diff --git a/java/google/registry/beam/spec11/Spec11Pipeline.java b/java/google/registry/beam/spec11/Spec11Pipeline.java
index de58ab8b6..83fdeb63d 100644
--- a/java/google/registry/beam/spec11/Spec11Pipeline.java
+++ b/java/google/registry/beam/spec11/Spec11Pipeline.java
@@ -73,7 +73,7 @@ public class Spec11Pipeline implements Serializable {
   /** The JSON object field into which we put the registrar's e-mail address for Spec11 reports. */
   public static final String REGISTRAR_EMAIL_FIELD = "registrarEmailAddress";
   /** The JSON object field into which we put the registrar's name for Spec11 reports. */
-  public static final String REGISTRAR_NAME_FIELD = "registrarName";
+  public static final String REGISTRAR_CLIENT_ID_FIELD = "registrarClientId";
   /** The JSON object field we put the threat match array for Spec11 reports. */
   public static final String THREAT_MATCHES_FIELD = "threatMatches";
 
@@ -172,31 +172,31 @@ public class Spec11Pipeline implements Serializable {
         domains.apply("Run through SafeBrowsingAPI", ParDo.of(evaluateSafeBrowsingFn));
     subdomains
         .apply(
-            "Map registrar name to email/ThreatMatch pair",
+            "Map registrar client ID to email/ThreatMatch pair",
             MapElements.into(
                     TypeDescriptors.kvs(
                         TypeDescriptors.strings(), TypeDescriptor.of(EmailAndThreatMatch.class)))
                 .via(
                     (KV<Subdomain, ThreatMatch> kv) ->
                         KV.of(
-                            kv.getKey().registrarName(),
+                            kv.getKey().registrarClientId(),
                             EmailAndThreatMatch.create(
                                 kv.getKey().registrarEmailAddress(), kv.getValue()))))
-        .apply("Group by registrar name", GroupByKey.create())
+        .apply("Group by registrar client ID", GroupByKey.create())
         .apply(
             "Convert results to JSON format",
             MapElements.into(TypeDescriptors.strings())
                 .via(
                     (KV<String, Iterable<EmailAndThreatMatch>> kv) -> {
-                      String registrarName = kv.getKey();
+                      String clientId = kv.getKey();
                       checkArgument(
                           kv.getValue().iterator().hasNext(),
                           String.format(
-                              "Registrar named %s had no corresponding threats", registrarName));
+                              "Registrar with ID %s had no corresponding threats", clientId));
                       String email = kv.getValue().iterator().next().email();
                       JSONObject output = new JSONObject();
                       try {
-                        output.put(REGISTRAR_NAME_FIELD, registrarName);
+                        output.put(REGISTRAR_CLIENT_ID_FIELD, clientId);
                         output.put(REGISTRAR_EMAIL_FIELD, email);
                         JSONArray threatMatchArray = new JSONArray();
                         for (EmailAndThreatMatch emailAndThreatMatch : kv.getValue()) {
diff --git a/java/google/registry/beam/spec11/Subdomain.java b/java/google/registry/beam/spec11/Subdomain.java
index faadc7fa5..e01f7bf91 100644
--- a/java/google/registry/beam/spec11/Subdomain.java
+++ b/java/google/registry/beam/spec11/Subdomain.java
@@ -36,12 +36,12 @@ import org.apache.beam.sdk.io.gcp.bigquery.SchemaAndRecord;
 public abstract class Subdomain implements Serializable {
 
   private static final ImmutableList<String> FIELD_NAMES =
-      ImmutableList.of("fullyQualifiedDomainName", "registrarName", "registrarEmailAddress");
+      ImmutableList.of("fullyQualifiedDomainName", "registrarClientId", "registrarEmailAddress");
 
   /** Returns the fully qualified domain name. */
   abstract String fullyQualifiedDomainName();
-  /** Returns the name of the associated registrar for this domain. */
-  abstract String registrarName();
+  /** Returns the client ID of the associated registrar for this domain. */
+  abstract String registrarClientId();
   /** Returns the email address of the registrar associated with this domain. */
   abstract String registrarEmailAddress();
 
@@ -57,7 +57,7 @@ public abstract class Subdomain implements Serializable {
     GenericRecord record = schemaAndRecord.getRecord();
     return create(
         extractField(record, "fullyQualifiedDomainName"),
-        extractField(record, "registrarName"),
+        extractField(record, "registrarClientId"),
         extractField(record, "registrarEmailAddress"));
   }
 
