NAP Consistency: Name, Address, Phone Number
NAP consistency means that a business's Name, Address and Phone Number are identical across all online directories, platforms and listings. Inconsistent NAP data confuses search engines and reduces trust in the business data.
Key Takeaways
- ✓NAP stands for Name, Address, Phone Number; in practice often extended to NAP+W with website and opening hours.
- ✓Inconsistent NAP data is one of the most common local SEO mistakes and weakens the entity and trust signal for search engines.
- ✓According to international analysis, businesses with consistent NAP data are 40 percent more likely to appear in the Local Pack.
- ✓Even small variations like St. instead of Street, missing +43 country code, or inconsistent legal form suffixes are considered different entries by machines.
- ✓Your own website is the primary NAP source; LocalBusiness Schema (JSON-LD) makes the data machine-readable and with only 3.97 percent adoption on mobile pages represents a differentiation lever.
- ✓For Austria, Google Business Profile, Herold, WKO Firmen A-Z, firmenabc, Apple Maps, and Bing Places are among the most important citation sources.
- ✓In the age of AI Overviews, clean NAP data determines citability; only 68 percent of contact details in ChatGPT and Perplexity match the Google Business Profile.
NAP consistency sounds trivial, but it's one of the most powerful levers in local SEO. Search engines use matching business data as a trust signal.
Why NAP consistency is crucial
Google compares business data across hundreds of sources. When name, address and phone number are identical everywhere, this increases trust in the accuracy of the data. Inconsistencies create uncertainty and can lead to Google displaying the wrong address or ranking the business lower in local search.
Even small deviations count: Street vs. St., +43 vs. 0043, GmbH vs. Gesellschaft mit beschränkter Haftung. For search engines, these are potentially different businesses.
NAP on your own website
Your own website is the primary NAP source. Complete contact details belong in the footer (visible on every page), on the contact page and in the imprint. Additionally, the data should be stored as LocalBusiness Schema Markup in JSON-LD format.
NAP in business directories
The most important directories in the DACH region for NAP consistency: In Austria, Herold.at, WKO-Firmenverzeichnis, FirmenABC.at and Cylex.at are the central platforms. In Germany Gelbe Seiten, Das Örtliche, 11880.com and GoYellow.de. In Switzerland local.ch, search.ch and yellowpages.swiss.
All entries must be character-for-character identical. When moving or changing names, all entries must be updated.
Audit and cleanup
A NAP audit includes: identifying all existing entries, documenting deviations, defining the primary NAP version and systematically updating all entries. Tools like Moz Local or BrightLocal automate the scanning process.
Data & Statistics
Citation-Signale erreichen 13 Prozent Gewicht für die KI-Suchsichtbarkeit und liegen damit über dem Google Business Profile mit 12 Prozent (On-Page 24 Prozent, Reviews 16 Prozent, Citations 13 Prozent, Links 13 Prozent, GBP 12 Prozent)
Whitespark / BrightLocal - Local Search Ranking Factors 2026 (AI Search Visibility Factors), international (2026)Unternehmen mit konsistenten NAP-Daten über die wichtigsten Citation-Quellen hinweg erscheinen mit 40 Prozent höherer Wahrscheinlichkeit im Local Pack
BrightLocal - Google's Local Algorithm and Local Ranking Factors (international) (2026)66 Prozent der Konsumenten verlieren das Vertrauen, wenn die Telefonnummer über Einträge hinweg falsch oder inkonsistent ist, 60 Prozent bei abweichender Adresse
BrightLocal - Business Listings Trust Report (1.141 US-Konsumenten) (2021)85 Prozent der Konsumenten fanden innerhalb eines Jahres falsche oder unvollständige Listing-Daten, 77 Prozent sahen widersprüchliche Angaben über verschiedene Verzeichnisse hinweg
BrightLocal - Business Listings Trust Report 2021 (US) (2021)Nur 68 Prozent der Unternehmenskontaktdaten in ChatGPT und Perplexity stimmen mit den Angaben im Google Business Profile überein
BrightLocal - Local SEO Statistics, zitiert SOCi Local Visibility Index (US/unspezifisch) (2026)46 Prozent aller Google-Suchanfragen haben lokale Absicht (einzelne, nicht offiziell bestätigte Quelle)
Search Engine Roundtable, Google-Vertreter auf der Secrets of Local Search Conference (global/US) (2018)LocalBusiness Schema wird auf nur 3,97 Prozent der mobilen Seiten eingesetzt; JSON-LD insgesamt auf 41 Prozent der Seiten in 2024, gegenüber 34 Prozent in 2022
Web Almanac 2024 (HTTP Archive) - Structured Data (2024)99 Prozent der befragten österreichischen KMU haben eine Website, aber 68 Prozent verfolgen keine klare Strategie zur Kundengewinnung über Suche (n=426, Q1 2026)
Coreflow - Studie zur Digitalisierung österreichischer KMU 2026 (Österreich) (2026)75 Prozent der befragten österreichischen KMU wissen nicht, ob ihre Inhalte in KI-Suchsystemen wie ChatGPT angezeigt werden
Coreflow - Studie zur Digitalisierung österreichischer KMU 2026 (Österreich) (2026)FAQ
What does NAP consistency mean in SEO?
Why is NAP consistency important for local SEO?
Which directories are most important for NAP consistency in Austria?
Are small variations like St. instead of Street really a problem?
How do I find out where my business data is inconsistent?
Why can my Google Business Profile be suspended due to NAP discrepancies?
What role does NAP consistency play for AI answers and AI Overviews?
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