What is the country code for Vietnam?

Vietnam's country code is +84. When calling from South Korea, dial your exit code (001, 002, or 00700) followed by 84 and the Vietnamese number without the leading 0.

What exit code do I use to call internationally from South Korea?

South Korea has carrier-specific exit codes: 001 (KT), 002 (LG U+), and 00700 (SK Telink). On a mobile phone, you can simply use the + symbol instead of any exit code.

How much does it cost to call Vietnam from South Korea with Sayfone?

Sayfone offers calls to Vietnam at $0.22 per minute. This is a straightforward per-minute rate with no hidden fees or connection charges.

What is the time difference between South Korea and Vietnam?

South Korea (KST, UTC+9) is 2 hours ahead of Vietnam (ICT, UTC+7). Neither country observes daylight saving time, so this difference is constant year-round.

Do I need to drop the 0 when calling a Vietnamese number?

Yes. Vietnamese numbers written locally start with 0 (e.g., 024 for Hanoi, 098 for mobile). When calling from South Korea, always remove this leading 0 and dial +84 followed by the remaining digits.

What are the area codes for major Vietnamese cities?

The main area codes are: Hanoi (24), Ho Chi Minh City (28), Da Nang (236), Hai Phong (225), Can Tho (292), and Nha Trang (258). Remember to drop the leading 0 when dialing from abroad.

Can I call a Vietnamese mobile number the same way as a landline?

Yes, the format is the same: exit code + 84 + number without the leading 0. The only difference is that mobile numbers use operator prefixes (03x, 05x, 07x, 08x, 09x) instead of geographic area codes.

Do I need to install an app to use Sayfone?

No. Sayfone works directly in your browser — no app download or installation required. Just visit the Sayfone website, enter the Vietnamese number you want to call, and connect.

Quick Answer

How to Call Vietnam from South Korea

To call Vietnam from South Korea, dial your exit code (001, 002, or 00700) + 84 + the Vietnamese number without the leading 0. On a mobile phone, simply dial +84 followed by the number. Sayfone connects you at $0.22/min.

See full dialing instructions

Cost tools

🇰🇷From South Korea

To Vietnam🇻🇳

$0.22

Per minute

+84

Country code

Call quality

Landline rate

$0.22/min

Mobile rate

$0.22/min

Same per-minute Sayfone rate for landline and mobile.

Average call quality

Whether you're reaching family in Ho Chi Minh City, a colleague in Hanoi, or a business partner in Da Nang, the dialing format from South Korea is straightforward. The 2-hour time difference between KST and ICT makes coordinating calls convenient.

Steps at a glance

Dial your carrier exit code (001, 002, 00700) or use + on mobile
Enter 84 (Vietnam's country code)
Dial the Vietnamese number without the leading 0
Press call — you're connected

Sources

1
Telephone numbers in Vietnam — Wikipedia
Country code and number format reference
2
How to Make International Calls from South Korea — FreJun
South Korea exit code reference

DIALING GUIDE

Step-by-Step: Calling Vietnam from South Korea

Follow these steps to reach any landline or mobile number in Vietnam from your South Korean phone.

1
Dial the South Korea exit code
From a landline, enter your carrier's international access code: 001 (KT), 002 (LG U+), or 00700 (SK Telink). From a mobile phone, you can simply press and hold 0 to enter the + symbol, which replaces the exit code.
```
001 or 002 or 00700 (landline) — + (mobile)
```
2
Enter Vietnam's country code
Dial 84, which is the international country code for Vietnam. This routes your call to the Vietnamese telephone network.
```
001-84 or +84
```
3
Dial the area code or mobile prefix (drop the leading 0)
For landlines, enter the Vietnamese area code without the leading 0. For example, Hanoi is 24, Ho Chi Minh City is 28, and Da Nang is 236. For mobile numbers, drop the leading 0 from the prefix — a number starting with 09x becomes 9x.
```
001-84-24 (Hanoi landline) or +84-98 (mobile)
```
4
Dial the subscriber number
Enter the remaining digits of the local phone number. Landline subscriber numbers are typically 7–8 digits, while mobile numbers (after the operator prefix) are 7 digits.
```
001-84-24-1234-5678 (Hanoi landline) or +84-98-765-4321 (mobile)
```
5
Press call
Your call will connect to Vietnam. The complete dialing sequence from a South Korean mobile looks like +84 followed by the full number without the leading 0.
```
+84 28 1234 5678 (Ho Chi Minh City landline)
```

Dialing format reference

+84

Use these patterns when entering a full international number to +84.

Mobile

+84 [9x/8x/7x/5x/3x] xxx xxxx

Landline

+84 [area code] [subscriber number]

+84 24 1234 5678 (Hanoi landline)
+84 28 1234 5678 (Ho Chi Minh City landline)
+84 236 123 4567 (Da Nang landline)
+84 98 765 4321 (mobile)

Major city area codes

Hanoi24

Ho Chi Minh City28

Da Nang236

Hai Phong225

Can Tho292

Nha Trang258

Sources

1
Telephone numbers in Vietnam — Wikipedia
Vietnam number formats and area codes
2
International Calls from South Korea — FreJun
South Korea carrier exit codes (001, 002, 00700)
3
Vietnam Phone Number Format — Calilio
Vietnam mobile and landline format details

DIALING RULES

Important Dialing Rules for Vietnam Calls

Keep these rules in mind to avoid failed calls or wrong connections when dialing Vietnam from South Korea.

