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)10.87.38.0/24

network10.87.38.0/24

broadcast10.87.38.255

first host10.87.38.1

last host10.87.38.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.87.38.0/24

address00001010.01010111.00100110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01010111.00100110.00000000

broadcast00001010.01010111.00100110.11111111

green = network part, grey = host part

hex0x0a572600

decimal173483520

reverse dns0.38.87.10.in-addr.arpa

ipv4-mapped::ffff:a57:2600

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.87.38.0/32	10.87.38.0 – 10.87.38.0	10.87.38.0
2	10.87.38.1/32	10.87.38.1 – 10.87.38.1	10.87.38.1
3	10.87.38.2/32	10.87.38.2 – 10.87.38.2	10.87.38.2
4	10.87.38.3/32	10.87.38.3 – 10.87.38.3	10.87.38.3
5	10.87.38.4/32	10.87.38.4 – 10.87.38.4	10.87.38.4
6	10.87.38.5/32	10.87.38.5 – 10.87.38.5	10.87.38.5
7	10.87.38.6/32	10.87.38.6 – 10.87.38.6	10.87.38.6
8	10.87.38.7/32	10.87.38.7 – 10.87.38.7	10.87.38.7
9	10.87.38.8/32	10.87.38.8 – 10.87.38.8	10.87.38.8
10	10.87.38.9/32	10.87.38.9 – 10.87.38.9	10.87.38.9
11	10.87.38.10/32	10.87.38.10 – 10.87.38.10	10.87.38.10
12	10.87.38.11/32	10.87.38.11 – 10.87.38.11	10.87.38.11
13	10.87.38.12/32	10.87.38.12 – 10.87.38.12	10.87.38.12
14	10.87.38.13/32	10.87.38.13 – 10.87.38.13	10.87.38.13
15	10.87.38.14/32	10.87.38.14 – 10.87.38.14	10.87.38.14
16	10.87.38.15/32	10.87.38.15 – 10.87.38.15	10.87.38.15
17	10.87.38.16/32	10.87.38.16 – 10.87.38.16	10.87.38.16
18	10.87.38.17/32	10.87.38.17 – 10.87.38.17	10.87.38.17
19	10.87.38.18/32	10.87.38.18 – 10.87.38.18	10.87.38.18
20	10.87.38.19/32	10.87.38.19 – 10.87.38.19	10.87.38.19
21	10.87.38.20/32	10.87.38.20 – 10.87.38.20	10.87.38.20
22	10.87.38.21/32	10.87.38.21 – 10.87.38.21	10.87.38.21
23	10.87.38.22/32	10.87.38.22 – 10.87.38.22	10.87.38.22
24	10.87.38.23/32	10.87.38.23 – 10.87.38.23	10.87.38.23
25	10.87.38.24/32	10.87.38.24 – 10.87.38.24	10.87.38.24
26	10.87.38.25/32	10.87.38.25 – 10.87.38.25	10.87.38.25
27	10.87.38.26/32	10.87.38.26 – 10.87.38.26	10.87.38.26
28	10.87.38.27/32	10.87.38.27 – 10.87.38.27	10.87.38.27
29	10.87.38.28/32	10.87.38.28 – 10.87.38.28	10.87.38.28
30	10.87.38.29/32	10.87.38.29 – 10.87.38.29	10.87.38.29
31	10.87.38.30/32	10.87.38.30 – 10.87.38.30	10.87.38.30
32	10.87.38.31/32	10.87.38.31 – 10.87.38.31	10.87.38.31
33	10.87.38.32/32	10.87.38.32 – 10.87.38.32	10.87.38.32
34	10.87.38.33/32	10.87.38.33 – 10.87.38.33	10.87.38.33
35	10.87.38.34/32	10.87.38.34 – 10.87.38.34	10.87.38.34
36	10.87.38.35/32	10.87.38.35 – 10.87.38.35	10.87.38.35
37	10.87.38.36/32	10.87.38.36 – 10.87.38.36	10.87.38.36
38	10.87.38.37/32	10.87.38.37 – 10.87.38.37	10.87.38.37
