What is a reverse phone lookup?
Last updated November 14, 2026
A reverse phone lookup starts with a phone number and tells you what is known about it, instead of starting with a name. Ms. Number is an iPhone app that does this for US numbers, showing community reports and the carrier.
Get Ms. Number on the App StoreWhat a lookup can return
Different services return different things. On Ms. Number you can see:
Reports from other people, tagged scam, robocall, debt collector, telemarketer, political, harassment, spoofed or safe.
Line type (mobile, landline, VoIP or toll-free) and carrier.
A severity score from safe up to fraud.
People-search sites such as Spokeo and Whitepages also list reverse phone lookup next to name and address search.
What it cannot do
A lookup cannot read a hidden or blocked caller ID, because there is no number to search. It also cannot prove a caller is who the screen says: numbers can be spoofed, so a clean result is not a guarantee.
Where the reports come from
On Ms. Number, community reports come from users. Its llms.txt calls them unverified user opinions, not statements of fact.
Questions
Is a reverse lookup the same as a background check?
No. Ms. Number says it is not a consumer reporting agency and its results cannot be used for hiring, housing, credit or insurance decisions.
Are lookups free?
Some services have free previews. Ms. Number's iPhone app requires a paid plan, per its App Store listing.
Does it work outside the US?
Ms. Number's About page lists US phone numbers.
Check a number in Ms. Number
Look up a number, read what the community reported, and block it in one tap. Ms. Number needs a paid plan to use, and the App Store shows the price and any free trial before you subscribe.
Get Ms. Number on the App StoreSources
Who makes this
Ms. Number is made by Block Browser INC. Community reports are users' opinions and may be wrong. Ms. Number is not a consumer reporting agency, and its information may not be used for credit, employment, housing, tenancy or insurance decisions. To remove a number, use the opt-out page. Questions: support.