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)10.149.145.0/24

network10.149.145.0/24

broadcast10.149.145.255

first host10.149.145.1

last host10.149.145.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.149.145.0/24

address00001010.10010101.10010001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10010101.10010001.00000000

broadcast00001010.10010101.10010001.11111111

green = network part, grey = host part

hex0x0a959100

decimal177574144

reverse dns0.145.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:9100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.149.145.0/32	10.149.145.0 – 10.149.145.0	10.149.145.0
2	10.149.145.1/32	10.149.145.1 – 10.149.145.1	10.149.145.1
3	10.149.145.2/32	10.149.145.2 – 10.149.145.2	10.149.145.2
4	10.149.145.3/32	10.149.145.3 – 10.149.145.3	10.149.145.3
5	10.149.145.4/32	10.149.145.4 – 10.149.145.4	10.149.145.4
6	10.149.145.5/32	10.149.145.5 – 10.149.145.5	10.149.145.5
7	10.149.145.6/32	10.149.145.6 – 10.149.145.6	10.149.145.6
8	10.149.145.7/32	10.149.145.7 – 10.149.145.7	10.149.145.7
9	10.149.145.8/32	10.149.145.8 – 10.149.145.8	10.149.145.8
10	10.149.145.9/32	10.149.145.9 – 10.149.145.9	10.149.145.9
11	10.149.145.10/32	10.149.145.10 – 10.149.145.10	10.149.145.10
12	10.149.145.11/32	10.149.145.11 – 10.149.145.11	10.149.145.11
13	10.149.145.12/32	10.149.145.12 – 10.149.145.12	10.149.145.12
14	10.149.145.13/32	10.149.145.13 – 10.149.145.13	10.149.145.13
15	10.149.145.14/32	10.149.145.14 – 10.149.145.14	10.149.145.14
16	10.149.145.15/32	10.149.145.15 – 10.149.145.15	10.149.145.15
17	10.149.145.16/32	10.149.145.16 – 10.149.145.16	10.149.145.16
18	10.149.145.17/32	10.149.145.17 – 10.149.145.17	10.149.145.17
19	10.149.145.18/32	10.149.145.18 – 10.149.145.18	10.149.145.18
20	10.149.145.19/32	10.149.145.19 – 10.149.145.19	10.149.145.19
21	10.149.145.20/32	10.149.145.20 – 10.149.145.20	10.149.145.20
22	10.149.145.21/32	10.149.145.21 – 10.149.145.21	10.149.145.21
23	10.149.145.22/32	10.149.145.22 – 10.149.145.22	10.149.145.22
24	10.149.145.23/32	10.149.145.23 – 10.149.145.23	10.149.145.23
25	10.149.145.24/32	10.149.145.24 – 10.149.145.24	10.149.145.24
26	10.149.145.25/32	10.149.145.25 – 10.149.145.25	10.149.145.25
27	10.149.145.26/32	10.149.145.26 – 10.149.145.26	10.149.145.26
28	10.149.145.27/32	10.149.145.27 – 10.149.145.27	10.149.145.27
29	10.149.145.28/32	10.149.145.28 – 10.149.145.28	10.149.145.28
30	10.149.145.29/32	10.149.145.29 – 10.149.145.29	10.149.145.29
31	10.149.145.30/32	10.149.145.30 – 10.149.145.30	10.149.145.30
32	10.149.145.31/32	10.149.145.31 – 10.149.145.31	10.149.145.31
33	10.149.145.32/32	10.149.145.32 – 10.149.145.32	10.149.145.32
34	10.149.145.33/32	10.149.145.33 – 10.149.145.33	10.149.145.33
35	10.149.145.34/32	10.149.145.34 – 10.149.145.34	10.149.145.34
36	10.149.145.35/32	10.149.145.35 – 10.149.145.35	10.149.145.35
37	10.149.145.36/32	10.149.145.36 – 10.149.145.36	10.149.145.36
38	10.149.145.37/32	10.149.145.37 – 10.149.145.37	10.149.145.37
