- Your call log and a free number lookup tell you what kind of number called and whether people reported it. They do not give you a name.
- Caller ID can be faked, so a name or a local area code that comes back for a number you do not know can belong to someone who never called you.
- A call that shows No Caller ID has no number to look up. You can block it and report it, and a threat belongs with local law enforcement.
- Report a scam to the FTC and an unwanted or spoofed call to the FCC. To know who is calling next time, give each site its own number you can burn.
Call log, lookup, search and private numbers
How do you find out who called you? Check the log, look up the number, and report what you cannot trace.
Check the number and time in your call log, run the number through a free lookup and search it, and you learn what kind of line called and what others report, but not a name, and a private or No Caller ID call leaves nothing to look up. ExpressNumber covers the next call: give each site its own number you can burn, and a call to that number tells you which site passed yours on.
$0 todayEvery outside fact on this page was read on the organization's own page, linked at the foot.
Five checks, in this order
Each check tells you a little more about the call.
- Open the call logThe number, the time and any voicemail.
- Run the number through the lookupLine type, network and risk level.
- Search the numberWhat other people report about it.
- Check the area codeWhere it was issued, not where the caller is.
- Report itTo the FTC or the FCC if it was a scam or unwanted.
A call that shows No Caller ID stops at step 1: there is no number to check.
These are the six ways to find out who called and what each one cannot tell you.
The first row settles the question for the next call. The other five check the call you already got, and none of them promises a name.
| Way to check | What it can tell you | What it cannot tell you | Cost | Minutes |
|---|---|---|---|---|
| A separate number for each site | Which site passed your number on, because each site got a number of its own. | Who called a number you already use. It covers the numbers you hand out from now on. | Free for 7 days, then $9.99 a month | About 5 |
| iPhone: Calls. Android: Home | The number, the time and any voicemail, and whether you missed the call. | A name for anyone who is not in your contacts, and a number for a call that shows No Caller ID. | Free | Under 1 |
| Free, no signup | The line type, the network behind the number and a risk level, from the free lookup. | The name of the caller, or proof that a call is a scam. | Free | Under 1 |
Reports from other people, and a business name when a real company called. | The person behind a faked number: the record can belong to someone innocent. | Free | About 2 | |
Roughly where the number was issued, with the area code lookup. | Where the caller is. Scammers copy your area code to look local. | Free | Under 1 | |
Nothing on your phone. Reports help the FTC and the FCC find illegal callers. | Who called you. A report names no one and blocks no number. | Free | About 3 |
On an iPhone you see which number called from the Phone app's call list.
Open the Phone app, tap the filter button and tap Calls, or Missed for the calls you did not answer. Tap a call for its details, then copy the number into the lookup or a search.
- 1Open the Phone app, tap the filter button, then tap Calls or Missed.
- 2In the Unified layout, tap a call or contact. In the Classic layout, tap the More Information button next to a call.
- 3Go to Settings, Apps, Phone and turn on Unknown Callers under Call Filtering. Missed calls and voicemails from numbers you have not saved move to their own list.
- 4Copy the number and run it through the spam number lookup, then search it.
9:41
Calls
CallsMissedUnknown Callers
(415) 555-0142Missed, 2:14 PM
No Caller IDMissed, 11:02 AM
(212) 555-0166Answered, yesterday
Tap the outlined call for its details
A withheld number leaves nothing to look up
Your phone company may hold more information about deleted calls and older call histories, Apple says.
Sources: Apple Support: View and delete your call history on iPhone · Apple Support: Manage unknown callers on iPhone
On Android the Phone app can search an unknown number for you with one tap on Lookup.
Open the Phone app, tap an unknown number in the Home tab, then tap Lookup at the bottom. That opens your default search engine with the number already in the box, and Google suggests checking the results before you decide whether to return the call.
- 1Open the Phone app. The Home tab lists the calls you missed, answered and made.
- 2Tap an unknown number, then tap Lookup at the bottom.
- 3Keep See caller ID & spam on (More options, Settings, Caller ID and spam). It is on by default, and it shows information about callers outside your contacts.
9:41
Home
(415) 555-0142Missed, 2:14 PMLookup
Private numberMissed, 11:02 AM
(305) 555-0118Answered, yesterday
Tap the outlined number, then Lookup
A withheld number leaves nothing to look up
Some of these steps work only on Android 6.0 and later, Google says.
Sources: Google Phone app Help: Manage call history and do a reverse phone number look up · Google Phone app Help: Use caller ID and spam protection
The free spam number lookup tells you what kind of line called, not who the caller is.
