diff --git a/radar/bgproute.go b/radar/bgproute.go
index fc5a0a171f2..f88b31855b5 100644
--- a/radar/bgproute.go
+++ b/radar/bgproute.go
@@ -45,7 +45,7 @@ func (r *BGPRouteService) Moas(ctx context.Context, query BGPRouteMoasParams, op
 	return
 }
 
-// Lookup prefix-to-origin mapping on global routing tables.
+// Lookup prefix-to-ASN mapping on global routing tables.
 func (r *BGPRouteService) Pfx2as(ctx context.Context, query BGPRoutePfx2asParams, opts ...option.RequestOption) (res *BGPRoutePfx2asResponse, err error) {
 	opts = append(r.Options[:], opts...)
 	var env BGPRoutePfx2asResponseEnvelope
@@ -529,9 +529,12 @@ func (r bgpRouteMoasResponseEnvelopeJSON) RawJSON() string {
 type BGPRoutePfx2asParams struct {
 	// Format results are returned in.
 	Format param.Field[BGPRoutePfx2asParamsFormat] `query:"format"`
+	// Return only results with the longest prefix match for the given prefix. For
+	// example, specify a /32 prefix to lookup the origin ASN for an IPv4 address.
+	LongestPrefixMatch param.Field[bool] `query:"longestPrefixMatch"`
 	// Lookup prefixes originated by the given ASN
 	Origin param.Field[int64] `query:"origin"`
-	// Lookup origins of the given prefix
+	// Lookup origin ASNs of the given prefix
 	Prefix param.Field[string] `query:"prefix"`
 	// Return only results with matching rpki status: valid, invalid or unknown
 	RpkiStatus param.Field[BGPRoutePfx2asParamsRpkiStatus] `query:"rpkiStatus"`
diff --git a/radar/bgproute_test.go b/radar/bgproute_test.go
index c85cd90a04e..3096acd1535 100644
--- a/radar/bgproute_test.go
+++ b/radar/bgproute_test.go
@@ -59,10 +59,11 @@ func TestBGPRoutePfx2asWithOptionalParams(t *testing.T) {
 		option.WithAPIEmail("user@example.com"),
 	)
 	_, err := client.Radar.BGP.Routes.Pfx2as(context.TODO(), radar.BGPRoutePfx2asParams{
-		Format:     cloudflare.F(radar.BGPRoutePfx2asParamsFormatJson),
-		Origin:     cloudflare.F(int64(0)),
-		Prefix:     cloudflare.F("1.1.1.0/24"),
-		RpkiStatus: cloudflare.F(radar.BGPRoutePfx2asParamsRpkiStatusInvalid),
+		Format:             cloudflare.F(radar.BGPRoutePfx2asParamsFormatJson),
+		LongestPrefixMatch: cloudflare.F(true),
+		Origin:             cloudflare.F(int64(0)),
+		Prefix:             cloudflare.F("1.1.1.0/24"),
+		RpkiStatus:         cloudflare.F(radar.BGPRoutePfx2asParamsRpkiStatusInvalid),
 	})
 	if err != nil {
 		var apierr *cloudflare.Error