Mexico • NPA 657
☎️ Central Office Exchange (NXX)
+52 (657) 320 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +52 (657) 320. Central office block assigned to Chihuahua, Mexico.
Standard Subscriber Format
+52 (657) 320-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
657
Primary Location
Chihuahua
Service Type
Landline
📋 Central Office Exchange 320 Routing Details
The 320 exchange code (central office prefix) operates within the 657 Numbering Plan Area (NPA) servicing Chihuahua, Mexico. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +52 (657) 320 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
0657 320-1234or local national format. -
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International Calls: Dial
+52 657 320-1234from outside Mexico. -
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E.164 Standard:
+52657320XXXX
📞 Nearby Exchanges in Area Code 657
View All Area Code 657 Exchanges ›❓ Frequently Asked Questions
What area code is +52 (657) 320?
Phone numbers starting with +52 (657) 320 belong to the 657 area code in Chihuahua, Mexico, routed via exchange block 320.
How do I call a 320 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +52, then 657, and the subscriber number.
Which provider operates the 320 prefix in Chihuahua?
Telecom services for the 320 exchange block in Chihuahua are primarily assigned to Local Network Carrier for Landline connections.