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)10.0.174.0/23

network10.0.174.0/23

broadcast10.0.175.255

first host10.0.174.1

last host10.0.175.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.174.0/23

address00001010.00000000.10101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.10101110.00000000

broadcast00001010.00000000.10101111.11111111

green = network part, grey = host part

hex0x0a00ae00

decimal167816704

reverse dns0.174.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:ae00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.0.174.0/32	10.0.174.0 – 10.0.174.0	10.0.174.0
2	10.0.174.1/32	10.0.174.1 – 10.0.174.1	10.0.174.1
3	10.0.174.2/32	10.0.174.2 – 10.0.174.2	10.0.174.2
4	10.0.174.3/32	10.0.174.3 – 10.0.174.3	10.0.174.3
5	10.0.174.4/32	10.0.174.4 – 10.0.174.4	10.0.174.4
6	10.0.174.5/32	10.0.174.5 – 10.0.174.5	10.0.174.5
7	10.0.174.6/32	10.0.174.6 – 10.0.174.6	10.0.174.6
8	10.0.174.7/32	10.0.174.7 – 10.0.174.7	10.0.174.7
9	10.0.174.8/32	10.0.174.8 – 10.0.174.8	10.0.174.8
10	10.0.174.9/32	10.0.174.9 – 10.0.174.9	10.0.174.9
11	10.0.174.10/32	10.0.174.10 – 10.0.174.10	10.0.174.10
12	10.0.174.11/32	10.0.174.11 – 10.0.174.11	10.0.174.11
13	10.0.174.12/32	10.0.174.12 – 10.0.174.12	10.0.174.12
14	10.0.174.13/32	10.0.174.13 – 10.0.174.13	10.0.174.13
15	10.0.174.14/32	10.0.174.14 – 10.0.174.14	10.0.174.14
16	10.0.174.15/32	10.0.174.15 – 10.0.174.15	10.0.174.15
17	10.0.174.16/32	10.0.174.16 – 10.0.174.16	10.0.174.16
18	10.0.174.17/32	10.0.174.17 – 10.0.174.17	10.0.174.17
19	10.0.174.18/32	10.0.174.18 – 10.0.174.18	10.0.174.18
20	10.0.174.19/32	10.0.174.19 – 10.0.174.19	10.0.174.19
21	10.0.174.20/32	10.0.174.20 – 10.0.174.20	10.0.174.20
22	10.0.174.21/32	10.0.174.21 – 10.0.174.21	10.0.174.21
23	10.0.174.22/32	10.0.174.22 – 10.0.174.22	10.0.174.22
24	10.0.174.23/32	10.0.174.23 – 10.0.174.23	10.0.174.23
25	10.0.174.24/32	10.0.174.24 – 10.0.174.24	10.0.174.24
26	10.0.174.25/32	10.0.174.25 – 10.0.174.25	10.0.174.25
27	10.0.174.26/32	10.0.174.26 – 10.0.174.26	10.0.174.26
28	10.0.174.27/32	10.0.174.27 – 10.0.174.27	10.0.174.27
29	10.0.174.28/32	10.0.174.28 – 10.0.174.28	10.0.174.28
30	10.0.174.29/32	10.0.174.29 – 10.0.174.29	10.0.174.29
31	10.0.174.30/32	10.0.174.30 – 10.0.174.30	10.0.174.30
32	10.0.174.31/32	10.0.174.31 – 10.0.174.31	10.0.174.31
33	10.0.174.32/32	10.0.174.32 – 10.0.174.32	10.0.174.32
34	10.0.174.33/32	10.0.174.33 – 10.0.174.33	10.0.174.33
35	10.0.174.34/32	10.0.174.34 – 10.0.174.34	10.0.174.34
