Contact Us

hh9q863 (Eletronic Data Box)

OKsystem a.s., Na Pankráci 125, 140 00 Praha 4
IČ: 27373665     DIČ: CZ27373665
UniCredit Bank Czech Republic and Slovakia, a.s.
Account number: 48973004 / 2700     IBAN: CZ0327000000000048973004

OKsystem is a company incorporated in the Commercial Register maintained by the Municipal Court in Prague, Section B, Insert 20326.

Data Protection Officer: JUDr. Alena Kučerová,

Czech Republic


OKsystem a.s.
Na Pankráci 1690/125
140 00 Praha 4 - Nusle

Czech Republic


OKsystem a.s.
Triniti Office Center
Trnitá 500/9
602 00 Brno

Czech Republic


OKsystem a.s.
Smart Innovation Center
28. října 3388/111
702 00 Ostrava - Moravská Ostrava

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New York

OKsystem Inc.
580 5th Ave, Suite 820
NY 100 36 New York

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Kuala Lumpur

OKsystem Malaysia Sdn. Bhd.
A1-06-09, Arcoris Business Suites,
Block A1, No. 10, Jalan Kiara,
Mont Kiara, 504 80
Kuala Lumpur, Malaysia
IČ: 202201017445

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The contacts are listed by products

Hotline OKsystem

236 072 111

Hotline Checkbot

Hotline OKpráce

Hotline OKcentrum

Conference hall

We offer a modern conference hall, including state-of-the-art technical equipment, which is within a short distance from the Prague city center.

More Information

Conference setup style

The conference hall can be divided into two – totally independent – venues.

Technical Equipment

Modern equipment for presentations is included in the price.


The size of the hall is 385 m2 The capacity is up to 300 people.


The conference hall is located in Praha 4 – a popular business center.

Registration authority

OKsystem is the registration authority and a branch of First Certification Authority, a.s. OKsystem issues commercial and qualified certificates.

More Information

The registration authority is located at OKsystem a.s. in Prague (Na Pankráci 125, 140 00 Praha 4) and in Ostrava (28. října 3388/111, 702 00 Ostrava).

Which certificates are issued?

These registration authorities issue all kind of certificates. Nowadays it is necessary to arrange an appointment in advance to visit the registration authority. Call +420 236 072 302 for Prague, +420 236 072 560 for Ostrava visit.

OKsystem is registered in Electronic Records of Sales (EET) as of 1 March 2017.

Pursuant to the Act on Registration of Sales, the seller is obliged to issue a receipt to the buyer. At the same time, the seller is obliged to register the received sales with the tax administrator on-line; in the event of a technical failure, no later than 48 hours.