Line type check
Is this number mobile or landline?
Get the line type for a number: mobile, landline, VoIP, toll-free or another type. VoIP numbers are flagged because texting them is unreliable.
Verdicts describe reachability. They are not compliance checks.
What you get
What you get back
Every field below is in the API response, with the type to expect.
| Field | Type | What it means |
|---|---|---|
valid | boolean | Whether the number can be a real one. This is a format and numbering check, not proof that anyone answers. |
line_type | string | null | The kind of line: mobile, fixed_line, voip, toll_free and the other types a carrier reports. null when unknown. |
voip | boolean | true for an internet (VoIP) number. Texting one is unreliable. |
verdict | string | The short answer for the row: textable, callable, invalid or unknown. |
reason | string | Why the verdict is what it is, such as mobile, bad_format or outside_coverage. |
Verdicts
A verdict for every row
Read the verdict first. The reason field says how we got there.
| Verdict | What it means | What to do with the row |
|---|---|---|
| Valid · Mobile | A mobile number. It can be called and texted. | Keep it. Whether you may text it depends on consent, and this check does not look at consent. |
| Valid · Landline | A line that can be called: a landline, a toll-free number, VoIP or another type. A VoIP number is flagged because texting it is unreliable. | Call it. Do not count on texts, and send VoIP rows to your call list. |
| Invalid | Not a working number. It is not a real phone number, or no carrier holds its exchange. | Drop the row. If the number looks like a typo, fix it and check it again. |
| Unknown | We could not tell what the number is. You are not charged. | Set the row aside and check it again later if it matters. |
Verdicts describe reachability. They are not compliance checks.
How it works
How it works
Four steps, and none of them needs a call with us.
- Step 1
Enter what you want to check
Type a phone number or an IP address in the box at the top of this page. Numbers can be written in any common format.
- Step 2
Pass a quick check
A short Cloudflare check confirms you're a person. It keeps the free tool free and needs no account.
- Step 3
Read the result
A phone number returns whether it is valid, the line type, the carrier, the region and a verdict. An address returns its country, its network and a risk level.
- Step 4
Go further
A free account starts with free credits and no card. Use them on single checks, whole lists or the API.
Limits
What this check cannot tell you
Knowing where a check stops is what lets you trust the part that works.
- Live data covers numbers in the United States and Canada. A valid number anywhere else gets a format check, the verdict unknown and no charge.
- Carrier answers are cached, so a number that changed carrier very recently may still show the old one.
- We do not say who owns a number. A carrier is a company, not a person, and we do not look people up.
- A number that was real once and is now out of service can still come back callable. A carrier lookup shows what kind of line a number is, not whether anyone picks up.
- Some numbers could be either a landline or a mobile, and the data does not say which. Those come back callable with the reason line_type_ambiguous.
FAQ
Questions about this check
Short answers. If yours is not here, write to support@numberlookup.io.
Why is a VoIP number flagged?
A VoIP number runs over the internet. It can take calls, but texting it is unreliable. So a VoIP number comes back callable, never textable, with voip set to true.
Does textable mean I am allowed to text the number?
No. Textable means the number is a mobile line that can receive a text. Whether you may text it depends on consent and on the Do Not Call rules that apply to you. We do not check either, so keep doing that yourself. If you are unsure, ask a lawyer.
What does each verdict mean?
Textable is a mobile number, which can be called and texted. Callable is a line that can take calls, such as a landline, a toll-free number or a VoIP number. Invalid is not a working number. Unknown means we could not tell, and you are not charged. A verdict says whether a number can be reached. It says nothing about whether you may contact it.
What am I charged when a result is unknown?
Nothing. A result of unknown costs 0 credits. So does input that is not a phone number at all, an empty row and any error. In a bulk list, duplicate rows are free, and rows that come back unknown are returned to your balance when the list finishes.