A mysterious number appears on your phone. A vendor calls without introduction. A charge has no description, and only a phone number appears on the statement. In each case, the question is the same: Whose number is it and what company is behind it?
The short answer: use SignalHire. Paste the number into its search bar, and it cross-references 850M+ verified profiles across 40+ data sources to return the name of the company, address, contacts of employees and verified emails in real time — even when looking for B2B numbers that appear nowhere on public directories. For the rest, six different methods apply depending on which type of number you have.
The need to identify unknown business numbers is growing.
A 2024 McKinsey report on sales productivity found that sales teams spend up to 27% of their time on manual data lookup and contact verification tasks, time that compounds directly into lost revenue.
There are many things you can do to perform reverse business phone lookup and this guide will provide you with 6 methods of performing reverse business phone lookups, ranked from the lowest accuracy and speed at revealing them (assuming the free basic tools won’t give your query good results) getting free or low-cost beginner out-of-the-box tools you can start using in under 30 seconds today, through to the professional database that finds verified results when else is leaving you empty-handed.
How These Methods Compare
| Method | Free? | Accuracy | Best For | Speed |
| Google / Bing search | ✅ Yes | Low–Medium | Publicly listed businesses | Instant |
| Business directories (Yelp, Infobel, BBB) | ✅ Yes | Medium | Local and registered businesses | Fast |
| Google Maps | ✅ Yes | High | Any business with a Google listing | Instant |
| Reverse lookup services (WhitePages, Truecaller) | Freemium | Medium | Consumer and business numbers | Fast |
| LinkedIn Companies | ✅ Yes | High | B2B companies and organizations | Fast |
| SignalHire | Trial (free tier) | Very High , verified | B2B contacts, bulk lookup, verified data | Real-time |
Why Does This Matter?
Whether trying to verify the legitimacy of an unfamiliar caller, reach a company in less than three clicks, or you’re seeking to confirm a business is real before handing over cash, knowing how to look up a business by phone number can be a valuable asset. It can assist you in saving time and energy while looking up contact information rapidly and efficiently.
These basic implements will assist you to locate companies by telephone number fast and simply.
Method 1: Search Engines (Google, Bing)
The fastest initial step to locate an agency via phone number is to paste that number directly into a search engine. In simple terms, business contact details from company web pages, directories, review sites and social media accounts along with Google and Bing are both indexed so a legitimate business number will frequently provide an immediate outcome within the first page.
Try these search formats:
- “123-456-7890” exact match in quotes
- 123-456-7890 company adds context
- 123-456-7890 site:yelp.com restricts to a specific directory
Limitations
Search engines show only the publicly indexed information. If it’s a small business or mobile number, or one that hasn’t established much of a web presence, the results will be few and far between. They also serve the most recently indexed version of a page, not necessarily the most up to date info and hence you may see outdated business details.
Best Used When
You are doing a super rapid first check on a number that is probably linked to an obvious, reputable business. It takes 30 seconds, and it goes straight to the point, sometimes without any more processing.
Method 2: Business Directories (Yelp, Infobel, BBB)
Business directories: They offer searchable databases of businesses, which include contact information like phone numbers. Searching for a number in these directories can yield the name of the registered business, address and category, and sometimes customer reviews.
Recommended directories:
- Yelp, strong coverage for US consumer-facing businesses; search by phone number directly
- Infobel , international coverage; useful for non-US numbers
- Better Business Bureau (BBB), US business verification; useful for confirming whether a business is registered and accredited
Example of a company page from the SignalHire company directory. BUT: SignalHire allows searching in its directory by name. How to use this tool to search by phone number is described below.
Most directories include a field for searching by phone number; enter the number you’re looking for, with or without a country code, and look through the matching listings.
Limitations
Directories depend on companies to self-register, or on crowdsourced public data, so coverage can tend to fall short for smaller operations and newer enterprises (or B2B players that lack a consumer-facing directory presence). Data can trail any changes in the world outside of it — whether ownership, address or contact information.
Best Used When
You have a phone number for a local business, service provider, or consumer-facing company. Directory search is especially useful for retail, hospitality, healthcare and professional services.
Method 3: Google Maps
Google Maps is one of the best free tools to identify a company by phone number, and also one of the most underutilized. Google lists business entries from its Maps platform separately from regular web results, and businesses that don’t rank well within standard search often do appear within Maps.
Step-by-step:
- Open Google Maps in a browser or the mobile app
- Paste the phone number into the search bar exactly as you have it
- If the number is associated with a registered Google Business Profile, the listing will appear with the business name, address, category, hours, and reviews
Limitations
This approach only works for businesses who have claimed or been assigned a Google Business Profile. Companies without a Maps listing, like many B2B companies, consultancies and remote-only operations won’t show up. It also won’t yield useful results for mobile numbers or non-local direct-dial lines.
Best Used When
You are trying to find a business that is likely tied to a physical office or place of service. Google Maps can be most useful for confirming whether a number is trusted because it belongs to an actual registered business.
Method 4: Reverse Phone Lookup Services (WhitePages, Truecaller)
Reverse phone lookup services have consolidated databases that include both personal and business numbers matched to their registered owners. Specifically for business numbers, these services can reveal the company name, its address and sometimes related contact information.
- WhitePages: Amongst the oldest and most complete US phone number databases. The free tier displays only basic ID; paid reports offer full address, business type and contact points. Business Phone Search — A Key Feature.
- Truecaller: That is truecaller, the world’s largest crowd-source phone number database, host over 3 billion numbers. Very strong for mobile numbers, and used widely to identify unknown callers in real time. If you enter the number on the Truecaller website or application, you can easily see the registered name along with any associated business profile.
Limitations
WhitePages has best coverage in the US Truecaller’s might is in areas outside of North America, South Asia and africa and particular components of Europe however its US database has ballooned. Both fail to return consistent detail in B2B contact data (email, company department, LinkedIn profile) for corporate business numbers.
Best Used When
You just received a call from an unknown number and need to quickly identify if it is from a person or business before returning the call. Also good as a means of cross-reference check after finding a company name via some other way.
Method 5: LinkedIn Company Search
For B2B phone numbers, numbers that belong to companies rather than individual consumers, LinkedIn’s company search can surface the business even if regular search or directories fall short.
Step-by-step:
- Search the company name (if you’ve found it through another method) directly in LinkedIn’s search bar and select Companies in the filter
- Alternatively, search the phone number combined with a company name on Google, then navigate to the LinkedIn company page from the results
- On the company page, check the About section for the listed contact information
Limitations
Due to the fact that LinkedIn does not allow direct phone number search, pasting a number in the LinkedIn search bar will never yield a company result. It serves as a second step, once you’ve identified the name of the company through another means, or as a way to confirm that your search result for a company name is legitimate and active.
Best Used When
You’ve settled on a company name and want to look it up, get a sense of its size, structure and industry or find the right person to reach out to inside. LinkedIn is especially helpful when conducting due diligence before engaging with a new vendor or business partner.
Method 6: Find Any Company by Phone Number with SignalHire
Why This Method Works When Others Don’t
SignalHire is a professional contact intelligence platform that searches a database of 850M+ verified profiles across 40+ data sources. When you enter a phone number, it cross-references that number against verified business and contact records, returning the associated company name, website, address, employee contacts, and linked professional profiles in real time.
The kicker that sets it apart from the methods above: SignalHire does not rely on company having a Google listing, directory entry, or a Truecaller registration. It queries its own independently verified database — something that explains why it returns results for B2B companies, direct-dial lines and organizations that don’t appear in consumer-facing directories. It does this in full adherence to GDPR and CCPA, exposing only publicly available or user-approved data.
Why SignalHire Outperforms Free Lookup Tools
| Search Engine | Google Maps | WhitePages | SignalHire | |
| Returns verified company name | Sometimes | Yes (if listed) | Sometimes | ✅ Yes |
| Returns employee contacts | ❌ No | ❌ No | ❌ No | ✅ Yes |
| Returns verified email addresses | ❌ No | ❌ No | ❌ No | ✅ Yes |
| Works for B2B / unlisted numbers | ❌ Rarely | ❌ Rarely | ❌ Rarely | ✅ Yes |
| Supports bulk lookup (1,000+) | ❌ No | ❌ No | ❌ No | ✅ Yes |
| GDPR / CCPA compliant | N/A | N/A | N/A | ✅ Yes |
Step-by-Step: Find a Company by Phone Number with SignalHire
- Create a free account at signalhire.com, which includes 5 searches per month at no cost
- Install the SignalHire browser extension for Chrome or Firefox to run searches directly from LinkedIn and other platforms
- Enter the phone number into the main search bar on the SignalHire dashboard
- Click Reveal Contacts to access the verified company information, associated employee contacts, email addresses, and linked profiles
Sales teams can use the SignalHire API to build prospect lists right from inbound call data, adding phone-to-company look up in their CRMs, automating contact enrichment through an application and eliminating manual searching. The email finder also allows you to cross-reference company phone data versus verified employee emails, in the same lookup.
Conclusion
For the vast majority of publicly held companies, Google, Google Maps and Yelp will give you an answer in less than a minute. For B2B numbers, direct-dial lines and any company not in the business of being listed publicly, no free tools consistently return anything.
And that’s where SignalHire fills the gap, returning the company name, employee contacts, and verified email addresses from 850M+ profiles in a single lookup.
Start with 5 free searches to see the difference.
FAQ: Finding a Company by Phone Number
How do I find a company by phone number?
If you start with Google, or Google Maps, paste the number into the search bar for an immediate result on publicly listed businesses. So this finds the B2B numbers, unlisted lines or anything that comes up with no results on free tools and then searches 850M+ verified profiles through SignalHire which returns the respective company with full contact in real time.
Can I reverse lookup a business phone number for free?
Yes, using Google search, Google Maps, Yelp or WhitePages. Free tools are effective for consumer-facing businesses with an existing online presence and directory listing. When dealing with B2B firms or direct-dial phone numbers/unlisted organizations, free methods often turn up empty. (5 searches/month free tier available)
What is the best tool to identify a company from its phone number?
If you have a publicly listed businesses then Google Maps give the best free results. With one phone number alone, SignalHire guarantees verified company data and employees’ contacts with email addresses of B2B contacts and professional prospecting when free tools are not enough.
How accurate are business phone number lookup services?
Normal Operating Range (SOR) The accuracy is true only for tools and types of number used. Directory-based tools (WhitePages, Yelp) are usually only accurate for businesses that bother to update their listings. Service as Call for businesses with Google Business Profile on Google Maps Before being surfaced, results are verified across 40+ sources, making SignalHire the most reliable source.
Is it legal to look up a company by phone number?
Yes. What we do know: Searching for publicly available business information by phone number is legal. SignalHire shows only open or shared with the user business data, fully complying with GDPR, CCPA regulations. No matter what instruments you upset any contact data to annoy or calling is prohibited premises that had not consented be contacted.
