diff --git a/src/protocol.h b/src/protocol.h
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -358,7 +358,12 @@
     NODE_AVALANCHE = (1 << 24),
 };
 
-std::string serviceFlagToStr(uint64_t mask, int bit);
+/**
+ * Convert service flags (a bitmask of NODE_*) to human readable strings.
+ * It supports unknown service flags which will be returned as "UNKNOWN[...]".
+ * @param[in] flags multiple NODE_* bitwise-OR-ed together
+ */
+std::vector<std::string> serviceFlagsToStr(const uint64_t flags);
 
 /**
  * Gets the set of service flags which are "desirable" for a given peer.
diff --git a/src/protocol.cpp b/src/protocol.cpp
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -255,8 +255,14 @@
     return allNetMessageTypesVec;
 }
 
-std::string serviceFlagToStr(const uint64_t mask, const int bit) {
-    switch (ServiceFlags(mask)) {
+/**
+ * Convert a service flag (NODE_*) to a human readable string.
+ * It supports unknown service flags which will be returned as "UNKNOWN[...]".
+ * @param[in] bit the service flag is calculated as (1 << bit)
+ */
+static std::string serviceFlagToStr(const size_t bit) {
+    const uint64_t service_flag = 1ULL << bit;
+    switch (ServiceFlags(service_flag)) {
         case NODE_NONE:
             // impossible
             abort();
@@ -285,3 +291,15 @@
             return stream.str();
     }
 }
+
+std::vector<std::string> serviceFlagsToStr(const uint64_t flags) {
+    std::vector<std::string> str_flags;
+
+    for (size_t i = 0; i < sizeof(flags) * 8; ++i) {
+        if (flags & (1ULL << i)) {
+            str_flags.emplace_back(serviceFlagToStr(i));
+        }
+    }
+
+    return str_flags;
+}
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -754,15 +754,10 @@
 QString formatServicesStr(quint64 mask) {
     QStringList strList;
 
-    // Don't display experimental service bits
-    for (int i = 0; i < 64; i++) {
-        uint64_t check = 1ull << i;
-        if (check > NODE_LAST_NON_EXPERIMENTAL_SERVICE_BIT) {
-            break;
-        }
-        if (mask & check) {
-            strList.append(QString::fromStdString(serviceFlagToStr(check, i)));
-        }
+    constexpr uint64_t nonExperimentalMask =
+        (NODE_LAST_NON_EXPERIMENTAL_SERVICE_BIT << 1) - 1;
+    for (const auto &flag : serviceFlagsToStr(mask & nonExperimentalMask)) {
+        strList.append(QString::fromStdString(flag));
     }
 
     if (strList.size()) {
diff --git a/src/rpc/util.cpp b/src/rpc/util.cpp
--- a/src/rpc/util.cpp
+++ b/src/rpc/util.cpp
@@ -866,14 +866,10 @@
 }
 
 UniValue GetServicesNames(ServiceFlags services) {
-    const uint64_t services_n = services;
     UniValue servicesNames(UniValue::VARR);
 
-    for (int i = 0; i < 64; ++i) {
-        const uint64_t mask = 1ull << i;
-        if (services_n & mask) {
-            servicesNames.push_back(serviceFlagToStr(mask, i));
-        }
+    for (const auto &flag : serviceFlagsToStr(services)) {
+        servicesNames.push_back(flag);
     }
 
     return servicesNames;