Ireland • NPA 21
☎️ Central Office Exchange (NXX)
+353 (21) 670 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +353 (21) 670. Central office block assigned to Cork, Ireland.
Standard Subscriber Format
+353 (21) 670-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
21
Primary Location
Cork
Service Type
Landline
📋 Central Office Exchange 670 Routing Details
The 670 exchange code (central office prefix) operates within the 21 Numbering Plan Area (NPA) servicing Cork, Ireland. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +353 (21) 670 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
021 670-1234or local national format. -
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International Calls: Dial
+353 21 670-1234from outside Ireland. -
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E.164 Standard:
+35321670XXXX
📞 Nearby Exchanges in Area Code 21
View All Area Code 21 Exchanges ›❓ Frequently Asked Questions
What area code is +353 (21) 670?
Phone numbers starting with +353 (21) 670 belong to the 21 area code in Cork, Ireland, routed via exchange block 670.
How do I call a 670 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +353, then 21, and the subscriber number.
Which provider operates the 670 prefix in Cork?
Telecom services for the 670 exchange block in Cork are primarily assigned to Local Network Carrier for Landline connections.