39	10.87.38.38/32	10.87.38.38 – 10.87.38.38	10.87.38.38
40	10.87.38.39/32	10.87.38.39 – 10.87.38.39	10.87.38.39
41	10.87.38.40/32	10.87.38.40 – 10.87.38.40	10.87.38.40
42	10.87.38.41/32	10.87.38.41 – 10.87.38.41	10.87.38.41
43	10.87.38.42/32	10.87.38.42 – 10.87.38.42	10.87.38.42
44	10.87.38.43/32	10.87.38.43 – 10.87.38.43	10.87.38.43
45	10.87.38.44/32	10.87.38.44 – 10.87.38.44	10.87.38.44
46	10.87.38.45/32	10.87.38.45 – 10.87.38.45	10.87.38.45
47	10.87.38.46/32	10.87.38.46 – 10.87.38.46	10.87.38.46
48	10.87.38.47/32	10.87.38.47 – 10.87.38.47	10.87.38.47
49	10.87.38.48/32	10.87.38.48 – 10.87.38.48	10.87.38.48
50	10.87.38.49/32	10.87.38.49 – 10.87.38.49	10.87.38.49
51	10.87.38.50/32	10.87.38.50 – 10.87.38.50	10.87.38.50
52	10.87.38.51/32	10.87.38.51 – 10.87.38.51	10.87.38.51
53	10.87.38.52/32	10.87.38.52 – 10.87.38.52	10.87.38.52
54	10.87.38.53/32	10.87.38.53 – 10.87.38.53	10.87.38.53
55	10.87.38.54/32	10.87.38.54 – 10.87.38.54	10.87.38.54
56	10.87.38.55/32	10.87.38.55 – 10.87.38.55	10.87.38.55
57	10.87.38.56/32	10.87.38.56 – 10.87.38.56	10.87.38.56
58	10.87.38.57/32	10.87.38.57 – 10.87.38.57	10.87.38.57
59	10.87.38.58/32	10.87.38.58 – 10.87.38.58	10.87.38.58
60	10.87.38.59/32	10.87.38.59 – 10.87.38.59	10.87.38.59
61	10.87.38.60/32	10.87.38.60 – 10.87.38.60	10.87.38.60
62	10.87.38.61/32	10.87.38.61 – 10.87.38.61	10.87.38.61
63	10.87.38.62/32	10.87.38.62 – 10.87.38.62	10.87.38.62
64	10.87.38.63/32	10.87.38.63 – 10.87.38.63	10.87.38.63
65	10.87.38.64/32	10.87.38.64 – 10.87.38.64	10.87.38.64
66	10.87.38.65/32	10.87.38.65 – 10.87.38.65	10.87.38.65
67	10.87.38.66/32	10.87.38.66 – 10.87.38.66	10.87.38.66
68	10.87.38.67/32	10.87.38.67 – 10.87.38.67	10.87.38.67
69	10.87.38.68/32	10.87.38.68 – 10.87.38.68	10.87.38.68
70	10.87.38.69/32	10.87.38.69 – 10.87.38.69	10.87.38.69
71	10.87.38.70/32	10.87.38.70 – 10.87.38.70	10.87.38.70
72	10.87.38.71/32	10.87.38.71 – 10.87.38.71	10.87.38.71
73	10.87.38.72/32	10.87.38.72 – 10.87.38.72	10.87.38.72
74	10.87.38.73/32	10.87.38.73 – 10.87.38.73	10.87.38.73
75	10.87.38.74/32	10.87.38.74 – 10.87.38.74	10.87.38.74
76	10.87.38.75/32	10.87.38.75 – 10.87.38.75	10.87.38.75
77	10.87.38.76/32	10.87.38.76 – 10.87.38.76	10.87.38.76
78	10.87.38.77/32	10.87.38.77 – 10.87.38.77	10.87.38.77
79	10.87.38.78/32	10.87.38.78 – 10.87.38.78	10.87.38.78
80	10.87.38.79/32	10.87.38.79 – 10.87.38.79	10.87.38.79
81	10.87.38.80/32	10.87.38.80 – 10.87.38.80	10.87.38.80
82	10.87.38.81/32	10.87.38.81 – 10.87.38.81	10.87.38.81
83	10.87.38.82/32	10.87.38.82 – 10.87.38.82	10.87.38.82
84	10.87.38.83/32	10.87.38.83 – 10.87.38.83	10.87.38.83
