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  Your ip: 184.73.21.101      AMAZON-EC2-7     AS14618     
United States  
  Details...    Login    110 

Announced prefixes in block
20.0.0.0 - 20.255.255.255

Net block: 20.0.0.0 - 20.255.255.255
Block name:CSC
Block size:16777216
Domains in block
Organization:Computer Sciences Corporation
Parent block:
US, United States, Falls Church


Updated: 2017.01.18

Prefixes

N AS Prefix D Block start End of block Size
unannounced 20.0.0.0 20.32.175.255 2142208
1 AS50207  20.32.176.0/20
20.32.176.0 20.32.191.255 4096
unannounced 20.32.192.0 20.131.255.255 6504448
2 AS21877  20.132.0.0/20
20.132.0.0 20.132.15.255 4096
3 AS21877
 20.132.1.0/24
20.132.1.0 20.132.1.255 256
4 AS21877
 20.132.2.64/26
20.132.2.64 20.132.2.127 64
unannounced 20.132.16.0 20.132.47.255 8192
5 AS206  20.132.48.0/20
20.132.48.0 20.132.63.255 4096
6 AS206  20.132.64.0/20
20.132.64.0 20.132.79.255 4096
7 AS206  20.132.80.0/24
20.132.80.0 20.132.80.255 256
unannounced 20.132.81.0 20.132.159.255 20224
8 AS206  20.132.160.0/20
20.132.160.0 20.132.175.255 4096
9 AS11271  20.132.176.0/20
20.132.176.0 20.132.191.255 4096
10 AS206
 20.132.176.0/20
20.132.176.0 20.132.191.255 4096
unannounced 20.132.192.0 20.132.224.255 8448
11 AS206  20.132.225.0/24
20.132.225.0 20.132.225.255 256
unannounced 20.132.226.0 20.132.227.255 512
12 AS206  20.132.228.0/24
20.132.228.0 20.132.228.255 256
13 AS206  20.132.229.0/24
20.132.229.0 20.132.229.255 256
14 AS21877  20.132.230.0/24
20.132.230.0 20.132.230.255 256
15 AS11271  20.132.231.0/24
20.132.231.0 20.132.231.255 256
16 AS206
 20.132.231.0/24
20.132.231.0 20.132.231.255 256
unannounced 20.132.232.0 20.132.242.255 2816
17 AS206  20.132.243.0/24
20.132.243.0 20.132.243.255 256
unannounced 20.132.244.0 20.132.244.255 256
18 AS206  20.132.245.0/24
20.132.245.0 20.132.245.255 256
19 AS206  20.132.246.0/24
20.132.246.0 20.132.246.255 256
20 AS21877  20.132.247.0/24
20.132.247.0 20.132.247.255 256
21 AS11271  20.132.248.0/24
20.132.248.0 20.132.248.255 256
22 AS206
 20.132.248.0/24
20.132.248.0 20.132.248.255 256
23 AS206  20.132.249.0/24
20.132.249.0 20.132.249.255 256
unannounced 20.132.250.0 20.132.255.255 1536
24 AS22562  20.133.0.0/20
20.133.0.0 20.133.15.255 4096
25 AS22562
 20.133.0.0/21
20.133.0.0 20.133.7.255 2048
26 AS22562
 20.133.8.0/21
20.133.8.0 20.133.15.255 2048
27 AS22562
 20.133.14.0/24
20.133.14.0 20.133.14.255 256
28 AS5624  20.133.16.0/20
20.133.16.0 20.133.31.255 4096
29 AS22562  20.133.32.0/21
20.133.32.0 20.133.39.255 2048
30 AS22562  20.133.40.0/21
20.133.40.0 20.133.47.255 2048
31 AS17916
 20.133.40.0/22
20.133.40.0 20.133.43.255 1024
unannounced 20.133.48.0 20.133.63.255 4096
32 AS50207  20.133.64.0/20
20.133.64.0 20.133.79.255 4096
unannounced 20.133.80.0 20.133.231.255 38912
33 AS5624  20.133.232.0/24
20.133.232.0 20.133.232.255 256
34 AS22562  20.133.233.0/24
20.133.233.0 20.133.233.255 256
