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)10.45.36.0/23

network10.45.36.0/23

broadcast10.45.37.255

first host10.45.36.1

last host10.45.37.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.45.36.0/23

address00001010.00101101.00100100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00101101.00100100.00000000

broadcast00001010.00101101.00100101.11111111

green = network part, grey = host part

hex0x0a2d2400

decimal170730496

reverse dns0.36.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:2400

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.45.36.0/32	10.45.36.0 – 10.45.36.0	10.45.36.0
2	10.45.36.1/32	10.45.36.1 – 10.45.36.1	10.45.36.1
3	10.45.36.2/32	10.45.36.2 – 10.45.36.2	10.45.36.2
4	10.45.36.3/32	10.45.36.3 – 10.45.36.3	10.45.36.3
5	10.45.36.4/32	10.45.36.4 – 10.45.36.4	10.45.36.4
6	10.45.36.5/32	10.45.36.5 – 10.45.36.5	10.45.36.5
7	10.45.36.6/32	10.45.36.6 – 10.45.36.6	10.45.36.6
8	10.45.36.7/32	10.45.36.7 – 10.45.36.7	10.45.36.7
9	10.45.36.8/32	10.45.36.8 – 10.45.36.8	10.45.36.8
10	10.45.36.9/32	10.45.36.9 – 10.45.36.9	10.45.36.9
11	10.45.36.10/32	10.45.36.10 – 10.45.36.10	10.45.36.10
12	10.45.36.11/32	10.45.36.11 – 10.45.36.11	10.45.36.11
13	10.45.36.12/32	10.45.36.12 – 10.45.36.12	10.45.36.12
14	10.45.36.13/32	10.45.36.13 – 10.45.36.13	10.45.36.13
15	10.45.36.14/32	10.45.36.14 – 10.45.36.14	10.45.36.14
16	10.45.36.15/32	10.45.36.15 – 10.45.36.15	10.45.36.15
17	10.45.36.16/32	10.45.36.16 – 10.45.36.16	10.45.36.16
18	10.45.36.17/32	10.45.36.17 – 10.45.36.17	10.45.36.17
19	10.45.36.18/32	10.45.36.18 – 10.45.36.18	10.45.36.18
20	10.45.36.19/32	10.45.36.19 – 10.45.36.19	10.45.36.19
21	10.45.36.20/32	10.45.36.20 – 10.45.36.20	10.45.36.20
22	10.45.36.21/32	10.45.36.21 – 10.45.36.21	10.45.36.21
23	10.45.36.22/32	10.45.36.22 – 10.45.36.22	10.45.36.22
24	10.45.36.23/32	10.45.36.23 – 10.45.36.23	10.45.36.23
25	10.45.36.24/32	10.45.36.24 – 10.45.36.24	10.45.36.24
26	10.45.36.25/32	10.45.36.25 – 10.45.36.25	10.45.36.25
27	10.45.36.26/32	10.45.36.26 – 10.45.36.26	10.45.36.26
28	10.45.36.27/32	10.45.36.27 – 10.45.36.27	10.45.36.27
29	10.45.36.28/32	10.45.36.28 – 10.45.36.28	10.45.36.28
30	10.45.36.29/32	10.45.36.29 – 10.45.36.29	10.45.36.29
31	10.45.36.30/32	10.45.36.30 – 10.45.36.30	10.45.36.30
32	10.45.36.31/32	10.45.36.31 – 10.45.36.31	10.45.36.31
33	10.45.36.32/32	10.45.36.32 – 10.45.36.32	10.45.36.32
34	10.45.36.33/32	10.45.36.33 – 10.45.36.33	10.45.36.33
35	10.45.36.34/32	10.45.36.34 – 10.45.36.34	10.45.36.34
36	10.45.36.35/32	10.45.36.35 – 10.45.36.35	10.45.36.35
37	10.45.36.36/32	10.45.36.36 – 10.45.36.36	10.45.36.36
38	10.45.36.37/32	10.45.36.37 – 10.45.36.37	10.45.36.37
39	10.45.36.38/32	10.45.36.38 – 10.45.36.38	10.45.36.38
40	10.45.36.39/32	10.45.36.39 – 10.45.36.39	10.45.36.39
41	10.45.36.40/32	10.45.36.40 – 10.45.36.40	10.45.36.40
