diff --git a/src/blackmisc/aviation/callsign.cpp b/src/blackmisc/aviation/callsign.cpp
index aefffc8c5..501e00984 100644
--- a/src/blackmisc/aviation/callsign.cpp
+++ b/src/blackmisc/aviation/callsign.cpp
@@ -161,6 +161,12 @@ namespace BlackMisc
             return this->getStringAsSet().contains('_');
         }
 
+        bool CCallsign::hasAtcSuffix() const
+        {
+            const QString s = this->getSuffix();
+            return !s.isEmpty() && atcCallsignSuffixes().contains(s);
+        }
+
         bool CCallsign::equalsString(const QString &callsignString) const
         {
             CCallsign other(callsignString);
diff --git a/src/blackmisc/aviation/callsign.h b/src/blackmisc/aviation/callsign.h
index ac784eb28..a865dfb6e 100644
--- a/src/blackmisc/aviation/callsign.h
+++ b/src/blackmisc/aviation/callsign.h
@@ -117,6 +117,9 @@ namespace BlackMisc
             //! Suffix such as "_TWR"?
             bool hasSuffix() const;
 
+            //! Has an ATC suffix?
+            bool hasAtcSuffix() const;
+
             //! Equals callsign string?
             bool equalsString(const QString &callsignString) const;