From bf3eac0fc8e37e0dcd9631051c838d0dbb1d33e6 Mon Sep 17 00:00:00 2001
From: Dirk Koopman <djk@tobit.co.uk>
Date: Mon, 8 Jun 2020 17:38:43 +0100
Subject: [PATCH] lengthen trailing numeric part of prefix

to allow things like GB5000GCM etc
---
 perl/DXUtil.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/perl/DXUtil.pm b/perl/DXUtil.pm
index 20837f2f..d23cb92e 100644
--- a/perl/DXUtil.pm
+++ b/perl/DXUtil.pm
@@ -384,7 +384,7 @@ sub is_callsign
 {
 	return $_[0] =~ m!^
 					  (?:\d?[A-Z]{1,2}\d{0,2}/)?    # out of area prefix /  
-					  (?:\d?[A-Z]{1,2}\d{1,2})      # main prefix one (required) 
+					  (?:\d?[A-Z]{1,2}\d{1,5})      # main prefix one (required) - lengthened for special calls 
 					  [A-Z]{1,5}                # callsign letters (required)
 					  (?:-(?:\d{1,2}))?         # - nn possibly (eg G8BPQ-8)
 					  (?:/[0-9A-Z]{1,7})?       # / another prefix, callsign or special label (including /MM, /P as well as /EURO or /LGT) possibly
-- 
2.34.1