Austria • NPA 17
☎️ Central Office Exchange (NXX)
+43 (17) 309 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +43 (17) 309. Central office block assigned to Vienna, Austria.
Standard Subscriber Format
+43 (17) 309-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
17
Primary Location
Vienna
Service Type
Landline
📋 Central Office Exchange 309 Routing Details
The 309 exchange code (central office prefix) operates within the 17 Numbering Plan Area (NPA) servicing Vienna, Austria. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +43 (17) 309 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
017 309-1234or local national format. -
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International Calls: Dial
+43 17 309-1234from outside Austria. -
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E.164 Standard:
+4317309XXXX
📞 Nearby Exchanges in Area Code 17
View All Area Code 17 Exchanges ›❓ Frequently Asked Questions
What area code is +43 (17) 309?
Phone numbers starting with +43 (17) 309 belong to the 17 area code in Vienna, Austria, routed via exchange block 309.
How do I call a 309 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +43, then 17, and the subscriber number.
Which provider operates the 309 prefix in Vienna?
Telecom services for the 309 exchange block in Vienna are primarily assigned to Local Network Carrier for Landline connections.