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)10.83.0.0/16

network10.83.0.0/16

broadcast10.83.255.255

first host10.83.0.1

last host10.83.255.254

subnet mask255.255.0.0

wildcard0.0.255.255

addresses65,536

usable hosts65,534

classA

ipcalc 10.83.0.0/16

address00001010.01010011.00000000.00000000

subnet mask11111111.11111111.00000000.00000000

network00001010.01010011.00000000.00000000

broadcast00001010.01010011.11111111.11111111

green = network part, grey = host part

hex0x0a530000

decimal173211648

reverse dns0.0.83.10.in-addr.arpa

ipv4-mapped::ffff:a53:0

/16 split into /24 · 256 subnets

close ×

#	network	host range	broadcast
1	10.83.0.0/24	10.83.0.1 – 10.83.0.254	10.83.0.255
2	10.83.1.0/24	10.83.1.1 – 10.83.1.254	10.83.1.255
3	10.83.2.0/24	10.83.2.1 – 10.83.2.254	10.83.2.255
4	10.83.3.0/24	10.83.3.1 – 10.83.3.254	10.83.3.255
5	10.83.4.0/24	10.83.4.1 – 10.83.4.254	10.83.4.255
6	10.83.5.0/24	10.83.5.1 – 10.83.5.254	10.83.5.255
7	10.83.6.0/24	10.83.6.1 – 10.83.6.254	10.83.6.255
8	10.83.7.0/24	10.83.7.1 – 10.83.7.254	10.83.7.255
9	10.83.8.0/24	10.83.8.1 – 10.83.8.254	10.83.8.255
10	10.83.9.0/24	10.83.9.1 – 10.83.9.254	10.83.9.255
11	10.83.10.0/24	10.83.10.1 – 10.83.10.254	10.83.10.255
12	10.83.11.0/24	10.83.11.1 – 10.83.11.254	10.83.11.255
13	10.83.12.0/24	10.83.12.1 – 10.83.12.254	10.83.12.255
14	10.83.13.0/24	10.83.13.1 – 10.83.13.254	10.83.13.255
15	10.83.14.0/24	10.83.14.1 – 10.83.14.254	10.83.14.255
16	10.83.15.0/24	10.83.15.1 – 10.83.15.254	10.83.15.255
17	10.83.16.0/24	10.83.16.1 – 10.83.16.254	10.83.16.255
18	10.83.17.0/24	10.83.17.1 – 10.83.17.254	10.83.17.255
19	10.83.18.0/24	10.83.18.1 – 10.83.18.254	10.83.18.255
20	10.83.19.0/24	10.83.19.1 – 10.83.19.254	10.83.19.255
21	10.83.20.0/24	10.83.20.1 – 10.83.20.254	10.83.20.255
22	10.83.21.0/24	10.83.21.1 – 10.83.21.254	10.83.21.255
23	10.83.22.0/24	10.83.22.1 – 10.83.22.254	10.83.22.255
24	10.83.23.0/24	10.83.23.1 – 10.83.23.254	10.83.23.255
25	10.83.24.0/24	10.83.24.1 – 10.83.24.254	10.83.24.255
26	10.83.25.0/24	10.83.25.1 – 10.83.25.254	10.83.25.255
27	10.83.26.0/24	10.83.26.1 – 10.83.26.254	10.83.26.255
28	10.83.27.0/24	10.83.27.1 – 10.83.27.254	10.83.27.255
29	10.83.28.0/24	10.83.28.1 – 10.83.28.254	10.83.28.255
30	10.83.29.0/24	10.83.29.1 – 10.83.29.254	10.83.29.255
31	10.83.30.0/24	10.83.30.1 – 10.83.30.254	10.83.30.255
32	10.83.31.0/24	10.83.31.1 – 10.83.31.254	10.83.31.255
33	10.83.32.0/24	10.83.32.1 – 10.83.32.254	10.83.32.255
34	10.83.33.0/24	10.83.33.1 – 10.83.33.254	10.83.33.255
35	10.83.34.0/24	10.83.34.1 – 10.83.34.254	10.83.34.255
36	10.83.35.0/24	10.83.35.1 – 10.83.35.254	10.83.35.255
