diff --git a/_data/chains/eip155-1311.json b/_data/chains/eip155-1311.json
index 550cc15b..eaf1aa12 100644
--- a/_data/chains/eip155-1311.json
+++ b/_data/chains/eip155-1311.json
@@ -9,7 +9,7 @@
     "decimals": 18
   },
   "infoURL": "http://doschain.io/",
-  "shortName": "DOS",
+  "shortName": "TDOS",
   "chainId": 1311,
   "networkId": 1311,
   "explorers": [
diff --git a/_data/chains/eip155-3939.json b/_data/chains/eip155-3939.json
new file mode 100644
index 00000000..088021d5
--- /dev/null
+++ b/_data/chains/eip155-3939.json
@@ -0,0 +1,22 @@
+{
+  "name": "DOS Tesnet",
+  "chain": "DOS",
+  "rpc": ["https://test.doschain.com"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "DOS",
+    "symbol": "DOS",
+    "decimals": 18
+  },
+  "infoURL": "http://doschain.io/",
+  "shortName": "dost",
+  "chainId": 3939,
+  "networkId": 3939,
+  "explorers": [
+    {
+      "name": "DOScan-Test",
+      "url": "https://test.doscan.io",
+      "standard": "EIP3091"
+    }
+  ]
+}
diff --git a/_data/chains/eip155-7979.json b/_data/chains/eip155-7979.json
new file mode 100644
index 00000000..94cf17fb
--- /dev/null
+++ b/_data/chains/eip155-7979.json
@@ -0,0 +1,22 @@
+{
+  "name": "DOS Chain",
+  "chain": "DOS",
+  "rpc": ["https://main.doschain.com"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "DOS",
+    "symbol": "DOS",
+    "decimals": 18
+  },
+  "infoURL": "https://doschain.io",
+  "shortName": "dos",
+  "chainId": 7979,
+  "networkId": 7979,
+  "explorers": [
+    {
+      "name": "DOScan",
+      "url": "https://doscan.io",
+      "standard": "EIP3091"
+    }
+  ]
+}