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rohan-molloy/isp-bgp-prefix.md

Last active May 30, 2019 15:08
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One Liner To Get ISP announced prefix
Raw
isp-bgp-prefix.md

One Liner To Get ISP announced prefix info

dig +short `curl --silent ipecho.net/plain | awk -F. '{print $4"."$3"." $2"."$1}'`.origin.asn.cymru.com TXT

Example

rohan@vm01:~$ dig +short `curl --silent ipecho.net/plain | awk -F. '{print $4"."$3"." $2"."$1}'`.origin.asn.cymru.com TXT
"46652 | 67.205.128.0/20 | US | arin | 2016-04-12"
rohan@vm01:~$

Extracting out the raw prefix

Here we simply use AWK

dig +short `curl --silent ipecho.net/plain | awk -F. '{print $4"."$3"." $2"."$1}'`.origin.asn.cymru.com TXT | awk '{print $3}'
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