Image credits

All photos come from free sources (Wikimedia Commons, Openverse) and are used under the licences listed. Charts and diagrams are our own.

• German Area Codes: How to Read Any Landline Number: Uwe Rohwedder, CC BY-SA 4.0
• German Mobile Number Prefixes: 015, 016, 017 Explained: Santeri Viinamäki, CC BY-SA 4.0
• German Premium-Rate Numbers: 0180, 0900, 0137 Costs: Wikiolo, CC BY 4.0
• Germany Country Code +49: How to Dial and Write Numbers: Matti Blume, CC BY-SA 4.0
• One-Ring Scam in Germany: Why Calling Back Costs You: Lsjm, CC BY-SA 3.0
• Caller ID Spoofing in Germany: Fake Numbers on Your Screen: Ismael Olea, CC BY 4.0
• Fake Police Call Scam in Germany: How to Spot It: Jason Jacobs from Honolulu, USA, CC BY 2.0
• Missed Call From a German Number: Who Called and Is It Safe?: Matutinho, CC BY-SA 4.0
• Third-Party Billing Block in Germany: Drittanbietersperre: Bidouille82, CC BY-SA 3.0
• Block Spam Calls on iPhone, Android and German Landlines: Santeri Viinamäki, CC BY-SA 4.0
• Report Scam Calls in Germany: The Bundesnetzagentur Guide: Eckhard Henkel, CC BY-SA 3.0 de
• Trace Anonymous Calls in Germany: The Fangschaltung: Palatinatian, CC BY 3.0