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)10.3.98.0/23

network10.3.98.0/23

broadcast10.3.99.255

first host10.3.98.1

last host10.3.99.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.98.0/23

address00001010.00000011.01100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.01100010.00000000

broadcast00001010.00000011.01100011.11111111

green = network part, grey = host part

hex0x0a036200

decimal167993856

reverse dns0.98.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:6200

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.98.0/31	10.3.98.0 – 10.3.98.1	10.3.98.1
2	10.3.98.2/31	10.3.98.2 – 10.3.98.3	10.3.98.3
3	10.3.98.4/31	10.3.98.4 – 10.3.98.5	10.3.98.5
4	10.3.98.6/31	10.3.98.6 – 10.3.98.7	10.3.98.7
5	10.3.98.8/31	10.3.98.8 – 10.3.98.9	10.3.98.9
6	10.3.98.10/31	10.3.98.10 – 10.3.98.11	10.3.98.11
7	10.3.98.12/31	10.3.98.12 – 10.3.98.13	10.3.98.13
8	10.3.98.14/31	10.3.98.14 – 10.3.98.15	10.3.98.15
9	10.3.98.16/31	10.3.98.16 – 10.3.98.17	10.3.98.17
10	10.3.98.18/31	10.3.98.18 – 10.3.98.19	10.3.98.19
11	10.3.98.20/31	10.3.98.20 – 10.3.98.21	10.3.98.21
12	10.3.98.22/31	10.3.98.22 – 10.3.98.23	10.3.98.23
13	10.3.98.24/31	10.3.98.24 – 10.3.98.25	10.3.98.25
14	10.3.98.26/31	10.3.98.26 – 10.3.98.27	10.3.98.27
15	10.3.98.28/31	10.3.98.28 – 10.3.98.29	10.3.98.29
16	10.3.98.30/31	10.3.98.30 – 10.3.98.31	10.3.98.31
17	10.3.98.32/31	10.3.98.32 – 10.3.98.33	10.3.98.33
18	10.3.98.34/31	10.3.98.34 – 10.3.98.35	10.3.98.35
19	10.3.98.36/31	10.3.98.36 – 10.3.98.37	10.3.98.37
20	10.3.98.38/31	10.3.98.38 – 10.3.98.39	10.3.98.39
21	10.3.98.40/31	10.3.98.40 – 10.3.98.41	10.3.98.41
22	10.3.98.42/31	10.3.98.42 – 10.3.98.43	10.3.98.43
23	10.3.98.44/31	10.3.98.44 – 10.3.98.45	10.3.98.45
24	10.3.98.46/31	10.3.98.46 – 10.3.98.47	10.3.98.47
25	10.3.98.48/31	10.3.98.48 – 10.3.98.49	10.3.98.49
26	10.3.98.50/31	10.3.98.50 – 10.3.98.51	10.3.98.51
27	10.3.98.52/31	10.3.98.52 – 10.3.98.53	10.3.98.53
28	10.3.98.54/31	10.3.98.54 – 10.3.98.55	10.3.98.55
29	10.3.98.56/31	10.3.98.56 – 10.3.98.57	10.3.98.57
30	10.3.98.58/31	10.3.98.58 – 10.3.98.59	10.3.98.59
31	10.3.98.60/31	10.3.98.60 – 10.3.98.61	10.3.98.61
32	10.3.98.62/31	10.3.98.62 – 10.3.98.63	10.3.98.63
33	10.3.98.64/31	10.3.98.64 – 10.3.98.65	10.3.98.65
34	10.3.98.66/31	10.3.98.66 – 10.3.98.67	10.3.98.67
35	10.3.98.68/31	10.3.98.68 – 10.3.98.69	10.3.98.69
36	10.3.98.70/31	10.3.98.70 – 10.3.98.71	10.3.98.71
37	10.3.98.72/31	10.3.98.72 – 10.3.98.73	10.3.98.73
