COIN is an association for telecommunications providers. The association is managed by the COIN management board, which includes representatives of our members. The COIN administrative office is responsible for operations.

Within COIN decisions are made by the General Assembly, the most important governing body of the COIN association. The General Assembly meets at least bi-annually. All members are represented in the General Assembly and all members are bound to the decisions made by the General Assembly. Decisions are made by unanimity of votes.

Management board and administrative office

The COIN association is managed by the COIN management board. The COIN management board currently consists of:





Jigo van Haperen


Chairman and General Affairs

June 2023

Florian Overkamp


Information Management

December 2022

Alexander van ’t Zand

T-Mobile / Tele2

Finance, FIST, HR

June 2023

Meinske van Heerswaarden


Legal, Communication

October 2023

Hans van der Giessen


Public and Regulatory Affairs

October 2023

Nico Dammers



December 2021

The COIN administrative office takes care of the operational affairs within COIN. The COIN administrative office is directed by Stefphen Mans and has its own personnel.

COIN Working Groups

Coordination and alignment on specific topics takes place within the COIN working groups. In the working groups further development of existing and future COIN services is being discussed. Do current services still meet market requirements and is there a need for new services? The COIN working groups are open to all members of COIN.

These are the current COIN working groups:

  • Number Portability
  • Switching
  • 112 and Subscriber Information
  • Access services
  • Calling Line Identification
  • ENUM
  • Fraud Convenant
  • Regional Roaming

Change process

COIN has a standard process for applying changes to its services. Proposals for change are submitted to the Change Control Board. The Change Control Board will assess a change. After approval by the Change Control Board a change will be effectuated and will be adopted in a COIN standard. All COIN members are represented on the Change Control Board.