diff --git a/backtrace/asn.go b/backtrace/asn.go
index 5e63a3e..b598db5 100644
--- a/backtrace/asn.go
+++ b/backtrace/asn.go
@@ -144,7 +144,8 @@ func ipAsn(ip string) string {
 	case strings.HasPrefix(ip, "219.158"):
 		return "AS4837"
 	case strings.HasPrefix(ip, "223.120.19") || strings.HasPrefix(ip, "223.120.17") || strings.HasPrefix(ip, "223.120.16") || 
-		strings.HasPrefix(ip, "223.120.140") || strings.HasPrefix(ip, "223.120.130"):
+		strings.HasPrefix(ip, "223.120.140") || strings.HasPrefix(ip, "223.120.130") || strings.HasPrefix(ip, "223.120.131") || 
+		strings.HasPrefix(ip, "223.120.141"):
 		return "AS58807"
 	case strings.HasPrefix(ip, "223.118") || strings.HasPrefix(ip, "223.119") || strings.HasPrefix(ip, "223.120") || strings.HasPrefix(ip, "223.121"):
 		return "AS58453"