diff --git a/internal/oohelperd/ipinfo.go b/internal/oohelperd/ipinfo.go
index 23669f0afe..c3fa0edb90 100644
--- a/internal/oohelperd/ipinfo.go
+++ b/internal/oohelperd/ipinfo.go
@@ -74,7 +74,7 @@ type endpointInfo struct {
 // whether an IP address is valid for a domain;
 //
 // 4. otherwise, we don't generate any endpoint to measure.
-func ipInfoToEndpoints(URL *url.URL, ipinfo map[string]*model.THIPInfo) []endpointInfo {
+func ipInfoToEndpoints(logger model.Logger, URL *url.URL, ipinfo map[string]*model.THIPInfo) []endpointInfo {
 	var ports []string
 
 	if port := URL.Port(); port != "" {
@@ -88,6 +88,7 @@ func ipInfoToEndpoints(URL *url.URL, ipinfo map[string]*model.THIPInfo) []endpoi
 	out := []endpointInfo{}
 	for addr, info := range ipinfo {
 		if (info.Flags & model.THIPInfoFlagIsBogon) != 0 {
+			logger.Infof("IPInfo: skip bogon IP address: %s", addr)
 			continue // as documented
 		}
 		for _, port := range ports {
diff --git a/internal/oohelperd/ipinfo_test.go b/internal/oohelperd/ipinfo_test.go
index 99aa4a6dba..eeeeb659f8 100644
--- a/internal/oohelperd/ipinfo_test.go
+++ b/internal/oohelperd/ipinfo_test.go
@@ -4,6 +4,7 @@ import (
 	"net/url"
 	"testing"
 
+	"github.com/apex/log"
 	"github.com/google/go-cmp/cmp"
 	"github.com/ooni/probe-cli/v3/internal/model"
 )
@@ -84,6 +85,32 @@ func Test_newIPInfo(t *testing.T) {
 			addrs: []string{},
 		},
 		want: map[string]*model.THIPInfo{},
+	}, {
+		name: "with localhost",
+		args: args{
+			creq: &model.THRequest{
+				HTTPRequest:        "",
+				HTTPRequestHeaders: map[string][]string{},
+				TCPConnect: []string{
+					"127.0.0.1:443",
+					"[::1]:443",
+				},
+			},
+			addrs: []string{
+				"127.0.0.1",
+				"::1",
+			},
+		},
+		want: map[string]*model.THIPInfo{
+			"127.0.0.1": {
+				ASN:   0,
+				Flags: model.THIPInfoFlagIsBogon | model.THIPInfoFlagResolvedByProbe | model.THIPInfoFlagResolvedByTH,
+			},
+			"::1": {
+				ASN:   0,
+				Flags: model.THIPInfoFlagIsBogon | model.THIPInfoFlagResolvedByProbe | model.THIPInfoFlagResolvedByTH,
+			},
+		},
 	}}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -137,6 +164,10 @@ func Test_ipInfoToEndpoints(t *testing.T) {
 					ASN:   15169,
 					Flags: model.THIPInfoFlagResolvedByTH,
 				},
+				"127.0.0,1": {
+					ASN:   0,
+					Flags: model.THIPInfoFlagIsBogon | model.THIPInfoFlagResolvedByProbe,
+				},
 			},
 		},
 		want: []endpointInfo{{
@@ -239,7 +270,7 @@ func Test_ipInfoToEndpoints(t *testing.T) {
 	}}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got := ipInfoToEndpoints(tt.args.URL, tt.args.ipinfo)
+			got := ipInfoToEndpoints(log.Log, tt.args.URL, tt.args.ipinfo)
 			if diff := cmp.Diff(tt.want, got); diff != "" {
 				t.Fatal(diff)
 			}
diff --git a/internal/oohelperd/measure.go b/internal/oohelperd/measure.go
index 3a0cc21986..1d041f0e12 100644
--- a/internal/oohelperd/measure.go
+++ b/internal/oohelperd/measure.go
@@ -80,7 +80,7 @@ func measure(ctx context.Context, config *Handler, creq *ctrlRequest) (*ctrlResp
 
 	// obtain IP info and figure out the endpoints measurement plan
 	cresp.IPInfo = newIPInfo(creq, cresp.DNS.Addrs)
-	endpoints := ipInfoToEndpoints(URL, cresp.IPInfo)
+	endpoints := ipInfoToEndpoints(logger, URL, cresp.IPInfo)
 
 	// tcpconnect: start over all the endpoints
 	tcpconnch := make(chan *tcpResultPair, len(endpoints))