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)10.55.60.0/22

network10.55.60.0/22

broadcast10.55.63.255

first host10.55.60.1

last host10.55.63.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.55.60.0/22

address00001010.00110111.00111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00110111.00111100.00000000

broadcast00001010.00110111.00111111.11111111

green = network part, grey = host part

hex0x0a373c00

decimal171392000

reverse dns0.60.55.10.in-addr.arpa

ipv4-mapped::ffff:a37:3c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.55.60.0/30	10.55.60.1 – 10.55.60.2	10.55.60.3
2	10.55.60.4/30	10.55.60.5 – 10.55.60.6	10.55.60.7
3	10.55.60.8/30	10.55.60.9 – 10.55.60.10	10.55.60.11
4	10.55.60.12/30	10.55.60.13 – 10.55.60.14	10.55.60.15
5	10.55.60.16/30	10.55.60.17 – 10.55.60.18	10.55.60.19
6	10.55.60.20/30	10.55.60.21 – 10.55.60.22	10.55.60.23
7	10.55.60.24/30	10.55.60.25 – 10.55.60.26	10.55.60.27
8	10.55.60.28/30	10.55.60.29 – 10.55.60.30	10.55.60.31
9	10.55.60.32/30	10.55.60.33 – 10.55.60.34	10.55.60.35
10	10.55.60.36/30	10.55.60.37 – 10.55.60.38	10.55.60.39
11	10.55.60.40/30	10.55.60.41 – 10.55.60.42	10.55.60.43
12	10.55.60.44/30	10.55.60.45 – 10.55.60.46	10.55.60.47
13	10.55.60.48/30	10.55.60.49 – 10.55.60.50	10.55.60.51
14	10.55.60.52/30	10.55.60.53 – 10.55.60.54	10.55.60.55
15	10.55.60.56/30	10.55.60.57 – 10.55.60.58	10.55.60.59
16	10.55.60.60/30	10.55.60.61 – 10.55.60.62	10.55.60.63
17	10.55.60.64/30	10.55.60.65 – 10.55.60.66	10.55.60.67
18	10.55.60.68/30	10.55.60.69 – 10.55.60.70	10.55.60.71
19	10.55.60.72/30	10.55.60.73 – 10.55.60.74	10.55.60.75
20	10.55.60.76/30	10.55.60.77 – 10.55.60.78	10.55.60.79
21	10.55.60.80/30	10.55.60.81 – 10.55.60.82	10.55.60.83
22	10.55.60.84/30	10.55.60.85 – 10.55.60.86	10.55.60.87
23	10.55.60.88/30	10.55.60.89 – 10.55.60.90	10.55.60.91
24	10.55.60.92/30	10.55.60.93 – 10.55.60.94	10.55.60.95
25	10.55.60.96/30	10.55.60.97 – 10.55.60.98	10.55.60.99
26	10.55.60.100/30	10.55.60.101 – 10.55.60.102	10.55.60.103
27	10.55.60.104/30	10.55.60.105 – 10.55.60.106	10.55.60.107
28	10.55.60.108/30	10.55.60.109 – 10.55.60.110	10.55.60.111
29	10.55.60.112/30	10.55.60.113 – 10.55.60.114	10.55.60.115
30	10.55.60.116/30	10.55.60.117 – 10.55.60.118	10.55.60.119
31	10.55.60.120/30	10.55.60.121 – 10.55.60.122	10.55.60.123
32	10.55.60.124/30	10.55.60.125 – 10.55.60.126	10.55.60.127
33	10.55.60.128/30	10.55.60.129 – 10.55.60.130	10.55.60.131
34	10.55.60.132/30	10.55.60.133 – 10.55.60.134	10.55.60.135
35	10.55.60.136/30	10.55.60.137 – 10.55.60.138	10.55.60.139
36	10.55.60.140/30	10.55.60.141 – 10.55.60.142	10.55.60.143