36	10.0.174.35/32	10.0.174.35 – 10.0.174.35	10.0.174.35
37	10.0.174.36/32	10.0.174.36 – 10.0.174.36	10.0.174.36
38	10.0.174.37/32	10.0.174.37 – 10.0.174.37	10.0.174.37
39	10.0.174.38/32	10.0.174.38 – 10.0.174.38	10.0.174.38
40	10.0.174.39/32	10.0.174.39 – 10.0.174.39	10.0.174.39
41	10.0.174.40/32	10.0.174.40 – 10.0.174.40	10.0.174.40
42	10.0.174.41/32	10.0.174.41 – 10.0.174.41	10.0.174.41
43	10.0.174.42/32	10.0.174.42 – 10.0.174.42	10.0.174.42
44	10.0.174.43/32	10.0.174.43 – 10.0.174.43	10.0.174.43
45	10.0.174.44/32	10.0.174.44 – 10.0.174.44	10.0.174.44
46	10.0.174.45/32	10.0.174.45 – 10.0.174.45	10.0.174.45
47	10.0.174.46/32	10.0.174.46 – 10.0.174.46	10.0.174.46
48	10.0.174.47/32	10.0.174.47 – 10.0.174.47	10.0.174.47
49	10.0.174.48/32	10.0.174.48 – 10.0.174.48	10.0.174.48
50	10.0.174.49/32	10.0.174.49 – 10.0.174.49	10.0.174.49
51	10.0.174.50/32	10.0.174.50 – 10.0.174.50	10.0.174.50
52	10.0.174.51/32	10.0.174.51 – 10.0.174.51	10.0.174.51
53	10.0.174.52/32	10.0.174.52 – 10.0.174.52	10.0.174.52
54	10.0.174.53/32	10.0.174.53 – 10.0.174.53	10.0.174.53
55	10.0.174.54/32	10.0.174.54 – 10.0.174.54	10.0.174.54
56	10.0.174.55/32	10.0.174.55 – 10.0.174.55	10.0.174.55
57	10.0.174.56/32	10.0.174.56 – 10.0.174.56	10.0.174.56
58	10.0.174.57/32	10.0.174.57 – 10.0.174.57	10.0.174.57
59	10.0.174.58/32	10.0.174.58 – 10.0.174.58	10.0.174.58
60	10.0.174.59/32	10.0.174.59 – 10.0.174.59	10.0.174.59
61	10.0.174.60/32	10.0.174.60 – 10.0.174.60	10.0.174.60
62	10.0.174.61/32	10.0.174.61 – 10.0.174.61	10.0.174.61
63	10.0.174.62/32	10.0.174.62 – 10.0.174.62	10.0.174.62
64	10.0.174.63/32	10.0.174.63 – 10.0.174.63	10.0.174.63
65	10.0.174.64/32	10.0.174.64 – 10.0.174.64	10.0.174.64
66	10.0.174.65/32	10.0.174.65 – 10.0.174.65	10.0.174.65
67	10.0.174.66/32	10.0.174.66 – 10.0.174.66	10.0.174.66
68	10.0.174.67/32	10.0.174.67 – 10.0.174.67	10.0.174.67
69	10.0.174.68/32	10.0.174.68 – 10.0.174.68	10.0.174.68
70	10.0.174.69/32	10.0.174.69 – 10.0.174.69	10.0.174.69
71	10.0.174.70/32	10.0.174.70 – 10.0.174.70	10.0.174.70
72	10.0.174.71/32	10.0.174.71 – 10.0.174.71	10.0.174.71
73	10.0.174.72/32	10.0.174.72 – 10.0.174.72	10.0.174.72
74	10.0.174.73/32	10.0.174.73 – 10.0.174.73	10.0.174.73
75	10.0.174.74/32	10.0.174.74 – 10.0.174.74	10.0.174.74
76	10.0.174.75/32	10.0.174.75 – 10.0.174.75	10.0.174.75
77	10.0.174.76/32	10.0.174.76 – 10.0.174.76	10.0.174.76
78	10.0.174.77/32	10.0.174.77 – 10.0.174.77	10.0.174.77
79	10.0.174.78/32	10.0.174.78 – 10.0.174.78	10.0.174.78
