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)10.2.146.0/23

network10.2.146.0/23

broadcast10.2.147.255

first host10.2.146.1

last host10.2.147.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.146.0/23

address00001010.00000010.10010010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.10010010.00000000

broadcast00001010.00000010.10010011.11111111

green = network part, grey = host part

hex0x0a029200

decimal167940608

reverse dns0.146.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9200

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.2.146.0/32	10.2.146.0 – 10.2.146.0	10.2.146.0
2	10.2.146.1/32	10.2.146.1 – 10.2.146.1	10.2.146.1
3	10.2.146.2/32	10.2.146.2 – 10.2.146.2	10.2.146.2
4	10.2.146.3/32	10.2.146.3 – 10.2.146.3	10.2.146.3
5	10.2.146.4/32	10.2.146.4 – 10.2.146.4	10.2.146.4
6	10.2.146.5/32	10.2.146.5 – 10.2.146.5	10.2.146.5
7	10.2.146.6/32	10.2.146.6 – 10.2.146.6	10.2.146.6
8	10.2.146.7/32	10.2.146.7 – 10.2.146.7	10.2.146.7
9	10.2.146.8/32	10.2.146.8 – 10.2.146.8	10.2.146.8
10	10.2.146.9/32	10.2.146.9 – 10.2.146.9	10.2.146.9
11	10.2.146.10/32	10.2.146.10 – 10.2.146.10	10.2.146.10
12	10.2.146.11/32	10.2.146.11 – 10.2.146.11	10.2.146.11
13	10.2.146.12/32	10.2.146.12 – 10.2.146.12	10.2.146.12
14	10.2.146.13/32	10.2.146.13 – 10.2.146.13	10.2.146.13
15	10.2.146.14/32	10.2.146.14 – 10.2.146.14	10.2.146.14
16	10.2.146.15/32	10.2.146.15 – 10.2.146.15	10.2.146.15
17	10.2.146.16/32	10.2.146.16 – 10.2.146.16	10.2.146.16
18	10.2.146.17/32	10.2.146.17 – 10.2.146.17	10.2.146.17
19	10.2.146.18/32	10.2.146.18 – 10.2.146.18	10.2.146.18
20	10.2.146.19/32	10.2.146.19 – 10.2.146.19	10.2.146.19
21	10.2.146.20/32	10.2.146.20 – 10.2.146.20	10.2.146.20
22	10.2.146.21/32	10.2.146.21 – 10.2.146.21	10.2.146.21
23	10.2.146.22/32	10.2.146.22 – 10.2.146.22	10.2.146.22
24	10.2.146.23/32	10.2.146.23 – 10.2.146.23	10.2.146.23
25	10.2.146.24/32	10.2.146.24 – 10.2.146.24	10.2.146.24
26	10.2.146.25/32	10.2.146.25 – 10.2.146.25	10.2.146.25
27	10.2.146.26/32	10.2.146.26 – 10.2.146.26	10.2.146.26
28	10.2.146.27/32	10.2.146.27 – 10.2.146.27	10.2.146.27
29	10.2.146.28/32	10.2.146.28 – 10.2.146.28	10.2.146.28
30	10.2.146.29/32	10.2.146.29 – 10.2.146.29	10.2.146.29
31	10.2.146.30/32	10.2.146.30 – 10.2.146.30	10.2.146.30
32	10.2.146.31/32	10.2.146.31 – 10.2.146.31	10.2.146.31
33	10.2.146.32/32	10.2.146.32 – 10.2.146.32	10.2.146.32
34	10.2.146.33/32	10.2.146.33 – 10.2.146.33	10.2.146.33
35	10.2.146.34/32	10.2.146.34 – 10.2.146.34	10.2.146.34
