Virtual network interface objects

A method, comprising:

• in response to receiving one or more requests comprising a subnet identifier for a subnet comprising one or more IP addresses to be used by a resource instance of a cloud-based computing service:
• assigning one or more IP addresses to a virtual network interface attached to the resource instance, wherein the resource instance is implemented via at least one of one or more servers of the cloud-based computing service;
• and
• performing one or more operations to enable network traffic directed at the one or more IP addresses to be received at the resource instance attached to the virtual network interface.

One or more non-transitory, computer-readable, media storing program instructions that, when executed on or across one or more processors, cause the one or more processors to:

• in response to receiving one or more requests comprising a subnet identifier for a subnet comprising one or more IP addresses to be used by a resource instance of a cloud-based computing service:
• cause one or more IP addresses to be assigned to a virtual network interface attached to the resource instance, wherein the resource instance is implemented via at least one of one or more servers of the cloud-based computing service;
• and
• cause one or more operations to be performed to enable network traffic directed at the one or more IP addresses to be received at the resource instance attached to the virtual network interface.