Add residential proxy data to Anonymizer record

Adds a residential field to the Anonymizer record, sourced from the
GeoIP Residential Proxy feed. This data is exposed as a new reusable
AnonymizerFeed record (confidence, networkLastSeen, providerName)
so that future anonymizer feeds (e.g. VPN, mobile, datacenter) can
share the same shape. Because the residential proxy feed is a
superset of Anonymous Plus data, the anonymizer object may now
contain only the residential field.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: oschwald

CHANGELOG.md

@@ -1,6 +1,18 @@
 CHANGELOG
 =========
 
+5.2.0 (unreleased)
+------------------
+
+* A new `residential` field has been added to the `Anonymizer` record. This
+  is an `AnonymizerFeed` record containing `confidence`, `networkLastSeen`,
+  and `providerName` fields sourced from the GeoIP Residential Proxy feed.
+  Because the residential proxy feed is a superset of the data used for the
+  other `Anonymizer` fields, `residential` may be populated even when none of
+  the other fields on `Anonymizer` are set. The `AnonymizerFeed` record is
+  intended to be reused for other anonymizer network categories that may be
+  added in the future.
+
 5.1.0 (2026-05-12)
 ------------------
 

src/main/java/com/maxmind/geoip2/record/Anonymizer.java

@@ -31,6 +31,11 @@
  * @param providerName The name of the VPN provider (e.g., NordVPN, SurfShark, etc.) associated
  *                     with the network. This is only available from the GeoIP Insights
  *                     web service.
+ * @param residential Data about the network's presence in the GeoIP Residential Proxy feed.
+ *                    Note that the residential proxy feed is a superset of the data used for
+ *                    the other fields on this record, so this field may be present even when
+ *                    none of the other fields are set. This is only available from the GeoIP
+ *                    Insights web service.
  */
 public record Anonymizer(
     @JsonProperty("confidence")
@@ -58,14 +63,24 @@ public record Anonymizer(
     LocalDate networkLastSeen,
 
     @JsonProperty("provider_name")
-    String providerName
+    String providerName,
+
+    @JsonProperty("residential")
+    AnonymizerFeed residential
 ) implements JsonSerializable {
 
+    /**
+     * Compact canonical constructor that sets a default for a null {@code residential} value.
+     */
+    public Anonymizer {
+        residential = residential != null ? residential : new AnonymizerFeed();
+    }
+
     /**
      * Constructs an {@code Anonymizer} record with {@code null} values for all the nullable
      * fields and {@code false} for all boolean fields.
      */
     public Anonymizer() {
-        this(null, false, false, false, false, false, false, null, null);
+        this(null, false, false, false, false, false, false, null, null, null);
     }
 }

src/main/java/com/maxmind/geoip2/record/AnonymizerFeed.java

@@ -0,0 +1,43 @@
+package com.maxmind.geoip2.record;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.maxmind.geoip2.JsonSerializable;
+import java.time.LocalDate;
+
+/**
+ * <p>
+ * Contains data about a network's presence in a specific anonymizer data feed, such as the
+ * residential proxy feed. Additional feeds, such as VPNs, mobile networks, and hosting or
+ * datacenter providers, may be added to the {@link Anonymizer} record in the future using this
+ * same record type.
+ * </p>
+ * <p>
+ * This record is returned by the GeoIP Insights web service.
+ * </p>
+ *
+ * @param confidence A score ranging from 1 to 99 that is our percent confidence that the
+ *                   network is currently part of an actively used network of this feed's
+ *                   category. This is only available from the GeoIP Insights web service.
+ * @param networkLastSeen The last day that the network was sighted in this feed. This is only
+ *                        available from the GeoIP Insights web service.
+ * @param providerName The name of the provider (e.g., NordVPN, SurfShark, etc.) associated with
+ *                     the network. This is only available from the GeoIP Insights web service.
+ */
+public record AnonymizerFeed(
+    @JsonProperty("confidence")
+    Integer confidence,
+
+    @JsonProperty("network_last_seen")
+    LocalDate networkLastSeen,
+
+    @JsonProperty("provider_name")
+    String providerName
+) implements JsonSerializable {
+
+    /**
+     * Constructs an {@code AnonymizerFeed} record with {@code null} values for all fields.
+     */
+    public AnonymizerFeed() {
+        this(null, null, null);
+    }
+}

src/test/java/com/maxmind/geoip2/model/InsightsResponseTest.java

@@ -16,6 +16,7 @@
 import com.maxmind.geoip2.exception.GeoIp2Exception;
 import com.maxmind.geoip2.model.ConnectionTypeResponse.ConnectionType;
 import com.maxmind.geoip2.record.Anonymizer;
+import com.maxmind.geoip2.record.AnonymizerFeed;
 import com.maxmind.geoip2.record.Location;
 import com.maxmind.geoip2.record.MaxMind;
 import com.maxmind.geoip2.record.Postal;
@@ -206,6 +207,25 @@ public void testAnonymizer() {
             anonymizer.providerName(),
             "anonymizer.providerName() does not return NordVPN"
         );
+
+        AnonymizerFeed residential = anonymizer.residential();
+
+        assertNotNull(residential, "anonymizer.residential() returns null");
+        assertEquals(
+            Integer.valueOf(82),
+            residential.confidence(),
+            "anonymizer.residential().confidence() does not return 82"
+        );
+        assertEquals(
+            LocalDate.parse("2026-05-11"),
+            residential.networkLastSeen(),
+            "anonymizer.residential().networkLastSeen() does not return 2026-05-11"
+        );
+        assertEquals(
+            "quickshift",
+            residential.providerName(),
+            "anonymizer.residential().providerName() does not return quickshift"
+        );
     }
 
     @Test

src/test/java/com/maxmind/geoip2/model/JsonTest.java

@@ -62,6 +62,11 @@ public void testInsightsSerialization() throws IOException {
             .put("is_tor_exit_node", true)
             .put("network_last_seen", "2024-12-31")
             .put("provider_name", "NordVPN")
+            .startObjectField("residential")
+            .put("confidence", 82)
+            .put("network_last_seen", "2026-05-11")
+            .put("provider_name", "quickshift")
+            .end()
             .end()
             .startObjectField("country")
             .startObjectField("names")

src/test/resources/test-data/insights0.json

@@ -94,6 +94,11 @@
     "is_residential_proxy": true,
     "is_tor_exit_node": true,
     "network_last_seen": "2024-12-31",
-    "provider_name": "NordVPN"
+    "provider_name": "NordVPN",
+    "residential": {
+      "confidence": 82,
+      "network_last_seen": "2026-05-11",
+      "provider_name": "quickshift"
+    }
   }
 }

src/test/resources/test-data/insights1.json

@@ -110,6 +110,11 @@
     "is_residential_proxy": true,
     "is_tor_exit_node": true,
     "network_last_seen": "2024-12-31",
-    "provider_name": "NordVPN"
+    "provider_name": "NordVPN",
+    "residential": {
+      "confidence": 82,
+      "network_last_seen": "2026-05-11",
+      "provider_name": "quickshift"
+    }
   }
 }