Russia • NPA 343
☎️ Central Office Exchange (NXX)
+7 (343) 421 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +7 (343) 421. Central office block assigned to Ekaterinburg, Russia.
Standard Subscriber Format
+7 (343) 421-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
343
Primary Location
Ekaterinburg
Service Type
Landline
📋 Central Office Exchange 421 Routing Details
The 421 exchange code (central office prefix) operates within the 343 Numbering Plan Area (NPA) servicing Ekaterinburg, Russia. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +7 (343) 421 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
0343 421-1234or local national format. -
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International Calls: Dial
+7 343 421-1234from outside Russia. -
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E.164 Standard:
+7343421XXXX
📞 Nearby Exchanges in Area Code 343
View All Area Code 343 Exchanges ›❓ Frequently Asked Questions
What area code is +7 (343) 421?
Phone numbers starting with +7 (343) 421 belong to the 343 area code in Ekaterinburg, Russia, routed via exchange block 421.
How do I call a 421 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 343, and the subscriber number.
Which provider operates the 421 prefix in Ekaterinburg?
Telecom services for the 421 exchange block in Ekaterinburg are primarily assigned to Local Network Carrier for Landline connections.