How can I find the contact information for the landlord of an apartment bulding if it is not listed onsite?

A tenant in the apartment building next to mine has two loud dogs and I would like to complain to the landlord. I would prefer to not have to ask another tenant in that building for the information.How can I find the contact information for the landlord of an apartment bulding if it is not listed onsite?Your county tax records may be on file or google the address and see if they advertise.How can I find the contact information for the landlord of an apartment bulding if it is not listed onsite?Ask whoever you pay the rent to