Understanding the Architecture: What Does CID Stand For?
In Google's internal terminology, CID stands for Customer ID. Within Google's indexing systems, it is referred to interchangeably as ludocid (Local Universal Directory Object Customer ID).
When a merchant or organization creates a listing on Google Business Profile (formerly Google My Business), Google does not index the listing by its business name or street address. Instead, Google assigns a unique 64-bit unsigned integer to that location.
For example, an established digital agency in Istanbul might have a decimal CID such as:
11401689387182079980
Why is the CID Number Permanent?
Unlike titles, phone numbers, or categories—which can be edited at any time in the Business Profile manager—the CID number is immutable.
Even if your company undergoes a major rebranding, moves to a new storefront 20 miles away, or modifies its primary industry category, Google maintains the historical link equity, user reviews, and photo uploads under this exact numerical identifier.
The only scenario in which a CID changes is if a listing is completely deleted and re-created from scratch, or if two distinct listings are merged into a single entity during a duplicate resolution ticket.
Decimal vs. Hexadecimal: Why You See 0x Prefixes
In many technical contexts—including Google Maps embed codes, share tokens, and browser query strings—the CID is formatted as a 64-bit hexadecimal number.
To convert between decimal and hex, Google takes the unsigned 64-bit integer and encodes it in base-16:
- Decimal Representation:
11401689387182079980 - Hexadecimal Representation:
0x9e3af016c2543fec
Our free CID Converter Tool allows you to paste either format and automatically generates the matching equivalent along with direct mapping URLs.
The 3 Critical SEO Benefits of Direct CID Links
1. Complete Protection Against Competitor Hijacking
When linking to your business from your website header, social media bios, or local citations, never link to a search query like google.com/maps/search/business+name.
A search link triggers Google Maps to evaluate the user's GPS coordinates. If the user is physically closer to a competitor with a similar name, Google will display the competitor's pin and sponsored ads.
A direct CID link (https://maps.google.com/?cid=YOUR_CID) forces the browser and the Google Maps mobile app to render only your profile, shutting out competitors completely.
2. Unambiguous Entity Binding via Schema.org hasMap
Google's web crawler and Google Maps algorithms operate as separate indexing clusters. To teach Google that your website domain is identical to your verified Maps listing, you must include the hasMap property in your LocalBusiness JSON-LD schema:
"hasMap": "https://maps.google.com/?cid=11401689387182079980"
For complete instructions, read our in-depth Schema.org hasMap Implementation Guide.
3. 100% Mobile App Deep Linking Reliability
Standard web URLs often get trapped inside in-app web views (e.g., inside Instagram or Facebook browsers). Direct CID URLs are recognized natively by both iOS (Apple URL schemes) and Android, launching the native Google Maps app smoothly with turn-by-turn navigation enabled.
How to Find Your CID Number in Under 5 Seconds
Instead of inspecting complex JavaScript source codes or decoding hex strings manually, you can use our free lookup utility:
- Copy any link to your Google Maps profile (even a short link like
maps.app.goo.gl/...). - Paste it into MapsCIDFinder.com.
- Click Resolve CID to get your permanent decimal CID, Hex value, direct review link, and QR code immediately.