diff --git a/all/ipv4.txt b/all/ipv4.txt
index c8f671e4..430a6967 100644
--- a/all/ipv4.txt
+++ b/all/ipv4.txt
@@ -5671,6 +5671,7 @@
 15.221.153.0/24
 15.221.160.0/22
 15.221.164.0/22
+15.221.176.0/20
 15.222.0.0/15
 15.222.16.8/29
 15.222.16.32/27
diff --git a/all/ipv4_merged.txt b/all/ipv4_merged.txt
index 23e663e6..4826ee38 100644
--- a/all/ipv4_merged.txt
+++ b/all/ipv4_merged.txt
@@ -215,6 +215,7 @@
 15.221.144.0/21
 15.221.152.0/23
 15.221.160.0/21
+15.221.176.0/20
 15.222.0.0/15
 15.228.0.0/15
 15.230.0.4/30
diff --git a/amazon/ipv4.txt b/amazon/ipv4.txt
index 458c116e..365148f7 100644
--- a/amazon/ipv4.txt
+++ b/amazon/ipv4.txt
@@ -1436,6 +1436,7 @@
 15.221.153.0/24
 15.221.160.0/22
 15.221.164.0/22
+15.221.176.0/20
 15.222.0.0/15
 15.222.16.8/29
 15.222.16.32/27
diff --git a/amazon/ipv4_merged.txt b/amazon/ipv4_merged.txt
index 330d2e1a..ffe961c7 100644
--- a/amazon/ipv4_merged.txt
+++ b/amazon/ipv4_merged.txt
@@ -179,6 +179,7 @@
 15.221.144.0/21
 15.221.152.0/23
 15.221.160.0/21
+15.221.176.0/20
 15.222.0.0/15
 15.228.0.0/15
 15.230.0.4/30