Free phone number validator:Check your call list.
See who to call right now.
Paste a list or upload a CSV. Every number is checked, formatted and put in its time zone, then sorted by who you can call now.
- Free, no signup
- Nothing leaves your browser
- Up to 5,000 numbers
No list handy?
Load 50 fictional contacts across every US time zone, Canada and the UK.
Runs in your browser. Nothing you paste or upload is sent or saved.
8 AM to 9 PM their time, the federal rule, or stricter where a state says so. See the rules
Who you can call right now
US calling hours, live. Paste a list to see where your numbers land.
Shaded: calling hours
What this phone number validator checks
Paste a list from your CRM, a spreadsheet column, or a messy note with numbers in it. Phone number validation runs right in your browser: each number is checked against Google's open-source phone number data and the official North American area code list.
Is it a real number?
Valid means the digits fit a real number range for that country: an area code that's in service, an exchange that can exist, the right length. A typo, a missing digit or an area code like 123 gets flagged with the reason.
E.164 and national format
Every number comes back as +12125550142 for your CRM or dialer, and as (212) 555-0142 for people. Extensions are kept apart.
Where it's from, and its time zone
The country, and for North American numbers the state or province of the area code. If an area code spans two time zones, you see both clocks, never a guess.
Whether you can call right now
Each number's local time, live, and a call window: federal calling hours, stricter state rules, or your own hours. The list sorts itself into call now, later today and tomorrow.
Duplicates and dead rows
Repeats of the same number are grouped at the bottom, with the row they repeat. Rows with no dialable number say why.
What is E.164 format?
E.164 is the international standard for writing phone numbers, set by the ITU. It's a plus sign, the country code, then the national number, with no spaces or punctuation, and never more than 15 digits.
It's the format CRMs, dialers and SMS tools store, because it's the one way to write a number that means the same thing from any country. (212) 555-0142 only works if you already know it's American. +12125550142 doesn't need you to.
| Number | National format | E.164 |
|---|---|---|
| New York | (212) 555-0142 | +12125550142 |
| Toronto | (416) 555-0150 | +14165550150 |
| London | 020 7946 0018 | +442079460018 |
Area code time zones
In the US and Canada, the area code is the first clue to a number's time zone. It comes from NANPA, the administrator of the North American Numbering Plan, whose database lists every area code in service and the zones it covers. This tool cross-checks that list against Google's zone data, down to the exchange (the three digits after the area code) where an area code is split.
Two things trip people up. Arizona stays on Mountain Standard Time all year, so in summer it lines up with Pacific time. And the area code is where a number was issued, not where its owner is: a mobile keeps its number when someone moves across the country.
Area codes that span two time zones
Where the exchange tells us the zone, the tool uses it. Where it doesn't, you see both clocks and the call window has to fit both.
| Area code | Where | Time zones |
|---|---|---|
| 208 | Idaho | Mountain and Pacific |
| 605 | South Dakota | Central and Mountain |
| 701 | North Dakota | Central and Mountain |
| 709 | Newfoundland and Labrador | Newfoundland and Atlantic |
| 729 | Tennessee | Eastern and Central |
| 775 | Nevada | Mountain and Pacific |
| 879 | Newfoundland and Labrador | Newfoundland and Atlantic |
| 907 | Alaska | Alaska and Aleutian Islands |
| 986 | Idaho | Mountain and Pacific |
Calling hours across US time zones
The same 8 AM to 9 PM window, as it lands on an Eastern clock. Arizona doesn't change its clocks, so its window moves an hour against everyone else's twice a year.
| Their time zone | In Eastern time, winter | In Eastern time, summer |
|---|---|---|
| Eastern | 8 AM to 9 PM | 8 AM to 9 PM |
| Central | 9 AM to 10 PM | 9 AM to 10 PM |
| Mountain | 10 AM to 11 PM | 10 AM to 11 PM |
| Arizona | 10 AM to 11 PM | 11 AM to midnight |
| Pacific | 11 AM to midnight | 11 AM to midnight |
| Alaska | noon to 1 AM | noon to 1 AM |
| Hawaii | 1 PM to 2 AM | 2 PM to 3 AM |
Calling hours: what time can you legally call?
