Norway • NPA 239
☎️ Central Office Exchange (NXX)
+47 (239) 428 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +47 (239) 428. Central office block assigned to Oslo, Norway.
Standard Subscriber Format
+47 (239) 428-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
239
Primary Location
Oslo
Service Type
Landline
📋 Central Office Exchange 428 Routing Details
The 428 exchange code (central office prefix) operates within the 239 Numbering Plan Area (NPA) servicing Oslo, Norway. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +47 (239) 428 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
0239 428-1234or local national format. -
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International Calls: Dial
+47 239 428-1234from outside Norway. -
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E.164 Standard:
+47239428XXXX
📞 Nearby Exchanges in Area Code 239
View All Area Code 239 Exchanges ›❓ Frequently Asked Questions
What area code is +47 (239) 428?
Phone numbers starting with +47 (239) 428 belong to the 239 area code in Oslo, Norway, routed via exchange block 428.
How do I call a 428 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +47, then 239, and the subscriber number.
Which provider operates the 428 prefix in Oslo?
Telecom services for the 428 exchange block in Oslo are primarily assigned to Local Network Carrier for Landline connections.