diff --git a/lib/hosters.js b/lib/hosters.js
index 1069243..b28c981 100644
--- a/lib/hosters.js
+++ b/lib/hosters.js
@@ -8,6 +8,7 @@ const API_TIMEOUT = 45000; // 45 seconds
 const SERVER_RETRY_ATTEMPTS = 6;
 const SERVER_RETRY_DELAY_MS = 2500;
 const LAST_UPLOAD_SERVERS = new Map();
+const TRUNCATED_UPLOAD_HOST = /(^|\.)filemoon$/i;
 
 function appendRawQuery(url, rawQuery) {
   const parsed = new URL(url);
@@ -79,6 +80,7 @@ function normalizeAbsoluteUrl(raw, apiBase) {
   try {
     const parsed = new URL(candidate);
     if (!['http:', 'https:'].includes(parsed.protocol)) return null;
+    if (TRUNCATED_UPLOAD_HOST.test(parsed.hostname)) return null;
     return parsed.href;
   } catch {
     return null;
diff --git a/tests/hosters.test.js b/tests/hosters.test.js
index 9f41eef..56b8ba5 100644
--- a/tests/hosters.test.js
+++ b/tests/hosters.test.js
@@ -32,6 +32,19 @@ describe('hosters helpers', () => {
     assert.equal(url, 'https://delivery-hydra.voe-network.net/upload/01');
   });
 
+  it('rejects byse truncated upload hosts (TLD dropped) so the lookup retries for a valid server', () => {
+    assert.equal(__test.extractUploadServerUrl({ result: 'https://s1065.filemoon/upload/01' }, 'https://api.byse.sx'), null);
+    assert.equal(__test.extractUploadServerUrl({ result: 's1070.filemoon' }, 'https://api.byse.sx'), null);
+    assert.equal(__test.extractUploadServerUrl({ result: 'https://filemoon/upload/01' }, 'https://api.byse.sx'), null);
+  });
+
+  it('keeps a complete byse upload host (real TLD present) untouched', () => {
+    assert.equal(
+      __test.extractUploadServerUrl({ result: 'https://s1065.filemoon.sx/upload/01' }, 'https://api.byse.sx'),
+      'https://s1065.filemoon.sx/upload/01'
+    );
+  });
+
   it('parseDoodstreamResult tolerates null/non-object payload without throwing', () => {
     // Direct callers may bypass uploadFile's normalisation. The parser must
     // never throw on bad input — empty fields are the contract.