Germany • NPA 2421
☎️ Central Office Exchange (NXX)
+49 (2421) 604 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +49 (2421) 604. Central office block assigned to Düren, Germany.
Standard Subscriber Format
+49 (2421) 604-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
2421
Primary Location
Düren
Service Type
Landline
📋 Central Office Exchange 604 Routing Details
The 604 exchange code (central office prefix) operates within the 2421 Numbering Plan Area (NPA) servicing Düren, Germany. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +49 (2421) 604 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
02421 604-1234or local national format. -
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International Calls: Dial
+49 2421 604-1234from outside Germany. -
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E.164 Standard:
+492421604XXXX
📞 Nearby Exchanges in Area Code 2421
View All Area Code 2421 Exchanges ›❓ Frequently Asked Questions
What area code is +49 (2421) 604?
Phone numbers starting with +49 (2421) 604 belong to the 2421 area code in Düren, Germany, routed via exchange block 604.
How do I call a 604 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +49, then 2421, and the subscriber number.
Which provider operates the 604 prefix in Düren?
Telecom services for the 604 exchange block in Düren are primarily assigned to Local Network Carrier for Landline connections.