35 AS22562  20.133.234.0/24
20.133.234.0 20.133.234.255 256
unannounced 20.133.235.0 20.133.240.255 1536
36 AS5624  20.133.241.0/24
20.133.241.0 20.133.241.255 256
37 AS22562  20.133.242.0/24
20.133.242.0 20.133.242.255 256
unannounced 20.133.243.0 20.133.243.255 256
38 AS22562  20.133.244.0/24
20.133.244.0 20.133.244.255 256
unannounced 20.133.245.0 20.133.255.255 2816
39 AS17647  20.134.0.0/20
20.134.0.0 20.134.15.255 4096
40 AS17916  20.134.16.0/20
20.134.16.0 20.134.31.255 4096
41 AS17916  20.134.32.0/20
20.134.32.0 20.134.47.255 4096
42 AS17916  20.134.48.0/20
20.134.48.0 20.134.63.255 4096
43 AS17916  20.134.64.0/20
20.134.64.0 20.134.79.255 4096
44 AS17916
 20.134.64.0/24
20.134.64.0 20.134.64.255 256
45 AS17916  20.134.80.0/20
20.134.80.0 20.134.95.255 4096
unannounced 20.134.96.0 20.134.111.255 4096
46 AS17647  20.134.112.0/20
20.134.112.0 20.134.127.255 4096
unannounced 20.134.128.0 20.134.143.255 4096
47 AS17916  20.134.144.0/20
20.134.144.0 20.134.159.255 4096
48 AS17916  20.134.160.0/20
20.134.160.0 20.134.175.255 4096
49 AS17916  20.134.176.0/21
20.134.176.0 20.134.183.255 2048
50 AS17916  20.134.184.0/21
20.134.184.0 20.134.191.255 2048
51 AS17647  20.134.192.0/21
20.134.192.0 20.134.199.255 2048
unannounced 20.134.200.0 20.134.207.255 2048
52 AS17916  20.134.208.0/24
20.134.208.0 20.134.208.255 256
53 AS17916  20.134.209.0/24
20.134.209.0 20.134.209.255 256
54 AS17916  20.134.210.0/24
20.134.210.0 20.134.210.255 256
55 AS17916  20.134.211.0/24
20.134.211.0 20.134.211.255 256
56 AS17647  20.134.212.0/24
20.134.212.0 20.134.212.255 256
57 AS17916  20.134.213.0/24
20.134.213.0 20.134.213.255 256
unannounced 20.134.214.0 20.134.223.255 2560
58 AS17916  20.134.224.0/20
20.134.224.0 20.134.239.255 4096
59 AS17916  20.134.240.0/21
20.134.240.0 20.134.247.255 2048
60 AS17916
 20.134.241.0/24
20.134.241.0 20.134.241.255 256
61 AS17916
 20.134.242.0/24
20.134.242.0 20.134.242.255 256
62 AS17916
 20.134.243.0/24
20.134.243.0 20.134.243.255 256
63 AS17916
 20.134.244.0/24
20.134.244.0 20.134.244.255 256
64 AS17916
 20.134.245.0/24
20.134.245.0 20.134.245.255 256
65 AS17916
 20.134.246.0/24
20.134.246.0 20.134.246.255 256
66 AS17916
 20.134.247.0/24
20.134.247.0 20.134.247.255 256
67 AS17916  20.134.248.0/24
20.134.248.0 20.134.248.255 256
68 AS17647  20.134.249.0/24
20.134.249.0 20.134.249.255 256
69 AS17916  20.134.250.0/24
20.134.250.0 20.134.250.255 256
unannounced 20.134.251.0 20.136.255.255 132352
70 AS21877  20.137.0.0/21
20.137.0.0 20.137.7.255 2048
71 AS206  20.137.8.0/22
20.137.8.0 20.137.11.255 1024
72 AS206
 20.137.10.0/24
20.137.10.0 20.137.10.255 256
73 AS4237  20.137.12.0/22
20.137.12.0 20.137.15.255 1024
unannounced 20.137.16.0 20.137.47.255 8192
74 AS206  20.137.48.0/20
20.137.48.0 20.137.63.255 4096
75 AS206  20.137.64.0/20
20.137.64.0 20.137.79.255 4096
unannounced 20.137.80.0 20.137.159.255 20480
76 AS206  20.137.160.0/20
