diff --git a/lib/resolv.rb b/lib/resolv.rb
index b69c704..7de3195 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -82,8 +82,8 @@ def self.each_name(address, &proc)
   ##
   # Creates a new Resolv using +resolvers+.
 
-  def initialize(resolvers=[Hosts.new, DNS.new])
-    @resolvers = resolvers
+  def initialize(resolvers=nil)
+    @resolvers = resolvers || default_resolvers
   end
 
   ##
@@ -152,6 +152,23 @@ def each_name(address)
     }
   end
 
+  private def default_resolvers # :nodoc:
+    resolvers = [Hosts.new, DNS.new]
+
+    # macOS supports multiple DNS resolvers via additional configs
+    # (e.g. local domain resolvers, VPNs, etc.)
+    # ref: `man 5 resolver` on macOS/darwin
+    if /darwin/ =~ RUBY_PLATFORM && Dir.exist?('/etc/resolver')
+      Dir.each_child('/etc/resolver') do |filename|
+        resolver = DNS::Config.parse_resolv_conf("/etc/resolver/#{filename}")
+        resolver[:search] = [filename] unless resolver[:search]
+        resolvers << DNS.new(resolver)
+      end
+    end
+
+    resolvers
+  end
+
   ##
   # Indicates a failure to resolve a name or address.
 
@@ -958,6 +975,7 @@ def Config.parse_resolv_conf(filename)
         nameserver = []
         search = nil
         ndots = 1
+        port = Port
         File.open(filename, 'rb') {|f|
           f.each {|line|
             line.sub!(/[#;].*/, '')
@@ -979,10 +997,20 @@ def Config.parse_resolv_conf(filename)
                   ndots = $1.to_i
                 end
               }
+            when 'port'
+              # Only valid for macOS
+              next unless /darwin/ =~ RUBY_PLATFORM
+              next if args.empty?
+              port = args[0].to_i
             end
           }
         }
-        return { :nameserver => nameserver, :search => search, :ndots => ndots }
+
+        return {
+          :nameserver_port => nameserver.to_enum(:each_with_index).map { |ns, i| [ns, port] },
+          :search => search,
+          :ndots => ndots
+        }
       end
 
       def Config.default_config_hash(filename="/etc/resolv.conf")
@@ -2907,4 +2935,3 @@ def DefaultResolver.replace_resolvers new_resolvers
   AddressRegex = /(?:#{IPv4::Regex})|(?:#{IPv6::Regex})/
 
 end
-
diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index 5171604..e7023c3 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -342,6 +342,23 @@ def test_resolv_conf_by_command
     end
   end
 
+  def test_macos_resolver_port
+    return unless /darwin/ =~ RUBY_PLATFORM
+
+    Tempfile.create('resolv_test_macos_resolver_port_') do |tmpfile|
+      tmpfile.puts "domain localdomain"
+      tmpfile.puts "nameserver 127.0.0.1"
+      tmpfile.puts "port 55353"
+      tmpfile.close
+      config_hash = Resolv::DNS::Config.parse_resolv_conf(tmpfile.path)
+      assert_equal({
+        :nameserver_port => [['127.0.0.1', 55353]],
+        :search => ['localdomain'],
+        :ndots => 1,
+      }, config_hash)
+    end
+  end
+
   def test_dots_diffences
     name1 = Resolv::DNS::Name.create("example.org")
     name2 = Resolv::DNS::Name.create("ex.ampl.eo.rg")