The Natural Philosopher wrote:
came to my attention, since web security is a bit of an issue I have to
deal with.

This site wont hurt, but it will tell you, possibly rather too exactly
(it certainly knew which exchange I was on ADSL wise, and I'd still like
to know how) where you are located.

http://www.ip-tracker.org/locator/ip-lookup.php

I would be very interested to know how many people here find the same -
that it is more accurate than it has any right to be.

It places the centre of the 20 mile radius that it thinks I'm in about 4
miles from my actual location. It might get a bit closer in London, but
only because tha area covered by each block in the IP range for a
particular ISP is smaller due to the greater population density.

If I log on via 3G, it thnks I'm in the docklands, which are about 200
miles away.

A fixed IP address may well have the street address associated with it,
depending on how particular the ISP is about registering such things.
--
Tciao for Now!

John.