diff --git a/bk/prefix/as4837.txt b/bk/prefix/as4837.txt
index 255f0aa..226088c 100644
--- a/bk/prefix/as4837.txt
+++ b/bk/prefix/as4837.txt
@@ -73,7 +73,9 @@
 2408:8000:8020::/48
 2408:8000:8030::/48
 2408:8000:8040::/48
+2408:8000:8050::/48
 2408:8000:8060::/48
+2408:8000:8070::/48
 2408:8000:8080::/48
 2408:8000:8090::/48
 2408:8000:80a0::/48
@@ -563,7 +565,11 @@
 2408:876c:1700::/44
 2408:876c:1740::/44
 2408:876c:17c0::/44
+2408:876c:40::/48
+2408:876c:80::/48
 2408:876c::/32
+2408:876c::/48
+2408:876c:c0::/48
 2408:876d::/32
 2408:876e::/32
 2408:876f::/32
diff --git a/bk/prefix/as4837.txt.manifest.json b/bk/prefix/as4837.txt.manifest.json
index c05fee2..6dca140 100644
--- a/bk/prefix/as4837.txt.manifest.json
+++ b/bk/prefix/as4837.txt.manifest.json
@@ -1,7 +1,7 @@
 {
   "schema": "backtrace.asn-prefixes/v1",
   "file": "as4837.txt",
-  "count": 645,
-  "sha256": "ebced2599e24fa5bc50891b29b1557cbf69a48963dc370bdda4ed7992ba789c2",
-  "generated_at": "2026-09-01T04:09:41Z"
+  "count": 651,
+  "sha256": "9ccc394917b267ddca604f302a26d1ac0c55c844cf2ceec281431dad56b6bcc1",
+  "generated_at": "2026-09-02T03:32:25Z"
 }