80	10.0.174.79/32	10.0.174.79 – 10.0.174.79	10.0.174.79
81	10.0.174.80/32	10.0.174.80 – 10.0.174.80	10.0.174.80
82	10.0.174.81/32	10.0.174.81 – 10.0.174.81	10.0.174.81
83	10.0.174.82/32	10.0.174.82 – 10.0.174.82	10.0.174.82
84	10.0.174.83/32	10.0.174.83 – 10.0.174.83	10.0.174.83
85	10.0.174.84/32	10.0.174.84 – 10.0.174.84	10.0.174.84
86	10.0.174.85/32	10.0.174.85 – 10.0.174.85	10.0.174.85
87	10.0.174.86/32	10.0.174.86 – 10.0.174.86	10.0.174.86
88	10.0.174.87/32	10.0.174.87 – 10.0.174.87	10.0.174.87
89	10.0.174.88/32	10.0.174.88 – 10.0.174.88	10.0.174.88
90	10.0.174.89/32	10.0.174.89 – 10.0.174.89	10.0.174.89
91	10.0.174.90/32	10.0.174.90 – 10.0.174.90	10.0.174.90
92	10.0.174.91/32	10.0.174.91 – 10.0.174.91	10.0.174.91
93	10.0.174.92/32	10.0.174.92 – 10.0.174.92	10.0.174.92
94	10.0.174.93/32	10.0.174.93 – 10.0.174.93	10.0.174.93
95	10.0.174.94/32	10.0.174.94 – 10.0.174.94	10.0.174.94
96	10.0.174.95/32	10.0.174.95 – 10.0.174.95	10.0.174.95
97	10.0.174.96/32	10.0.174.96 – 10.0.174.96	10.0.174.96
98	10.0.174.97/32	10.0.174.97 – 10.0.174.97	10.0.174.97
99	10.0.174.98/32	10.0.174.98 – 10.0.174.98	10.0.174.98
100	10.0.174.99/32	10.0.174.99 – 10.0.174.99	10.0.174.99
101	10.0.174.100/32	10.0.174.100 – 10.0.174.100	10.0.174.100
102	10.0.174.101/32	10.0.174.101 – 10.0.174.101	10.0.174.101
103	10.0.174.102/32	10.0.174.102 – 10.0.174.102	10.0.174.102
104	10.0.174.103/32	10.0.174.103 – 10.0.174.103	10.0.174.103
105	10.0.174.104/32	10.0.174.104 – 10.0.174.104	10.0.174.104
106	10.0.174.105/32	10.0.174.105 – 10.0.174.105	10.0.174.105
107	10.0.174.106/32	10.0.174.106 – 10.0.174.106	10.0.174.106
108	10.0.174.107/32	10.0.174.107 – 10.0.174.107	10.0.174.107
109	10.0.174.108/32	10.0.174.108 – 10.0.174.108	10.0.174.108
110	10.0.174.109/32	10.0.174.109 – 10.0.174.109	10.0.174.109
111	10.0.174.110/32	10.0.174.110 – 10.0.174.110	10.0.174.110
112	10.0.174.111/32	10.0.174.111 – 10.0.174.111	10.0.174.111
113	10.0.174.112/32	10.0.174.112 – 10.0.174.112	10.0.174.112
114	10.0.174.113/32	10.0.174.113 – 10.0.174.113	10.0.174.113
115	10.0.174.114/32	10.0.174.114 – 10.0.174.114	10.0.174.114
116	10.0.174.115/32	10.0.174.115 – 10.0.174.115	10.0.174.115
117	10.0.174.116/32	10.0.174.116 – 10.0.174.116	10.0.174.116
118	10.0.174.117/32	10.0.174.117 – 10.0.174.117	10.0.174.117
119	10.0.174.118/32	10.0.174.118 – 10.0.174.118	10.0.174.118
120	10.0.174.119/32	10.0.174.119 – 10.0.174.119	10.0.174.119
121	10.0.174.120/32	10.0.174.120 – 10.0.174.120	10.0.174.120
