diff --git a/src/main/java/org/arkecosystem/crypto/networks/Devnet.java b/src/main/java/org/arkecosystem/crypto/networks/Devnet.java
index ff89bd8a..d7d60f55 100644
--- a/src/main/java/org/arkecosystem/crypto/networks/Devnet.java
+++ b/src/main/java/org/arkecosystem/crypto/networks/Devnet.java
@@ -2,6 +2,10 @@
 
 public class Devnet implements INetwork {
 
+    public int chainId() {
+        return 11812;
+    }
+
     public int version() {
         return 30;
     }
diff --git a/src/main/java/org/arkecosystem/crypto/networks/INetwork.java b/src/main/java/org/arkecosystem/crypto/networks/INetwork.java
index cfc01482..38736a24 100644
--- a/src/main/java/org/arkecosystem/crypto/networks/INetwork.java
+++ b/src/main/java/org/arkecosystem/crypto/networks/INetwork.java
@@ -2,6 +2,8 @@
 
 public interface INetwork {
 
+    int chainId();
+
     int version();
 
     int wif();
diff --git a/src/main/java/org/arkecosystem/crypto/networks/Mainnet.java b/src/main/java/org/arkecosystem/crypto/networks/Mainnet.java
index 2f3bbb59..7a46e074 100644
--- a/src/main/java/org/arkecosystem/crypto/networks/Mainnet.java
+++ b/src/main/java/org/arkecosystem/crypto/networks/Mainnet.java
@@ -2,6 +2,10 @@
 
 public class Mainnet implements INetwork {
 
+    public int chainId() {
+        return 11811;
+    }
+
     public int version() {
         return 23;
     }
diff --git a/src/main/java/org/arkecosystem/crypto/networks/Testnet.java b/src/main/java/org/arkecosystem/crypto/networks/Testnet.java
index 0066e500..3118588a 100644
--- a/src/main/java/org/arkecosystem/crypto/networks/Testnet.java
+++ b/src/main/java/org/arkecosystem/crypto/networks/Testnet.java
@@ -2,6 +2,10 @@
 
 public class Testnet implements INetwork {
 
+    public int chainId() {
+        return 11812;
+    }
+
     public int version() {
         return 23;
     }
diff --git a/src/test/java/org/arkecosystem/crypto/networks/DevnetTest.java b/src/test/java/org/arkecosystem/crypto/networks/DevnetTest.java
index 81c490d3..aae68739 100644
--- a/src/test/java/org/arkecosystem/crypto/networks/DevnetTest.java
+++ b/src/test/java/org/arkecosystem/crypto/networks/DevnetTest.java
@@ -6,6 +6,11 @@
 
 class DevnetTest {
 
+    @Test
+    void chainId() {
+        assertEquals(11812, new Devnet().chainId());
+    }
+
     @Test
     void version() {
         assertEquals(0x1E, new Devnet().version());
diff --git a/src/test/java/org/arkecosystem/crypto/networks/MainnetTest.java b/src/test/java/org/arkecosystem/crypto/networks/MainnetTest.java
index 5e1f3c9a..7071a9e0 100644
--- a/src/test/java/org/arkecosystem/crypto/networks/MainnetTest.java
+++ b/src/test/java/org/arkecosystem/crypto/networks/MainnetTest.java
@@ -6,6 +6,11 @@
 
 class MainnetTest {
 
+    @Test
+    void chainId() {
+        assertEquals(11811, new Mainnet().chainId());
+    }
+
     @Test
     void version() {
         assertEquals(0x17, new Mainnet().version());
diff --git a/src/test/java/org/arkecosystem/crypto/networks/TestnetTest.java b/src/test/java/org/arkecosystem/crypto/networks/TestnetTest.java
index d31e0139..7e1ac6c9 100644
--- a/src/test/java/org/arkecosystem/crypto/networks/TestnetTest.java
+++ b/src/test/java/org/arkecosystem/crypto/networks/TestnetTest.java
@@ -6,6 +6,11 @@
 
 class TestnetTest {
 
+    @Test
+    void chainId() {
+        assertEquals(11812, new Testnet().chainId());
+    }
+
     @Test
     void version() {
         assertEquals(0x17, new Testnet().version());