20.137.160.0 20.137.175.255 4096
77 AS21877  20.137.176.0/21
20.137.176.0 20.137.183.255 2048
78 AS21877  20.137.184.0/21
20.137.184.0 20.137.191.255 2048
79 AS10859
 20.137.189.0/24
20.137.189.0 20.137.189.255 256
80 AS206  20.137.192.0/20
20.137.192.0 20.137.207.255 4096
unannounced 20.137.208.0 20.137.209.255 512
81 AS4237  20.137.210.0/24
20.137.210.0 20.137.210.255 256
unannounced 20.137.211.0 20.137.211.255 256
82 AS4237  20.137.212.0/24
20.137.212.0 20.137.212.255 256
unannounced 20.137.213.0 20.137.215.255 768
83 AS4237  20.137.216.0/24
20.137.216.0 20.137.216.255 256
unannounced 20.137.217.0 20.137.220.255 1024
84 AS10859  20.137.221.0/24
20.137.221.0 20.137.221.255 256
85 AS4237  20.137.222.0/24
20.137.222.0 20.137.222.255 256
unannounced 20.137.223.0 20.137.239.255 4352
86 AS21877  20.137.240.0/20
20.137.240.0 20.137.255.255 4096
87 AS22562  20.138.0.0/22
20.138.0.0 20.138.3.255 1024
88 AS4237
 20.138.0.0/23
20.138.0.0 20.138.1.255 512
89 AS4237
 20.138.2.0/23
20.138.2.0 20.138.3.255 512
unannounced 20.138.4.0 20.138.15.255 3072
90 AS5624  20.138.16.0/20
20.138.16.0 20.138.31.255 4096
91 AS22562  20.138.32.0/21
20.138.32.0 20.138.39.255 2048
unannounced 20.138.40.0 20.138.47.255 2048
92 AS22562  20.138.48.0/20
20.138.48.0 20.138.63.255 4096
93 AS4237
 20.138.48.0/21
20.138.48.0 20.138.55.255 2048
94 AS4237
 20.138.56.0/21
20.138.56.0 20.138.63.255 2048
unannounced 20.138.64.0 20.138.223.255 40960
95 AS22562  20.138.224.0/19
20.138.224.0 20.138.255.255 8192
96 AS22562
 20.138.224.0/20
20.138.224.0 20.138.239.255 4096
97 AS22562
 20.138.240.0/20
20.138.240.0 20.138.255.255 4096
98 AS17647  20.139.0.0/21
20.139.0.0 20.139.7.255 2048
99 AS4237  20.139.8.0/22
20.139.8.0 20.139.11.255 1024
100 AS17916  20.139.12.0/22
20.139.12.0 20.139.15.255 1024
101 AS17916  20.139.16.0/20
20.139.16.0 20.139.31.255 4096
102 AS17916  20.139.32.0/20
20.139.32.0 20.139.47.255 4096
103 AS17916  20.139.48.0/20
20.139.48.0 20.139.63.255 4096
104 AS17916  20.139.64.0/20
20.139.64.0 20.139.79.255 4096
105 AS4237
 20.139.64.0/21
20.139.64.0 20.139.71.255 2048
106 AS4237
 20.139.72.0/21
20.139.72.0 20.139.79.255 2048
107 AS17916  20.139.80.0/20
20.139.80.0 20.139.95.255 4096
108 AS4237
 20.139.80.0/21
20.139.80.0 20.139.87.255 2048
109 AS4237
 20.139.88.0/21
20.139.88.0 20.139.95.255 2048
110 AS17647  20.139.96.0/20
20.139.96.0 20.139.111.255 4096
unannounced 20.139.112.0 20.139.143.255 8192
111 AS17916  20.139.144.0/20
20.139.144.0 20.139.159.255 4096
112 AS4237
 20.139.144.0/21
20.139.144.0 20.139.151.255 2048
113 AS4237
 20.139.148.0/24
20.139.148.0 20.139.148.255 256
114 AS17916  20.139.160.0/20
20.139.160.0 20.139.175.255 4096
unannounced 20.139.176.0 20.139.191.255 4096
115 AS17916  20.139.192.0/18
20.139.192.0 20.139.255.255 16384
116 AS4237
 20.139.217.0/24
20.139.217.0 20.139.217.255 256
unannounced 20.140.0.0 20.142.31.255 139264
117 AS17020  20.142.32.0/23