37	10.55.60.144/30	10.55.60.145 – 10.55.60.146	10.55.60.147
38	10.55.60.148/30	10.55.60.149 – 10.55.60.150	10.55.60.151
39	10.55.60.152/30	10.55.60.153 – 10.55.60.154	10.55.60.155
40	10.55.60.156/30	10.55.60.157 – 10.55.60.158	10.55.60.159
41	10.55.60.160/30	10.55.60.161 – 10.55.60.162	10.55.60.163
42	10.55.60.164/30	10.55.60.165 – 10.55.60.166	10.55.60.167
43	10.55.60.168/30	10.55.60.169 – 10.55.60.170	10.55.60.171
44	10.55.60.172/30	10.55.60.173 – 10.55.60.174	10.55.60.175
45	10.55.60.176/30	10.55.60.177 – 10.55.60.178	10.55.60.179
46	10.55.60.180/30	10.55.60.181 – 10.55.60.182	10.55.60.183
47	10.55.60.184/30	10.55.60.185 – 10.55.60.186	10.55.60.187
48	10.55.60.188/30	10.55.60.189 – 10.55.60.190	10.55.60.191
49	10.55.60.192/30	10.55.60.193 – 10.55.60.194	10.55.60.195
50	10.55.60.196/30	10.55.60.197 – 10.55.60.198	10.55.60.199
51	10.55.60.200/30	10.55.60.201 – 10.55.60.202	10.55.60.203
52	10.55.60.204/30	10.55.60.205 – 10.55.60.206	10.55.60.207
53	10.55.60.208/30	10.55.60.209 – 10.55.60.210	10.55.60.211
54	10.55.60.212/30	10.55.60.213 – 10.55.60.214	10.55.60.215
55	10.55.60.216/30	10.55.60.217 – 10.55.60.218	10.55.60.219
56	10.55.60.220/30	10.55.60.221 – 10.55.60.222	10.55.60.223
57	10.55.60.224/30	10.55.60.225 – 10.55.60.226	10.55.60.227
58	10.55.60.228/30	10.55.60.229 – 10.55.60.230	10.55.60.231
59	10.55.60.232/30	10.55.60.233 – 10.55.60.234	10.55.60.235
60	10.55.60.236/30	10.55.60.237 – 10.55.60.238	10.55.60.239
61	10.55.60.240/30	10.55.60.241 – 10.55.60.242	10.55.60.243
62	10.55.60.244/30	10.55.60.245 – 10.55.60.246	10.55.60.247
63	10.55.60.248/30	10.55.60.249 – 10.55.60.250	10.55.60.251
64	10.55.60.252/30	10.55.60.253 – 10.55.60.254	10.55.60.255
65	10.55.61.0/30	10.55.61.1 – 10.55.61.2	10.55.61.3
66	10.55.61.4/30	10.55.61.5 – 10.55.61.6	10.55.61.7
67	10.55.61.8/30	10.55.61.9 – 10.55.61.10	10.55.61.11
68	10.55.61.12/30	10.55.61.13 – 10.55.61.14	10.55.61.15
69	10.55.61.16/30	10.55.61.17 – 10.55.61.18	10.55.61.19
70	10.55.61.20/30	10.55.61.21 – 10.55.61.22	10.55.61.23
71	10.55.61.24/30	10.55.61.25 – 10.55.61.26	10.55.61.27
72	10.55.61.28/30	10.55.61.29 – 10.55.61.30	10.55.61.31
73	10.55.61.32/30	10.55.61.33 – 10.55.61.34	10.55.61.35
74	10.55.61.36/30	10.55.61.37 – 10.55.61.38	10.55.61.39
75	10.55.61.40/30	10.55.61.41 – 10.55.61.42	10.55.61.43
76	10.55.61.44/30	10.55.61.45 – 10.55.61.46	10.55.61.47
77	10.55.61.48/30	10.55.61.49 – 10.55.61.50	10.55.61.51
78	10.55.61.52/30	10.55.61.53 – 10.55.61.54	10.55.61.55
79	10.55.61.56/30	10.55.61.57 – 10.55.61.58	10.55.61.59
80	10.55.61.60/30	10.55.61.61 – 10.55.61.62	10.55.61.63
81	10.55.61.64/30	10.55.61.65 – 10.55.61.66	10.55.61.67
