NAP consistency: why your name, address and phone number must match everywhere.

NAP stands for Name, Address, Phone number. These three pieces of information appear across your website, your Google Business Profile, and every directory or platform where your business is listed. When they are consistent, Google can connect the dots between all those sources and build a clear, confident picture of your business. When they are not, it cannot.

This matters because local search rankings are partly built on that confidence. A business with consistent, well-corroborated information across many sources signals to Google that it is a real, stable, trustworthy entity. A business with contradictory information signals the opposite, even when the contradictions are minor and entirely unintentional.

Why small differences cause real problems

The mismatches that hurt local rankings are rarely dramatic. It is not usually a case of a completely wrong address. It is things like these:

"Siam Design Co. Ltd" on Google Business Profile, "Siam Design" on the Thai Yellow Pages, and "Siam Design Company Limited" on a trade directory. Three versions of the same legal name, and to Google's matching algorithm these look like three different entities that happen to share an address.

An address listed as "142/3 Silom Road" in one place and "142/3 Silom Rd, Bangrak" in another. Technically the same location, but the inconsistency creates ambiguity. Google values certainty. Ambiguity is a reason to rank a competitor whose information is cleaner.

A phone number formatted as "+66 2 123 4567" on the website and "02-123-4567" on a social media profile. Different format, same number. A human understands immediately. An algorithm treating these as text strings does not see an obvious match.

Every one of these variations is a small signal that something may not be right. Individually they are minor. Across ten or twenty listings, the accumulated inconsistency is a real drag on local ranking performance.

Where to check first

Google Business Profile first. This is the authoritative source. Whatever name, address, and phone number you set here becomes the version everything else should match. If you have not claimed and fully completed your GBP, that is the starting point before any of this makes sense. The GBP optimisation guide for Thailand covers this in full detail.

Your own website second. The footer of your site, the contact page, and any about page that mentions your address. All three should show the exact same information as GBP. This is the most authoritative source Google can read directly, so contradictions between your website and GBP are particularly damaging.

Core directories third. Bing Places, Apple Business Connect, Foursquare, and the Thai Yellow Pages are the highest-priority external citations for a Bangkok business. Claiming and correcting these four alone closes most of the NAP gap for most businesses.

Social media profiles fourth. Facebook, LinkedIn, and Instagram business profiles all show up in Google's entity understanding of your business. An old phone number sitting in a Facebook about section from 2019 is a live inconsistency. These are easy to fix and often forgotten.

Industry-specific listings last. Clutch, TripAdvisor, Wongnai, or whichever platforms are relevant to your sector. These carry good topical relevance signals and are worth getting right, but fixing them before the core four is not the highest-value use of time.

How to find all your listings

The most practical method is a Google search for your business name in quotes, with your phone number, and with your address. Run three separate searches:

"Your Business Name" — shows every indexed page that mentions your name. Look through the first three or four pages of results.

"Your phone number" — shows every page that displays your current or old phone number. Old numbers that have been replaced are a frequent source of confusion.

"Your address" — shows directory listings and mention pages that include your street address.

For a more systematic picture, Moz Local and BrightLocal both offer free or low-cost citation audit tools. You enter your business name and postcode and they return a report of where you are listed and what those listings say. These are worth running once a year as part of a regular technical SEO audit.

The Thai business name problem

Thai businesses face a specific complication that most English-language NAP guides do not address. Many companies have a registered Thai name, an English trading name, and sometimes an abbreviated version used informally. All three may appear across different directories depending on who submitted the listing and when.

The solution is to choose one English version and use it everywhere without exception. This should match the name on your legal registration documents or, if that creates a very long name, the name you use on all official correspondence. The important thing is consistency, not which version you pick.

If your business name includes "Co., Ltd." you need to decide whether to include it in directory listings. Including it everywhere is cleaner than some listings having it and others not. Most businesses in Bangkok drop it for readability, which is fine, as long as that is what every listing says.

What to do about listings you cannot edit

Not every directory lets you log in and change your information directly. Some directories pull data from aggregators, some require a manual review process, and some have listings that were auto-generated from old data and have no obvious way to claim them.

For these cases, the approach depends on the directory. Larger platforms like Foursquare, Yelp, and TripAdvisor all have a claim process. If a listing exists for your business and you did not create it, look for a "claim this business" or "is this your business?" link. The claim process typically involves verifying ownership by phone call, postcard, or email.

For minor directories where claiming is not possible and the incorrect listing is indexed, the practical reality is that a handful of minor inconsistencies on low-authority sites will not meaningfully hurt rankings once your core citations are clean. Focus effort on the sources that matter. Chasing every incorrect mention across the internet is not a good use of time.

For businesses running local SEO in Thailand alongside broader SEO work, NAP consistency is foundational. It is the kind of issue that does not prevent a site from ranking at all, but quietly limits how far it can climb in the map pack regardless of what else is done. Cleaning it up is not a one-time fix either. It needs checking after a phone number change, an office move, a rebrand, or any other event that changes the core business information.