Geographic Locality

Mapping addresses to locations is Very Hard

LOC records in DNS
caida.org. 14400 LOC 32 53 01.000 N 117 14 25.000 W 107.00m 30.00m 10.00m 10.00m

Easy, but not always accurate
IN-ADDR better than forward domains
Not widely used

Intelligent guesswork based on DNS names
                atm6-0-2-622M.lax-bb4.cerf.net
                cs-atm0-0-22.dnj.vbns.net

Don't know which end of link name refers to
This matters for a transcontinental link!
Location codes not standardized
Is SCL in silicon valley or Chile?