39	10.149.145.38/32	10.149.145.38 – 10.149.145.38	10.149.145.38
40	10.149.145.39/32	10.149.145.39 – 10.149.145.39	10.149.145.39
41	10.149.145.40/32	10.149.145.40 – 10.149.145.40	10.149.145.40
42	10.149.145.41/32	10.149.145.41 – 10.149.145.41	10.149.145.41
43	10.149.145.42/32	10.149.145.42 – 10.149.145.42	10.149.145.42
44	10.149.145.43/32	10.149.145.43 – 10.149.145.43	10.149.145.43
45	10.149.145.44/32	10.149.145.44 – 10.149.145.44	10.149.145.44
46	10.149.145.45/32	10.149.145.45 – 10.149.145.45	10.149.145.45
47	10.149.145.46/32	10.149.145.46 – 10.149.145.46	10.149.145.46
48	10.149.145.47/32	10.149.145.47 – 10.149.145.47	10.149.145.47
49	10.149.145.48/32	10.149.145.48 – 10.149.145.48	10.149.145.48
50	10.149.145.49/32	10.149.145.49 – 10.149.145.49	10.149.145.49
51	10.149.145.50/32	10.149.145.50 – 10.149.145.50	10.149.145.50
52	10.149.145.51/32	10.149.145.51 – 10.149.145.51	10.149.145.51
53	10.149.145.52/32	10.149.145.52 – 10.149.145.52	10.149.145.52
54	10.149.145.53/32	10.149.145.53 – 10.149.145.53	10.149.145.53
55	10.149.145.54/32	10.149.145.54 – 10.149.145.54	10.149.145.54
56	10.149.145.55/32	10.149.145.55 – 10.149.145.55	10.149.145.55
57	10.149.145.56/32	10.149.145.56 – 10.149.145.56	10.149.145.56
58	10.149.145.57/32	10.149.145.57 – 10.149.145.57	10.149.145.57
59	10.149.145.58/32	10.149.145.58 – 10.149.145.58	10.149.145.58
60	10.149.145.59/32	10.149.145.59 – 10.149.145.59	10.149.145.59
61	10.149.145.60/32	10.149.145.60 – 10.149.145.60	10.149.145.60
62	10.149.145.61/32	10.149.145.61 – 10.149.145.61	10.149.145.61
63	10.149.145.62/32	10.149.145.62 – 10.149.145.62	10.149.145.62
64	10.149.145.63/32	10.149.145.63 – 10.149.145.63	10.149.145.63
65	10.149.145.64/32	10.149.145.64 – 10.149.145.64	10.149.145.64
66	10.149.145.65/32	10.149.145.65 – 10.149.145.65	10.149.145.65
67	10.149.145.66/32	10.149.145.66 – 10.149.145.66	10.149.145.66
68	10.149.145.67/32	10.149.145.67 – 10.149.145.67	10.149.145.67
69	10.149.145.68/32	10.149.145.68 – 10.149.145.68	10.149.145.68
70	10.149.145.69/32	10.149.145.69 – 10.149.145.69	10.149.145.69
71	10.149.145.70/32	10.149.145.70 – 10.149.145.70	10.149.145.70
72	10.149.145.71/32	10.149.145.71 – 10.149.145.71	10.149.145.71
73	10.149.145.72/32	10.149.145.72 – 10.149.145.72	10.149.145.72
74	10.149.145.73/32	10.149.145.73 – 10.149.145.73	10.149.145.73
75	10.149.145.74/32	10.149.145.74 – 10.149.145.74	10.149.145.74
76	10.149.145.75/32	10.149.145.75 – 10.149.145.75	10.149.145.75
77	10.149.145.76/32	10.149.145.76 – 10.149.145.76	10.149.145.76
78	10.149.145.77/32	10.149.145.77 – 10.149.145.77	10.149.145.77
79	10.149.145.78/32	10.149.145.78 – 10.149.145.78	10.149.145.78
80	10.149.145.79/32	10.149.145.79 – 10.149.145.79	10.149.145.79
81	10.149.145.80/32	10.149.145.80 – 10.149.145.80	10.149.145.80
82	10.149.145.81/32	10.149.145.81 – 10.149.145.81	10.149.145.81
83	10.149.145.82/32	10.149.145.82 – 10.149.145.82	10.149.145.82
84	10.149.145.83/32	10.149.145.83 – 10.149.145.83	10.149.145.83
