It's been exactly one year since [the blog author] looked at the status of the Russian space-based early-warning system. This means that [the blog author] missed the point when one of the satellites deployed on a highly-elliptical orbit, Cosmos-2469 (37170), stopped operations. The satellite, launched in September 2010, did not perform a regular orbit-keeping maneuver expected in February-March 2013. It has been drifting off the station since then.
Cosmos-2469 was reported to be the last satellite of the 73D6 type deployed on HEO, so no more HEO launches are expected. There are still two working satellites on HEO - Cosmos-2422 (launched in July 2006, it is the oldest early-warning satellite in orbit) and Cosmos-2446 (launched in December 2008). The is also one geostationary satellite - Cosmos-2479 (this is relatively new - it was launched in March 2012).
link.
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