We recently went through this exercise when we got new subnets off Apnic. Its not much fun. The large commercial websites (ondemand, trademe, tv3, isky) seem to mostly get their geolocation information from the www.maxmind.com database, so first point of call is to check where maxmind currently has your IPs located (ours were recycled from India)
Eg. http://www.maxmind.com/app/locate_demo_ip?ips=202.3.89.2
You can try and get Maxmind to update their database by sending an email to corrections(a)maxmind.com, but they are terrible at actioning the corrections and only seem to update the database once a month.
Good luck!
Cameron Bendall
Product Manager - Data Services
Digital Island Limited
T: 0800 999 010 | P: +64 9 631 1362 | M: +64 27 7007 911 | F: 0800 999 020 | www.digitalisland.co.nz
Lvl 3, 8 Nugent St, Grafton, PO box 8560, Symonds St, Auckland, NZ
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