China • NPA 464
☎️ Central Office Exchange (NXX)
+86 (464) 644 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (464) 644. Central office block assigned to Qitaihe, Heilongjiang, China.
Standard Subscriber Format
+86 (464) 644-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
464
Primary Location
Qitaihe, Heilongjiang
Service Type
Landline
📋 Central Office Exchange 644 Routing Details
The 644 exchange code (central office prefix) operates within the 464 Numbering Plan Area (NPA) servicing Qitaihe, Heilongjiang, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (464) 644 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
0464 644-1234or local national format. -
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International Calls: Dial
+86 464 644-1234from outside China. -
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E.164 Standard:
+86464644XXXX
📞 Nearby Exchanges in Area Code 464
View All Area Code 464 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (464) 644?
Phone numbers starting with +86 (464) 644 belong to the 464 area code in Qitaihe, Heilongjiang, China, routed via exchange block 644.
How do I call a 644 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 464, and the subscriber number.
Which provider operates the 644 prefix in Qitaihe, Heilongjiang?
Telecom services for the 644 exchange block in Qitaihe, Heilongjiang are primarily assigned to Local Network Carrier for Landline connections.