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)10.28.224.0/19

network10.28.224.0/19

broadcast10.28.255.255

first host10.28.224.1

last host10.28.255.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.28.224.0/19

address00001010.00011100.11100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011100.11100000.00000000

broadcast00001010.00011100.11111111.11111111

green = network part, grey = host part

hex0x0a1ce000

decimal169664512

reverse dns0.224.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:e000

/19 split into /27 · 256 subnets

close ×

#	network	host range	broadcast
1	10.28.224.0/27	10.28.224.1 – 10.28.224.30	10.28.224.31
2	10.28.224.32/27	10.28.224.33 – 10.28.224.62	10.28.224.63
3	10.28.224.64/27	10.28.224.65 – 10.28.224.94	10.28.224.95
4	10.28.224.96/27	10.28.224.97 – 10.28.224.126	10.28.224.127
5	10.28.224.128/27	10.28.224.129 – 10.28.224.158	10.28.224.159
6	10.28.224.160/27	10.28.224.161 – 10.28.224.190	10.28.224.191
7	10.28.224.192/27	10.28.224.193 – 10.28.224.222	10.28.224.223
8	10.28.224.224/27	10.28.224.225 – 10.28.224.254	10.28.224.255
9	10.28.225.0/27	10.28.225.1 – 10.28.225.30	10.28.225.31
10	10.28.225.32/27	10.28.225.33 – 10.28.225.62	10.28.225.63
11	10.28.225.64/27	10.28.225.65 – 10.28.225.94	10.28.225.95
12	10.28.225.96/27	10.28.225.97 – 10.28.225.126	10.28.225.127
13	10.28.225.128/27	10.28.225.129 – 10.28.225.158	10.28.225.159
14	10.28.225.160/27	10.28.225.161 – 10.28.225.190	10.28.225.191
15	10.28.225.192/27	10.28.225.193 – 10.28.225.222	10.28.225.223
16	10.28.225.224/27	10.28.225.225 – 10.28.225.254	10.28.225.255
17	10.28.226.0/27	10.28.226.1 – 10.28.226.30	10.28.226.31
18	10.28.226.32/27	10.28.226.33 – 10.28.226.62	10.28.226.63
19	10.28.226.64/27	10.28.226.65 – 10.28.226.94	10.28.226.95
20	10.28.226.96/27	10.28.226.97 – 10.28.226.126	10.28.226.127
21	10.28.226.128/27	10.28.226.129 – 10.28.226.158	10.28.226.159
22	10.28.226.160/27	10.28.226.161 – 10.28.226.190	10.28.226.191
23	10.28.226.192/27	10.28.226.193 – 10.28.226.222	10.28.226.223
24	10.28.226.224/27	10.28.226.225 – 10.28.226.254	10.28.226.255
25	10.28.227.0/27	10.28.227.1 – 10.28.227.30	10.28.227.31
26	10.28.227.32/27	10.28.227.33 – 10.28.227.62	10.28.227.63
27	10.28.227.64/27	10.28.227.65 – 10.28.227.94	10.28.227.95
28	10.28.227.96/27	10.28.227.97 – 10.28.227.126	10.28.227.127
29	10.28.227.128/27	10.28.227.129 – 10.28.227.158	10.28.227.159
30	10.28.227.160/27	10.28.227.161 – 10.28.227.190	10.28.227.191
31	10.28.227.192/27	10.28.227.193 – 10.28.227.222	10.28.227.223
32	10.28.227.224/27	10.28.227.225 – 10.28.227.254	10.28.227.255
33	10.28.228.0/27	10.28.228.1 – 10.28.228.30	10.28.228.31
34	10.28.228.32/27	10.28.228.33 – 10.28.228.62	10.28.228.63
35	10.28.228.64/27	10.28.228.65 – 10.28.228.94	10.28.228.95
