diff --git a/document/asn-dir.txt b/document/asn-dir.txt
index 2da5a95..897485f 100644
--- a/document/asn-dir.txt
+++ b/document/asn-dir.txt
@@ -1,6 +1,7 @@
 # as-dir Template
 # ===============
 # Filename format: AS<Number>
+# ASN range: 4201270000 ~ 4201279999
 # Remove any line which starts with '#' when applying
 # AS Name
 NAME=""
diff --git a/document/route-dir.txt b/document/route-dir.txt
index da0fa53..b40a59d 100644
--- a/document/route-dir.txt
+++ b/document/route-dir.txt
@@ -36,7 +36,7 @@ Detailed Information of Each Variable
 	Available options are: Tinc, WireGuard, L2TP, GRE, IPsec/L2TP, IPsec/GRE, OpenVPN, SLIRP, PPP
 
 3. NAME:	Name
-4. ASN:		ASN
+4. ASN:		ASN (without prefix "AS")
 5. UPSTREAM:	Upstream Node Name
 6. DOWNSTREAM:	Downstream Node Name
 7. DESC:	Description