diff --git a/felles/auth-filter/src/main/java/no/nav/vedtak/sikkerhet/jaxrs/AuthenticationFilterDelegate.java b/felles/auth-filter/src/main/java/no/nav/vedtak/sikkerhet/jaxrs/AuthenticationFilterDelegate.java
index 347bc0aad..7654d5a46 100644
--- a/felles/auth-filter/src/main/java/no/nav/vedtak/sikkerhet/jaxrs/AuthenticationFilterDelegate.java
+++ b/felles/auth-filter/src/main/java/no/nav/vedtak/sikkerhet/jaxrs/AuthenticationFilterDelegate.java
@@ -17,6 +17,7 @@
 import org.slf4j.MDC;
 
 import no.nav.vedtak.exception.TekniskException;
+import no.nav.vedtak.log.mdc.FnrUtils;
 import no.nav.vedtak.log.mdc.MDCOperations;
 import no.nav.vedtak.sikkerhet.kontekst.BasisKontekst;
 import no.nav.vedtak.sikkerhet.kontekst.KontekstHolder;
@@ -101,7 +102,7 @@ private static void setCallAndConsumerId(ContainerRequestContext request) {
     private static void setUserAndConsumerId(String subject) {
         Optional.ofNullable(subject).ifPresent(MDCOperations::putUserId);
         if (MDCOperations.getConsumerId() == null && subject != null) {
-            MDCOperations.putConsumerId(subject);
+            MDCOperations.putConsumerId(FnrUtils.maskFnr(subject));
         }
     }
 
diff --git a/felles/log/src/main/java/no/nav/vedtak/log/mdc/FnrUtils.java b/felles/log/src/main/java/no/nav/vedtak/log/mdc/FnrUtils.java
new file mode 100644
index 000000000..605108184
--- /dev/null
+++ b/felles/log/src/main/java/no/nav/vedtak/log/mdc/FnrUtils.java
@@ -0,0 +1,14 @@
+package no.nav.vedtak.log.mdc;
+
+public class FnrUtils {
+    private FnrUtils() {
+        // hide construktor
+    }
+
+    public static String maskFnr(String userId) {
+        if (userId.matches("^\\d{11}$")) {
+            return userId.replaceAll("\\d{5}$", "*****");
+        }
+        return userId;
+    }
+}
diff --git a/felles/log/src/main/java/no/nav/vedtak/log/mdc/MDCOperations.java b/felles/log/src/main/java/no/nav/vedtak/log/mdc/MDCOperations.java
index d1e6b0f64..c8f786bf4 100644
--- a/felles/log/src/main/java/no/nav/vedtak/log/mdc/MDCOperations.java
+++ b/felles/log/src/main/java/no/nav/vedtak/log/mdc/MDCOperations.java
@@ -1,5 +1,6 @@
 package no.nav.vedtak.log.mdc;
 
+import static no.nav.vedtak.log.mdc.FnrUtils.maskFnr;
 import static org.slf4j.MDC.get;
 import static org.slf4j.MDC.put;
 
@@ -37,9 +38,6 @@ public final class MDCOperations {
      * Bruk NAV_CONSUMER_ID isteden
      */ public static final String MDC_CONSUMER_ID = "consumerId";
 
-    // QName for the callId header
-    public static final QName CALLID_QNAME = new QName("uri:no.nav.applikasjonsrammeverk", MDC_CALL_ID);
-
     private MDCOperations() {
     }
 
@@ -78,13 +76,6 @@ public static void putUserId(String userId) {
         put(NAV_USER_ID, maskFnr(userId));
     }
 
-    private static String maskFnr(String userId) {
-        if (userId.matches("^\\d{11}$")) {
-            return userId.replaceAll("\\d{5}$", "*****");
-        }
-        return userId;
-    }
-
     public static String getUserId() {
         return Optional.ofNullable(get(NAV_USER_ID)).orElse(MDC_USER_ID);
     }
diff --git a/felles/log/src/main/java/no/nav/vedtak/log/util/LoggerUtils.java b/felles/log/src/main/java/no/nav/vedtak/log/util/LoggerUtils.java
index aeac655bc..d5c479d1a 100644
--- a/felles/log/src/main/java/no/nav/vedtak/log/util/LoggerUtils.java
+++ b/felles/log/src/main/java/no/nav/vedtak/log/util/LoggerUtils.java
@@ -71,11 +71,6 @@ public static String padEnd(String string, int minLength, char padChar) {
         if (string.length() >= minLength) {
             return string;
         }
-        StringBuilder sb = new StringBuilder(minLength);
-        sb.append(string);
-        for (int i = string.length(); i < minLength; i++) {
-            sb.append(padChar);
-        }
-        return sb.toString();
+        return string + String.valueOf(padChar).repeat(minLength - string.length());
     }
 }
diff --git a/felles/log/src/test/java/no/nav/vedtak/log/mdc/FnrUtilsTest.java b/felles/log/src/test/java/no/nav/vedtak/log/mdc/FnrUtilsTest.java
new file mode 100644
index 000000000..94b1b48bf
--- /dev/null
+++ b/felles/log/src/test/java/no/nav/vedtak/log/mdc/FnrUtilsTest.java
@@ -0,0 +1,31 @@
+package no.nav.vedtak.log.mdc;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+class FnrUtilsTest {
+
+    @Test
+    void maskerFnrTest() {
+        var fdato = "122314";
+        var pnr = "55555";
+        var fakeTestFnr = fdato + pnr;
+        var maskertFnr = FnrUtils.maskFnr(fakeTestFnr);
+        assertThat(maskertFnr).isNotBlank().startsWith(fdato).doesNotContain(pnr).endsWith("*****");
+    }
+
+    @Test
+    void ikkeMaskerVanligTekst() {
+        var ikkeFnr = "dev-fss:teamforeldrepenger:fpsak";
+        var ikkeMaskert = FnrUtils.maskFnr(ikkeFnr);
+        assertThat(ikkeMaskert).isEqualTo(ikkeFnr);
+    }
+
+    @Test
+    void ikkeMaskerOrgnr() {
+        var fakeOrgnr9siffer = "123456789";
+        var ikkeMaskert = FnrUtils.maskFnr(fakeOrgnr9siffer);
+        assertThat(ikkeMaskert).isEqualTo(fakeOrgnr9siffer);
+    }
+}