42	10.45.36.41/32	10.45.36.41 – 10.45.36.41	10.45.36.41
43	10.45.36.42/32	10.45.36.42 – 10.45.36.42	10.45.36.42
44	10.45.36.43/32	10.45.36.43 – 10.45.36.43	10.45.36.43
45	10.45.36.44/32	10.45.36.44 – 10.45.36.44	10.45.36.44
46	10.45.36.45/32	10.45.36.45 – 10.45.36.45	10.45.36.45
47	10.45.36.46/32	10.45.36.46 – 10.45.36.46	10.45.36.46
48	10.45.36.47/32	10.45.36.47 – 10.45.36.47	10.45.36.47
49	10.45.36.48/32	10.45.36.48 – 10.45.36.48	10.45.36.48
50	10.45.36.49/32	10.45.36.49 – 10.45.36.49	10.45.36.49
51	10.45.36.50/32	10.45.36.50 – 10.45.36.50	10.45.36.50
52	10.45.36.51/32	10.45.36.51 – 10.45.36.51	10.45.36.51
53	10.45.36.52/32	10.45.36.52 – 10.45.36.52	10.45.36.52
54	10.45.36.53/32	10.45.36.53 – 10.45.36.53	10.45.36.53
55	10.45.36.54/32	10.45.36.54 – 10.45.36.54	10.45.36.54
56	10.45.36.55/32	10.45.36.55 – 10.45.36.55	10.45.36.55
57	10.45.36.56/32	10.45.36.56 – 10.45.36.56	10.45.36.56
58	10.45.36.57/32	10.45.36.57 – 10.45.36.57	10.45.36.57
59	10.45.36.58/32	10.45.36.58 – 10.45.36.58	10.45.36.58
60	10.45.36.59/32	10.45.36.59 – 10.45.36.59	10.45.36.59
61	10.45.36.60/32	10.45.36.60 – 10.45.36.60	10.45.36.60
62	10.45.36.61/32	10.45.36.61 – 10.45.36.61	10.45.36.61
63	10.45.36.62/32	10.45.36.62 – 10.45.36.62	10.45.36.62
64	10.45.36.63/32	10.45.36.63 – 10.45.36.63	10.45.36.63
65	10.45.36.64/32	10.45.36.64 – 10.45.36.64	10.45.36.64
66	10.45.36.65/32	10.45.36.65 – 10.45.36.65	10.45.36.65
67	10.45.36.66/32	10.45.36.66 – 10.45.36.66	10.45.36.66
68	10.45.36.67/32	10.45.36.67 – 10.45.36.67	10.45.36.67
69	10.45.36.68/32	10.45.36.68 – 10.45.36.68	10.45.36.68
70	10.45.36.69/32	10.45.36.69 – 10.45.36.69	10.45.36.69
71	10.45.36.70/32	10.45.36.70 – 10.45.36.70	10.45.36.70
72	10.45.36.71/32	10.45.36.71 – 10.45.36.71	10.45.36.71
73	10.45.36.72/32	10.45.36.72 – 10.45.36.72	10.45.36.72
74	10.45.36.73/32	10.45.36.73 – 10.45.36.73	10.45.36.73
75	10.45.36.74/32	10.45.36.74 – 10.45.36.74	10.45.36.74
76	10.45.36.75/32	10.45.36.75 – 10.45.36.75	10.45.36.75
77	10.45.36.76/32	10.45.36.76 – 10.45.36.76	10.45.36.76
78	10.45.36.77/32	10.45.36.77 – 10.45.36.77	10.45.36.77
79	10.45.36.78/32	10.45.36.78 – 10.45.36.78	10.45.36.78
80	10.45.36.79/32	10.45.36.79 – 10.45.36.79	10.45.36.79
81	10.45.36.80/32	10.45.36.80 – 10.45.36.80	10.45.36.80
82	10.45.36.81/32	10.45.36.81 – 10.45.36.81	10.45.36.81
83	10.45.36.82/32	10.45.36.82 – 10.45.36.82	10.45.36.82
84	10.45.36.83/32	10.45.36.83 – 10.45.36.83	10.45.36.83
85	10.45.36.84/32	10.45.36.84 – 10.45.36.84	10.45.36.84
86	10.45.36.85/32	10.45.36.85 – 10.45.36.85	10.45.36.85
87	10.45.36.86/32	10.45.36.86 – 10.45.36.86	10.45.36.86
88	10.45.36.87/32	10.45.36.87 – 10.45.36.87	10.45.36.87
89	10.45.36.88/32	10.45.36.88 – 10.45.36.88	10.45.36.88
90	10.45.36.89/32	10.45.36.89 – 10.45.36.89	10.45.36.89
91	10.45.36.90/32	10.45.36.90 – 10.45.36.90	10.45.36.90
