Ashley Madison is an online dating site used by people looking to have extramarital affairs, but the details of its customers have been released online after hackers gained access to the site.

A Fairfax Media analysis of the released data with developer Luke Metcalfe has examined the locations users entered when they signed up to Ashley Madison, to find where they are based.

In the 2372 postcode there were 79 people registered to the site.

A further 75 users were found in the 2371, 2475 and 2476 postcodes which also cover areas in the Tenterfield shire.

Already, details of users including their names, profiles information, email and postal addresses, phone numbers, credit card details and even information connected to their employers if they signed up at work, have been posted online.

And, the massive privacy breach could get worse, with hackers threatening to release explicit chats as well as naked photos of users.

According to the data, inner Sydney, including Haymarket and Dawes Point, is the most adulterous postcode; the least adulterous postcode area is Ashby in the Maclean, ranked at 478 in NSW.

Attunga locals get the top sleaze slot for the New England electorate with 400 accounts registered to the small farming community north of Tamworth.

At the 2006 census Attunga only had 633 residents.

Almost 10 per cent of Werris Creek’s population have accounts with Ashley Madison, while six per cent of Moree’s population signed up using the town’s postcode.

Armidale, the wider Liverpool Plains area and Gunnedah all had more than 4 per cent of the population signed up with an Ashley Madison account, while Narrabri and Walcha had just over 3 per cent of the town’s using the cheating website.

Over 160 accounts were registered in the 4380 postcode just over the border in Stanthorpe.

The massive leak has hit cities across the world and Sydney has been named as among the top three of places with accounts.

The leak has sent the company which controls Ashley Madison scrambling and had both users of the site and others questioning how to protect their details online.

“This event is not an act of hacktivism, it is an act of criminality. It is an illegal action against the individual members of AshleyMadison.com, as well as any freethinking people who choose to engage in fully lawful online activities,” website operators Avid Life Media said in a statement.

It’s being reported that over 37 million people have been caught up in the hack scandal.