36	10.28.228.96/27	10.28.228.97 – 10.28.228.126	10.28.228.127
37	10.28.228.128/27	10.28.228.129 – 10.28.228.158	10.28.228.159
38	10.28.228.160/27	10.28.228.161 – 10.28.228.190	10.28.228.191
39	10.28.228.192/27	10.28.228.193 – 10.28.228.222	10.28.228.223
40	10.28.228.224/27	10.28.228.225 – 10.28.228.254	10.28.228.255
41	10.28.229.0/27	10.28.229.1 – 10.28.229.30	10.28.229.31
42	10.28.229.32/27	10.28.229.33 – 10.28.229.62	10.28.229.63
43	10.28.229.64/27	10.28.229.65 – 10.28.229.94	10.28.229.95
44	10.28.229.96/27	10.28.229.97 – 10.28.229.126	10.28.229.127
45	10.28.229.128/27	10.28.229.129 – 10.28.229.158	10.28.229.159
46	10.28.229.160/27	10.28.229.161 – 10.28.229.190	10.28.229.191
47	10.28.229.192/27	10.28.229.193 – 10.28.229.222	10.28.229.223
48	10.28.229.224/27	10.28.229.225 – 10.28.229.254	10.28.229.255
49	10.28.230.0/27	10.28.230.1 – 10.28.230.30	10.28.230.31
50	10.28.230.32/27	10.28.230.33 – 10.28.230.62	10.28.230.63
51	10.28.230.64/27	10.28.230.65 – 10.28.230.94	10.28.230.95
52	10.28.230.96/27	10.28.230.97 – 10.28.230.126	10.28.230.127
53	10.28.230.128/27	10.28.230.129 – 10.28.230.158	10.28.230.159
54	10.28.230.160/27	10.28.230.161 – 10.28.230.190	10.28.230.191
55	10.28.230.192/27	10.28.230.193 – 10.28.230.222	10.28.230.223
56	10.28.230.224/27	10.28.230.225 – 10.28.230.254	10.28.230.255
57	10.28.231.0/27	10.28.231.1 – 10.28.231.30	10.28.231.31
58	10.28.231.32/27	10.28.231.33 – 10.28.231.62	10.28.231.63
59	10.28.231.64/27	10.28.231.65 – 10.28.231.94	10.28.231.95
60	10.28.231.96/27	10.28.231.97 – 10.28.231.126	10.28.231.127
61	10.28.231.128/27	10.28.231.129 – 10.28.231.158	10.28.231.159
62	10.28.231.160/27	10.28.231.161 – 10.28.231.190	10.28.231.191
63	10.28.231.192/27	10.28.231.193 – 10.28.231.222	10.28.231.223
64	10.28.231.224/27	10.28.231.225 – 10.28.231.254	10.28.231.255
65	10.28.232.0/27	10.28.232.1 – 10.28.232.30	10.28.232.31
66	10.28.232.32/27	10.28.232.33 – 10.28.232.62	10.28.232.63
67	10.28.232.64/27	10.28.232.65 – 10.28.232.94	10.28.232.95
68	10.28.232.96/27	10.28.232.97 – 10.28.232.126	10.28.232.127
69	10.28.232.128/27	10.28.232.129 – 10.28.232.158	10.28.232.159
70	10.28.232.160/27	10.28.232.161 – 10.28.232.190	10.28.232.191
71	10.28.232.192/27	10.28.232.193 – 10.28.232.222	10.28.232.223
72	10.28.232.224/27	10.28.232.225 – 10.28.232.254	10.28.232.255
73	10.28.233.0/27	10.28.233.1 – 10.28.233.30	10.28.233.31
74	10.28.233.32/27	10.28.233.33 – 10.28.233.62	10.28.233.63
75	10.28.233.64/27	10.28.233.65 – 10.28.233.94	10.28.233.95
76	10.28.233.96/27	10.28.233.97 – 10.28.233.126	10.28.233.127
77	10.28.233.128/27	10.28.233.129 – 10.28.233.158	10.28.233.159
78	10.28.233.160/27	10.28.233.161 – 10.28.233.190	10.28.233.191
79	10.28.233.192/27	10.28.233.193 – 10.28.233.222	10.28.233.223
80	10.28.233.224/27	10.28.233.225 – 10.28.233.254	10.28.233.255
