If your business exists on Google, it has an assigned unique Customer Identification number, known as a CID number. Knowing your business’s CID number is helpful in many scenarios.
For instance, your CID # can help you precisely link your business’s online existence with your Google Business Listing via your website’s JSON-LD Schema. This linking helps to remove online ambiguity.
There are many ways to determine your business Google CID number; here are a couple.
Find a CID # from Google Maps
For technical users
Let’s start with the manual process. Basically, your Google CID is part of the source code for you business listing on Google Maps. So, if you go to your Google My Business Listing, view your source code and search for ludocid\\u003d
you’ll be taken to a section of the page source code directly before your CID#. You’ll select all the numbers after u003d
and before the next \\
.

The easy way to find your Business’s CID: Use a Chrome Extension
There are many free Google Chrome Extensions that you can use to quickly find your Company’s Google CID#. The plugin I use is GMB Page – CID & PlaceID Finder.

Navigate to your Business or Google Maps and then click to this Extension. You’ll see a modal box that displays your Google Place ID and CID.

Watch Me Show You How to Find your GMB (Google) CID Number Online
How do I use this CID number in JSON-LD for my Organization or LocalBusiness?
Once you have your Google CID # (Google Customer ID #), you can add a line to your JSON-LD Schema like this. You’ll replace the numbers after ?cid= with your CID #.
"sameAs": "https://www.google.com/maps?cid=5467313978617017528",
Happy Optimizing!
Still have questions? Here’s another great external resource for finding your CID on Google Maps.