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Toll-free number lookup

Check whether a prefix is genuinely toll-free, when it entered service, and what a call from it means, including the prefixes that look toll-free but are not assigned to anyone.

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Reviewed by Sujan ThapaliyaLast updated August 18, 2026

800Toll-free, in service since 1966The original toll-free code, and the only one most people recognise on sight.
833Toll-free, in service since 2017The newest widely available toll-free code, which is why so many 833 calls are unfamiliar.
844Toll-free, in service since 2013844 is fully toll-free and functionally identical to 800.
855Toll-free, in service since 2010855 is toll-free.
866Toll-free, in service since 2000866 is toll-free across the US, Canada, and the Caribbean NANP territories.
877Toll-free, in service since 1998877 is toll-free and long established, old enough that most consumers recognise it as legitimate..
888Toll-free, in service since 1996888 was the first expansion beyond 800 and remains the second most recognised toll-free prefix..
822Not assigned; a call showing this is spoofed822 is reserved for future toll-free use but is not yet in general service.
900Non-geographic, not an ordinary phone number900 is the premium-rate range: the *caller* pays, sometimes heavily.
710Non-geographic, not an ordinary phone number710 is reserved for US Government use.
600Non-geographic, not an ordinary phone number600 is a Canadian non-geographic code used for services such as satellite and machine-to-machine lines, not for ordinary phones..
456Non-geographic, not an ordinary phone number456 carries inbound international calls handed off between carriers.

Which prefixes are toll-free in North America?

Seven: 800, 833, 844, 855, 866, 877, and 888. All are functionally identical: the business receiving the call pays, and the caller does not. They are not area codes and carry no geographic meaning. 822 is reserved for future toll-free use but is not yet in general service, so a call displaying it today is almost certainly spoofed.

How a toll-free code occupies the national destination code position of a North American number under E.164: country code 1, then the toll-free code such as 800 or 888, then the seven remaining digits. Unlike a geographic area code the toll-free code encodes no location at all. — Every tool here reads and writes the same structure: country code, national destination code, subscriber number.

Step by step

How to use the toll-free lookup

1
Enter the prefix
Type a three-digit prefix to check whether it is a toll-free code in the North American Numbering Plan, or one of the ranges that merely looks like one.
2
Check who pays
On a genuine toll-free code the called party pays for the call, which is exactly why the format is imitated by scam callers. The result tells you which codes are real.
3
Verify before you trust it
A toll-free number displayed on caller ID proves nothing about who is calling. If a call claims to be your bank, hang up and dial the number printed on your card instead.

How it works

Why there are seven toll-free codes

800 arrived in 1966 and was the only toll-free code for thirty years. When it filled up, 888 was added in 1996, then 877 in 1998, 866 in 2000, 855 in 2010, 844 in 2013, and 833 in 2017. Each addition happened because the previous code had run out of available numbers.

That history explains two things people notice. First, why unfamiliar codes feel suspicious: 833 has existed for a fraction of the time 800 has, so consumers have simply seen fewer legitimate ones. Second, why vanity numbers are still obtainable: nearly every memorable combination in 800 was claimed decades ago, but the newer codes still have room.

Toll-free numbers are portable and administered through a shared national database, so a business keeps its number when it changes provider. That is also why the number on an old invoice usually still works.

Frequently asked questions

Is 833 a real toll-free number?

Yes. 833 is a legitimate toll-free code that entered service in 2017 and works exactly like 800: the business receiving the call pays. It is unfamiliar to many people simply because it is recent, which is also why scam callers like using it.

Is 844 toll-free?

Yes. 844 entered service in 2013 and is functionally identical to 800, 833, 855, 866, 877, and 888. All seven are toll-free codes in the North American Numbering Plan.

How do I find out who owns a toll-free number?

There is no public directory of toll-free subscribers. The practical options are: search the full number online, since businesses publish theirs; check whether it appears on a bill or statement you already hold; or simply not call back. If someone claiming to be your bank left an 833 number, call the number printed on your card instead.

Are toll-free calls free from a mobile?

Within the US and Canada, yes: the called party pays. Calling a North American toll-free number from outside the region is usually not free, and frequently will not connect at all.

Should I trust a call from a toll-free number?

Treat it exactly like any unknown call. A toll-free number looks official, which is precisely why it is imitated. Never give card details, passwords, or verification codes to someone who called you; hang up and call the organisation back on a number you obtained yourself.

Sources

ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.
ITU-T International Numbering Resources — International Telecommunication UnionThe assignment of country calling codes and the published national numbering plans they belong to.

Get a toll-free number that spells something

The good 800 combinations went decades ago, but 833, 844, and 855 still have room. Claim one, put your business name on the caller ID, and route it wherever you like.

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