Let's start be defining a Regular Lodge, then look at ones that aren't. As stated in the related link, listed below:

TYPES OF FREEMASON LODGES

What is a "Regular" Masonic Lodge?

Regularity is the process by which individual Grand lodges recognize one another for the purposes of allowing formal interaction at the Grand Lodge level and visitation by members of other jurisdictions.

The largest collection of mutually recognized Grand Lodges derives its regularity from the United Grand Lodge of England (UGLE) based on a set of specific criteria. Dating back to 1717, [the] UGLE is considered to be not only the oldest, but the largest grouping of lodges.

UGLE provides a list of recognized Grand Lodges on its website [as do many others].

What is a "Clandestine" Lodge?

A "clandestine lodge" is one that does not hold a proper charter from any Grand lodge.

What is an "Irregular" Lodge?

An "irregular lodge" is a lodge that does have a charter from a Grand lodge, but its Grand lodge is not recognized by other Grand lodges.