# whois -h whois.radb.net '!gAS15169'
輸出的結果是 BGP announce 的網段, 可以再用 netmask summary
# netmask `whois -h whois.radb.net '!gAS15169' | grep '^[0-9]'`
1.0.0.0/24
1.1.1.0/24
1.2.3.0/24
8.8.4.0/24
8.8.8.0/24
8.15.202.0/24
8.34.208.0/20
8.35.192.0/20
23.236.48.0/20
23.251.128.0/19
64.15.112.0/20
64.233.160.0/19
66.102.0.0/20
66.249.64.0/19
70.32.128.0/19
72.14.192.0/18
74.125.0.0/16
104.132.0.0/16
104.133.0.0/17
104.134.128.0/17
104.154.0.0/15
104.196.0.0/14
107.167.160.0/19
107.178.192.0/18
108.59.80.0/20
108.170.192.0/18
108.177.0.0/17
113.197.106.0/24
130.211.0.0/16
142.250.0.0/15
146.148.0.0/17
162.216.148.0/22
162.222.176.0/21
172.102.8.0/21
172.110.32.0/21
172.217.0.0/16
172.253.0.0/16
173.194.0.0/16
173.255.112.0/20
192.104.160.0/23
192.158.28.0/22
192.178.0.0/15
193.142.125.0/24
194.110.194.0/24
199.192.112.0/22
199.223.232.0/21
207.223.160.0/20
208.65.152.0/22
208.117.224.0/19
209.85.128.0/17
216.58.192.0/19
216.239.32.0/19
216.252.220.0/22
