diff --git a/asn/AS134098 b/asn/AS134098
index 06241cd..0cca0ee 100644
--- a/asn/AS134098
+++ b/asn/AS134098
@@ -1,5 +1,5 @@
 NAME="Licson Internal Network"
 OWNER="licson"
 DESC=""
-EXTERNAL="INET"
+SOURCE="INET"
 VALID="YES"
diff --git a/asn/AS4201270000 b/asn/AS4201270000
index 5b24d18..c3f437f 100644
--- a/asn/AS4201270000
+++ b/asn/AS4201270000
@@ -1,4 +1,4 @@
 NAME="NeoNetwork Origin"
 OWNER="Neo_Chen"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270001 b/asn/AS4201270001
index c0d302f..8ff9d3f 100644
--- a/asn/AS4201270001
+++ b/asn/AS4201270001
@@ -1,4 +1,4 @@
 NAME="Septs Inter-NeoNetwork Exchange"
 OWNER="Septs"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270002 b/asn/AS4201270002
index 512c708..e18d2dd 100644
--- a/asn/AS4201270002
+++ b/asn/AS4201270002
@@ -1,4 +1,4 @@
 NAME="Septs Home"
 OWNER="Septs"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270003 b/asn/AS4201270003
index 8d4cae6..056da0c 100644
--- a/asn/AS4201270003
+++ b/asn/AS4201270003
@@ -1,4 +1,4 @@
 NAME="chenx97"
 OWNER="chenx97"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270004 b/asn/AS4201270004
index ce2ea40..1e9ce4b 100644
--- a/asn/AS4201270004
+++ b/asn/AS4201270004
@@ -1,4 +1,4 @@
 NAME="frank"
 OWNER="frank"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270005 b/asn/AS4201270005
index baecd0a..d00d7a7 100644
--- a/asn/AS4201270005
+++ b/asn/AS4201270005
@@ -1,4 +1,4 @@
 NAME="Icecat"
 OWNER="Icecat"
 DESC="NextMoe Group Access Network"
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270006 b/asn/AS4201270006
index 2256800..22a0342 100644
--- a/asn/AS4201270006
+++ b/asn/AS4201270006
@@ -1,4 +1,4 @@
 NAME="Jerry Network"
 OWNER="JerryXiao"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270007 b/asn/AS4201270007
index bc16aeb..9b60ab1 100644
--- a/asn/AS4201270007
+++ b/asn/AS4201270007
@@ -1,4 +1,4 @@
 NAME="Staph"
 OWNER="Staph"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270008 b/asn/AS4201270008
index bd81c84..bd31f5f 100644
--- a/asn/AS4201270008
+++ b/asn/AS4201270008
@@ -1,4 +1,4 @@
 NAME="MagicNeko"
 OWNER="Icecat"
 DESC="MagicNeko Network Internet exchange"
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270009 b/asn/AS4201270009
index 8aeb9f4..cbf9180 100644
--- a/asn/AS4201270009
+++ b/asn/AS4201270009
@@ -1,4 +1,4 @@
 NAME="santost12"
 OWNER="santost12"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270010 b/asn/AS4201270010
index 726619a..ea9b4fb 100644
--- a/asn/AS4201270010
+++ b/asn/AS4201270010
@@ -1,4 +1,4 @@
 NAME="Lan Tian"
 OWNER="Lan Tian"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270011 b/asn/AS4201270011
index 366a57b..2494f33 100644
--- a/asn/AS4201270011
+++ b/asn/AS4201270011
@@ -1,4 +1,4 @@
 NAME="LINE-NZ"
 OWNER="LINE-NZ"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270012 b/asn/AS4201270012
index ecec6df..e96e0e4 100644
--- a/asn/AS4201270012
+++ b/asn/AS4201270012
@@ -1,4 +1,4 @@
 NAME="Yhi Interconnect"
 OWNER="Junde Yhi"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270013 b/asn/AS4201270013
index 0def7da..4d39b1d 100644
--- a/asn/AS4201270013
+++ b/asn/AS4201270013
@@ -1,4 +1,4 @@
 NAME="NDOSKRNL"
 OWNER="Ndoskrnl"
 DESC="Ndoskrnl's Network"
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270014 b/asn/AS4201270014
index 810360d..1aebc98 100644
--- a/asn/AS4201270014
+++ b/asn/AS4201270014
@@ -1,4 +1,4 @@
 NAME="leedagee"
 OWNER="leedagee"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4201270015 b/asn/AS4201270015
index ea4f386..ccabbdf 100644
--- a/asn/AS4201270015
+++ b/asn/AS4201270015
@@ -1,4 +1,4 @@
 NAME="James58899"
 OWNER="James58899"
 DESC=""
-EXTERNAL="FALSE"
+SOURCE="NeoNetwork"
diff --git a/asn/AS4242420140 b/asn/AS4242420140
index 2068d52..be5d858 100644
--- a/asn/AS4242420140
+++ b/asn/AS4242420140
@@ -1,4 +1,4 @@
 NAME="Yangfl Network"
 OWNER="Yangfl"
 DESC=""
-EXTERNAL="DN42"
+SOURCE="DN42"
diff --git a/asn/AS4242420916 b/asn/AS4242420916
index c684272..947fe70 100644
--- a/asn/AS4242420916
+++ b/asn/AS4242420916
@@ -1,4 +1,4 @@
 NAME="alanyhq"
 OWNER="alanyhq"
 DESC="alanyhq main"
-EXTERNAL="DN42"
+SOURCE="DN42"
diff --git a/asn/AS4242421037 b/asn/AS4242421037
index 9c09df1..49454e5 100644
--- a/asn/AS4242421037
+++ b/asn/AS4242421037
@@ -1,4 +1,4 @@
 NAME="LibreHouse"
 OWNER="LibreHouse"
 DESC=""
-EXTERNAL="DN42"
+SOURCE="DN42"
diff --git a/asn/AS4242423088 b/asn/AS4242423088
index 42f2b8d..0722e17 100644
--- a/asn/AS4242423088
+++ b/asn/AS4242423088
@@ -1,4 +1,4 @@
 NAME="SUNNET"
 OWNER="SUNNET"
 DESC=""
-EXTERNAL="DN42"
+SOURCE="DN42"
diff --git a/document/asn-dir.txt b/document/asn-dir.txt
index 7ea6728..1cd5252 100644
--- a/document/asn-dir.txt
+++ b/document/asn-dir.txt
@@ -9,10 +9,10 @@ NAME=""
 OWNER=""
 # Description
 DESC=""
-# Whether or not it's a ASN from external source, e.g. DN42 or other VPNs.
-# Any value other than "" or "FALSE" will be seen as "TRUE"
-EXTERNAL=""
+# Source of this ASN
+# Possible values: "NeoNetwork", "DN42" or name of other VPN Networks
+SOURCE=""
 # if it's a ASN registered from *NIC, this variable records
 # whether members of NeoNetwork have validated its ownership yet
-# possible value: "YES" "NO"
+# Possible values: "YES" "NO"
 VALID=""