diff --git a/CHANGELOG.md b/CHANGELOG.md
index 51a99e0..f682817 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,9 @@ All notable changes to `OWNd` are documented in this file.
   - Canonical `libqtdevices` (`TS10_1_0_23`) coarse `WHAT 2..10` $\leftrightarrow$ fine `1..100%` conversion helpers (`COARSE_PRESET_TO_PERCENT`, `brightness_preset_to_percent`, `percent_to_brightness_preset`), `OWNLightingEvent.is_coarse_dimmer`, `OWNLightingEvent.brightness_preset_percent`, and `OWNLightingCommand.set_brightness(..., coarse=..., gateway=...)` (`#134`).
   - `WHAT 39` end of movement (`*1*39*WHERE##`) from WHO 1 motion detectors: `message_type` `motion_detected` with `motion` `False`, new `OWNLightingEvent.motion_end`, `is_sensor` `True`, `is_on` `None`. It was `unknown_state` `39` before (`MyHOME#777`).
 
+### Fixed
+- **WHO 1 (`normalize_where`)**: a 4-digit point address of area 0 (`0004`, `0007#4#01`) normalises to its 2-digit form (`04`, `07#4#01`), the one gateways accept and report: `*#1*0001##` / `*1*1*0001##` are `nack`/`silent` on 11 of 12 emulated gateways (own-firmware-oracle `lights-area0`) and on a live F461 2.0.11, and the MH202 reports the light as `01`. Other 4-digit inputs (`0109`, `0010`) stay as typed (`#123`, `MyHOME#147`).
+
 ## [2.0.0b11] - 2026-10-20
 
 ### Added
diff --git a/OWNd/message/lighting.py b/OWNd/message/lighting.py
index 0c4352f..6da9cb4 100644
--- a/OWNd/message/lighting.py
+++ b/OWNd/message/lighting.py
@@ -157,7 +157,20 @@ def normalize_where(where: str | int | None) -> str:
         return ""
     parts = where_str.split("#", 1)
     base = parts[0]
-    if is_apl_address(base) or base in ("00", "100", "0"):
+    if (
+        len(base) == 4
+        and base.isdigit()
+        and base[:3] == "000"
+        and base[3] != "0"
+    ):
+        # Area 0, PL 1..9 spelled with four digits (0004) is canonically
+        # 04: `*#1*0001##` and `*1*1*0001##` are nack/silent on 11 of the 12
+        # emulated gateways (own-firmware-oracle lights-area0) and the one
+        # that ACKs them, the MH202, reports the light as `01`
+        # (`*1*1000#1*01##`); a live F461 2.0.11 NACKs `0001` and ACKs `01`.
+        # Any other 4-digit input (0109, 0209) is left as typed (OWNd#123).
+        norm_base = f"{base[1]}{base[3]}"
+    elif is_apl_address(base) or base in ("00", "100", "0"):
         norm_base = base
     elif base.isdigit() and base.startswith("00") and int(base) > 15:
         norm_base = str(int(base))
diff --git a/tests/test_who1_ts10_builders.py b/tests/test_who1_ts10_builders.py
index 7069ead..d9f960c 100644
--- a/tests/test_who1_ts10_builders.py
+++ b/tests/test_who1_ts10_builders.py
@@ -78,6 +78,42 @@ def test_apl_addressing_helpers():
     assert normalize_where("   ") == ""
 
 
+@pytest.mark.parametrize(
+    ("where", "expected"),
+    [
+        # Area 0, PL 1..9 written on 4 digits: `*#1*0001##` is nack/silent on
+        # 11 of the 12 emulated gateways (own-firmware-oracle lights-area0),
+        # and the MH202, which ACKs it, reports the light as `01`.
+        ("0004", "04"),
+        ("0001", "01"),
+        ("0007#4#01", "07#4#01"),
+        # Any other 4-digit input is left as typed (OWNd#123).
+        ("0109", "0109"),
+        ("0209", "0209"),
+        ("0809", "0809"),
+        ("0901", "0901"),
+        # Real 4-digit addresses stay as written (the MH202 echoes 0010 as 0010).
+        ("0010", "0010"),
+        ("0015", "0015"),
+        ("0112", "0112"),
+        ("1015", "1015"),
+        ("1001", "1001"),
+        # Not point addresses, or already canonical.
+        ("0000", "0000"),
+        ("0900", "0900"),
+        ("04", "04"),
+        ("29", "29"),
+        ("00", "00"),
+        ("0", "0"),
+        ("#0004", "#0004"),
+    ],
+)
+def test_normalize_where_canonicalises_area_0_four_digit_points(where, expected):
+    from OWNd.message import normalize_where
+
+    assert normalize_where(where) == expected
+
+
 def test_lighting_dimension_properties():
     from OWNd.message import OWNLightingEvent, OWNMessage