38	10.3.98.74/31	10.3.98.74 – 10.3.98.75	10.3.98.75
39	10.3.98.76/31	10.3.98.76 – 10.3.98.77	10.3.98.77
40	10.3.98.78/31	10.3.98.78 – 10.3.98.79	10.3.98.79
41	10.3.98.80/31	10.3.98.80 – 10.3.98.81	10.3.98.81
42	10.3.98.82/31	10.3.98.82 – 10.3.98.83	10.3.98.83
43	10.3.98.84/31	10.3.98.84 – 10.3.98.85	10.3.98.85
44	10.3.98.86/31	10.3.98.86 – 10.3.98.87	10.3.98.87
45	10.3.98.88/31	10.3.98.88 – 10.3.98.89	10.3.98.89
46	10.3.98.90/31	10.3.98.90 – 10.3.98.91	10.3.98.91
47	10.3.98.92/31	10.3.98.92 – 10.3.98.93	10.3.98.93
48	10.3.98.94/31	10.3.98.94 – 10.3.98.95	10.3.98.95
49	10.3.98.96/31	10.3.98.96 – 10.3.98.97	10.3.98.97
50	10.3.98.98/31	10.3.98.98 – 10.3.98.99	10.3.98.99
51	10.3.98.100/31	10.3.98.100 – 10.3.98.101	10.3.98.101
52	10.3.98.102/31	10.3.98.102 – 10.3.98.103	10.3.98.103
53	10.3.98.104/31	10.3.98.104 – 10.3.98.105	10.3.98.105
54	10.3.98.106/31	10.3.98.106 – 10.3.98.107	10.3.98.107
55	10.3.98.108/31	10.3.98.108 – 10.3.98.109	10.3.98.109
56	10.3.98.110/31	10.3.98.110 – 10.3.98.111	10.3.98.111
57	10.3.98.112/31	10.3.98.112 – 10.3.98.113	10.3.98.113
58	10.3.98.114/31	10.3.98.114 – 10.3.98.115	10.3.98.115
59	10.3.98.116/31	10.3.98.116 – 10.3.98.117	10.3.98.117
60	10.3.98.118/31	10.3.98.118 – 10.3.98.119	10.3.98.119
61	10.3.98.120/31	10.3.98.120 – 10.3.98.121	10.3.98.121
62	10.3.98.122/31	10.3.98.122 – 10.3.98.123	10.3.98.123
63	10.3.98.124/31	10.3.98.124 – 10.3.98.125	10.3.98.125
64	10.3.98.126/31	10.3.98.126 – 10.3.98.127	10.3.98.127
65	10.3.98.128/31	10.3.98.128 – 10.3.98.129	10.3.98.129
66	10.3.98.130/31	10.3.98.130 – 10.3.98.131	10.3.98.131
67	10.3.98.132/31	10.3.98.132 – 10.3.98.133	10.3.98.133
68	10.3.98.134/31	10.3.98.134 – 10.3.98.135	10.3.98.135
69	10.3.98.136/31	10.3.98.136 – 10.3.98.137	10.3.98.137
70	10.3.98.138/31	10.3.98.138 – 10.3.98.139	10.3.98.139
71	10.3.98.140/31	10.3.98.140 – 10.3.98.141	10.3.98.141
72	10.3.98.142/31	10.3.98.142 – 10.3.98.143	10.3.98.143
73	10.3.98.144/31	10.3.98.144 – 10.3.98.145	10.3.98.145
74	10.3.98.146/31	10.3.98.146 – 10.3.98.147	10.3.98.147
75	10.3.98.148/31	10.3.98.148 – 10.3.98.149	10.3.98.149
76	10.3.98.150/31	10.3.98.150 – 10.3.98.151	10.3.98.151
77	10.3.98.152/31	10.3.98.152 – 10.3.98.153	10.3.98.153
78	10.3.98.154/31	10.3.98.154 – 10.3.98.155	10.3.98.155
79	10.3.98.156/31	10.3.98.156 – 10.3.98.157	10.3.98.157
80	10.3.98.158/31	10.3.98.158 – 10.3.98.159	10.3.98.159
81	10.3.98.160/31	10.3.98.160 – 10.3.98.161	10.3.98.161
