diff --git a/all/ipv6.txt b/all/ipv6.txt
index 4f71a2de..b4ed4169 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -264625,6 +264625,7 @@
 2620:108:d000::/44
 2620:120:e000::/40
 2631:0:1::/48
+2631:1:4ff0::/48
 2631::/48
 2800:3f0:4000::/36
 2800:3f0::/32
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index 36bb8546..18182e9c 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -12002,6 +12002,7 @@
 2620:108:7000::/44
 2620:108:d000::/44
 2620:120:e000::/40
+2631:1:4ff0::/48
 2631::/47
 2800:3f0::/32
 2801:80:1d0::/48
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index bc851587..153d1e98 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -2217,6 +2217,7 @@
 2620:108:d00f::/64
 2620:108:d000::/44
 2631:0:1::/48
+2631:1:4ff0::/48
 2631::/48
 2804:800:ff00::/48
 2804:800::/48
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index c7dad6c7..fbb6ab45 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -1608,6 +1608,7 @@
 2620:107:4008::/45
 2620:108:7000::/44
 2620:108:d000::/44
+2631:1:4ff0::/48
 2631::/47
 2804:800:ff00::/48
 2804:800::/48