diff --git a/main.go b/main.go
index de5b9d9..42d9db2 100644
--- a/main.go
+++ b/main.go
@@ -193,14 +193,19 @@ func handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 
 	// Durchlaufe alle Fragen in der Anfrage
 	for _, q := range r.Question {
+		if strings.ToLower(q.Name) != q.Name {
+			if DEBUG {
+				fmt.Println("!", "handleDNSRequest", "case dns.TypeANY", "strings.ToLower(q.Name) != q.Name", strings.ToLower(q.Name), q.Name)
+			}
+		}
 		switch q.Qtype {
 		case dns.TypeA: // IPv4-Anfrage
-			ip, exists := D[q.Name]
+			ip, exists := D[strings.ToLower(q.Name)]
 			if exists {
-				rr, err := dns.NewRR(q.Name + " A " + ip.Ipv4)
+				rr, err := dns.NewRR(strings.ToLower(q.Name) + " A " + ip.Ipv4)
 				if err == nil {
 					if DEBUG {
-						fmt.Println("~", "handleDNSRequest", "case dns.TypeA", "D[q.Name]", D[q.Name], "q.Name", q.Name)
+						fmt.Println("~", "handleDNSRequest", "case dns.TypeA", "D[q.Name]", D[strings.ToLower(q.Name)], "q.Name", strings.ToLower(q.Name))
 					}
 					msg.Answer = append(msg.Answer, rr)
 				} else {
@@ -210,18 +215,18 @@ func handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 				}
 			} else {
 				if DEBUG {
-					fmt.Println("!", "handleDNSRequest", "case dns.TypeA", "not found in D", q.Name)
+					fmt.Println("!", "handleDNSRequest", "case dns.TypeA", "not found in D", strings.ToLower(q.Name))
 				}
 			}
 
 		case dns.TypeAAAA: // IPv6-Anfrage
 			// Beispielhafte IPv6-Adresse für Demonstration
-			ip, exists := D[q.Name]
+			ip, exists := D[strings.ToLower(q.Name)]
 			if exists && !strings.EqualFold(ip.Ipv6, "") {
-				rr, err := dns.NewRR(q.Name + " AAAA " + ip.Ipv6)
+				rr, err := dns.NewRR(strings.ToLower(q.Name) + " AAAA " + ip.Ipv6)
 				if err == nil {
 					if DEBUG {
-						fmt.Println("~", "handleDNSRequest", "case dns.TypeAAAA", "D[q.Name]", D[q.Name], "q.Name", q.Name)
+						fmt.Println("~", "handleDNSRequest", "case dns.TypeAAAA", "D[q.Name]", D[strings.ToLower(q.Name)], "q.Name", strings.ToLower(q.Name))
 					}
 					msg.Answer = append(msg.Answer, rr)
 				} else {
@@ -231,14 +236,14 @@ func handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 				}
 			} else {
 				if DEBUG {
-					fmt.Println("!", "handleDNSRequest", "case dns.TypeAAAA", "not found in D", q.Name)
+					fmt.Println("!", "handleDNSRequest", "case dns.TypeAAAA", "not found in D", strings.ToLower(q.Name))
 				}
 			}
 		case dns.TypePTR:
 			for a, b := range D {
 				iptocheck := reverseString(b.Ipv4)
-				if iptocheck+".in-addr.arpa." == q.Name {
-					rr, err := dns.NewRR(q.Name + " PTR " + a)
+				if iptocheck+".in-addr.arpa." == strings.ToLower(q.Name) {
+					rr, err := dns.NewRR(strings.ToLower(q.Name) + " PTR " + a)
 					if err == nil {
 						if DEBUG {
 							fmt.Println("~", "handleDNSRequest", "case dns.TypePTR", "IPv4", "found match", a, b)
@@ -252,8 +257,8 @@ func handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 				}
 
 				ip6tocheck, _ := IPv6ToPTR(b.Ipv6)
-				if ip6tocheck == q.Name {
-					rr, err := dns.NewRR(q.Name + " PTR " + a)
+				if ip6tocheck == strings.ToLower(q.Name) {
+					rr, err := dns.NewRR(strings.ToLower(q.Name) + " PTR " + a)
 					if err == nil {
 						if DEBUG {
 							fmt.Println("~", "handleDNSRequest", "case dns.TypePTR", "IPv6", "found match", a, b)
@@ -268,7 +273,7 @@ func handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 			}
 		default:
 			if DEBUG {
-				fmt.Println("+", "unhandledDNSRequest", r.Question, q.Name, q.Qclass, q.Qtype)
+				fmt.Println("+", "unhandledDNSRequest", r.Question, strings.ToLower(q.Name), q.Qclass, q.Qtype)
 			}
 		}
 	}