diff --git a/src/components/ErrorBanner.tsx b/src/components/ErrorBanner.tsx
new file mode 100644
index 0000000..e4588ad
--- /dev/null
+++ b/src/components/ErrorBanner.tsx
@@ -0,0 +1,49 @@
+import { Pressable, StyleSheet, Text, View } from "react-native";
+import { colors, spacing } from "../theme";
+
+interface ErrorBannerProps {
+  message: string;
+  onRetry: () => void;
+}
+
+export function ErrorBanner({ message, onRetry }: ErrorBannerProps) {
+  return (
+    <View style={styles.container}>
+      <Text style={styles.message}>{message}</Text>
+      <Pressable onPress={onRetry} style={styles.retryButton}>
+        <Text style={styles.retryText}>Retry</Text>
+      </Pressable>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    borderRadius: 12,
+    borderWidth: 1,
+    borderColor: "#fecaca",
+    backgroundColor: "#fef2f2",
+    padding: spacing.md,
+    gap: spacing.sm,
+  },
+  message: {
+    color: colors.danger,
+    fontSize: 14,
+  },
+  retryButton: {
+    alignSelf: "flex-start",
+    borderRadius: 8,
+    backgroundColor: colors.danger,
+    paddingHorizontal: 12,
+    paddingVertical: 8,
+    minHeight: 44,
+    minWidth: 44,
+    justifyContent: "center",
+    alignItems: "center",
+  },
+  retryText: {
+    color: "#ffffff",
+    fontWeight: "600",
+    fontSize: 13,
+  },
+});
diff --git a/src/components/RegisterModal.tsx b/src/components/RegisterModal.tsx
index b1c1d88..406da01 100644
--- a/src/components/RegisterModal.tsx
+++ b/src/components/RegisterModal.tsx
@@ -1,7 +1,6 @@
 import { useState } from "react";
 import {
   ActivityIndicator,
-  Linking,
   Modal,
   Pressable,
   ScrollView,
@@ -13,6 +12,7 @@ import {
 import { prepareRegister, submitRegister } from "../api/resources";
 import type { Resource } from "../types";
 import { colors, shared, typography } from "../theme";
+import { openExternalUrl, stellarExpertTxUrl } from "../utils/stellarExpert";
 
 interface RegisterModalProps {
   visible: boolean;
@@ -86,11 +86,8 @@ export function RegisterModal({
 
   function handleOpenExplorer() {
     if (!txHash) return;
-    // Stellar testnet explorer - update for mainnet if needed
-    const explorerUrl = `https://stellar.expert/explorer/testnet/tx/${txHash}`;
-    Linking.openURL(explorerUrl).catch(() => {
-      onError("Failed to open explorer");
-    });
+    const explorerUrl = stellarExpertTxUrl({ txHash });
+    openExternalUrl(explorerUrl).catch(() => onError("Failed to open explorer"));
   }
 
   function handleClose() {
@@ -148,9 +145,11 @@ export function RegisterModal({
               <Text style={[typography.body, styles.successText]}>✓ Registration successful!</Text>
               <View style={styles.txHashContainer}>
                 <Text style={typography.caption}>Transaction Hash:</Text>
-                <Text style={[typography.caption, styles.txHash]} numberOfLines={1}>
-                  {txHash}
-                </Text>
+                <Pressable onPress={handleOpenExplorer}>
+                  <Text style={[typography.caption, styles.txHash]} numberOfLines={1}>
+                    {txHash}
+                  </Text>
+                </Pressable>
               </View>
             </View>
             <View style={styles.actions}>
diff --git a/src/components/TransferOwnershipModal.tsx b/src/components/TransferOwnershipModal.tsx
index aef0dfe..958de82 100644
--- a/src/components/TransferOwnershipModal.tsx
+++ b/src/components/TransferOwnershipModal.tsx
@@ -10,6 +10,7 @@ import {
 import { colors, shared, spacing, typography } from "../theme";
 import { useTransferOwnership } from "../hooks/useTransferOwnership";
 import type { Resource } from "../types";
+import { openExternalUrl, stellarExpertTxUrl } from "../utils/stellarExpert";
 
 interface TransferOwnershipModalProps {
   resource: Resource;
@@ -47,6 +48,14 @@ export function TransferOwnershipModal({
   const isProcessing = ["preparing", "signing", "submitting"].includes(step);
   const isDone = step === "done";
 
