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IP::Country(3)	      User Contributed Perl Documentation	IP::Country(3)

NAME
       IP::Country - fast lookup of country codes from IP addresses

SYNOPSIS
	 use IP::Country::Fast;
	 my $reg = IP::Country::Fast->new();
	 print $reg->inet_atocc('212.67.197.128')   ."\n";
	 print $reg->inet_atocc('www.slashdot.org') ."\n";
	 print $reg->db_time() ."\n"; #	revision date

DESCRIPTION
       Finding the home	country	of a client using only the IP address can be
       difficult.  Looking up the domain name associated with that address can
       provide some help, but many IP address are not reverse mapped to	any
       useful domain, and the most common domain (.com)	offers no help when
       looking for country.

       This module comes bundled with a	database of countries where various IP
       addresses have been assigned. Although the country of assignment	will
       probably	be the country associated with a large ISP rather than the
       client herself, this is probably	good enough for	most log analysis
       applications, and under test has	proved to be as	accurate as reverse-
       DNS and WHOIS lookup.

CONSTRUCTOR
       The constructor takes no	arguments.

	 use IP::Country::Fast;
	 my $reg = IP::Country::Fast->new();

OBJECT METHODS
       All object methods are designed to be used in an	object-oriented
       fashion.

	 $result = $object->foo_method($bar,$baz);

       Using the module	in a procedural	fashion	(without the arrow syntax)
       won't work.

       $cc = $reg->inet_atocc(HOSTNAME)
	   Takes a string giving the name of a host, and translates that to an
	   two-letter country code. Takes arguments of both the	'rtfm.mit.edu'
	   type	and '18.181.0.24'. If the host name cannot be resolved,
	   returns undef.  If the resolved IP address is not contained within
	   the database, returns undef.	 For multi-homed hosts (hosts with
	   more	than one address), the first address found is returned.	For
	   private Internet addresses (see RFC1918), returns two asterisks
	   '**'.

       $cc = $reg->inet_ntocc(IP_ADDRESS)
	   Takes a string (an opaque string as returned	by
	   Socket::inet_aton())	and translates it into a two-letter country
	   code. If the	IP address is not contained within the database,
	   returns undef.

       $cc = $reg->db_time()
	   Returns the creation	date of	the database, measured as number of
	   seconds since the Unix epoch	(00:00:00 GMT, January 1, 1970).
	   Suitable for	feeding	to "gmtime" and	"localtime". When used with
	   IP::Country::Medium or Slow objects,	returns	zero.

PERFORMANCE
       With a random selection of 65,000 IP addresses, the module can look up
       over 15,000 IP addresses	per second on a	730MHz PIII (Coppermine) and
       over 25,000 IP addresses	per second on a	1.3GHz Athlon. Out of this
       random selection	of IP addresses, 43% had an associated country code.
       Please let me know if you've run	this against a set of 'real' IP
       addresses from your log files, and have details of the proportion of
       IPs that	had associated country codes.

IP::Country::Slow warning
       During tests of this module, it was found that there was	no measurable
       advantage in using this module in preference to IP::Country::Medium or
       IP::Country::Fast. You should use IP::Country::Medium is	the majority
       of your lookups are of the form 'rtfm.mit.edu' (domain names), and
       IP::Country::Fast if the	majority of your lookups are of	the form
       '18.181.0.24' (IP addresses).

       IP::Country::Medium caches domain-name lookups, whereas
       IP::Country::Fast does not.

       It is *very* rare for a domain-name lookup to differ from the database
       used by IP::Country::Fast. Thus,	there is no good reason	to prefer a
       slow domain-name	lookup to a fast database lookup. Nor is there any
       significant difference in coverage between the domain-name system and
       database. If you	can find a real	reason to use IP::Country::Slow, let
       me know.

COUNTRY	CODES
       You'll probably want some kind of country code -> country name
       conversion utility: you should use Geography::Countries from CPAN.