36	10.2.146.35/32	10.2.146.35 – 10.2.146.35	10.2.146.35
37	10.2.146.36/32	10.2.146.36 – 10.2.146.36	10.2.146.36
38	10.2.146.37/32	10.2.146.37 – 10.2.146.37	10.2.146.37
39	10.2.146.38/32	10.2.146.38 – 10.2.146.38	10.2.146.38
40	10.2.146.39/32	10.2.146.39 – 10.2.146.39	10.2.146.39
41	10.2.146.40/32	10.2.146.40 – 10.2.146.40	10.2.146.40
42	10.2.146.41/32	10.2.146.41 – 10.2.146.41	10.2.146.41
43	10.2.146.42/32	10.2.146.42 – 10.2.146.42	10.2.146.42
44	10.2.146.43/32	10.2.146.43 – 10.2.146.43	10.2.146.43
45	10.2.146.44/32	10.2.146.44 – 10.2.146.44	10.2.146.44
46	10.2.146.45/32	10.2.146.45 – 10.2.146.45	10.2.146.45
47	10.2.146.46/32	10.2.146.46 – 10.2.146.46	10.2.146.46
48	10.2.146.47/32	10.2.146.47 – 10.2.146.47	10.2.146.47
49	10.2.146.48/32	10.2.146.48 – 10.2.146.48	10.2.146.48
50	10.2.146.49/32	10.2.146.49 – 10.2.146.49	10.2.146.49
51	10.2.146.50/32	10.2.146.50 – 10.2.146.50	10.2.146.50
52	10.2.146.51/32	10.2.146.51 – 10.2.146.51	10.2.146.51
53	10.2.146.52/32	10.2.146.52 – 10.2.146.52	10.2.146.52
54	10.2.146.53/32	10.2.146.53 – 10.2.146.53	10.2.146.53
55	10.2.146.54/32	10.2.146.54 – 10.2.146.54	10.2.146.54
56	10.2.146.55/32	10.2.146.55 – 10.2.146.55	10.2.146.55
57	10.2.146.56/32	10.2.146.56 – 10.2.146.56	10.2.146.56
58	10.2.146.57/32	10.2.146.57 – 10.2.146.57	10.2.146.57
59	10.2.146.58/32	10.2.146.58 – 10.2.146.58	10.2.146.58
60	10.2.146.59/32	10.2.146.59 – 10.2.146.59	10.2.146.59
61	10.2.146.60/32	10.2.146.60 – 10.2.146.60	10.2.146.60
62	10.2.146.61/32	10.2.146.61 – 10.2.146.61	10.2.146.61
63	10.2.146.62/32	10.2.146.62 – 10.2.146.62	10.2.146.62
64	10.2.146.63/32	10.2.146.63 – 10.2.146.63	10.2.146.63
65	10.2.146.64/32	10.2.146.64 – 10.2.146.64	10.2.146.64
66	10.2.146.65/32	10.2.146.65 – 10.2.146.65	10.2.146.65
67	10.2.146.66/32	10.2.146.66 – 10.2.146.66	10.2.146.66
68	10.2.146.67/32	10.2.146.67 – 10.2.146.67	10.2.146.67
69	10.2.146.68/32	10.2.146.68 – 10.2.146.68	10.2.146.68
70	10.2.146.69/32	10.2.146.69 – 10.2.146.69	10.2.146.69
71	10.2.146.70/32	10.2.146.70 – 10.2.146.70	10.2.146.70
72	10.2.146.71/32	10.2.146.71 – 10.2.146.71	10.2.146.71
73	10.2.146.72/32	10.2.146.72 – 10.2.146.72	10.2.146.72
74	10.2.146.73/32	10.2.146.73 – 10.2.146.73	10.2.146.73
75	10.2.146.74/32	10.2.146.74 – 10.2.146.74	10.2.146.74
76	10.2.146.75/32	10.2.146.75 – 10.2.146.75	10.2.146.75
77	10.2.146.76/32	10.2.146.76 – 10.2.146.76	10.2.146.76
78	10.2.146.77/32	10.2.146.77 – 10.2.146.77	10.2.146.77
79	10.2.146.78/32	10.2.146.78 – 10.2.146.78	10.2.146.78
