International Calling
Reach family, friends, and businesses across Vietnam with crystal-clear calls. No download needed—call directly from your browser or dial from any phone.
Vietnam
Country code +84
$0.22
Landline
$0.25
Mobile
~60%
vs retail*
Average call quality
*Illustrative savings vs 2.5× directory rate — not a carrier quote.
Simple steps
Drag the slider to match your Vietnam call volume. See what you're spending versus what you could be spending with Sayfone.
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220
min / month
~$10.78/min
~$8.14/min
~$4.84/min
~$1.10/min
$0.220/min
Annual saving vs. AT&T
Based on 220 min/month
GETTING STARTED
No calling cards, no complicated setup. Start a call to any Vietnamese number in under a minute using just your browser or phone.
Instant access
Type or paste any Vietnam phone number starting with +84. We'll automatically format it and detect whether it's a landline or mobile.
Dialer
+00 000 000 00
Call directly from your browser using WebRTC, or choose to receive a callback on your own phone. Either way, the person you're calling sees a real phone number.
HD audio from your browser
You're billed only for the minutes you use at a flat per-minute rate. No connection fees, no subscriptions—hang up when you're done.
COST BREAKDOWN
International calls to Vietnam carry higher costs than many Southeast Asian destinations. Understanding why helps you find smarter alternatives.
Vietnam's telecom sector is dominated by state-owned operators like Viettel (owned by the Ministry of Defence) and VNPT. International termination rates are set within a regulated framework, keeping interconnection fees higher than in fully liberalized markets.
When a call originates overseas and terminates on a Vietnamese network, the local carrier charges a termination fee. These fees are higher for mobile numbers than landlines, and Vietnam's mobile-dominant population means most calls route to costlier mobile endpoints.
Traditional carriers add their own markup on top of termination fees, plus currency conversion charges. Multi-hop call routing through intermediary carriers can further inflate the per-minute price you pay.
The rise of OTT services like Zalo and Viber has reduced voice revenue for Vietnamese carriers, but international termination fees remain a revenue source carriers are reluctant to lower. This keeps traditional international calling prices elevated.
Sources
Supports claims about Vietnam's telecom market structure and state ownership.
Supports claims about OTT services and market competition dynamics.
ALTERNATIVES COMPARED
From messaging apps to calling cards, here's how people stay in touch with Vietnam today—and where each option falls short.
Zalo
Zalo is Vietnam's dominant messaging app with roughly 80 million monthly active users. It works well for Zalo-to-Zalo calls, but the other party must also use Zalo—and you both need stable internet. It cannot reach landlines or non-Zalo numbers.
WhatsApp / Viber
WhatsApp and Viber have gained downloads in Vietnam recently, but penetration remains low compared to Zalo. These apps require both parties to use the same platform, need a solid data connection, and can't dial Vietnamese landlines or non-app numbers directly.
International Calling Cards
Prepaid calling cards were once the go-to for calls to Vietnam. They often carry hidden connection fees, rounding charges, and maintenance deductions. Rates are rarely as low as advertised after all fees are factored in.
Mobile Carrier International Plans
Major US carriers like AT&T, T-Mobile, and Verizon charge premium per-minute rates for direct-dialed calls to Vietnam unless you add a specific international plan. Even with plans, rates are usually significantly higher than dedicated international calling services.
Sayfone (Browser Calling)
Call any Vietnamese phone number—landline or mobile—directly from your browser or phone. No app required, no subscription, and transparent per-minute billing. The call reaches real phone numbers, so the other party doesn't need any app.
Bar lengths reflect relative cost tiers for each option — not survey percentages.
Sources
Supports Zalo adoption claims.
Supports messaging platform usage statistics.
APP LIMITATIONS
Messaging apps work great when both people are online—but calling Vietnam often means reaching landlines, older relatives, or businesses that don't use the same app.
Whether you're calling a grandmother's landline in Hanoi, a mobile in Ho Chi Minh City, or a business in Da Nang—Sayfone connects to real phone numbers on Vietnam's telecom network. No app needed on either end.
The problem
In Vietnam, Zalo holds roughly 79% messaging penetration while WhatsApp sits at approximately 6%. If your contact uses Zalo and you use WhatsApp, you simply can't connect via messaging apps without both switching platforms.
Government offices, hospitals, hotels, and many small businesses in Vietnam still rely on landlines. No messaging app can ring a Vietnamese landline—you need a real phone call.
While Vietnam's major cities have strong 4G and emerging 5G coverage, rural and mountainous areas can have inconsistent data connections. Voice-over-internet calls drop or degrade when bandwidth is limited.
Many older Vietnamese adults communicate primarily through regular phone calls and Zalo. Asking them to install and learn a different app just to talk with you overseas is often impractical.
Sources
Context for WhatsApp's limited penetration despite recent download surges.
CALLING TIPS
Vietnam operates on Indochina Time (UTC+7) year-round with no daylight saving changes. Here's how to time your calls right and make a great impression.
