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Fax Number Lookup: Top 4 Tips and Tricks to Find a Fax Number

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finding fax numbers

You’ll need a fax number when you need to send or receive documents using a method other than email or online messaging. For instance, many governmental agencies and health care organizations rely on fax to transmit sensitive information securely. 

Whether you’re sending a fax through a traditional fax machine or through an online service, you’ll still need the recipient’s fax number. For those unfamiliar with faxing procedures, a targeted fax number lookup using directory listings, company contact pages, or verified databases will often locate the right number. A careful fax number lookup also confirms area codes and international formats. 

However, if you’re mostly familiar with phone and email communications, you may not know how to find a fax number — whether that’s your intended recipient or your own. Learning how to find a fax number quickly can save you time, prevent delays, and ensure your documents reach the right destination. Today, there are multiple simple ways available to figure out how to find a fax number, from online tools to directory searches, making the process much easier than it used to be.


how to find the fax number

What is a Fax Number Lookup?

A fax number lookup helps you find the right fax number for various businesses and organizations. You might need to use a fax number lookup to:

  • Check that you’re sending a fax to the right place
  • Find the fax number for a particular company or person 
  • Make sure your own fax number is listed correctly 

Looking up a fax number could involve using a directory, checking an organization’s website, or even calling to ask what their fax number is. 

How to Locate Your Own Fax Number

Sometimes, you might need to confirm or verify your own fax number. Here’s how to get a fax number for your own organization:

  • Look at your old sent faxes to see if the sender’s number is listed on the fax header
  • Check if your fax number is listed on your fax machine or in its settings 
  • Send yourself a fax to your email or another fax number you know to see what the number is 

If you use online fax services like eFax, you can usually locate fax number information in your account profile. You can also ask your admin staff or office manager for the information. 

4 Ways To Find Fax Numbers

There are multiple ways to find a fax number. You may be able to contact the recipient directly, or you can also search the internet for a directory or the business’s website. The best method for you to lookup a fax number will depend on what information you already have. If you’re unsure how to find a fax number in your situation, the following methods will guide you.

1. Contact the Recipient

The simplest and most direct way to find a fax number is to contact the person or business directly and ask what their fax number is. This, of course, depends on having some form of contact information for them already, like a telephone number or email address. If you can’t contact them directly, you will have to use one of the below fax number lookup methods.

2. Check Websites To Find a Fax Number Online

If you cannot reach out to the recipient to ask for their fax number, you can always rely on the internet. There are a couple of ways you can search online for a fax number.

A. Searching Websites With a Telephone Directory

Online telephone directories can be helpful when searching for a fax number. Directories are made to be easily searchable, so as long as you know the name of the person or business you need to contact, you can look up the directory for the appropriate fax number. Some sites include fax numbers alongside phone numbers, but if you can only find the phone number, you can also call the business and ask them for their fax number.

Many people use these directories specifically as a fax number lookup tool.

B. Navigating Business Websites for Fax Numbers

Most businesses have a website, and that website will usually contain the business’s contact information. The fax number will probably be located in the “Contact Us” section of their website. If no fax number is listed, you can likely find a phone number or email address to contact them for their fax number. You may be able to reach them via email or social media as well. 

3. Use Search Engines

To find a fax number via search engine, type the name of the business into the search field and add the phrase “fax number” after it. The search results may contain a fax number, but if you don’t see it, you may at least find their website or other contact information so you can ask for their fax number directly. 

4. Contact Your Fax Service Provider

Your fax service provider can also be of assistance when trying to find a fax number. If you need your own fax number, they can provide it to you. 

A. Requesting Fax Numbers for Incoming Faxes

Traditional incoming faxes will display the number that they were sent from on the Caller ID of the fax machine. If you are using an online fax service that doesn’t have identification included on it, you can contact the provider to request the number that the fax was sent from.   

B. Checking Sent Fax Documents for Fax Numbers

Most faxes you receive will include a cover sheet with useful contact information. A fax’s cover letter should have the identity of the sender, including their name or business name, the sender’s fax number, and the time and date. Even if the cover sheet doesn’t include the sender’s fax number, it can provide helpful information for your online search. 

If there is no cover sheet, you can check for the information within the header or footer of the document. With normal faxing, the number that a fax was sent from is included in the footer. If the fax has been sent within the United States, the first three digits are the area code, followed by the fax number. You should be able to locate a ten or eleven-digit number on each page. If the fax was sent internationally, the number of digits including the country code will depend on where it was sent from. 