       However,	you should note	the circumstances where	the country code
       returned	by IP::Country will deviate from those used by
       Geography::Countries:

	 AP - non-specific Asia-Pacific	location
	 CS - Czechoslovakia (former)
	 EU - non-specific European Union location
	 FX - France, Metropolitan
	 PS - Palestinian Territory, Occupied
	 ** - intranet address
	 undef - not in	database

BUGS/LIMITATIONS
       Only works with IPv4 addresses and ASCII	hostnames.

SEE ALSO
       IP::Country::Fast - recommended for lookups of hostnames	which are
       mostly in the dotted-quad form ('213.45.67.89').

       IP::Country::Medium - recommended for lookups of	hostnames which	are
       mostly in the domain-name form ('www.yahoo.com'). Caches	domain-name
       lookups.

       IP::Country::Slow - NOT RECOMMENDED. Only included for completeness.
       Prefers domain-name lookups to database lookups,	which is an expensive
       strategy	of no benefit.

       Geo::IP - wrapper around	the geoip C libraries. Less portable. Not
       measurably faster than these native Perl	modules. Paid subscription
       required	for database updates.

       <http://www.apnic.net> -	Asia pacific

       <http://www.ripe.net> - Europe

       <http://www.arin.net> - North America

       <http://www.lacnic.net> - Latin America

       <http://www.afrinic.net>	- Africa and Indian Ocean

COPYRIGHT
       Copyright (C) 2002-2005 Nigel Wetters Gourlay. All Rights Reserved.

       NO WARRANTY. This module	is free	software; you can redistribute it
       and/or modify it	under the same terms as	Perl itself.

       Some parts of this software distribution	are derived from the APNIC,
       LACNIC, ARIN, AFRINIC and RIPE databases	(copyright details below).  I
       am not a	lawyer,	so please direct questions about the RIR's licenses to
       them, not me.

APNIC conditions of use
       The files are freely available for download and use on the condition
       that APNIC will not be held responsible for any loss or damage arising
       from the	application of the information contained in these reports.

       APNIC endeavours	to the best of its ability to ensure the accuracy of
       these reports; however, APNIC makes no guarantee	in this	regard.

       In particular, it should	be noted that these reports seek to indicate
       the country where resources were	first allocated	or assigned. It	is not
       intended	that these reports be considered as an authoritative statement
       of the location in which	any specific resource may currently be in use.

ARIN database copyright
       Copyright (c) American Registry for Internet Numbers. All rights
       reserved.

       The ARIN	WHOIS data is for Internet operational or technical research
       purposes	pertaining to Internet operations only.	 It may	not be used
       for advertising,	direct marketing, marketing research, or similar
       purposes.  Use of the ARIN WHOIS	data for these activities is
       explicitly forbidden.  ARIN requests to be notified of any such
       activities or suspicions	thereof.

RIPE database copyright
       The information in the RIPE Database is available to the	public for
       agreed Internet operation purposes, but is under	copyright.  The
       copyright statement is:

       "Except for agreed Internet operational purposes, no part of this
       publication may be reproduced, stored in	a retrieval system, or
       transmitted, in any form	or by any means, electronic, mechanical,
       recording, or otherwise,	without	prior permission of the	RIPE NCC on
       behalf of the copyright holders.	Any use	of this	material to target
       advertising or similar activities is explicitly forbidden and may be
       prosecuted.  The	RIPE NCC requests to be	notified of any	such
       activities or suspicions	thereof."

LACNIC database	copyright
       Copyright (c) Latin American and	Caribbean IP address Regional
       Registry. All rights reserved.

AFRINIC	copyright
       Seems to	be the RIPE copyright. I'm sure	they'll	correct	this in	due
       course.

perl v5.24.1			  2013-05-15			IP::Country(3)

NAME | SYNOPSIS | DESCRIPTION | CONSTRUCTOR | OBJECT METHODS | PERFORMANCE | IP::Country::Slow warning | COUNTRY CODES | BUGS/LIMITATIONS | SEE ALSO | COPYRIGHT | APNIC conditions of use | ARIN database copyright | RIPE database copyright | LACNIC database copyright | AFRINIC copyright

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