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OK Leo, if what you say is true, and I do not doubt it, how come that whenever I visit some sites even for the first time where no cookies can be present, my location is correctly identified to the suburb I live in, Chelsea in Vic, Aust, as a matter of fact? The reason I suspect that is because it happens at the same time as you are logged on. I have IP addresses on ok. American Registry for Internet Numbers. Each IP address on the global public Internet is administered by one of the 5 RIRs within a particular region of the world. When they decided to send out another folloe up report the wrong document with some of these comments that had been received was sent by mistake. Everything is available at no cost, is free and simple as possible.

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List of assigned /8 IPv4 address blocks

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Smart Whois Record Example Resources. Failing that, I would recommend logging on to the default router of the subnet that this problem is occurring on, and monitoring the ARP table. Once you have the MAC addresses of the two devices, you should be able to tie them to specific switch ports. This question provides more information on how to do that. You can also use an OUI lookup tool to help identify the manufacturer of each device.

NMap should give you what you're looking for or ZenMap if you want a friendlier interface. As an added bonus, it'll also detect all the services that the other computers are running, and possibly make your IDS intrusion detection system freak out. I've always been a fan of Angry IP Scanner.

Yes, not as full featured as NMAP, but can show quite a bit of data quickly. If you have access to the router that's acting as the default gateway for the subnet in question, then listing the ARP cache on the router I believe it's just "show arp" on a Cisco IOS device is the best way to go. It won't show any hosts that haven't communicated within the arp timeout period, or at least that haven't communicated off subnet within the arp timeout period.

But in most cases it's much more likely to get you more complete results than any other method. From the good bad? It's only a trial, but you can grab it from http: I suggest using Fing. It's a simple network scanner that is available for Windows, Mac, Linux, and even for mobile devices for wireless networks Android and iOS devices. And it can easily be used in scripting. There is a little app I use called "kiss the net" that scans and generates a pdf network map for you. Colasoft Mac Scanner is one way to do it.

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

Would you like to answer one of these unanswered questions instead? Home Questions Tags Users Unanswered. Clay Nichols 3 17 Whisk 1, 1 14 To set the target of your nmap scan, determine your default gateway by running ipconfig from the command prompt. Use it in the target field, e. If there's a unix box on the network, you could try arp-scan: Drakonoved 4 Tim Howland 4, 2 21 Definitely handy, although note that it gives you the manufacturer of the NIC, not the network name of the device.

Quick and dirty on Linux: Ivan 2, 2 19

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