diff --git a/all/ipv6.txt b/all/ipv6.txt
index 648bf0b2..7fef2618 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -3273,7 +3273,7 @@
 2406:da00:800::/40
 2406:da00:1000::/40
 2406:da00:2000::/40
-2406:da00:2800::/64
+2406:da00:2800::/40
 2406:da00:4000::/40
 2406:da00:4800::/40
 2406:da00:6000::/40
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index 69092ab2..0765f545 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -498,7 +498,7 @@
 2406:da00:800::/40
 2406:da00:1000::/40
 2406:da00:2000::/40
-2406:da00:2800::/64
+2406:da00:2800::/40
 2406:da00:4000::/40
 2406:da00:4800::/40
 2406:da00:6000::/40
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index f8541be1..e7f3e44a 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -461,7 +461,7 @@
 2406:da00:800::/40
 2406:da00:1000::/40
 2406:da00:2000::/40
-2406:da00:2800::/64
+2406:da00:2800::/40
 2406:da00:4000::/40
 2406:da00:4800::/40
 2406:da00:6000::/40
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index dd527fb3..d840f272 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -367,7 +367,7 @@
 2406:da00:800::/40
 2406:da00:1000::/40
 2406:da00:2000::/40
-2406:da00:2800::/64
+2406:da00:2800::/40
 2406:da00:4000::/40
 2406:da00:4800::/40
 2406:da00:6000::/40