81	10.28.234.0/27	10.28.234.1 – 10.28.234.30	10.28.234.31
82	10.28.234.32/27	10.28.234.33 – 10.28.234.62	10.28.234.63
83	10.28.234.64/27	10.28.234.65 – 10.28.234.94	10.28.234.95
84	10.28.234.96/27	10.28.234.97 – 10.28.234.126	10.28.234.127
85	10.28.234.128/27	10.28.234.129 – 10.28.234.158	10.28.234.159
86	10.28.234.160/27	10.28.234.161 – 10.28.234.190	10.28.234.191
87	10.28.234.192/27	10.28.234.193 – 10.28.234.222	10.28.234.223
88	10.28.234.224/27	10.28.234.225 – 10.28.234.254	10.28.234.255
89	10.28.235.0/27	10.28.235.1 – 10.28.235.30	10.28.235.31
90	10.28.235.32/27	10.28.235.33 – 10.28.235.62	10.28.235.63
91	10.28.235.64/27	10.28.235.65 – 10.28.235.94	10.28.235.95
92	10.28.235.96/27	10.28.235.97 – 10.28.235.126	10.28.235.127
93	10.28.235.128/27	10.28.235.129 – 10.28.235.158	10.28.235.159
94	10.28.235.160/27	10.28.235.161 – 10.28.235.190	10.28.235.191
95	10.28.235.192/27	10.28.235.193 – 10.28.235.222	10.28.235.223
96	10.28.235.224/27	10.28.235.225 – 10.28.235.254	10.28.235.255
97	10.28.236.0/27	10.28.236.1 – 10.28.236.30	10.28.236.31
98	10.28.236.32/27	10.28.236.33 – 10.28.236.62	10.28.236.63
99	10.28.236.64/27	10.28.236.65 – 10.28.236.94	10.28.236.95
100	10.28.236.96/27	10.28.236.97 – 10.28.236.126	10.28.236.127
101	10.28.236.128/27	10.28.236.129 – 10.28.236.158	10.28.236.159
102	10.28.236.160/27	10.28.236.161 – 10.28.236.190	10.28.236.191
103	10.28.236.192/27	10.28.236.193 – 10.28.236.222	10.28.236.223
104	10.28.236.224/27	10.28.236.225 – 10.28.236.254	10.28.236.255
105	10.28.237.0/27	10.28.237.1 – 10.28.237.30	10.28.237.31
106	10.28.237.32/27	10.28.237.33 – 10.28.237.62	10.28.237.63
107	10.28.237.64/27	10.28.237.65 – 10.28.237.94	10.28.237.95
108	10.28.237.96/27	10.28.237.97 – 10.28.237.126	10.28.237.127
109	10.28.237.128/27	10.28.237.129 – 10.28.237.158	10.28.237.159
110	10.28.237.160/27	10.28.237.161 – 10.28.237.190	10.28.237.191
111	10.28.237.192/27	10.28.237.193 – 10.28.237.222	10.28.237.223
112	10.28.237.224/27	10.28.237.225 – 10.28.237.254	10.28.237.255
113	10.28.238.0/27	10.28.238.1 – 10.28.238.30	10.28.238.31
114	10.28.238.32/27	10.28.238.33 – 10.28.238.62	10.28.238.63
115	10.28.238.64/27	10.28.238.65 – 10.28.238.94	10.28.238.95
116	10.28.238.96/27	10.28.238.97 – 10.28.238.126	10.28.238.127
117	10.28.238.128/27	10.28.238.129 – 10.28.238.158	10.28.238.159
118	10.28.238.160/27	10.28.238.161 – 10.28.238.190	10.28.238.191
119	10.28.238.192/27	10.28.238.193 – 10.28.238.222	10.28.238.223
120	10.28.238.224/27	10.28.238.225 – 10.28.238.254	10.28.238.255
121	10.28.239.0/27	10.28.239.1 – 10.28.239.30	10.28.239.31
122	10.28.239.32/27	10.28.239.33 – 10.28.239.62	10.28.239.63
123	10.28.239.64/27	10.28.239.65 – 10.28.239.94	10.28.239.95
124	10.28.239.96/27	10.28.239.97 – 10.28.239.126	10.28.239.127
125	10.28.239.128/27	10.28.239.129 – 10.28.239.158	10.28.239.159
