023 area code — Haarlem
023 is the local dialing code used in Haarlem, Netherlands. Numbers are written internationally as +31 23.
How to call Haarlem
- From abroad
- +31 23 XXX XXXX
- Within Netherlands
- 023 XXX XXXX
- Country calling code
- +31
About the 023 area code
A full number here takes the form +31 23 XXX XXXX — the 23 identifies Haarlem within Netherlands's numbering plan.
Area codes like 023 tie a phone number to a place — useful for knowing where a call or message originates, and for signing up to services that expect a local Netherlands number. To actually receive an SMS on a Netherlands number, a temporary or virtual line does the job without exposing your own SIM.
Frequently asked questions
What area code is Haarlem?
Haarlem uses the area code 023, written internationally as +31 23.
How do I call Haarlem from another country?
Dial your international access code, then +31 23, then the local number — dropping the national leading 0.
What time is it in Haarlem?
Haarlem is in the Europe/Amsterdam time zone; the live clock above shows the current local time.
Is 023 a mobile or a landline code?
023 is a geographic (landline) area code for Haarlem. Mobile numbers in Netherlands use their own separate prefixes.