diff --git a/README.md b/README.md
index d250493..08080c3 100644
--- a/README.md
+++ b/README.md
@@ -9,5 +9,6 @@ It is possible to
 - toggle columns
 - filter rows
 - negate filter rows with "!"
+- filter rows with regex, e. g. /10|15|80/
 - select rows with the mouse
 - download the plan in pdf format
diff --git a/band-plan.html b/band-plan.html
index 85a3e9a..84aecbc 100644
--- a/band-plan.html
+++ b/band-plan.html
@@ -103,6 +103,9 @@ div>label {
 				} else {
 					return true;
 				}
+			} else if (headerValue.startsWith("/") && headerValue.endsWith("/") && (headerValue.length > 1)) {
+				// filter regex
+				return RegExp(headerValue.toString().slice(1).slice(0,-1)).test(rowValue);
 			} else {
 				// filter normal
 				if (typeof rowValue !== "undefined") {
@@ -437,7 +440,7 @@ div>label {
 				"Base plan, regulation and css: use your own files for the band plan and css, URLs are possible, CORS needs to be allowed for the files, download standard files for examples\n"
 				+ "When Regulation is empty, all frequencies from base plan will be included\n"
 				+ "When CSS is empty or URL not available, colors, etc. will be gone\n"
-				+ "Filter rows with text in column headings, use filter starting with \"!\" as exclusion\n"
+				+ "Filter rows with text in column headings, use filter starting with \"!\" as exclusion, use filter with // as regex, e. g. /10|15|80/\n"
 				+ "Download list: saves .pdf of the current list (selection of rows apply)\n"
 				+ "Selection of rows with mouse possible\n"
 				+ "Download plans/css: get the yml and css files\n"