Carrier Lookup: Find a Phone Number’s Carrier and Line Type
Free carrier lookup for US and Canadian phone numbers. Find a number's carrier and line type, then check the numbers on every incoming lead.
A carrier lookup tells you which carrier a phone number belongs to and whether it's a mobile, landline or VoIP line. Enter a US or Canadian number below to look up its carrier and line type for free.
If you're checking phone numbers on incoming leads at volume, GoodInbound Lead Screen is a drop-in fix that runs these checks on every form submission. It screens how every visitor fills in your form and stops automated list bombing, spam, and non-buyers sending unsolicited pitches from cluttering your pipeline, with five layers of protection:
- Rules: domains you always accept or always block.
- Behavior: how the form was filled in: typing, pasting, fill time, automation tells, and a built-in honeypot.
- Network: data centers, VPNs, proxies, Tor, and bursts from one IP or device.
- Identity: whether the email has a working inbox and isn't disposable or gibberish, and whether the phone number is real.
- Message: the whole submission read for intent, so sales pitches, recruiters, and link offers are caught.
Every submission is classified into five types (lead, review, spam, junk, and bot), and only the real leads, based on your filters, are sent to your CRM. GoodInbound takes care of the entire flow end to end for you.
Use GoodInbound for free for up to 500 screened submissions a month.
How to look up a phone number's carrier
- Enter the number above, including
+1and its area code. - Select Look up carrier.
- Read the returned carrier, line type and country.
GoodInbound checks the number before it looks up the carrier: invalid numbers and known fake patterns get a correction message, and the tool never shows a guessed carrier.
Original carrier versus current carrier
A phone number can move between providers without changing its digits, so the carrier it was first assigned to may not be the one serving it today. GoodInbound returns the current carrier from records that account for number porting.
| Result | What it describes |
|---|---|
| Original carrier | The carrier the number was first allocated to |
| Current carrier | The carrier serving the number now, after any porting |
Successful lookups are cached for 30 days, so checking the same number again returns instantly.
Why the carrier name can look unfamiliar
The carrier is often the network provider behind the brand that sold the phone service. A business that buys phone service from a reseller or a cloud phone platform runs on another carrier's network, and the lookup shows that network.
What mobile, landline and VoIP results mean
The line type tells you what kind of service the number is on:
- Mobile: a cell phone number.
- Landline: a fixed-line number.
- VoIP: internet-based telephony, common for business phone systems and cloud phone apps.
VoIP doesn't mean fake: plenty of businesses run on VoIP phone systems. GoodInbound weighs line type alongside the rest of the submission, so a real business on a VoIP line still gets through while a throwaway number in a spam submission doesn't.
Use carrier lookup in your application
GoodInbound's phone lookup and validation API brings the same checks into your own forms and workflows. It returns validity, fake-pattern flags, country and line type for numbers worldwide, plus carrier information for US and Canadian numbers, with carrier results cached for 30 days.
Use the lookup above for a single US or Canadian number, and our phone number validator for format and fake-pattern checks in other countries. To see how this compares with paying per request, read our Twilio Lookup API pricing breakdown.
Frequently asked questions
Can I find a carrier from the area code?
No. Number portability lets a number move between providers while keeping its area code, so only a carrier lookup shows the current carrier.
Why does the result differ from the provider I recognize?
The lookup shows the network behind the service, which can differ from the reseller or cloud phone brand you signed up with.
Does carrier lookup work internationally?
This tool looks up US and Canadian carriers. For other countries, our phone number validator checks the number against its country's numbering plan.
Can I look up carriers in bulk?
Yes. Use the GoodInbound phone checks API to check numbers from your application. The tool on this page checks one number at a time.
Can I find out who owns a phone number?
A carrier lookup returns the network and line type. To research the person behind a number, send it to GoodInbound's enrichment API, which accepts a phone number as input.