122	10.0.174.121/32	10.0.174.121 – 10.0.174.121	10.0.174.121
123	10.0.174.122/32	10.0.174.122 – 10.0.174.122	10.0.174.122
124	10.0.174.123/32	10.0.174.123 – 10.0.174.123	10.0.174.123
125	10.0.174.124/32	10.0.174.124 – 10.0.174.124	10.0.174.124
126	10.0.174.125/32	10.0.174.125 – 10.0.174.125	10.0.174.125
127	10.0.174.126/32	10.0.174.126 – 10.0.174.126	10.0.174.126
128	10.0.174.127/32	10.0.174.127 – 10.0.174.127	10.0.174.127
129	10.0.174.128/32	10.0.174.128 – 10.0.174.128	10.0.174.128
130	10.0.174.129/32	10.0.174.129 – 10.0.174.129	10.0.174.129
131	10.0.174.130/32	10.0.174.130 – 10.0.174.130	10.0.174.130
132	10.0.174.131/32	10.0.174.131 – 10.0.174.131	10.0.174.131
133	10.0.174.132/32	10.0.174.132 – 10.0.174.132	10.0.174.132
134	10.0.174.133/32	10.0.174.133 – 10.0.174.133	10.0.174.133
135	10.0.174.134/32	10.0.174.134 – 10.0.174.134	10.0.174.134
136	10.0.174.135/32	10.0.174.135 – 10.0.174.135	10.0.174.135
137	10.0.174.136/32	10.0.174.136 – 10.0.174.136	10.0.174.136
138	10.0.174.137/32	10.0.174.137 – 10.0.174.137	10.0.174.137
139	10.0.174.138/32	10.0.174.138 – 10.0.174.138	10.0.174.138
140	10.0.174.139/32	10.0.174.139 – 10.0.174.139	10.0.174.139
141	10.0.174.140/32	10.0.174.140 – 10.0.174.140	10.0.174.140
142	10.0.174.141/32	10.0.174.141 – 10.0.174.141	10.0.174.141
143	10.0.174.142/32	10.0.174.142 – 10.0.174.142	10.0.174.142
144	10.0.174.143/32	10.0.174.143 – 10.0.174.143	10.0.174.143
145	10.0.174.144/32	10.0.174.144 – 10.0.174.144	10.0.174.144
146	10.0.174.145/32	10.0.174.145 – 10.0.174.145	10.0.174.145
147	10.0.174.146/32	10.0.174.146 – 10.0.174.146	10.0.174.146
148	10.0.174.147/32	10.0.174.147 – 10.0.174.147	10.0.174.147
149	10.0.174.148/32	10.0.174.148 – 10.0.174.148	10.0.174.148
150	10.0.174.149/32	10.0.174.149 – 10.0.174.149	10.0.174.149
151	10.0.174.150/32	10.0.174.150 – 10.0.174.150	10.0.174.150
152	10.0.174.151/32	10.0.174.151 – 10.0.174.151	10.0.174.151
153	10.0.174.152/32	10.0.174.152 – 10.0.174.152	10.0.174.152
154	10.0.174.153/32	10.0.174.153 – 10.0.174.153	10.0.174.153
155	10.0.174.154/32	10.0.174.154 – 10.0.174.154	10.0.174.154
156	10.0.174.155/32	10.0.174.155 – 10.0.174.155	10.0.174.155
157	10.0.174.156/32	10.0.174.156 – 10.0.174.156	10.0.174.156
158	10.0.174.157/32	10.0.174.157 – 10.0.174.157	10.0.174.157
159	10.0.174.158/32	10.0.174.158 – 10.0.174.158	10.0.174.158
160	10.0.174.159/32	10.0.174.159 – 10.0.174.159	10.0.174.159
161	10.0.174.160/32	10.0.174.160 – 10.0.174.160	10.0.174.160
