Subsidiary

State or Country

of Organization

Ascade AB

Sweden

Ascade Holdings AB

Sweden

Ascade Middle East FZ-LLC

United Arab Emirates

Billing Intec Uruguay S.A.

Uruguay

Comtecnet Incorporated

New Jersey

CSG Interactive Messaging, Inc.

Delaware

CSG International Australia Pty Limited

Australia

CSG International Colombia SAS

Colombia

CSG International DP, Inc.

California

CSG International Holdings, LLC

Delaware

CSG International (NZ) Limited

New Zealand

CSG International Pty Limited

Australia

CSG International PTE Ltd.

Singapore

CSG International Sdn Bhd

Malaysia

CSG Media, LLC

Delaware

CSG SA Holdings (Pty) Limited

South Africa

CSG SA Services (Pty) Limited

South Africa

CSG Systems International, Inc.

Delaware

CSG Systems U.K. Limited

United Kingdom

CSG Systems, Inc.

Delaware

Digiquant, Inc.

Delaware

Independent Technology Billing Solutions S de RL de CV

Mexico

CSG Systems International (India) Pvt. Ltd.

India

Independent Technology Systems Limited

United Kingdom

Independent Technology Systems Scandinavia AB

Sweden

Independent Technology Systems SL Unipersonal

Spain

Intec Billing (Holding) Canada Ltd

Canada

Intec Billing Canada Ltd.

Canada

Intec Billing Ireland

Ireland

Intec Billing Nigeria Limited

Nigeria

Intec Billing, Inc.

Delaware

Intec Telecom Systems (France) SARL

France

Intec Telecom Systems Denmark A/S

Denmark

Intec Telecom Systems Deutschland GmbH

Germany

Intec Telecom Systems do Brasil Limitada

Brazil

Intec Telecom Systems Italia S.P.A.

Italy

Intec Telecom Systems Limited

United Kingdom

Intec Telecom Systems South Africa (Pty) Limited

South Africa

P.T. CSG International Indonesia

Indonesia

Telution, Inc.

Delaware

Volubill Danmark ApS

Denmark

Volubill, Inc.

Delaware