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)172.16.13.0/24

network172.16.13.0/24

broadcast172.16.13.255

first host172.16.13.1

last host172.16.13.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classB

ipcalc 172.16.13.0/24

address10101100.00010000.00001101.00000000

subnet mask11111111.11111111.11111111.00000000

network10101100.00010000.00001101.00000000

broadcast10101100.00010000.00001101.11111111

green = network part, grey = host part

hex0xac100d00

decimal2886733056

reverse dns0.13.16.172.in-addr.arpa

ipv4-mapped::ffff:ac10:d00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	172.16.13.0/32	172.16.13.0 – 172.16.13.0	172.16.13.0
2	172.16.13.1/32	172.16.13.1 – 172.16.13.1	172.16.13.1
3	172.16.13.2/32	172.16.13.2 – 172.16.13.2	172.16.13.2
4	172.16.13.3/32	172.16.13.3 – 172.16.13.3	172.16.13.3
5	172.16.13.4/32	172.16.13.4 – 172.16.13.4	172.16.13.4
6	172.16.13.5/32	172.16.13.5 – 172.16.13.5	172.16.13.5
7	172.16.13.6/32	172.16.13.6 – 172.16.13.6	172.16.13.6
8	172.16.13.7/32	172.16.13.7 – 172.16.13.7	172.16.13.7
9	172.16.13.8/32	172.16.13.8 – 172.16.13.8	172.16.13.8
10	172.16.13.9/32	172.16.13.9 – 172.16.13.9	172.16.13.9
11	172.16.13.10/32	172.16.13.10 – 172.16.13.10	172.16.13.10
12	172.16.13.11/32	172.16.13.11 – 172.16.13.11	172.16.13.11
13	172.16.13.12/32	172.16.13.12 – 172.16.13.12	172.16.13.12
14	172.16.13.13/32	172.16.13.13 – 172.16.13.13	172.16.13.13
15	172.16.13.14/32	172.16.13.14 – 172.16.13.14	172.16.13.14
16	172.16.13.15/32	172.16.13.15 – 172.16.13.15	172.16.13.15
17	172.16.13.16/32	172.16.13.16 – 172.16.13.16	172.16.13.16
18	172.16.13.17/32	172.16.13.17 – 172.16.13.17	172.16.13.17
19	172.16.13.18/32	172.16.13.18 – 172.16.13.18	172.16.13.18
20	172.16.13.19/32	172.16.13.19 – 172.16.13.19	172.16.13.19
21	172.16.13.20/32	172.16.13.20 – 172.16.13.20	172.16.13.20
22	172.16.13.21/32	172.16.13.21 – 172.16.13.21	172.16.13.21
23	172.16.13.22/32	172.16.13.22 – 172.16.13.22	172.16.13.22
24	172.16.13.23/32	172.16.13.23 – 172.16.13.23	172.16.13.23
25	172.16.13.24/32	172.16.13.24 – 172.16.13.24	172.16.13.24
26	172.16.13.25/32	172.16.13.25 – 172.16.13.25	172.16.13.25
27	172.16.13.26/32	172.16.13.26 – 172.16.13.26	172.16.13.26
28	172.16.13.27/32	172.16.13.27 – 172.16.13.27	172.16.13.27
29	172.16.13.28/32	172.16.13.28 – 172.16.13.28	172.16.13.28
30	172.16.13.29/32	172.16.13.29 – 172.16.13.29	172.16.13.29
31	172.16.13.30/32	172.16.13.30 – 172.16.13.30	172.16.13.30
32	172.16.13.31/32	172.16.13.31 – 172.16.13.31	172.16.13.31
33	172.16.13.32/32	172.16.13.32 – 172.16.13.32	172.16.13.32
34	172.16.13.33/32	172.16.13.33 – 172.16.13.33	172.16.13.33
35	172.16.13.34/32	172.16.13.34 – 172.16.13.34	172.16.13.34
