China • NPA 737
☎️ Central Office Exchange (NXX)
+86 (737) 321 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (737) 321. Central office block assigned to Yiyang, Hunan, China.
Standard Subscriber Format
+86 (737) 321-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
737
Primary Location
Yiyang, Hunan
Service Type
Landline
📋 Central Office Exchange 321 Routing Details
The 321 exchange code (central office prefix) operates within the 737 Numbering Plan Area (NPA) servicing Yiyang, Hunan, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (737) 321 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
0737 321-1234or local national format. -
•
International Calls: Dial
+86 737 321-1234from outside China. -
•
E.164 Standard:
+86737321XXXX
📞 Nearby Exchanges in Area Code 737
View All Area Code 737 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (737) 321?
Phone numbers starting with +86 (737) 321 belong to the 737 area code in Yiyang, Hunan, China, routed via exchange block 321.
How do I call a 321 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 737, and the subscriber number.
Which provider operates the 321 prefix in Yiyang, Hunan?
Telecom services for the 321 exchange block in Yiyang, Hunan are primarily assigned to Local Network Carrier for Landline connections.