85	10.149.145.84/32	10.149.145.84 – 10.149.145.84	10.149.145.84
86	10.149.145.85/32	10.149.145.85 – 10.149.145.85	10.149.145.85
87	10.149.145.86/32	10.149.145.86 – 10.149.145.86	10.149.145.86
88	10.149.145.87/32	10.149.145.87 – 10.149.145.87	10.149.145.87
89	10.149.145.88/32	10.149.145.88 – 10.149.145.88	10.149.145.88
90	10.149.145.89/32	10.149.145.89 – 10.149.145.89	10.149.145.89
91	10.149.145.90/32	10.149.145.90 – 10.149.145.90	10.149.145.90
92	10.149.145.91/32	10.149.145.91 – 10.149.145.91	10.149.145.91
93	10.149.145.92/32	10.149.145.92 – 10.149.145.92	10.149.145.92
94	10.149.145.93/32	10.149.145.93 – 10.149.145.93	10.149.145.93
95	10.149.145.94/32	10.149.145.94 – 10.149.145.94	10.149.145.94
96	10.149.145.95/32	10.149.145.95 – 10.149.145.95	10.149.145.95
97	10.149.145.96/32	10.149.145.96 – 10.149.145.96	10.149.145.96
98	10.149.145.97/32	10.149.145.97 – 10.149.145.97	10.149.145.97
99	10.149.145.98/32	10.149.145.98 – 10.149.145.98	10.149.145.98
100	10.149.145.99/32	10.149.145.99 – 10.149.145.99	10.149.145.99
101	10.149.145.100/32	10.149.145.100 – 10.149.145.100	10.149.145.100
102	10.149.145.101/32	10.149.145.101 – 10.149.145.101	10.149.145.101
103	10.149.145.102/32	10.149.145.102 – 10.149.145.102	10.149.145.102
104	10.149.145.103/32	10.149.145.103 – 10.149.145.103	10.149.145.103
105	10.149.145.104/32	10.149.145.104 – 10.149.145.104	10.149.145.104
106	10.149.145.105/32	10.149.145.105 – 10.149.145.105	10.149.145.105
107	10.149.145.106/32	10.149.145.106 – 10.149.145.106	10.149.145.106
108	10.149.145.107/32	10.149.145.107 – 10.149.145.107	10.149.145.107
109	10.149.145.108/32	10.149.145.108 – 10.149.145.108	10.149.145.108
110	10.149.145.109/32	10.149.145.109 – 10.149.145.109	10.149.145.109
111	10.149.145.110/32	10.149.145.110 – 10.149.145.110	10.149.145.110
112	10.149.145.111/32	10.149.145.111 – 10.149.145.111	10.149.145.111
113	10.149.145.112/32	10.149.145.112 – 10.149.145.112	10.149.145.112
114	10.149.145.113/32	10.149.145.113 – 10.149.145.113	10.149.145.113
115	10.149.145.114/32	10.149.145.114 – 10.149.145.114	10.149.145.114
116	10.149.145.115/32	10.149.145.115 – 10.149.145.115	10.149.145.115
117	10.149.145.116/32	10.149.145.116 – 10.149.145.116	10.149.145.116
118	10.149.145.117/32	10.149.145.117 – 10.149.145.117	10.149.145.117
119	10.149.145.118/32	10.149.145.118 – 10.149.145.118	10.149.145.118
120	10.149.145.119/32	10.149.145.119 – 10.149.145.119	10.149.145.119
121	10.149.145.120/32	10.149.145.120 – 10.149.145.120	10.149.145.120
122	10.149.145.121/32	10.149.145.121 – 10.149.145.121	10.149.145.121
123	10.149.145.122/32	10.149.145.122 – 10.149.145.122	10.149.145.122
124	10.149.145.123/32	10.149.145.123 – 10.149.145.123	10.149.145.123
125	10.149.145.124/32	10.149.145.124 – 10.149.145.124	10.149.145.124
126	10.149.145.125/32	10.149.145.125 – 10.149.145.125	10.149.145.125
127	10.149.145.126/32	10.149.145.126 – 10.149.145.126	10.149.145.126
128	10.149.145.127/32	10.149.145.127 – 10.149.145.127	10.149.145.127
