Ireland • NPA 21
☎️ Central Office Exchange (NXX)
+353 (21) 304 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +353 (21) 304. Central office block assigned to Cork, Ireland.
Standard Subscriber Format
+353 (21) 304-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
21
Primary Location
Cork
Service Type
Landline
📋 Central Office Exchange 304 Routing Details
The 304 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) 304 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
021 304-1234or local national format. -
•
International Calls: Dial
+353 21 304-1234from outside Ireland. -
•
E.164 Standard:
+35321304XXXX
📞 Nearby Exchanges in Area Code 21
View All Area Code 21 Exchanges ›❓ Frequently Asked Questions
What area code is +353 (21) 304?
Phone numbers starting with +353 (21) 304 belong to the 21 area code in Cork, Ireland, routed via exchange block 304.
How do I call a 304 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 304 prefix in Cork?
Telecom services for the 304 exchange block in Cork are primarily assigned to Local Network Carrier for Landline connections.