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)10.78.180.0/24

network10.78.180.0/24

broadcast10.78.180.255

first host10.78.180.1

last host10.78.180.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.180.0/24

address00001010.01001110.10110100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.10110100.00000000

broadcast00001010.01001110.10110100.11111111

green = network part, grey = host part

hex0x0a4eb400

decimal172930048

reverse dns0.180.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:b400

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.78.180.0/32	10.78.180.0 – 10.78.180.0	10.78.180.0
2	10.78.180.1/32	10.78.180.1 – 10.78.180.1	10.78.180.1
3	10.78.180.2/32	10.78.180.2 – 10.78.180.2	10.78.180.2
4	10.78.180.3/32	10.78.180.3 – 10.78.180.3	10.78.180.3
5	10.78.180.4/32	10.78.180.4 – 10.78.180.4	10.78.180.4
6	10.78.180.5/32	10.78.180.5 – 10.78.180.5	10.78.180.5
7	10.78.180.6/32	10.78.180.6 – 10.78.180.6	10.78.180.6
8	10.78.180.7/32	10.78.180.7 – 10.78.180.7	10.78.180.7
9	10.78.180.8/32	10.78.180.8 – 10.78.180.8	10.78.180.8
10	10.78.180.9/32	10.78.180.9 – 10.78.180.9	10.78.180.9
11	10.78.180.10/32	10.78.180.10 – 10.78.180.10	10.78.180.10
12	10.78.180.11/32	10.78.180.11 – 10.78.180.11	10.78.180.11
13	10.78.180.12/32	10.78.180.12 – 10.78.180.12	10.78.180.12
14	10.78.180.13/32	10.78.180.13 – 10.78.180.13	10.78.180.13
15	10.78.180.14/32	10.78.180.14 – 10.78.180.14	10.78.180.14
16	10.78.180.15/32	10.78.180.15 – 10.78.180.15	10.78.180.15
17	10.78.180.16/32	10.78.180.16 – 10.78.180.16	10.78.180.16
18	10.78.180.17/32	10.78.180.17 – 10.78.180.17	10.78.180.17
19	10.78.180.18/32	10.78.180.18 – 10.78.180.18	10.78.180.18
20	10.78.180.19/32	10.78.180.19 – 10.78.180.19	10.78.180.19
21	10.78.180.20/32	10.78.180.20 – 10.78.180.20	10.78.180.20
22	10.78.180.21/32	10.78.180.21 – 10.78.180.21	10.78.180.21
23	10.78.180.22/32	10.78.180.22 – 10.78.180.22	10.78.180.22
24	10.78.180.23/32	10.78.180.23 – 10.78.180.23	10.78.180.23
25	10.78.180.24/32	10.78.180.24 – 10.78.180.24	10.78.180.24
26	10.78.180.25/32	10.78.180.25 – 10.78.180.25	10.78.180.25
27	10.78.180.26/32	10.78.180.26 – 10.78.180.26	10.78.180.26
28	10.78.180.27/32	10.78.180.27 – 10.78.180.27	10.78.180.27
29	10.78.180.28/32	10.78.180.28 – 10.78.180.28	10.78.180.28
30	10.78.180.29/32	10.78.180.29 – 10.78.180.29	10.78.180.29
31	10.78.180.30/32	10.78.180.30 – 10.78.180.30	10.78.180.30
32	10.78.180.31/32	10.78.180.31 – 10.78.180.31	10.78.180.31
33	10.78.180.32/32	10.78.180.32 – 10.78.180.32	10.78.180.32
34	10.78.180.33/32	10.78.180.33 – 10.78.180.33	10.78.180.33
35	10.78.180.34/32	10.78.180.34 – 10.78.180.34	10.78.180.34
36	10.78.180.35/32	10.78.180.35 – 10.78.180.35	10.78.180.35
