Quick answer
Како́й а́дрес?
kakóy ádres — and how a Russian address is actually read out
The options
Како́й а́дрес?What’s the address?
Напиши́те а́дрес, пожа́луйста.Please write the address down.
Э́то како́й дом?Which building is this?
Кака́я у́лица?Which street is this?
Я по а́дресу…I’m at the address…
The order
Russian goes from big to small: city, street, building, entrance, flat. Москва́, у́лица Ле́нина, дом 5, подъе́зд 2, кварти́ра 48. Written short: ул. Ле́нина, д. 5, кв. 48.
Street names decline
На у́лице Ле́нина — on Lenin Street, with the street name in the genitive because it is “the street of Lenin”. Names that are adjectives agree instead: на Тверско́й у́лице. Both patterns are common and both are worth recognising.
What you hear back
Ле́нина, пять.Lenin Street, number five.
Я скину а́дрес.I’ll send you the address.
Э́то во второ́м подъе́зде.It’s in the second entrance.
Typical mistakes
Что а́дрес?
Како́й а́дрес?
Asking “which” uses како́й.
на у́лица Ле́нина
на у́лице Ле́нина
The prepositional for location.
Check yourself
Which is correct?
Како́й for “what / which”.