82	10.55.61.68/30	10.55.61.69 – 10.55.61.70	10.55.61.71
83	10.55.61.72/30	10.55.61.73 – 10.55.61.74	10.55.61.75
84	10.55.61.76/30	10.55.61.77 – 10.55.61.78	10.55.61.79
85	10.55.61.80/30	10.55.61.81 – 10.55.61.82	10.55.61.83
86	10.55.61.84/30	10.55.61.85 – 10.55.61.86	10.55.61.87
87	10.55.61.88/30	10.55.61.89 – 10.55.61.90	10.55.61.91
88	10.55.61.92/30	10.55.61.93 – 10.55.61.94	10.55.61.95
89	10.55.61.96/30	10.55.61.97 – 10.55.61.98	10.55.61.99
90	10.55.61.100/30	10.55.61.101 – 10.55.61.102	10.55.61.103
91	10.55.61.104/30	10.55.61.105 – 10.55.61.106	10.55.61.107
92	10.55.61.108/30	10.55.61.109 – 10.55.61.110	10.55.61.111
93	10.55.61.112/30	10.55.61.113 – 10.55.61.114	10.55.61.115
94	10.55.61.116/30	10.55.61.117 – 10.55.61.118	10.55.61.119
95	10.55.61.120/30	10.55.61.121 – 10.55.61.122	10.55.61.123
96	10.55.61.124/30	10.55.61.125 – 10.55.61.126	10.55.61.127
97	10.55.61.128/30	10.55.61.129 – 10.55.61.130	10.55.61.131
98	10.55.61.132/30	10.55.61.133 – 10.55.61.134	10.55.61.135
99	10.55.61.136/30	10.55.61.137 – 10.55.61.138	10.55.61.139
100	10.55.61.140/30	10.55.61.141 – 10.55.61.142	10.55.61.143
101	10.55.61.144/30	10.55.61.145 – 10.55.61.146	10.55.61.147
102	10.55.61.148/30	10.55.61.149 – 10.55.61.150	10.55.61.151
103	10.55.61.152/30	10.55.61.153 – 10.55.61.154	10.55.61.155
104	10.55.61.156/30	10.55.61.157 – 10.55.61.158	10.55.61.159
105	10.55.61.160/30	10.55.61.161 – 10.55.61.162	10.55.61.163
106	10.55.61.164/30	10.55.61.165 – 10.55.61.166	10.55.61.167
107	10.55.61.168/30	10.55.61.169 – 10.55.61.170	10.55.61.171
108	10.55.61.172/30	10.55.61.173 – 10.55.61.174	10.55.61.175
109	10.55.61.176/30	10.55.61.177 – 10.55.61.178	10.55.61.179
110	10.55.61.180/30	10.55.61.181 – 10.55.61.182	10.55.61.183
111	10.55.61.184/30	10.55.61.185 – 10.55.61.186	10.55.61.187
112	10.55.61.188/30	10.55.61.189 – 10.55.61.190	10.55.61.191
113	10.55.61.192/30	10.55.61.193 – 10.55.61.194	10.55.61.195
114	10.55.61.196/30	10.55.61.197 – 10.55.61.198	10.55.61.199
115	10.55.61.200/30	10.55.61.201 – 10.55.61.202	10.55.61.203
116	10.55.61.204/30	10.55.61.205 – 10.55.61.206	10.55.61.207
117	10.55.61.208/30	10.55.61.209 – 10.55.61.210	10.55.61.211
118	10.55.61.212/30	10.55.61.213 – 10.55.61.214	10.55.61.215
119	10.55.61.216/30	10.55.61.217 – 10.55.61.218	10.55.61.219
120	10.55.61.220/30	10.55.61.221 – 10.55.61.222	10.55.61.223
121	10.55.61.224/30	10.55.61.225 – 10.55.61.226	10.55.61.227
122	10.55.61.228/30	10.55.61.229 – 10.55.61.230	10.55.61.231
123	10.55.61.232/30	10.55.61.233 – 10.55.61.234	10.55.61.235
124	10.55.61.236/30	10.55.61.237 – 10.55.61.238	10.55.61.239
125	10.55.61.240/30	10.55.61.241 – 10.55.61.242	10.55.61.243