37	10.78.180.36/32	10.78.180.36 – 10.78.180.36	10.78.180.36
38	10.78.180.37/32	10.78.180.37 – 10.78.180.37	10.78.180.37
39	10.78.180.38/32	10.78.180.38 – 10.78.180.38	10.78.180.38
40	10.78.180.39/32	10.78.180.39 – 10.78.180.39	10.78.180.39
41	10.78.180.40/32	10.78.180.40 – 10.78.180.40	10.78.180.40
42	10.78.180.41/32	10.78.180.41 – 10.78.180.41	10.78.180.41
43	10.78.180.42/32	10.78.180.42 – 10.78.180.42	10.78.180.42
44	10.78.180.43/32	10.78.180.43 – 10.78.180.43	10.78.180.43
45	10.78.180.44/32	10.78.180.44 – 10.78.180.44	10.78.180.44
46	10.78.180.45/32	10.78.180.45 – 10.78.180.45	10.78.180.45
47	10.78.180.46/32	10.78.180.46 – 10.78.180.46	10.78.180.46
48	10.78.180.47/32	10.78.180.47 – 10.78.180.47	10.78.180.47
49	10.78.180.48/32	10.78.180.48 – 10.78.180.48	10.78.180.48
50	10.78.180.49/32	10.78.180.49 – 10.78.180.49	10.78.180.49
51	10.78.180.50/32	10.78.180.50 – 10.78.180.50	10.78.180.50
52	10.78.180.51/32	10.78.180.51 – 10.78.180.51	10.78.180.51
53	10.78.180.52/32	10.78.180.52 – 10.78.180.52	10.78.180.52
54	10.78.180.53/32	10.78.180.53 – 10.78.180.53	10.78.180.53
55	10.78.180.54/32	10.78.180.54 – 10.78.180.54	10.78.180.54
56	10.78.180.55/32	10.78.180.55 – 10.78.180.55	10.78.180.55
57	10.78.180.56/32	10.78.180.56 – 10.78.180.56	10.78.180.56
58	10.78.180.57/32	10.78.180.57 – 10.78.180.57	10.78.180.57
59	10.78.180.58/32	10.78.180.58 – 10.78.180.58	10.78.180.58
60	10.78.180.59/32	10.78.180.59 – 10.78.180.59	10.78.180.59
61	10.78.180.60/32	10.78.180.60 – 10.78.180.60	10.78.180.60
62	10.78.180.61/32	10.78.180.61 – 10.78.180.61	10.78.180.61
63	10.78.180.62/32	10.78.180.62 – 10.78.180.62	10.78.180.62
64	10.78.180.63/32	10.78.180.63 – 10.78.180.63	10.78.180.63
65	10.78.180.64/32	10.78.180.64 – 10.78.180.64	10.78.180.64
66	10.78.180.65/32	10.78.180.65 – 10.78.180.65	10.78.180.65
67	10.78.180.66/32	10.78.180.66 – 10.78.180.66	10.78.180.66
68	10.78.180.67/32	10.78.180.67 – 10.78.180.67	10.78.180.67
69	10.78.180.68/32	10.78.180.68 – 10.78.180.68	10.78.180.68
70	10.78.180.69/32	10.78.180.69 – 10.78.180.69	10.78.180.69
71	10.78.180.70/32	10.78.180.70 – 10.78.180.70	10.78.180.70
72	10.78.180.71/32	10.78.180.71 – 10.78.180.71	10.78.180.71
73	10.78.180.72/32	10.78.180.72 – 10.78.180.72	10.78.180.72
74	10.78.180.73/32	10.78.180.73 – 10.78.180.73	10.78.180.73
75	10.78.180.74/32	10.78.180.74 – 10.78.180.74	10.78.180.74
76	10.78.180.75/32	10.78.180.75 – 10.78.180.75	10.78.180.75
77	10.78.180.76/32	10.78.180.76 – 10.78.180.76	10.78.180.76
78	10.78.180.77/32	10.78.180.77 – 10.78.180.77	10.78.180.77
79	10.78.180.78/32	10.78.180.78 – 10.78.180.78	10.78.180.78
80	10.78.180.79/32	10.78.180.79 – 10.78.180.79	10.78.180.79
81	10.78.180.80/32	10.78.180.80 – 10.78.180.80	10.78.180.80
