Armenia–Iran border
The Armenia–Iran border (Armenian: Հայաստան–Իրան սահման, romanized: Hayastan–Iran sahman, Persian: مرز ارمنستان-ایران) is 44 km (27 mi) in length and runs from the tripoint with Azerbaijan’s Nakhchivan region in the west to the tripoint with Azerbaijan proper in the east. Between 1992 and 2025, the border was protected by guards of the Russian Federal Security Service after which protection was transferred to the Armenian Border Guard Service.