India • NPA 1237
☎️ Central Office Exchange (NXX)
+91 (1237) 621 Exchange Code
Technical registry directory for telephone subscriber numbers starting with +91 (1237) 621. Central office block assigned to Sardhana, Uttar Pradesh, India.
Standard Subscriber Format
+91 (1237) 621-XXXX
Telecom Carrier
Local Network Carrier
Area Code (NPA)
1237
Primary Location
Sardhana, Uttar Pradesh
Service Type
Landline
📋 Central Office Exchange 621 Routing Details
The 621 exchange code (central office prefix) operates within the 1237 Numbering Plan Area (NPA) servicing Sardhana, Uttar Pradesh, India. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.
Telecommunication services within the +91 (1237) 621 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
01237 621-1234or local national format. -
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International Calls: Dial
+91 1237 621-1234from outside India. -
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E.164 Standard:
+911237621XXXX
📞 Nearby Exchanges in Area Code 1237
View All Area Code 1237 Exchanges ›❓ Frequently Asked Questions
What area code is +91 (1237) 621?
Phone numbers starting with +91 (1237) 621 belong to the 1237 area code in Sardhana, Uttar Pradesh, India, routed via exchange block 621.
How do I call a 621 exchange number from abroad?
To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +91, then 1237, and the subscriber number.
Which provider operates the 621 prefix in Sardhana, Uttar Pradesh?
Telecom services for the 621 exchange block in Sardhana, Uttar Pradesh are primarily assigned to Local Network Carrier for Landline connections.