LIO (Local Issuing Office)

Since many years first ETSO Task Force on Electronic Data Interchange and later on the working group Electronic Data Interchange of ENTSO-E have been working on optimization of communication in the energy world. Therefore a coding scheme has been developed to facilitate cross-border trade and to efficiently and reliably identify different objects and parties related to the energy market and its activities.

This coding scheme is known as the EIC (Energy Identification Coding) and adopted by ENTSO-E for the harmonization and implementation of standardized electronic data exchange.

The CIO (Central Issuing Office = ENTSO-E) and LIO’s (Local Issuing Offices) are responsible for the registration, issuance and publication of EIC Codes within the energy market.

Published EICs by GTS LIO (52) 27 kB 18 Feb 2019
EIC Reference manual 511 kB 18 Jul 2017

All published EICs by ENTSOE.

Request EIC

As from 01-01-2015 Gasunie Transport Services (GTS) acts as a Local Issuing Office.  You can apply for  the following EIC codes:

  • Z code  : EIC code for identifying Network Points
  • Y code  : EIC code for identifying area zones, and balancing zones
  • W code : EIC code for identifying underground storage and LNG terminals
  • X code  : EIC code for identifying parties
  • V code  : EIC code for identifying locations

Interconnection points should be requested at ENTSOG.

To apply for one of these EIC codes you can use one of the forms  on this page.
For more information please contact:

Trienko Blaauw
Local Issuing Office Gas Transport Services

T: +31505212700

Gasunie Transport Services B.V.
Application Management
Postbus 181
9700 AD Groningen


Only Energy Identification Codes (EIC) codes published in the Central Issuing Office (CIO) or Local Issuing Office (LIO) websites are to be considered as valid EIC codes.

The LIO assumes no responsibility or liability for the accuracy and the completeness of the information provided by an entity requesting an EIC code. In no event shall a LIO be liable for any damages of any kind, including, but not limited to, direct, indirect, general, special, incidental, or consequential damages arising out of any inaccuracy or incompleteness of the information provided by an entity requesting an EIC code