129	10.149.145.128/32	10.149.145.128 – 10.149.145.128	10.149.145.128
130	10.149.145.129/32	10.149.145.129 – 10.149.145.129	10.149.145.129
131	10.149.145.130/32	10.149.145.130 – 10.149.145.130	10.149.145.130
132	10.149.145.131/32	10.149.145.131 – 10.149.145.131	10.149.145.131
133	10.149.145.132/32	10.149.145.132 – 10.149.145.132	10.149.145.132
134	10.149.145.133/32	10.149.145.133 – 10.149.145.133	10.149.145.133
135	10.149.145.134/32	10.149.145.134 – 10.149.145.134	10.149.145.134
136	10.149.145.135/32	10.149.145.135 – 10.149.145.135	10.149.145.135
137	10.149.145.136/32	10.149.145.136 – 10.149.145.136	10.149.145.136
138	10.149.145.137/32	10.149.145.137 – 10.149.145.137	10.149.145.137
139	10.149.145.138/32	10.149.145.138 – 10.149.145.138	10.149.145.138
140	10.149.145.139/32	10.149.145.139 – 10.149.145.139	10.149.145.139
141	10.149.145.140/32	10.149.145.140 – 10.149.145.140	10.149.145.140
142	10.149.145.141/32	10.149.145.141 – 10.149.145.141	10.149.145.141
143	10.149.145.142/32	10.149.145.142 – 10.149.145.142	10.149.145.142
144	10.149.145.143/32	10.149.145.143 – 10.149.145.143	10.149.145.143
145	10.149.145.144/32	10.149.145.144 – 10.149.145.144	10.149.145.144
146	10.149.145.145/32	10.149.145.145 – 10.149.145.145	10.149.145.145
147	10.149.145.146/32	10.149.145.146 – 10.149.145.146	10.149.145.146
148	10.149.145.147/32	10.149.145.147 – 10.149.145.147	10.149.145.147
149	10.149.145.148/32	10.149.145.148 – 10.149.145.148	10.149.145.148
150	10.149.145.149/32	10.149.145.149 – 10.149.145.149	10.149.145.149
151	10.149.145.150/32	10.149.145.150 – 10.149.145.150	10.149.145.150
152	10.149.145.151/32	10.149.145.151 – 10.149.145.151	10.149.145.151
153	10.149.145.152/32	10.149.145.152 – 10.149.145.152	10.149.145.152
154	10.149.145.153/32	10.149.145.153 – 10.149.145.153	10.149.145.153
155	10.149.145.154/32	10.149.145.154 – 10.149.145.154	10.149.145.154
156	10.149.145.155/32	10.149.145.155 – 10.149.145.155	10.149.145.155
157	10.149.145.156/32	10.149.145.156 – 10.149.145.156	10.149.145.156
158	10.149.145.157/32	10.149.145.157 – 10.149.145.157	10.149.145.157
159	10.149.145.158/32	10.149.145.158 – 10.149.145.158	10.149.145.158
160	10.149.145.159/32	10.149.145.159 – 10.149.145.159	10.149.145.159
161	10.149.145.160/32	10.149.145.160 – 10.149.145.160	10.149.145.160
162	10.149.145.161/32	10.149.145.161 – 10.149.145.161	10.149.145.161
163	10.149.145.162/32	10.149.145.162 – 10.149.145.162	10.149.145.162
164	10.149.145.163/32	10.149.145.163 – 10.149.145.163	10.149.145.163
165	10.149.145.164/32	10.149.145.164 – 10.149.145.164	10.149.145.164
166	10.149.145.165/32	10.149.145.165 – 10.149.145.165	10.149.145.165
167	10.149.145.166/32	10.149.145.166 – 10.149.145.166	10.149.145.166
168	10.149.145.167/32	10.149.145.167 – 10.149.145.167	10.149.145.167
169	10.149.145.168/32	10.149.145.168 – 10.149.145.168	10.149.145.168
170	10.149.145.169/32	10.149.145.169 – 10.149.145.169	10.149.145.169
171	10.149.145.170/32	10.149.145.170 – 10.149.145.170	10.149.145.170
