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)10.0.198.0/24

network10.0.198.0/24

broadcast10.0.198.255

first host10.0.198.1

last host10.0.198.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.198.0/24

address00001010.00000000.11000110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11000110.00000000

broadcast00001010.00000000.11000110.11111111

green = network part, grey = host part

hex0x0a00c600

decimal167822848

reverse dns0.198.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:c600

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.198.0/32	10.0.198.0 – 10.0.198.0	10.0.198.0
2	10.0.198.1/32	10.0.198.1 – 10.0.198.1	10.0.198.1
3	10.0.198.2/32	10.0.198.2 – 10.0.198.2	10.0.198.2
4	10.0.198.3/32	10.0.198.3 – 10.0.198.3	10.0.198.3
5	10.0.198.4/32	10.0.198.4 – 10.0.198.4	10.0.198.4
6	10.0.198.5/32	10.0.198.5 – 10.0.198.5	10.0.198.5
7	10.0.198.6/32	10.0.198.6 – 10.0.198.6	10.0.198.6
8	10.0.198.7/32	10.0.198.7 – 10.0.198.7	10.0.198.7
9	10.0.198.8/32	10.0.198.8 – 10.0.198.8	10.0.198.8
10	10.0.198.9/32	10.0.198.9 – 10.0.198.9	10.0.198.9
11	10.0.198.10/32	10.0.198.10 – 10.0.198.10	10.0.198.10
12	10.0.198.11/32	10.0.198.11 – 10.0.198.11	10.0.198.11
13	10.0.198.12/32	10.0.198.12 – 10.0.198.12	10.0.198.12
14	10.0.198.13/32	10.0.198.13 – 10.0.198.13	10.0.198.13
15	10.0.198.14/32	10.0.198.14 – 10.0.198.14	10.0.198.14
16	10.0.198.15/32	10.0.198.15 – 10.0.198.15	10.0.198.15
17	10.0.198.16/32	10.0.198.16 – 10.0.198.16	10.0.198.16
18	10.0.198.17/32	10.0.198.17 – 10.0.198.17	10.0.198.17
19	10.0.198.18/32	10.0.198.18 – 10.0.198.18	10.0.198.18
20	10.0.198.19/32	10.0.198.19 – 10.0.198.19	10.0.198.19
21	10.0.198.20/32	10.0.198.20 – 10.0.198.20	10.0.198.20
22	10.0.198.21/32	10.0.198.21 – 10.0.198.21	10.0.198.21
23	10.0.198.22/32	10.0.198.22 – 10.0.198.22	10.0.198.22
24	10.0.198.23/32	10.0.198.23 – 10.0.198.23	10.0.198.23
25	10.0.198.24/32	10.0.198.24 – 10.0.198.24	10.0.198.24
26	10.0.198.25/32	10.0.198.25 – 10.0.198.25	10.0.198.25
27	10.0.198.26/32	10.0.198.26 – 10.0.198.26	10.0.198.26
28	10.0.198.27/32	10.0.198.27 – 10.0.198.27	10.0.198.27
29	10.0.198.28/32	10.0.198.28 – 10.0.198.28	10.0.198.28
30	10.0.198.29/32	10.0.198.29 – 10.0.198.29	10.0.198.29
31	10.0.198.30/32	10.0.198.30 – 10.0.198.30	10.0.198.30
32	10.0.198.31/32	10.0.198.31 – 10.0.198.31	10.0.198.31
33	10.0.198.32/32	10.0.198.32 – 10.0.198.32	10.0.198.32
34	10.0.198.33/32	10.0.198.33 – 10.0.198.33	10.0.198.33
35	10.0.198.34/32	10.0.198.34 – 10.0.198.34	10.0.198.34
36	10.0.198.35/32	10.0.198.35 – 10.0.198.35	10.0.198.35