82	10.3.98.162/31	10.3.98.162 – 10.3.98.163	10.3.98.163
83	10.3.98.164/31	10.3.98.164 – 10.3.98.165	10.3.98.165
84	10.3.98.166/31	10.3.98.166 – 10.3.98.167	10.3.98.167
85	10.3.98.168/31	10.3.98.168 – 10.3.98.169	10.3.98.169
86	10.3.98.170/31	10.3.98.170 – 10.3.98.171	10.3.98.171
87	10.3.98.172/31	10.3.98.172 – 10.3.98.173	10.3.98.173
88	10.3.98.174/31	10.3.98.174 – 10.3.98.175	10.3.98.175
89	10.3.98.176/31	10.3.98.176 – 10.3.98.177	10.3.98.177
90	10.3.98.178/31	10.3.98.178 – 10.3.98.179	10.3.98.179
91	10.3.98.180/31	10.3.98.180 – 10.3.98.181	10.3.98.181
92	10.3.98.182/31	10.3.98.182 – 10.3.98.183	10.3.98.183
93	10.3.98.184/31	10.3.98.184 – 10.3.98.185	10.3.98.185
94	10.3.98.186/31	10.3.98.186 – 10.3.98.187	10.3.98.187
95	10.3.98.188/31	10.3.98.188 – 10.3.98.189	10.3.98.189
96	10.3.98.190/31	10.3.98.190 – 10.3.98.191	10.3.98.191
97	10.3.98.192/31	10.3.98.192 – 10.3.98.193	10.3.98.193
98	10.3.98.194/31	10.3.98.194 – 10.3.98.195	10.3.98.195
99	10.3.98.196/31	10.3.98.196 – 10.3.98.197	10.3.98.197
100	10.3.98.198/31	10.3.98.198 – 10.3.98.199	10.3.98.199
101	10.3.98.200/31	10.3.98.200 – 10.3.98.201	10.3.98.201
102	10.3.98.202/31	10.3.98.202 – 10.3.98.203	10.3.98.203
103	10.3.98.204/31	10.3.98.204 – 10.3.98.205	10.3.98.205
104	10.3.98.206/31	10.3.98.206 – 10.3.98.207	10.3.98.207
105	10.3.98.208/31	10.3.98.208 – 10.3.98.209	10.3.98.209
106	10.3.98.210/31	10.3.98.210 – 10.3.98.211	10.3.98.211
107	10.3.98.212/31	10.3.98.212 – 10.3.98.213	10.3.98.213
108	10.3.98.214/31	10.3.98.214 – 10.3.98.215	10.3.98.215
109	10.3.98.216/31	10.3.98.216 – 10.3.98.217	10.3.98.217
110	10.3.98.218/31	10.3.98.218 – 10.3.98.219	10.3.98.219
111	10.3.98.220/31	10.3.98.220 – 10.3.98.221	10.3.98.221
112	10.3.98.222/31	10.3.98.222 – 10.3.98.223	10.3.98.223
113	10.3.98.224/31	10.3.98.224 – 10.3.98.225	10.3.98.225
114	10.3.98.226/31	10.3.98.226 – 10.3.98.227	10.3.98.227
115	10.3.98.228/31	10.3.98.228 – 10.3.98.229	10.3.98.229
116	10.3.98.230/31	10.3.98.230 – 10.3.98.231	10.3.98.231
117	10.3.98.232/31	10.3.98.232 – 10.3.98.233	10.3.98.233
118	10.3.98.234/31	10.3.98.234 – 10.3.98.235	10.3.98.235
119	10.3.98.236/31	10.3.98.236 – 10.3.98.237	10.3.98.237
120	10.3.98.238/31	10.3.98.238 – 10.3.98.239	10.3.98.239
121	10.3.98.240/31	10.3.98.240 – 10.3.98.241	10.3.98.241
122	10.3.98.242/31	10.3.98.242 – 10.3.98.243	10.3.98.243
123	10.3.98.244/31	10.3.98.244 – 10.3.98.245	10.3.98.245
124	10.3.98.246/31	10.3.98.246 – 10.3.98.247	10.3.98.247
