Slovakia • NPA 57
☎️ Central Office Exchange (NXX)
+421 (57) 337 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +421 (57) 337. Central office block assigned to Humenne, Slovakia.
Standard Subscriber Format
+421 (57) 337-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
57
Primary Location
Humenne
Service Type
Landline
📋 Central Office Exchange 337 Routing Details
The 337 exchange code (central office prefix) operates within the 57 Numbering Plan Area (NPA) servicing Humenne, Slovakia. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +421 (57) 337 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
057 337-1234or local national format. -
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International Calls: Dial
+421 57 337-1234from outside Slovakia. -
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E.164 Standard:
+42157337XXXX
📞 Nearby Exchanges in Area Code 57
View All Area Code 57 Exchanges ›❓ Frequently Asked Questions
What area code is +421 (57) 337?
Phone numbers starting with +421 (57) 337 belong to the 57 area code in Humenne, Slovakia, routed via exchange block 337.
How do I call a 337 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 57, and the subscriber number.
Which provider operates the 337 prefix in Humenne?
Telecom services for the 337 exchange block in Humenne are primarily assigned to Local Network Carrier for Landline connections.