37	10.0.198.36/32	10.0.198.36 – 10.0.198.36	10.0.198.36
38	10.0.198.37/32	10.0.198.37 – 10.0.198.37	10.0.198.37
39	10.0.198.38/32	10.0.198.38 – 10.0.198.38	10.0.198.38
40	10.0.198.39/32	10.0.198.39 – 10.0.198.39	10.0.198.39
41	10.0.198.40/32	10.0.198.40 – 10.0.198.40	10.0.198.40
42	10.0.198.41/32	10.0.198.41 – 10.0.198.41	10.0.198.41
43	10.0.198.42/32	10.0.198.42 – 10.0.198.42	10.0.198.42
44	10.0.198.43/32	10.0.198.43 – 10.0.198.43	10.0.198.43
45	10.0.198.44/32	10.0.198.44 – 10.0.198.44	10.0.198.44
46	10.0.198.45/32	10.0.198.45 – 10.0.198.45	10.0.198.45
47	10.0.198.46/32	10.0.198.46 – 10.0.198.46	10.0.198.46
48	10.0.198.47/32	10.0.198.47 – 10.0.198.47	10.0.198.47
49	10.0.198.48/32	10.0.198.48 – 10.0.198.48	10.0.198.48
50	10.0.198.49/32	10.0.198.49 – 10.0.198.49	10.0.198.49
51	10.0.198.50/32	10.0.198.50 – 10.0.198.50	10.0.198.50
52	10.0.198.51/32	10.0.198.51 – 10.0.198.51	10.0.198.51
53	10.0.198.52/32	10.0.198.52 – 10.0.198.52	10.0.198.52
54	10.0.198.53/32	10.0.198.53 – 10.0.198.53	10.0.198.53
55	10.0.198.54/32	10.0.198.54 – 10.0.198.54	10.0.198.54
56	10.0.198.55/32	10.0.198.55 – 10.0.198.55	10.0.198.55
57	10.0.198.56/32	10.0.198.56 – 10.0.198.56	10.0.198.56
58	10.0.198.57/32	10.0.198.57 – 10.0.198.57	10.0.198.57
59	10.0.198.58/32	10.0.198.58 – 10.0.198.58	10.0.198.58
60	10.0.198.59/32	10.0.198.59 – 10.0.198.59	10.0.198.59
61	10.0.198.60/32	10.0.198.60 – 10.0.198.60	10.0.198.60
62	10.0.198.61/32	10.0.198.61 – 10.0.198.61	10.0.198.61
63	10.0.198.62/32	10.0.198.62 – 10.0.198.62	10.0.198.62
64	10.0.198.63/32	10.0.198.63 – 10.0.198.63	10.0.198.63
65	10.0.198.64/32	10.0.198.64 – 10.0.198.64	10.0.198.64
66	10.0.198.65/32	10.0.198.65 – 10.0.198.65	10.0.198.65
67	10.0.198.66/32	10.0.198.66 – 10.0.198.66	10.0.198.66
68	10.0.198.67/32	10.0.198.67 – 10.0.198.67	10.0.198.67
69	10.0.198.68/32	10.0.198.68 – 10.0.198.68	10.0.198.68
70	10.0.198.69/32	10.0.198.69 – 10.0.198.69	10.0.198.69
71	10.0.198.70/32	10.0.198.70 – 10.0.198.70	10.0.198.70
72	10.0.198.71/32	10.0.198.71 – 10.0.198.71	10.0.198.71
73	10.0.198.72/32	10.0.198.72 – 10.0.198.72	10.0.198.72
74	10.0.198.73/32	10.0.198.73 – 10.0.198.73	10.0.198.73
75	10.0.198.74/32	10.0.198.74 – 10.0.198.74	10.0.198.74
76	10.0.198.75/32	10.0.198.75 – 10.0.198.75	10.0.198.75
77	10.0.198.76/32	10.0.198.76 – 10.0.198.76	10.0.198.76
78	10.0.198.77/32	10.0.198.77 – 10.0.198.77	10.0.198.77
79	10.0.198.78/32	10.0.198.78 – 10.0.198.78	10.0.198.78
80	10.0.198.79/32	10.0.198.79 – 10.0.198.79	10.0.198.79
81	10.0.198.80/32	10.0.198.80 – 10.0.198.80	10.0.198.80
