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determine mac address from ip, mac address lookup/ping

Main content page - determine mac address from ip.ISPs that assign a given, dedicated IP address to a customer can determine where you are surfing from because of the assignment of IP address, but this does not mean a web site owner can determine what cross street intersects your block of the neighborhood.
In computer networking, a Media Access Control address (MAC address), Ethernet Hardware Address (EHA), hardware address, adapter address or physical address is a quasi-unique identifier assigned to most network adapters or network interface cards (NICs) by the manufacturer for identification.
Here are links to the URLs where you can lookup an IP address. Be aware that if you lookup an Asian allocated IP address in a different region's RIR it will provide a link to the appropriate RIR.
There are a number of ways to find out whether your system is resolving properly. You can use nslookup to verify name resolution. The nslookup command can be used to find various details relating to a particular DNS (Domain Name System) such as IP address, MX records etc.
A ping sends a packet of data to a specific address and waits for an appropriately named "pong" response. The ping name actually was not derived from table tennis, but was devised from the sound that submarine sonar makes when it bounces off physical objects.
The default lease is five days, but a network administrator should evaluate their own particular circumstances to determine an appropriate lease. To set up DHCP, you basically need a DHCP-supported client (at least one) and router, and a DHCP server.