172	10.149.145.171/32	10.149.145.171 – 10.149.145.171	10.149.145.171
173	10.149.145.172/32	10.149.145.172 – 10.149.145.172	10.149.145.172
174	10.149.145.173/32	10.149.145.173 – 10.149.145.173	10.149.145.173
175	10.149.145.174/32	10.149.145.174 – 10.149.145.174	10.149.145.174
176	10.149.145.175/32	10.149.145.175 – 10.149.145.175	10.149.145.175
177	10.149.145.176/32	10.149.145.176 – 10.149.145.176	10.149.145.176
178	10.149.145.177/32	10.149.145.177 – 10.149.145.177	10.149.145.177
179	10.149.145.178/32	10.149.145.178 – 10.149.145.178	10.149.145.178
180	10.149.145.179/32	10.149.145.179 – 10.149.145.179	10.149.145.179
181	10.149.145.180/32	10.149.145.180 – 10.149.145.180	10.149.145.180
182	10.149.145.181/32	10.149.145.181 – 10.149.145.181	10.149.145.181
183	10.149.145.182/32	10.149.145.182 – 10.149.145.182	10.149.145.182
184	10.149.145.183/32	10.149.145.183 – 10.149.145.183	10.149.145.183
185	10.149.145.184/32	10.149.145.184 – 10.149.145.184	10.149.145.184
186	10.149.145.185/32	10.149.145.185 – 10.149.145.185	10.149.145.185
187	10.149.145.186/32	10.149.145.186 – 10.149.145.186	10.149.145.186
188	10.149.145.187/32	10.149.145.187 – 10.149.145.187	10.149.145.187
189	10.149.145.188/32	10.149.145.188 – 10.149.145.188	10.149.145.188
190	10.149.145.189/32	10.149.145.189 – 10.149.145.189	10.149.145.189
191	10.149.145.190/32	10.149.145.190 – 10.149.145.190	10.149.145.190
192	10.149.145.191/32	10.149.145.191 – 10.149.145.191	10.149.145.191
193	10.149.145.192/32	10.149.145.192 – 10.149.145.192	10.149.145.192
194	10.149.145.193/32	10.149.145.193 – 10.149.145.193	10.149.145.193
195	10.149.145.194/32	10.149.145.194 – 10.149.145.194	10.149.145.194
196	10.149.145.195/32	10.149.145.195 – 10.149.145.195	10.149.145.195
197	10.149.145.196/32	10.149.145.196 – 10.149.145.196	10.149.145.196
198	10.149.145.197/32	10.149.145.197 – 10.149.145.197	10.149.145.197
199	10.149.145.198/32	10.149.145.198 – 10.149.145.198	10.149.145.198
200	10.149.145.199/32	10.149.145.199 – 10.149.145.199	10.149.145.199
201	10.149.145.200/32	10.149.145.200 – 10.149.145.200	10.149.145.200
202	10.149.145.201/32	10.149.145.201 – 10.149.145.201	10.149.145.201
203	10.149.145.202/32	10.149.145.202 – 10.149.145.202	10.149.145.202
204	10.149.145.203/32	10.149.145.203 – 10.149.145.203	10.149.145.203
205	10.149.145.204/32	10.149.145.204 – 10.149.145.204	10.149.145.204
206	10.149.145.205/32	10.149.145.205 – 10.149.145.205	10.149.145.205
207	10.149.145.206/32	10.149.145.206 – 10.149.145.206	10.149.145.206
208	10.149.145.207/32	10.149.145.207 – 10.149.145.207	10.149.145.207
209	10.149.145.208/32	10.149.145.208 – 10.149.145.208	10.149.145.208
210	10.149.145.209/32	10.149.145.209 – 10.149.145.209	10.149.145.209
211	10.149.145.210/32	10.149.145.210 – 10.149.145.210	10.149.145.210
212	10.149.145.211/32	10.149.145.211 – 10.149.145.211	10.149.145.211
213	10.149.145.212/32	10.149.145.212 – 10.149.145.212	10.149.145.212
214	10.149.145.213/32	10.149.145.213 – 10.149.145.213	10.149.145.213