126	10.28.239.160/27	10.28.239.161 – 10.28.239.190	10.28.239.191
127	10.28.239.192/27	10.28.239.193 – 10.28.239.222	10.28.239.223
128	10.28.239.224/27	10.28.239.225 – 10.28.239.254	10.28.239.255
129	10.28.240.0/27	10.28.240.1 – 10.28.240.30	10.28.240.31
130	10.28.240.32/27	10.28.240.33 – 10.28.240.62	10.28.240.63
131	10.28.240.64/27	10.28.240.65 – 10.28.240.94	10.28.240.95
132	10.28.240.96/27	10.28.240.97 – 10.28.240.126	10.28.240.127
133	10.28.240.128/27	10.28.240.129 – 10.28.240.158	10.28.240.159
134	10.28.240.160/27	10.28.240.161 – 10.28.240.190	10.28.240.191
135	10.28.240.192/27	10.28.240.193 – 10.28.240.222	10.28.240.223
136	10.28.240.224/27	10.28.240.225 – 10.28.240.254	10.28.240.255
137	10.28.241.0/27	10.28.241.1 – 10.28.241.30	10.28.241.31
138	10.28.241.32/27	10.28.241.33 – 10.28.241.62	10.28.241.63
139	10.28.241.64/27	10.28.241.65 – 10.28.241.94	10.28.241.95
140	10.28.241.96/27	10.28.241.97 – 10.28.241.126	10.28.241.127
141	10.28.241.128/27	10.28.241.129 – 10.28.241.158	10.28.241.159
142	10.28.241.160/27	10.28.241.161 – 10.28.241.190	10.28.241.191
143	10.28.241.192/27	10.28.241.193 – 10.28.241.222	10.28.241.223
144	10.28.241.224/27	10.28.241.225 – 10.28.241.254	10.28.241.255
145	10.28.242.0/27	10.28.242.1 – 10.28.242.30	10.28.242.31
146	10.28.242.32/27	10.28.242.33 – 10.28.242.62	10.28.242.63
147	10.28.242.64/27	10.28.242.65 – 10.28.242.94	10.28.242.95
148	10.28.242.96/27	10.28.242.97 – 10.28.242.126	10.28.242.127
149	10.28.242.128/27	10.28.242.129 – 10.28.242.158	10.28.242.159
150	10.28.242.160/27	10.28.242.161 – 10.28.242.190	10.28.242.191
151	10.28.242.192/27	10.28.242.193 – 10.28.242.222	10.28.242.223
152	10.28.242.224/27	10.28.242.225 – 10.28.242.254	10.28.242.255
153	10.28.243.0/27	10.28.243.1 – 10.28.243.30	10.28.243.31
154	10.28.243.32/27	10.28.243.33 – 10.28.243.62	10.28.243.63
155	10.28.243.64/27	10.28.243.65 – 10.28.243.94	10.28.243.95
156	10.28.243.96/27	10.28.243.97 – 10.28.243.126	10.28.243.127
157	10.28.243.128/27	10.28.243.129 – 10.28.243.158	10.28.243.159
158	10.28.243.160/27	10.28.243.161 – 10.28.243.190	10.28.243.191
159	10.28.243.192/27	10.28.243.193 – 10.28.243.222	10.28.243.223
160	10.28.243.224/27	10.28.243.225 – 10.28.243.254	10.28.243.255
161	10.28.244.0/27	10.28.244.1 – 10.28.244.30	10.28.244.31
162	10.28.244.32/27	10.28.244.33 – 10.28.244.62	10.28.244.63
163	10.28.244.64/27	10.28.244.65 – 10.28.244.94	10.28.244.95
164	10.28.244.96/27	10.28.244.97 – 10.28.244.126	10.28.244.127
165	10.28.244.128/27	10.28.244.129 – 10.28.244.158	10.28.244.159
166	10.28.244.160/27	10.28.244.161 – 10.28.244.190	10.28.244.191
167	10.28.244.192/27	10.28.244.193 – 10.28.244.222	10.28.244.223
168	10.28.244.224/27	10.28.244.225 – 10.28.244.254	10.28.244.255
169	10.28.245.0/27	10.28.245.1 – 10.28.245.30	10.28.245.31