125	10.3.98.248/31	10.3.98.248 – 10.3.98.249	10.3.98.249
126	10.3.98.250/31	10.3.98.250 – 10.3.98.251	10.3.98.251
127	10.3.98.252/31	10.3.98.252 – 10.3.98.253	10.3.98.253
128	10.3.98.254/31	10.3.98.254 – 10.3.98.255	10.3.98.255
129	10.3.99.0/31	10.3.99.0 – 10.3.99.1	10.3.99.1
130	10.3.99.2/31	10.3.99.2 – 10.3.99.3	10.3.99.3
131	10.3.99.4/31	10.3.99.4 – 10.3.99.5	10.3.99.5
132	10.3.99.6/31	10.3.99.6 – 10.3.99.7	10.3.99.7
133	10.3.99.8/31	10.3.99.8 – 10.3.99.9	10.3.99.9
134	10.3.99.10/31	10.3.99.10 – 10.3.99.11	10.3.99.11
135	10.3.99.12/31	10.3.99.12 – 10.3.99.13	10.3.99.13
136	10.3.99.14/31	10.3.99.14 – 10.3.99.15	10.3.99.15
137	10.3.99.16/31	10.3.99.16 – 10.3.99.17	10.3.99.17
138	10.3.99.18/31	10.3.99.18 – 10.3.99.19	10.3.99.19
139	10.3.99.20/31	10.3.99.20 – 10.3.99.21	10.3.99.21
140	10.3.99.22/31	10.3.99.22 – 10.3.99.23	10.3.99.23
141	10.3.99.24/31	10.3.99.24 – 10.3.99.25	10.3.99.25
142	10.3.99.26/31	10.3.99.26 – 10.3.99.27	10.3.99.27
143	10.3.99.28/31	10.3.99.28 – 10.3.99.29	10.3.99.29
144	10.3.99.30/31	10.3.99.30 – 10.3.99.31	10.3.99.31
145	10.3.99.32/31	10.3.99.32 – 10.3.99.33	10.3.99.33
146	10.3.99.34/31	10.3.99.34 – 10.3.99.35	10.3.99.35
147	10.3.99.36/31	10.3.99.36 – 10.3.99.37	10.3.99.37
148	10.3.99.38/31	10.3.99.38 – 10.3.99.39	10.3.99.39
149	10.3.99.40/31	10.3.99.40 – 10.3.99.41	10.3.99.41
150	10.3.99.42/31	10.3.99.42 – 10.3.99.43	10.3.99.43
151	10.3.99.44/31	10.3.99.44 – 10.3.99.45	10.3.99.45
152	10.3.99.46/31	10.3.99.46 – 10.3.99.47	10.3.99.47
153	10.3.99.48/31	10.3.99.48 – 10.3.99.49	10.3.99.49
154	10.3.99.50/31	10.3.99.50 – 10.3.99.51	10.3.99.51
155	10.3.99.52/31	10.3.99.52 – 10.3.99.53	10.3.99.53
156	10.3.99.54/31	10.3.99.54 – 10.3.99.55	10.3.99.55
157	10.3.99.56/31	10.3.99.56 – 10.3.99.57	10.3.99.57
158	10.3.99.58/31	10.3.99.58 – 10.3.99.59	10.3.99.59
159	10.3.99.60/31	10.3.99.60 – 10.3.99.61	10.3.99.61
160	10.3.99.62/31	10.3.99.62 – 10.3.99.63	10.3.99.63
161	10.3.99.64/31	10.3.99.64 – 10.3.99.65	10.3.99.65
162	10.3.99.66/31	10.3.99.66 – 10.3.99.67	10.3.99.67
163	10.3.99.68/31	10.3.99.68 – 10.3.99.69	10.3.99.69
164	10.3.99.70/31	10.3.99.70 – 10.3.99.71	10.3.99.71
165	10.3.99.72/31	10.3.99.72 – 10.3.99.73	10.3.99.73
166	10.3.99.74/31	10.3.99.74 – 10.3.99.75	10.3.99.75
167	10.3.99.76/31	10.3.99.76 – 10.3.99.77	10.3.99.77
168	10.3.99.78/31	10.3.99.78 – 10.3.99.79	10.3.99.79
169	10.3.99.80/31	10.3.99.80 – 10.3.99.81	10.3.99.81
170	10.3.99.82/31	10.3.99.82 – 10.3.99.83	10.3.99.83
171	10.3.99.84/31	10.3.99.84 – 10.3.99.85	10.3.99.85
