Ireland DNS Propagation Checker
Run a DNS lookup against 6 resolvers located in Ireland — Dublin · Shannon · Greystones · Cork · Dublin · Greystones.
- Resolved
- No answer
- Checking
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Dublin
Ireland
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Shannon
Ireland
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Greystones
Ireland
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Cork
Ireland
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Dublin
Ireland
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Greystones
Ireland
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What checking DNS from Ireland 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 Ireland 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 Ireland until its cached copy expires. The check confirms the new value has reached the resolvers your Ireland visitors depend on.
Ireland hosts the European headquarters of Google, Meta and Microsoft, plus a dense cluster of cloud and CDN infrastructure wired together at INEX, the Irish neutral exchange. The resolver an ordinary household in Cork or Galway actually queries isn't one of those, though — it's whatever Eir, Vodafone or Virgin Media hands out over the router.
That gap is the point. Ireland runs no national DNS filter, but it does have court-ordered blocking. The High Court regularly grants rightsholders injunctions forcing the big ISPs to block piracy sites and live sports streams — the Premier League won the country's first live blocking order in 2019 — and An Garda Síochána gives ISPs a list of child-abuse domains that redirect to a stop page. Those blocks live on the ISP resolver.
Checking a record from inside Ireland shows what Eir, Vodafone and Virgin subscribers really see, blocks included, not what a global resolver like 8.8.8.8 returns.
- Eir (eircom) Incumbent former state telecom; largest base, court-ordered blocks
- Vodafone Ireland89.19.64.36 Major mobile and broadband ISP; default resolver
- Virgin Media Ireland89.101.160.4 Cable incumbent (ex-UPC/NTL); default resolver on its network
Answers for a narrow set of domains — court-ordered piracy and live-sports sites, plus Garda-listed child-abuse domains — can differ between Irish ISP resolvers and a global resolver; ordinary records resolve the same.
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 Ireland 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 Ireland 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 Ireland?
It depends on the record's time-to-live, not on the country.
Resolvers in Ireland 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 Ireland 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 Ireland, 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 Ireland specifically?
Because it shows what visitors in Ireland actually resolve, which can differ from a global lookup.
If your audience is in Ireland, or you have moved hosting or mail there, checking against in-country resolvers confirms the records have reached the servers those users rely on.
Why does a site resolve on 8.8.8.8 but fail on my Eir or Virgin Media connection?
Because Ireland's blocking happens at the ISP, not at Google or Cloudflare. The High Court has ordered Eir, Vodafone, Virgin Media and Sky to block a defined set of piracy and live-sports-streaming domains, and the ISPs also honour a Garda list of child-abuse domains that redirects to a stop page. A public resolver outside those ISPs applies none of that, so the same name can answer there and fail on your home line.
Does Ireland run a national DNS blocklist?
No. There's no central government filter of the kind some countries operate. Blocking works two ways: voluntarily, through the Garda CSAM Memorandum of Understanding signed by Eir, Vodafone, Sky, Three and others; and by court order, where rightsholders win High Court injunctions against named ISPs. Both are applied per-ISP, which is why what resolves depends on whose resolver you're querying from.
