diff --git a/hack/default-branches-report.sh b/hack/default-branches-report.sh
new file mode 100755
index 0000000000..f9c1bdf889
--- /dev/null
+++ b/hack/default-branches-report.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+# Copyright 2021 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+readonly kubernetes_orgs=(
+    kubernetes
+    kubernetes-sigs
+    kubernetes-client
+    kubernetes-csi
+)
+
+readonly gh_api_cmd=(
+    gh api
+    --field=per_page=100
+    --paginate
+    --method=GET
+)
+
+function ensure_dependencies() {
+  if ! command -f gh >/dev/null; then
+      >&2 echo "gh not found. Please install: https://cli.github.com/manual/installation"
+      exit 1
+  fi
+}
+
+function main() {
+  local orgs=("$@")
+  ensure_dependencies
+  for org in "${orgs[@]}"; do
+      echo "* ${org}"
+      "${gh_api_cmd[@]}" "/orgs/${org}/repos" \
+          --field=sort=full_name \
+          --template \
+          '{{range .}}  * [{{if eq .default_branch "master"}} {{else}}X{{end}}] [{{.full_name}}]({{.html_url}}) {{"\n"}}{{end}}'
+  done
+  echo
+  echo "Manual inspection required if you want to link issues that tracked default branch name migration"
+}
+
+args=("${@:1}")
+if [ ${#args[@]} -eq 0 ]; then 
+  args=("${kubernetes_orgs[@]}")
+fi
+
+main "${args[@]}"