diff --git a/utils/addrwidth.py b/utils/addrwidth.py
new file mode 100755
index 00000000..7b499f84
--- /dev/null
+++ b/utils/addrwidth.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+import json
+from prjxray import bitstream
+
+
+def gen_addrs():
+    for block_type, top_bottom, cfg_row, cfg_col, frame_count in bitstream.gen_part_base_addrs(
+    ):
+        yield bitstream.addr_bits2word(
+            block_type, top_bottom, cfg_row, cfg_col, 0), frame_count
+
+
+def run(verbose=False):
+    for addr, frame_count in sorted(gen_addrs()):
+        print("0x%08X: %u" % (addr, frame_count))
+
+
+def main():
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        description='Print number of frames at a base address')
+    args = parser.parse_args()
+
+    run(verbose=False)
+
+
+if __name__ == '__main__':
+    main()