China • NPA 551
☎️ Central Office Exchange (NXX)
+86 (551) 433 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +86 (551) 433. Central office block assigned to Hefei/Chaohu, Anhui, China.
Standard Subscriber Format
+86 (551) 433-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
551
Primary Location
Hefei/Chaohu, Anhui
Service Type
Landline
📋 Central Office Exchange 433 Routing Details
The 433 exchange code (central office prefix) operates within the 551 Numbering Plan Area (NPA) servicing Hefei/Chaohu, Anhui, China. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +86 (551) 433 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
0551 433-1234or local national format. -
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International Calls: Dial
+86 551 433-1234from outside China. -
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E.164 Standard:
+86551433XXXX
📞 Nearby Exchanges in Area Code 551
View All Area Code 551 Exchanges ›❓ Frequently Asked Questions
What area code is +86 (551) 433?
Phone numbers starting with +86 (551) 433 belong to the 551 area code in Hefei/Chaohu, Anhui, China, routed via exchange block 433.
How do I call a 433 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 551, and the subscriber number.
Which provider operates the 433 prefix in Hefei/Chaohu, Anhui?
Telecom services for the 433 exchange block in Hefei/Chaohu, Anhui are primarily assigned to Local Network Carrier for Landline connections.