Finland • NPA 28
☎️ Central Office Exchange (NXX)
+358 (28) 423 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +358 (28) 423. Central office block assigned to Turku/Pori, Finland.
Standard Subscriber Format
+358 (28) 423-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
28
Primary Location
Turku/Pori
Service Type
Landline
📋 Central Office Exchange 423 Routing Details
The 423 exchange code (central office prefix) operates within the 28 Numbering Plan Area (NPA) servicing Turku/Pori, Finland. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +358 (28) 423 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
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•
Domestic Calls: Dial
028 423-1234or local national format. -
•
International Calls: Dial
+358 28 423-1234from outside Finland. -
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E.164 Standard:
+35828423XXXX
📞 Nearby Exchanges in Area Code 28
View All Area Code 28 Exchanges ›❓ Frequently Asked Questions
What area code is +358 (28) 423?
Phone numbers starting with +358 (28) 423 belong to the 28 area code in Turku/Pori, Finland, routed via exchange block 423.
How do I call a 423 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +358, then 28, and the subscriber number.
Which provider operates the 423 prefix in Turku/Pori?
Telecom services for the 423 exchange block in Turku/Pori are primarily assigned to Local Network Carrier for Landline connections.