37	10.83.36.0/24	10.83.36.1 – 10.83.36.254	10.83.36.255
38	10.83.37.0/24	10.83.37.1 – 10.83.37.254	10.83.37.255
39	10.83.38.0/24	10.83.38.1 – 10.83.38.254	10.83.38.255
40	10.83.39.0/24	10.83.39.1 – 10.83.39.254	10.83.39.255
41	10.83.40.0/24	10.83.40.1 – 10.83.40.254	10.83.40.255
42	10.83.41.0/24	10.83.41.1 – 10.83.41.254	10.83.41.255
43	10.83.42.0/24	10.83.42.1 – 10.83.42.254	10.83.42.255
44	10.83.43.0/24	10.83.43.1 – 10.83.43.254	10.83.43.255
45	10.83.44.0/24	10.83.44.1 – 10.83.44.254	10.83.44.255
46	10.83.45.0/24	10.83.45.1 – 10.83.45.254	10.83.45.255
47	10.83.46.0/24	10.83.46.1 – 10.83.46.254	10.83.46.255
48	10.83.47.0/24	10.83.47.1 – 10.83.47.254	10.83.47.255
49	10.83.48.0/24	10.83.48.1 – 10.83.48.254	10.83.48.255
50	10.83.49.0/24	10.83.49.1 – 10.83.49.254	10.83.49.255
51	10.83.50.0/24	10.83.50.1 – 10.83.50.254	10.83.50.255
52	10.83.51.0/24	10.83.51.1 – 10.83.51.254	10.83.51.255
53	10.83.52.0/24	10.83.52.1 – 10.83.52.254	10.83.52.255
54	10.83.53.0/24	10.83.53.1 – 10.83.53.254	10.83.53.255
55	10.83.54.0/24	10.83.54.1 – 10.83.54.254	10.83.54.255
56	10.83.55.0/24	10.83.55.1 – 10.83.55.254	10.83.55.255
57	10.83.56.0/24	10.83.56.1 – 10.83.56.254	10.83.56.255
58	10.83.57.0/24	10.83.57.1 – 10.83.57.254	10.83.57.255
59	10.83.58.0/24	10.83.58.1 – 10.83.58.254	10.83.58.255
60	10.83.59.0/24	10.83.59.1 – 10.83.59.254	10.83.59.255
61	10.83.60.0/24	10.83.60.1 – 10.83.60.254	10.83.60.255
62	10.83.61.0/24	10.83.61.1 – 10.83.61.254	10.83.61.255
63	10.83.62.0/24	10.83.62.1 – 10.83.62.254	10.83.62.255
64	10.83.63.0/24	10.83.63.1 – 10.83.63.254	10.83.63.255
65	10.83.64.0/24	10.83.64.1 – 10.83.64.254	10.83.64.255
66	10.83.65.0/24	10.83.65.1 – 10.83.65.254	10.83.65.255
67	10.83.66.0/24	10.83.66.1 – 10.83.66.254	10.83.66.255
68	10.83.67.0/24	10.83.67.1 – 10.83.67.254	10.83.67.255
69	10.83.68.0/24	10.83.68.1 – 10.83.68.254	10.83.68.255
70	10.83.69.0/24	10.83.69.1 – 10.83.69.254	10.83.69.255
71	10.83.70.0/24	10.83.70.1 – 10.83.70.254	10.83.70.255
72	10.83.71.0/24	10.83.71.1 – 10.83.71.254	10.83.71.255
73	10.83.72.0/24	10.83.72.1 – 10.83.72.254	10.83.72.255
74	10.83.73.0/24	10.83.73.1 – 10.83.73.254	10.83.73.255
75	10.83.74.0/24	10.83.74.1 – 10.83.74.254	10.83.74.255
76	10.83.75.0/24	10.83.75.1 – 10.83.75.254	10.83.75.255
77	10.83.76.0/24	10.83.76.1 – 10.83.76.254	10.83.76.255
78	10.83.77.0/24	10.83.77.1 – 10.83.77.254	10.83.77.255
79	10.83.78.0/24	10.83.78.1 – 10.83.78.254	10.83.78.255
80	10.83.79.0/24	10.83.79.1 – 10.83.79.254	10.83.79.255
81	10.83.80.0/24	10.83.80.1 – 10.83.80.254	10.83.80.255
82	10.83.81.0/24	10.83.81.1 – 10.83.81.254	10.83.81.255
83	10.83.82.0/24	10.83.82.1 – 10.83.82.254	10.83.82.255