170	10.28.245.32/27	10.28.245.33 – 10.28.245.62	10.28.245.63
171	10.28.245.64/27	10.28.245.65 – 10.28.245.94	10.28.245.95
172	10.28.245.96/27	10.28.245.97 – 10.28.245.126	10.28.245.127
173	10.28.245.128/27	10.28.245.129 – 10.28.245.158	10.28.245.159
174	10.28.245.160/27	10.28.245.161 – 10.28.245.190	10.28.245.191
175	10.28.245.192/27	10.28.245.193 – 10.28.245.222	10.28.245.223
176	10.28.245.224/27	10.28.245.225 – 10.28.245.254	10.28.245.255
177	10.28.246.0/27	10.28.246.1 – 10.28.246.30	10.28.246.31
178	10.28.246.32/27	10.28.246.33 – 10.28.246.62	10.28.246.63
179	10.28.246.64/27	10.28.246.65 – 10.28.246.94	10.28.246.95
180	10.28.246.96/27	10.28.246.97 – 10.28.246.126	10.28.246.127
181	10.28.246.128/27	10.28.246.129 – 10.28.246.158	10.28.246.159
182	10.28.246.160/27	10.28.246.161 – 10.28.246.190	10.28.246.191
183	10.28.246.192/27	10.28.246.193 – 10.28.246.222	10.28.246.223
184	10.28.246.224/27	10.28.246.225 – 10.28.246.254	10.28.246.255
185	10.28.247.0/27	10.28.247.1 – 10.28.247.30	10.28.247.31
186	10.28.247.32/27	10.28.247.33 – 10.28.247.62	10.28.247.63
187	10.28.247.64/27	10.28.247.65 – 10.28.247.94	10.28.247.95
188	10.28.247.96/27	10.28.247.97 – 10.28.247.126	10.28.247.127
189	10.28.247.128/27	10.28.247.129 – 10.28.247.158	10.28.247.159
190	10.28.247.160/27	10.28.247.161 – 10.28.247.190	10.28.247.191
191	10.28.247.192/27	10.28.247.193 – 10.28.247.222	10.28.247.223
192	10.28.247.224/27	10.28.247.225 – 10.28.247.254	10.28.247.255
193	10.28.248.0/27	10.28.248.1 – 10.28.248.30	10.28.248.31
194	10.28.248.32/27	10.28.248.33 – 10.28.248.62	10.28.248.63
195	10.28.248.64/27	10.28.248.65 – 10.28.248.94	10.28.248.95
196	10.28.248.96/27	10.28.248.97 – 10.28.248.126	10.28.248.127
197	10.28.248.128/27	10.28.248.129 – 10.28.248.158	10.28.248.159
198	10.28.248.160/27	10.28.248.161 – 10.28.248.190	10.28.248.191
199	10.28.248.192/27	10.28.248.193 – 10.28.248.222	10.28.248.223
200	10.28.248.224/27	10.28.248.225 – 10.28.248.254	10.28.248.255
201	10.28.249.0/27	10.28.249.1 – 10.28.249.30	10.28.249.31
202	10.28.249.32/27	10.28.249.33 – 10.28.249.62	10.28.249.63
203	10.28.249.64/27	10.28.249.65 – 10.28.249.94	10.28.249.95
204	10.28.249.96/27	10.28.249.97 – 10.28.249.126	10.28.249.127
205	10.28.249.128/27	10.28.249.129 – 10.28.249.158	10.28.249.159
206	10.28.249.160/27	10.28.249.161 – 10.28.249.190	10.28.249.191
207	10.28.249.192/27	10.28.249.193 – 10.28.249.222	10.28.249.223
208	10.28.249.224/27	10.28.249.225 – 10.28.249.254	10.28.249.255
209	10.28.250.0/27	10.28.250.1 – 10.28.250.30	10.28.250.31
210	10.28.250.32/27	10.28.250.33 – 10.28.250.62	10.28.250.63
211	10.28.250.64/27	10.28.250.65 – 10.28.250.94	10.28.250.95
212	10.28.250.96/27	10.28.250.97 – 10.28.250.126	10.28.250.127
213	10.28.250.128/27	10.28.250.129 – 10.28.250.158	10.28.250.159
