Mexico • NPA 866
☎️ Central Office Exchange (NXX)
+52 (866) 490 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +52 (866) 490. Central office block assigned to Castanos/Monclova, COAH, Mexico.
Standard Subscriber Format
+52 (866) 490-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
866
Primary Location
Castanos/Monclova, COAH
Service Type
Landline
📋 Central Office Exchange 490 Routing Details
The 490 exchange code (central office prefix) operates within the 866 Numbering Plan Area (NPA) servicing Castanos/Monclova, COAH, Mexico. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +52 (866) 490 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
0866 490-1234or local national format. -
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International Calls: Dial
+52 866 490-1234from outside Mexico. -
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E.164 Standard:
+52866490XXXX
📞 Nearby Exchanges in Area Code 866
View All Area Code 866 Exchanges ›❓ Frequently Asked Questions
What area code is +52 (866) 490?
Phone numbers starting with +52 (866) 490 belong to the 866 area code in Castanos/Monclova, COAH, Mexico, routed via exchange block 490.
How do I call a 490 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 866, and the subscriber number.
Which provider operates the 490 prefix in Castanos/Monclova, COAH?
Telecom services for the 490 exchange block in Castanos/Monclova, COAH are primarily assigned to Local Network Carrier for Landline connections.