162	10.0.174.161/32	10.0.174.161 – 10.0.174.161	10.0.174.161
163	10.0.174.162/32	10.0.174.162 – 10.0.174.162	10.0.174.162
164	10.0.174.163/32	10.0.174.163 – 10.0.174.163	10.0.174.163
165	10.0.174.164/32	10.0.174.164 – 10.0.174.164	10.0.174.164
166	10.0.174.165/32	10.0.174.165 – 10.0.174.165	10.0.174.165
167	10.0.174.166/32	10.0.174.166 – 10.0.174.166	10.0.174.166
168	10.0.174.167/32	10.0.174.167 – 10.0.174.167	10.0.174.167
169	10.0.174.168/32	10.0.174.168 – 10.0.174.168	10.0.174.168
170	10.0.174.169/32	10.0.174.169 – 10.0.174.169	10.0.174.169
171	10.0.174.170/32	10.0.174.170 – 10.0.174.170	10.0.174.170
172	10.0.174.171/32	10.0.174.171 – 10.0.174.171	10.0.174.171
173	10.0.174.172/32	10.0.174.172 – 10.0.174.172	10.0.174.172
174	10.0.174.173/32	10.0.174.173 – 10.0.174.173	10.0.174.173
175	10.0.174.174/32	10.0.174.174 – 10.0.174.174	10.0.174.174
176	10.0.174.175/32	10.0.174.175 – 10.0.174.175	10.0.174.175
177	10.0.174.176/32	10.0.174.176 – 10.0.174.176	10.0.174.176
178	10.0.174.177/32	10.0.174.177 – 10.0.174.177	10.0.174.177
179	10.0.174.178/32	10.0.174.178 – 10.0.174.178	10.0.174.178
180	10.0.174.179/32	10.0.174.179 – 10.0.174.179	10.0.174.179
181	10.0.174.180/32	10.0.174.180 – 10.0.174.180	10.0.174.180
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198	10.0.174.197/32	10.0.174.197 – 10.0.174.197	10.0.174.197
199	10.0.174.198/32	10.0.174.198 – 10.0.174.198	10.0.174.198
200	10.0.174.199/32	10.0.174.199 – 10.0.174.199	10.0.174.199
201	10.0.174.200/32	10.0.174.200 – 10.0.174.200	10.0.174.200
202	10.0.174.201/32	10.0.174.201 – 10.0.174.201	10.0.174.201
203	10.0.174.202/32	10.0.174.202 – 10.0.174.202	10.0.174.202
204	10.0.174.203/32	10.0.174.203 – 10.0.174.203	10.0.174.203
205	10.0.174.204/32	10.0.174.204 – 10.0.174.204	10.0.174.204
206	10.0.174.205/32	10.0.174.205 – 10.0.174.205	10.0.174.205
207	10.0.174.206/32	10.0.174.206 – 10.0.174.206	10.0.174.206
208	10.0.174.207/32	10.0.174.207 – 10.0.174.207	10.0.174.207
209	10.0.174.208/32	10.0.174.208 – 10.0.174.208	10.0.174.208
210	10.0.174.209/32	10.0.174.209 – 10.0.174.209	10.0.174.209
211	10.0.174.210/32	10.0.174.210 – 10.0.174.210	10.0.174.210
212	10.0.174.211/32	10.0.174.211 – 10.0.174.211	10.0.174.211
213	10.0.174.212/32	10.0.174.212 – 10.0.174.212	10.0.174.212
214	10.0.174.213/32	10.0.174.213 – 10.0.174.213	10.0.174.213
215	10.0.174.214/32	10.0.174.214 – 10.0.174.214	10.0.174.214
216	10.0.174.215/32	10.0.174.215 – 10.0.174.215	10.0.174.215
217	10.0.174.216/32	10.0.174.216 – 10.0.174.216	10.0.174.216
