Slovakia • NPA 31
☎️ Central Office Exchange (NXX)
+421 (31) 331 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +421 (31) 331. Central office block assigned to Dunajska Streda, Slovakia.
Standard Subscriber Format
+421 (31) 331-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
31
Primary Location
Dunajska Streda
Service Type
Landline
📋 Central Office Exchange 331 Routing Details
The 331 exchange code (central office prefix) operates within the 31 Numbering Plan Area (NPA) servicing Dunajska Streda, Slovakia. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +421 (31) 331 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
031 331-1234or local national format. -
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International Calls: Dial
+421 31 331-1234from outside Slovakia. -
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E.164 Standard:
+42131331XXXX
📞 Nearby Exchanges in Area Code 31
View All Area Code 31 Exchanges ›❓ Frequently Asked Questions
What area code is +421 (31) 331?
Phone numbers starting with +421 (31) 331 belong to the 31 area code in Dunajska Streda, Slovakia, routed via exchange block 331.
How do I call a 331 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +421, then 31, and the subscriber number.
Which provider operates the 331 prefix in Dunajska Streda?
Telecom services for the 331 exchange block in Dunajska Streda are primarily assigned to Local Network Carrier for Landline connections.