Whalebone

Whalebone, s.r.o. is a Czech network-security company registered in Brno at Jezuitská 14/13, IČO 05120403, incorporated in May 2016 and recorded in the commercial register of the Regional Court in Brno under file C 93547. Its commercial business is DNS-layer security sold to telecommunications operators and enterprises under the Aura, Immunity and Peacemaker names; it says more than 300 telecommunications providers use its services.

The company’s shareholder register is Czech-majority and granular: the founder Robert Šefr and the Czech holding company The Sky is the Limit each hold about 22 percent, with the remainder spread across Czech employee and investor vehicles and two German and Hungarian venture funds, DayOne CEE and Telefónica’s Wayra Deutschland. Two vehicles outside the EU — Unbound Fund LP in Abu Dhabi and Unbound Holdco in Jersey — together hold under ten percent, a minority with no control and no parent company above the Czech entity.

Whalebone coordinated the DNS4EU consortium, which built a European public DNS resolver with the Czech registry CZ.NIC, the Czech Technical University, Poland’s NASK and others under a Digital Europe Programme grant that ran from 2023 to 2025. Since 2026 the company owns and operates the service alone and states that the public resolver stays free for individuals in Europe.