The federal rule for sales calls to consumers is 8 AM to 9 PM, in the time zone of the person you're calling, not yours. It comes from two places: the FCC's rule under the Telephone Consumer Protection Act (TCPA), which covers residential lines and, since it was extended, mobile numbers, and the FTC's Telemarketing Sales Rule.
Some states set tighter hours or rule out Sundays and holidays. The tool applies them by the number's area code when Stricter state rules is on, to every number in that state, because it can't tell a business line from a personal mobile.
Do calling hours apply to B2B cold calls?
Mostly not, on paper: the FTC's rule exempts most calls to businesses, and the FCC's applies to residential and mobile subscribers. But plenty of B2B buyers answer on a personal mobile, and Canada's hours apply to businesses too. Staying inside these hours costs you nothing that matters, because nobody books a meeting at 9:30 PM.
| Where | Calling hours, their time | Source |
|---|---|---|
| Federal (all states) | Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule. | 47 CFR 64.1200(c)(1); 16 CFR 310.4(c) |
| Alabama | Mon to Sat, 8 AM to 8 PM · Sun, no callsNo calls on legal holidays either, which the tool doesn't track. | Ala. Admin. Code r. 770-X-5-.17(2)(b) |
| Connecticut | Every day, 9 AM to 8 PMCalls to businesses are excluded. | Conn. Gen. Stat. 42-288a(c) |
| Florida | Every day, 8 AM to 8 PMAlso no more than 3 calls in 24 hours on the same subject. | Fla. Stat. 501.616(6) |
| Kentucky | Every day, 10 AM to 9 PMCalls to residences. | KRS 367.46955(16) |
| Louisiana | Mon to Sat, 8 AM to 8 PM · Sun, no callsNo calls on legal holidays either, which the tool doesn't track. | LPSC General Order R-35852 (Mar. 10, 2021), §V(A)(2) |
| Maryland | Every day, 8 AM to 8 PMAlso no more than 3 calls in 24 hours on the same subject. | Md. Code, Com. Law 14-4502(c) |
| Massachusetts | Every day, 8 AM to 8 PM | M.G.L. c. 159C §3 |
| Michigan | Every day, 9 AM to 9 PMIn a harassment statute that needs intent to annoy. | MCL 750.540e(1)(f) |
| Minnesota | Every day, 9 AM to 9 PMCalls to residences. | Minn. Stat. 325E.30 |
| Mississippi | Mon to Sat, 9 AM to 8 PM · Sun, no callsThe law says 8 AM to 8 PM Central Standard Time, which is 9 AM to 9 PM in summer. The tool uses the hours that fit both. | Miss. Code 77-3-723(1) |
| Nevada | Every day, 9 AM to 8 PMCalls to residences. | NRS 598.0918(3) |
| New Mexico | Every day, 9 AM to 9 PM | NMSA 57-12-22(B)(5) |
| Oklahoma | Every day, 8 AM to 8 PMAlso no more than 3 calls in 24 hours on the same subject. | 15 O.S. 775C.4 |
| Oregon | Every day, 8 AM to 8 PMSince Jan. 1, 2026. Also no more than 3 calls in 24 hours. Calls and texts to businesses, and to people you've done business with in the last 18 months, are excluded. | ORS 646.563(1)(b) |
| Pennsylvania | Mon to Sat, 9 AM to 7 PM · Sun, no callsSince Oct. 18, 2026. Covers texts and business lines, for consumer goods and services. No calls on legal holidays either, which the tool doesn't track. | 73 P.S. 2245, as amended by Act 47 of 2026 |
| Rhode Island | Mon to Fri, 9 AM to 6 PM · Sat, 10 AM to 5 PM · Sun, no callsNo calls on legal holidays either, which the tool doesn't track. | R.I. Gen. Laws 5-61-3.6, 5-61-2(2) |
| South Dakota | Mon to Sat, 9 AM to 9 PM · Sun, no callsCalls to residences. | SDCL 37-30A-3(2) |
| Texas | Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PMCalls to residences. | Tex. Bus. & Com. Code 301.051(b)(2) |
| Utah | Mon to Sat, 8 AM to 9 PM · Sun, no callsNo calls on legal holidays either, which the tool doesn't track. | Utah Code 13-25a-103(3) |
| Washington | Every day, 8 AM to 8 PMCalls to businesses are excluded. | RCW 80.36.390(8) |
| Wyoming | Every day, 8 AM to 8 PM | Wyo. Stat. 40-12-302(d) |
| Canada | Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PMApplies to calls to businesses too. Some provinces add rules the tool doesn't apply, like British Columbia's ban on calls on statutory holidays. | CRTC Unsolicited Telecommunications Rules, Part III, s. 23 |
Checked against each source on November 10, 2026. This is a summary to plan your day, not legal advice: laws change and have exceptions, so read the source, and ask counsel before you rely on it. States not listed follow the federal hours.
