During the lease renegotiation, it is very common for the same IP to be reassigned to your router. However in most instances your router will renegotiate this lease prior to its expiration. ![]() The typical lease time for ISP’s in the United States is roughly 7 days. When your router receives a non-static DHCP assigned IP address from your ISP there is a pre-defined time limit built into the assignment, this time limit is called a DHCP Lease. These IP addresses are assigned by your ISP via the basic process outlined below. Most residential customers have a dynamic IP address, meaning that it can change. These IP address assignments can total hundreds or even millions of IP’s for large businesses. In fact most business once they reach a certain size will have IP addresses directly assigned to them from ARIN (American Registry of Internet Numbers, which is the governing body for IP address assignment in the United States), instead of their ISP. Most purchasers of business class internet have static IP addresses assigned to them since servers and a number of business applications or Virtual Private Networks (VPNs) typically require the same IP address every day in order to operate properly. Your ISP can either configure your IP address to be static (it stays the same) or dynamic (it can change). Or put more simply DHCP is the process your Internet Service Provider (ISP) uses to assign an IP Address to your home or business. ![]() DHCP is a client/server protocol that automatically provides an Internet Protocol (IP) host with its IP address and other related configuration information such as the subnet mask and default gateway (Source Microsoft TechNet). ![]() One of the most common questions we get from resellers and customers is - don’t IP addresses change? If so how can you target digital ads at households using an IP address? To fully understand the nature of IP address assignment, you need to know a little more about DHCP or Dynamic Host Configuration Protocol.
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