CHECKED

Create an account

Companies

Search companies
Addresses
Company groups
Nearby
Service voucher comparison

People and firms

Directors
Bankruptcy trustees
Notaries

Events

Events: Overview
All events

Company changes

Incorporations
Director changes
Name changes
Registered office moves
Mergers and takeovers

Financial publications

Annual accounts filed
Capital changes
Auditor changes

Legal status & closure

Bankruptcies
Judicial reorganisations
Dissolutions and liquidations
Ex-officio strike-offs
Interim measures

Tools

Tools: Overview

Investigate

Analysis workbench
Compare companies
Sector benchmark
Employer check
Network investigator
Company wealth map

Assess companies

Credit check
Supplier due diligence
AML client file

Market and sector

Sector figures
Municipality map
Subsidies

Invoices and lists

Invoice check
Peppol check
Process a list

Starting out

Name check
Local market research

Lookalike companies
Company as of a date
Permit applications
Creditor guide
Contractor check
Self-check
Public procurement exclusion grounds
Trends
Rankings
Survival tables
Public contracts
Starter mirror
Financial plan

NL FR EN

Nederlands Français English

My Checked

Sign in
Create an account

Checked.be · Company dossier https://checked.be/en/c/isosceles-0450111375 · as of 10-11-2026

Home/ Isosceles

Isosceles

Active Risk: very low Non-profit association · founded 1993 · active for 33 yearsLeysstraat 1, 1000 BrusselsKBO/BCE: BE 0450.111.375

No score

< 0.1%within 12 months

Isosceles

Overview
Network & group
Company details

Follow Report Compare

Search this file Follow Risk analysis Report Compare Save to list

At the same address

These companies are registered at the seat of Isosceles today. That says who is based there, not who owns the building.

Leysstraat 1, 1000 Brussels · 1 other company

Dumont de Chassart, Colin (sole trader)

establishment since 19-10-2021

founded in 2021

0776.447.089

Checked · Insight, alerts and connections for every Belgian company, from official sources.

Based on official Belgian registers and filed annual accounts.

NL FR EN

Discover

All tools Sector figures Rankings Municipality map All events Company groups Trends Survival tables

Checked

About Checked Contact Pricing

Help and guides

Frequently asked questions Knowledge base

Integrations

API AI assistants Excel and Google Sheets Company badge

Legal

We would like to set cookies. That happens only with your consent. What we measure

Help us improve Checked

If something looks wrong or is missing, please tell us.

Your message Email (optional, only to reply)