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Home —→ Lorong 4 Toa Payoh —→ Blk 640 Lorong 4 Toa Payoh, Singapore 319522.
Blk 640 Lorong 4 Toa Payoh is a HDB block at the Singapore region of Toa Payoh.
Its block number is Blk 640, and it's in the street of Lorong 4 Toa Payoh of Singapore.
Its postal code is 319522.