126	10.55.61.244/30	10.55.61.245 – 10.55.61.246	10.55.61.247
127	10.55.61.248/30	10.55.61.249 – 10.55.61.250	10.55.61.251
128	10.55.61.252/30	10.55.61.253 – 10.55.61.254	10.55.61.255
129	10.55.62.0/30	10.55.62.1 – 10.55.62.2	10.55.62.3
130	10.55.62.4/30	10.55.62.5 – 10.55.62.6	10.55.62.7
131	10.55.62.8/30	10.55.62.9 – 10.55.62.10	10.55.62.11
132	10.55.62.12/30	10.55.62.13 – 10.55.62.14	10.55.62.15
133	10.55.62.16/30	10.55.62.17 – 10.55.62.18	10.55.62.19
134	10.55.62.20/30	10.55.62.21 – 10.55.62.22	10.55.62.23
135	10.55.62.24/30	10.55.62.25 – 10.55.62.26	10.55.62.27
136	10.55.62.28/30	10.55.62.29 – 10.55.62.30	10.55.62.31
137	10.55.62.32/30	10.55.62.33 – 10.55.62.34	10.55.62.35
138	10.55.62.36/30	10.55.62.37 – 10.55.62.38	10.55.62.39
139	10.55.62.40/30	10.55.62.41 – 10.55.62.42	10.55.62.43
140	10.55.62.44/30	10.55.62.45 – 10.55.62.46	10.55.62.47
141	10.55.62.48/30	10.55.62.49 – 10.55.62.50	10.55.62.51
142	10.55.62.52/30	10.55.62.53 – 10.55.62.54	10.55.62.55
143	10.55.62.56/30	10.55.62.57 – 10.55.62.58	10.55.62.59
144	10.55.62.60/30	10.55.62.61 – 10.55.62.62	10.55.62.63
145	10.55.62.64/30	10.55.62.65 – 10.55.62.66	10.55.62.67
146	10.55.62.68/30	10.55.62.69 – 10.55.62.70	10.55.62.71
147	10.55.62.72/30	10.55.62.73 – 10.55.62.74	10.55.62.75
148	10.55.62.76/30	10.55.62.77 – 10.55.62.78	10.55.62.79
149	10.55.62.80/30	10.55.62.81 – 10.55.62.82	10.55.62.83
150	10.55.62.84/30	10.55.62.85 – 10.55.62.86	10.55.62.87
151	10.55.62.88/30	10.55.62.89 – 10.55.62.90	10.55.62.91
152	10.55.62.92/30	10.55.62.93 – 10.55.62.94	10.55.62.95
153	10.55.62.96/30	10.55.62.97 – 10.55.62.98	10.55.62.99
154	10.55.62.100/30	10.55.62.101 – 10.55.62.102	10.55.62.103
155	10.55.62.104/30	10.55.62.105 – 10.55.62.106	10.55.62.107
156	10.55.62.108/30	10.55.62.109 – 10.55.62.110	10.55.62.111
157	10.55.62.112/30	10.55.62.113 – 10.55.62.114	10.55.62.115
158	10.55.62.116/30	10.55.62.117 – 10.55.62.118	10.55.62.119
159	10.55.62.120/30	10.55.62.121 – 10.55.62.122	10.55.62.123
160	10.55.62.124/30	10.55.62.125 – 10.55.62.126	10.55.62.127
161	10.55.62.128/30	10.55.62.129 – 10.55.62.130	10.55.62.131
162	10.55.62.132/30	10.55.62.133 – 10.55.62.134	10.55.62.135
163	10.55.62.136/30	10.55.62.137 – 10.55.62.138	10.55.62.139
164	10.55.62.140/30	10.55.62.141 – 10.55.62.142	10.55.62.143
165	10.55.62.144/30	10.55.62.145 – 10.55.62.146	10.55.62.147
166	10.55.62.148/30	10.55.62.149 – 10.55.62.150	10.55.62.151
167	10.55.62.152/30	10.55.62.153 – 10.55.62.154	10.55.62.155
168	10.55.62.156/30	10.55.62.157 – 10.55.62.158	10.55.62.159
169	10.55.62.160/30	10.55.62.161 – 10.55.62.162	10.55.62.163
