diff --git a/ipv4/us.cidr b/ipv4/us.cidr
index fddc4a542..c61c70872 100644
--- a/ipv4/us.cidr
+++ b/ipv4/us.cidr
@@ -13934,7 +13934,12 @@
 199.19.192.0/20
 199.19.208.0/22
 199.19.224.0/19
-199.20.0.0/16
+199.20.0.0/21
+199.20.14.0/24
+199.20.16.0/20
+199.20.32.0/19
+199.20.64.0/18
+199.20.128.0/17
 199.21.0.0/17
 199.21.128.0/20
 199.21.144.0/22