Gardai investigating prostitution last week quizzed nearly 40 people suspected of buying sexual services.
Searches, targeting the demand for prostitution, were carried out across Dublin and six other counties.
The intelligence led Operation Quest aimed to clamp down on "prostitution and to protect vulnerable persons, including victims of human trafficking involved in prostitution".
The Days of Action were also carried out across Kilkenny, Carlow, Cork, Kerry, Galway and Donegal between September 16 and 21.
During the operation, 38 suspects spoke with gardai and files are now being prepared for the Director of Public Prosecutions, with a view to establishing prosecutions.
A garda spokesman said: "An Garda Síochána conducted intelligence led operations across nine Garda Divisions: DMR North, DMR East, DMR South Central, DMR West, Kilkenny/Carlow, Cork City, Kerry, Galway, Donegal.
"Searches in both rural and urban areas targeted the demand for prostitution and to enforce legislation which criminalises the purchase of sexual services.
"These Days of Action were coordinated by the ‘Operation Quest’ team at the Garda National Protective Services Bureau, in liaison with local Detective Units and took place in furtherance of an enforcement strategy to target persons involved in the purchase of sexual services.
"These Days of Action were also scheduled to coincide with an EMPACT (European multidisciplinary platform against criminal threats) Week of Action targeting sexual exploitation.
"This is the second national operation targeting the demand for prostitution in 2019 and further operations are planned."