218	10.0.174.217/32	10.0.174.217 – 10.0.174.217	10.0.174.217
219	10.0.174.218/32	10.0.174.218 – 10.0.174.218	10.0.174.218
220	10.0.174.219/32	10.0.174.219 – 10.0.174.219	10.0.174.219
221	10.0.174.220/32	10.0.174.220 – 10.0.174.220	10.0.174.220
222	10.0.174.221/32	10.0.174.221 – 10.0.174.221	10.0.174.221
223	10.0.174.222/32	10.0.174.222 – 10.0.174.222	10.0.174.222
224	10.0.174.223/32	10.0.174.223 – 10.0.174.223	10.0.174.223
225	10.0.174.224/32	10.0.174.224 – 10.0.174.224	10.0.174.224
226	10.0.174.225/32	10.0.174.225 – 10.0.174.225	10.0.174.225
227	10.0.174.226/32	10.0.174.226 – 10.0.174.226	10.0.174.226
228	10.0.174.227/32	10.0.174.227 – 10.0.174.227	10.0.174.227
229	10.0.174.228/32	10.0.174.228 – 10.0.174.228	10.0.174.228
230	10.0.174.229/32	10.0.174.229 – 10.0.174.229	10.0.174.229
231	10.0.174.230/32	10.0.174.230 – 10.0.174.230	10.0.174.230
232	10.0.174.231/32	10.0.174.231 – 10.0.174.231	10.0.174.231
233	10.0.174.232/32	10.0.174.232 – 10.0.174.232	10.0.174.232
234	10.0.174.233/32	10.0.174.233 – 10.0.174.233	10.0.174.233
235	10.0.174.234/32	10.0.174.234 – 10.0.174.234	10.0.174.234
236	10.0.174.235/32	10.0.174.235 – 10.0.174.235	10.0.174.235
237	10.0.174.236/32	10.0.174.236 – 10.0.174.236	10.0.174.236
238	10.0.174.237/32	10.0.174.237 – 10.0.174.237	10.0.174.237
239	10.0.174.238/32	10.0.174.238 – 10.0.174.238	10.0.174.238
240	10.0.174.239/32	10.0.174.239 – 10.0.174.239	10.0.174.239
241	10.0.174.240/32	10.0.174.240 – 10.0.174.240	10.0.174.240
242	10.0.174.241/32	10.0.174.241 – 10.0.174.241	10.0.174.241
243	10.0.174.242/32	10.0.174.242 – 10.0.174.242	10.0.174.242
244	10.0.174.243/32	10.0.174.243 – 10.0.174.243	10.0.174.243
245	10.0.174.244/32	10.0.174.244 – 10.0.174.244	10.0.174.244
246	10.0.174.245/32	10.0.174.245 – 10.0.174.245	10.0.174.245
247	10.0.174.246/32	10.0.174.246 – 10.0.174.246	10.0.174.246
248	10.0.174.247/32	10.0.174.247 – 10.0.174.247	10.0.174.247
249	10.0.174.248/32	10.0.174.248 – 10.0.174.248	10.0.174.248
250	10.0.174.249/32	10.0.174.249 – 10.0.174.249	10.0.174.249
251	10.0.174.250/32	10.0.174.250 – 10.0.174.250	10.0.174.250
252	10.0.174.251/32	10.0.174.251 – 10.0.174.251	10.0.174.251
253	10.0.174.252/32	10.0.174.252 – 10.0.174.252	10.0.174.252
254	10.0.174.253/32	10.0.174.253 – 10.0.174.253	10.0.174.253
255	10.0.174.254/32	10.0.174.254 – 10.0.174.254	10.0.174.254
256	10.0.174.255/32	10.0.174.255 – 10.0.174.255	10.0.174.255

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 →