172	10.3.99.86/31	10.3.99.86 – 10.3.99.87	10.3.99.87
173	10.3.99.88/31	10.3.99.88 – 10.3.99.89	10.3.99.89
174	10.3.99.90/31	10.3.99.90 – 10.3.99.91	10.3.99.91
175	10.3.99.92/31	10.3.99.92 – 10.3.99.93	10.3.99.93
176	10.3.99.94/31	10.3.99.94 – 10.3.99.95	10.3.99.95
177	10.3.99.96/31	10.3.99.96 – 10.3.99.97	10.3.99.97
178	10.3.99.98/31	10.3.99.98 – 10.3.99.99	10.3.99.99
179	10.3.99.100/31	10.3.99.100 – 10.3.99.101	10.3.99.101
180	10.3.99.102/31	10.3.99.102 – 10.3.99.103	10.3.99.103
181	10.3.99.104/31	10.3.99.104 – 10.3.99.105	10.3.99.105
182	10.3.99.106/31	10.3.99.106 – 10.3.99.107	10.3.99.107
183	10.3.99.108/31	10.3.99.108 – 10.3.99.109	10.3.99.109
184	10.3.99.110/31	10.3.99.110 – 10.3.99.111	10.3.99.111
185	10.3.99.112/31	10.3.99.112 – 10.3.99.113	10.3.99.113
186	10.3.99.114/31	10.3.99.114 – 10.3.99.115	10.3.99.115
187	10.3.99.116/31	10.3.99.116 – 10.3.99.117	10.3.99.117
188	10.3.99.118/31	10.3.99.118 – 10.3.99.119	10.3.99.119
189	10.3.99.120/31	10.3.99.120 – 10.3.99.121	10.3.99.121
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191	10.3.99.124/31	10.3.99.124 – 10.3.99.125	10.3.99.125
192	10.3.99.126/31	10.3.99.126 – 10.3.99.127	10.3.99.127
193	10.3.99.128/31	10.3.99.128 – 10.3.99.129	10.3.99.129
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196	10.3.99.134/31	10.3.99.134 – 10.3.99.135	10.3.99.135
197	10.3.99.136/31	10.3.99.136 – 10.3.99.137	10.3.99.137
198	10.3.99.138/31	10.3.99.138 – 10.3.99.139	10.3.99.139
199	10.3.99.140/31	10.3.99.140 – 10.3.99.141	10.3.99.141
200	10.3.99.142/31	10.3.99.142 – 10.3.99.143	10.3.99.143
201	10.3.99.144/31	10.3.99.144 – 10.3.99.145	10.3.99.145
202	10.3.99.146/31	10.3.99.146 – 10.3.99.147	10.3.99.147
203	10.3.99.148/31	10.3.99.148 – 10.3.99.149	10.3.99.149
204	10.3.99.150/31	10.3.99.150 – 10.3.99.151	10.3.99.151
205	10.3.99.152/31	10.3.99.152 – 10.3.99.153	10.3.99.153
206	10.3.99.154/31	10.3.99.154 – 10.3.99.155	10.3.99.155
207	10.3.99.156/31	10.3.99.156 – 10.3.99.157	10.3.99.157
208	10.3.99.158/31	10.3.99.158 – 10.3.99.159	10.3.99.159
209	10.3.99.160/31	10.3.99.160 – 10.3.99.161	10.3.99.161
210	10.3.99.162/31	10.3.99.162 – 10.3.99.163	10.3.99.163
211	10.3.99.164/31	10.3.99.164 – 10.3.99.165	10.3.99.165
212	10.3.99.166/31	10.3.99.166 – 10.3.99.167	10.3.99.167
213	10.3.99.168/31	10.3.99.168 – 10.3.99.169	10.3.99.169
214	10.3.99.170/31	10.3.99.170 – 10.3.99.171	10.3.99.171
215	10.3.99.172/31	10.3.99.172 – 10.3.99.173	10.3.99.173