85	10.87.38.84/32	10.87.38.84 – 10.87.38.84	10.87.38.84
86	10.87.38.85/32	10.87.38.85 – 10.87.38.85	10.87.38.85
87	10.87.38.86/32	10.87.38.86 – 10.87.38.86	10.87.38.86
88	10.87.38.87/32	10.87.38.87 – 10.87.38.87	10.87.38.87
89	10.87.38.88/32	10.87.38.88 – 10.87.38.88	10.87.38.88
90	10.87.38.89/32	10.87.38.89 – 10.87.38.89	10.87.38.89
91	10.87.38.90/32	10.87.38.90 – 10.87.38.90	10.87.38.90
92	10.87.38.91/32	10.87.38.91 – 10.87.38.91	10.87.38.91
93	10.87.38.92/32	10.87.38.92 – 10.87.38.92	10.87.38.92
94	10.87.38.93/32	10.87.38.93 – 10.87.38.93	10.87.38.93
95	10.87.38.94/32	10.87.38.94 – 10.87.38.94	10.87.38.94
96	10.87.38.95/32	10.87.38.95 – 10.87.38.95	10.87.38.95
97	10.87.38.96/32	10.87.38.96 – 10.87.38.96	10.87.38.96
98	10.87.38.97/32	10.87.38.97 – 10.87.38.97	10.87.38.97
99	10.87.38.98/32	10.87.38.98 – 10.87.38.98	10.87.38.98
100	10.87.38.99/32	10.87.38.99 – 10.87.38.99	10.87.38.99
101	10.87.38.100/32	10.87.38.100 – 10.87.38.100	10.87.38.100
102	10.87.38.101/32	10.87.38.101 – 10.87.38.101	10.87.38.101
103	10.87.38.102/32	10.87.38.102 – 10.87.38.102	10.87.38.102
104	10.87.38.103/32	10.87.38.103 – 10.87.38.103	10.87.38.103
105	10.87.38.104/32	10.87.38.104 – 10.87.38.104	10.87.38.104
106	10.87.38.105/32	10.87.38.105 – 10.87.38.105	10.87.38.105
107	10.87.38.106/32	10.87.38.106 – 10.87.38.106	10.87.38.106
108	10.87.38.107/32	10.87.38.107 – 10.87.38.107	10.87.38.107
109	10.87.38.108/32	10.87.38.108 – 10.87.38.108	10.87.38.108
110	10.87.38.109/32	10.87.38.109 – 10.87.38.109	10.87.38.109
111	10.87.38.110/32	10.87.38.110 – 10.87.38.110	10.87.38.110
112	10.87.38.111/32	10.87.38.111 – 10.87.38.111	10.87.38.111
113	10.87.38.112/32	10.87.38.112 – 10.87.38.112	10.87.38.112
114	10.87.38.113/32	10.87.38.113 – 10.87.38.113	10.87.38.113
115	10.87.38.114/32	10.87.38.114 – 10.87.38.114	10.87.38.114
116	10.87.38.115/32	10.87.38.115 – 10.87.38.115	10.87.38.115
117	10.87.38.116/32	10.87.38.116 – 10.87.38.116	10.87.38.116
118	10.87.38.117/32	10.87.38.117 – 10.87.38.117	10.87.38.117
119	10.87.38.118/32	10.87.38.118 – 10.87.38.118	10.87.38.118
120	10.87.38.119/32	10.87.38.119 – 10.87.38.119	10.87.38.119
121	10.87.38.120/32	10.87.38.120 – 10.87.38.120	10.87.38.120
122	10.87.38.121/32	10.87.38.121 – 10.87.38.121	10.87.38.121
123	10.87.38.122/32	10.87.38.122 – 10.87.38.122	10.87.38.122
124	10.87.38.123/32	10.87.38.123 – 10.87.38.123	10.87.38.123
125	10.87.38.124/32	10.87.38.124 – 10.87.38.124	10.87.38.124
126	10.87.38.125/32	10.87.38.125 – 10.87.38.125	10.87.38.125
127	10.87.38.126/32	10.87.38.126 – 10.87.38.126	10.87.38.126
128	10.87.38.127/32	10.87.38.127 – 10.87.38.127	10.87.38.127
129	10.87.38.128/32	10.87.38.128 – 10.87.38.128	10.87.38.128