+  function handleOpenExplorer() {
+    if (!txHash) return;
+    const url = stellarExpertTxUrl({ txHash });
+    openExternalUrl(url).catch(() => {
+      // no-op; this modal doesn't have an error callback and should remain usable
+    });
+  }
+
   function handleClose() {
     reset();
     onClose();
@@ -133,9 +142,11 @@ export function TransferOwnershipModal({
             <View style={styles.successContainer}>
               <Text style={styles.successText}>✓ {STEP_LABELS.done}</Text>
               {txHash ? (
-                <Text style={styles.txHash} numberOfLines={1} ellipsizeMode="middle">
-                  Tx: {txHash}
-                </Text>
+                <Pressable onPress={handleOpenExplorer}>
+                  <Text style={styles.txHash} numberOfLines={1} ellipsizeMode="middle">
+                    Tx: {txHash}
+                  </Text>
+                </Pressable>
               ) : null}
               <Pressable
                 onPress={handleSuccess}
diff --git a/src/screens/CatalogScreen.tsx b/src/screens/CatalogScreen.tsx
index 74c5534..c972fad 100644
--- a/src/screens/CatalogScreen.tsx
+++ b/src/screens/CatalogScreen.tsx
@@ -13,6 +13,7 @@ import { StatusBar } from "expo-status-bar";
 import type { NativeStackNavigationProp } from "@react-navigation/native-stack";
 
 import { fetchCatalog, fetchRegistryStatus, getApiBaseUrl } from "../api/resources";
+import { ErrorBanner } from "../components/ErrorBanner";
 import { ResourceCard } from "../components/ResourceCard";
 import { SkeletonCard } from "../components/SkeletonCard";
 import type { RootStackParamList } from "../navigation";
@@ -128,12 +129,7 @@ export function CatalogScreen({ navigation }: CatalogScreenProps) {
             <Text style={styles.apiHint}>API: {getApiBaseUrl()}</Text>
 
             {error ? (
-              <View style={styles.errorBanner}>
-                <Text style={styles.errorText}>{error}</Text>
-                <Pressable onPress={() => void loadData()} style={styles.retryButton}>
-                  <Text style={styles.retryText}>Retry</Text>
-                </Pressable>
-              </View>
+              <ErrorBanner message={error} onRetry={() => void loadData()} />
             ) : null}
 
             {loading ? (
@@ -198,30 +194,6 @@ const styles = StyleSheet.create({
     fontSize: 11,
     color: colors.textSubtle,
   },
-  errorBanner: {
-    borderRadius: 12,
-    borderWidth: 1,
-    borderColor: "#fecaca",
-    backgroundColor: "#fef2f2",
-    padding: spacing.md,
-    gap: spacing.sm,
-  },
-  errorText: {
-    color: colors.danger,
-    fontSize: 14,
-  },
-  retryButton: {
-    alignSelf: "flex-start",
-    borderRadius: 8,
-    backgroundColor: colors.danger,
-    paddingHorizontal: 12,
-    paddingVertical: 8,
-  },
-  retryText: {
-    color: "#ffffff",
-    fontWeight: "600",
-    fontSize: 13,
-  },
   skeletons: {
     gap: 12,
   },
diff --git a/src/screens/ResourceDetailScreen.tsx b/src/screens/ResourceDetailScreen.tsx
index b38fe92..b23c58a 100644
--- a/src/screens/ResourceDetailScreen.tsx
+++ b/src/screens/ResourceDetailScreen.tsx
@@ -15,6 +15,7 @@ import { fetchResource } from "../api/resources";
 import type { RootStackParamList } from "../navigation";
 import type { Resource } from "../types";
 import { colors, shared, spacing, typography } from "../theme";
+import { openExternalUrl, stellarExpertAccountUrl, stellarExpertTxUrl } from "../utils/stellarExpert";
 
 type Props = NativeStackScreenProps<RootStackParamList, "ResourceDetail">;
 
@@ -90,6 +91,18 @@ export function ResourceDetailScreen({ route, navigation }: Props) {
     }
   }
 
+  function handleOpenOwner() {
+    if (!resource) return;
+    const url = stellarExpertAccountUrl({ accountId: resource.walletAddress });
+    openExternalUrl(url).catch(() => setToast("Unable to open explorer"));
+  }
+
+  function handleOpenTx() {
+    if (!resource?.onchainTxHash) return;
+    const url = stellarExpertTxUrl({ txHash: resource.onchainTxHash });
+    openExternalUrl(url).catch(() => setToast("Unable to open explorer"));
+  }
+
   if (loading) {
     return (
       <SafeAreaView style={shared.screen} edges={["bottom"]}>
@@ -152,11 +165,28 @@ export function ResourceDetailScreen({ route, navigation }: Props) {
 