216	10.3.99.174/31	10.3.99.174 – 10.3.99.175	10.3.99.175
217	10.3.99.176/31	10.3.99.176 – 10.3.99.177	10.3.99.177
218	10.3.99.178/31	10.3.99.178 – 10.3.99.179	10.3.99.179
219	10.3.99.180/31	10.3.99.180 – 10.3.99.181	10.3.99.181
220	10.3.99.182/31	10.3.99.182 – 10.3.99.183	10.3.99.183
221	10.3.99.184/31	10.3.99.184 – 10.3.99.185	10.3.99.185
222	10.3.99.186/31	10.3.99.186 – 10.3.99.187	10.3.99.187
223	10.3.99.188/31	10.3.99.188 – 10.3.99.189	10.3.99.189
224	10.3.99.190/31	10.3.99.190 – 10.3.99.191	10.3.99.191
225	10.3.99.192/31	10.3.99.192 – 10.3.99.193	10.3.99.193
226	10.3.99.194/31	10.3.99.194 – 10.3.99.195	10.3.99.195
227	10.3.99.196/31	10.3.99.196 – 10.3.99.197	10.3.99.197
228	10.3.99.198/31	10.3.99.198 – 10.3.99.199	10.3.99.199
229	10.3.99.200/31	10.3.99.200 – 10.3.99.201	10.3.99.201
230	10.3.99.202/31	10.3.99.202 – 10.3.99.203	10.3.99.203
231	10.3.99.204/31	10.3.99.204 – 10.3.99.205	10.3.99.205
232	10.3.99.206/31	10.3.99.206 – 10.3.99.207	10.3.99.207
233	10.3.99.208/31	10.3.99.208 – 10.3.99.209	10.3.99.209
234	10.3.99.210/31	10.3.99.210 – 10.3.99.211	10.3.99.211
235	10.3.99.212/31	10.3.99.212 – 10.3.99.213	10.3.99.213
236	10.3.99.214/31	10.3.99.214 – 10.3.99.215	10.3.99.215
237	10.3.99.216/31	10.3.99.216 – 10.3.99.217	10.3.99.217
238	10.3.99.218/31	10.3.99.218 – 10.3.99.219	10.3.99.219
239	10.3.99.220/31	10.3.99.220 – 10.3.99.221	10.3.99.221
240	10.3.99.222/31	10.3.99.222 – 10.3.99.223	10.3.99.223
241	10.3.99.224/31	10.3.99.224 – 10.3.99.225	10.3.99.225
242	10.3.99.226/31	10.3.99.226 – 10.3.99.227	10.3.99.227
243	10.3.99.228/31	10.3.99.228 – 10.3.99.229	10.3.99.229
244	10.3.99.230/31	10.3.99.230 – 10.3.99.231	10.3.99.231
245	10.3.99.232/31	10.3.99.232 – 10.3.99.233	10.3.99.233
246	10.3.99.234/31	10.3.99.234 – 10.3.99.235	10.3.99.235
247	10.3.99.236/31	10.3.99.236 – 10.3.99.237	10.3.99.237
248	10.3.99.238/31	10.3.99.238 – 10.3.99.239	10.3.99.239
249	10.3.99.240/31	10.3.99.240 – 10.3.99.241	10.3.99.241
250	10.3.99.242/31	10.3.99.242 – 10.3.99.243	10.3.99.243
251	10.3.99.244/31	10.3.99.244 – 10.3.99.245	10.3.99.245
252	10.3.99.246/31	10.3.99.246 – 10.3.99.247	10.3.99.247
253	10.3.99.248/31	10.3.99.248 – 10.3.99.249	10.3.99.249
254	10.3.99.250/31	10.3.99.250 – 10.3.99.251	10.3.99.251
255	10.3.99.252/31	10.3.99.252 – 10.3.99.253	10.3.99.253
256	10.3.99.254/31	10.3.99.254 – 10.3.99.255	10.3.99.255

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 /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 →