| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| IC |
|
New China Digital Seismograph Network | 1992 | 2599 |
| ID |
|
Project IDA VLP Seismometer Network - UCSD/SIO/IGPP | 1975 | 1995 |
| IE |
|
INL Seismic Monitoring Program | 1972 | 2599 |
| II |
|
Global Seismograph Network - IRIS/IDA | 1986 | 2599 |
| IL |
|
Iranian Long Period Array | 1966 | 1979 |
| IM |
|
International Miscellaneous Stations | 1965 | 2599 |
| IN |
|
National Seismic Network of India | 2000 | 2599 |
| IO |
|
International OGS Network | 2014 | 2599 |
| IP |
|
Instituto Superior Tecnico Broadband Seismic Network | 2002 | 2599 |
| IU |
|
Global Seismograph Network - IRIS/USGS | 1988 | 2599 |
| IV |
|
Italian National Seismic Network | 1988 | 2599 |
| IW |
|
Intermountain West Seismic Network | 2003 | 2599 |
| K5 |
|
Bhutan Seismic Network | 2017 | 2599 |
| KC |
|
Central Asian Seismic Network of CAIAG | 2008 | 2599 |
| KG |
|
Korean Seismic Network - KIGAM | 1997 | 2599 |
| KN |
|
Kyrgyz Seismic Telemetry Network | 1991 | 2599 |
| KO |
|
Bogazici University Kandilli Observatory And Earthquake Research Institute | 1971 | 2599 |
| KP |
|
Korea Polar Observation Network | 2013 | 2599 |
| KR |
|
Kyrgyz Digital Network | 2007 | 2599 |
| KS |
|
Korea National Seismography Network (KNSN-KMA) | 2006 | 2599 |
| KT |
|
KROTONE SEISMIC NETWORK | 2003 | 2599 |
| KW |
|
Kuwait National Seismic Network | 1997 | 2599 |
| KY |
|
Kentucky Seismic and Strong Motion Network | 1982 | 2599 |
| KZ |
|
Kazakhstan Network | 1994 | 2599 |
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