130	10.87.38.129/32	10.87.38.129 – 10.87.38.129	10.87.38.129
131	10.87.38.130/32	10.87.38.130 – 10.87.38.130	10.87.38.130
132	10.87.38.131/32	10.87.38.131 – 10.87.38.131	10.87.38.131
133	10.87.38.132/32	10.87.38.132 – 10.87.38.132	10.87.38.132
134	10.87.38.133/32	10.87.38.133 – 10.87.38.133	10.87.38.133
135	10.87.38.134/32	10.87.38.134 – 10.87.38.134	10.87.38.134
136	10.87.38.135/32	10.87.38.135 – 10.87.38.135	10.87.38.135
137	10.87.38.136/32	10.87.38.136 – 10.87.38.136	10.87.38.136
138	10.87.38.137/32	10.87.38.137 – 10.87.38.137	10.87.38.137
139	10.87.38.138/32	10.87.38.138 – 10.87.38.138	10.87.38.138
140	10.87.38.139/32	10.87.38.139 – 10.87.38.139	10.87.38.139
141	10.87.38.140/32	10.87.38.140 – 10.87.38.140	10.87.38.140
142	10.87.38.141/32	10.87.38.141 – 10.87.38.141	10.87.38.141
143	10.87.38.142/32	10.87.38.142 – 10.87.38.142	10.87.38.142
144	10.87.38.143/32	10.87.38.143 – 10.87.38.143	10.87.38.143
145	10.87.38.144/32	10.87.38.144 – 10.87.38.144	10.87.38.144
146	10.87.38.145/32	10.87.38.145 – 10.87.38.145	10.87.38.145
147	10.87.38.146/32	10.87.38.146 – 10.87.38.146	10.87.38.146
148	10.87.38.147/32	10.87.38.147 – 10.87.38.147	10.87.38.147
149	10.87.38.148/32	10.87.38.148 – 10.87.38.148	10.87.38.148
150	10.87.38.149/32	10.87.38.149 – 10.87.38.149	10.87.38.149
151	10.87.38.150/32	10.87.38.150 – 10.87.38.150	10.87.38.150
152	10.87.38.151/32	10.87.38.151 – 10.87.38.151	10.87.38.151
153	10.87.38.152/32	10.87.38.152 – 10.87.38.152	10.87.38.152
154	10.87.38.153/32	10.87.38.153 – 10.87.38.153	10.87.38.153
155	10.87.38.154/32	10.87.38.154 – 10.87.38.154	10.87.38.154
156	10.87.38.155/32	10.87.38.155 – 10.87.38.155	10.87.38.155
157	10.87.38.156/32	10.87.38.156 – 10.87.38.156	10.87.38.156
158	10.87.38.157/32	10.87.38.157 – 10.87.38.157	10.87.38.157
159	10.87.38.158/32	10.87.38.158 – 10.87.38.158	10.87.38.158
160	10.87.38.159/32	10.87.38.159 – 10.87.38.159	10.87.38.159
161	10.87.38.160/32	10.87.38.160 – 10.87.38.160	10.87.38.160
162	10.87.38.161/32	10.87.38.161 – 10.87.38.161	10.87.38.161
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168	10.87.38.167/32	10.87.38.167 – 10.87.38.167	10.87.38.167
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170	10.87.38.169/32	10.87.38.169 – 10.87.38.169	10.87.38.169
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210	10.87.38.209/32	10.87.38.209 – 10.87.38.209	10.87.38.209
211	10.87.38.210/32	10.87.38.210 – 10.87.38.210	10.87.38.210
212	10.87.38.211/32	10.87.38.211 – 10.87.38.211	10.87.38.211
213	10.87.38.212/32	10.87.38.212 – 10.87.38.212	10.87.38.212
214	10.87.38.213/32	10.87.38.213 – 10.87.38.213	10.87.38.213