82	10.0.198.81/32	10.0.198.81 – 10.0.198.81	10.0.198.81
83	10.0.198.82/32	10.0.198.82 – 10.0.198.82	10.0.198.82
84	10.0.198.83/32	10.0.198.83 – 10.0.198.83	10.0.198.83
85	10.0.198.84/32	10.0.198.84 – 10.0.198.84	10.0.198.84
86	10.0.198.85/32	10.0.198.85 – 10.0.198.85	10.0.198.85
87	10.0.198.86/32	10.0.198.86 – 10.0.198.86	10.0.198.86
88	10.0.198.87/32	10.0.198.87 – 10.0.198.87	10.0.198.87
89	10.0.198.88/32	10.0.198.88 – 10.0.198.88	10.0.198.88
90	10.0.198.89/32	10.0.198.89 – 10.0.198.89	10.0.198.89
91	10.0.198.90/32	10.0.198.90 – 10.0.198.90	10.0.198.90
92	10.0.198.91/32	10.0.198.91 – 10.0.198.91	10.0.198.91
93	10.0.198.92/32	10.0.198.92 – 10.0.198.92	10.0.198.92
94	10.0.198.93/32	10.0.198.93 – 10.0.198.93	10.0.198.93
95	10.0.198.94/32	10.0.198.94 – 10.0.198.94	10.0.198.94
96	10.0.198.95/32	10.0.198.95 – 10.0.198.95	10.0.198.95
97	10.0.198.96/32	10.0.198.96 – 10.0.198.96	10.0.198.96
98	10.0.198.97/32	10.0.198.97 – 10.0.198.97	10.0.198.97
99	10.0.198.98/32	10.0.198.98 – 10.0.198.98	10.0.198.98
100	10.0.198.99/32	10.0.198.99 – 10.0.198.99	10.0.198.99
101	10.0.198.100/32	10.0.198.100 – 10.0.198.100	10.0.198.100
102	10.0.198.101/32	10.0.198.101 – 10.0.198.101	10.0.198.101
103	10.0.198.102/32	10.0.198.102 – 10.0.198.102	10.0.198.102
104	10.0.198.103/32	10.0.198.103 – 10.0.198.103	10.0.198.103
105	10.0.198.104/32	10.0.198.104 – 10.0.198.104	10.0.198.104
106	10.0.198.105/32	10.0.198.105 – 10.0.198.105	10.0.198.105
107	10.0.198.106/32	10.0.198.106 – 10.0.198.106	10.0.198.106
108	10.0.198.107/32	10.0.198.107 – 10.0.198.107	10.0.198.107
109	10.0.198.108/32	10.0.198.108 – 10.0.198.108	10.0.198.108
110	10.0.198.109/32	10.0.198.109 – 10.0.198.109	10.0.198.109
111	10.0.198.110/32	10.0.198.110 – 10.0.198.110	10.0.198.110
112	10.0.198.111/32	10.0.198.111 – 10.0.198.111	10.0.198.111
113	10.0.198.112/32	10.0.198.112 – 10.0.198.112	10.0.198.112
114	10.0.198.113/32	10.0.198.113 – 10.0.198.113	10.0.198.113
115	10.0.198.114/32	10.0.198.114 – 10.0.198.114	10.0.198.114
116	10.0.198.115/32	10.0.198.115 – 10.0.198.115	10.0.198.115
117	10.0.198.116/32	10.0.198.116 – 10.0.198.116	10.0.198.116
118	10.0.198.117/32	10.0.198.117 – 10.0.198.117	10.0.198.117
119	10.0.198.118/32	10.0.198.118 – 10.0.198.118	10.0.198.118
120	10.0.198.119/32	10.0.198.119 – 10.0.198.119	10.0.198.119
121	10.0.198.120/32	10.0.198.120 – 10.0.198.120	10.0.198.120
122	10.0.198.121/32	10.0.198.121 – 10.0.198.121	10.0.198.121
123	10.0.198.122/32	10.0.198.122 – 10.0.198.122	10.0.198.122
124	10.0.198.123/32	10.0.198.123 – 10.0.198.123	10.0.198.123
