Russia • NPA 494
☎️ Central Office Exchange (NXX)
+7 (494) 231 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +7 (494) 231. Central office block assigned to Kostroma, Russia.
Standard Subscriber Format
+7 (494) 231-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
494
Primary Location
Kostroma
Service Type
Landline
📋 Central Office Exchange 231 Routing Details
The 231 exchange code (central office prefix) operates within the 494 Numbering Plan Area (NPA) servicing Kostroma, Russia. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +7 (494) 231 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
0494 231-1234or local national format. -
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International Calls: Dial
+7 494 231-1234from outside Russia. -
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E.164 Standard:
+7494231XXXX
📞 Nearby Exchanges in Area Code 494
View All Area Code 494 Exchanges ›❓ Frequently Asked Questions
What area code is +7 (494) 231?
Phone numbers starting with +7 (494) 231 belong to the 494 area code in Kostroma, Russia, routed via exchange block 231.
How do I call a 231 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +7, then 494, and the subscriber number.
Which provider operates the 231 prefix in Kostroma?
Telecom services for the 231 exchange block in Kostroma are primarily assigned to Local Network Carrier for Landline connections.