How to Format a Phone Number Properly & Why It Matters

Knowing how to format a phone number properly is crucial for keeping clear records and efficient communication. Whether for personal or business use, accurate phone number formatting can save you time, ensure consistency, and allow you to reach out internationally without confusion.

You can follow local or international standards to format a phone number correctly. However, the phone number structures vary based on the country’s dialling system. To avoid mistakes, you’re better off using a phone number formatter to structure the number according to your needs.

In this guide, we’ll discuss the types of phone number formatting and the common mistakes to avoid if you manually format phone numbers.

Disclaimer: The article focuses primarily on North American standards, with international examples for reference.

What is Phone Number Formatting?

A mobile phone number format is the standardized format of presenting the number to ensure it’s verified and routed correctly across different mobile networks and countries.

A phone number is made up of different elements, including:

▶️ A Plus Sign (+)

The plus sign is the international calling prefix.

▶️ Country Code

A country code represents a specific country, such as +1 for the USA, +44 for the UK, and +33 for France.

▶️ Area Code/Network Identifier

After the country code comes a geographic or network identifier that varies by country and whether the phone number is landline or mobile. These next digits can be:

• Area codes (for landlines mostly)
  North America: Always 3 digits identifying geographic regions (e.g., 212 for Manhattan).
  UK, Australia: Variable-length codes (2-5 digits) for geographic areas.
• Mobile prefixes (most countries): Specific digit sequences that immediately identify mobile numbers and may indicate operators (if there is no mobile number portability).
• Network codes (many European countries): Typically 1-4 digits identifying the telecommunications provider.
• Service codes (some countries): Usually 1-3 digits indicating the type of service (premium, toll-free, etc.).

▶️ Local Phone Number

The last digits are the local unique phone number assigned to an individual. It identifies the person or business you are calling.

Why Is It Important to Format a Phone Number Correctly

A correctly formatted phone number is vital for various reasons:

Call Accurately Internationally

Writing an international phone number in the correct format ensures your calls reach the intended people every time. An incorrectly formatted phone number wastes time and costs money.

Clear Readability

Clearly formatted phone numbers are easier to understand. This makes it easy for everyone who accesses the phone numbers, such as on websites, databases, and emails.

Offers Global Accessibility

A proper phone number format for international phone numbers ensures that anyone can reach you. If you have a business and customers dial the wrong number, this means missed opportunities, which is not what you want.

Follows CRM-Specific Considerations

Customer Relationship Management (CRM) tools require a proper telephone number format. Most come with rules for validation, such as if the number must follow the international format or use another format.

When your CRM considers all the phone numbers in your database valid, it prevents errors and ensures your marketing team reaches qualified leads. Moreover, the correct format for phone numbers guarantees that messages are delivered successfully for automated calls and SMS campaigns.

Types of Phone Number Formatting

Phone number formats vary across countries and regions. The absence of a standard format to represent the various phone number structures would create chaos in multiple areas of life.

The format is often the same for both mobile and landline numbers, especially in standardized systems like E.164.

Let’s look at the most-used phone number formatting systems.

North American Numbering Plan Format

The North American Numbering Plan integrates many countries in the phone number format, namely North America and the Caribbean. It divides territories into numbering plan areas (NPAs), which include the three-digit area code and the 7-digit subscriber number unique to the owner.

The North American Numbering Plan gives you the standard US phone number format, such as: 212-555-8769

E.164 Phone Number Format

In the International phone network, telephone numbers are standardized using the E.164 format. This format allows phone calls and text messages to be routed correctly to their cell phones in different countries.

E.164 telephone numbers are formatted with the + sign, country code, area code, and the subscriber number and can only have a maximum of 15 digits overall without spaces, for example, +12125558769.

International Phone Number Format

An international phone number is a modified form of an E.164 number with added spaces to improve readability. For example, to write this US number in international format, it would go from +12025550185 to +1 202 555 0185.

RFC3966 Format

The RFC3966 Format is a regulated format for telephone numbers. It uses the tel: prefix followed by the phone number digits, including the country code, area code, and local phone number. For example:

• tel:2025550185
• tel:+12025550185

National Format

This is the format of a local phone number. In the USA, it adds a zero prefix when needed, and does not contain the country code. You use a national format when calling a local cell phone within your country. For example: 202 555 0185.

Comparison of Phone Number Formats

Let’s compare the mentioned phone number formats in a table below.

What is the Preferred format for a Mobile Number?

The preferred telephone number format depends on the purpose of the phone number. You can apply different formats for personal use, like saving a local number without the international prefix and country code.

The E. 164 format will benefit CRM systems, customer support, and international marketing, guaranteeing that phone numbers are accessible worldwide.

Common Mistakes When Formatting Telephone Numbers Manually

Now you know what each phone number format should look like, and can format the phone number manually. But first, you need to know some common pitfalls to avoid when formatting telephone numbers by hand.

Using the Wrong Separators

You can include separators in phone numbers, but don’t use them in the wrong place, or do not use those not recognized in standard phone number formatting. You can use spaces, hyphens, or parentheses, but you cannot use colons, underscores, slashes, or asterisks.

A correctly formatted phone number with a separator should look like this: 1-800-244-6785, +1 630-629-0000, or (555) 123-4567.

Omitting the Country Code in an International number

When you omit the country code in an international number, the call will not connect to the correct person. Never omit the country code; most importantly, always double-check the country code to avoid incorrect routing.

Using Letters in Phone Numbers

You should never use letters in a phone number. All telephone numbers are numerical.

Forgetting the + in International Phone Numbers

Phones need the + prefix to interpret the number as international. Otherwise, the cell phone will mistake it for a local number, leading to a failed connection.

Format a Phone Number with an Online Tool

It’s better to use a dedicated tool to avoid mistakes. Besides, there are free ones.

HeyLocate Free Phone Number Formatter allows you to choose the correct format for any phone number while meeting your specific needs.

HeyLocate service offers five different formats to choose from: the national format, international format, E.164 format, RFC3966 format, and database raw format.

To use HeyLocate Phone Number Formatter:

1. Go to Free Phone Number Formatter on heylocate.mobi. You don’t need an account or subscription plan.
2. Enter the desired phone number in the search bar and click Format Number. HeyLocate will produce the formatted number, and you can copy any or all of the formats provided.
3. HeyLocate also included additional information about that phone number, such as the country, area, network type, and time zone. It’s useful when you want to know the valid phone number format fast.

Conclusion

When you format a phone number correctly, you set yourself up for clarity, successful campaigns, and seamless data syncing. You don’t have to worry about misdirected calls and missed opportunities.

Use the Free HeyLocate Phone Number Formatter to format numbers correctly and remove guesswork. You will have standardized telephone numbers that are valid for your exact purpose.