Austria • NPA 18
☎️ Central Office Exchange (NXX)
+43 (18) 291 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +43 (18) 291. Central office block assigned to Vienna, Austria.
Standard Subscriber Format
+43 (18) 291-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
18
Primary Location
Vienna
Service Type
Landline
📋 Central Office Exchange 291 Routing Details
The 291 exchange code (central office prefix) operates within the 18 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 (18) 291 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
018 291-1234or local national format. -
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International Calls: Dial
+43 18 291-1234from outside Austria. -
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E.164 Standard:
+4318291XXXX
📞 Nearby Exchanges in Area Code 18
View All Area Code 18 Exchanges ›❓ Frequently Asked Questions
What area code is +43 (18) 291?
Phone numbers starting with +43 (18) 291 belong to the 18 area code in Vienna, Austria, routed via exchange block 291.
How do I call a 291 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 18, and the subscriber number.
Which provider operates the 291 prefix in Vienna?
Telecom services for the 291 exchange block in Vienna are primarily assigned to Local Network Carrier for Landline connections.