What is the country code for South Korea?

The country code for South Korea is +82.

How are mobile numbers structured in South Korea?

Mobile numbers in South Korea always start with the prefix '010' and are followed by an 8-digit subscriber number, formatted as 010-XXXX-YYYY.

What are the dialing procedures for international calls to South Korea?

To call South Korea from abroad, dial the international access code (e.g., 00 or +), followed by the country code +82, and then the local number without the leading '0'. For example, +82-2-1234-5678 for a landline in Seoul.

Is number portability available in South Korea?

Yes, number portability is available in South Korea for both mobile and fixed-line numbers, allowing subscribers to retain their phone numbers when switching between different service providers.

Which major telecom operators are active in South Korea, and what are their number ranges?

The major telecom operators in South Korea include KT, LG U+, SK Telecom, and SK Broadband. All mobile numbers use the '010' prefix, while fixed-line prefixes vary by region, such as 02 for Seoul (KT), 042 for Daejeon (LG U+), and 051 for Busan (SK Telecom).

What is the country code for South Korea?

The country code for South Korea is +82.

How do I dial a mobile number in South Korea from abroad?

To dial a South Korean mobile number from abroad, use the format: +82 10 xxxx xxxx, omitting the leading 0.

What is the format for South Korean landline numbers?

South Korean landline numbers are formatted as 0[2-6][0-9]{1,2}-[0-9]{3,4}-[0-9]{4}, where the first digit indicates the area.

How do I call a South Korean landline from another country?

To call a South Korean landline from abroad, dial +82 followed by the area code without the initial 0, and then the subscriber number.

What is the national prefix for dialing within South Korea?

The national prefix for dialing within South Korea is 0.

Can I keep my phone number if I switch providers in South Korea?

Yes, South Korea allows number portability, so you can keep your phone number when switching providers.

What is the international dialing prefix for outgoing calls from South Korea?

The international dialing prefix for outgoing calls from South Korea is 00.

What are the emergency numbers in South Korea?

South Korea uses short codes for emergencies, such as 119 for fire and ambulance services.

Who manages the telephone numbering plan in South Korea?

The Ministry of Science and ICT manages the telephone numbering plan in South Korea.

What does the prefix 010 indicate in South Korean phone numbers?

The prefix 010 indicates a mobile phone number in South Korea.

Are there toll-free numbers in South Korea?

Yes, toll-free numbers in South Korea start with 080 and are free from landlines, though mobile charges may apply.

What are premium rate numbers in South Korea used for?

Premium rate numbers in South Korea, starting with 060, are used for specialized services like voting or adult content.

What is number portability and when was it introduced in South Korea?

Number portability allows users to retain their phone numbers when switching providers. It was introduced in South Korea in 2004.

Which regulatory body oversees telecommunications in South Korea?

The Ministry of Science and ICT oversees telecommunications regulations in South Korea.

How can I check the latest telecommunications regulations in South Korea?

You can visit the Ministry of Science and ICT's official website for the latest regulations.

What is a 'golden number' in South Korea?

A 'golden number' in South Korea is a phone number with repeated digits, often auctioned or sold at a premium.

How are phone numbers allocated in South Korea?

Phone numbers in South Korea are allocated by the Ministry of Science and ICT based on demand and service type.

What standards does South Korea comply with for phone numbers?

South Korea complies with ITU-T standards E.123 and E.164 for phone numbers.

What does the prefix 060 indicate in South Korean phone numbers?

The prefix 060 in South Korean phone numbers indicates a premium rate service.

How do I make an international call from South Korea to the United States?

To make an international call from South Korea to the US, dial 001 followed by the US area code and subscriber number.

Understanding Phone Numbers in South Korea

Quick Reference

Country: South Korea
Country Code: +82
International Prefix: 00(?:[125689]|3(?:[46]5|91)|7(?:00|27|3|55|6[126]))
National Prefix: 0

Overview

This comprehensive guide offers a detailed look into South Korea's telephone numbering system, including number formats, dialing procedures, and regulatory information. It is essential for telecom professionals, developers, and systems administrators to accurately implement South Korean phone number formats.

Number Formats

General Number Structure

South Korea's phone numbers follow a national numbering plan managed by the Ministry of Science and ICT. The structure includes:

Country Code: +82
National Prefix: 0 (for domestic calls)
Subscriber Number: Varies by service type (e.g., landline, mobile)

Number Structure Details

Service Type	Format	Example	Description
Geographic	`0[2-6][0-9]{1,2}-[0-9]{3,4}-[0-9]{4}`	02-1234-5678	Assigned by region, with the first digit indicating the area.
Mobile	`010-[0-9]{4}-[0-9]{4}`	010-1234-5678	Always starts with `010`, followed by an 8-digit number.
Toll-Free	`080-[0-9]{3,4}-[0-9]{4}`	080-123-4567	Free from landlines, may incur charges from mobiles.
Premium Rate	`060-[2-9][0-9]{6}`	060-2123456	Used for specialized services like voting or adult content.
Emergency	`1[0-9]{2}`	119	Short codes for emergencies, such as `119` for fire and ambulance services.

Regular Expressions for Validation

Geographic Numbers:
```
^0[2-6][0-9]{1,2}-[0-9]{3,4}-[0-9]{4}$
```
Mobile Numbers:
```
^010-[0-9]{4}-[0-9]{4}$
```
Toll-Free Numbers:
```
^080-[0-9]{3,4}-[0-9]{4}$
```
Premium Rate Numbers:
```
^060-[2-9][0-9]{6}$
```
Emergency Numbers:
```
^1[0-9]{2}$
```

Dialing Procedures

Domestic Calls

Landline to Landline: Dial the area code (with 0), then the subscriber number.
- Example: 02-1234-5678
Landline to Mobile: Dial 010, then the subscriber number.
- Example: 010-1234-5678
Mobile to Mobile: Dial the full number directly.
- Example: 010-1234-5678

International Calls

Outgoing: Dial 00, then the destination country code, area code, and subscriber number.
- Example: To the US: 001-212-555-1234
Incoming: Dial +82, then the local number without 0.
- Example: +82-2-1234-5678

Number Portability

Number portability in South Korea allows both mobile and fixed-line users to retain their numbers when switching providers. Introduced in 2004, this service enhances consumer flexibility.

Major Telecom Operators and Number Ranges

Operator	Mobile Prefixes	Fixed-Line Prefixes
KT	010	02, 031, 032, etc.
LG U+	010	042, 043, 044, etc.
SK Telecom	010	051, 052, 053, etc.
SK Broadband	010	054, 055, 061, etc.

Regulatory Body

The Ministry of Science and ICT oversees South Korea's telephone numbering plan. For current regulations, visit their official website.

Technical Considerations

Number Allocation and Management

The MSIT strictly manages number allocation based on demand and service type, with specific prefixes designated for particular services (e.g., 010 for mobile).

Special Cases

Golden Numbers: Highly sought after for their repeated digits, often auctioned or sold at a premium.
Number Blocking: Certain numbers may be blocked for security, especially for international calls.

ITU-T Standards Compliance

South Korea complies with ITU-T standards E.123 and E.164, ensuring global compatibility.

For the latest on telecommunications regulations in South Korea, visit the Ministry of Science and ICT.

Conclusion

South Korea's telephone numbering system is robust and internationally compliant, meeting the needs of its highly connected population. Understanding its structure and regulations is crucial for effective communication within and beyond South Korea.