Ever sent a text or made a call, only to realize the number was invalid or unreachable? Whether you’re a business trying to reach customers or just verifying a contact, knowing if a phone number is valid can save time and effort.

That’s where free phone carrier lookup and valid phone number checker tools come in handy. A carrier lookup helps you find out which network a number belongs to, which is great for SMS marketing and call routing on the other hand, a phone number checker confirms if the number is real, active, and safe to use-helping businesses avoid fake or outdated contacts.

In this guide, we’ll introduce you to 8 of the best free tools that make phone verification easy, reliable, and hassle-free.

But before we dive in, let’s first understand the main difference between Phone Carrier Lookup and Phone Number Checker.

Best Free Phone Carrier Lookup Tools

If you need to identify types of phone numbers and their carriers quickly and for free, these tools can help. They are useful for businesses looking to optimize SMS marketing, prevent fraud, and improve call deliverability. Here are some of the best free phone carrier lookup tools available

1. Messente Carrier Lookup

Messente provides a reliable carrier lookup service that helps businesses verify phone numbers before sending messages.

Features and Benefits:

• Identifies the phone carrier for any number.
• Helps prevent sending messages to invalid or unreachable numbers.
• Supports bulk lookup for businesses handling large contact lists.

How to Use Messente for a Free Phone Carrier Lookup:

Go to the Messente website and follow the below steps:

Step 1: Enter the phone number you want to check and select the country from the list.

Step 2: Click the “Check Number” button. In just a few seconds, the tool will validate the number and display carrier details if it’s valid.

Step 3: Want to check another number? Simply enter a new one in the search field and click “Check Carrier” again.

Step 4: For automatic lookups, create a free Messente account and use our Number Lookup API to streamline the process.

2. LandlineRemover

LandlineRemover is a user-friendly tool designed to identify whether a phone number is mobile, landline, or VoIP numbers, verify carrier types, and remove known litigator entries. This is especially useful for businesses that rely on SMS marketing, as it ensures messages are only sent to mobile numbers for better deliverability.

How Landline Remover Helps Identify Carrier Details:

• Instantly determines if a number is a landline, mobile, or VoIP.
• Helps businesses filter out non-mobile numbers to optimize SMS campaigns.
• Reduces SMS failures by ensuring only mobile numbers receive texts.
• Helps businesses stay compliant with SMS regulations by removing known litigators and checking state and federal DNC lists.

Landline Remover offers both free and paid options, so you can choose what suits your needs. The free version lets you look up individual numbers and provides basic details like carrier information, location, line type, etc. If you need bulk lookups and more in-depth number details, the paid option is the way to go.

3. ClearoutPhone Carrier Lookup

ClearoutPhone is a powerful phone number verification tool that provides accurate carrier lookup data. It helps businesses ensure they are contacting valid and reachable phone numbers, reducing wasted marketing efforts and improving overall efficiency.

Benefits of Using ClearoutPhone’s Carrier Lookup Tool:

• Comprehensive Insights: Get detailed carrier information, including number type Enhanced Data
• Accuracy: Ensure messages and calls reach real, active numbers.
• Targeting & Budget Optimization: Save time and money by avoiding invalid or non-mobile numbers in SMS campaigns.
• Fraud Prevention and Security: Identify fake or high-risk numbers before engaging with them.

4. CarrierLookup

CarrierLookup is a simple yet effective tool for phone carrier lookup and number verification. It helps users determine the carrier and validity of a phone number, making it a valuable resource for businesses and individuals looking to improve communication accuracy.

Key Features:

• Identify carrier and line-type information
• Filter out invalid or unreachable numbers
• Provide CarrierLookup API

Things to know before you try it:

CarrierLookup allows one free lookup per day for individual users. It also offers affordable lookup credits for those who need more searches—just $0.01 per lookup, with credits that never expire.

Best Free Phone Number Checker Tools

With spam detection becoming more aggressive, your calls might be getting blocked—even if you’re a legitimate business. Checking for spam flags ensures your calls actually reach people instead of getting ignored or auto-rejected.

