Greece • NPA 21
☎️ Central Office Exchange (NXX)
+30 (21) 803 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +30 (21) 803. Central office block assigned to Athens/Piraeus/Salamina, Greece.
Standard Subscriber Format
+30 (21) 803-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
21
Primary Location
Athens/Piraeus/Salamina
Service Type
Landline
📋 Central Office Exchange 803 Routing Details
The 803 exchange code (central office prefix) operates within the 21 Numbering Plan Area (NPA) servicing Athens/Piraeus/Salamina, Greece. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +30 (21) 803 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
021 803-1234or local national format. -
•
International Calls: Dial
+30 21 803-1234from outside Greece. -
•
E.164 Standard:
+3021803XXXX
📞 Nearby Exchanges in Area Code 21
View All Area Code 21 Exchanges ›❓ Frequently Asked Questions
What area code is +30 (21) 803?
Phone numbers starting with +30 (21) 803 belong to the 21 area code in Athens/Piraeus/Salamina, Greece, routed via exchange block 803.
How do I call a 803 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +30, then 21, and the subscriber number.
Which provider operates the 803 prefix in Athens/Piraeus/Salamina?
Telecom services for the 803 exchange block in Athens/Piraeus/Salamina are primarily assigned to Local Network Carrier for Landline connections.