82	10.78.180.81/32	10.78.180.81 – 10.78.180.81	10.78.180.81
83	10.78.180.82/32	10.78.180.82 – 10.78.180.82	10.78.180.82
84	10.78.180.83/32	10.78.180.83 – 10.78.180.83	10.78.180.83
85	10.78.180.84/32	10.78.180.84 – 10.78.180.84	10.78.180.84
86	10.78.180.85/32	10.78.180.85 – 10.78.180.85	10.78.180.85
87	10.78.180.86/32	10.78.180.86 – 10.78.180.86	10.78.180.86
88	10.78.180.87/32	10.78.180.87 – 10.78.180.87	10.78.180.87
89	10.78.180.88/32	10.78.180.88 – 10.78.180.88	10.78.180.88
90	10.78.180.89/32	10.78.180.89 – 10.78.180.89	10.78.180.89
91	10.78.180.90/32	10.78.180.90 – 10.78.180.90	10.78.180.90
92	10.78.180.91/32	10.78.180.91 – 10.78.180.91	10.78.180.91
93	10.78.180.92/32	10.78.180.92 – 10.78.180.92	10.78.180.92
94	10.78.180.93/32	10.78.180.93 – 10.78.180.93	10.78.180.93
95	10.78.180.94/32	10.78.180.94 – 10.78.180.94	10.78.180.94
96	10.78.180.95/32	10.78.180.95 – 10.78.180.95	10.78.180.95
97	10.78.180.96/32	10.78.180.96 – 10.78.180.96	10.78.180.96
98	10.78.180.97/32	10.78.180.97 – 10.78.180.97	10.78.180.97
99	10.78.180.98/32	10.78.180.98 – 10.78.180.98	10.78.180.98
100	10.78.180.99/32	10.78.180.99 – 10.78.180.99	10.78.180.99
101	10.78.180.100/32	10.78.180.100 – 10.78.180.100	10.78.180.100
102	10.78.180.101/32	10.78.180.101 – 10.78.180.101	10.78.180.101
103	10.78.180.102/32	10.78.180.102 – 10.78.180.102	10.78.180.102
104	10.78.180.103/32	10.78.180.103 – 10.78.180.103	10.78.180.103
105	10.78.180.104/32	10.78.180.104 – 10.78.180.104	10.78.180.104
106	10.78.180.105/32	10.78.180.105 – 10.78.180.105	10.78.180.105
107	10.78.180.106/32	10.78.180.106 – 10.78.180.106	10.78.180.106
108	10.78.180.107/32	10.78.180.107 – 10.78.180.107	10.78.180.107
109	10.78.180.108/32	10.78.180.108 – 10.78.180.108	10.78.180.108
110	10.78.180.109/32	10.78.180.109 – 10.78.180.109	10.78.180.109
111	10.78.180.110/32	10.78.180.110 – 10.78.180.110	10.78.180.110
112	10.78.180.111/32	10.78.180.111 – 10.78.180.111	10.78.180.111
113	10.78.180.112/32	10.78.180.112 – 10.78.180.112	10.78.180.112
114	10.78.180.113/32	10.78.180.113 – 10.78.180.113	10.78.180.113
115	10.78.180.114/32	10.78.180.114 – 10.78.180.114	10.78.180.114
116	10.78.180.115/32	10.78.180.115 – 10.78.180.115	10.78.180.115
117	10.78.180.116/32	10.78.180.116 – 10.78.180.116	10.78.180.116
118	10.78.180.117/32	10.78.180.117 – 10.78.180.117	10.78.180.117
119	10.78.180.118/32	10.78.180.118 – 10.78.180.118	10.78.180.118
120	10.78.180.119/32	10.78.180.119 – 10.78.180.119	10.78.180.119
121	10.78.180.120/32	10.78.180.120 – 10.78.180.120	10.78.180.120
122	10.78.180.121/32	10.78.180.121 – 10.78.180.121	10.78.180.121
123	10.78.180.122/32	10.78.180.122 – 10.78.180.122	10.78.180.122
124	10.78.180.123/32	10.78.180.123 – 10.78.180.123	10.78.180.123
