diff --git a/.changeset/swift-pumas-taste.md b/.changeset/swift-pumas-taste.md
new file mode 100644
index 00000000000..eb08662e206
--- /dev/null
+++ b/.changeset/swift-pumas-taste.md
@@ -0,0 +1,5 @@
+---
+"chainlink": patch
+---
+
+#internal add head report chain_id
diff --git a/core/services/headreporter/telemetry_reporter.go b/core/services/headreporter/telemetry_reporter.go
index 93852f44c0d..0d93ca59a41 100644
--- a/core/services/headreporter/telemetry_reporter.go
+++ b/core/services/headreporter/telemetry_reporter.go
@@ -44,6 +44,7 @@ func (t *telemetryReporter) ReportNewHead(ctx context.Context, head *evmtypes.He
 		}
 	}
 	request := &telem.HeadReportRequest{
+		ChainID: head.EVMChainID.String(),
 		Latest: &telem.Block{
 			Timestamp: uint64(head.Timestamp.UTC().Unix()),
 			Number:    uint64(head.Number),
diff --git a/core/services/headreporter/telemetry_reporter_test.go b/core/services/headreporter/telemetry_reporter_test.go
index 58c09354905..85bfea5866a 100644
--- a/core/services/headreporter/telemetry_reporter_test.go
+++ b/core/services/headreporter/telemetry_reporter_test.go
@@ -35,6 +35,7 @@ func Test_TelemetryReporter_NewHead(t *testing.T) {
 		},
 	}
 	requestBytes, err := proto.Marshal(&telem.HeadReportRequest{
+		ChainID: "100",
 		Latest: &telem.Block{
 			Timestamp: uint64(head.Timestamp.UTC().Unix()),
 			Number:    42,
@@ -70,6 +71,7 @@ func Test_TelemetryReporter_NewHeadMissingFinalized(t *testing.T) {
 		IsFinalized: false,
 	}
 	requestBytes, err := proto.Marshal(&telem.HeadReportRequest{
+		ChainID: "100",
 		Latest: &telem.Block{
 			Timestamp: uint64(head.Timestamp.UTC().Unix()),
 			Number:    42,
diff --git a/core/services/synchronization/telem/telem_head_report.pb.go b/core/services/synchronization/telem/telem_head_report.pb.go
index 18e4532472b..12801314a7e 100644
--- a/core/services/synchronization/telem/telem_head_report.pb.go
+++ b/core/services/synchronization/telem/telem_head_report.pb.go
@@ -25,7 +25,7 @@ type HeadReportRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Chain     string `protobuf:"bytes,1,opt,name=chain,proto3" json:"chain,omitempty"`
+	ChainID   string `protobuf:"bytes,1,opt,name=chainID,proto3" json:"chainID,omitempty"`
 	Latest    *Block `protobuf:"bytes,2,opt,name=latest,proto3" json:"latest,omitempty"`
 	Finalized *Block `protobuf:"bytes,3,opt,name=finalized,proto3,oneof" json:"finalized,omitempty"`
 }
@@ -62,9 +62,9 @@ func (*HeadReportRequest) Descriptor() ([]byte, []int) {
 	return file_core_services_synchronization_telem_telem_head_report_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *HeadReportRequest) GetChain() string {
+func (x *HeadReportRequest) GetChainID() string {
 	if x != nil {
-		return x.Chain
+		return x.ChainID
 	}
 	return ""
 }
@@ -153,26 +153,27 @@ var file_core_services_synchronization_telem_telem_head_report_proto_rawDesc = [
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 }
 
 var (