There is no area code 354 in Florida, nor anywhere else in North America (USA, Canada, etc.).
The country code and area code of Atapan, Mexico is 52, (01)354.
The country code and area code of Yozgat, Turkey is 90, (0)354.
The country code and area code of Pintado, Uruguay is 598, (0)354.
You didn't. A telemarketer is spoofing the caller ID. This should be grounds for capital punishment, but unfortunately it's not. Just don't answer them. It is also possible that the call came from country code +354 (Iceland) rather than area code 354 (unassigned).
The country code and area code of Yuci- SX, China is 86, (0)354.
Brooksville, Florida, is in area code 352.
Poinciana, Florida, is in area code 407, with overlay area code 321.
Country code +354 is Iceland.
Lake Sherwood, Florida, is in area code 407 with overlay area code 321.
Ft Pierce, FL, is in area code 772.
Marco Island, Florida, is in area code 239.