4th Air Defense Division
Identification
This site is best identified as the headquarters of Russia’s 4th Air Defense Division, military unit 52116, in Dolgoprudny, Moscow Oblast. A 2025 Russian Geographical Society listing places military unit 52116 at Vostochnaya Ulitsa 15A, Dolgoprudny; historical registry data also place unit 52116 in the Khlebnikovo microdistrict of the same city. ([dictant-special.rgo.ru](https://dictant-special.rgo.ru/dictant_place/71912))
Command role
Russian institutional material states that the Kirpikov-named formation was redesignated from the 4th Air Defense Brigade to the 4th Air Defense Division on 1 December 2014 and entered the 1st Air Defense and Missile Defense Army. TASS reporting on that army states it is tasked with defending Moscow and the Central Industrial Region and fields the S-50M air-defense system with S-400, S-300PM2, and Pantsir-S, alongside the A-135M missile-defense system. ([guraran.ru](https://www.guraran.ru/news/newsread/news_id-13955))
Verified SAM element
One publicly documented combat element associated with this division is the 210th Anti-Aircraft Missile Regiment in the Dmitrov area. TASS, citing the Russian MoD, reported that on 28 January 2022 a new S-400 battalion set entered combat duty there for the air defense of Moscow and the Central Industrial Region; bmpd/VPK separately identified the 210th Regiment as part of the 4th Air Defense Division. ([tass.ru](https://tass.ru/armiya-i-opk/13556999?utm_source=openai))
Radar node
A second verified air-defense site relevant to this headquarters is the 25th Radio-Technical Regiment in Nesterovo, Ruza municipal area. A 2025 municipal report described the regiment as maintaining round-the-clock duty to protect regional airspace, and historical registry data place military unit 86655 at Nesterovo. Those sources confirm an active radar-troops presence west of Moscow, but they do not by themselves confirm the regiment’s exact current subordination to unit 52116. ([riamo.ru](https://riamo.ru/news/obschestvo/v-ruze-73-ju-godovschinu-otmetil-25-j-radiotehnicheskij-polk-pvo/))
Assessment
Open sources support treating Dolgoprudny as a command-and-control location within Moscow’s air-defense belt rather than as a single missile firing site. The combination of a division HQ in Dolgoprudny, a documented S-400 regiment near Dmitrov, and a radar regiment in the Ruza sector is consistent with coverage of the northern and western approaches to Moscow; however, the full current subordinate roster of the 4th Air Defense Division is not publicly confirmed in the authoritative sources reviewed. ([dictant-special.rgo.ru](https://dictant-special.rgo.ru/dictant_place/71912))