diff --git a/docs/source/changelog.rst b/docs/source/changelog.rst
index 849eb6e..3ab052b 100644
--- a/docs/source/changelog.rst
+++ b/docs/source/changelog.rst
@@ -1,6 +1,13 @@
 Changelog
 ---------
 
+PyHamtools 0.8.6
+================
+
+26. December 2022
+
+* fixed regex regression for detection two-by-one callsigns
+
 PyHamtools 0.8.5
 ================
 
diff --git a/pyhamtools/callinfo.py b/pyhamtools/callinfo.py
index 0128d43..bde9959 100644
--- a/pyhamtools/callinfo.py
+++ b/pyhamtools/callinfo.py
@@ -205,7 +205,8 @@ class Callinfo(object):
                     return self._iterate_prefix(callsign, timestamp)
 
             # regular callsigns, without prefix or appendix
-            elif re.match('^[\\d]{0,1}[A-Z]{1,2}\\d{1,2}[A-Z]{1,2}([A-Z]{1,4}|\\d{1,3})[A-Z]{0,5}$', callsign):
+            # elif re.match('^[\\d]{0,1}[A-Z]{1,2}\\d{1,2}[A-Z]{1,2}([A-Z]{1,4}|\\d{1,3})[A-Z]{0,5}$', callsign):
+            elif re.match('^[\\d]{0,1}[A-Z]{1,2}\\d{1,4}([A-Z]{1,4}|[A-Z]{1,2}\\d{0,3})[A-Z]{0,5}$', callsign):
                 return self._iterate_prefix(callsign, timestamp)
 
             # callsigns with prefixes (xxx/callsign)
diff --git a/pyhamtools/version.py b/pyhamtools/version.py
index f694b15..b1e93a7 100644
--- a/pyhamtools/version.py
+++ b/pyhamtools/version.py
@@ -1,3 +1,3 @@
-VERSION = (0, 8, 5)
+VERSION = (0, 8, 6)
 __release__ = ''.join(['-.'[type(x) == int]+str(x) for x in VERSION])[1:]
 __version__ = '.'.join((str(VERSION[0]), str(VERSION[1])))
diff --git a/test/test_callinfo.py b/test/test_callinfo.py
index aa974d7..1fd11cc 100644
--- a/test/test_callinfo.py
+++ b/test/test_callinfo.py
@@ -18,6 +18,15 @@ response_prefix_DH_clublog = {
     'cqz': 14,
 }
 
+response_prefix_OE_clublog = {
+    'country': 'AUSTRIA',
+    'adif': 206,
+    'continent': 'EU',
+    'latitude': 47.3,
+    'longitude': 13.3,
+    'cqz': 15,
+}
+
 response_prefix_DH_countryfile = {
     'country': 'Fed. Rep. of Germany',
     'adif': 230,
@@ -84,6 +93,33 @@ response_prefix_VK9DLX_clublog = {
     u'longitude': 159.1
 }
 
+response_prefix_TA7I_clublog = {
+    u'adif': 390,
+    u'continent': u'AS',
+    u'country': u'TURKEY',
+    u'cqz': 20,
+    u'latitude': 40.0,
+    u'longitude': 33.0
+}
+
+response_prefix_W2T_clublog = {
+    u'adif': 291,
+    u'continent': u'NA',
+    u'country': u'UNITED STATES OF AMERICA',
+    u'cqz': 5,
+    u'latitude': 43.0,
+    u'longitude': -87.9
+}
+
+response_prefix_V26K_clublog = {
+    u'adif': 94,
+    u'continent': u'NA',
+    u'country': u'ANTIGUA & BARBUDA',
+    u'cqz': 8,
+    u'latitude': 17.1,
+    u'longitude': -61.8
+}
+
 response_prefix_VK9DLX_countryfile = {
      u'adif': 147,
      u'continent': u'OC',
@@ -249,6 +285,15 @@ class Test_callinfo_methods:
             assert fix_callinfo._dismantle_callsign("DH1TW/M") == response_prefix_DH_clublog
             assert fix_callinfo._dismantle_callsign("DH1TW/B")[const.BEACON]
             assert fix_callinfo._dismantle_callsign("DH1TW") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("DA2X") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("DN1BU") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("OE50SPUTNIK") == response_prefix_OE_clublog
+            assert fix_callinfo._dismantle_callsign("DL60LINDAU") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("DP75HILDE") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("DL1640Y") == response_prefix_DH_clublog
+            assert fix_callinfo._dismantle_callsign("V26K") == response_prefix_V26K_clublog
+            assert fix_callinfo._dismantle_callsign("W2T") == response_prefix_W2T_clublog
+            assert fix_callinfo._dismantle_callsign("TA7I") == response_prefix_TA7I_clublog
             assert fix_callinfo._dismantle_callsign("DP44N44T") == response_prefix_DH_clublog
             assert fix_callinfo._dismantle_callsign("DL/HC2AO") == response_prefix_DH_clublog
             assert fix_callinfo._dismantle_callsign("9H5A/C6A") == response_prefix_C6A_clublog
@@ -265,6 +310,8 @@ class Test_callinfo_methods:
 
             with pytest.raises(KeyError):
                 fix_callinfo._dismantle_callsign("OZ/JO85")
+            with pytest.raises(KeyError):
+                fix_callinfo._dismantle_callsign("DL")
 
         if fix_callinfo._lookuplib._lookuptype == "countryfile":
             assert fix_callinfo._dismantle_callsign("DH1TW/QRP") == response_prefix_DH_countryfile