Yesterday there was a slight problem on the office network. IP blocks for upstream B was passed from upstream A. Once the problem is finished, it’s fun to see record ASN from the internet provider company here: http://bgp.he.net/AS7713 (7713 is the U.S. from Telkom)
I’m curios who’s Google peering with? Finally a little Googling found this link, from IP to ASN http://www.team-cymru.org/Services/ip-to-asn.html Finding ASN from IP Address, turned out quite easily.
First we search first one ip from Google. We use the command ‘host www.google.com’ It would appear many ip, I Choose 72.14.213.147, then we use whois command:
whois -h -v whois.cymru.com 72.14.213.103
The result is as below
Warning: RIPE flags Used with a traditional server. AS |IP | BGP Prefix | CC | Registry | Allocated | U.S. Name 15169|72.14.213.103 | 72.14.212.0/23 | U.S. | ARIN | 2004-11-10 | GOOGLE - Google Inc..
Left column is Google’s ASN. We enter into his looking glass HE.net so it looks like: http://bgp.he.net/AS15169
Please see BGP peering and statistics from Google.
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