Finland • NPA 20
☎️ Central Office Exchange (NXX)
+358 (20) 303 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +358 (20) 303. Central office block assigned to Non-Geographical Services, Finland.
Standard Subscriber Format
+358 (20) 303-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
20
Primary Location
Non-Geographical Services
Service Type
Landline
📋 Central Office Exchange 303 Routing Details
The 303 exchange code (central office prefix) operates within the 20 Numbering Plan Area (NPA) servicing Non-Geographical Services, Finland. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +358 (20) 303 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
020 303-1234or local national format. -
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International Calls: Dial
+358 20 303-1234from outside Finland. -
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E.164 Standard:
+35820303XXXX
📞 Nearby Exchanges in Area Code 20
View All Area Code 20 Exchanges ›❓ Frequently Asked Questions
What area code is +358 (20) 303?
Phone numbers starting with +358 (20) 303 belong to the 20 area code in Non-Geographical Services, Finland, routed via exchange block 303.
How do I call a 303 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +358, then 20, and the subscriber number.
Which provider operates the 303 prefix in Non-Geographical Services?
Telecom services for the 303 exchange block in Non-Geographical Services are primarily assigned to Local Network Carrier for Landline connections.