What is the postal code for 18647 St. Andrews Road in Caledon Ontario?

2016 Celeste St Innisfil, ON L9S 4Z6, Canada

and what mental illness is preventing you from google that:

postal code canada ontario alnes rd

or at least give canada post a chance:
https://www.canadapost.ca/cpo/mc/personal/postalcode/fpc.jsf

just try to use all three of your brain cells before you ask that sort of the question...

There are multiple units at this address. Postal code for unit 103 is
103-237 BARTON ST E
HAMILTON ON L8L 2X2

766 SULPHUR SPRINGS RD
DUNDAS ON L9H 5E3

There are multiple units at this address. The postal code for unit 101 is:
101-40 BOTELER ST
OTTAWA ON K1N 9C8

254 MCNAUGHTON ST
SUDBURY ON P3E 1V5

1003 WARWICK ST
WOODSTOCK ON N4S 4S3 CANADA (note accepted abbreviations for Street and Ontario)
from:
http://www.canadapost.ca/cpo/mc/personal/postalcode/fpc.jsf#

Go to the postal code page of Post Canada, and type in the full address. Here is the link.

Canada Post Find Postal Code Personal Look up and Search Postal Codes...

Go to the www.postcanada.ca > Find a postal code. Enter the full address and get the code.
http://www.postcanada.ca/

1474 HUNT ST
SARNIA ON N7S 3M7