diff --git a/CHANGES b/CHANGES
index c3823d65..f010bf19 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,8 @@
 Unreleased
 ----------
 
+* Fixed matching and passthrough registration for Unicode hostnames with ports
+  or userinfo, preserving credentials and ports during hostname encoding.
 * Fixed ``fragment_identifier_matcher`` ignoring blank-valued fragment
   parameters, which allowed missing or different parameters to match.
 * Added Python 3.14 support (classifiers, tox envlist, and CI test matrix). See #810
diff --git a/responses/__init__.py b/responses/__init__.py
index 5b1546a3..3a2442af 100644
--- a/responses/__init__.py
+++ b/responses/__init__.py
@@ -189,12 +189,15 @@ def _clean_unicode(url: str) -> str:
     urllist = list(urlsplit(url))
     netloc = urllist[1]
     if _has_unicode(netloc):
-        domains = netloc.split(".")
+        # Encode only the hostname, keeping userinfo and the port out of punycode.
+        userinfo, at, hostport = netloc.rpartition("@")
+        host, colon, port = hostport.partition(":")
+        domains = host.split(".")
         for i, d in enumerate(domains):
             if _has_unicode(d):
                 d = "xn--" + d.encode("punycode").decode("ascii")
                 domains[i] = d
-        urllist[1] = ".".join(domains)
+        urllist[1] = userinfo + at + ".".join(domains) + colon + port
         url = urlunsplit(urllist)
 
     # Clean up path/query/params, which use url-encoding to handle unicode chars
diff --git a/responses/tests/test_responses.py b/responses/tests/test_responses.py
index bc8f1e04..fac069b8 100644
--- a/responses/tests/test_responses.py
+++ b/responses/tests/test_responses.py
@@ -1387,6 +1387,77 @@ def run():
     assert_reset()
 
 
+@pytest.mark.parametrize(
+    "url",
+    [
+        "https://example.рф:8443/path",
+        "https://пример.рф:8443/path",
+        "https://user:pass@пример.рф/path",
+        "https://user:pass@пример.рф:8443/path",
+        "https://üser:päss@example.com:8443/path",
+        "https://üser:päss@пример.рф:8443/path",
+        "https://пример.рф:8443/путь?key=значение",
+        "https://пример.рф/path",
+        "https://user:pass@example.com:8443/path",
+        "https://üser:päss@[::1]:8443/path",
+    ],
+)
+def test_unicode_url_authority(url):  # type: ignore[misc]
+    with responses.RequestsMock() as mock:
+        mock.get(url, body="matched")
+
+        response = requests.get(url)
+
+        assert_response(response, "matched")
+        assert len(mock.calls) == 1
+
+
+@pytest.mark.parametrize(
+    ("prefix", "expected"),
+    [
+        ("https://пример.рф:8443", "https://xn--e1afmkfd.xn--p1ai:8443"),
+        (
+            "https://user:pass@пример.рф:8443/path",
+            "https://user:pass@xn--e1afmkfd.xn--p1ai:8443/path",
+        ),
+        (
+            "https://üser:päss@example.com:8443/path",
+            "https://%C3%BCser:p%C3%A4ss@example.com:8443/path",
+        ),
+    ],
+)
+def test_unicode_authority_passthru(prefix, expected):  # type: ignore[misc]
+    real_send = Mock(return_value=requests.Response())
+    with responses.RequestsMock(real_adapter_send=real_send) as mock:
+        mock.add_passthru(prefix)
+        assert mock.passthru_prefixes == (expected,)
+
+        requests.get(prefix + "/child")
+
+        real_send.assert_called_once()
+        assert real_send.call_args[0][1].url == expected + "/child"
+
+
+@pytest.mark.parametrize(
+    "url",
+    [
+        "https://user:pass@пример.рф:8444/path",
+        "https://other:pass@пример.рф:8443/path",
+        "https://user:other@пример.рф:8443/path",
+        "https://user:pass@пример.рф:8443/other",
+    ],
+)
+def test_unicode_authority_keeps_url_components_significant(url):  # type: ignore[misc]
+    response = responses.Response(
+        responses.GET, "https://user:pass@пример.рф:8443/path"
+    )
+
+    matched, reason = response.matches(requests.Request("GET", url).prepare())
+
+    assert not matched
+    assert reason == "URL does not match"
+
+
 def test_handles_unicode_body():
     url = "http://example.com/test"