Berechnung kann analog zur Wiki gemacht werden, nur dass du hier ein ClassB gliedern sollst.
Ausgangslage:
153.1.0.0/16 (entspräche untenstehender Subnetmask)
Subnetmaske: 255.255.0.0
Auflage: mindestens 60 Hosts pro Subnetz
Anzahl Bits Subnetmask: 23
Anzahl Bits Host ID: 9
Subnetting Bits: 7
Anzahl möglicher Subnetze: 128
max. Hosts per Subnetz: 510
Code:
Nr NetzwerkID RangeAnfang RangeEnde Broadcast
1 153.1.0.0 153.1.0.1 153.1.1.254 153.1.1.255
2 153.1.2.0 153.1.2.1 153.1.3.254 153.1.3.255
3 153.1.4.0 153.1.4.1 153.1.5.254 153.1.5.255
4 153.1.6.0 153.1.6.1 153.1.7.254 153.1.7.255
5 153.1.8.0 153.1.8.1 153.1.9.254 153.1.9.255
6 153.1.10.0 153.1.10.1 153.1.11.254 153.1.11.255
7 153.1.12.0 153.1.12.1 153.1.13.254 153.1.13.255
8 153.1.14.0 153.1.14.1 153.1.15.254 153.1.15.255
9 153.1.16.0 153.1.16.1 153.1.17.254 153.1.17.255
10 153.1.18.0 153.1.18.1 153.1.19.254 153.1.19.255
11 153.1.20.0 153.1.20.1 153.1.21.254 153.1.21.255
12 153.1.22.0 153.1.22.1 153.1.23.254 153.1.23.255
13 153.1.24.0 153.1.24.1 153.1.25.254 153.1.25.255
14 153.1.26.0 153.1.26.1 153.1.27.254 153.1.27.255
15 153.1.28.0 153.1.28.1 153.1.29.254 153.1.29.255
16 153.1.30.0 153.1.30.1 153.1.31.254 153.1.31.255
17 153.1.32.0 153.1.32.1 153.1.33.254 153.1.33.255
18 153.1.34.0 153.1.34.1 153.1.35.254 153.1.35.255
19 153.1.36.0 153.1.36.1 153.1.37.254 153.1.37.255
20 153.1.38.0 153.1.38.1 153.1.39.254 153.1.39.255
21 153.1.40.0 153.1.40.1 153.1.41.254 153.1.41.255
22 153.1.42.0 153.1.42.1 153.1.43.254 153.1.43.255
23 153.1.44.0 153.1.44.1 153.1.45.254 153.1.45.255
24 153.1.46.0 153.1.46.1 153.1.47.254 153.1.47.255
25 153.1.48.0 153.1.48.1 153.1.49.254 153.1.49.255
26 153.1.50.0 153.1.50.1 153.1.51.254 153.1.51.255
27 153.1.52.0 153.1.52.1 153.1.53.254 153.1.53.255
28 153.1.54.0 153.1.54.1 153.1.55.254 153.1.55.255
29 153.1.56.0 153.1.56.1 153.1.57.254 153.1.57.255
30 153.1.58.0 153.1.58.1 153.1.59.254 153.1.59.255
31 153.1.60.0 153.1.60.1 153.1.61.254 153.1.61.255
32 153.1.62.0 153.1.62.1 153.1.63.254 153.1.63.255
33 153.1.64.0 153.1.64.1 153.1.65.254 153.1.65.255
34 153.1.66.0 153.1.66.1 153.1.67.254 153.1.67.255
35 153.1.68.0 153.1.68.1 153.1.69.254 153.1.69.255
36 153.1.70.0 153.1.70.1 153.1.71.254 153.1.71.255
37 153.1.72.0 153.1.72.1 153.1.73.254 153.1.73.255
38 153.1.74.0 153.1.74.1 153.1.75.254 153.1.75.255
39 153.1.76.0 153.1.76.1 153.1.77.254 153.1.77.255
40 153.1.78.0 153.1.78.1 153.1.79.254 153.1.79.255
41 153.1.80.0 153.1.80.1 153.1.81.254 153.1.81.255
