| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| IA |
|
BMG-Net, Indonesia (IA-Net) | 1980 | 2599 |
| IO |
|
EvK2-CNR Pyramid Laboratory - Mount Everest | 1980 | 2599 |
| IQ |
|
Plate Boundary Project Iquique, GFZ Potsdam, Germany | 1980 | 2599 |
| IS |
|
Israelian Broadband Seismological Network (GII-Net) | 1980 | 2599 |
| IV |
|
Italian Seismic Network | 1988 | 2599 |
| IX |
|
Irpinia Seismic Network, Italy | 2005 | 2599 |
| IY |
|
Rete Universita Calabria | 2021 | 2599 |
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