Is SIEFF, CONSTANTINE VLADISLAV a legitimate registered business?

Yes, SIEFF, CONSTANTINE VLADISLAV has an active ABN (11043581465) registered with the Australian Business Register.

Is SIEFF, CONSTANTINE VLADISLAV registered for GST?

Yes, SIEFF, CONSTANTINE VLADISLAV is registered for Goods and Services Tax (GST).

Where is SIEFF, CONSTANTINE VLADISLAV located?

SIEFF, CONSTANTINE VLADISLAV is located in Queensland, postcode 4102, Australia.

ABN 11 043 581 465

SIEFF, CONSTANTINE VLADISLAV

Individual/Sole Trader

Registration Details

ABN

11 043 581 465

Business Name

SIEFF, CONSTANTINE VLADISLAV

ABN Status

Active

Registration Date

23 July 2013

State

Queensland

Postcode

4102

Entity Type

Individual/Sole Trader

Record Last Updated

18 July 2025

Goods and Services Tax (GST)

GST Status

Registered

GST Registration Date

5 March 2023

Other Names

Trading Name

CON SIEFF

Business Summary

SIEFF, CONSTANTINE VLADISLAV is a registered Australian business that is currently active since 23 July 2013. The entity operates as an Individual/Sole Trader.

This business is located in Queensland, postcode 4102.

This business is registered for GST since 5 March 2023. When you receive a tax invoice from this business, you may be entitled to claim GST credits on your BAS if you are also registered for GST and the purchase is for your business.

Data sourced from the Australian Business Register (ABR) bulk data extract. This record was last updated on 18 July 2025.

Change History

4 March 2023
- GST Status
  CancelledActive
- GST Status Date
  1 October 20225 March 2023
30 September 2022
- GST Status
  ActiveCancelled
- GST Status Date
  23 July 20131 October 2022
11 December 2019
- Other Names
  −Interkontinental law and industrial consulting
1 February 2017
- Other Names
  −iNTERNATIONAL LAW AND INDUSTRIAL CONSULTING
3 August 2016
- Other Names
  +Interkontinental law and industrial consulting
18 September 2013
- Other Names
  +iNTERNATIONAL LAW AND INDUSTRIAL CONSULTING
22 July 2013
- ABN Status
  CancelledActive
- ABN Status Date
  6 March 201223 July 2013
- GST Status
  CancelledActive
- GST Status Date
  1 July 200123 July 2013
- Postcode
  41694102
5 March 2012
- ABN Status
  ActiveCancelled
- ABN Status Date
  28 April 20006 March 2012
30 June 2001
- GST Status
  ActiveCancelled
- GST Status Date
  1 July 20001 July 2001
30 June 2000
- GST Status
  —Active
- GST Status Date
  —1 July 2000
27 April 2000
- Business Name
  —SIEFF, CONSTANTINE VLADISLAV
- ABN Status
  —Active
- ABN Status Date
  —28 April 2000
- State
  —QLD
- Postcode
  —4169
- Other Names
  +CON SIEFF

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