China • NPA 20
☎️ Central Office Exchange (NXX)
+86 (20) 504 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (20) 504. Central office block assigned to Guangzhou, Guangdong, China.
Standard Subscriber Format
+86 (20) 504-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
20
Primary Location
Guangzhou, Guangdong
Service Type
Landline
📋 Central Office Exchange 504 Routing Details
The 504 exchange code (central office prefix) operates within the 20 Numbering Plan Area (NPA) servicing Guangzhou, Guangdong, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (20) 504 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
020 504-1234or local national format. -
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International Calls: Dial
+86 20 504-1234from outside China. -
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E.164 Standard:
+8620504XXXX
📞 Nearby Exchanges in Area Code 20
View All Area Code 20 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (20) 504?
Phone numbers starting with +86 (20) 504 belong to the 20 area code in Guangzhou, Guangdong, China, routed via exchange block 504.
How do I call a 504 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +86, then 20, and the subscriber number.
Which provider operates the 504 prefix in Guangzhou, Guangdong?
Telecom services for the 504 exchange block in Guangzhou, Guangdong are primarily assigned to Local Network Carrier for Landline connections.