diff --git a/all/ipv6.txt b/all/ipv6.txt
index 36547088..08fc1924 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -236385,6 +236385,7 @@
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/56
 2600:1f01:4900:300::/56
+2600:1f01:4900:400::/56
 2600:1f01:4904::/47
 2600:1f01:4906::/47
 2600:1f01:4908::/47
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index 9fac72a0..970ddda4 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -11077,6 +11077,7 @@
 2600:1f01:4890::/47
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/55
+2600:1f01:4900:400::/56
 2600:1f01:4904::/46
 2600:1f01:4908::/45
 2600:1f01:4910::/45
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index 6ea93d03..e57a972a 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -1103,6 +1103,7 @@
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/56
 2600:1f01:4900:300::/56
+2600:1f01:4900:400::/56
 2600:1f01:4904::/47
 2600:1f01:4906::/47
 2600:1f01:4908::/47
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index 3174bb22..93eb80aa 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -924,6 +924,7 @@
 2600:1f01:4890::/47
 2600:1f01:4900:100::/56
 2600:1f01:4900:200::/55
+2600:1f01:4900:400::/56
 2600:1f01:4904::/46
 2600:1f01:4908::/45
 2600:1f01:4910::/45