Thailand voice guidelines
Thailand voice guidelines
Voice calling guidelines for Thailand (TH), covering reachability, caller ID formats, DTMF support, and emergency services.
Locale overview
| Field | Value |
|---|---|
| Country | Thailand |
| ISO code | TH |
| Region | Asia-Pacific |
| Dialing code | +66 |
Reachability
| Call type | Inbound | Outbound |
|---|---|---|
| Domestic | Supported | Supported |
| International | Supported | Supported |
| Toll-free | Supported | Not supported |
Using an Outbound Number that is not a ringDNA Smart Number is not supported for outbound calls to Thailand domestic numbers. Use a provisioned Thailand phone number for domestic outbound calls. Outbound calls from toll-free numbers are not allowed.
Caller ID
| Call type | Direction | Format |
|---|---|---|
| Domestic | Inbound | +E.164 |
| Domestic | Outbound | Local |
| International | Inbound | +E.164 (non-guaranteed) |
| International | Outbound | +E.164 |
| Toll-free | Inbound | +E.164 |
| Toll-free | Outbound | N/A |
DTMF support
DTMF is supported using RFC 2833 for both inbound and outbound calls.
Emergency services
Calls to emergency services are not supported in Thailand.
Compliance note
These guidelines summarize carrier requirements at the time of publication and do not constitute legal counsel. Verify that your implementation complies with all applicable telecommunications regulations in Thailand.