if you are looking for the visa office this is how you will know it :
Write an e-mail to cpc-ctd-Ottawa@cic.gc.ca
Write a subject such as : Visa Office - Enquiry
I would like to know the Visa office where my Express Entry application (E0xxxxxxxxxxxx) is being processed?
My credentials are: Application number: E000 xxxxxxxx Express entry profile number
Date of Birth: Last Name Principal Applicant: First Name Principal Applicant: Federal Skilled Worker Program
Thank you. Regards