Always drop the leading 0

Vietnamese phone numbers written for domestic use start with 0 (e.g., 024 for Hanoi, 098 for a mobile). When calling internationally from South Korea, omit this leading 0. Dial 84-24 instead of 84-024.

Choose the right South Korea exit code

South Korea has multiple carrier-specific exit codes: 001 (KT), 002 (LG U+), and 00700 (SK Telink). On a mobile, using the + prefix works universally regardless of carrier.

Vietnam mobile numbers are 10 digits domestically

Vietnamese mobile numbers are 10 digits long in local format (including the leading 0). After dropping the 0, you will dial 9 digits following the country code +84. Common mobile prefixes include 09x, 03x, 05x, 07x, and 08x.

Landline area codes vary by city

Vietnam's landline area codes are 2–3 digits long. Major cities: Hanoi (24), Ho Chi Minh City (28), Da Nang (236), Hai Phong (225). The total landline number is 10 digits including the trunk code, so after the country code you'll dial 9 digits.

Use the + prefix from mobile phones

If you're calling from a South Korean mobile, simply start with + (press and hold 0 or the + key) instead of dialing a carrier-specific exit code. This is the simplest and most universal method.

TIMING TIPS

Best Times to Call Vietnam from South Korea

South Korea (KST) is 2 hours ahead of Vietnam (ICT). Use these timing tips to reach your contacts during convenient hours.

🇻🇳

The small time difference between South Korea and Vietnam makes this one of the easiest international calling corridors to schedule. Most of the business day overlaps between the two countries.

Time & windows

Time Difference

KST = ICT + 2 hours

South Korea is 2 hours ahead of Vietnam year-round

Best for Personal Calls

8:00 PM – 10:00 PM KST

6:00 PM – 8:00 PM in Vietnam — evening, after work

Best for Business Calls

11:00 AM – 5:00 PM KST

9:00 AM – 3:00 PM in Vietnam — core business hours

🇰🇷Morning call (Vietnam waking up)

9:00 AM – 10:00 AM KST7:00 AM – 8:00 AM ICT — early morning in Vietnam

🇰🇷Business hours overlap

11:00 AM – 7:00 PM KST9:00 AM – 5:00 PM ICT — full Vietnam working day

🇰🇷Evening personal call

8:00 PM – 11:00 PM KST6:00 PM – 9:00 PM ICT — post-dinner in Vietnam

🇰🇷Avoid (late night in Vietnam)

1:00 AM – 8:00 AM KST11:00 PM – 6:00 AM ICT — sleeping hours

Calling tips

Neither South Korea nor Vietnam uses daylight saving time, so the 2-hour gap is constant all year.
Weekday evenings (after 8 PM KST) are ideal for personal calls — it's 6 PM in Vietnam and most people are home from work.
For business calls to Ho Chi Minh City or Hanoi offices, call between 11 AM and 5 PM KST (9 AM–3 PM Vietnam time).
Avoid calling Vietnam before 9 AM KST (7 AM ICT) on weekends — let your contacts sleep in.

Business etiquette

Vietnamese business culture values polite greetings — open with a brief personal greeting before discussing work topics.
Formal titles (Mr., Mrs., or professional titles) are appreciated in initial Vietnamese business calls.
If calling a Korean manufacturing partner's office in Vietnam, be aware that factory shifts may start earlier than typical office hours.
Confirm the meeting time in both KST and ICT to avoid confusion.

Sources

1
Seoul to Hanoi Time Conversion — 24timezones.com
Time difference verification
2
Time Difference: South Korea vs Vietnam — TravelMath
Best calling window calculation

TROUBLESHOOTING

Common Issues When Calling Vietnam from South Korea

If your call isn't connecting, check these common causes and solutions.

Forgot to drop the leading 0

The most common mistake. Vietnamese numbers written locally include a leading 0 (e.g., 024 for Hanoi, 098 for mobile). When dialing internationally, always omit this 0 and dial the country code +84 followed by the remaining digits.

Wrong exit code for your carrier

South Korea uses different exit codes per carrier: 001 (KT), 002 (LG U+), 00700 (SK Telink). If one doesn't work, verify which carrier your line uses. On a mobile, use the + prefix to bypass carrier-specific codes entirely.

Old 11-digit mobile number

Vietnam migrated all mobile numbers from 11 digits to 10 digits (completed in 2018). If you have an old Vietnamese contact number starting with 012x, 016x, 018x, or 019x, it has been changed. Ask your contact for their updated 10-digit number.

Call not connecting to a Vietnamese mobile

Verify you are dialing the correct mobile operator prefix (03x, 05x, 07x, 08x, or 09x after dropping the 0). Some prepaid SIMs in Vietnam may have reception issues in remote areas. Try calling again after a few minutes.

High per-minute charges from Korean carriers

Traditional Korean carriers can charge 500–1,200 KRW per minute for international calls. Using a browser-based calling service like Sayfone at $0.22/min can significantly reduce your costs for regular calls to Vietnam.

Sources

1
Telephone numbers in Vietnam — Wikipedia
Number format and migration reference

Savings

See what you could save

Adjust the tools below to compare Sayfone with typical retail pricing for calls to Vietnam. Start with one call, then layer on monthly volume to see the bigger picture.

How to use these tools

Sayfone uses your live rate for calls to Vietnam — the same basis as the rest of this page.
First, estimate savings on a single call length. Then, model a full month of minutes versus typical retail benchmarks.
Retail competitor rows are illustrative — not a quote from any carrier.