92	10.45.36.91/32	10.45.36.91 – 10.45.36.91	10.45.36.91
93	10.45.36.92/32	10.45.36.92 – 10.45.36.92	10.45.36.92
94	10.45.36.93/32	10.45.36.93 – 10.45.36.93	10.45.36.93
95	10.45.36.94/32	10.45.36.94 – 10.45.36.94	10.45.36.94
96	10.45.36.95/32	10.45.36.95 – 10.45.36.95	10.45.36.95
97	10.45.36.96/32	10.45.36.96 – 10.45.36.96	10.45.36.96
98	10.45.36.97/32	10.45.36.97 – 10.45.36.97	10.45.36.97
99	10.45.36.98/32	10.45.36.98 – 10.45.36.98	10.45.36.98
100	10.45.36.99/32	10.45.36.99 – 10.45.36.99	10.45.36.99
101	10.45.36.100/32	10.45.36.100 – 10.45.36.100	10.45.36.100
102	10.45.36.101/32	10.45.36.101 – 10.45.36.101	10.45.36.101
103	10.45.36.102/32	10.45.36.102 – 10.45.36.102	10.45.36.102
104	10.45.36.103/32	10.45.36.103 – 10.45.36.103	10.45.36.103
105	10.45.36.104/32	10.45.36.104 – 10.45.36.104	10.45.36.104
106	10.45.36.105/32	10.45.36.105 – 10.45.36.105	10.45.36.105
107	10.45.36.106/32	10.45.36.106 – 10.45.36.106	10.45.36.106
108	10.45.36.107/32	10.45.36.107 – 10.45.36.107	10.45.36.107
109	10.45.36.108/32	10.45.36.108 – 10.45.36.108	10.45.36.108
110	10.45.36.109/32	10.45.36.109 – 10.45.36.109	10.45.36.109
111	10.45.36.110/32	10.45.36.110 – 10.45.36.110	10.45.36.110
112	10.45.36.111/32	10.45.36.111 – 10.45.36.111	10.45.36.111
113	10.45.36.112/32	10.45.36.112 – 10.45.36.112	10.45.36.112
114	10.45.36.113/32	10.45.36.113 – 10.45.36.113	10.45.36.113
115	10.45.36.114/32	10.45.36.114 – 10.45.36.114	10.45.36.114
116	10.45.36.115/32	10.45.36.115 – 10.45.36.115	10.45.36.115
117	10.45.36.116/32	10.45.36.116 – 10.45.36.116	10.45.36.116
118	10.45.36.117/32	10.45.36.117 – 10.45.36.117	10.45.36.117
119	10.45.36.118/32	10.45.36.118 – 10.45.36.118	10.45.36.118
120	10.45.36.119/32	10.45.36.119 – 10.45.36.119	10.45.36.119
121	10.45.36.120/32	10.45.36.120 – 10.45.36.120	10.45.36.120
122	10.45.36.121/32	10.45.36.121 – 10.45.36.121	10.45.36.121
123	10.45.36.122/32	10.45.36.122 – 10.45.36.122	10.45.36.122
124	10.45.36.123/32	10.45.36.123 – 10.45.36.123	10.45.36.123
125	10.45.36.124/32	10.45.36.124 – 10.45.36.124	10.45.36.124
126	10.45.36.125/32	10.45.36.125 – 10.45.36.125	10.45.36.125
127	10.45.36.126/32	10.45.36.126 – 10.45.36.126	10.45.36.126
128	10.45.36.127/32	10.45.36.127 – 10.45.36.127	10.45.36.127
129	10.45.36.128/32	10.45.36.128 – 10.45.36.128	10.45.36.128
130	10.45.36.129/32	10.45.36.129 – 10.45.36.129	10.45.36.129
131	10.45.36.130/32	10.45.36.130 – 10.45.36.130	10.45.36.130
132	10.45.36.131/32	10.45.36.131 – 10.45.36.131	10.45.36.131
133	10.45.36.132/32	10.45.36.132 – 10.45.36.132	10.45.36.132
134	10.45.36.133/32	10.45.36.133 – 10.45.36.133	10.45.36.133
135	10.45.36.134/32	10.45.36.134 – 10.45.36.134	10.45.36.134
136	10.45.36.135/32	10.45.36.135 – 10.45.36.135	10.45.36.135
137	10.45.36.136/32	10.45.36.136 – 10.45.36.136	10.45.36.136
138	10.45.36.137/32	10.45.36.137 – 10.45.36.137	10.45.36.137
139	10.45.36.138/32	10.45.36.138 – 10.45.36.138	10.45.36.138
140	10.45.36.139/32	10.45.36.139 – 10.45.36.139	10.45.36.139
141	10.45.36.140/32	10.45.36.140 – 10.45.36.140	10.45.36.140
142	10.45.36.141/32	10.45.36.141 – 10.45.36.141	10.45.36.141
143	10.45.36.142/32	10.45.36.142 – 10.45.36.142	10.45.36.142
144	10.45.36.143/32	10.45.36.143 – 10.45.36.143	10.45.36.143
145	10.45.36.144/32	10.45.36.144 – 10.45.36.144	10.45.36.144
146	10.45.36.145/32	10.45.36.145 – 10.45.36.145	10.45.36.145
147	10.45.36.146/32	10.45.36.146 – 10.45.36.146	10.45.36.146
148	10.45.36.147/32	10.45.36.147 – 10.45.36.147	10.45.36.147
149	10.45.36.148/32	10.45.36.148 – 10.45.36.148	10.45.36.148
150	10.45.36.149/32	10.45.36.149 – 10.45.36.149	10.45.36.149
151	10.45.36.150/32	10.45.36.150 – 10.45.36.150	10.45.36.150
152	10.45.36.151/32	10.45.36.151 – 10.45.36.151	10.45.36.151
153	10.45.36.152/32	10.45.36.152 – 10.45.36.152	10.45.36.152
154	10.45.36.153/32	10.45.36.153 – 10.45.36.153	10.45.36.153
155	10.45.36.154/32	10.45.36.154 – 10.45.36.154	10.45.36.154
156	10.45.36.155/32	10.45.36.155 – 10.45.36.155	10.45.36.155
157	10.45.36.156/32	10.45.36.156 – 10.45.36.156	10.45.36.156
158	10.45.36.157/32	10.45.36.157 – 10.45.36.157	10.45.36.157
159	10.45.36.158/32	10.45.36.158 – 10.45.36.158	10.45.36.158
160	10.45.36.159/32	10.45.36.159 – 10.45.36.159	10.45.36.159
161	10.45.36.160/32	10.45.36.160 – 10.45.36.160	10.45.36.160
162	10.45.36.161/32	10.45.36.161 – 10.45.36.161	10.45.36.161
163	10.45.36.162/32	10.45.36.162 – 10.45.36.162	10.45.36.162
164	10.45.36.163/32	10.45.36.163 – 10.45.36.163	10.45.36.163
165	10.45.36.164/32	10.45.36.164 – 10.45.36.164	10.45.36.164
166	10.45.36.165/32	10.45.36.165 – 10.45.36.165	10.45.36.165
167	10.45.36.166/32	10.45.36.166 – 10.45.36.166	10.45.36.166
168	10.45.36.167/32	10.45.36.167 – 10.45.36.167	10.45.36.167
169	10.45.36.168/32	10.45.36.168 – 10.45.36.168	10.45.36.168
170	10.45.36.169/32	10.45.36.169 – 10.45.36.169	10.45.36.169
171	10.45.36.170/32	10.45.36.170 – 10.45.36.170	10.45.36.170
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177	10.45.36.176/32	10.45.36.176 – 10.45.36.176	10.45.36.176
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179	10.45.36.178/32	10.45.36.178 – 10.45.36.178	10.45.36.178
180	10.45.36.179/32	10.45.36.179 – 10.45.36.179	10.45.36.179
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200	10.45.36.199/32	10.45.36.199 – 10.45.36.199	10.45.36.199
201	10.45.36.200/32	10.45.36.200 – 10.45.36.200	10.45.36.200
202	10.45.36.201/32	10.45.36.201 – 10.45.36.201	10.45.36.201
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207	10.45.36.206/32	10.45.36.206 – 10.45.36.206	10.45.36.206
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210	10.45.36.209/32	10.45.36.209 – 10.45.36.209	10.45.36.209
211	10.45.36.210/32	10.45.36.210 – 10.45.36.210	10.45.36.210
