Sweden • NPA 521
☎️ Central Office Exchange (NXX)
+46 (521) 231 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +46 (521) 231. Central office block assigned to Vänersborg, Sweden.
Standard Subscriber Format
+46 (521) 231-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
521
Primary Location
Vänersborg
Service Type
Landline
📋 Central Office Exchange 231 Routing Details
The 231 exchange code (central office prefix) operates within the 521 Numbering Plan Area (NPA) servicing Vänersborg, Sweden. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +46 (521) 231 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
0521 231-1234or local national format. -
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International Calls: Dial
+46 521 231-1234from outside Sweden. -
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E.164 Standard:
+46521231XXXX
📞 Nearby Exchanges in Area Code 521
View All Area Code 521 Exchanges ›❓ Frequently Asked Questions
What area code is +46 (521) 231?
Phone numbers starting with +46 (521) 231 belong to the 521 area code in Vänersborg, Sweden, routed via exchange block 231.
How do I call a 231 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +46, then 521, and the subscriber number.
Which provider operates the 231 prefix in Vänersborg?
Telecom services for the 231 exchange block in Vänersborg are primarily assigned to Local Network Carrier for Landline connections.