Paste the number into the spam number lookup and it shows the line type (mobile, landline or VoIP, which means internet-based), the network behind the number and a risk level. It cannot name the caller, and it cannot prove a scam: a high risk level means people reported the number or its network signals look like spam, and a low one is no promise.
Caller ID is easy to fake, so a clean result does not clear a call. The FTC says scammers can make any name or number show up on your caller ID, which is called spoofing.
The free spam number lookup
It reads the line, not the person.
It shows
- The line type: mobile, landline or VoIP
- The network behind the number
- A risk level, from spam reports and network signals
It does not show
- A name or an address for the caller
- Proof that a call is a scam
- Who is behind a number that was faked
Free, and it needs no signup.
Sources: FTC: Phone scams
A web search shows what other people report about a number, but a faked number can point to someone innocent.
Search the number with its area code and read what other people report. Treat any name with care: the FCC says caller ID spoofing makes name and address searches of a suspect number unusable, because the record can belong to an innocent third party.
What other people report
Complaints on the number, and the name of the business when a real company is calling. Android opens this search for you.
Google Phone app Help: Manage call history and do a reverse phone number look up
Numbers can be faked
Scammers can make any name or number show up on your caller ID, and a faked number often belongs to a real person who never called you.
Look-alike area codes
Neighbor spoofing is a caller ID number with your area code, often matching the first six digits of your own number.
Paid people search sites
Sites that sell the name behind a number compile reports from public records and from data brokers, the FTC says. A faked number returns the wrong record.
FTC: What to know about people search sites that sell your information
An area code tells you where a number was issued, not where the caller is.
The first three digits point to a region. The area code directory and the area code lookup show which state it is and what time it is there, and neither shows where the caller is standing.
A local number you do not know is a reason to check it, not to trust it. In the FCC complaint data below, most of the caller ID numbers people reported had a local area code, and the ranking by area code shows which ones.
FCC unwanted-call complaints
Most reported caller IDs look local: 82% had a local area code.
- Local codes, tied to a place82% · 44,196 complaints
- Toll-free codes18% · 9,731 complaints
- Special-use or unassigned0.3% · 147 complaints
The six local codes people named most
125,367 complaints, October 2025 to September 2026. FCC open data, read November 4, 2026.
Sources: FCC open data: CGB Consumer Complaints Data · FTC: How to block unwanted calls
A call that shows No Caller ID has no number to look up, so you can block it, log the time and report it.
No Caller ID, Private and Blocked mean the number was withheld. A caller can dial *67 to ask that their number not be passed on, and the FCC rules say a phone company may not override that request, so your phone has no number to show and no lookup can find one.
Sales callers are the exception. The FCC rules say a telemarketer must send its caller ID and may not block it. Tax-exempt nonprofits are the one exception, so a sales call from a hidden number is worth a report.
Tracing a call is work for phone companies and the FCC, not for you: it starts with a complaint and passes from one phone company to the next under a subpoena.
If a call threatens violence or harm, report it to local law enforcement. The FCC rules let a phone company give a blocked caller's number to law enforcement when a threatening call is reported.
- 1Note the date and the time in your call log, and keep any voicemail.
- 2On Android, open the Phone app, tap More, then Settings, then Blocked numbers, and turn on Unknown. That blocks calls from private or unidentified numbers.
- 3On an iPhone, set Screen Unknown Callers to Silence under Settings, Apps, Phone. Calls from numbers you have not saved go to voicemail.
A call that shows No Caller ID
You can act on it, but you cannot unmask it.
You can
- Note the time in your call log
- Block Unknown numbers on Android
- Report it to the FCC and the FTC
- Report a threat to local law enforcement
You cannot
- See the number, because it was withheld
- Look it up or search it
- Trace it yourself
Telemarketers may not block their caller ID, so report a sales call from a hidden number.
Sources: Code of Federal Regulations, 47 CFR 64.1601: Delivery requirements and privacy restrictions · FCC Consumer and Governmental Affairs Bureau: Report on Robocalls (CG Docket No. 17-59, February 2019) · FCC consumer alert: Beware of scammers impersonating FCC commissioners and employees (August 2026) · Google Phone app Help: Block or unblock a phone number · Apple Support: Manage unknown callers on iPhone
Report a scam call to the FTC and an unwanted or faked call to the FCC.
If you lost money or know who called, use ReportFraud.ftc.gov. If you lost nothing, use DoNotCall.gov for a robocall or a sales call. For any unwanted call, including a spoofed one or one that shows No Caller ID, you can also file with the FCC and pick the form Phone and the issue Unwanted Calls/Texts.
