China • NPA 357
☎️ Central Office Exchange (NXX)
+86 (357) 421 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (357) 421. Central office block assigned to Linfen, Shanxi, China.
Standard Subscriber Format
+86 (357) 421-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
357
Primary Location
Linfen, Shanxi
Service Type
Landline
📋 Central Office Exchange 421 Routing Details
The 421 exchange code (central office prefix) operates within the 357 Numbering Plan Area (NPA) servicing Linfen, Shanxi, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (357) 421 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
0357 421-1234or local national format. -
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International Calls: Dial
+86 357 421-1234from outside China. -
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E.164 Standard:
+86357421XXXX
📞 Nearby Exchanges in Area Code 357
View All Area Code 357 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (357) 421?
Phone numbers starting with +86 (357) 421 belong to the 357 area code in Linfen, Shanxi, China, routed via exchange block 421.
How do I call a 421 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 357, and the subscriber number.
Which provider operates the 421 prefix in Linfen, Shanxi?
Telecom services for the 421 exchange block in Linfen, Shanxi are primarily assigned to Local Network Carrier for Landline connections.