South Korea voice guidelines
Voice calling guidelines for South Korea (KR), covering reachability, caller ID formats, DTMF support, and emergency services.
Locale overview
| Field | Value |
|---|---|
| Country | South Korea |
| ISO code | KR |
| Region | Asia-Pacific |
| Dialing code | +82 |
Reachability
| Call type | Inbound | Outbound | Notes |
|---|---|---|---|
| Domestic | Yes | Yes | — |
| International | Yes | Yes | — |
| Toll-free | Yes | No | Toll-free numbers support inbound calls only; outbound is not supported |
Caller ID
| Call type | Inbound format | Outbound format |
|---|---|---|
| Domestic | +E.164 | Local (non-guaranteed) |
| International | +E.164 (non-guaranteed) | +E.164 |
| Toll-free | +E.164 | N/A |
Caller ID delivery is not guaranteed for all call types. Domestic outbound calls present a local format number, but delivery is not guaranteed. International inbound caller ID is delivered in E.164 format where available, but is also non-guaranteed.
DTMF support
DTMF (Dual-Tone Multi-Frequency) signaling uses RFC 2833 format and is supported for both inbound and outbound calls.
Emergency services
Calling emergency services is not supported. Do not rely on voice calling to contact emergency services in South Korea.
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 South Korea.