Each network distributing data using FDSN web services or FDSN SEED format must have an assigned FDSN Network Code. To apply for such a network code, select a link below.
If you are an official FDSN member representative you can enter your contact information at the following location:
FDSN Networks and Data Centers appreciate proper acknowledgment when anyone makes use of the data from their organizations.
Learn about the history of the FDSN.
The FDSN approved two new instrument codes for SEED on April 20, 2010.
X & Y Instrument Codes (pdf)
Derived or Generated Channel: Time series derived from observational data or entirely generated by a computer algorithm, as would be the case with synthetic seismograms.
Non-specific Instruments: The instrument code in SEED format covers most commonly used instruments that generate time series. For instruments not specifically covered by an existing instrument code the Y instrument code can be used.