Guide
Landline or Cell Phone Lookup
How do I check whether a number is a landline or a cell phone?
Short answerLook it up against current carrier records. The number itself cannot tell you: area codes and prefixes record which network a number was first issued to, and since numbers can be ported between wireline, VoIP and wireless providers, a number that started as a landline can be a cell phone today. A live lookup returns the line type as it stands now -- mobile, landline or VoIP -- along with the carrier. NumberBroom's free lookup does one number at a time, five a day; a list of them runs as one upload.
Checking a whole list? Preview 20 rows of it free →
On this page
Most people asking this want one of two things: to know whether a single number they are about to call is a mobile, or to split a list into the numbers they can text and the ones they cannot. Both come down to the same lookup. The difference is only how many numbers go through it.
What a lookup can return
| Line type | What it is | Can it receive a text? |
|---|---|---|
| Mobile | A cell phone on a wireless carrier | Yes, while in service |
| Landline | A fixed line on a wireline carrier | No |
| VoIP | An internet-based number, fixed or non-fixed | Depends on the service |
| Toll-free | A business 8XX line | Not a consumer number |
| Invalid | Not a valid, assigned number | No |
A mobile answer is not the same as a working number. A cell phone that has been disconnected still reports its line type as mobile, which is why the free carrier lookup also reports whether the line looks disconnected, from how recently the number has shown activity. For a single number that is a footnote. On a purchased list, it is often the largest group of rows that were never going to answer.
Why the area code cannot answer it
Numbers are issued to carriers in blocks, so for years the area code and exchange did identify the network. Porting ended that. The FCC's own guide says a number can move between wireline, IP and wireless providers when its owner switches, and when it does, it keeps its original prefix. So a block that belonged to a landline company now contains cell phones, and a free tool that answers from a prefix table is reporting where the number started, not what it is. The only reliable answer comes from the current routing record, which is what a real lookup reads. How to find a phone number's carrier covers the mechanics.
Why the line type matters before you dial
For texting, it decides whether a message can be delivered at all. For calling, it decides which TCPA rule applies. The statute treats a number assigned to a cellular service separately: an autodialed or prerecorded call to one needs the recipient's prior express consent (47 U.S.C. § 227(b)(1)(A)(iii)), and residential landlines are covered by a different clause. A team that dials by hand from a purchased list, and a team that sends texts through a platform, need opposite answers from the same file: the first may want to keep the landlines, the second must remove them.
Line type is one check, not the whole scrub
Knowing a number is a mobile says nothing about whether its owner is a known TCPA litigator, or whether it is on the Do Not Call Registry. NumberBroom checks line type, carrier, activity and litigator status. The free lookup does not check the Do Not Call Registry; a signed-in paid list scrub can add a federal Do Not Call Registry check, under your own FTC subscription (SAN), included free on lists of up to 1,000 numbers.
Checking a whole list
One number at a time stops making sense somewhere past a handful. On the upload page you can drop a CSV, TSV, Excel or PDF file, or paste the numbers, and preview the result on 20 rows free before paying. Every number is looked up against the same carrier data as the free tool, and the file you download keeps each number exactly as you uploaded it, with the line type, carrier and activity score added. Choose the full scrub to keep only mobile numbers, or the litigators-only scrub to keep every line type and remove just the known litigators. It costs $0.20 per number for the first 2,000 rows and less after that, with a $5 minimum and no subscription.
Frequently asked questions
Is this number a cell phone?
Run it through a lookup that checks current carrier data, not a prefix table, and read the line type. Mobile means a cell phone. Landline means a fixed line. VoIP means an internet-based number, which can sit on a desk phone, an app or a softphone. The free carrier lookup answers it for any US number in a few seconds.
Can the area code tell me if a number is a landline?
No. Area codes and exchanges are handed out to carriers in blocks, so the first six digits say which network a number was issued to. The FCC lets subscribers keep their number when they move between wireline, IP and wireless providers, so a block issued to a landline company now holds numbers that are cell phones, and the reverse. A prefix answer is a guess stated with confidence.
Why does it matter whether a number is a cell phone?
Two reasons. The practical one: a landline cannot receive a text, so an SMS campaign sent to one is billed and goes nowhere. The legal one: the TCPA names cell phones specifically. Under 47 U.S.C. § 227(b)(1)(A)(iii), a call made with an autodialer or an artificial or prerecorded voice to a number assigned to a cellular service needs the called party's prior express consent. Residential landlines have their own rule for prerecorded calls, in § 227(b)(1)(B). Knowing the line type is what lets you apply the right one.
Does a lookup tell me who owns the number?
No. A line-type lookup answers questions about the line: which network serves it and what kind of line it is. It does not return the subscriber's name or address, and NumberBroom does not sell that. If you are trying to identify an unknown caller, you want a caller-identification service instead.
How do I check a whole list at once?
Upload the file on the upload page -- CSV, TSV, Excel or PDF -- or paste the numbers straight in. The free preview shows the result for 20 rows before you pay. Every row then comes back with line_type, carrier and activity_score appended. The full scrub keeps only the mobile numbers; the litigators-only scrub keeps landlines and VoIP too and removes just the known TCPA litigators, for teams who dial landlines by hand.