125	10.0.198.124/32	10.0.198.124 – 10.0.198.124	10.0.198.124
126	10.0.198.125/32	10.0.198.125 – 10.0.198.125	10.0.198.125
127	10.0.198.126/32	10.0.198.126 – 10.0.198.126	10.0.198.126
128	10.0.198.127/32	10.0.198.127 – 10.0.198.127	10.0.198.127
129	10.0.198.128/32	10.0.198.128 – 10.0.198.128	10.0.198.128
130	10.0.198.129/32	10.0.198.129 – 10.0.198.129	10.0.198.129
131	10.0.198.130/32	10.0.198.130 – 10.0.198.130	10.0.198.130
132	10.0.198.131/32	10.0.198.131 – 10.0.198.131	10.0.198.131
133	10.0.198.132/32	10.0.198.132 – 10.0.198.132	10.0.198.132
134	10.0.198.133/32	10.0.198.133 – 10.0.198.133	10.0.198.133
135	10.0.198.134/32	10.0.198.134 – 10.0.198.134	10.0.198.134
136	10.0.198.135/32	10.0.198.135 – 10.0.198.135	10.0.198.135
137	10.0.198.136/32	10.0.198.136 – 10.0.198.136	10.0.198.136
138	10.0.198.137/32	10.0.198.137 – 10.0.198.137	10.0.198.137
139	10.0.198.138/32	10.0.198.138 – 10.0.198.138	10.0.198.138
140	10.0.198.139/32	10.0.198.139 – 10.0.198.139	10.0.198.139
141	10.0.198.140/32	10.0.198.140 – 10.0.198.140	10.0.198.140
142	10.0.198.141/32	10.0.198.141 – 10.0.198.141	10.0.198.141
143	10.0.198.142/32	10.0.198.142 – 10.0.198.142	10.0.198.142
144	10.0.198.143/32	10.0.198.143 – 10.0.198.143	10.0.198.143
145	10.0.198.144/32	10.0.198.144 – 10.0.198.144	10.0.198.144
146	10.0.198.145/32	10.0.198.145 – 10.0.198.145	10.0.198.145
147	10.0.198.146/32	10.0.198.146 – 10.0.198.146	10.0.198.146
148	10.0.198.147/32	10.0.198.147 – 10.0.198.147	10.0.198.147
149	10.0.198.148/32	10.0.198.148 – 10.0.198.148	10.0.198.148
150	10.0.198.149/32	10.0.198.149 – 10.0.198.149	10.0.198.149
151	10.0.198.150/32	10.0.198.150 – 10.0.198.150	10.0.198.150
152	10.0.198.151/32	10.0.198.151 – 10.0.198.151	10.0.198.151
153	10.0.198.152/32	10.0.198.152 – 10.0.198.152	10.0.198.152
154	10.0.198.153/32	10.0.198.153 – 10.0.198.153	10.0.198.153
155	10.0.198.154/32	10.0.198.154 – 10.0.198.154	10.0.198.154
156	10.0.198.155/32	10.0.198.155 – 10.0.198.155	10.0.198.155
157	10.0.198.156/32	10.0.198.156 – 10.0.198.156	10.0.198.156
158	10.0.198.157/32	10.0.198.157 – 10.0.198.157	10.0.198.157
159	10.0.198.158/32	10.0.198.158 – 10.0.198.158	10.0.198.158
160	10.0.198.159/32	10.0.198.159 – 10.0.198.159	10.0.198.159
161	10.0.198.160/32	10.0.198.160 – 10.0.198.160	10.0.198.160
162	10.0.198.161/32	10.0.198.161 – 10.0.198.161	10.0.198.161
163	10.0.198.162/32	10.0.198.162 – 10.0.198.162	10.0.198.162
164	10.0.198.163/32	10.0.198.163 – 10.0.198.163	10.0.198.163
165	10.0.198.164/32	10.0.198.164 – 10.0.198.164	10.0.198.164