214	10.28.250.160/27	10.28.250.161 – 10.28.250.190	10.28.250.191
215	10.28.250.192/27	10.28.250.193 – 10.28.250.222	10.28.250.223
216	10.28.250.224/27	10.28.250.225 – 10.28.250.254	10.28.250.255
217	10.28.251.0/27	10.28.251.1 – 10.28.251.30	10.28.251.31
218	10.28.251.32/27	10.28.251.33 – 10.28.251.62	10.28.251.63
219	10.28.251.64/27	10.28.251.65 – 10.28.251.94	10.28.251.95
220	10.28.251.96/27	10.28.251.97 – 10.28.251.126	10.28.251.127
221	10.28.251.128/27	10.28.251.129 – 10.28.251.158	10.28.251.159
222	10.28.251.160/27	10.28.251.161 – 10.28.251.190	10.28.251.191
223	10.28.251.192/27	10.28.251.193 – 10.28.251.222	10.28.251.223
224	10.28.251.224/27	10.28.251.225 – 10.28.251.254	10.28.251.255
225	10.28.252.0/27	10.28.252.1 – 10.28.252.30	10.28.252.31
226	10.28.252.32/27	10.28.252.33 – 10.28.252.62	10.28.252.63
227	10.28.252.64/27	10.28.252.65 – 10.28.252.94	10.28.252.95
228	10.28.252.96/27	10.28.252.97 – 10.28.252.126	10.28.252.127
229	10.28.252.128/27	10.28.252.129 – 10.28.252.158	10.28.252.159
230	10.28.252.160/27	10.28.252.161 – 10.28.252.190	10.28.252.191
231	10.28.252.192/27	10.28.252.193 – 10.28.252.222	10.28.252.223
232	10.28.252.224/27	10.28.252.225 – 10.28.252.254	10.28.252.255
233	10.28.253.0/27	10.28.253.1 – 10.28.253.30	10.28.253.31
234	10.28.253.32/27	10.28.253.33 – 10.28.253.62	10.28.253.63
235	10.28.253.64/27	10.28.253.65 – 10.28.253.94	10.28.253.95
236	10.28.253.96/27	10.28.253.97 – 10.28.253.126	10.28.253.127
237	10.28.253.128/27	10.28.253.129 – 10.28.253.158	10.28.253.159
238	10.28.253.160/27	10.28.253.161 – 10.28.253.190	10.28.253.191
239	10.28.253.192/27	10.28.253.193 – 10.28.253.222	10.28.253.223
240	10.28.253.224/27	10.28.253.225 – 10.28.253.254	10.28.253.255
241	10.28.254.0/27	10.28.254.1 – 10.28.254.30	10.28.254.31
242	10.28.254.32/27	10.28.254.33 – 10.28.254.62	10.28.254.63
243	10.28.254.64/27	10.28.254.65 – 10.28.254.94	10.28.254.95
244	10.28.254.96/27	10.28.254.97 – 10.28.254.126	10.28.254.127
245	10.28.254.128/27	10.28.254.129 – 10.28.254.158	10.28.254.159
246	10.28.254.160/27	10.28.254.161 – 10.28.254.190	10.28.254.191
247	10.28.254.192/27	10.28.254.193 – 10.28.254.222	10.28.254.223
248	10.28.254.224/27	10.28.254.225 – 10.28.254.254	10.28.254.255
249	10.28.255.0/27	10.28.255.1 – 10.28.255.30	10.28.255.31
250	10.28.255.32/27	10.28.255.33 – 10.28.255.62	10.28.255.63
251	10.28.255.64/27	10.28.255.65 – 10.28.255.94	10.28.255.95
252	10.28.255.96/27	10.28.255.97 – 10.28.255.126	10.28.255.127
253	10.28.255.128/27	10.28.255.129 – 10.28.255.158	10.28.255.159
254	10.28.255.160/27	10.28.255.161 – 10.28.255.190	10.28.255.191
255	10.28.255.192/27	10.28.255.193 – 10.28.255.222	10.28.255.223
256	10.28.255.224/27	10.28.255.225 – 10.28.255.254	10.28.255.255

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →