Below is a popular webmaster's test with results showing every single web page known to Google,
where your PHONE NUMBER exists, together with specific RELEVANT KEYWORDS.
To the extent you are receiving internet traffic and quality phone inquiries,
you will soon learn where callers have found your phone number,
consistent with Google's PRO (Page Rank Order) algorithms.
To make sure that all websites are included you must type your phone number as shown.
123 456 7890
Typing the above neutral version of your phone number will assure that each website is included, regardless of which version it uses to display phone numbers.
Known versions of North American telephone numbers
(123)456-7890, (123) 456-7890, 123-456-7890, 123/456/7890, 123.456.7890
Now add a keyword which any web page worthy of your listing should contain.
Example: CKC Laboratories, Inc., an accredited EMI test lab, is listed on the TDE with this phone number (209)966-5240.
Type or copy & paste the following to search above: 209 966 5240 EMI testing
Example: Electronic Expediters, Inc., a component distributor, is listed on the TDE with this phone number (805)987-7171.
Type or copy & paste the following to search above: 805 987 7171 capacitors
Example: National Semiconductors, a DoD designated Trusted Foundry, is listed on the TDE with this phone number (888)498-1618.
Type or copy & paste the following to search above: 888 498 1618 foundry
and will usually list it first, followed by all the rest, consistent with its PRO algorithms.