420 Country Code: Czech Republic (+420)
Country code 420 (+420) belongs to Czech Republic. Czech Republic uses the international dialing code +420, assigned by the International Telecommunication Union (ITU) under the E.164 standard. The ISO 3166-1 alpha-2 code is CZ.
You will see the same code written several ways depending on origin: +420 (universal + prefix, works from mobile), 00420 (from countries that use 00 as their international exit code — most of Europe, Asia, and Latin America), 011 420 (from the US and Canada), 0011 420 (from Australia), or the bare 420. All refer to the same Czech Republic country code. Note: 420 is not a US area code — US area codes are also 3 digits but +420 is the international dialing code for Czech Republic, not a domestic US destination.
Below you will find the number format, trunk prefix, major city area codes, and dialing facts specific to Czech Republic (+420).
Call from your browser — no app, no subscription
$0.44/min to Czech Republic|No install required. Use it in under 2 minutes.
Did You Get a Call from +420? Here's What That Means
Any incoming call that displays +420 followed by more digits is originating from Czech Republic. The caller is dialing you from a Czech Republic-registered phone number — either a landline or a mobile on a Czech Republic carrier.
Common reasons people receive calls from +420:
- -Family or friends in Czech Republic calling from a local number
- -Business contacts at Czech Republic-based companies
- -Customer support agents working from a Czech Republic call center
- -Travel-related calls (hotels, airlines, tour operators)
- -Less commonly, robocalls or scam calls that have spoofed a +420 number — if the call is unsolicited, do not return it without verifying the source
To return a call to a +420 number from the US, use Kinvo's Czech Republic dialing guide — calls cost from $0.44/min with no app to download.
Czech Republic Phone Number Format
International Format Example
Czech Republic does not use a trunk prefix, so domestic and international formats are effectively the same — just prepend +420.
Calling Czech Republic Successfully: Common Mistakes & Best Practices
Most failed calls to Czech Republic come from one of four mistakes, not from network problems. The most common is mishandling the country code itself: Czech Republic uses +420 with no trunk prefix to remove, so you dial it as-is. The most frequent error is adding a leading 0 by habit — there is none in the Czech Republic number plan.
The second is misreading the area code on landline numbers — Czech Republic numbers may have variable formatting depending on the carrier and city, so confirm the area code with the recipient before dialing. The third is dialing during off-hours — Czech Republic uses local business hours and consumer phones are usually answered between 8 AM and 9 PM local time. The fourth and most expensive mistake is assuming your US carrier's WiFi calling feature makes the call cheap. It does not — see WiFi calling vs VoIP for international calls for why.
For scam-call awareness: +420 is the legitimate Czech Republic country code, and most unsolicited calls from +420 numbers are legitimate calls from Czech Republic-based businesses, hospitals, family members, or call centers serving US customers. Caller-ID spoofing exists, so if a call from a +420 number claims to be from a US government agency, your bank, or the IRS, hang up and call the agency back on its published number. Real authorities never demand payment over the phone.
When you are ready to place a call, the cheapest reliable route is to dial +420 from your browser using Kinvo — no app, no carrier add-on, and the per-minute rate is shown before you connect so there are no bill surprises. The browser approach also works from any laptop, tablet, or phone you happen to have access to, which matters when you're traveling, using a work device, or borrowing someone else's computer.
Calling Czech Republic from Your Browser
To place a call to Czech Republic, dial +420 followed by the local number in the Kinvo browser dialer. Pay-as-you-go, no app required.
Call Czech Republic from Your Browser
Call any Czech Republic number (+420) directly from Chrome, Firefox, Safari, or Edge. No install required. Use it in under 2 minutes.
Related Country Calling Codes
More Europe Country Codes
Most Searched Country Codes
Frequently Asked Questions: Czech Republic Country Code
Which country is country code 420?
Country code 420 belongs to Czech Republic. The full international dialing code is +420, also written as 00420 from countries using 00 as their international exit code (Europe, most of Asia, Latin America), 011 420 from the US and Canada, or +420 from any mobile phone.
What is the country code for Czech Republic?
+420 is the international dialing code for Czech Republic, assigned by the ITU under E.164. The ISO 3166-1 alpha-2 code is CZ. Equivalent forms — 00420, 011 420, +420, and 420 — all refer to the same Czech Republic country code.
Is 420 a US area code?
No. 420 is the international country code for Czech Republic, not a US area code. US area codes are also 3 digits but they are domestic North American Numbering Plan codes — to reach Czech Republic from the US, dial +420 or 011 420 followed by the local number.
Can I call Czech Republic from my browser?
Yes. Kinvo connects calls to Czech Republic via WebRTC directly from Chrome, Firefox, Safari, or Edge. No app download. Sign up, add credits from $5, and dial +420 followed by the local number.