diff --git a/ipv6/ec.cidr b/ipv6/ec.cidr
index 371ba963..2cef6038 100644
--- a/ipv6/ec.cidr
+++ b/ipv6/ec.cidr
@@ -76,7 +76,6 @@
 2803:3020::/32
 2803:3090::/32
 2803:3490::/32
-2803:37a0::/32
 2803:3920::/32
 2803:3c00::/32
 2803:3c20::/32