According to the FBI, the websites generated about $26 million in revenue.
The agency said Pratt has ties to, or may visit, New Zealand, Australia, Italy, Spain, Portugal, Turkey, Singapore, Japan, Chile, Croatia, and France.
In January, in a civil case separate to the criminal charges faced by Pratt and Wolfe, a California court ordered the two men to pay $19 million in damages to 22 women, mostly students, aged between 18 and 23.
The court found that through a series of companies, including several registered to Vanuatu, Pratt owned and received 100 per cent of the profits from the porn websites.
The judgment found the two New Zealanders - as well as US citizen Rueben Andre Garcia, a porn actor - liable for fraud and breach of contract for lying to women about where the pornographic videos would be disseminated, and how much they would be paid for their work. The judge ordered that videos and photographs of the women be removed from the website.
According to the judgment, the men advertised clothed modelling work on Craiglist in the US and Canada, then convinced young respondents to fly to San Diego to shoot pornographic videos and photographs, promising anonymity and fees of up to $10,500.
"Defendants assure the women that the video will never be seen by anyone they know because it will only be distributed on DVD in a foreign country; it thus will never be available in the United States, and it will never be published online," the judgment reads.
But videos were distributed online, as well as being sent directly to members of the women's communities - in some cases to parents, siblings, sports coaches, employers, and university professors.
Approximately 60 emails were sent to one plaintiff's law school. The women's names and other personal information was also deliberately disseminated.
The criminal charges faced by Pratt are conspiracy to commit sex trafficking by force, fraud and coercion; production of child pornography; sex trafficking of a minor and by force, fraud and coercion; sex trafficking by force, fraud and coercion; and criminal forfeiture.
Pratt is described as being six feet tall, with brown hair, and hazel eyes. He is known to use "Mark" as an alias.
Anyone with information about the whereabouts of Michael James Pratt is asked to contact the FBI in San Diego on +1 (858) 320 1800. Tips can also be submitted online at tips.fbi.gov.
- RNZ
