diff --git a/model/src/main/java/de/cotto/lndmanagej/model/ChannelId.java b/model/src/main/java/de/cotto/lndmanagej/model/ChannelId.java
index 85c83b44..c94d0862 100644
--- a/model/src/main/java/de/cotto/lndmanagej/model/ChannelId.java
+++ b/model/src/main/java/de/cotto/lndmanagej/model/ChannelId.java
@@ -45,6 +45,10 @@ public final class ChannelId implements Comparable<ChannelId> {
         return shortChannelId;
     }
 
+    public int getBlockHeight() {
+        return (int) (shortChannelId >> 40);
+    }
+
     @Override
     public boolean equals(Object other) {
         if (this == other) {
@@ -73,7 +77,7 @@ public final class ChannelId implements Comparable<ChannelId> {
     }
 
     private String getCompactFormWithDelimiter(String delimiter) {
-        long block = shortChannelId >> 40;
+        long block = getBlockHeight();
         long transaction = shortChannelId >> 16 & 0xFFFFFF;
         long output = shortChannelId & 0xFFFF;
         return block + delimiter + transaction + delimiter + output;
diff --git a/model/src/test/java/de/cotto/lndmanagej/model/ChannelIdTest.java b/model/src/test/java/de/cotto/lndmanagej/model/ChannelIdTest.java
index 593f5219..e4aad63c 100644
--- a/model/src/test/java/de/cotto/lndmanagej/model/ChannelIdTest.java
+++ b/model/src/test/java/de/cotto/lndmanagej/model/ChannelIdTest.java
@@ -137,6 +137,11 @@ class ChannelIdTest {
         assertThat(CHANNEL_ID.getCompactFormLnd()).isEqualTo("712345:123:1");
     }
 