80	10.2.146.79/32	10.2.146.79 – 10.2.146.79	10.2.146.79
81	10.2.146.80/32	10.2.146.80 – 10.2.146.80	10.2.146.80
82	10.2.146.81/32	10.2.146.81 – 10.2.146.81	10.2.146.81
83	10.2.146.82/32	10.2.146.82 – 10.2.146.82	10.2.146.82
84	10.2.146.83/32	10.2.146.83 – 10.2.146.83	10.2.146.83
85	10.2.146.84/32	10.2.146.84 – 10.2.146.84	10.2.146.84
86	10.2.146.85/32	10.2.146.85 – 10.2.146.85	10.2.146.85
87	10.2.146.86/32	10.2.146.86 – 10.2.146.86	10.2.146.86
88	10.2.146.87/32	10.2.146.87 – 10.2.146.87	10.2.146.87
89	10.2.146.88/32	10.2.146.88 – 10.2.146.88	10.2.146.88
90	10.2.146.89/32	10.2.146.89 – 10.2.146.89	10.2.146.89
91	10.2.146.90/32	10.2.146.90 – 10.2.146.90	10.2.146.90
92	10.2.146.91/32	10.2.146.91 – 10.2.146.91	10.2.146.91
93	10.2.146.92/32	10.2.146.92 – 10.2.146.92	10.2.146.92
94	10.2.146.93/32	10.2.146.93 – 10.2.146.93	10.2.146.93
95	10.2.146.94/32	10.2.146.94 – 10.2.146.94	10.2.146.94
96	10.2.146.95/32	10.2.146.95 – 10.2.146.95	10.2.146.95
97	10.2.146.96/32	10.2.146.96 – 10.2.146.96	10.2.146.96
98	10.2.146.97/32	10.2.146.97 – 10.2.146.97	10.2.146.97
99	10.2.146.98/32	10.2.146.98 – 10.2.146.98	10.2.146.98
100	10.2.146.99/32	10.2.146.99 – 10.2.146.99	10.2.146.99
101	10.2.146.100/32	10.2.146.100 – 10.2.146.100	10.2.146.100
102	10.2.146.101/32	10.2.146.101 – 10.2.146.101	10.2.146.101
103	10.2.146.102/32	10.2.146.102 – 10.2.146.102	10.2.146.102
104	10.2.146.103/32	10.2.146.103 – 10.2.146.103	10.2.146.103
105	10.2.146.104/32	10.2.146.104 – 10.2.146.104	10.2.146.104
106	10.2.146.105/32	10.2.146.105 – 10.2.146.105	10.2.146.105
107	10.2.146.106/32	10.2.146.106 – 10.2.146.106	10.2.146.106
108	10.2.146.107/32	10.2.146.107 – 10.2.146.107	10.2.146.107
109	10.2.146.108/32	10.2.146.108 – 10.2.146.108	10.2.146.108
110	10.2.146.109/32	10.2.146.109 – 10.2.146.109	10.2.146.109
111	10.2.146.110/32	10.2.146.110 – 10.2.146.110	10.2.146.110
112	10.2.146.111/32	10.2.146.111 – 10.2.146.111	10.2.146.111
113	10.2.146.112/32	10.2.146.112 – 10.2.146.112	10.2.146.112
114	10.2.146.113/32	10.2.146.113 – 10.2.146.113	10.2.146.113
115	10.2.146.114/32	10.2.146.114 – 10.2.146.114	10.2.146.114
116	10.2.146.115/32	10.2.146.115 – 10.2.146.115	10.2.146.115
117	10.2.146.116/32	10.2.146.116 – 10.2.146.116	10.2.146.116
118	10.2.146.117/32	10.2.146.117 – 10.2.146.117	10.2.146.117
119	10.2.146.118/32	10.2.146.118 – 10.2.146.118	10.2.146.118
120	10.2.146.119/32	10.2.146.119 – 10.2.146.119	10.2.146.119
121	10.2.146.120/32	10.2.146.120 – 10.2.146.120	10.2.146.120