84	10.83.83.0/24	10.83.83.1 – 10.83.83.254	10.83.83.255
85	10.83.84.0/24	10.83.84.1 – 10.83.84.254	10.83.84.255
86	10.83.85.0/24	10.83.85.1 – 10.83.85.254	10.83.85.255
87	10.83.86.0/24	10.83.86.1 – 10.83.86.254	10.83.86.255
88	10.83.87.0/24	10.83.87.1 – 10.83.87.254	10.83.87.255
89	10.83.88.0/24	10.83.88.1 – 10.83.88.254	10.83.88.255
90	10.83.89.0/24	10.83.89.1 – 10.83.89.254	10.83.89.255
91	10.83.90.0/24	10.83.90.1 – 10.83.90.254	10.83.90.255
92	10.83.91.0/24	10.83.91.1 – 10.83.91.254	10.83.91.255
93	10.83.92.0/24	10.83.92.1 – 10.83.92.254	10.83.92.255
94	10.83.93.0/24	10.83.93.1 – 10.83.93.254	10.83.93.255
95	10.83.94.0/24	10.83.94.1 – 10.83.94.254	10.83.94.255
96	10.83.95.0/24	10.83.95.1 – 10.83.95.254	10.83.95.255
97	10.83.96.0/24	10.83.96.1 – 10.83.96.254	10.83.96.255
98	10.83.97.0/24	10.83.97.1 – 10.83.97.254	10.83.97.255
99	10.83.98.0/24	10.83.98.1 – 10.83.98.254	10.83.98.255
100	10.83.99.0/24	10.83.99.1 – 10.83.99.254	10.83.99.255
101	10.83.100.0/24	10.83.100.1 – 10.83.100.254	10.83.100.255
102	10.83.101.0/24	10.83.101.1 – 10.83.101.254	10.83.101.255
103	10.83.102.0/24	10.83.102.1 – 10.83.102.254	10.83.102.255
104	10.83.103.0/24	10.83.103.1 – 10.83.103.254	10.83.103.255
105	10.83.104.0/24	10.83.104.1 – 10.83.104.254	10.83.104.255
106	10.83.105.0/24	10.83.105.1 – 10.83.105.254	10.83.105.255
107	10.83.106.0/24	10.83.106.1 – 10.83.106.254	10.83.106.255
108	10.83.107.0/24	10.83.107.1 – 10.83.107.254	10.83.107.255
109	10.83.108.0/24	10.83.108.1 – 10.83.108.254	10.83.108.255
110	10.83.109.0/24	10.83.109.1 – 10.83.109.254	10.83.109.255
111	10.83.110.0/24	10.83.110.1 – 10.83.110.254	10.83.110.255
112	10.83.111.0/24	10.83.111.1 – 10.83.111.254	10.83.111.255
113	10.83.112.0/24	10.83.112.1 – 10.83.112.254	10.83.112.255
114	10.83.113.0/24	10.83.113.1 – 10.83.113.254	10.83.113.255
115	10.83.114.0/24	10.83.114.1 – 10.83.114.254	10.83.114.255
116	10.83.115.0/24	10.83.115.1 – 10.83.115.254	10.83.115.255
117	10.83.116.0/24	10.83.116.1 – 10.83.116.254	10.83.116.255
118	10.83.117.0/24	10.83.117.1 – 10.83.117.254	10.83.117.255
119	10.83.118.0/24	10.83.118.1 – 10.83.118.254	10.83.118.255
120	10.83.119.0/24	10.83.119.1 – 10.83.119.254	10.83.119.255
121	10.83.120.0/24	10.83.120.1 – 10.83.120.254	10.83.120.255
122	10.83.121.0/24	10.83.121.1 – 10.83.121.254	10.83.121.255
123	10.83.122.0/24	10.83.122.1 – 10.83.122.254	10.83.122.255
124	10.83.123.0/24	10.83.123.1 – 10.83.123.254	10.83.123.255
125	10.83.124.0/24	10.83.124.1 – 10.83.124.254	10.83.124.255
126	10.83.125.0/24	10.83.125.1 – 10.83.125.254	10.83.125.255
127	10.83.126.0/24	10.83.126.1 – 10.83.126.254	10.83.126.255
