Instantly identify the carrier, country, line type and fraud risk score of any phone number worldwide. Detect VoIP, disposable, and risky numbers before you trust them.
Each carrier lookup returns ten data points — enough to make confident decisions about any phone number.
Lookups return in under a second. No waiting, no queues — just instant carrier data when you need it.
Global coverage across every major mobile network in 200+ countries and territories worldwide.
No notifications sent to the number being looked up. The owner never knows their carrier was checked.
Results pulled from live number portability registries — accurate even after numbers are ported between carriers.
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Trusted by 2M+ users worldwide
Three steps. Zero friction. Free forever.
Choose a country code and type any phone number into the lookup form. Works with mobile, landline, VoIP, and toll-free.
Our system pings global carrier and number portability databases. No SMS or call is sent — the lookup is completely passive.
In under a second, see the carrier, country, line type, fraud risk score and more. No signup required to use the tool.
From fraud prevention to SMS deliverability, carrier intelligence powers smarter business decisions.
Detect VoIP and disposable numbers used by fraudsters to bypass verification systems and create fake accounts at scale.
Validate that signups come from real mobile users, not throwaway VoIP services. Cut chargebacks and reduce trust-and-safety incidents.
Identify which carrier handles each number to optimize SMS routing, comply with carrier-specific messaging policies, and improve delivery rates.
Confirm numbers are active mobile lines before launching cold outreach campaigns. Avoid wasted effort calling disconnected or invalid numbers.
Determine the country and region of origin for any number to comply with cross-border calling regulations and tax requirements.
Score lead lists by line type and carrier reputation. Mobile numbers from major carriers convert significantly better than VoIP or burner lines.
Every phone number is assigned to a specific carrier — the telecom provider that owns the network the number runs on. In the US, this might be Verizon, AT&T, or T-Mobile. In the UK, it could be EE, Vodafone, or O2. Carrier identity affects everything from call quality to SMS deliverability to whether a number is even reachable from certain countries.
Importantly, a number's current carrier may differ from its original carrier. Number portability laws in most countries let users keep their phone number when switching providers. A lookup that only checks the original assignment will be wrong much of the time. Our tool queries live portability registries to return the carrier the number is actually on right now.
VoIP (Voice over IP) numbers are virtual lines provided by services like Google Voice, TextNow, Twilio, and a long list of disposable number providers. They look like normal phone numbers but they're not tied to a physical SIM or device — anyone with internet access can grab one in seconds.
For most legitimate users, VoIP is fine — it's how millions of people manage second lines, business numbers, and international calling. But for fraud teams, dating platforms, banking services, and any business that relies on phone verification as proof of identity, VoIP is a red flag. Fraudsters use VoIP to create accounts at scale, bypass per-user signup limits, and hide their real identity. Detecting VoIP at signup blocks a huge slice of automated abuse.
Our fraud risk score combines multiple signals into a single 0-100 rating. The factors that push a score higher include: VoIP line type, recent porting activity (legitimate users rarely port numbers between obscure carriers in short windows), geographic mismatch between the number's country and the carrier's primary market, prepaid status, and patterns associated with known burner number services.
Scores below 30 generally indicate a clean, established mobile line. Scores between 30 and 70 suggest some risk worth investigating. Scores above 70 indicate the number has hallmarks of a disposable or fraudulent line and should be treated with caution — at minimum, by requiring additional verification before granting account access or processing transactions.
Carrier lookups are passive operations — no contact is made with the number's owner, no notification is generated, and no personal information about the user is returned. Our tool returns information about the line, not the person using it. We don't return names, addresses, social profiles, or any personally identifiable information beyond what is publicly registered to the phone number itself.
Lookups are subject to fair use limits to prevent abuse. We expressly prohibit using carrier lookups for stalking, harassment, unauthorized investigation, or any purpose that violates local laws or telecom regulations in your jurisdiction.
Reach for the lookup tool whenever you need to validate a phone number's authenticity. Common scenarios include: before sending an SMS verification code (saves money on undeliverable messages), when reviewing a suspicious account signup, before reaching out to a sales lead (mobile lines convert better than VoIP), or when investigating an unfamiliar incoming call or text.
For one-off lookups, the tool on this page is free and instant — no signup required. For high-volume or programmatic use, our API supports batch lookups, webhook delivery, and dedicated rate limits.
Everything you need to know about phone number carrier identification.