An IP address object in NetBox comprises a single host address (either IPv4 or IPv6) and its subnet mask, and represents an IP address as configured on a network interface. IP addresses can be assigned to [device](../dcim/device.md) and [virtual machine](../virtualization/virtualmachine.md) interfaces, as well as to [FHRP groups](./fhrpgroup.md). Further, each device and virtual machine may have one of its interface IPs designated as its primary IP per address family (one for IPv4 and one for IPv6).
An IP address can be designated as the network address translation (NAT) inside IP address for exactly one other IP address. This is useful primarily to denote a translation between public and private IP addresses. This relationship is followed in both directions: For example, if 10.0.0.1 is assigned as the inside IP for 192.0.2.1, 192.0.2.1 will be displayed as the outside IP for 10.0.0.1.
NetBox does not currently support tracking application-level NAT relationships (also called _port address translation_ or PAT). This type of policy requires additional logic to model and cannot be fully represented by IP address alone.
Additional statuses may be defined by setting `ipam.IPAddress.status` under the [`FIELD_CHOICES`](../../configuration/data-validation.md#field_choices) configuration parameter.