42 153.1.82.0 153.1.82.1 153.1.83.254 153.1.83.255
43 153.1.84.0 153.1.84.1 153.1.85.254 153.1.85.255
44 153.1.86.0 153.1.86.1 153.1.87.254 153.1.87.255
45 153.1.88.0 153.1.88.1 153.1.89.254 153.1.89.255
46 153.1.90.0 153.1.90.1 153.1.91.254 153.1.91.255
47 153.1.92.0 153.1.92.1 153.1.93.254 153.1.93.255
48 153.1.94.0 153.1.94.1 153.1.95.254 153.1.95.255
49 153.1.96.0 153.1.96.1 153.1.97.254 153.1.97.255
50 153.1.98.0 153.1.98.1 153.1.99.254 153.1.99.255
51 153.1.100.0 153.1.100.1 153.1.101.254 153.1.101.255
52 153.1.102.0 153.1.102.1 153.1.103.254 153.1.103.255
53 153.1.104.0 153.1.104.1 153.1.105.254 153.1.105.255
54 153.1.106.0 153.1.106.1 153.1.107.254 153.1.107.255
55 153.1.108.0 153.1.108.1 153.1.109.254 153.1.109.255
56 153.1.110.0 153.1.110.1 153.1.111.254 153.1.111.255
57 153.1.112.0 153.1.112.1 153.1.113.254 153.1.113.255
58 153.1.114.0 153.1.114.1 153.1.115.254 153.1.115.255
59 153.1.116.0 153.1.116.1 153.1.117.254 153.1.117.255
60 153.1.118.0 153.1.118.1 153.1.119.254 153.1.119.255
61 153.1.120.0 153.1.120.1 153.1.121.254 153.1.121.255
62 153.1.122.0 153.1.122.1 153.1.123.254 153.1.123.255
63 153.1.124.0 153.1.124.1 153.1.125.254 153.1.125.255
64 153.1.126.0 153.1.126.1 153.1.127.254 153.1.127.255
65 153.1.128.0 153.1.128.1 153.1.129.254 153.1.129.255
66 153.1.130.0 153.1.130.1 153.1.131.254 153.1.131.255
67 153.1.132.0 153.1.132.1 153.1.133.254 153.1.133.255
68 153.1.134.0 153.1.134.1 153.1.135.254 153.1.135.255
69 153.1.136.0 153.1.136.1 153.1.137.254 153.1.137.255
70 153.1.138.0 153.1.138.1 153.1.139.254 153.1.139.255
71 153.1.140.0 153.1.140.1 153.1.141.254 153.1.141.255
72 153.1.142.0 153.1.142.1 153.1.143.254 153.1.143.255
73 153.1.144.0 153.1.144.1 153.1.145.254 153.1.145.255
74 153.1.146.0 153.1.146.1 153.1.147.254 153.1.147.255
75 153.1.148.0 153.1.148.1 153.1.149.254 153.1.149.255
76 153.1.150.0 153.1.150.1 153.1.151.254 153.1.151.255
77 153.1.152.0 153.1.152.1 153.1.153.254 153.1.153.255
78 153.1.154.0 153.1.154.1 153.1.155.254 153.1.155.255
79 153.1.156.0 153.1.156.1 153.1.157.254 153.1.157.255
80 153.1.158.0 153.1.158.1 153.1.159.254 153.1.159.255
81 153.1.160.0 153.1.160.1 153.1.161.254 153.1.161.255
82 153.1.162.0 153.1.162.1 153.1.163.254 153.1.163.255
83 153.1.164.0 153.1.164.1 153.1.165.254 153.1.165.255
84 153.1.166.0 153.1.166.1 153.1.167.254 153.1.167.255
85 153.1.168.0 153.1.168.1 153.1.169.254 153.1.169.255
86 153.1.170.0 153.1.170.1 153.1.171.254 153.1.171.255
87 153.1.172.0 153.1.172.1 153.1.173.254 153.1.173.255
