免費電話號碼 Checker Tool
Paste any phone number and instantly see its country, format and line-type hint — with a clear upgrade path for the fields (carrier, spam score, active-line status) that come from the paid Lookup API.
Free checks run 在您的裝置上 — format, country and line-type hints. For live active-line status and spam scores, use MCM's Lookup API.
What the checker tells you about a number
Carrier / operator
The network the number belongs to — API.
線型
Mobile, landline, VoIP, or toll-free — hints in the free tool, precise via API.
Location
Country, region, and area code — free in the widget above.
Spam / risk score
Whether the number has been reported for spam or fraud — API.
Validity
Correctly formatted and matches its country's numbering plan — free.
Number type
Personal, business, or virtual/VoIP (often linked to scams) — API.
How to check a number in 3 steps
Enter or paste the number
Type a single number, including its country code.
Check
The widget runs the format check on-device in a fraction of a second.
Upgrade for risk
For spam score, live carrier and active-line status, plug into MCM's Lookup API.
Why check a phone number
Avoid scams and fraud
Spot flagged or high-risk numbers before engaging (via the API tier).
清理你的清單
Remove badly-formatted or invalid numbers before a campaign.
Verify legitimacy
Confirm a contact is a real, well-formed number, not a throwaway.
Save time
Rule out format-only errors before you invest in outreach.
它是如何運作的
The checker analyzes each number against national numbering-plan rules in your browser — country, format, line-type hints. For live spam and carrier data, the paid API cross-references live telecom databases and community spam reports, so a recently ported or deactivated number is reported accurately rather than from a stale record.
Free checks run entirely on your device. The Lookup API tier adds live active-line status, spam score, and carrier — and can process thousands of numbers per call.
誰使用它
Sales & marketing
Validate lead lists before outreach.
Support
Confirm a caller's number is genuine.
Fraud teams
Flag risky VoIP or reported numbers (needs API for the risk score).
Anyone
Check an unknown number before calling back.
Accuracy & good-to-know
Phone number checker — frequently asked questions.
Is the phone number checker free?expand_more
Yes — single format checks are free with no signup. Bulk verification and live carrier data are on MCM's plans.
Can I check a whole list of numbers at once?expand_more
The web tool handles single numbers. For bulk verification, upload lists via the Lookup API.
What is a spam score?expand_more
A risk rating based on how often a number has been reported for spam or fraud, helping you decide whether to trust it — via the paid Lookup API.
Does it work for international numbers?expand_more
Yes. Enter the full number with its country code to check numbers worldwide.
Is my data kept private?expand_more
Yes. Free checks run in your browser — nothing you type is logged. Complies with GDPR and CCPA.