diff --git a/.env.dev b/.env.dev
index a2a585c4..86a8333b 100644
--- a/.env.dev
+++ b/.env.dev
@@ -8,5 +8,5 @@ OIDC_ISSUER=http://127.0.0.1:8080/realms/dev
 MAP_MAPLIBRE_URL=assets/maps/gruene_map.json
 MAP_ADDRESSSEARCH_URL=https://maps.gruene.verdigado.net/nominatim
 
-IP_SERVICE_V4_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
-IP_SERVICE_V6_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
+IP_V4_SERVICE_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
+IP_V6_SERVICE_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
diff --git a/.env.prod b/.env.prod
index a50869d6..9b7f05ce 100644
--- a/.env.prod
+++ b/.env.prod
@@ -7,5 +7,5 @@ OIDC_ISSUER=https://saml.gruene.de/realms/gruenes-netz
 MAP_MAPLIBRE_URL=assets/maps/gruene_map.json
 MAP_ADDRESSSEARCH_URL=https://maps.gruene.verdigado.net/nominatim
 
-IP_SERVICE_V4_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
-IP_SERVICE_V6_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
+IP_V4_SERVICE_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
+IP_V6_SERVICE_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
diff --git a/.env.staging b/.env.staging
index fc037ce2..04eb7d00 100644
--- a/.env.staging
+++ b/.env.staging
@@ -7,5 +7,5 @@ OIDC_ISSUER=https://saml.gruene.de/realms/gruene-app-test
 MAP_MAPLIBRE_URL=https://maps.gruene.verdigado.net/styles/wkapp/style.json
 MAP_ADDRESSSEARCH_URL=https://nominatim.maps.tuerantuer.org/nominatim
 
-IP_SERVICE_V4_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
-IP_SERVICE_V6_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
+IP_V4_SERVICE_URL=https://ipv4.api.gruene.verdigado.net/v1/client-info
+IP_V6_SERVICE_URL=https://ipv6.api.gruene.verdigado.net/v1/client-info
diff --git a/lib/app/auth/repository/auth_repository.dart b/lib/app/auth/repository/auth_repository.dart
index bbe22ab1..45fdf34c 100644
--- a/lib/app/auth/repository/auth_repository.dart
+++ b/lib/app/auth/repository/auth_repository.dart
@@ -114,7 +114,7 @@ class AuthRepository {
         }
 
         final challenge = await authenticator.fetchChallenge();
-        if (challenge != null && await _ipService.isOwnIP(challenge.ipAddress)) {
+        if (challenge != null && await _ipService.isOwnIp(challenge.ipAddress)) {
           stopPolling(timer);
           await authenticator.reply(
             challenge: challenge,
diff --git a/lib/app/constants/config.dart b/lib/app/constants/config.dart
index 1a8ca440..4f6cd072 100644
--- a/lib/app/constants/config.dart
+++ b/lib/app/constants/config.dart
@@ -17,8 +17,8 @@ class Config {
   static String get maplibreUrl => dotenv.env['MAP_MAPLIBRE_URL']!;
   static String get addressSearchUrl => dotenv.env['MAP_ADDRESSSEARCH_URL']!;
 
-  static String get ipServiceV4Url => dotenv.env['IP_SERVICE_V4_URL']!;
-  static String get ipServiceV6Url => dotenv.env['IP_SERVICE_V6_URL']!;
+  static String get ipV4ServiceUrl => dotenv.env['IP_V4_SERVICE_URL']!;
+  static String get ipV6ServiceUrl => dotenv.env['IP_V6_SERVICE_URL']!;
 
   static bool get androidFloss {
     // may be needed when building for f-droid store
diff --git a/lib/app/services/ip_service.dart b/lib/app/services/ip_service.dart
index de2affca..929c1157 100644
--- a/lib/app/services/ip_service.dart
+++ b/lib/app/services/ip_service.dart
@@ -4,15 +4,15 @@ import 'package:gruene_app/app/constants/config.dart';
 import 'package:http/http.dart' as http;
 
 class IpService {
-  Future<bool> isOwnIP(String ip) async {
-    final isInputIPv6 = isIPv6(ip);
-    final publicIp = await getPublicIp(useIPv6: isInputIPv6);
+  Future<bool> isOwnIp(String ip) async {
+    final isInputIpV6 = isIpV6(ip);
+    final publicIp = await getPublicIp(useIpV6: isInputIpV6);
     return ip == publicIp;
   }
 
-  Future<String?> getPublicIp({bool useIPv6 = false}) async {
+  Future<String?> getPublicIp({bool useIpV6 = false}) async {
     try {
-      final url = useIPv6 ? Config.ipServiceV6Url : Config.ipServiceV4Url;
+      final url = useIpV6 ? Config.ipV6ServiceUrl : Config.ipV4ServiceUrl;
 
       final response = await http.get(
         Uri.parse(url),
@@ -30,7 +30,7 @@ class IpService {
     }
   }
 
-  bool isIPv6(String ip) {
+  bool isIpV6(String ip) {
     try {
       final address = InternetAddress(ip);
       return address.type == InternetAddressType.IPv6;