diff --git a/all/ipv6.txt b/all/ipv6.txt
index e086f5b3..27d0123a 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -3222,7 +3222,7 @@
 2600:f0f0:4000::/44
 2600:f0f0:40::/48
 2600:f0f0:6000::/44
-2600:f0f0:600::/48
+2600:f0f0:600::/55
 2600:f0f0:6010::/44
 2600:f0f0:80::/48
 2600:f0f0:a0::/48
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index e3a5057d..892fbd78 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -952,7 +952,7 @@
 2600:f0f0:4000::/44
 2600:f0f0:40::/48
 2600:f0f0:6000::/43
-2600:f0f0:600::/48
+2600:f0f0:600::/55
 2600:f0f0:80::/48
 2600:f0f0:a0::/48
 2600:f0f1:8801::/48
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index 13f8b9d2..fd628809 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -970,7 +970,7 @@
 2600:f0f0:4000::/44
 2600:f0f0:40::/48
 2600:f0f0:6000::/44
-2600:f0f0:600::/48
+2600:f0f0:600::/55
 2600:f0f0:6010::/44
 2600:f0f0:80::/48
 2600:f0f0:a0::/48
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index 21a49fde..6435df15 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -776,7 +776,7 @@
 2600:f0f0:4000::/44
 2600:f0f0:40::/48
 2600:f0f0:6000::/43
-2600:f0f0:600::/48
+2600:f0f0:600::/55
 2600:f0f0:80::/48
 2600:f0f0:a0::/48
 2600:f0f1:8801::/48