166	10.0.198.165/32	10.0.198.165 – 10.0.198.165	10.0.198.165
167	10.0.198.166/32	10.0.198.166 – 10.0.198.166	10.0.198.166
168	10.0.198.167/32	10.0.198.167 – 10.0.198.167	10.0.198.167
169	10.0.198.168/32	10.0.198.168 – 10.0.198.168	10.0.198.168
170	10.0.198.169/32	10.0.198.169 – 10.0.198.169	10.0.198.169
171	10.0.198.170/32	10.0.198.170 – 10.0.198.170	10.0.198.170
172	10.0.198.171/32	10.0.198.171 – 10.0.198.171	10.0.198.171
173	10.0.198.172/32	10.0.198.172 – 10.0.198.172	10.0.198.172
174	10.0.198.173/32	10.0.198.173 – 10.0.198.173	10.0.198.173
175	10.0.198.174/32	10.0.198.174 – 10.0.198.174	10.0.198.174
176	10.0.198.175/32	10.0.198.175 – 10.0.198.175	10.0.198.175
177	10.0.198.176/32	10.0.198.176 – 10.0.198.176	10.0.198.176
178	10.0.198.177/32	10.0.198.177 – 10.0.198.177	10.0.198.177
179	10.0.198.178/32	10.0.198.178 – 10.0.198.178	10.0.198.178
180	10.0.198.179/32	10.0.198.179 – 10.0.198.179	10.0.198.179
181	10.0.198.180/32	10.0.198.180 – 10.0.198.180	10.0.198.180
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188	10.0.198.187/32	10.0.198.187 – 10.0.198.187	10.0.198.187
189	10.0.198.188/32	10.0.198.188 – 10.0.198.188	10.0.198.188
190	10.0.198.189/32	10.0.198.189 – 10.0.198.189	10.0.198.189
191	10.0.198.190/32	10.0.198.190 – 10.0.198.190	10.0.198.190
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197	10.0.198.196/32	10.0.198.196 – 10.0.198.196	10.0.198.196
198	10.0.198.197/32	10.0.198.197 – 10.0.198.197	10.0.198.197
199	10.0.198.198/32	10.0.198.198 – 10.0.198.198	10.0.198.198
200	10.0.198.199/32	10.0.198.199 – 10.0.198.199	10.0.198.199
201	10.0.198.200/32	10.0.198.200 – 10.0.198.200	10.0.198.200
202	10.0.198.201/32	10.0.198.201 – 10.0.198.201	10.0.198.201
203	10.0.198.202/32	10.0.198.202 – 10.0.198.202	10.0.198.202
204	10.0.198.203/32	10.0.198.203 – 10.0.198.203	10.0.198.203
205	10.0.198.204/32	10.0.198.204 – 10.0.198.204	10.0.198.204
206	10.0.198.205/32	10.0.198.205 – 10.0.198.205	10.0.198.205
207	10.0.198.206/32	10.0.198.206 – 10.0.198.206	10.0.198.206
208	10.0.198.207/32	10.0.198.207 – 10.0.198.207	10.0.198.207
209	10.0.198.208/32	10.0.198.208 – 10.0.198.208	10.0.198.208
210	10.0.198.209/32	10.0.198.209 – 10.0.198.209	10.0.198.209
211	10.0.198.210/32	10.0.198.210 – 10.0.198.210	10.0.198.210
212	10.0.198.211/32	10.0.198.211 – 10.0.198.211	10.0.198.211
213	10.0.198.212/32	10.0.198.212 – 10.0.198.212	10.0.198.212
214	10.0.198.213/32	10.0.198.213 – 10.0.198.213	10.0.198.213
215	10.0.198.214/32	10.0.198.214 – 10.0.198.214	10.0.198.214
216	10.0.198.215/32	10.0.198.215 – 10.0.198.215	10.0.198.215
