Mexico • NPA 421
☎️ Central Office Exchange (NXX)
+52 (421) 423 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +52 (421) 423. Central office block assigned to Guanajuato, Mexico.
Standard Subscriber Format
+52 (421) 423-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
421
Primary Location
Guanajuato
Service Type
Landline
📋 Central Office Exchange 423 Routing Details
The 423 exchange code (central office prefix) operates within the 421 Numbering Plan Area (NPA) servicing Guanajuato, Mexico. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +52 (421) 423 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
0421 423-1234or local national format. -
•
International Calls: Dial
+52 421 423-1234from outside Mexico. -
•
E.164 Standard:
+52421423XXXX
📞 Nearby Exchanges in Area Code 421
View All Area Code 421 Exchanges ›❓ Frequently Asked Questions
What area code is +52 (421) 423?
Phone numbers starting with +52 (421) 423 belong to the 421 area code in Guanajuato, Mexico, routed via exchange block 423.
How do I call a 423 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 421, and the subscriber number.
Which provider operates the 423 prefix in Guanajuato?
Telecom services for the 423 exchange block in Guanajuato are primarily assigned to Local Network Carrier for Landline connections.