122	10.2.146.121/32	10.2.146.121 – 10.2.146.121	10.2.146.121
123	10.2.146.122/32	10.2.146.122 – 10.2.146.122	10.2.146.122
124	10.2.146.123/32	10.2.146.123 – 10.2.146.123	10.2.146.123
125	10.2.146.124/32	10.2.146.124 – 10.2.146.124	10.2.146.124
126	10.2.146.125/32	10.2.146.125 – 10.2.146.125	10.2.146.125
127	10.2.146.126/32	10.2.146.126 – 10.2.146.126	10.2.146.126
128	10.2.146.127/32	10.2.146.127 – 10.2.146.127	10.2.146.127
129	10.2.146.128/32	10.2.146.128 – 10.2.146.128	10.2.146.128
130	10.2.146.129/32	10.2.146.129 – 10.2.146.129	10.2.146.129
131	10.2.146.130/32	10.2.146.130 – 10.2.146.130	10.2.146.130
132	10.2.146.131/32	10.2.146.131 – 10.2.146.131	10.2.146.131
133	10.2.146.132/32	10.2.146.132 – 10.2.146.132	10.2.146.132
134	10.2.146.133/32	10.2.146.133 – 10.2.146.133	10.2.146.133
135	10.2.146.134/32	10.2.146.134 – 10.2.146.134	10.2.146.134
136	10.2.146.135/32	10.2.146.135 – 10.2.146.135	10.2.146.135
137	10.2.146.136/32	10.2.146.136 – 10.2.146.136	10.2.146.136
138	10.2.146.137/32	10.2.146.137 – 10.2.146.137	10.2.146.137
139	10.2.146.138/32	10.2.146.138 – 10.2.146.138	10.2.146.138
140	10.2.146.139/32	10.2.146.139 – 10.2.146.139	10.2.146.139
141	10.2.146.140/32	10.2.146.140 – 10.2.146.140	10.2.146.140
142	10.2.146.141/32	10.2.146.141 – 10.2.146.141	10.2.146.141
143	10.2.146.142/32	10.2.146.142 – 10.2.146.142	10.2.146.142
144	10.2.146.143/32	10.2.146.143 – 10.2.146.143	10.2.146.143
145	10.2.146.144/32	10.2.146.144 – 10.2.146.144	10.2.146.144
146	10.2.146.145/32	10.2.146.145 – 10.2.146.145	10.2.146.145
147	10.2.146.146/32	10.2.146.146 – 10.2.146.146	10.2.146.146
148	10.2.146.147/32	10.2.146.147 – 10.2.146.147	10.2.146.147
149	10.2.146.148/32	10.2.146.148 – 10.2.146.148	10.2.146.148
150	10.2.146.149/32	10.2.146.149 – 10.2.146.149	10.2.146.149
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152	10.2.146.151/32	10.2.146.151 – 10.2.146.151	10.2.146.151
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157	10.2.146.156/32	10.2.146.156 – 10.2.146.156	10.2.146.156
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210	10.2.146.209/32	10.2.146.209 – 10.2.146.209	10.2.146.209
211	10.2.146.210/32	10.2.146.210 – 10.2.146.210	10.2.146.210
212	10.2.146.211/32	10.2.146.211 – 10.2.146.211	10.2.146.211
213	10.2.146.212/32	10.2.146.212 – 10.2.146.212	10.2.146.212
214	10.2.146.213/32	10.2.146.213 – 10.2.146.213	10.2.146.213
215	10.2.146.214/32	10.2.146.214 – 10.2.146.214	10.2.146.214
216	10.2.146.215/32	10.2.146.215 – 10.2.146.215	10.2.146.215