Main Key Reasons to Monitor Your Caller Reputation:

• Nearly half of real calls (40%) are wrongly tagged as spam – This means your business could be losing valuable connections just because of a false label. (Source: Caller ID Reputation, 2023)
• Only 9% of calls marked as ‘Spam Likely’ or ‘Robocall’ get answered – If your number is flagged, there’s a 91% chance your call won’t go through, making your outreach efforts almost useless. (Source: Hiya State of the Phone Call Report 2023)

Here are some of the best free tools to check phone number validity and reputation:

1. IPQualityScore Phone Lookup

IPQualityScore’s Phone Number Lookup tool is designed to help businesses detect fraudulent, high-risk, or blacklisted numbers before engaging with them. This ensures safer communication and prevents wasted time on invalid contacts.

Why Use IPQualityScore?

• Analyzes phone number reputation to assess potential risks.
• Identifies disposable, inactive, or flagged numbers before calling or texting.
• Prevents fraud by verifying the legitimacy of phone numbers.
• Provides detailed carrier data, line type, and location information for enriched insights.

How It Works:

Using IPQualityScore is simple—just enter a phone number, and it instantly checks if it’s valid, active, and safe to contact. You’ll get details like carrier info, line type (mobile, landline, or VoIP), location, and risk level. Businesses can also upload lists for bulk checks or integrate the IPQS API for real-time verification. This helps avoid spam numbers, reduce fraud, and improve call success rates by ensuring you’re reaching real, active users.

2. BatchDialer

BatchDialer’s Reputation Check tool helps businesses avoid calling flagged, disconnected, or spam-labeled numbers, ensuring higher call success rates. By identifying risky numbers before dialing, businesses can protect their caller reputation and improve outreach efficiency.

How It Helps Maintain Call Success Rates:

• Detects flagged, spam-labeled, or inactive numbers before you call.
• Prevents spam labeling by helping businesses maintain a positive reputation.
• Boosts connection rates by ensuring only valid numbers are contacted.

BatchDialer also offers real-time reputation monitoring, so businesses can see how their numbers appear to customers. If a number gets flagged, the system alerts you when it’s time to replace or re-register it with carriers-helping you stay ahead of spam filters.

3. PhoneValidator

Phone Validator is a powerful tool that helps verify phone numbers for free, ensuring they are valid, active, and safe to contact. It identifies the phone line type (mobile, landline, or VoIP) and detects the carrier associated with the number.

Why Use Phone Validator?

• Identifies phone type (mobile, landline, or VoIP) for better targeting.
• Checks the phone company associated with the number.
• NEW! Fake Number Check – Detects invalid numbers that cannot be called or texted.
• Reduces wasted calls and SMS, improving campaign efficiency.

How It Works

Simply enter a phone number, and Phone Validator will instantly analyze its validity, type, and carrier details. The new Fake Number Check feature ensures you don’t waste time on disconnected or non-existent numbers. Businesses can also upload bulk lists for large-scale verification, helping them improve call and SMS deliverability.

4. KrispCall

KrispCall’s Free Phone Number Checker helps users quickly verify phone numbers to determine their validity and type. This tool is essential for businesses and individuals looking to improve communication efficiency by avoiding disconnected or fake numbers.

How It Works

Enter any phone number into the KrispCall Free Phone Number Checker, and the tool will instantly analyze its status, carrier details, and type. This helps businesses and individuals avoid calling disconnected numbers, improve SMS deliverability, and prevent communication failures.

Conclusion

Making sure you’re reaching the right people is key, whether you’re running an SMS marketing campaign, verifying customer details, or preventing fraud. The free phone carrier lookup tools and phone number checkers we covered can help you identify carrier details, check if a number is valid, and avoid calling or texting numbers that won’t connect.

If you’re looking for an all-in-one solution, LandlineRemover works as both a Phone Number Checker and a Phone Carrier Lookup Tool.