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its the area code for the miami,florida area and lower.

Used by Rappers to refer to miami.. also called the MIA ( due to the fact that so many letters confuse them so they just use numbers)

also the most reconized area by the rap/hip-hop community
"305 till i die"

tourist ( to a ghetto miami person ):" where am i young man?"
ghetto miami person: " the 305 nigga "
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