128	10.83.127.0/24	10.83.127.1 – 10.83.127.254	10.83.127.255
129	10.83.128.0/24	10.83.128.1 – 10.83.128.254	10.83.128.255
130	10.83.129.0/24	10.83.129.1 – 10.83.129.254	10.83.129.255
131	10.83.130.0/24	10.83.130.1 – 10.83.130.254	10.83.130.255
132	10.83.131.0/24	10.83.131.1 – 10.83.131.254	10.83.131.255
133	10.83.132.0/24	10.83.132.1 – 10.83.132.254	10.83.132.255
134	10.83.133.0/24	10.83.133.1 – 10.83.133.254	10.83.133.255
135	10.83.134.0/24	10.83.134.1 – 10.83.134.254	10.83.134.255
136	10.83.135.0/24	10.83.135.1 – 10.83.135.254	10.83.135.255
137	10.83.136.0/24	10.83.136.1 – 10.83.136.254	10.83.136.255
138	10.83.137.0/24	10.83.137.1 – 10.83.137.254	10.83.137.255
139	10.83.138.0/24	10.83.138.1 – 10.83.138.254	10.83.138.255
140	10.83.139.0/24	10.83.139.1 – 10.83.139.254	10.83.139.255
141	10.83.140.0/24	10.83.140.1 – 10.83.140.254	10.83.140.255
142	10.83.141.0/24	10.83.141.1 – 10.83.141.254	10.83.141.255
143	10.83.142.0/24	10.83.142.1 – 10.83.142.254	10.83.142.255
144	10.83.143.0/24	10.83.143.1 – 10.83.143.254	10.83.143.255
145	10.83.144.0/24	10.83.144.1 – 10.83.144.254	10.83.144.255
146	10.83.145.0/24	10.83.145.1 – 10.83.145.254	10.83.145.255
147	10.83.146.0/24	10.83.146.1 – 10.83.146.254	10.83.146.255
148	10.83.147.0/24	10.83.147.1 – 10.83.147.254	10.83.147.255
149	10.83.148.0/24	10.83.148.1 – 10.83.148.254	10.83.148.255
150	10.83.149.0/24	10.83.149.1 – 10.83.149.254	10.83.149.255
151	10.83.150.0/24	10.83.150.1 – 10.83.150.254	10.83.150.255
152	10.83.151.0/24	10.83.151.1 – 10.83.151.254	10.83.151.255
153	10.83.152.0/24	10.83.152.1 – 10.83.152.254	10.83.152.255
154	10.83.153.0/24	10.83.153.1 – 10.83.153.254	10.83.153.255
155	10.83.154.0/24	10.83.154.1 – 10.83.154.254	10.83.154.255
156	10.83.155.0/24	10.83.155.1 – 10.83.155.254	10.83.155.255
157	10.83.156.0/24	10.83.156.1 – 10.83.156.254	10.83.156.255
158	10.83.157.0/24	10.83.157.1 – 10.83.157.254	10.83.157.255
159	10.83.158.0/24	10.83.158.1 – 10.83.158.254	10.83.158.255
160	10.83.159.0/24	10.83.159.1 – 10.83.159.254	10.83.159.255
161	10.83.160.0/24	10.83.160.1 – 10.83.160.254	10.83.160.255
162	10.83.161.0/24	10.83.161.1 – 10.83.161.254	10.83.161.255
163	10.83.162.0/24	10.83.162.1 – 10.83.162.254	10.83.162.255
164	10.83.163.0/24	10.83.163.1 – 10.83.163.254	10.83.163.255
165	10.83.164.0/24	10.83.164.1 – 10.83.164.254	10.83.164.255
166	10.83.165.0/24	10.83.165.1 – 10.83.165.254	10.83.165.255
167	10.83.166.0/24	10.83.166.1 – 10.83.166.254	10.83.166.255
168	10.83.167.0/24	10.83.167.1 – 10.83.167.254	10.83.167.255
169	10.83.168.0/24	10.83.168.1 – 10.83.168.254	10.83.168.255
170	10.83.169.0/24	10.83.169.1 – 10.83.169.254	10.83.169.255
171	10.83.170.0/24	10.83.170.1 – 10.83.170.254	10.83.170.255