36	172.16.13.35/32	172.16.13.35 – 172.16.13.35	172.16.13.35
37	172.16.13.36/32	172.16.13.36 – 172.16.13.36	172.16.13.36
38	172.16.13.37/32	172.16.13.37 – 172.16.13.37	172.16.13.37
39	172.16.13.38/32	172.16.13.38 – 172.16.13.38	172.16.13.38
40	172.16.13.39/32	172.16.13.39 – 172.16.13.39	172.16.13.39
41	172.16.13.40/32	172.16.13.40 – 172.16.13.40	172.16.13.40
42	172.16.13.41/32	172.16.13.41 – 172.16.13.41	172.16.13.41
43	172.16.13.42/32	172.16.13.42 – 172.16.13.42	172.16.13.42
44	172.16.13.43/32	172.16.13.43 – 172.16.13.43	172.16.13.43
45	172.16.13.44/32	172.16.13.44 – 172.16.13.44	172.16.13.44
46	172.16.13.45/32	172.16.13.45 – 172.16.13.45	172.16.13.45
47	172.16.13.46/32	172.16.13.46 – 172.16.13.46	172.16.13.46
48	172.16.13.47/32	172.16.13.47 – 172.16.13.47	172.16.13.47
49	172.16.13.48/32	172.16.13.48 – 172.16.13.48	172.16.13.48
50	172.16.13.49/32	172.16.13.49 – 172.16.13.49	172.16.13.49
51	172.16.13.50/32	172.16.13.50 – 172.16.13.50	172.16.13.50
52	172.16.13.51/32	172.16.13.51 – 172.16.13.51	172.16.13.51
53	172.16.13.52/32	172.16.13.52 – 172.16.13.52	172.16.13.52
54	172.16.13.53/32	172.16.13.53 – 172.16.13.53	172.16.13.53
55	172.16.13.54/32	172.16.13.54 – 172.16.13.54	172.16.13.54
56	172.16.13.55/32	172.16.13.55 – 172.16.13.55	172.16.13.55
57	172.16.13.56/32	172.16.13.56 – 172.16.13.56	172.16.13.56
58	172.16.13.57/32	172.16.13.57 – 172.16.13.57	172.16.13.57
59	172.16.13.58/32	172.16.13.58 – 172.16.13.58	172.16.13.58
60	172.16.13.59/32	172.16.13.59 – 172.16.13.59	172.16.13.59
61	172.16.13.60/32	172.16.13.60 – 172.16.13.60	172.16.13.60
62	172.16.13.61/32	172.16.13.61 – 172.16.13.61	172.16.13.61
63	172.16.13.62/32	172.16.13.62 – 172.16.13.62	172.16.13.62
64	172.16.13.63/32	172.16.13.63 – 172.16.13.63	172.16.13.63
65	172.16.13.64/32	172.16.13.64 – 172.16.13.64	172.16.13.64
66	172.16.13.65/32	172.16.13.65 – 172.16.13.65	172.16.13.65
67	172.16.13.66/32	172.16.13.66 – 172.16.13.66	172.16.13.66
68	172.16.13.67/32	172.16.13.67 – 172.16.13.67	172.16.13.67
69	172.16.13.68/32	172.16.13.68 – 172.16.13.68	172.16.13.68
70	172.16.13.69/32	172.16.13.69 – 172.16.13.69	172.16.13.69
71	172.16.13.70/32	172.16.13.70 – 172.16.13.70	172.16.13.70
72	172.16.13.71/32	172.16.13.71 – 172.16.13.71	172.16.13.71
73	172.16.13.72/32	172.16.13.72 – 172.16.13.72	172.16.13.72
74	172.16.13.73/32	172.16.13.73 – 172.16.13.73	172.16.13.73
75	172.16.13.74/32	172.16.13.74 – 172.16.13.74	172.16.13.74
76	172.16.13.75/32	172.16.13.75 – 172.16.13.75	172.16.13.75
77	172.16.13.76/32	172.16.13.76 – 172.16.13.76	172.16.13.76
78	172.16.13.77/32	172.16.13.77 – 172.16.13.77	172.16.13.77
79	172.16.13.78/32	172.16.13.78 – 172.16.13.78	172.16.13.78
80	172.16.13.79/32	172.16.13.79 – 172.16.13.79	172.16.13.79
81	172.16.13.80/32	172.16.13.80 – 172.16.13.80	172.16.13.80
82	172.16.13.81/32	172.16.13.81 – 172.16.13.81	172.16.13.81
83	172.16.13.82/32	172.16.13.82 – 172.16.13.82	172.16.13.82
84	172.16.13.83/32	172.16.13.83 – 172.16.13.83	172.16.13.83
85	172.16.13.84/32	172.16.13.84 – 172.16.13.84	172.16.13.84
86	172.16.13.85/32	172.16.13.85 – 172.16.13.85	172.16.13.85
87	172.16.13.86/32	172.16.13.86 – 172.16.13.86	172.16.13.86
88	172.16.13.87/32	172.16.13.87 – 172.16.13.87	172.16.13.87
89	172.16.13.88/32	172.16.13.88 – 172.16.13.88	172.16.13.88
90	172.16.13.89/32	172.16.13.89 – 172.16.13.89	172.16.13.89
91	172.16.13.90/32	172.16.13.90 – 172.16.13.90	172.16.13.90
92	172.16.13.91/32	172.16.13.91 – 172.16.13.91	172.16.13.91
93	172.16.13.92/32	172.16.13.92 – 172.16.13.92	172.16.13.92
94	172.16.13.93/32	172.16.13.93 – 172.16.13.93	172.16.13.93
95	172.16.13.94/32	172.16.13.94 – 172.16.13.94	172.16.13.94
96	172.16.13.95/32	172.16.13.95 – 172.16.13.95	172.16.13.95
97	172.16.13.96/32	172.16.13.96 – 172.16.13.96	172.16.13.96
98	172.16.13.97/32	172.16.13.97 – 172.16.13.97	172.16.13.97
99	172.16.13.98/32	172.16.13.98 – 172.16.13.98	172.16.13.98
100	172.16.13.99/32	172.16.13.99 – 172.16.13.99	172.16.13.99
101	172.16.13.100/32	172.16.13.100 – 172.16.13.100	172.16.13.100
102	172.16.13.101/32	172.16.13.101 – 172.16.13.101	172.16.13.101
103	172.16.13.102/32	172.16.13.102 – 172.16.13.102	172.16.13.102
104	172.16.13.103/32	172.16.13.103 – 172.16.13.103	172.16.13.103
105	172.16.13.104/32	172.16.13.104 – 172.16.13.104	172.16.13.104
106	172.16.13.105/32	172.16.13.105 – 172.16.13.105	172.16.13.105
107	172.16.13.106/32	172.16.13.106 – 172.16.13.106	172.16.13.106
108	172.16.13.107/32	172.16.13.107 – 172.16.13.107	172.16.13.107
109	172.16.13.108/32	172.16.13.108 – 172.16.13.108	172.16.13.108
110	172.16.13.109/32	172.16.13.109 – 172.16.13.109	172.16.13.109
111	172.16.13.110/32	172.16.13.110 – 172.16.13.110	172.16.13.110
112	172.16.13.111/32	172.16.13.111 – 172.16.13.111	172.16.13.111
113	172.16.13.112/32	172.16.13.112 – 172.16.13.112	172.16.13.112
114	172.16.13.113/32	172.16.13.113 – 172.16.13.113	172.16.13.113
115	172.16.13.114/32	172.16.13.114 – 172.16.13.114	172.16.13.114
116	172.16.13.115/32	172.16.13.115 – 172.16.13.115	172.16.13.115
117	172.16.13.116/32	172.16.13.116 – 172.16.13.116	172.16.13.116
118	172.16.13.117/32	172.16.13.117 – 172.16.13.117	172.16.13.117
119	172.16.13.118/32	172.16.13.118 – 172.16.13.118	172.16.13.118
120	172.16.13.119/32	172.16.13.119 – 172.16.13.119	172.16.13.119
121	172.16.13.120/32	172.16.13.120 – 172.16.13.120	172.16.13.120
122	172.16.13.121/32	172.16.13.121 – 172.16.13.121	172.16.13.121
123	172.16.13.122/32	172.16.13.122 – 172.16.13.122	172.16.13.122
124	172.16.13.123/32	172.16.13.123 – 172.16.13.123	172.16.13.123
125	172.16.13.124/32	172.16.13.124 – 172.16.13.124	172.16.13.124
126	172.16.13.125/32	172.16.13.125 – 172.16.13.125	172.16.13.125
127	172.16.13.126/32	172.16.13.126 – 172.16.13.126	172.16.13.126
128	172.16.13.127/32	172.16.13.127 – 172.16.13.127	172.16.13.127
129	172.16.13.128/32	172.16.13.128 – 172.16.13.128	172.16.13.128
130	172.16.13.129/32	172.16.13.129 – 172.16.13.129	172.16.13.129
131	172.16.13.130/32	172.16.13.130 – 172.16.13.130	172.16.13.130
132	172.16.13.131/32	172.16.13.131 – 172.16.13.131	172.16.13.131
133	172.16.13.132/32	172.16.13.132 – 172.16.13.132	172.16.13.132
134	172.16.13.133/32	172.16.13.133 – 172.16.13.133	172.16.13.133
135	172.16.13.134/32	172.16.13.134 – 172.16.13.134	172.16.13.134
136	172.16.13.135/32	172.16.13.135 – 172.16.13.135	172.16.13.135
137	172.16.13.136/32	172.16.13.136 – 172.16.13.136	172.16.13.136
138	172.16.13.137/32	172.16.13.137 – 172.16.13.137	172.16.13.137
139	172.16.13.138/32	172.16.13.138 – 172.16.13.138	172.16.13.138
140	172.16.13.139/32	172.16.13.139 – 172.16.13.139	172.16.13.139
141	172.16.13.140/32	172.16.13.140 – 172.16.13.140	172.16.13.140
142	172.16.13.141/32	172.16.13.141 – 172.16.13.141	172.16.13.141
143	172.16.13.142/32	172.16.13.142 – 172.16.13.142	172.16.13.142
144	172.16.13.143/32	172.16.13.143 – 172.16.13.143	172.16.13.143
145	172.16.13.144/32	172.16.13.144 – 172.16.13.144	172.16.13.144
146	172.16.13.145/32	172.16.13.145 – 172.16.13.145	172.16.13.145
147	172.16.13.146/32	172.16.13.146 – 172.16.13.146	172.16.13.146
148	172.16.13.147/32	172.16.13.147 – 172.16.13.147	172.16.13.147
149	172.16.13.148/32	172.16.13.148 – 172.16.13.148	172.16.13.148
150	172.16.13.149/32	172.16.13.149 – 172.16.13.149	172.16.13.149
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155	172.16.13.154/32	172.16.13.154 – 172.16.13.154	172.16.13.154
156	172.16.13.155/32	172.16.13.155 – 172.16.13.155	172.16.13.155
157	172.16.13.156/32	172.16.13.156 – 172.16.13.156	172.16.13.156
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159	172.16.13.158/32	172.16.13.158 – 172.16.13.158	172.16.13.158
160	172.16.13.159/32	172.16.13.159 – 172.16.13.159	172.16.13.159
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210	172.16.13.209/32	172.16.13.209 – 172.16.13.209	172.16.13.209
211	172.16.13.210/32	172.16.13.210 – 172.16.13.210	172.16.13.210
212	172.16.13.211/32	172.16.13.211 – 172.16.13.211	172.16.13.211
213	172.16.13.212/32	172.16.13.212 – 172.16.13.212	172.16.13.212
214	172.16.13.213/32	172.16.13.213 – 172.16.13.213	172.16.13.213
215	172.16.13.214/32	172.16.13.214 – 172.16.13.214	172.16.13.214
216	172.16.13.215/32	172.16.13.215 – 172.16.13.215	172.16.13.215