20.142.32.0 20.142.33.255 512
unannounced 20.142.34.0 20.142.119.255 22016
118 AS17916  20.142.120.0/22
20.142.120.0 20.142.123.255 1024
unannounced 20.142.124.0 20.143.207.255 87040
119 AS17647  20.143.208.0/20
20.143.208.0 20.143.223.255 4096
unannounced 20.143.224.0 20.143.239.255 4096
120 AS4755  20.143.240.0/24
20.143.240.0 20.143.240.255 256
121 AS4755  20.143.241.0/24
20.143.241.0 20.143.241.255 256
unannounced 20.143.242.0 20.147.255.255 265728
122 AS11271  20.148.0.0/20
20.148.0.0 20.148.15.255 4096
123 AS206
 20.148.0.0/20
20.148.0.0 20.148.15.255 4096
124 AS4237  20.148.16.0/24
20.148.16.0 20.148.16.255 256
unannounced 20.148.17.0 20.148.31.255 3840
125 AS21877  20.148.32.0/19
20.148.32.0 20.148.63.255 8192
126 AS4237  20.148.64.0/20
20.148.64.0 20.148.79.255 4096
127 AS4237  20.148.80.0/20
20.148.80.0 20.148.95.255 4096
128 AS4237  20.148.96.0/19
20.148.96.0 20.148.127.255 8192
129 AS4237  20.148.128.0/19
20.148.128.0 20.148.159.255 8192
130 AS21877
 20.148.128.0/19
20.148.128.0 20.148.159.255 8192
131 AS4237
 20.148.128.0/21
20.148.128.0 20.148.135.255 2048
132 AS21877
 20.148.136.0/21
20.148.136.0 20.148.143.255 2048
133 AS4237
 20.148.144.0/20
20.148.144.0 20.148.159.255 4096
134 AS4237  20.148.160.0/19
20.148.160.0 20.148.191.255 8192
135 AS4237  20.148.192.0/20
20.148.192.0 20.148.207.255 4096
unannounced 20.148.208.0 20.148.223.255 4096
136 AS4237  20.148.224.0/20
20.148.224.0 20.148.239.255 4096
137 AS4237  20.148.240.0/20
20.148.240.0 20.148.255.255 4096
138 AS22562  20.149.0.0/20
20.149.0.0 20.149.15.255 4096
139 AS4237
 20.149.0.0/21
20.149.0.0 20.149.7.255 2048
140 AS22562
 20.149.8.0/21
20.149.8.0 20.149.15.255 2048
unannounced 20.149.16.0 20.149.31.255 4096
141 AS22562  20.149.32.0/20
20.149.32.0 20.149.47.255 4096
142 AS4237
 20.149.32.0/21
20.149.32.0 20.149.39.255 2048
143 AS4237
 20.149.40.0/21
20.149.40.0 20.149.47.255 2048
144 AS22562  20.149.48.0/20
20.149.48.0 20.149.63.255 4096
unannounced 20.149.64.0 20.154.65.255 328192
145 AS28857  20.154.66.0/23
20.154.66.0 20.154.67.255 512
unannounced 20.154.68.0 20.154.72.255 1280
146 AS1764  20.154.73.0/24
20.154.73.0 20.154.73.255 256
unannounced 20.154.74.0 20.155.31.255 54784
147 AS50207  20.155.32.0/20
20.155.32.0 20.155.47.255 4096
148 AS15917  20.155.48.0/20
20.155.48.0 20.155.63.255 4096
149 AS15917  20.155.64.0/20
20.155.64.0 20.155.79.255 4096
150 AS5624  20.155.80.0/21
20.155.80.0 20.155.87.255 2048
151 AS5624  20.155.88.0/21
20.155.88.0 20.155.95.255 2048
unannounced 20.155.96.0 20.156.99.255 66560
152 AS133486  20.156.100.0/22
20.156.100.0 20.156.103.255 1024
unannounced 20.156.104.0 20.156.168.255 16640
153 AS4237  20.156.169.0/24
20.156.169.0 20.156.169.255 256
unannounced 20.156.170.0 20.255.255.255 6510080

  Announced ip addresses: 294144 (1.75 %)
  Unannounced ip addresses: 16483072 (98.25 %)

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