172	10.83.171.0/24	10.83.171.1 – 10.83.171.254	10.83.171.255
173	10.83.172.0/24	10.83.172.1 – 10.83.172.254	10.83.172.255
174	10.83.173.0/24	10.83.173.1 – 10.83.173.254	10.83.173.255
175	10.83.174.0/24	10.83.174.1 – 10.83.174.254	10.83.174.255
176	10.83.175.0/24	10.83.175.1 – 10.83.175.254	10.83.175.255
177	10.83.176.0/24	10.83.176.1 – 10.83.176.254	10.83.176.255
178	10.83.177.0/24	10.83.177.1 – 10.83.177.254	10.83.177.255
179	10.83.178.0/24	10.83.178.1 – 10.83.178.254	10.83.178.255
180	10.83.179.0/24	10.83.179.1 – 10.83.179.254	10.83.179.255
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190	10.83.189.0/24	10.83.189.1 – 10.83.189.254	10.83.189.255
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192	10.83.191.0/24	10.83.191.1 – 10.83.191.254	10.83.191.255
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198	10.83.197.0/24	10.83.197.1 – 10.83.197.254	10.83.197.255
199	10.83.198.0/24	10.83.198.1 – 10.83.198.254	10.83.198.255
200	10.83.199.0/24	10.83.199.1 – 10.83.199.254	10.83.199.255
201	10.83.200.0/24	10.83.200.1 – 10.83.200.254	10.83.200.255
202	10.83.201.0/24	10.83.201.1 – 10.83.201.254	10.83.201.255
203	10.83.202.0/24	10.83.202.1 – 10.83.202.254	10.83.202.255
204	10.83.203.0/24	10.83.203.1 – 10.83.203.254	10.83.203.255
205	10.83.204.0/24	10.83.204.1 – 10.83.204.254	10.83.204.255
206	10.83.205.0/24	10.83.205.1 – 10.83.205.254	10.83.205.255
207	10.83.206.0/24	10.83.206.1 – 10.83.206.254	10.83.206.255
208	10.83.207.0/24	10.83.207.1 – 10.83.207.254	10.83.207.255
209	10.83.208.0/24	10.83.208.1 – 10.83.208.254	10.83.208.255
210	10.83.209.0/24	10.83.209.1 – 10.83.209.254	10.83.209.255
211	10.83.210.0/24	10.83.210.1 – 10.83.210.254	10.83.210.255
212	10.83.211.0/24	10.83.211.1 – 10.83.211.254	10.83.211.255
213	10.83.212.0/24	10.83.212.1 – 10.83.212.254	10.83.212.255
214	10.83.213.0/24	10.83.213.1 – 10.83.213.254	10.83.213.255
215	10.83.214.0/24	10.83.214.1 – 10.83.214.254	10.83.214.255
216	10.83.215.0/24	10.83.215.1 – 10.83.215.254	10.83.215.255
217	10.83.216.0/24	10.83.216.1 – 10.83.216.254	10.83.216.255
218	10.83.217.0/24	10.83.217.1 – 10.83.217.254	10.83.217.255
219	10.83.218.0/24	10.83.218.1 – 10.83.218.254	10.83.218.255
220	10.83.219.0/24	10.83.219.1 – 10.83.219.254	10.83.219.255
221	10.83.220.0/24	10.83.220.1 – 10.83.220.254	10.83.220.255
222	10.83.221.0/24	10.83.221.1 – 10.83.221.254	10.83.221.255
223	10.83.222.0/24	10.83.222.1 – 10.83.222.254	10.83.222.255
224	10.83.223.0/24	10.83.223.1 – 10.83.223.254	10.83.223.255
225	10.83.224.0/24	10.83.224.1 – 10.83.224.254	10.83.224.255
226	10.83.225.0/24	10.83.225.1 – 10.83.225.254	10.83.225.255