215	10.149.145.214/32	10.149.145.214 – 10.149.145.214	10.149.145.214
216	10.149.145.215/32	10.149.145.215 – 10.149.145.215	10.149.145.215
217	10.149.145.216/32	10.149.145.216 – 10.149.145.216	10.149.145.216
218	10.149.145.217/32	10.149.145.217 – 10.149.145.217	10.149.145.217
219	10.149.145.218/32	10.149.145.218 – 10.149.145.218	10.149.145.218
220	10.149.145.219/32	10.149.145.219 – 10.149.145.219	10.149.145.219
221	10.149.145.220/32	10.149.145.220 – 10.149.145.220	10.149.145.220
222	10.149.145.221/32	10.149.145.221 – 10.149.145.221	10.149.145.221
223	10.149.145.222/32	10.149.145.222 – 10.149.145.222	10.149.145.222
224	10.149.145.223/32	10.149.145.223 – 10.149.145.223	10.149.145.223
225	10.149.145.224/32	10.149.145.224 – 10.149.145.224	10.149.145.224
226	10.149.145.225/32	10.149.145.225 – 10.149.145.225	10.149.145.225
227	10.149.145.226/32	10.149.145.226 – 10.149.145.226	10.149.145.226
228	10.149.145.227/32	10.149.145.227 – 10.149.145.227	10.149.145.227
229	10.149.145.228/32	10.149.145.228 – 10.149.145.228	10.149.145.228
230	10.149.145.229/32	10.149.145.229 – 10.149.145.229	10.149.145.229
231	10.149.145.230/32	10.149.145.230 – 10.149.145.230	10.149.145.230
232	10.149.145.231/32	10.149.145.231 – 10.149.145.231	10.149.145.231
233	10.149.145.232/32	10.149.145.232 – 10.149.145.232	10.149.145.232
234	10.149.145.233/32	10.149.145.233 – 10.149.145.233	10.149.145.233
235	10.149.145.234/32	10.149.145.234 – 10.149.145.234	10.149.145.234
236	10.149.145.235/32	10.149.145.235 – 10.149.145.235	10.149.145.235
237	10.149.145.236/32	10.149.145.236 – 10.149.145.236	10.149.145.236
238	10.149.145.237/32	10.149.145.237 – 10.149.145.237	10.149.145.237
239	10.149.145.238/32	10.149.145.238 – 10.149.145.238	10.149.145.238
240	10.149.145.239/32	10.149.145.239 – 10.149.145.239	10.149.145.239
241	10.149.145.240/32	10.149.145.240 – 10.149.145.240	10.149.145.240
242	10.149.145.241/32	10.149.145.241 – 10.149.145.241	10.149.145.241
243	10.149.145.242/32	10.149.145.242 – 10.149.145.242	10.149.145.242
244	10.149.145.243/32	10.149.145.243 – 10.149.145.243	10.149.145.243
245	10.149.145.244/32	10.149.145.244 – 10.149.145.244	10.149.145.244
246	10.149.145.245/32	10.149.145.245 – 10.149.145.245	10.149.145.245
247	10.149.145.246/32	10.149.145.246 – 10.149.145.246	10.149.145.246
248	10.149.145.247/32	10.149.145.247 – 10.149.145.247	10.149.145.247
249	10.149.145.248/32	10.149.145.248 – 10.149.145.248	10.149.145.248
250	10.149.145.249/32	10.149.145.249 – 10.149.145.249	10.149.145.249
251	10.149.145.250/32	10.149.145.250 – 10.149.145.250	10.149.145.250
252	10.149.145.251/32	10.149.145.251 – 10.149.145.251	10.149.145.251
253	10.149.145.252/32	10.149.145.252 – 10.149.145.252	10.149.145.252
254	10.149.145.253/32	10.149.145.253 – 10.149.145.253	10.149.145.253
255	10.149.145.254/32	10.149.145.254 – 10.149.145.254	10.149.145.254
256	10.149.145.255/32	10.149.145.255 – 10.149.145.255	10.149.145.255

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 →