diff --git a/ipv4/ao.cidr b/ipv4/ao.cidr
index 82547d433..f90bc3f10 100644
--- a/ipv4/ao.cidr
+++ b/ipv4/ao.cidr
@@ -21,6 +21,7 @@
 102.130.192.0/19
 102.131.40.0/21
 102.165.190.0/24
+102.221.52.0/22
 102.221.108.0/22
 102.221.172.0/22
 102.222.16.0/22
diff --git a/ipv4/zz.cidr b/ipv4/zz.cidr
index 0587fe5a0..15a4278c6 100644
--- a/ipv4/zz.cidr
+++ b/ipv4/zz.cidr
@@ -85,7 +85,7 @@
 102.221.20.0/22
 102.221.24.0/21
 102.221.40.0/22
-102.221.48.0/21
+102.221.48.0/22
 102.221.56.0/22
 102.221.64.0/21
 102.221.72.0/23