29 Apr
2019
29 Apr
'19
5:16 p.m.
On 4/29/19 3:13 PM, Eric Kuhnke wrote:
I would caution against putting much faith in the validity of geolocation or site ID by reverse DNS PTR records. There are a vast number of unmaintained, ancient, stale, erroneous or wildly wrong PTR records out there. I can name at least a half dozen ISPs that have absorbed other ASes, some of those which also acquired other ASes earlier in their history, forming a turducken of obsolete PTR records that has things with ISP domain names last in use in the year 2002.
I still see references to UUNet in some reverse PTRs. So, uh, yeah.