Italy • NPA 0421
☎️ Central Office Exchange (NXX)
+39 (421) 558 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +39 (421) 558. Central office block assigned to Venice, Italy.
Standard Subscriber Format
+39 (421) 558-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
0421
Primary Location
Venice
Service Type
Landline
📋 Central Office Exchange 558 Routing Details
The 558 exchange code (central office prefix) operates within the 0421 Numbering Plan Area (NPA) servicing Venice, Italy. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +39 (421) 558 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
0421 558-1234or local national format. -
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International Calls: Dial
+39 421 558-1234from outside Italy. -
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E.164 Standard:
+39421558XXXX
📞 Nearby Exchanges in Area Code 0421
View All Area Code 0421 Exchanges ›❓ Frequently Asked Questions
What area code is +39 (421) 558?
Phone numbers starting with +39 (421) 558 belong to the 0421 area code in Venice, Italy, routed via exchange block 558.
How do I call a 558 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +39, then 421, and the subscriber number.
Which provider operates the 558 prefix in Venice?
Telecom services for the 558 exchange block in Venice are primarily assigned to Local Network Carrier for Landline connections.