217	10.0.198.216/32	10.0.198.216 – 10.0.198.216	10.0.198.216
218	10.0.198.217/32	10.0.198.217 – 10.0.198.217	10.0.198.217
219	10.0.198.218/32	10.0.198.218 – 10.0.198.218	10.0.198.218
220	10.0.198.219/32	10.0.198.219 – 10.0.198.219	10.0.198.219
221	10.0.198.220/32	10.0.198.220 – 10.0.198.220	10.0.198.220
222	10.0.198.221/32	10.0.198.221 – 10.0.198.221	10.0.198.221
223	10.0.198.222/32	10.0.198.222 – 10.0.198.222	10.0.198.222
224	10.0.198.223/32	10.0.198.223 – 10.0.198.223	10.0.198.223
225	10.0.198.224/32	10.0.198.224 – 10.0.198.224	10.0.198.224
226	10.0.198.225/32	10.0.198.225 – 10.0.198.225	10.0.198.225
227	10.0.198.226/32	10.0.198.226 – 10.0.198.226	10.0.198.226
228	10.0.198.227/32	10.0.198.227 – 10.0.198.227	10.0.198.227
229	10.0.198.228/32	10.0.198.228 – 10.0.198.228	10.0.198.228
230	10.0.198.229/32	10.0.198.229 – 10.0.198.229	10.0.198.229
231	10.0.198.230/32	10.0.198.230 – 10.0.198.230	10.0.198.230
232	10.0.198.231/32	10.0.198.231 – 10.0.198.231	10.0.198.231
233	10.0.198.232/32	10.0.198.232 – 10.0.198.232	10.0.198.232
234	10.0.198.233/32	10.0.198.233 – 10.0.198.233	10.0.198.233
235	10.0.198.234/32	10.0.198.234 – 10.0.198.234	10.0.198.234
236	10.0.198.235/32	10.0.198.235 – 10.0.198.235	10.0.198.235
237	10.0.198.236/32	10.0.198.236 – 10.0.198.236	10.0.198.236
238	10.0.198.237/32	10.0.198.237 – 10.0.198.237	10.0.198.237
239	10.0.198.238/32	10.0.198.238 – 10.0.198.238	10.0.198.238
240	10.0.198.239/32	10.0.198.239 – 10.0.198.239	10.0.198.239
241	10.0.198.240/32	10.0.198.240 – 10.0.198.240	10.0.198.240
242	10.0.198.241/32	10.0.198.241 – 10.0.198.241	10.0.198.241
243	10.0.198.242/32	10.0.198.242 – 10.0.198.242	10.0.198.242
244	10.0.198.243/32	10.0.198.243 – 10.0.198.243	10.0.198.243
245	10.0.198.244/32	10.0.198.244 – 10.0.198.244	10.0.198.244
246	10.0.198.245/32	10.0.198.245 – 10.0.198.245	10.0.198.245
247	10.0.198.246/32	10.0.198.246 – 10.0.198.246	10.0.198.246
248	10.0.198.247/32	10.0.198.247 – 10.0.198.247	10.0.198.247
249	10.0.198.248/32	10.0.198.248 – 10.0.198.248	10.0.198.248
250	10.0.198.249/32	10.0.198.249 – 10.0.198.249	10.0.198.249
251	10.0.198.250/32	10.0.198.250 – 10.0.198.250	10.0.198.250
252	10.0.198.251/32	10.0.198.251 – 10.0.198.251	10.0.198.251
253	10.0.198.252/32	10.0.198.252 – 10.0.198.252	10.0.198.252
254	10.0.198.253/32	10.0.198.253 – 10.0.198.253	10.0.198.253
255	10.0.198.254/32	10.0.198.254 – 10.0.198.254	10.0.198.254
256	10.0.198.255/32	10.0.198.255 – 10.0.198.255	10.0.198.255

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 →