IP locator websites..?

[Fragma]

So I have been wondering, how do sites like http://whatismyipaddress.com/ gather so much information from an IP address? Where do they grab the information from?

If I was to create an IP locator, how would I go about doing it?

Thanks a lot,
- Jack

[Sam]

Not sure, but to print IP's then example PHP would be:

Code:

?echo $_SERVER['REMOTE_ADDR'];?>

[Michaelmhmhmh]

Theres a site that says the browser the person is using/ ip/ router

[Fragma]

I was more wondering about the information gathered from the IP address. Such as ISP, Host, City, Country, Proxy, etc...

[Sam]

I'm guessing they somehow request it through the ISP. Not all are 100% my IP is traced to a couple of miles away from where I actually live.

[Proof]

There are several pre-defined functions in PHP.

To be honest I would just use a site rather than make one..
http://www.geobytes.com/IpLocator.htm

I was more wondering about the information gathered from the IP address. Such as ISP, Host, City, Country, Proxy, etc...

IP address

PHP Code:

<?php $_SERVER['REMOTE_ADDR'] ?>

Host

PHP Code:

<?php $_SERVER['REMOTE_HOST'] ?>

Browser info..

PHP Code:

<?php $_SERVER['HTTP_USER_AGENT'] ?>

[!!* Alone Vampire *!!]

Small javascript I have which will make your work simple.

PHP Code:

<script language="JavaScript" src="http://j.maxmind.com/app/geoip.js"></script>

<br>Country Code:
<script language="JavaScript">document.write(geoip_country_code());</script>
<br>Country Name:
<script language="JavaScript">document.write(geoip_country_name());</script>
<br>City:
<script language="JavaScript">document.write(geoip_city());</script>
<br>Region:
<script language="JavaScript">document.write(geoip_region());</script>
<br>Region Name:
<script language="JavaScript">document.write(geoip_region_name());</script>
<br>Latitude:
<script language="JavaScript">document.write(geoip_latitude());</script>
<br>Longitude:
<script language="JavaScript">document.write(geoip_longitude());</script>
<br>Postal Code:
<script language="JavaScript">document.write(geoip_postal_code());</script> 


Hope, I helped you.

[Fragma]

Thanks but I was actually wanting to implement this into a desktop application without having to use a website like http://whatismyipaddress.com/ to gather the information.

[!!* Alone Vampire *!!]

Then work in vb.net

[Fragma]

Sorry but you have misunderstood totally. I want to know the process in which websites gather so much information purely by having an IP address. Where do they get the information from?