diff --git a/award-definitions/dld.json b/award-definitions/dld.json
new file mode 100644
index 0000000..91770f6
--- /dev/null
+++ b/award-definitions/dld.json
@@ -0,0 +1,13 @@
+{
+  "id": "dld",
+  "name": "DLD",
+  "description": "Deutschland Diplom - Confirm 100 unique DOKs on different bands/modes",
+  "caption": "Contact and confirm stations with 100 unique DOKs (DARC Ortsverband Kennung) on different band/mode combinations. Each unique DOK on a unique band/mode counts as one point. Only DCL-confirmed QSOs with valid DOK information count toward this award.",
+  "category": "darc",
+  "rules": {
+    "type": "dok",
+    "target": 100,
+    "confirmationType": "dcl",
+    "displayField": "darcDok"
+  }
+}
diff --git a/src/backend/services/awards.service.js b/src/backend/services/awards.service.js
index 02ea817..0423bcd 100644
--- a/src/backend/services/awards.service.js
+++ b/src/backend/services/awards.service.js
@@ -26,6 +26,7 @@ function loadAwardDefinitions() {
       'vucc-sat.json',
       'sat-rs44.json',
       'special-stations.json',
+      'dld.json',
     ];
 
     for (const file of files) {
@@ -108,6 +109,11 @@ export async function calculateAwardProgress(userId, award, options = {}) {
     hasFilters: !!rules.filters,
   });
 
+  // Handle DOK-based awards (DLD)
+  if (rules.type === 'dok') {
+    return calculateDOKAwardProgress(userId, award, { includeDetails });
+  }
+
   // Handle point-based awards
   if (rules.type === 'points') {
     return calculatePointsAwardProgress(userId, award, { includeDetails });
@@ -156,6 +162,111 @@ export async function calculateAwardProgress(userId, award, options = {}) {
   };
 }
 
+/**
+ * Calculate progress for DOK-based awards (DLD)
+ * Counts unique (DOK, band, mode) combinations with DCL confirmation
+ * @param {number} userId - User ID
+ * @param {Object} award - Award definition
+ * @param {Object} options - Options
+ * @param {boolean} options.includeDetails - Include detailed entity breakdown
+ */
+async function calculateDOKAwardProgress(userId, award, options = {}) {
+  const { includeDetails = false } = options;
+  const { rules } = award;
+  const { target, displayField } = rules;
+
+  logger.debug('Calculating DOK-based award progress', { userId, awardId: award.id, target });
+
+  // Get all QSOs for user
+  const allQSOs = await db
+    .select()
+    .from(qsos)
+    .where(eq(qsos.userId, userId));
+
+  logger.debug('Total QSOs for user', { count: allQSOs.length });
+
+  // Track unique (DOK, band, mode) combinations
+  const dokCombinations = new Map(); // Key: "DOK/band/mode" -> detail object
+
+  for (const qso of allQSOs) {
+    const dok = qso.darcDok;
+    if (!dok) continue; // Skip QSOs without DOK
+
+    const band = qso.band || 'Unknown';
+    const mode = qso.mode || 'Unknown';
+    const combinationKey = `${dok}/${band}/${mode}`;
+
+    // Initialize combination if not exists
+    if (!dokCombinations.has(combinationKey)) {
+      dokCombinations.set(combinationKey, {
+        entity: dok,
+        entityId: null,
+        entityName: dok,
+        band,
+        mode,
+        worked: false,
+        confirmed: false,
+        qsoDate: qso.qsoDate,
+        dclQslRdate: null,
+      });
+    }
+
+    const detail = dokCombinations.get(combinationKey);
+    detail.worked = true;
+
+    // Check for DCL confirmation
+    if (qso.dclQslRstatus === 'Y') {
+      if (!detail.confirmed) {
+        detail.confirmed = true;
+        detail.dclQslRdate = qso.dclQslRdate;
+      }
+    }
+  }
+
+  const workedDOKs = new Set();
+  const confirmedDOKs = new Set();
+
+  for (const [key, detail] of dokCombinations) {
+    const dok = detail.entity;
+    workedDOKs.add(dok);
+    if (detail.confirmed) {
+      confirmedDOKs.add(dok);
+    }
+  }
+
+  logger.debug('DOK award progress', {
+    workedDOKs: workedDOKs.size,
+    confirmedDOKs: confirmedDOKs.size,
+    target,
+  });
+
+  // Base result
+  const result = {
+    worked: workedDOKs.size,
+    confirmed: confirmedDOKs.size,
+    target: target || 0,
+    percentage: target ? Math.round((confirmedDOKs.size / target) * 100) : 0,
+    workedEntities: Array.from(workedDOKs),
+    confirmedEntities: Array.from(confirmedDOKs),
+  };
+
+  // Add details if requested
+  if (includeDetails) {
+    result.award = {
+      id: award.id,
+      name: award.name,
+      description: award.description,
+      caption: award.caption,
+      target: target || 0,
+    };
+    result.entities = Array.from(dokCombinations.values());
+    result.total = result.entities.length;
+    result.confirmed = result.entities.filter((e) => e.confirmed).length;
+  }
+
+  return result;
+}
+
 /**
  * Calculate progress for point-based awards
  * countMode determines how points are counted:
@@ -510,6 +621,11 @@ export async function getAwardEntityBreakdown(userId, awardId) {
     };
   }
 
+  // Handle DOK-based awards - use the dedicated function
+  if (rules.type === 'dok') {
+    return await calculateDOKAwardProgress(userId, award, { includeDetails: true });
+  }
+
   // Handle point-based awards - use the unified function
   if (rules.type === 'points') {
     return await calculatePointsAwardProgress(userId, award, { includeDetails: true });