diff --git a/app/controllers/epp/contacts_controller.rb b/app/controllers/epp/contacts_controller.rb
index a0c3f503f..65354ff48 100644
--- a/app/controllers/epp/contacts_controller.rb
+++ b/app/controllers/epp/contacts_controller.rb
@@ -14,7 +14,7 @@ module Epp
       authorize! :check, Epp::Contact
 
       ids = params[:parsed_frame].css('id').map(&:text)
-      @results = Epp::Contact.check_availability(ids)
+      @results = Epp::Contact.check_availability(ids, reg: current_user.registrar.code)
       render_epp_response '/epp/contacts/check'
     end
 
diff --git a/app/models/epp/contact.rb b/app/models/epp/contact.rb
index 50ebac065..edc828f81 100644
--- a/app/models/epp/contact.rb
+++ b/app/models/epp/contact.rb
@@ -42,8 +42,9 @@ class Epp::Contact < Contact
       )
     end
 
-    def check_availability(codes)
+    def check_availability(codes, reg:)
       codes = [codes] if codes.is_a?(String)
+      codes = codes.map { |c| c.include?(':') ? c : "#{reg}:#{c}" }
 
       res = []
       codes.each do |x|