If you received a document through an internet fax service or email faxing service, fax information may still be included in the footer. Scroll to the bottom of a page and lookup for the fax number there.ookup a fax number will depend on what information you already have. 

1. Contact the Recipient

The simplest and most direct way to find a fax number is to contact the person or business directly and ask what their fax number is. This, of course, depends on having some form of contact information for them already, like a telephone number or email address. If you cannot contact them directly, you will have to use one of the below methods. 

2. Check Websites To Find a Fax Number Online

If you cannot reach out to the recipient to ask for their fax number, you can always rely on the internet. There are a couple of ways you can search online for a fax number.

A. Searching Websites With a Telephone Directory

Online telephone directories can be helpful when searching for a fax number. Directories are made to be easily searchable, so as long as you know the name of the person or business you need to contact, you can look up the directory for the appropriate fax number. Some sites include fax numbers alongside phone numbers, but if you can only find the phone number, you can also call the business and ask them for their fax number.

B. Navigating Business Websites for Fax Numbers

Most businesses have a website, and that website will usually contain the business’s contact information. The fax number will probably be located in the “Contact Us” section of their website. If no fax number is listed, you can likely find a phone number or email address to contact them for their fax number. You may be able to reach them via email or social media as well. 

3. Use Search Engines

To find a fax number via search engine, type the name of the business into the search field and add the phrase “fax number” after it. The search results may contain a fax number, but if you don’t see it, you may at least find their website or other contact information so you can ask for their fax number directly. 

4. Contact Your Fax Service Provider

Your fax service provider can also be of assistance when trying to find a fax number. If you need your own fax number, they can provide it to you. 

A. Requesting Fax Numbers for Incoming Faxes

Traditional incoming faxes will display the number that they were sent from on the Caller ID of the fax machine. If you are using an online fax service that doesn’t have identification included on it, you can contact the provider to request the number that the fax was sent from.   

B. Checking Sent Fax Documents for Fax Numbers

Most faxes you receive will include a cover sheet with useful contact information. A fax’s cover letter should have the identity of the sender, including their name or business name, the sender’s fax number, and the time and date. Even if the cover sheet doesn’t include the sender’s fax number, it can provide helpful information for your online search. 

If there is no cover sheet, you can check for the information within the header or footer of the document. With normal faxing, the number that a fax was sent from is included in the footer. If the fax has been sent within the United States, the first three digits are the area code, followed by the fax number. You should be able to locate a ten or eleven-digit number on each page. If the fax was sent internationally, the number of digits including the country code will depend on where it was sent from. 

If you received a document through an internet fax service or email faxing service, fax information may still be included in the footer. Scroll to the bottom of a page and lookup for the fax number there.

Checking Sent Fax Documents for Fax Numbers

Faxing on the Go: Mobile Solutions for Sending and Receiving Faxes Online

Faxing used to require having direct access to a large fax machine. But in today’s era of fast and portable technology, you can send a fax from anywhere with a Wi-Fi or data connection — this can ease a lot of faxing worries. Online fax providers like eFax provide convenience and ease of use. For instance, you can receive incoming faxes as PDF files. You can also send and receive faxes through any computer or your phone using a mobile app. Contact us to see how we can help you make faxing quicker and easier.

FAQ’s Around Finding a Fax Number

How can I find a business’s fax number quickly?

You can look for a business’s fax number on their website, or conduct a business fax number lookup in one of the many business directories. There are many ways to find a fax number online quickly, or you can call the business to ask them what the fax number is. 

Can I look up a fax number online for free?

While many fax directory searches cost money to use, you can do your own business fax number lookup by Googling the company you want to fax and looking for a fax number on their website or other listings. 

How do I find a government or healthcare organization’s fax number?

You can find most government and healthcare organization fax numbers online on the organization’s website. 

Is it possible to find someone’s fax number using their email or phone number?    

It may be possible to find a fax number if you have someone’s email or phone number. Many directory listings will include these forms of contact information alongside a fax number, so a search for someone’s email can help you look up their fax number, too. 

How do I verify that the fax number I found is correct?

You can send a test fax to the fax number to make sure it’s correct. You can also try dialing the fax number from a phone; if you hear beeps and squawks down the line, you’ll know you’ve reached a fax machine. Finally, you can cross-reference the fax number in fax directory searches and other business fax number lookup tools to make sure it’s correct.

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