Vietnam DNS Propagation Checker
Run a DNS lookup against 6 resolvers located in Vietnam — Vinhomes Times City · Ho Chi Minh City · Hanoi · Ho Chi Minh City · Da Nang · Ho Chi Minh City.
- Resolved
- No answer
- Checking
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Vinhomes Times City
Vietnam
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Ho Chi Minh City
Vietnam
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Hanoi
Vietnam
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Ho Chi Minh City
Vietnam
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Da Nang
Vietnam
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Ho Chi Minh City
Vietnam
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What checking DNS from Vietnam tells you
A DNS resolver keeps a cached copy of each record for as long as its time-to-live allows, and does so separately in every location. A change you have published can be live on one resolver while another still serves the old answer.
Checking from Vietnam looks up the record on servers inside the country, so you see what people there actually get rather than what a resolver on another continent returns.
This matters most right after you edit a record: an update visible on a global resolver like 8.8.8.8 can still be stale at a local ISP in Vietnam until its cached copy expires. The check confirms the new value has reached the resolvers your Vietnam visitors depend on.
Vietnam's most common resolver is handed out by a phone company the army runs. Viettel is a wholly owned enterprise of the Ministry of National Defence and the country's largest carrier, with more than half the mobile market, and its DNS is the default for a big share of homes and handsets. VNPT, through its VDC data arm, and FPT Telecom cover most of the rest.
Blocking here happens mostly at the ISP resolver. Providers run DNS tampering against a government blacklist, so a banned domain can return NXDOMAIN or a block-page address while 8.8.8.8 answers normally. Steam's storefront vanished this way across major ISPs in May 2024. Checking from inside Vietnam shows the record Viettel, VNPT, and FPT customers actually receive, not what a resolver outside the country returns.
- Viettel203.113.131.1 Military-run telecom, Vietnam's largest ISP; default for most
- VNPT (VDC)203.162.4.191 State incumbent via its VDC data arm
- FPT Telecom210.245.24.20 Third major ISP; popular public resolver choice
Answers from Vietnamese ISP resolvers reflect state-mandated DNS filtering, so results for blocked domains can differ from what an unfiltered global resolver returns.
How DNS propagation works
Every DNS record carries a time-to-live: the seconds a resolver may keep its cached answer before asking again. Change a record and resolvers holding the old value keep serving it until that timer runs out.
Propagation is this expiry playing out across many independent resolvers, so a lower time-to-live set ahead of a change makes it take effect sooner. There is no fixed waiting period — each record's time-to-live decides how long the old answer lingers.
Frequently Asked Questions
Why do DNS servers in Vietnam return different results than 8.8.8.8?
Two things cause it. Each resolver caches independently, so one can hold an older answer than another.
And content delivery networks reply based on where the asking resolver is, steering a resolver in Vietnam toward a nearby edge node.
Both answers can be correct at the same time for their own location.
How long until a DNS change is visible in Vietnam?
It depends on the record's time-to-live, not on the country.
Resolvers in Vietnam keep the previous answer until their cached copy expires, then pick up the new one.
If you lowered the time-to-live before making the change, it appears sooner; otherwise the old value can persist until the original timer elapses.
Which DNS server should users in Vietnam use?
For most people the resolver their internet provider assigns is fine and usually the lowest latency.
Anyone who wants an alternative can point to a public resolver reachable from Vietnam, such as Cloudflare (1.1.1.1) or Google (8.8.8.8); the right choice depends on whether you value speed, privacy, or filtering.
Why check DNS from Vietnam specifically?
Because it shows what visitors in Vietnam actually resolve, which can differ from a global lookup.
If your audience is in Vietnam, or you have moved hosting or mail there, checking against in-country resolvers confirms the records have reached the servers those users rely on.
What DNS does Viettel use by default, and why check against it?
Viettel runs its own recursive resolvers and publishes the pair 203.113.131.1 and 203.113.131.2. Because Viettel carries more than half the market, these answers are what the majority of Vietnamese homes and phones get. They follow the country's blocking rules, so they are the ones to check if you want to see what most local users actually resolve, rather than a global resolver's view.
Is DNS filtered in Vietnam?
Yes. ISPs enforce a government blacklist mainly through DNS tampering, returning NXDOMAIN or a block-page address for banned domains. Steam's store was cut this way across major ISPs in May 2024 after the Ministry of Information and Communications said Valve had not licensed local game sales, and gambling, opposition, and some news sites are routinely affected. Switching to a public resolver like 8.8.8.8 or 1.1.1.1 bypasses much of it, which is why local and global checks diverge.
