diff --git a/all/ipv6.txt b/all/ipv6.txt
index 8be7c374..97e776f3 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -236372,7 +236372,6 @@
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/56
 2600:1f01:4900:300::/56
-2600:1f01:4900:400::/56
 2600:1f01:4900:500::/56
 2600:1f01:4900:600::/56
 2600:1f01:4900:700::/56
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index dbbf31f9..fd63c96d 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -11484,7 +11484,8 @@
 2600:1f01:4890::/47
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/55
-2600:1f01:4900:400::/54
+2600:1f01:4900:500::/56
+2600:1f01:4900:600::/55
 2600:1f01:4900:800::/54
 2600:1f01:4902:100::/56
 2600:1f01:4902::/63
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index f35e7cab..8de8a98e 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -1315,7 +1315,6 @@
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/56
 2600:1f01:4900:300::/56
-2600:1f01:4900:400::/56
 2600:1f01:4900:500::/56
 2600:1f01:4900:600::/56
 2600:1f01:4900:700::/56
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index 928b5086..5ead27bb 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -1097,7 +1097,8 @@
 2600:1f01:4890::/47
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/55
-2600:1f01:4900:400::/54
+2600:1f01:4900:500::/56
+2600:1f01:4900:600::/55
 2600:1f01:4900:800::/54
 2600:1f01:4902:100::/56
 2600:1f01:4902::/63