Vietnam Time Zone
UTC+7 (ICT)
No daylight saving time
US Eastern → Vietnam
+12 hours (winter) / +11 hours (summer)
8 PM EST = 8 AM next day VN
US Pacific → Vietnam
+15 hours (winter) / +14 hours (summer)
5 PM PST = 8 AM next day VN
UK → Vietnam
+7 hours (winter) / +6 hours (summer)
1 PM GMT = 8 PM VN
Schedule Evening Calls in Vietnam
Vietnamese people are most relaxed and available after dinner, between 7 PM and 9:30 PM local time. This translates to early morning on the US East Coast—a manageable overlap if you're an early riser.
Respect the Lunch Break
A midday break from roughly 11:30 AM to 1:30 PM is culturally important across Vietnam. Businesses frequently close or reduce staffing during this period, so avoid calling during these hours.
Account for DST Shifts in Your Country
Vietnam never changes its clocks, but if you're in the US or Europe, the time gap shifts by one hour when your country enters or exits daylight saving time. Double-check the offset before calling.
Weekend Calls Are Welcome
For personal calls, weekends are generally a great time to reach people in Vietnam. Many families gather on Sunday, making it an ideal window for longer conversations.
Use Formal Greetings
When calling a Vietnamese business contact, open with a polite greeting using the appropriate honorific. 'Xin chào' (hello) followed by a title like 'anh' (brother/Mr.) or 'chị' (sister/Ms.) is standard and appreciated.
Be Patient and Indirect
Vietnamese business culture values harmony and indirect communication. Getting straight to business without social pleasantries can seem rude. Spend a few minutes on small talk first.
Confirm Meetings by Phone
In Vietnam, phone confirmation of meetings is common and expected, even after email confirmation. A brief call the day before shows professionalism and respect.
Hierarchy Matters
Vietnamese workplaces observe clear hierarchies. When calling a company, ask to speak with the most senior relevant person. Address them with respectful titles throughout the conversation.
Sources
Confirms UTC+7 and no DST.
Supports time difference calculations.
POPULAR DESTINATIONS
Whether you're reaching family in Ho Chi Minh City or a business contact in Hanoi, here's what you need to know about calling Vietnam's most-called cities.
Ho Chi Minh City
Formerly Saigon, Ho Chi Minh City is Vietnam's largest city and commercial capital. Most international business calls to Vietnam terminate here. Use area code 28 for landlines.
Best time to call: 7:00 PM – 9:30 PM local (ICT)
Photo brief: Ho Chi Minh City skyline night Unsplash
Hanoi
Hanoi is Vietnam's capital and political center, home to government offices, embassies, and a thriving tech scene. Use area code 24 for landlines in the Hanoi region.
Best time to call: 7:00 PM – 9:30 PM local (ICT)
Photo brief: Hanoi old quarter street Pexels
Da Nang
Da Nang is a major coastal city and tourism gateway to central Vietnam, including Hoi An and Hue. Use area code 236 for landlines. The city has a fast-growing tech and services sector.
Best time to call: 7:00 PM – 9:00 PM local (ICT)
Photo brief: Da Nang Vietnam beach dragon bridge Unsplash
Hai Phong
Hai Phong is Vietnam's third-largest city and a major industrial port in the north. It's a key hub for manufacturing and trade. Use area code 225 for landlines.
Best time to call: 7:00 PM – 9:00 PM local (ICT)
Photo brief: Hai Phong Vietnam harbor Pexels
Can Tho
Can Tho is the largest city in the Mekong Delta region, known for its floating markets and agricultural economy. Use area code 292 for landlines.
Best time to call: 7:00 PM – 9:00 PM local (ICT)
Photo brief: Can Tho floating market Mekong Vietnam Unsplash
DIALING GUIDE
Vietnam uses the country code +84. Drop the leading '0' from local numbers when dialing internationally. Here's the exact format for landlines and mobiles.
Vietnam updated its area codes in 2017–2019 as part of a national numbering plan overhaul. Make sure you're using the current codes listed below.
+84 [mobile prefix] [subscriber number]
+84 [area code] [subscriber number]
| City / region | Code |
|---|---|
| Hanoi | 24 |
| Ho Chi Minh City | 28 |
| Da Nang | 236 |
| Hai Phong | 225 |
| Can Tho | 292 |
| Hue | 234 |
| Nha Trang | 258 |
| Vung Tau | 254 |
| Bien Hoa | 251 |
| Quy Nhon | 256 |
Sources
Confirms +84 dialing format and 9-digit mobile / 10-digit landline structure.
Detailed breakdown of area codes and mobile prefixes.
COMMON QUESTIONS
Answers to the most common questions about international calling rates, dialing formats, time zones, and staying connected with people in Vietnam.
Still have questions? Our support team is here to help.
Contact SupportEXPLORE MORE
Vietnam is just one of the many countries you can call at competitive rates. Explore other popular international calling destinations.
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