9th Missile Defense Division
Identification
This record matches Russia’s 9th Missile Defense Division, military unit 75555, headquartered in Sofrino, Moscow Oblast. Open registry records for unit 75555 list Sergey P. Grabchuk as commander, and Russian state reporting identifies Grabchuk as the commander of the missile-defense formation responsible for Moscow’s ABM system. ([saby.ru](https://saby.ru/profile/5038073159-503801001))
Mission
The division is the operating formation for the A-135 missile-defense system tasked with protecting Moscow and the Central Industrial Region against a limited ballistic-missile strike. Independent defense analysis likewise describes A-135 as Russia’s only currently deployed anti-ICBM system, focused on the Moscow area rather than a nationwide shield. ([ria.ru](https://ria.ru/20200122/1563703189.html))
Core nodes
Its best-documented infrastructure is the Don-2N radar complex near Sofrino. TASS describes Don-2N as the central and most complex element of Moscow missile defense, responsible for ballistic-target detection, tracking, and interceptor guidance, and integrated with missile-warning and space-surveillance networks. Public Russian reporting in May 2024 also described unit 20007 as the formation’s hardened command-computing point built alongside the Don-2N complex. ([tass.ru](https://tass.ru/armiya-i-opk/3970533))
Interceptor posture
Current public-source inventories consistently indicate 68 silo-based 53T6 endo-atmospheric interceptors deployed at five sites around Moscow. The older 51T6 exo-atmospheric layer is publicly described as withdrawn from service; historical Russian reporting linked that retired layer to sites in the Naro-Fominsk and Sergiyev Posad areas. ([russianforces.org](https://russianforces.org/rus/sprn/))
Modernization
Russian state sources describe the Moscow ABM system as undergoing deep modernization intended to expand engagement range and altitude, improve reliability, and extend operating life. A 2021 state-media report on a test of a new interceptor suggested replacement of legacy missiles, but the specific designation and deployment status were not officially confirmed in that report. ([ria.ru](https://ria.ru/20200122/1563703189.html))