217	10.2.146.216/32	10.2.146.216 – 10.2.146.216	10.2.146.216
218	10.2.146.217/32	10.2.146.217 – 10.2.146.217	10.2.146.217
219	10.2.146.218/32	10.2.146.218 – 10.2.146.218	10.2.146.218
220	10.2.146.219/32	10.2.146.219 – 10.2.146.219	10.2.146.219
221	10.2.146.220/32	10.2.146.220 – 10.2.146.220	10.2.146.220
222	10.2.146.221/32	10.2.146.221 – 10.2.146.221	10.2.146.221
223	10.2.146.222/32	10.2.146.222 – 10.2.146.222	10.2.146.222
224	10.2.146.223/32	10.2.146.223 – 10.2.146.223	10.2.146.223
225	10.2.146.224/32	10.2.146.224 – 10.2.146.224	10.2.146.224
226	10.2.146.225/32	10.2.146.225 – 10.2.146.225	10.2.146.225
227	10.2.146.226/32	10.2.146.226 – 10.2.146.226	10.2.146.226
228	10.2.146.227/32	10.2.146.227 – 10.2.146.227	10.2.146.227
229	10.2.146.228/32	10.2.146.228 – 10.2.146.228	10.2.146.228
230	10.2.146.229/32	10.2.146.229 – 10.2.146.229	10.2.146.229
231	10.2.146.230/32	10.2.146.230 – 10.2.146.230	10.2.146.230
232	10.2.146.231/32	10.2.146.231 – 10.2.146.231	10.2.146.231
233	10.2.146.232/32	10.2.146.232 – 10.2.146.232	10.2.146.232
234	10.2.146.233/32	10.2.146.233 – 10.2.146.233	10.2.146.233
235	10.2.146.234/32	10.2.146.234 – 10.2.146.234	10.2.146.234
236	10.2.146.235/32	10.2.146.235 – 10.2.146.235	10.2.146.235
237	10.2.146.236/32	10.2.146.236 – 10.2.146.236	10.2.146.236
238	10.2.146.237/32	10.2.146.237 – 10.2.146.237	10.2.146.237
239	10.2.146.238/32	10.2.146.238 – 10.2.146.238	10.2.146.238
240	10.2.146.239/32	10.2.146.239 – 10.2.146.239	10.2.146.239
241	10.2.146.240/32	10.2.146.240 – 10.2.146.240	10.2.146.240
242	10.2.146.241/32	10.2.146.241 – 10.2.146.241	10.2.146.241
243	10.2.146.242/32	10.2.146.242 – 10.2.146.242	10.2.146.242
244	10.2.146.243/32	10.2.146.243 – 10.2.146.243	10.2.146.243
245	10.2.146.244/32	10.2.146.244 – 10.2.146.244	10.2.146.244
246	10.2.146.245/32	10.2.146.245 – 10.2.146.245	10.2.146.245
247	10.2.146.246/32	10.2.146.246 – 10.2.146.246	10.2.146.246
248	10.2.146.247/32	10.2.146.247 – 10.2.146.247	10.2.146.247
249	10.2.146.248/32	10.2.146.248 – 10.2.146.248	10.2.146.248
250	10.2.146.249/32	10.2.146.249 – 10.2.146.249	10.2.146.249
251	10.2.146.250/32	10.2.146.250 – 10.2.146.250	10.2.146.250
252	10.2.146.251/32	10.2.146.251 – 10.2.146.251	10.2.146.251
253	10.2.146.252/32	10.2.146.252 – 10.2.146.252	10.2.146.252
254	10.2.146.253/32	10.2.146.253 – 10.2.146.253	10.2.146.253
255	10.2.146.254/32	10.2.146.254 – 10.2.146.254	10.2.146.254
256	10.2.146.255/32	10.2.146.255 – 10.2.146.255	10.2.146.255

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 →