.161.109	10.0.161.109
111	10.0.161.110/32	10.0.161.110 – 10.0.161.110	10.0.161.110
112	10.0.161.111/32	10.0.161.111 – 10.0.161.111	10.0.161.111
113	10.0.161.112/32	10.0.161.112 – 10.0.161.112	10.0.161.112
114	10.0.161.113/32	10.0.161.113 – 10.0.161.113	10.0.161.113
115	10.0.161.114/32	10.0.161.114 – 10.0.161.114	10.0.161.114
116	10.0.161.115/32	10.0.161.115 – 10.0.161.115	10.0.161.115
117	10.0.161.116/32	10.0.161.116 – 10.0.161.116	10.0.161.116
118	10.0.161.117/32	10.0.161.117 – 10.0.161.117	10.0.161.117
119	10.0.161.118/32	10.0.161.118 – 10.0.161.118	10.0.161.118
120	10.0.161.119/32	10.0.161.119 – 10.0.161.119	10.0.161.119
121	10.0.161.120/32	10.0.161.120 – 10.0.161.120	10.0.161.120
122	10.0.161.121/32	10.0.161.121 – 10.0.161.121	10.0.161.121
123	10.0.161.122/32	10.0.161.122 – 10.0.161.122	10.0.161.122
124	10.0.161.123/32	10.0.161.123 – 10.0.161.123	10.0.161.123
125	10.0.161.124/32	10.0.161.124 – 10.0.161.124	10.0.161.124
126	10.0.161.125/32	10.0.161.125 – 10.0.161.125	10.0.161.125
127	10.0.161.126/32	10.0.161.126 – 10.0.161.126	10.0.161.126
128	10.0.161.127/32	10.0.161.127 – 10.0.161.127	10.0.161.127
129	10.0.161.128/32	10.0.161.128 – 10.0.161.128	10.0.161.128
130	10.0.161.129/32	10.0.161.129 – 10.0.161.129	10.0.161.129
131	10.0.161.130/32	10.0.161.130 – 10.0.161.130	10.0.161.130
132	10.0.161.131/32	10.0.161.131 – 10.0.161.131	10.0.161.131
133	10.0.161.132/32	10.0.161.132 – 10.0.161.132	10.0.161.132
134	10.0.161.133/32	10.0.161.133 – 10.0.161.133	10.0.161.133
135	10.0.161.134/32	10.0.161.134 – 10.0.161.134	10.0.161.134
136	10.0.161.135/32	10.0.161.135 – 10.0.161.135	10.0.161.135
137	10.0.161.136/32	10.0.161.136 – 10.0.161.136	10.0.161.136
138	10.0.161.137/32	10.0.161.137 – 10.0.161.137	10.0.161.137
139	10.0.161.138/32	10.0.161.138 – 10.0.161.138	10.0.161.138
140	10.0.161.139/32	10.0.161.139 – 10.0.161.139	10.0.161.139
141	10.0.161.140/32	10.0.161.140 – 10.0.161.140	10.0.161.140
142	10.0.161.141/32	10.0.161.141 – 10.0.161.141	10.0.161.141
143	10.0.161.142/32	10.0.161.142 – 10.0.161.142	10.0.161.142
144	10.0.161.143/32	10.0.161.143 – 10.0.161.143	10.0.161.143
145	10.0.161.144/32	10.0.161.144 – 10.0.161.144	10.0.161.144
146	10.0.161.145/32	10.0.161.145 – 10.0.161.145	10.0.161.145
147	10.0.161.146/32	10.0.161.146 – 10.0.161.146	10.0.161.146
148	10.0.161.147/32	10.0.161.147 – 10.0.161.147	10.0.161.147
149	10.0.161.148/32	10.0.161.148 – 10.0.161.148	10.0.161.148
150	10.0.161.149/32	10.0.161.149 – 10.0.161.149	10.0.161.149
151	10.0.161.150/32	10.0.161.150 – 10.0.161.150	10.0.161.150
152	10.0.161.151/32	10.0.161.151 – 10.0.161.151	10.0.161.151
153	10.0.161.152/32	10.0.161.152 – 10.0.161.152	10.0.161.152
154	10.0.161.153/32	10.0.161.153 – 10.0.161.153	10.0.161.153
155	10.0.161.154/32	10.0.161.154 – 10.0.161.154	10.0.161.154
156	10.0.161.155/32	10.0.161.155 – 10.0.161.155	10.0.161.155
157	10.0.161.156/32	10.0.161.156 – 10.0.161.156	10.0.161.156
158	10.0.161.157/32	10.0.161.157 – 10.0.161.157	10.0.161.157
159	10.0.161.158/32	10.0.161.158 – 10.0.161.158	10.0.161.158
160	10.0.161.159/32	10.0.161.159 – 10.0.161.159	10.0.161.159
161	10.0.161.160/32	10.0.161.160 – 10.0.161.160	10.0.161.160
162	10.0.161.161/32	10.0.161.161 – 10.0.161.161	10.0.161.161
163	10.0.161.162/32	10.0.161.162 – 10.0.161.162	10.0.161.162
164	10.0.161.163/32	10.0.161.163 – 10.0.161.163	10.0.161.163
165	10.0.161.164/32	10.0.161.164 – 10.0.161.164	10.0.161.164
166	10.0.161.165/32	10.0.161.165 – 10.0.161.165	10.0.161.165
167	10.0.161.166/32	10.0.161.166 – 10.0.161.166	10.0.161.166
168	10.0.161.167/32	10.0.161.167 – 10.0.161.167	10.0.161.167
169	10.0.161.168/32	10.0.161.168 – 10.0.161.168	10.0.161.168
170	10.0.161.169/32	10.0.161.169 – 10.0.161.169	10.0.161.169
171	10.0.161.170/32	10.0.161.170 – 10.0.161.170	10.0.161.170
