China • NPA 478
☎️ Central Office Exchange (NXX)
+86 (478) 640 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (478) 640. Central office block assigned to Linhe, Inner Mongolia, China.
Standard Subscriber Format
+86 (478) 640-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
478
Primary Location
Linhe, Inner Mongolia
Service Type
Landline
📋 Central Office Exchange 640 Routing Details
The 640 exchange code (central office prefix) operates within the 478 Numbering Plan Area (NPA) servicing Linhe, Inner Mongolia, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (478) 640 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
0478 640-1234or local national format. -
•
International Calls: Dial
+86 478 640-1234from outside China. -
•
E.164 Standard:
+86478640XXXX
📞 Nearby Exchanges in Area Code 478
View All Area Code 478 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (478) 640?
Phone numbers starting with +86 (478) 640 belong to the 478 area code in Linhe, Inner Mongolia, China, routed via exchange block 640.
How do I call a 640 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 478, and the subscriber number.
Which provider operates the 640 prefix in Linhe, Inner Mongolia?
Telecom services for the 640 exchange block in Linhe, Inner Mongolia are primarily assigned to Local Network Carrier for Landline connections.