125	10.78.180.124/32	10.78.180.124 – 10.78.180.124	10.78.180.124
126	10.78.180.125/32	10.78.180.125 – 10.78.180.125	10.78.180.125
127	10.78.180.126/32	10.78.180.126 – 10.78.180.126	10.78.180.126
128	10.78.180.127/32	10.78.180.127 – 10.78.180.127	10.78.180.127
129	10.78.180.128/32	10.78.180.128 – 10.78.180.128	10.78.180.128
130	10.78.180.129/32	10.78.180.129 – 10.78.180.129	10.78.180.129
131	10.78.180.130/32	10.78.180.130 – 10.78.180.130	10.78.180.130
132	10.78.180.131/32	10.78.180.131 – 10.78.180.131	10.78.180.131
133	10.78.180.132/32	10.78.180.132 – 10.78.180.132	10.78.180.132
134	10.78.180.133/32	10.78.180.133 – 10.78.180.133	10.78.180.133
135	10.78.180.134/32	10.78.180.134 – 10.78.180.134	10.78.180.134
136	10.78.180.135/32	10.78.180.135 – 10.78.180.135	10.78.180.135
137	10.78.180.136/32	10.78.180.136 – 10.78.180.136	10.78.180.136
138	10.78.180.137/32	10.78.180.137 – 10.78.180.137	10.78.180.137
139	10.78.180.138/32	10.78.180.138 – 10.78.180.138	10.78.180.138
140	10.78.180.139/32	10.78.180.139 – 10.78.180.139	10.78.180.139
141	10.78.180.140/32	10.78.180.140 – 10.78.180.140	10.78.180.140
142	10.78.180.141/32	10.78.180.141 – 10.78.180.141	10.78.180.141
143	10.78.180.142/32	10.78.180.142 – 10.78.180.142	10.78.180.142
144	10.78.180.143/32	10.78.180.143 – 10.78.180.143	10.78.180.143
145	10.78.180.144/32	10.78.180.144 – 10.78.180.144	10.78.180.144
146	10.78.180.145/32	10.78.180.145 – 10.78.180.145	10.78.180.145
147	10.78.180.146/32	10.78.180.146 – 10.78.180.146	10.78.180.146
148	10.78.180.147/32	10.78.180.147 – 10.78.180.147	10.78.180.147
149	10.78.180.148/32	10.78.180.148 – 10.78.180.148	10.78.180.148
150	10.78.180.149/32	10.78.180.149 – 10.78.180.149	10.78.180.149
151	10.78.180.150/32	10.78.180.150 – 10.78.180.150	10.78.180.150
152	10.78.180.151/32	10.78.180.151 – 10.78.180.151	10.78.180.151
153	10.78.180.152/32	10.78.180.152 – 10.78.180.152	10.78.180.152
154	10.78.180.153/32	10.78.180.153 – 10.78.180.153	10.78.180.153
155	10.78.180.154/32	10.78.180.154 – 10.78.180.154	10.78.180.154
156	10.78.180.155/32	10.78.180.155 – 10.78.180.155	10.78.180.155
157	10.78.180.156/32	10.78.180.156 – 10.78.180.156	10.78.180.156
158	10.78.180.157/32	10.78.180.157 – 10.78.180.157	10.78.180.157
159	10.78.180.158/32	10.78.180.158 – 10.78.180.158	10.78.180.158
160	10.78.180.159/32	10.78.180.159 – 10.78.180.159	10.78.180.159
161	10.78.180.160/32	10.78.180.160 – 10.78.180.160	10.78.180.160
162	10.78.180.161/32	10.78.180.161 – 10.78.180.161	10.78.180.161
163	10.78.180.162/32	10.78.180.162 – 10.78.180.162	10.78.180.162
164	10.78.180.163/32	10.78.180.163 – 10.78.180.163	10.78.180.163
165	10.78.180.164/32	10.78.180.164 – 10.78.180.164	10.78.180.164