88 153.1.174.0 153.1.174.1 153.1.175.254 153.1.175.255
89 153.1.176.0 153.1.176.1 153.1.177.254 153.1.177.255
90 153.1.178.0 153.1.178.1 153.1.179.254 153.1.179.255
91 153.1.180.0 153.1.180.1 153.1.181.254 153.1.181.255
92 153.1.182.0 153.1.182.1 153.1.183.254 153.1.183.255
93 153.1.184.0 153.1.184.1 153.1.185.254 153.1.185.255
94 153.1.186.0 153.1.186.1 153.1.187.254 153.1.187.255
95 153.1.188.0 153.1.188.1 153.1.189.254 153.1.189.255
96 153.1.190.0 153.1.190.1 153.1.191.254 153.1.191.255
97 153.1.192.0 153.1.192.1 153.1.193.254 153.1.193.255
98 153.1.194.0 153.1.194.1 153.1.195.254 153.1.195.255
99 153.1.196.0 153.1.196.1 153.1.197.254 153.1.197.255
100 153.1.198.0 153.1.198.1 153.1.199.254 153.1.199.255
101 153.1.200.0 153.1.200.1 153.1.201.254 153.1.201.255
102 153.1.202.0 153.1.202.1 153.1.203.254 153.1.203.255
103 153.1.204.0 153.1.204.1 153.1.205.254 153.1.205.255
104 153.1.206.0 153.1.206.1 153.1.207.254 153.1.207.255
105 153.1.208.0 153.1.208.1 153.1.209.254 153.1.209.255
106 153.1.210.0 153.1.210.1 153.1.211.254 153.1.211.255
107 153.1.212.0 153.1.212.1 153.1.213.254 153.1.213.255
108 153.1.214.0 153.1.214.1 153.1.215.254 153.1.215.255
109 153.1.216.0 153.1.216.1 153.1.217.254 153.1.217.255
110 153.1.218.0 153.1.218.1 153.1.219.254 153.1.219.255
111 153.1.220.0 153.1.220.1 153.1.221.254 153.1.221.255
112 153.1.222.0 153.1.222.1 153.1.223.254 153.1.223.255
113 153.1.224.0 153.1.224.1 153.1.225.254 153.1.225.255
114 153.1.226.0 153.1.226.1 153.1.227.254 153.1.227.255
115 153.1.228.0 153.1.228.1 153.1.229.254 153.1.229.255
116 153.1.230.0 153.1.230.1 153.1.231.254 153.1.231.255
117 153.1.232.0 153.1.232.1 153.1.233.254 153.1.233.255
118 153.1.234.0 153.1.234.1 153.1.235.254 153.1.235.255
119 153.1.236.0 153.1.236.1 153.1.237.254 153.1.237.255
120 153.1.238.0 153.1.238.1 153.1.239.254 153.1.239.255
121 153.1.240.0 153.1.240.1 153.1.241.254 153.1.241.255
122 153.1.242.0 153.1.242.1 153.1.243.254 153.1.243.255
123 153.1.244.0 153.1.244.1 153.1.245.254 153.1.245.255
124 153.1.246.0 153.1.246.1 153.1.247.254 153.1.247.255
125 153.1.248.0 153.1.248.1 153.1.249.254 153.1.249.255
126 153.1.250.0 153.1.250.1 153.1.251.254 153.1.251.255
127 153.1.252.0 153.1.252.1 153.1.253.254 153.1.253.255
128 153.1.254.0 153.1.254.1 153.1.255.254 153.1.255.255
Zur CIDR-Schreibweise ziehst du die HostID-Bits von den 32bit IP-Länge ab.
32-9=23
also 153.1.0.0/23
lt. CIDR-Tabelle
Notation|Hosts |Subnetzmaske
...|...|...
/23 |2x256 |255.255.254.0
...|...|...
Subnetmaske: 255.255.254.0