Exhibit 21.1

First Advantage Corporation Subsidiaries

First Advantage Corporation

FADV (Australia) PTY Limited

FADV B.V.

FADV Cooperatief UA

FADV European Data Center B.V.

FADV Malaysia Sdn. Bhd

Fastball Holdco, G.P. LLC

Fastball Holdco, L.P.

Fastball Parent, Inc.

First Advantage (Beijing) Co. Ltd

First Advantage (HK) Limited

First Advantage (Zhuhai) Co. Limited

First Advantage Acquisitions, Inc.

First Advantage Australasia Pty Ltd.

First Advantage Australia Pty Ltd.

First Advantage Background Services Corp.

First Advantage BackTrack Reports, LLC

First Advantage Bangladesh Ltd

First Advantage Canada, Inc.

First Advantage Intermediate Inc.

First Advantage Data Solutions, LLC

First Advantage Enterprise Screening Corporation

First Advantage Europe Ltd.

First Advantage Global Operating Center Private Limited

First Advantage Holdings, LLC

First Advantage Indian Holdings, LLC

First Advantage Japan K.K.

First Advantage Limited

First Advantage New Zealand Limited

First Advantage Occupational Health Services Corp.

First Advantage Philippines, Inc.

First Advantage Priderock Holding Company, Inc.

First Advantage Private Limited

First Advantage Pte. Ltd

First Advantage Quest Research Corporation

First Advantage Quest Research Group Ltd.

First Advantage Quest Research Limited

First Advantage Tax Consulting Services, LLC

First Advantage U.S., LLC

National Credit Audit Corporation

TP Verify Screening Services, LLP

Verify (Mauritius) Limited

Verify Limited