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Understanding Phone Numbers in Trinidad and Tobago
Quick Reference Guide
- Country: Trinidad and Tobago
- Country Code: +1 868
- International Prefix: 011
- National Prefix: 1
Detailed Overview
Discover the intricacies of Trinidad and Tobago's telephone numbering plan, essential for telecom professionals, developers, and system administrators. This guide covers number formats, dialing procedures, and regulatory frameworks.
Numbering Plan Structure
General Number Structure
Trinidad and Tobago utilizes the North American Numbering Plan (NANP), which includes:
- Country Code: +1
- Area Code: 868
- Subscriber Number: 7 digits
Number Format
The standard format for phone numbers in Trinidad and Tobago is:
+1 868 NXX XXXX
Nranges from 2 to 9.Xranges from 0 to 9.
Number Types and Formats
| Type | Format | Example | Regex |
|---|---|---|---|
| Landline | +1 868 [2-6]XX XXXX | +1 868 223 4567 | ^\+1 868 [2-6]\d{2} \d{4}$ |
| Mobile | +1 868 [3-9]XX XXXX | +1 868 399 1234 | ^\+1 868 [3-9]\d{2} \d{4}$ |
| Toll-Free | +1 800 [2-9]XX XXXX | +1 800 234 5678 | ^\+1 800 [2-9]\d{2} \d{4}$ |
| Premium Rate | +1 900 [2-9]XX XXXX | +1 900 987 6543 | ^\+1 900 [2-9]\d{2} \d{4}$ |
Dialing Procedures
Domestic Calls
- Landline to Landline: Dial the 7-digit subscriber number.
- Landline to Mobile: Dial the 7-digit mobile number.
- Mobile to Mobile: Dial the 7-digit mobile number.
International Calls
- Outgoing: Dial
011+1+868+ 7-digit number. - Incoming: Use the respective international prefix followed by
+1 868and the local number.
Number Portability
Trinidad and Tobago supports Mobile Number Portability (MNP), allowing users to keep their numbers when switching providers. This applies to both mobile and fixed-line services.
Major Telecom Operators and Number Ranges
| Operator | Number Ranges |
|---|---|
| Telecommunications Services of Trinidad and Tobago (TSTT) | +1 868 620 XXXX to +1 868 629 XXXX |
| Digicel Trinidad and Tobago | +1 868 300 XXXX to +1 868 399 XXXX |
| LaqTel | +1 868 400 XXXX to +1 868 409 XXXX |
ITU-T Recommendations
Trinidad and Tobago adheres to ITU-T Recommendations E.123 and E.164, which standardize the international format of telephone numbers.
Number Allocation and Management
The Telecommunications Authority of Trinidad and Tobago (TATT) manages the allocation and regulation of phone numbers, ensuring compliance with the NANP.
Recent or Upcoming Changes
Currently, there are no significant changes to the numbering plan. TATT reviews and may reassign codes as needed. For updates, refer to TATT's official publications.
Technical Considerations for Developers
- Validation: Use the regex patterns provided to validate phone numbers.
- Formatting: Store numbers in the E.164 format (
+1868XXXXXXX) for consistency. - Number Portability: Consider MNP when designing systems involving user phone numbers.
For the latest telecommunications regulations and number management in Trinidad and Tobago, visit the Telecommunications Authority of Trinidad and Tobago (TATT).