215	10.87.38.214/32	10.87.38.214 – 10.87.38.214	10.87.38.214
216	10.87.38.215/32	10.87.38.215 – 10.87.38.215	10.87.38.215
217	10.87.38.216/32	10.87.38.216 – 10.87.38.216	10.87.38.216
218	10.87.38.217/32	10.87.38.217 – 10.87.38.217	10.87.38.217
219	10.87.38.218/32	10.87.38.218 – 10.87.38.218	10.87.38.218
220	10.87.38.219/32	10.87.38.219 – 10.87.38.219	10.87.38.219
221	10.87.38.220/32	10.87.38.220 – 10.87.38.220	10.87.38.220
222	10.87.38.221/32	10.87.38.221 – 10.87.38.221	10.87.38.221
223	10.87.38.222/32	10.87.38.222 – 10.87.38.222	10.87.38.222
224	10.87.38.223/32	10.87.38.223 – 10.87.38.223	10.87.38.223
225	10.87.38.224/32	10.87.38.224 – 10.87.38.224	10.87.38.224
226	10.87.38.225/32	10.87.38.225 – 10.87.38.225	10.87.38.225
227	10.87.38.226/32	10.87.38.226 – 10.87.38.226	10.87.38.226
228	10.87.38.227/32	10.87.38.227 – 10.87.38.227	10.87.38.227
229	10.87.38.228/32	10.87.38.228 – 10.87.38.228	10.87.38.228
230	10.87.38.229/32	10.87.38.229 – 10.87.38.229	10.87.38.229
231	10.87.38.230/32	10.87.38.230 – 10.87.38.230	10.87.38.230
232	10.87.38.231/32	10.87.38.231 – 10.87.38.231	10.87.38.231
233	10.87.38.232/32	10.87.38.232 – 10.87.38.232	10.87.38.232
234	10.87.38.233/32	10.87.38.233 – 10.87.38.233	10.87.38.233
235	10.87.38.234/32	10.87.38.234 – 10.87.38.234	10.87.38.234
236	10.87.38.235/32	10.87.38.235 – 10.87.38.235	10.87.38.235
237	10.87.38.236/32	10.87.38.236 – 10.87.38.236	10.87.38.236
238	10.87.38.237/32	10.87.38.237 – 10.87.38.237	10.87.38.237
239	10.87.38.238/32	10.87.38.238 – 10.87.38.238	10.87.38.238
240	10.87.38.239/32	10.87.38.239 – 10.87.38.239	10.87.38.239
241	10.87.38.240/32	10.87.38.240 – 10.87.38.240	10.87.38.240
242	10.87.38.241/32	10.87.38.241 – 10.87.38.241	10.87.38.241
243	10.87.38.242/32	10.87.38.242 – 10.87.38.242	10.87.38.242
244	10.87.38.243/32	10.87.38.243 – 10.87.38.243	10.87.38.243
245	10.87.38.244/32	10.87.38.244 – 10.87.38.244	10.87.38.244
246	10.87.38.245/32	10.87.38.245 – 10.87.38.245	10.87.38.245
247	10.87.38.246/32	10.87.38.246 – 10.87.38.246	10.87.38.246
248	10.87.38.247/32	10.87.38.247 – 10.87.38.247	10.87.38.247
249	10.87.38.248/32	10.87.38.248 – 10.87.38.248	10.87.38.248
250	10.87.38.249/32	10.87.38.249 – 10.87.38.249	10.87.38.249
251	10.87.38.250/32	10.87.38.250 – 10.87.38.250	10.87.38.250
252	10.87.38.251/32	10.87.38.251 – 10.87.38.251	10.87.38.251
253	10.87.38.252/32	10.87.38.252 – 10.87.38.252	10.87.38.252
254	10.87.38.253/32	10.87.38.253 – 10.87.38.253	10.87.38.253
255	10.87.38.254/32	10.87.38.254 – 10.87.38.254	10.87.38.254
256	10.87.38.255/32	10.87.38.255 – 10.87.38.255	10.87.38.255

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 →