217	172.16.13.216/32	172.16.13.216 – 172.16.13.216	172.16.13.216
218	172.16.13.217/32	172.16.13.217 – 172.16.13.217	172.16.13.217
219	172.16.13.218/32	172.16.13.218 – 172.16.13.218	172.16.13.218
220	172.16.13.219/32	172.16.13.219 – 172.16.13.219	172.16.13.219
221	172.16.13.220/32	172.16.13.220 – 172.16.13.220	172.16.13.220
222	172.16.13.221/32	172.16.13.221 – 172.16.13.221	172.16.13.221
223	172.16.13.222/32	172.16.13.222 – 172.16.13.222	172.16.13.222
224	172.16.13.223/32	172.16.13.223 – 172.16.13.223	172.16.13.223
225	172.16.13.224/32	172.16.13.224 – 172.16.13.224	172.16.13.224
226	172.16.13.225/32	172.16.13.225 – 172.16.13.225	172.16.13.225
227	172.16.13.226/32	172.16.13.226 – 172.16.13.226	172.16.13.226
228	172.16.13.227/32	172.16.13.227 – 172.16.13.227	172.16.13.227
229	172.16.13.228/32	172.16.13.228 – 172.16.13.228	172.16.13.228
230	172.16.13.229/32	172.16.13.229 – 172.16.13.229	172.16.13.229
231	172.16.13.230/32	172.16.13.230 – 172.16.13.230	172.16.13.230
232	172.16.13.231/32	172.16.13.231 – 172.16.13.231	172.16.13.231
233	172.16.13.232/32	172.16.13.232 – 172.16.13.232	172.16.13.232
234	172.16.13.233/32	172.16.13.233 – 172.16.13.233	172.16.13.233
235	172.16.13.234/32	172.16.13.234 – 172.16.13.234	172.16.13.234
236	172.16.13.235/32	172.16.13.235 – 172.16.13.235	172.16.13.235
237	172.16.13.236/32	172.16.13.236 – 172.16.13.236	172.16.13.236
238	172.16.13.237/32	172.16.13.237 – 172.16.13.237	172.16.13.237
239	172.16.13.238/32	172.16.13.238 – 172.16.13.238	172.16.13.238
240	172.16.13.239/32	172.16.13.239 – 172.16.13.239	172.16.13.239
241	172.16.13.240/32	172.16.13.240 – 172.16.13.240	172.16.13.240
242	172.16.13.241/32	172.16.13.241 – 172.16.13.241	172.16.13.241
243	172.16.13.242/32	172.16.13.242 – 172.16.13.242	172.16.13.242
244	172.16.13.243/32	172.16.13.243 – 172.16.13.243	172.16.13.243
245	172.16.13.244/32	172.16.13.244 – 172.16.13.244	172.16.13.244
246	172.16.13.245/32	172.16.13.245 – 172.16.13.245	172.16.13.245
247	172.16.13.246/32	172.16.13.246 – 172.16.13.246	172.16.13.246
248	172.16.13.247/32	172.16.13.247 – 172.16.13.247	172.16.13.247
249	172.16.13.248/32	172.16.13.248 – 172.16.13.248	172.16.13.248
250	172.16.13.249/32	172.16.13.249 – 172.16.13.249	172.16.13.249
251	172.16.13.250/32	172.16.13.250 – 172.16.13.250	172.16.13.250
252	172.16.13.251/32	172.16.13.251 – 172.16.13.251	172.16.13.251
253	172.16.13.252/32	172.16.13.252 – 172.16.13.252	172.16.13.252
254	172.16.13.253/32	172.16.13.253 – 172.16.13.253	172.16.13.253
255	172.16.13.254/32	172.16.13.254 – 172.16.13.254	172.16.13.254
256	172.16.13.255/32	172.16.13.255 – 172.16.13.255	172.16.13.255

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 →