170	10.55.62.164/30	10.55.62.165 – 10.55.62.166	10.55.62.167
171	10.55.62.168/30	10.55.62.169 – 10.55.62.170	10.55.62.171
172	10.55.62.172/30	10.55.62.173 – 10.55.62.174	10.55.62.175
173	10.55.62.176/30	10.55.62.177 – 10.55.62.178	10.55.62.179
174	10.55.62.180/30	10.55.62.181 – 10.55.62.182	10.55.62.183
175	10.55.62.184/30	10.55.62.185 – 10.55.62.186	10.55.62.187
176	10.55.62.188/30	10.55.62.189 – 10.55.62.190	10.55.62.191
177	10.55.62.192/30	10.55.62.193 – 10.55.62.194	10.55.62.195
178	10.55.62.196/30	10.55.62.197 – 10.55.62.198	10.55.62.199
179	10.55.62.200/30	10.55.62.201 – 10.55.62.202	10.55.62.203
180	10.55.62.204/30	10.55.62.205 – 10.55.62.206	10.55.62.207
181	10.55.62.208/30	10.55.62.209 – 10.55.62.210	10.55.62.211
182	10.55.62.212/30	10.55.62.213 – 10.55.62.214	10.55.62.215
183	10.55.62.216/30	10.55.62.217 – 10.55.62.218	10.55.62.219
184	10.55.62.220/30	10.55.62.221 – 10.55.62.222	10.55.62.223
185	10.55.62.224/30	10.55.62.225 – 10.55.62.226	10.55.62.227
186	10.55.62.228/30	10.55.62.229 – 10.55.62.230	10.55.62.231
187	10.55.62.232/30	10.55.62.233 – 10.55.62.234	10.55.62.235
188	10.55.62.236/30	10.55.62.237 – 10.55.62.238	10.55.62.239
189	10.55.62.240/30	10.55.62.241 – 10.55.62.242	10.55.62.243
190	10.55.62.244/30	10.55.62.245 – 10.55.62.246	10.55.62.247
191	10.55.62.248/30	10.55.62.249 – 10.55.62.250	10.55.62.251
192	10.55.62.252/30	10.55.62.253 – 10.55.62.254	10.55.62.255
193	10.55.63.0/30	10.55.63.1 – 10.55.63.2	10.55.63.3
194	10.55.63.4/30	10.55.63.5 – 10.55.63.6	10.55.63.7
195	10.55.63.8/30	10.55.63.9 – 10.55.63.10	10.55.63.11
196	10.55.63.12/30	10.55.63.13 – 10.55.63.14	10.55.63.15
197	10.55.63.16/30	10.55.63.17 – 10.55.63.18	10.55.63.19
198	10.55.63.20/30	10.55.63.21 – 10.55.63.22	10.55.63.23
199	10.55.63.24/30	10.55.63.25 – 10.55.63.26	10.55.63.27
200	10.55.63.28/30	10.55.63.29 – 10.55.63.30	10.55.63.31
201	10.55.63.32/30	10.55.63.33 – 10.55.63.34	10.55.63.35
202	10.55.63.36/30	10.55.63.37 – 10.55.63.38	10.55.63.39
203	10.55.63.40/30	10.55.63.41 – 10.55.63.42	10.55.63.43
204	10.55.63.44/30	10.55.63.45 – 10.55.63.46	10.55.63.47
205	10.55.63.48/30	10.55.63.49 – 10.55.63.50	10.55.63.51
206	10.55.63.52/30	10.55.63.53 – 10.55.63.54	10.55.63.55
207	10.55.63.56/30	10.55.63.57 – 10.55.63.58	10.55.63.59
208	10.55.63.60/30	10.55.63.61 – 10.55.63.62	10.55.63.63
209	10.55.63.64/30	10.55.63.65 – 10.55.63.66	10.55.63.67
210	10.55.63.68/30	10.55.63.69 – 10.55.63.70	10.55.63.71
211	10.55.63.72/30	10.55.63.73 – 10.55.63.74	10.55.63.75
212	10.55.63.76/30	10.55.63.77 – 10.55.63.78	10.55.63.79
213	10.55.63.80/30	10.55.63.81 – 10.55.63.82	10.55.63.83
214	10.55.63.84/30	10.55.63.85 – 10.55.63.86	10.55.63.87
