| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| D0 |
|
Kamchatka seismic monitoring network | 2015 | 2016 |
| DE |
|
Nanometrics Research Network | 2013 | 2599 |
| DK |
|
|
|
2599 |
| DR |
|
Centro Nacional de Sismologia (CNS) | 1998 | 2599 |
| DT |
|
Carnegie Analog Broadband Seismograph Network | 1965 | 2003 |
| DU |
|
Seismological Association of Australia | 1995 | 2599 |
| DW |
|
Digital World-Wide Standardized Seismograph Network | 1980 | 1994 |
| DZ |
|
Algerian National Seismic Network | 1980 | 2599 |
| FA |
|
UCLA Seismic Network | 2003 | 2599 |
| FN |
|
Northern Finland Seismological Network | 1980 | 2599 |
| FO |
|
Seismic stations in France not belonging to the academic RESIF networks | 1900 | 2500 |
| FR |
|
|
1962 |
|
| VA |
|
VAL D'AGRI NETWORK | 2001 | 2599 |
| VD |
|
High Agri Valley geophysical Observatory | 2019 | 2599 |
| VE |
|
Red Sismológica Satelital Nacional | 2000 | 2599 |
| VI |
|
|
|
|
| VM |
|
Marche Seismic Network | 2012 | 2599 |
| VO |
|
CAVONE SEISMIC NETWORK | 1990 | 2599 |
| VR |
|
Virgo Interferometric Antenna for Gravitational Waves Detection | 2019 | 2599 |
| VU |
|
Vanuatu Seismic Network | 2010 | 2599 |
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