WorldIP - IP Geolocation, Internet Research

Thanks to Craig MacKenna, there is the module IP::World for WorldIP base in CPAN.
Today it is the fastest module for access to IP database. At Athlon64 2.4GHz are 236K req/sec; XEON E5405 2Ghz - 267K req/sec
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Configuration and use of the database (CIDR) are very practical and comfortable in nginx, so there is no problem to install it
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The table worldip contains fields start, end and code. Every row means a network. start and end are integer fields with IP numbers, code is a double-character country code, like "US".
You can convert every IP address to IP number with following formula
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