172	10.0.161.171/32	10.0.161.171 – 10.0.161.171	10.0.161.171
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174	10.0.161.173/32	10.0.161.173 – 10.0.161.173	10.0.161.173
175	10.0.161.174/32	10.0.161.174 – 10.0.161.174	10.0.161.174
176	10.0.161.175/32	10.0.161.175 – 10.0.161.175	10.0.161.175
177	10.0.161.176/32	10.0.161.176 – 10.0.161.176	10.0.161.176
178	10.0.161.177/32	10.0.161.177 – 10.0.161.177	10.0.161.177
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200	10.0.161.199/32	10.0.161.199 – 10.0.161.199	10.0.161.199
201	10.0.161.200/32	10.0.161.200 – 10.0.161.200	10.0.161.200
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208	10.0.161.207/32	10.0.161.207 – 10.0.161.207	10.0.161.207
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210	10.0.161.209/32	10.0.161.209 – 10.0.161.209	10.0.161.209
211	10.0.161.210/32	10.0.161.210 – 10.0.161.210	10.0.161.210
212	10.0.161.211/32	10.0.161.211 – 10.0.161.211	10.0.161.211
213	10.0.161.212/32	10.0.161.212 – 10.0.161.212	10.0.161.212
214	10.0.161.213/32	10.0.161.213 – 10.0.161.213	10.0.161.213
215	10.0.161.214/32	10.0.161.214 – 10.0.161.214	10.0.161.214
216	10.0.161.215/32	10.0.161.215 – 10.0.161.215	10.0.161.215
217	10.0.161.216/32	10.0.161.216 – 10.0.161.216	10.0.161.216
218	10.0.161.217/32	10.0.161.217 – 10.0.161.217	10.0.161.217
219	10.0.161.218/32	10.0.161.218 – 10.0.161.218	10.0.161.218
220	10.0.161.219/32	10.0.161.219 – 10.0.161.219	10.0.161.219
221	10.0.161.220/32	10.0.161.220 – 10.0.161.220	10.0.161.220
222	10.0.161.221/32	10.0.161.221 – 10.0.161.221	10.0.161.221
223	10.0.161.222/32	10.0.161.222 – 10.0.161.222	10.0.161.222
224	10.0.161.223/32	10.0.161.223 – 10.0.161.223	10.0.161.223
225	10.0.161.224/32	10.0.161.224 – 10.0.161.224	10.0.161.224
226	10.0.161.225/32	10.0.161.225 – 10.0.161.225	10.0.161.225
227	10.0.161.226/32	10.0.161.226 – 10.0.161.226	10.0.161.226
228	10.0.161.227/32	10.0.161.227 – 10.0.161.227	10.0.161.227
229	10.0.161.228/32	10.0.161.228 – 10.0.161.228	10.0.161.228
230	10.0.161.229/32	10.0.161.229 – 10.0.161.229	10.0.161.229
231	10.0.161.230/32	10.0.161.230 – 10.0.161.230	10.0.161.230
232	10.0.161.231/32	10.0.161.231 – 10.0.161.231	10.0.161.231
233	10.0.161.232/32	10.0.161.232 – 10.0.161.232	10.0.161.232
234	10.0.161.233/32	10.0.161.233 – 10.0.161.233	10.0.161.233
235	10.0.161.234/32	10.0.161.234 – 10.0.161.234	10.0.161.234
236	10.0.161.235/32	10.0.161.235 – 10.0.161.235	10.0.161.235
237	10.0.161.236/32	10.0.161.236 – 10.0.161.236	10.0.161.236
238	10.0.161.237/32	10.0.161.237 – 10.0.161.237	10.0.161.237
239	10.0.161.238/32	10.0.161.238 – 10.0.161.238	10.0.161.238
240	10.0.161.239/32	10.0.161.239 – 10.0.161.239	10.0.161.239
241	10.0.161.240/32	10.0.161.240 – 10.0.161.240	10.0.161.240
242	10.0.161.241/32	10.0.161.241 – 10.0.161.241	10.0.161.241
243	10.0.161.242/32	10.0.161.242 – 10.0.161.242	10.0.161.242
244	10.0.161.243/32	10.0.161.243 – 10.0.161.243	10.0.161.243
245	10.0.161.244/32	10.0.161.244 – 10.0.161.244	10.0.161.244
246	10.0.161.245/32	10.0.161.245 – 10.0.161.245	10.0.161.245
247	10.0.161.246/32	10.0.161.246 – 10.0.161.246	10.0.161.246
248	10.0.161.247/32	10.0.161.247 – 10.0.161.247	10.0.161.247
249	10.0.161.248/32	10.0.161.248 – 10.0.161.248	10.0.161.248
250	10.0.161.249/32	10.0.161.249 – 10.0.161.249	10.0.161.249
251	10.0.161.250/32	10.0.161.250 – 10.0.161.250	10.0.161.250
252	10.0.161.251/32	10.0.161.251 – 10.0.161.251	10.0.161.251
253	10.0.161.252/32	10.0.161.252 – 10.0.161.252	10.0.161.252
254	10.0.161.253/32	10.0.161.253 – 10.0.161.253	10.0.161.253
255	10.0.161.254/32	10.0.161.254 – 10.0.161.254	10.0.161.254
256	10.0.161.255/32	10.0.161.255 – 10.0.161.255	10.0.161.255

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 →