166	10.78.180.165/32	10.78.180.165 – 10.78.180.165	10.78.180.165
167	10.78.180.166/32	10.78.180.166 – 10.78.180.166	10.78.180.166
168	10.78.180.167/32	10.78.180.167 – 10.78.180.167	10.78.180.167
169	10.78.180.168/32	10.78.180.168 – 10.78.180.168	10.78.180.168
170	10.78.180.169/32	10.78.180.169 – 10.78.180.169	10.78.180.169
171	10.78.180.170/32	10.78.180.170 – 10.78.180.170	10.78.180.170
172	10.78.180.171/32	10.78.180.171 – 10.78.180.171	10.78.180.171
173	10.78.180.172/32	10.78.180.172 – 10.78.180.172	10.78.180.172
174	10.78.180.173/32	10.78.180.173 – 10.78.180.173	10.78.180.173
175	10.78.180.174/32	10.78.180.174 – 10.78.180.174	10.78.180.174
176	10.78.180.175/32	10.78.180.175 – 10.78.180.175	10.78.180.175
177	10.78.180.176/32	10.78.180.176 – 10.78.180.176	10.78.180.176
178	10.78.180.177/32	10.78.180.177 – 10.78.180.177	10.78.180.177
179	10.78.180.178/32	10.78.180.178 – 10.78.180.178	10.78.180.178
180	10.78.180.179/32	10.78.180.179 – 10.78.180.179	10.78.180.179
181	10.78.180.180/32	10.78.180.180 – 10.78.180.180	10.78.180.180
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189	10.78.180.188/32	10.78.180.188 – 10.78.180.188	10.78.180.188
190	10.78.180.189/32	10.78.180.189 – 10.78.180.189	10.78.180.189
191	10.78.180.190/32	10.78.180.190 – 10.78.180.190	10.78.180.190
192	10.78.180.191/32	10.78.180.191 – 10.78.180.191	10.78.180.191
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197	10.78.180.196/32	10.78.180.196 – 10.78.180.196	10.78.180.196
198	10.78.180.197/32	10.78.180.197 – 10.78.180.197	10.78.180.197
199	10.78.180.198/32	10.78.180.198 – 10.78.180.198	10.78.180.198
200	10.78.180.199/32	10.78.180.199 – 10.78.180.199	10.78.180.199
201	10.78.180.200/32	10.78.180.200 – 10.78.180.200	10.78.180.200
202	10.78.180.201/32	10.78.180.201 – 10.78.180.201	10.78.180.201
203	10.78.180.202/32	10.78.180.202 – 10.78.180.202	10.78.180.202
204	10.78.180.203/32	10.78.180.203 – 10.78.180.203	10.78.180.203
205	10.78.180.204/32	10.78.180.204 – 10.78.180.204	10.78.180.204
206	10.78.180.205/32	10.78.180.205 – 10.78.180.205	10.78.180.205
207	10.78.180.206/32	10.78.180.206 – 10.78.180.206	10.78.180.206
208	10.78.180.207/32	10.78.180.207 – 10.78.180.207	10.78.180.207
209	10.78.180.208/32	10.78.180.208 – 10.78.180.208	10.78.180.208
210	10.78.180.209/32	10.78.180.209 – 10.78.180.209	10.78.180.209
211	10.78.180.210/32	10.78.180.210 – 10.78.180.210	10.78.180.210
212	10.78.180.211/32	10.78.180.211 – 10.78.180.211	10.78.180.211
213	10.78.180.212/32	10.78.180.212 – 10.78.180.212	10.78.180.212
214	10.78.180.213/32	10.78.180.213 – 10.78.180.213	10.78.180.213
215	10.78.180.214/32	10.78.180.214 – 10.78.180.214	10.78.180.214
216	10.78.180.215/32	10.78.180.215 – 10.78.180.215	10.78.180.215