227	10.83.226.0/24	10.83.226.1 – 10.83.226.254	10.83.226.255
228	10.83.227.0/24	10.83.227.1 – 10.83.227.254	10.83.227.255
229	10.83.228.0/24	10.83.228.1 – 10.83.228.254	10.83.228.255
230	10.83.229.0/24	10.83.229.1 – 10.83.229.254	10.83.229.255
231	10.83.230.0/24	10.83.230.1 – 10.83.230.254	10.83.230.255
232	10.83.231.0/24	10.83.231.1 – 10.83.231.254	10.83.231.255
233	10.83.232.0/24	10.83.232.1 – 10.83.232.254	10.83.232.255
234	10.83.233.0/24	10.83.233.1 – 10.83.233.254	10.83.233.255
235	10.83.234.0/24	10.83.234.1 – 10.83.234.254	10.83.234.255
236	10.83.235.0/24	10.83.235.1 – 10.83.235.254	10.83.235.255
237	10.83.236.0/24	10.83.236.1 – 10.83.236.254	10.83.236.255
238	10.83.237.0/24	10.83.237.1 – 10.83.237.254	10.83.237.255
239	10.83.238.0/24	10.83.238.1 – 10.83.238.254	10.83.238.255
240	10.83.239.0/24	10.83.239.1 – 10.83.239.254	10.83.239.255
241	10.83.240.0/24	10.83.240.1 – 10.83.240.254	10.83.240.255
242	10.83.241.0/24	10.83.241.1 – 10.83.241.254	10.83.241.255
243	10.83.242.0/24	10.83.242.1 – 10.83.242.254	10.83.242.255
244	10.83.243.0/24	10.83.243.1 – 10.83.243.254	10.83.243.255
245	10.83.244.0/24	10.83.244.1 – 10.83.244.254	10.83.244.255
246	10.83.245.0/24	10.83.245.1 – 10.83.245.254	10.83.245.255
247	10.83.246.0/24	10.83.246.1 – 10.83.246.254	10.83.246.255
248	10.83.247.0/24	10.83.247.1 – 10.83.247.254	10.83.247.255
249	10.83.248.0/24	10.83.248.1 – 10.83.248.254	10.83.248.255
250	10.83.249.0/24	10.83.249.1 – 10.83.249.254	10.83.249.255
251	10.83.250.0/24	10.83.250.1 – 10.83.250.254	10.83.250.255
252	10.83.251.0/24	10.83.251.1 – 10.83.251.254	10.83.251.255
253	10.83.252.0/24	10.83.252.1 – 10.83.252.254	10.83.252.255
254	10.83.253.0/24	10.83.253.1 – 10.83.253.254	10.83.253.255
255	10.83.254.0/24	10.83.254.1 – 10.83.254.254	10.83.254.255
256	10.83.255.0/24	10.83.255.1 – 10.83.255.254	10.83.255.255

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 /16
/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	1
/17	255.255.128.0	32,768	32,766	2 split →
/18	255.255.192.0	16,384	16,382	4 split →
/19	255.255.224.0	8,192	8,190	8 split →
/20	255.255.240.0	4,096	4,094	16 split →
/21	255.255.248.0	2,048	2,046	32 split →
/22	255.255.252.0	1,024	1,022	64 split →
/23	255.255.254.0	512	510	128 split →
/24	255.255.255.0	256	254	256 split →
/25	255.255.255.128	128	126	512 split →
/26	255.255.255.192	64	62	1,024 split →
/27	255.255.255.224	32	30	2,048 split →
/28	255.255.255.240	16	14	4,096 split →
/29	255.255.255.248	8	6	8,192 split →
/30	255.255.255.252	4	2	16,384 split →
/31	255.255.255.254	2	2	32,768 split →
/32	255.255.255.255	1	1	65,536 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 →