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Verified CRO data Updated 2026-05-16

ZERO DAYS CYBER SECURITY LIMITED

● Active

Active Irish company in Dublin 11, incorporated 31 August 2018 — NACE 62.02 (computer consultancy), CRO 633142.

CRO 633142 Incorporated 31 Aug 2018 NACE 62.02 — Computer consultancy Meath

Overview

Zero Days Cyber Security Limited is a cybersecurity organisation based in Ireland that specialises in gamified cyber-security training through capture-the-flag (CTF) events. The company promotes and hosts a range of events including its flagship in-person CTF, Cyber-Schools for secondary students, and qualifiers for the European Cyber Security Challenge. It also runs custom events for schools, colleges, and corporations. The annual Zero Days CTF attracts over 300 participants and is one of the largest on-site CTF events globally. The business organises events such as the Irish College's Cyber-Security Challenge and provides sponsorship and partnership opportunities. Events are held at venues like TU Dublin in Blanchardstown. Contact information is available via [email protected]. The name suggests a focus on educational and competitive cybersecurity engagement rather than product-based services. Beyond registry-level identification, no further business details are publicly captured.

Location & registered address

3 Mellowes Crescent
Ratoath
Meath
Ireland
Dublin
Dublin 11
Ireland

Industry classification

NACE Rev. 2 — 62.02 — Computer consultancy

Class 62.02 covers computer consultancy activities — advising on hardware and software requirements, system planning and design.

→ All computer consultancy companies in Ireland In Meath

Company facts

Sourced from Companies Registration Office (CRO)

Legal name

ZERO DAYS CYBER SECURITY LIMITED

CRO number

633142

Status

Active

Legal form

Ltd - Private Company Limited By Shares

Incorporated

31 August 2018

Operating years

8 years

NACE Rev. 2

Computer consultancy

Registered county

Meath

Registered office

3 MELLOWES CRESCENT, RATOATH,MEATH,Ireland, DUBLIN, Dublin 11, Ireland

Last annual return

31 July 2023

Last accounts

31 July 2023

Frequently asked questions

What does ZERO DAYS CYBER SECURITY LIMITED do?

Zero Days Cyber Security Limited is a cybersecurity organisation based in Ireland that specialises in gamified cyber-security training through capture-the-flag (CTF) events.

Where is ZERO DAYS CYBER SECURITY LIMITED based?

ZERO DAYS CYBER SECURITY LIMITED's registered office is at 3 Mellowes Crescent, Ratoath, Meath, Ireland, Dublin, Dublin 11, Ireland.

When was ZERO DAYS CYBER SECURITY LIMITED founded?

ZERO DAYS CYBER SECURITY LIMITED was incorporated with the Irish Companies Registration Office on 31 August 2018, more than 7 years ago.

Is ZERO DAYS CYBER SECURITY LIMITED still active?

Yes. The company is listed with the Companies Registration Office under status 'Normal' as of the most recent filing on 31 July 2023.

What is the CRO number for ZERO DAYS CYBER SECURITY LIMITED?

633142.

Where this data comes from

CRO Open Data data.gov.ie/dataset/companies-register Weekly All factual fields
AI synthesis Qwen3-4B-Instruct (locally hosted) 2026-05-16 Prose summary only

About this summary — the prose Overview above is generated by an LLM from the cited sources. Factual fields (CRO number, status, dates, address, NACE code) come directly from the Companies Registration Office. If you spot an error, please report it →

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