diff --git a/all/ipv6.txt b/all/ipv6.txt
index ebb3c7d3..548a60b8 100644
--- a/all/ipv6.txt
+++ b/all/ipv6.txt
@@ -264683,6 +264683,7 @@
 2620:108:d000::/44
 2620:120:e000::/40
 2631:0:1::/48
+2631:1:4d40::/48
 2631:1:4ff0::/48
 2631::/48
 2800:3f0:4000::/36
diff --git a/all/ipv6_merged.txt b/all/ipv6_merged.txt
index 6083bde1..c067dd9d 100644
--- a/all/ipv6_merged.txt
+++ b/all/ipv6_merged.txt
@@ -12003,6 +12003,7 @@
 2620:108:7000::/44
 2620:108:d000::/44
 2620:120:e000::/40
+2631:1:4d40::/48
 2631:1:4ff0::/48
 2631::/47
 2800:3f0::/32
diff --git a/amazon/ipv6.txt b/amazon/ipv6.txt
index 5a28de85..564a63b7 100644
--- a/amazon/ipv6.txt
+++ b/amazon/ipv6.txt
@@ -2218,6 +2218,7 @@
 2620:108:d00f::/64
 2620:108:d000::/44
 2631:0:1::/48
+2631:1:4d40::/48
 2631:1:4ff0::/48
 2631::/48
 2804:800:ff00::/48
diff --git a/amazon/ipv6_merged.txt b/amazon/ipv6_merged.txt
index c89e5cd0..9887fdf1 100644
--- a/amazon/ipv6_merged.txt
+++ b/amazon/ipv6_merged.txt
@@ -1609,6 +1609,7 @@
 2620:107:4008::/45
 2620:108:7000::/44
 2620:108:d000::/44
+2631:1:4d40::/48
 2631:1:4ff0::/48
 2631::/47
 2804:800:ff00::/48