The best time to cold call, by time zone
Calling hours tell you when you may call. Sales data suggests when people pick up. Treat the second as a tendency, not a rule: the studies are vendor data, and they don't agree on everything.
Start East, finish West
From the East Coast, your first hour reaches only Eastern and Central buyers: Pacific is still before 8 AM. By mid-afternoon your Eastern list is wrapping up while the West Coast is mid-morning. Sort by time zone and the day lines itself up.
Late morning and mid-afternoon, their time
Cognism's 2026 report, from over 200,000 calls, found 10 to 11 AM the strongest hour and 2 to 3 PM the next, with weak results before 9 AM, over lunch and after 4 PM. Gong's analysis of its recorded calls also points to the morning.
Mid-week beats Monday and Friday
Thursday tops Cognism's 2026 ranking, and the older MIT and InsideSales lead response study found Wednesday and Thursday best. The best single day moves year to year; the weak Monday and Friday don't.
- More on timing your callsHow RegieGO's dialer works through a list
What a phone number validator can't tell you
Any free tool that claims these from the number alone is guessing. Here's what this one won't pretend to know.
Mobile or landline, in the US and Canada
North American numbers move between mobile and landline carriers and keep their area code, so the digits can't tell you which it is. Only a live carrier lookup can, and that costs money per number. Outside North America, mobile numbers often have their own prefixes, and the tool labels those.
Whether the line is in service
A valid number can be disconnected. Checking that takes a network lookup or a call.
Where the person is right now
The time zone is the area code's, not the person's. Someone with a 212 number might live in Denver. When it matters, ask.
Whether you're allowed to call
Calling hours are one rule of many. Do Not Call lists, consent for mobile numbers, and state registration rules aren't in a phone number. The calling hours here are a guide, not legal advice.
Phone number validator FAQ
Is this phone number validator free?
Yes. No signup, no limit on how often you use it, up to 5,000 numbers a list. It runs in your browser, so it costs us nothing to run and you nothing to use.
Does my call list get uploaded anywhere?
No. Checking, sorting and the CSV export all happen in your browser. Nothing you paste or upload is sent to a server, saved, or put in a link.
How do I validate a phone number list for free?
Paste the numbers, or upload a CSV, into the tool at the top of this page. To validate phone numbers it checks each one against its country's real number ranges, formats it in E.164, and flags the ones that can't be dialed with the reason, up to 5,000 at a time.
What time can telemarketers legally call?
Federal rules allow sales calls to consumers from 8 AM to 9 PM in the time zone of the person being called. 21 states set stricter hours, and some rule out Sundays or holidays. The calling hours section above lists each one with its source. It's a guide, not legal advice.
Can it tell if a number is a cell phone or a landline?
Not for US and Canadian numbers, and no free offline tool honestly can. Numbers move between mobile and landline carriers and keep their area code. A paid carrier lookup can tell you. For many other countries, mobile numbers have their own prefixes, and the tool labels those.
Can it tell if a number is disconnected?
No. Valid means the number fits a real number range. Whether it's in service takes a network lookup or a call.
What does E.164 format look like?
A plus sign, the country code and the number, with nothing else: +12125550142 for a New York number, +442079460018 for a London one. Never more than 15 digits. The download gives you every valid number in E.164.
What about area codes that cover two time zones?
Where the exchange (the three digits after the area code) tells us the zone, the tool uses it. Where it doesn't, you see both local times, and the number only shows as callable when it's inside calling hours on both clocks.
Why does a number show the wrong state?
Because the area code is where the number was issued, not where the person is. Mobile numbers stay with people when they move. The tool can only tell you the area code's state.
How do I get a cleaned list back into my CRM?
Download the CSV. It keeps your columns in their original order and adds the E.164 number, the time zone, the status and the reason any number failed. Map the E.164 column to your CRM's phone field.
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