diff --git a/aprslib/parsing/__init__.py b/aprslib/parsing/__init__.py
index ec592a7..e8e37c4 100644
--- a/aprslib/parsing/__init__.py
+++ b/aprslib/parsing/__init__.py
@@ -44,6 +44,25 @@ from aprslib.parsing.telemetry import *
 from aprslib.parsing.thirdparty import *
 from aprslib.parsing.weather import *
 
+unsupported_formats = {
+        '#':'raw weather report',
+        '$':'raw gps',
+        '%':'agrelo',
+        '&':'reserved',
+        '(':'unused',
+        ')':'item report',
+        '*':'complete weather report',
+        '+':'reserved',
+        '-':'unused',
+        '.':'reserved',
+        '<':'station capabilities',
+        '?':'general query format',
+        'T':'telemetry report',
+        '[':'maidenhead locator beacon',
+        '\\':'unused',
+        ']':'unused',
+        '^':'unused',
+}
 
 def _unicode_packet(packet):
     # attempt utf-8
@@ -139,27 +158,8 @@ def parse(packet):
 def _try_toparse_body(packet_type, body, parsed):
     result = {}
 
-    # NOT SUPPORTED FORMATS
-    #
-    # # - raw weather report
-    # $ - raw gps
-    # % - agrelo
-    # & - reserved
-    # ( - unused
-    # ) - item report
-    # * - complete weather report
-    # + - reserved
-    # - - unused
-    # . - reserved
-    # < - station capabilities
-    # ? - general query format
-    # T - telemetry report
-    # [ - maidenhead locator beacon
-    # \ - unused
-    # ] - unused
-    # ^ - unused
-    if packet_type in '#$%)*<?T[':
-        raise UnknownFormat("format is not supported")
+    if packet_type in unsupported_formats:
+        raise UnknownFormat("Format is not supported: '{}' {}".format(packet_type, unsupported_formats[packet_type]))
 
     # 3rd party traffic
     elif packet_type == '}':
diff --git a/tests/test_parse.py b/tests/test_parse.py
index 62ce882..258dd29 100644
--- a/tests/test_parse.py
+++ b/tests/test_parse.py
@@ -65,8 +65,8 @@ class ParseTestCase(unittest.TestCase):
             self.fail("empty status packet shouldn't raise exception")
 
     def test_unsupported_formats_raising(self):
-        with self.assertRaises(UnknownFormat):
-            for packet_type in '#$%)*,<?T[_{':
+        for packet_type in parsing.unsupported_formats:
+            with self.assertRaises(UnknownFormat):
                 packet = "A>B:%saaa" % packet_type
 
                 try: