diff --git a/src/App.jsx b/src/App.jsx
index d33a299..14f4e01 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -1,6 +1,6 @@
 import { useMemo, useState } from 'react'
 import MapView from './MapView.jsx'
-import { searchMap } from './api.js'
+import { associatedPhoneLabel, searchMap } from './api.js'
 
 const EMPTY_COLLECTION = { features: [], providers: {}, metadata: {} }
 
@@ -23,7 +23,7 @@ function ResultCard({ item, onArchive }) {
         {details.distance_miles != null && <Badge>{details.distance_miles} mi</Badge>}
       </div>
       {details.associated_phones?.length > 0 && (
-        <p className="metadata">Associated phones: {details.associated_phones.map((phone) => phone.phone || phone).join(', ')}</p>
+        <p className="metadata">Associated phones: {details.associated_phones.map(associatedPhoneLabel).join(', ')}</p>
       )}
       <details>
         <summary>Provenance</summary>
diff --git a/src/MapView.jsx b/src/MapView.jsx
index 7bf1825..f1b0a65 100644
--- a/src/MapView.jsx
+++ b/src/MapView.jsx
@@ -1,6 +1,7 @@
 import { useEffect } from 'react'
 import L from 'leaflet'
 import { MapContainer, Marker, Popup, TileLayer, useMap } from 'react-leaflet'
+import { associatedPhoneLabel } from './api.js'
 
 const markerIcon = L.divIcon({ className: 'evidence-marker', html: '<span></span>', iconSize: [22, 22], iconAnchor: [11, 11] })
 const originIcon = L.divIcon({ className: 'origin-marker', html: '<span></span>', iconSize: [28, 28], iconAnchor: [14, 14] })
@@ -31,7 +32,7 @@ function MarkerDetails({ item }) {
         {details.distance_miles != null && <><dt>Distance</dt><dd>{details.distance_miles} mi</dd></>}
       </dl>
       {details.associated_phones?.length > 0 && (
-        <p>Associated phone records: {details.associated_phones.map((phone) => phone.phone || phone).join(', ')}</p>
+        <p>Associated phone records: {details.associated_phones.map(associatedPhoneLabel).join(', ')}</p>
       )}
       {details.url && <a href={details.url} target="_blank" rel="noreferrer">Open source</a>}
     </div>
diff --git a/src/api.js b/src/api.js
index 47aa093..debd6d2 100644
--- a/src/api.js
+++ b/src/api.js
@@ -1,5 +1,10 @@
 export const API_BASE = (import.meta.env.VITE_API_BASE_URL || 'http://localhost:8000').replace(/\/$/, '')
 
+export function associatedPhoneLabel(phone) {
+  if (typeof phone === 'string') return phone
+  return phone?.phone_number || phone?.phone || 'Phone record'
+}
+
 export function buildSearchUrl({ place, radiusMiles, query, sources, limit = 100 }, apiBase = API_BASE) {
   const params = new URLSearchParams({
     place: place.trim(),
diff --git a/src/api.test.js b/src/api.test.js
index 7772ca0..8362dd3 100644
--- a/src/api.test.js
+++ b/src/api.test.js
@@ -1,5 +1,5 @@
 import { describe, expect, it, vi } from 'vitest'
-import { buildSearchUrl, searchMap } from './api.js'
+import { associatedPhoneLabel, buildSearchUrl, searchMap } from './api.js'
 
 describe('map API', () => {
   it('builds a canonical search URL', () => {
@@ -14,4 +14,9 @@ describe('map API', () => {
     const fetcher = vi.fn().mockResolvedValue({ ok: false, status: 404, json: async () => ({ detail: 'place not found' }) })
     await expect(searchMap({ place: 'Missing', radiusMiles: 10, query: '', sources: ['datasets'] }, fetcher)).rejects.toThrow('place not found')
   })
+
+  it('formats associated phone metadata', () => {
+    expect(associatedPhoneLabel({ phone_number: '+12025550111' })).toBe('+12025550111')
+    expect(associatedPhoneLabel('+12025550112')).toBe('+12025550112')
+  })
 })