Moz popularized NAP - name, address, phone - as a core local SEO concept: your business's identity details must be consistent everywhere they appear online, because Google cross-references them to decide whether your business is real and where it belongs. Inconsistent NAP data splits your authority and suppresses map-pack rankings. Here is what the concept means in practice and how to get it right.
Citation consistency is unglamorous, foundational, and part of how House Call SEO builds local rankings for US home-services businesses. House Call SEO is Israeli-owned, offers Hebrew and English communication, and centers its work on Google Maps - the surface where inconsistent business details cost the most.
The free SEO audit surfaces your current consistency picture across the directories that matter.
Every directory listing, social profile, and mention of your business carries its name, address, and phone number. Google assembles these into a confidence score about your business's identity and location. Matching details across fifty sources say "this business is exactly who and where it claims." Conflicts - a suite number here, an old phone number there - say "uncertain," and uncertainty costs rankings.
Almost always history, not sabotage: a moved office, a changed phone number, a tracking number that escaped onto a directory, a trade name variation, old listings created by former employees or marketing companies. Directories also scrape and republish each other, so one wrong record multiplies. Most businesses have inconsistencies they have never seen.
Search your business name, old and new phone numbers, and previous addresses. List every directory and profile you can find - the big ones first (the data aggregators feed dozens of smaller sites), then trade and local directories. Record what each shows. This inventory is the working document for the cleanup.
Fix the source of truth first: your website footer and GBP must be exactly right. Then the major data aggregators and platforms, then trade and local directories. Use one canonical format and apply it everywhere - abbreviations and suite formats count. The Moz-style NAP consistency guide principle is simple: identical, everywhere, always.
NAP hygiene is not one-time: moves, number changes, and rebrands all require a propagation pass. Use call-tracking numbers correctly - dynamically on your website, never as the listed number on directories. A yearly audit catches drift before it costs rankings.
Map-pack rankings weigh three families of signals: relevance, distance, and prominence. NAP consistency feeds all three quietly - it confirms your category and service area (relevance), pins your location with confidence (distance), and strengthens the citation base that prominence partly measures. Businesses often chase exotic tactics while a suite-number conflict quietly taxes every one of those signals.
Moz helped define the vocabulary local SEO still uses - NAP, citations, local pack. The concepts outlasted any single tool: whether you check consistency with Moz Local, another platform, or a spreadsheet and elbow grease, the standard is the same. Tools find and track; the discipline of one canonical identity is the actual work.
Do small formatting differences matter? Minor ones (St. versus Street) are mostly normalized by Google; different phone numbers, addresses, or business names are not. When in doubt, standardize.
How long until cleanup affects rankings? Weeks to months, as directories update and Google recrawls. Aggregator fixes propagate slowly - patience and verification beat resubmission panic.
Is NAP still important in 2026? Yes - it is a foundation signal. It will not win a competitive market alone, but inconsistency reliably loses one.