+423 is the country code for Liechtenstein.
Every phone number in Liechtenstein starts with +423 when you call it from another country. From the US, dial 011 423, then the full number.
- Time there
- Vaduz timeCentral European Time, UTC+1 to UTC+2
- From the US or Canada
- 011 423 660 234 567
- From the UK and most of Europe
- 00 423 660 234 567
- From Australia
- 0011 423 660 234 567
- From any mobile phone
- +423 660 234 567
- Inside Liechtenstein
- 660 234 567
- Mobile numbers
- 7 to 9 digits after +423, starting 64, 65, 66, 73, 74, 77, 78 or 79
- Toll-free numbers
- Start with 800 or 809
Check a +423 number to see whether it is a mobile, a landline or VoIP.
Pick the country, enter the number without the +423, and the free check shows whether it is valid and whether it is a mobile, a landline or VoIP.
Mobile numbers in Liechtenstein start with 64, 65, 66, 73, 74, 77, 78 or 79, and this table shows which networks first issued each start.
| At home | From abroad | First issued by |
|---|---|---|
| 64 | +423 64 | Telecom Liechtenstein |
| 65 | +423 65 | Telecom Liechtenstein, Cubic |
| 66 | +423 66 | Telecom Liechtenstein, Dimoco, FL1 |
| 73 | +423 73 | Telecom Liechtenstein |
| 74 | +423 74 | First Mobile |
| 77 | +423 77 | Swisscom |
| 78 | +423 78 | Salt |
| 79 | +423 79 | Telecom Liechtenstein |
People keep their number when they switch networks, so the start shows where a number began. Our free number portability lookup shows the network it is on today.
In Liechtenstein, the phone number format for apps and SMS gateways is +423 followed by the full number.
| Written | Example | Where you see it |
|---|---|---|
| At home | 660 234 567 | Business cards, local ads |
| International | +423 660 234 567 | Websites, email signatures |
| E.164 | +423660234567 | APIs, SMS gateways, CRMs |
A missed call from a +423 number you don't know can be a one-ring scam, so check it before calling back.
One-ring scams call once and hang up, hoping you call back a line that bills you international or premium rates.
- Don't call back an international number you don't know. A real caller leaves a message or sends a text.
- Check the number in the box above. A number that is not a working mobile or landline in Liechtenstein is a warning sign.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report it at reportfraud.ftc.gov, and see the FCC's guide to one-ring scams.
The codes next to +423 belong to other countries, so one wrong digit reaches a different place.
These are the questions people ask most about +423.
Which country uses the +423 country code?
Liechtenstein. Every phone number there starts with +423 when it is dialed from abroad.
How do I call Liechtenstein from the US?
Dial 011, then 423, then the full number. A mobile number written 660 234 567 at home is dialed 011 423 660 234 567 from the US, or +423 660 234 567 from any mobile phone.
Is +423 the same as 00423?
Yes. 00 is the exit code used in Liechtenstein and most of the world, and the + on a mobile phone stands in for whatever exit code your network uses. From the US and Canada the exit code is 011 instead.
How many digits is a phone number in Liechtenstein?
A mobile number has 7 to 9 digits after +423, written 660 234 567 at home.
What time is it in Liechtenstein?
Liechtenstein is on Central European Time, UTC+1 in winter and UTC+2 in summer.
How do I check a +423 number that called me?
Enter it in the box above. The free check shows whether it is a valid number from Liechtenstein and whether it is a mobile, a landline or a VoIP line, which helps you spot a one-ring scam before you call back.
Sources: Google's libphonenumber numbering data for lengths, mobile starts, area code places, first-issuing networks and time zones, as of September 24, 2026; the ITU list of country codes.