212	10.45.36.211/32	10.45.36.211 – 10.45.36.211	10.45.36.211
213	10.45.36.212/32	10.45.36.212 – 10.45.36.212	10.45.36.212
214	10.45.36.213/32	10.45.36.213 – 10.45.36.213	10.45.36.213
215	10.45.36.214/32	10.45.36.214 – 10.45.36.214	10.45.36.214
216	10.45.36.215/32	10.45.36.215 – 10.45.36.215	10.45.36.215
217	10.45.36.216/32	10.45.36.216 – 10.45.36.216	10.45.36.216
218	10.45.36.217/32	10.45.36.217 – 10.45.36.217	10.45.36.217
219	10.45.36.218/32	10.45.36.218 – 10.45.36.218	10.45.36.218
220	10.45.36.219/32	10.45.36.219 – 10.45.36.219	10.45.36.219
221	10.45.36.220/32	10.45.36.220 – 10.45.36.220	10.45.36.220
222	10.45.36.221/32	10.45.36.221 – 10.45.36.221	10.45.36.221
223	10.45.36.222/32	10.45.36.222 – 10.45.36.222	10.45.36.222
224	10.45.36.223/32	10.45.36.223 – 10.45.36.223	10.45.36.223
225	10.45.36.224/32	10.45.36.224 – 10.45.36.224	10.45.36.224
226	10.45.36.225/32	10.45.36.225 – 10.45.36.225	10.45.36.225
227	10.45.36.226/32	10.45.36.226 – 10.45.36.226	10.45.36.226
228	10.45.36.227/32	10.45.36.227 – 10.45.36.227	10.45.36.227
229	10.45.36.228/32	10.45.36.228 – 10.45.36.228	10.45.36.228
230	10.45.36.229/32	10.45.36.229 – 10.45.36.229	10.45.36.229
231	10.45.36.230/32	10.45.36.230 – 10.45.36.230	10.45.36.230
232	10.45.36.231/32	10.45.36.231 – 10.45.36.231	10.45.36.231
233	10.45.36.232/32	10.45.36.232 – 10.45.36.232	10.45.36.232
234	10.45.36.233/32	10.45.36.233 – 10.45.36.233	10.45.36.233
235	10.45.36.234/32	10.45.36.234 – 10.45.36.234	10.45.36.234
236	10.45.36.235/32	10.45.36.235 – 10.45.36.235	10.45.36.235
237	10.45.36.236/32	10.45.36.236 – 10.45.36.236	10.45.36.236
238	10.45.36.237/32	10.45.36.237 – 10.45.36.237	10.45.36.237
239	10.45.36.238/32	10.45.36.238 – 10.45.36.238	10.45.36.238
240	10.45.36.239/32	10.45.36.239 – 10.45.36.239	10.45.36.239
241	10.45.36.240/32	10.45.36.240 – 10.45.36.240	10.45.36.240
242	10.45.36.241/32	10.45.36.241 – 10.45.36.241	10.45.36.241
243	10.45.36.242/32	10.45.36.242 – 10.45.36.242	10.45.36.242
244	10.45.36.243/32	10.45.36.243 – 10.45.36.243	10.45.36.243
245	10.45.36.244/32	10.45.36.244 – 10.45.36.244	10.45.36.244
246	10.45.36.245/32	10.45.36.245 – 10.45.36.245	10.45.36.245
247	10.45.36.246/32	10.45.36.246 – 10.45.36.246	10.45.36.246
248	10.45.36.247/32	10.45.36.247 – 10.45.36.247	10.45.36.247
249	10.45.36.248/32	10.45.36.248 – 10.45.36.248	10.45.36.248
250	10.45.36.249/32	10.45.36.249 – 10.45.36.249	10.45.36.249
251	10.45.36.250/32	10.45.36.250 – 10.45.36.250	10.45.36.250
252	10.45.36.251/32	10.45.36.251 – 10.45.36.251	10.45.36.251
253	10.45.36.252/32	10.45.36.252 – 10.45.36.252	10.45.36.252
254	10.45.36.253/32	10.45.36.253 – 10.45.36.253	10.45.36.253
255	10.45.36.254/32	10.45.36.254 – 10.45.36.254	10.45.36.254
256	10.45.36.255/32	10.45.36.255 – 10.45.36.255	10.45.36.255

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 →