diff --git a/ethers-core/src/types/chain.rs b/ethers-core/src/types/chain.rs
index ad9e0806..103eacc0 100644
--- a/ethers-core/src/types/chain.rs
+++ b/ethers-core/src/types/chain.rs
@@ -33,7 +33,8 @@ pub enum Chain {
     Avalanche = 43114,
     AvalancheFuji = 43113,
     Sepolia = 11155111,
-    Moonbeam = 1287,
+    Moonbeam = 1284,
+    Moonbase = 1287,
     MoonbeamDev = 1281,
     Moonriver = 1285,
     Optimism = 10,
@@ -69,6 +70,7 @@ impl fmt::Display for Chain {
             Chain::AvalancheFuji => "avalanche-fuji",
             Chain::Sepolia => "sepolia",
             Chain::Moonbeam => "moonbeam",
+            Chain::Moonbase => "moonbase",
             Chain::MoonbeamDev => "moonbeam-dev",
             Chain::Moonriver => "moonriver",
             Chain::Optimism => "optimism",
diff --git a/ethers-etherscan/src/lib.rs b/ethers-etherscan/src/lib.rs
index cc800719..c6005c64 100644
--- a/ethers-etherscan/src/lib.rs
+++ b/ethers-etherscan/src/lib.rs
@@ -102,7 +102,7 @@ impl Client {
             Chain::Oasis |
             Chain::Emerald |
             Chain::EmeraldTestnet => String::default(),
-            Chain::Moonbeam | Chain::MoonbeamDev | Chain::Moonriver => {
+            Chain::Moonbeam | Chain::Moonbase | Chain::MoonbeamDev | Chain::Moonriver => {
                 std::env::var("MOONSCAN_API_KEY")?
             }
             Chain::AnvilHardhat | Chain::Dev => {
@@ -270,6 +270,9 @@ impl ClientBuilder {
             Chain::Moonbeam => {
                 urls("https://api-moonbeam.moonscan.io/api", "https://moonbeam.moonscan.io/")
             }
+            Chain::Moonbase => {
+                urls("https://api-moonbase.moonscan.io/api", "https://moonbase.moonscan.io/")
+            }
             Chain::Moonriver => {
                 urls("https://api-moonriver.moonscan.io/api", "https://moonriver.moonscan.io")
             }