Netherlands • NPA 172
☎️ Central Office Exchange (NXX)
+31 (172) 556 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +31 (172) 556. Central office block assigned to Alphen aan den Rijn, Netherlands.
Standard Subscriber Format
+31 (172) 556-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
172
Primary Location
Alphen aan den Rijn
Service Type
Landline
📋 Central Office Exchange 556 Routing Details
The 556 exchange code (central office prefix) operates within the 172 Numbering Plan Area (NPA) servicing Alphen aan den Rijn, Netherlands. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +31 (172) 556 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.
🌐 Dialing Instructions
-
•
Domestic Calls: Dial
0172 556-1234or local national format. -
•
International Calls: Dial
+31 172 556-1234from outside Netherlands. -
•
E.164 Standard:
+31172556XXXX
📞 Nearby Exchanges in Area Code 172
View All Area Code 172 Exchanges ›❓ Frequently Asked Questions
What area code is +31 (172) 556?
Phone numbers starting with +31 (172) 556 belong to the 172 area code in Alphen aan den Rijn, Netherlands, routed via exchange block 556.
How do I call a 556 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +31, then 172, and the subscriber number.
Which provider operates the 556 prefix in Alphen aan den Rijn?
Telecom services for the 556 exchange block in Alphen aan den Rijn are primarily assigned to Local Network Carrier for Landline connections.