Give what you have: the number that received the call, the number on your caller ID even if it looks fake (a No Caller ID call has none), any number you were told to call back, and the date and time with the time zone. Add a recording or a screenshot if you have one.
The FTC says it finds illegal callers by looking for patterns in the reports, and it publishes reported numbers each business day to help companies build call-blocking and call-labeling tools. A report does not tell you who called.
Where each call goes
The kind of call decides where the report goes.
ReportFraud.ftc.govYou lost money, or you know who called.
DoNotCall.govA robocall or a sales call, and no money lost.
The FCC Consumer Help CenterAny unwanted or spoofed call. Pick the form Phone and the issue Unwanted Calls/Texts.
Local law enforcementA call that threatens violence or harm.
Sources: FTC: Robocalls · FTC: Phone scams · FCC consumer alert: Beware of scammers impersonating FCC commissioners and employees (August 2026) · FCC Consumer Help Center: file a complaint · ReportFraud.ftc.gov · DoNotCall.gov
To know who is calling next time, give each site a number you can burn.
Hand each form, listing and sign-up its own ExpressNumber number, named after the place. If the number you gave only to a Marketplace ad starts getting spam, you know where it came from, and you can burn it. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
Numbers are receive-only: they take calls and texts and never make them. Burning a number is permanent, and the number you already use never changed.
The free week is 7 days, then Basic is $9.99 a month with 5 numbers. Read why you get so many spam calls, how to stop spam calls and how to stop spam texts for the rest.
How a separate number works
Each site gets a number of its own, so you know who sold yours.
Give a site its own numberName it after the place, such as Marketplace ad.
Rings
Your phone stays the sameCalls ring the phone you already have, and texts land in your ExpressNumber inbox.
If it leaks
Spam on one name? Burn that numberOne tap, permanent. Your real number never changed.
These are the questions people ask first.
Open your call log, copy the number, run it through the free spam number lookup and search it. That shows what kind of line it is and what other people say about it. It will not show a name for most callers.
Not on your own. A private or No Caller ID call has no number to look up, and the FCC rules say a phone company may not override a caller who asks to withhold it. Note the time, block unknown numbers if you want to, and report the call.
Yes, three: your call log, a free number lookup and a web search. None of them promises a name. Sites that sell the name behind a number compile reports from public records and data brokers, the FTC says.
Look it up first. If the caller said they were your bank or a government agency, look up the organization's real number yourself, because scammers can make any name or number show up on caller ID. On a robocall, do not press a number, the FTC says.
Tracing a call is done from one phone company to the next, under a subpoena, and it starts with a complaint, the FCC says. You cannot run one yourself. If a call threatens violence or harm, report it to local law enforcement.
On Android, open the Phone app, tap More, then Settings, then Blocked numbers, and turn on Unknown. On an iPhone, set Screen Unknown Callers to Silence under Settings, Apps, Phone, which sends calls from numbers you have not saved to voicemail.
Use ReportFraud.ftc.gov if you lost money or know who called, DoNotCall.gov for a robocall or a sales call, and the FCC Consumer Help Center for any unwanted or spoofed call. A threat of violence or harm goes to local law enforcement.
Give each form, listing or sign-up its own ExpressNumber number and name it after the place. Calls ring the phone you already have, and texts land in your ExpressNumber inbox. If one number starts getting spam, you know which site passed it on, and you can burn it.
There are more pages on the same problem.
Every outside fact on this page comes from these sources.
Read November 6, 2026. The complaint counts are the FCC's open data, as read on the date printed beside them.
- FTC: Phone scams
- FTC: Robocalls
- FTC: How to block unwanted calls
- FTC: What to know about people search sites that sell your information
- DoNotCall.gov
- ReportFraud.ftc.gov
- FCC consumer alert: Beware of scammers impersonating FCC commissioners and employees (August 2026)
- FCC Consumer Help Center: file a complaint
- FCC Consumer and Governmental Affairs Bureau: Report on Robocalls (CG Docket No. 17-59, February 2019)
- Code of Federal Regulations, 47 CFR 64.1601: Delivery requirements and privacy restrictions
- Apple Support: View and delete your call history on iPhone
- Apple Support: Manage unknown callers on iPhone
- Google Phone app Help: Manage call history and do a reverse phone number look up
- Google Phone app Help: Use caller ID and spam protection
- Google Phone app Help: Block or unblock a phone number
- FCC open data: CGB Consumer Complaints Data
Give every site a number you can burn.
Hand out a number you can burn. Keep the one your family calls.
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