+    @Test
+    void getBlocKHeight() {
+        assertThat(CHANNEL_ID.getBlockHeight()).isEqualTo(712_345);
+    }
+
     @Test
     void testEquals() {
         EqualsVerifier.forClass(ChannelId.class).verify();
diff --git a/web/src/integrationTest/java/de/cotto/lndmanagej/controller/ChannelDetailsControllerIT.java b/web/src/integrationTest/java/de/cotto/lndmanagej/controller/ChannelDetailsControllerIT.java
index 76f6d923..ff5a09b4 100644
--- a/web/src/integrationTest/java/de/cotto/lndmanagej/controller/ChannelDetailsControllerIT.java
+++ b/web/src/integrationTest/java/de/cotto/lndmanagej/controller/ChannelDetailsControllerIT.java
@@ -71,6 +71,7 @@ class ChannelDetailsControllerIT {
                 .andExpect(jsonPath("$.remotePubkey", is(PUBKEY_2.toString())))
                 .andExpect(jsonPath("$.remoteAlias", is(ALIAS_2)))
                 .andExpect(jsonPath("$.capacity", is(String.valueOf(CAPACITY.satoshis()))))
+                .andExpect(jsonPath("$.openHeight", is(CHANNEL_ID.getBlockHeight())))
                 .andExpect(jsonPath("$.private", is(true)))
                 .andExpect(jsonPath("$.onChainCosts.openCosts", is("1000")))
                 .andExpect(jsonPath("$.onChainCosts.closeCosts", is("2000")))
diff --git a/web/src/main/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDto.java b/web/src/main/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDto.java
index ecd2f1e5..6ac1eddd 100644
--- a/web/src/main/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDto.java
+++ b/web/src/main/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDto.java
@@ -11,6 +11,7 @@ public record ChannelDetailsDto(
         String channelIdCompact,
         String channelIdCompactLnd,
         ChannelPoint channelPoint,
+        int openHeight,
         Pubkey remotePubkey,
         String remoteAlias,
         String capacity,
@@ -29,6 +30,7 @@ public record ChannelDetailsDto(
                 localChannel.getId().getCompactForm(),
                 localChannel.getId().getCompactFormLnd(),
                 localChannel.getChannelPoint(),
+                localChannel.getId().getBlockHeight(),
                 localChannel.getRemotePubkey(),
                 remoteAlias,
                 String.valueOf(localChannel.getCapacity().satoshis()),
diff --git a/web/src/test/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDtoTest.java b/web/src/test/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDtoTest.java
new file mode 100644
index 00000000..1d63fe53
--- /dev/null
+++ b/web/src/test/java/de/cotto/lndmanagej/controller/dto/ChannelDetailsDtoTest.java
@@ -0,0 +1,83 @@
+package de.cotto.lndmanagej.controller.dto;
+
+import de.cotto.lndmanagej.model.Coins;
+import org.junit.jupiter.api.Test;
+
+import static de.cotto.lndmanagej.model.BalanceInformationFixtures.BALANCE_INFORMATION;
+import static de.cotto.lndmanagej.model.ChannelFixtures.CAPACITY;
+import static de.cotto.lndmanagej.model.ChannelIdFixtures.CHANNEL_ID;
+import static de.cotto.lndmanagej.model.ChannelPointFixtures.CHANNEL_POINT;
+import static de.cotto.lndmanagej.model.CoopClosedChannelFixtures.CLOSED_CHANNEL;
+import static de.cotto.lndmanagej.model.LocalOpenChannelFixtures.LOCAL_OPEN_CHANNEL_PRIVATE;
+import static de.cotto.lndmanagej.model.NodeFixtures.ALIAS;
+import static de.cotto.lndmanagej.model.PubkeyFixtures.PUBKEY_2;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ChannelDetailsDtoTest {
+
+    private static final OnChainCostsDto ON_CHAIN_COSTS = new OnChainCostsDto(Coins.ofSatoshis(1), Coins.ofSatoshis(2));
+    private static final ChannelDetailsDto CHANNEL_DETAILS_DTO =
+            new ChannelDetailsDto(CLOSED_CHANNEL, ALIAS, BALANCE_INFORMATION, ON_CHAIN_COSTS);
+
+    @Test
+    void channelIdShort() {
+        assertThat(CHANNEL_DETAILS_DTO.channelIdShort()).isEqualTo(String.valueOf(CHANNEL_ID.getShortChannelId()));
+    }
+
+    @Test
+    void channelIdCompact() {
+        assertThat(CHANNEL_DETAILS_DTO.channelIdCompact()).isEqualTo(CHANNEL_ID.getCompactForm());
+    }
+
+    @Test
+    void channelIdCompactLnd() {
+        assertThat(CHANNEL_DETAILS_DTO.channelIdCompactLnd()).isEqualTo(CHANNEL_ID.getCompactFormLnd());
+    }
+
+    @Test
+    void channelPoint() {
+        assertThat(CHANNEL_DETAILS_DTO.channelPoint()).isEqualTo(CHANNEL_POINT);
+    }
+
+    @Test
+    void openHeight() {
+        assertThat(CHANNEL_DETAILS_DTO.openHeight()).isEqualTo(CHANNEL_ID.getBlockHeight());
+    }
+
+    @Test
+    void remotePubkey() {
+        assertThat(CHANNEL_DETAILS_DTO.remotePubkey()).isEqualTo(PUBKEY_2);
+    }
+
+    @Test
+    void remoteAlias() {
+        assertThat(CHANNEL_DETAILS_DTO.remoteAlias()).isEqualTo(ALIAS);
+    }
+
+    @Test
+    void capacity() {
+        assertThat(CHANNEL_DETAILS_DTO.capacity()).isEqualTo(String.valueOf(CAPACITY.satoshis()));
+    }
+
+    @Test
+    void privateChannel_false() {
+        assertThat(CHANNEL_DETAILS_DTO.privateChannel()).isFalse();
+    }
+
+    @Test
+    void privateChannel_true() {
+        ChannelDetailsDto dto =
+                new ChannelDetailsDto(LOCAL_OPEN_CHANNEL_PRIVATE, ALIAS, BALANCE_INFORMATION, ON_CHAIN_COSTS);
+        assertThat(dto.privateChannel()).isTrue();
+    }
+
+    @Test
+    void balance() {
+        assertThat(CHANNEL_DETAILS_DTO.balance()).isEqualTo(BalanceInformationDto.createFrom(BALANCE_INFORMATION));
+    }
+
+    @Test
+    void onChainCosts() {
+        assertThat(CHANNEL_DETAILS_DTO.onChainCosts()).isEqualTo(ON_CHAIN_COSTS);
+    }
+}
\ No newline at end of file