diff --git a/www/js/init-ndk.mjs b/www/js/init-ndk.mjs
index 9166a1b..155d319 100644
--- a/www/js/init-ndk.mjs
+++ b/www/js/init-ndk.mjs
@@ -392,6 +392,7 @@ function handleWorkerMessage(event) {
                 failed: message.failed,
                 latestRelay: message.latestRelay,
                 latestError: message.latestError,
+                relayUrls: message.relayUrls || [],
             }
         }));
     } else if (message.type === 'startupStatus') {
diff --git a/www/js/post-interactions.mjs b/www/js/post-interactions.mjs
index c853c06..d2332ad 100644
--- a/www/js/post-interactions.mjs
+++ b/www/js/post-interactions.mjs
@@ -917,43 +917,65 @@ export function formatTimeAgo(timestamp) {
 // Store timestamps for real-time updates
 const timeAgoElements = new Map(); // element -> { timestamp, eventId }
 
-// Track relay publish counts per event ID from broadcastProgress events.
-// Keyed by event ID → number of successful relay publishes.
-const relayCountByEventId = new Map();
+// Track relay publish info per event ID from broadcastProgress events.
+// Keyed by event ID → { count, urls } where urls is an array of relay URLs.
+const relayInfoByEventId = new Map();
 
-// Listen for broadcast progress events to capture final relay counts.
+// Listen for broadcast progress events to capture final relay counts and URLs.
 // The worker emits ndkBroadcastProgress with phase 'done' containing the
-// total successful count. We store it so post cards can show "21r - 1h".
+// total successful count and the list of relay URLs. We store it so post
+// cards can show "21r - 1h" with a hover tooltip listing the relays.
 if (typeof window !== 'undefined') {
     window.addEventListener('ndkBroadcastProgress', (event) => {
         const d = event.detail;
         if (!d || d.phase !== 'done') return;
         const eventId = d.eventId;
         if (!eventId) return;
-        relayCountByEventId.set(eventId, d.successful || 0);
+        relayInfoByEventId.set(eventId, {
+            count: d.successful || 0,
+            urls: Array.isArray(d.relayUrls) ? d.relayUrls : [],
+        });
         // Update any already-rendered time elements for this event.
         timeAgoElements.forEach((info, element) => {
             if (info.eventId === eventId && element.isConnected) {
-                element.textContent = formatTimeAgoWithRelays(info.timestamp, info.eventId);
+                updateTimeAgoElement(element, info);
             }
         });
     });
 }
 
 /**
- * Format time ago with optional relay count prefix.
- * Shows "21r - 1h" when a relay count is available, else just "1h".
- * @param {number} timestamp - Unix timestamp in seconds
- * @param {string} [eventId] - Optional event ID to look up relay count
+ * Build the hover tooltip text for a relay list.
+ * Shows "Published to N relays:" followed by the URL list, truncated.
+ * @param {number} count - Number of successful relays
+ * @param {string[]} urls - Array of relay URLs
  * @returns {string}
  */
-function formatTimeAgoWithRelays(timestamp, eventId) {
-    const timeStr = formatTimeAgo(timestamp);
-    if (eventId && relayCountByEventId.has(eventId)) {
-        const count = relayCountByEventId.get(eventId);
-        return `${count}r - ${timeStr}`;
+function buildRelayTooltip(count, urls) {
+    if (!count || count === 0) return '';
+    const header = `Published to ${count} relay${count === 1 ? '' : 's'}:`;
+    if (!urls || urls.length === 0) return header;
+    // Show up to 50 relay URLs in the tooltip; beyond that, show a summary.
+    if (urls.length <= 50) {
+        return header + '\n' + urls.join('\n');
+    }
+    return header + '\n' + urls.slice(0, 50).join('\n') + `\n… and ${urls.length - 50} more`;
+}
+
+/**
+ * Update a time-ago element's text and tooltip from its stored info.
+ * @param {HTMLElement} element - The element to update
+ * @param {{timestamp: number, eventId: string}} info - Stored info
+ */
+function updateTimeAgoElement(element, info) {
+    const timeStr = formatTimeAgo(info.timestamp);
+    if (info.eventId && relayInfoByEventId.has(info.eventId)) {
+        const relayInfo = relayInfoByEventId.get(info.eventId);
+        element.textContent = `${relayInfo.count}r - ${timeStr}`;
+        element.title = buildRelayTooltip(relayInfo.count, relayInfo.urls);
+    } else {
+        element.textContent = timeStr;
     }
-    return timeStr;
 }
 
 /**
@@ -964,7 +986,7 @@ function formatTimeAgoWithRelays(timestamp, eventId) {
  */
 export function registerTimeAgo(element, timestamp, eventId) {
     timeAgoElements.set(element, { timestamp, eventId });
-    element.textContent = formatTimeAgoWithRelays(timestamp, eventId);
+    updateTimeAgoElement(element, { timestamp, eventId });
 }
 
 /**
@@ -974,7 +996,7 @@ export function registerTimeAgo(element, timestamp, eventId) {
 export function updateTimeAgos() {
     timeAgoElements.forEach((info, element) => {
         if (element.isConnected) {
-            element.textContent = formatTimeAgoWithRelays(info.timestamp, info.eventId);
+            updateTimeAgoElement(element, info);
         } else {
             // Clean up detached elements
             timeAgoElements.delete(element);
diff --git a/www/js/version.json b/www/js/version.json
index ed0ad9c..712b981 100644
--- a/www/js/version.json
+++ b/www/js/version.json
@@ -1,5 +1,5 @@
 {
-  "VERSION": "v0.7.71",
-  "VERSION_NUMBER": "0.7.71",
-  "BUILD_DATE": "2026-06-30T13:33:08.793Z"
+  "VERSION": "v0.7.72",
+  "VERSION_NUMBER": "0.7.72",
+  "BUILD_DATE": "2026-06-30T13:37:36.886Z"
 }
diff --git a/www/ndk-worker.js b/www/ndk-worker.js
index 3745e97..39d52c0 100644
--- a/www/ndk-worker.js
+++ b/www/ndk-worker.js
@@ -6315,6 +6315,7 @@ async function handlePublish(requestId, event, port) {
                 successful: publishedSoFar.size,
                 failed: totalFailed,
                 latestRelay: null,
+                relayUrls: Array.from(publishedSoFar),
             });
             // Clean up listeners so the NDKEvent can be garbage-collected.
             try {
@@ -6330,6 +6331,9 @@ async function handlePublish(requestId, event, port) {
         // We use the relaySet result to count successful relays.
         if (!isBroadcast) {
             const successCount = relaySet ? relaySet.size : 0;
+            const successUrls = relaySet
+                ? Array.from(relaySet).map(r => r?.url || '').filter(Boolean)
+                : [];
             broadcast({
                 type: 'broadcastProgress',
                 sessionId: publishSessionId,
@@ -6340,6 +6344,7 @@ async function handlePublish(requestId, event, port) {
                 successful: successCount,
                 failed: 0,
                 latestRelay: null,
+                relayUrls: successUrls,
             });
         }