Relation between IP address and AS Number

2018-06-23 11:15:32

What is the relation between IP addresses and AS Numbers (Autonomous Sytems Number)? Is there a mapping somewhere?

For eg:- If my ipconfig looks like

Connection-specific DNS Suffix . : XXXX.YYY.edu

Link-local IPv6 Address . . . . . : fe80::989f:1084:e738:41d8p6

IPv4 Address. . . . . . . . . . . : 10.103.19.216

Subnet Mask . . . . . . . . . . . : 255.255.252.0

Default Gateway . . . . . . . . . : 10.103.16.11

Can anyone decipher which AS am I on?

There are online databases like the one of the ARIN. Simply enter an IP address.

Or you can do a whois on the IP address yourself, and will usually find the AS number in a field like origin or OriginAS .

For example: Determining the primary IP address of Stack Overflow, and looking for the AS it belongs to:

$ dig -t A stackoverflow.com | grep -v -e '^;' -e '^$'
stackoverflow.com.      291     IN      A       198.252.206.16

$ whois 198.252.206.16 | grep -i origin
OriginAS:       AS25791

链接地址: http://www.djcxy.com/p/65800.html

上一篇: 图像不显示在JasperReports服务器上

下一篇: IP地址和AS号码之间的关系