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Home —→ Serangoon North Avenue 3 —→ Blk 21 Serangoon North Avenue 3, Singapore 555862.
Blk 21 Serangoon North Avenue 3 is a HDB block at the Singapore region of Serangoon.
Its block number is Blk 21, and it's in the street of Serangoon North Avenue 3 of Singapore.
Its postal code is 555862.