@@ -69,8 +69,9 @@ public abstract class Subdomain implements Serializable {
    */
   @VisibleForTesting
   static Subdomain create(
-      String fullyQualifiedDomainName, String registrarName, String registrarEmailAddress) {
-    return new AutoValue_Subdomain(fullyQualifiedDomainName, registrarName, registrarEmailAddress);
+      String fullyQualifiedDomainName, String registrarClientId, String registrarEmailAddress) {
+    return new AutoValue_Subdomain(
+        fullyQualifiedDomainName, registrarClientId, registrarEmailAddress);
   }
 }
 
diff --git a/java/google/registry/beam/spec11/sql/subdomains.sql b/java/google/registry/beam/spec11/sql/subdomains.sql
index 2df1cf74c..5b7535bd3 100644
--- a/java/google/registry/beam/spec11/sql/subdomains.sql
+++ b/java/google/registry/beam/spec11/sql/subdomains.sql
@@ -20,7 +20,7 @@
 
 SELECT
   domain.fullyQualifiedDomainName AS fullyQualifiedDomainName,
-  registrar.name AS registrarName,
+  registrar.clientId AS registrarClientId,
   COALESCE(registrar.emailAddress, '') AS registrarEmailAddress
 FROM ( (
     SELECT
@@ -37,13 +37,13 @@ FROM ( (
         OR deletionTime > CURRENT_TIMESTAMP)) AS domain
   JOIN (
     SELECT
-      __key__.name AS name,
+      __key__.name AS clientId,
       emailAddress
     FROM
       `%PROJECT_ID%.%DATASTORE_EXPORT_DATASET%.%REGISTRAR_TABLE%`
     WHERE
       type = 'REAL') AS registrar
   ON
-    domain.currentSponsorClientId = registrar.name)
+    domain.currentSponsorClientId = registrar.clientId)
 ORDER BY
   creationTime DESC
diff --git a/javatests/google/registry/beam/spec11/Spec11PipelineTest.java b/javatests/google/registry/beam/spec11/Spec11PipelineTest.java
index 9382e8d2a..b639c59d0 100644
--- a/javatests/google/registry/beam/spec11/Spec11PipelineTest.java
+++ b/javatests/google/registry/beam/spec11/Spec11PipelineTest.java
@@ -151,7 +151,7 @@ public class Spec11PipelineTest {
 
     JSONObject noEmailRegistrarJSON = new JSONObject(sortedLines.get(0));
     assertThat(noEmailRegistrarJSON.get("registrarEmailAddress")).isEqualTo("");
-    assertThat(noEmailRegistrarJSON.get("registrarName")).isEqualTo("noEmailRegistrar");
+    assertThat(noEmailRegistrarJSON.get("registrarClientId")).isEqualTo("noEmailRegistrar");
     assertThat(noEmailRegistrarJSON.has("threatMatches")).isTrue();
     JSONArray noEmailThreatMatch = noEmailRegistrarJSON.getJSONArray("threatMatches");
     assertThat(noEmailThreatMatch.length()).isEqualTo(1);
@@ -162,7 +162,7 @@ public class Spec11PipelineTest {
 
     JSONObject someRegistrarJSON = new JSONObject(sortedLines.get(1));
     assertThat(someRegistrarJSON.get("registrarEmailAddress")).isEqualTo("fake@someRegistrar.com");
-    assertThat(someRegistrarJSON.get("registrarName")).isEqualTo("someRegistrar");
+    assertThat(someRegistrarJSON.get("registrarClientId")).isEqualTo("someRegistrar");
     assertThat(someRegistrarJSON.has("threatMatches")).isTrue();
     JSONArray someThreatMatch = someRegistrarJSON.getJSONArray("threatMatches");
     assertThat(someThreatMatch.length()).isEqualTo(1);
@@ -174,7 +174,7 @@ public class Spec11PipelineTest {
     // theRegistrar has two ThreatMatches, we have to parse it explicitly
     JSONObject theRegistrarJSON = new JSONObject(sortedLines.get(2));
     assertThat(theRegistrarJSON.get("registrarEmailAddress")).isEqualTo("fake@theRegistrar.com");
-    assertThat(theRegistrarJSON.get("registrarName")).isEqualTo("theRegistrar");
+    assertThat(theRegistrarJSON.get("registrarClientId")).isEqualTo("theRegistrar");
     assertThat(theRegistrarJSON.has("threatMatches")).isTrue();
     JSONArray theThreatMatches = theRegistrarJSON.getJSONArray("threatMatches");
     assertThat(theThreatMatches.length()).isEqualTo(2);