Headquarter Office location & general mailing:

O.T.C. International
501 Silverside Rd Ste 105
Wilmington, DE 19809
USA

Tel: +1 302 525 8163
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www: www.otcert.com

Regional consulting partners:

Telecom-project inc.

4 Programmistov street, office 306
Moscow, 141980
Russia

Tel: +7 495 646-64-01
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www: www.abcreg.ru