Autonomous System Number Lookupby IP Address (BASH Script)

Autonomous System Number Lookup by IP Address

Dependencies

1. Whois

   sudo apt -y install whois

Create and Install

1. Create bash script:
   nano aslookup.sh

2. Insert code
   #!/bin/bash
whois -h whois.cymru.com -v $1

3. Save
   ctrl+o ENTER

4. Change the access permissions
   sudo chmod +x aslookup.sh

5. Installation
   cp aslookup.sh /usr/bin/aslookup

How to use

Command:
aslookup 8.8.8.8

Result:

AS      | IP               | BGP Prefix          | CC | Registry | Allocated  | AS Name
15169   | 8.8.8.8          | 8.8.8.0/24          | US | arin     | 1992-12-01 | GOOGLE, US