         <View style={styles.infoRow}>
           <Text style={styles.label}>Owner</Text>
-          <Text style={typography.body}>
-            {shortenAddress(resource.walletAddress)}
-          </Text>
+          <Pressable onPress={handleOpenOwner}>
+            <Text style={[typography.body, styles.linkText]}>
+              {shortenAddress(resource.walletAddress)}
+            </Text>
+          </Pressable>
         </View>
 
+        {resource.onchainTxHash ? (
+          <View style={styles.infoRow}>
+            <Text style={styles.label}>Tx</Text>
+            <Pressable onPress={handleOpenTx}>
+              <Text
+                style={[typography.body, styles.linkText, styles.mono]}
+                numberOfLines={1}
+                ellipsizeMode="middle"
+              >
+                {resource.onchainTxHash}
+              </Text>
+            </Pressable>
+          </View>
+        ) : null}
+
         <View style={styles.infoRow}>
           <Text style={styles.label}>Type</Text>
           <Text style={typography.body}>{resource.resourceType}</Text>
@@ -239,6 +269,14 @@ const styles = StyleSheet.create({
     color: colors.textSubtle,
     lineHeight: 18,
   },
+  linkText: {
+    color: colors.primary,
+  },
+  mono: {
+    fontFamily: "monospace",
+    fontSize: 12,
+    maxWidth: 220,
+  },
   toast: {
     position: "absolute",
     bottom: spacing.xl,
diff --git a/src/utils/stellarExpert.ts b/src/utils/stellarExpert.ts
new file mode 100644
index 0000000..f0faab0
--- /dev/null
+++ b/src/utils/stellarExpert.ts
@@ -0,0 +1,62 @@
+import Constants from "expo-constants";
+import { Linking } from "react-native";
+
+type StellarExpertNetworkSegment = "testnet" | "public";
+
+const DEFAULT_NETWORK_PASSPHRASE =
+  (Constants.expoConfig?.extra?.networkPassphrase as string | undefined) ??
+  "Test SDF Network ; September 2015";
+
+function normalizeNetwork(input?: string): string | null {
+  const value = input?.trim().toLowerCase();
+  return value && value.length > 0 ? value : null;
+}
+
+function networkSegmentFromNetworkName(network?: string): StellarExpertNetworkSegment | null {
+  const n = normalizeNetwork(network);
+  if (!n) return null;
+
+  if (n.includes("test")) return "testnet";
+  if (n.includes("public") || n.includes("mainnet") || n.includes("main")) return "public";
+
+  return null;
+}
+
+function networkSegmentFromPassphrase(passphrase?: string): StellarExpertNetworkSegment {
+  const p = normalizeNetwork(passphrase) ?? normalizeNetwork(DEFAULT_NETWORK_PASSPHRASE) ?? "";
+
+  if (p.includes("test sdf network")) return "testnet";
+  if (p.includes("public global stellar network")) return "public";
+
+  // Default to testnet to match current app defaults.
+  return "testnet";
+}
+
+export function stellarExpertTxUrl(opts: {
+  txHash: string;
+  network?: string;
+  networkPassphrase?: string;
+}): string {
+  const segment =
+    networkSegmentFromNetworkName(opts.network) ??
+    networkSegmentFromPassphrase(opts.networkPassphrase);
+  return `https://stellar.expert/explorer/${segment}/tx/${encodeURIComponent(opts.txHash)}`;
+}
+
+export function stellarExpertAccountUrl(opts: {
+  accountId: string;
+  network?: string;
+  networkPassphrase?: string;
+}): string {
+  const segment =
+    networkSegmentFromNetworkName(opts.network) ??
+    networkSegmentFromPassphrase(opts.networkPassphrase);
+  return `https://stellar.expert/explorer/${segment}/account/${encodeURIComponent(opts.accountId)}`;
+}
+
+export async function openExternalUrl(url: string): Promise<void> {
+  const canOpen = await Linking.canOpenURL(url);
+  if (!canOpen) throw new Error("Cannot open URL");
+  await Linking.openURL(url);
+}
+