217	10.78.180.216/32	10.78.180.216 – 10.78.180.216	10.78.180.216
218	10.78.180.217/32	10.78.180.217 – 10.78.180.217	10.78.180.217
219	10.78.180.218/32	10.78.180.218 – 10.78.180.218	10.78.180.218
220	10.78.180.219/32	10.78.180.219 – 10.78.180.219	10.78.180.219
221	10.78.180.220/32	10.78.180.220 – 10.78.180.220	10.78.180.220
222	10.78.180.221/32	10.78.180.221 – 10.78.180.221	10.78.180.221
223	10.78.180.222/32	10.78.180.222 – 10.78.180.222	10.78.180.222
224	10.78.180.223/32	10.78.180.223 – 10.78.180.223	10.78.180.223
225	10.78.180.224/32	10.78.180.224 – 10.78.180.224	10.78.180.224
226	10.78.180.225/32	10.78.180.225 – 10.78.180.225	10.78.180.225
227	10.78.180.226/32	10.78.180.226 – 10.78.180.226	10.78.180.226
228	10.78.180.227/32	10.78.180.227 – 10.78.180.227	10.78.180.227
229	10.78.180.228/32	10.78.180.228 – 10.78.180.228	10.78.180.228
230	10.78.180.229/32	10.78.180.229 – 10.78.180.229	10.78.180.229
231	10.78.180.230/32	10.78.180.230 – 10.78.180.230	10.78.180.230
232	10.78.180.231/32	10.78.180.231 – 10.78.180.231	10.78.180.231
233	10.78.180.232/32	10.78.180.232 – 10.78.180.232	10.78.180.232
234	10.78.180.233/32	10.78.180.233 – 10.78.180.233	10.78.180.233
235	10.78.180.234/32	10.78.180.234 – 10.78.180.234	10.78.180.234
236	10.78.180.235/32	10.78.180.235 – 10.78.180.235	10.78.180.235
237	10.78.180.236/32	10.78.180.236 – 10.78.180.236	10.78.180.236
238	10.78.180.237/32	10.78.180.237 – 10.78.180.237	10.78.180.237
239	10.78.180.238/32	10.78.180.238 – 10.78.180.238	10.78.180.238
240	10.78.180.239/32	10.78.180.239 – 10.78.180.239	10.78.180.239
241	10.78.180.240/32	10.78.180.240 – 10.78.180.240	10.78.180.240
242	10.78.180.241/32	10.78.180.241 – 10.78.180.241	10.78.180.241
243	10.78.180.242/32	10.78.180.242 – 10.78.180.242	10.78.180.242
244	10.78.180.243/32	10.78.180.243 – 10.78.180.243	10.78.180.243
245	10.78.180.244/32	10.78.180.244 – 10.78.180.244	10.78.180.244
246	10.78.180.245/32	10.78.180.245 – 10.78.180.245	10.78.180.245
247	10.78.180.246/32	10.78.180.246 – 10.78.180.246	10.78.180.246
248	10.78.180.247/32	10.78.180.247 – 10.78.180.247	10.78.180.247
249	10.78.180.248/32	10.78.180.248 – 10.78.180.248	10.78.180.248
250	10.78.180.249/32	10.78.180.249 – 10.78.180.249	10.78.180.249
251	10.78.180.250/32	10.78.180.250 – 10.78.180.250	10.78.180.250
252	10.78.180.251/32	10.78.180.251 – 10.78.180.251	10.78.180.251
253	10.78.180.252/32	10.78.180.252 – 10.78.180.252	10.78.180.252
254	10.78.180.253/32	10.78.180.253 – 10.78.180.253	10.78.180.253
255	10.78.180.254/32	10.78.180.254 – 10.78.180.254	10.78.180.254
256	10.78.180.255/32	10.78.180.255 – 10.78.180.255	10.78.180.255

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 →