215	10.55.63.88/30	10.55.63.89 – 10.55.63.90	10.55.63.91
216	10.55.63.92/30	10.55.63.93 – 10.55.63.94	10.55.63.95
217	10.55.63.96/30	10.55.63.97 – 10.55.63.98	10.55.63.99
218	10.55.63.100/30	10.55.63.101 – 10.55.63.102	10.55.63.103
219	10.55.63.104/30	10.55.63.105 – 10.55.63.106	10.55.63.107
220	10.55.63.108/30	10.55.63.109 – 10.55.63.110	10.55.63.111
221	10.55.63.112/30	10.55.63.113 – 10.55.63.114	10.55.63.115
222	10.55.63.116/30	10.55.63.117 – 10.55.63.118	10.55.63.119
223	10.55.63.120/30	10.55.63.121 – 10.55.63.122	10.55.63.123
224	10.55.63.124/30	10.55.63.125 – 10.55.63.126	10.55.63.127
225	10.55.63.128/30	10.55.63.129 – 10.55.63.130	10.55.63.131
226	10.55.63.132/30	10.55.63.133 – 10.55.63.134	10.55.63.135
227	10.55.63.136/30	10.55.63.137 – 10.55.63.138	10.55.63.139
228	10.55.63.140/30	10.55.63.141 – 10.55.63.142	10.55.63.143
229	10.55.63.144/30	10.55.63.145 – 10.55.63.146	10.55.63.147
230	10.55.63.148/30	10.55.63.149 – 10.55.63.150	10.55.63.151
231	10.55.63.152/30	10.55.63.153 – 10.55.63.154	10.55.63.155
232	10.55.63.156/30	10.55.63.157 – 10.55.63.158	10.55.63.159
233	10.55.63.160/30	10.55.63.161 – 10.55.63.162	10.55.63.163
234	10.55.63.164/30	10.55.63.165 – 10.55.63.166	10.55.63.167
235	10.55.63.168/30	10.55.63.169 – 10.55.63.170	10.55.63.171
236	10.55.63.172/30	10.55.63.173 – 10.55.63.174	10.55.63.175
237	10.55.63.176/30	10.55.63.177 – 10.55.63.178	10.55.63.179
238	10.55.63.180/30	10.55.63.181 – 10.55.63.182	10.55.63.183
239	10.55.63.184/30	10.55.63.185 – 10.55.63.186	10.55.63.187
240	10.55.63.188/30	10.55.63.189 – 10.55.63.190	10.55.63.191
241	10.55.63.192/30	10.55.63.193 – 10.55.63.194	10.55.63.195
242	10.55.63.196/30	10.55.63.197 – 10.55.63.198	10.55.63.199
243	10.55.63.200/30	10.55.63.201 – 10.55.63.202	10.55.63.203
244	10.55.63.204/30	10.55.63.205 – 10.55.63.206	10.55.63.207
245	10.55.63.208/30	10.55.63.209 – 10.55.63.210	10.55.63.211
246	10.55.63.212/30	10.55.63.213 – 10.55.63.214	10.55.63.215
247	10.55.63.216/30	10.55.63.217 – 10.55.63.218	10.55.63.219
248	10.55.63.220/30	10.55.63.221 – 10.55.63.222	10.55.63.223
249	10.55.63.224/30	10.55.63.225 – 10.55.63.226	10.55.63.227
250	10.55.63.228/30	10.55.63.229 – 10.55.63.230	10.55.63.231
251	10.55.63.232/30	10.55.63.233 – 10.55.63.234	10.55.63.235
252	10.55.63.236/30	10.55.63.237 – 10.55.63.238	10.55.63.239
253	10.55.63.240/30	10.55.63.241 – 10.55.63.242	10.55.63.243
254	10.55.63.244/30	10.55.63.245 – 10.55.63.246	10.55.63.247
255	10.55.63.248/30	10.55.63.249 – 10.55.63.250	10.55.63.251
256	10.55.63.252/30	10.55.63.253 – 10.55.63.254	10.55.63.255

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →