Mexico • NPA 677
☎️ Central Office Exchange (NXX)
+52 (677) 820 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +52 (677) 820. Central office block assigned to Durango, Mexico.
Standard Subscriber Format
+52 (677) 820-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
677
Primary Location
Durango
Service Type
Landline
📋 Central Office Exchange 820 Routing Details
The 820 exchange code (central office prefix) operates within the 677 Numbering Plan Area (NPA) servicing Durango, Mexico. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +52 (677) 820 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
0677 820-1234or local national format. -
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International Calls: Dial
+52 677 820-1234from outside Mexico. -
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E.164 Standard:
+52677820XXXX
📞 Nearby Exchanges in Area Code 677
View All Area Code 677 Exchanges ›❓ Frequently Asked Questions
What area code is +52 (677) 820?
Phone numbers starting with +52 (677) 820 belong to the 677 area code in Durango, Mexico, routed via exchange block 820.
How do I call a 820 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 677, and the subscriber number.
Which provider operates the 820 prefix in Durango?
Telecom services for the 820 exchange block in Durango are primarily assigned to Local Network Carrier for Landline connections.