What is a DNS checker?

A DNS checker queries the Domain Name System for every record type of a domain — the addresses it points to (A, AAAA), its mail servers (MX), name servers (NS), verification strings (TXT) and security policies (CAA) — and reports exactly what is published.

Why can't I see a CNAME record for my domain's root?

DNS does not allow a CNAME on the zone apex (example.com itself) — the root must use A/AAAA records. CNAME records only appear on subdomains like www.example.com.

How long do DNS changes take to show up?

Each record carries a TTL (time to live) that tells resolvers how long to cache it — from seconds to days. After editing a record, public resolvers keep serving the old answer until its TTL expires, so propagation can take as long as the previous TTL.

Nānā DNS — Nānā DNS manuahi (A, AAAA, MX, TXT, NS Records)

Ke hoʻomākaukau nei i ka nānā…

He aha ke ʻano o kēlā me kēia ʻano moʻolelo DNS

ʻOi aku ka nui o ka waihona o ka Domain Name System ma mua o ka helu wahi. Ke nīnau nei kēia mea nānā iā DNS ola ma luna o DNS-over-HTTPS i hoʻopili ʻia a hōʻike i kēlā me kēia ʻano moʻolelo i paʻi ʻia e ka domain:

A / AAAA — ʻo ka IPv4 / IPv6 ke kuhikuhi nei i nā wahi kikoʻī. Me ka liʻiliʻi o hoʻokahi o kēia mau mea, ʻaʻole hiki i kahi kikowaena ke hoʻokipa i kahi pūnaewele.
CNAME — he inoa inoa e kuhikuhi ana i kekahi inoa i kekahi. ʻAʻole ʻae ʻia ma ka apex zone, no laila example.com e hōʻike maʻamau ʻaʻohe.
MX — nā kikowaena leka i loaʻa i ka leka uila no ka domain, kēlā me kēia me ka mea nui. 'A'ohe MX ma'amau 'a'ohe leka uila.
NS - nā kikowaena inoa mana e pane no ka ʻāpana.
TXT — kikokikona manuahi: nā kulekele anti-spoofing SPF, kau inoa ʻana o DKIM (ma nā subdomains), nā hōʻailona hōʻoia hōʻoia ʻona.
CAA — ʻo nā mana palapala e ʻae ʻia e hoʻopuka i nā palapala hōʻoia TLS no ka domain.
SOA - nā metadata hoʻokele o ka ʻāpana: ka inoa inoa mua, ka hoʻopili a me ka hoʻopaʻa ʻana i nā manawa.

No ke aha e nānā ai i nā moʻolelo DNS?

Ma hope o ka neʻe ʻana a i ʻole ka hoʻoponopono DNS — e hōʻoia i ke ola ʻana o nā moʻolelo hou ma nā mea hoʻoholo lehulehu, ʻaʻole wale ma ka huna huna o kāu kamepiula ponoʻī.
Hiki i ka leka uila - e hōʻoia i ka pololei o nā mea komo SPF/MX ma mua o ka hoʻomaka ʻana o nā leka.
Nā loiloi palekana - ʻike i nā loli TXT/NS i manaʻo ʻole ʻia, a e hōʻoia i ka papa inoa o CAA i nā CA wale nō āu e hoʻohana ai.

Manaʻo kōkua: ʻAʻole ʻike koke ʻia nā hoʻoponopono DNS ma nā wahi āpau - haʻi ka TTL o kēlā me kēia moʻolelo i nā mea hoʻoholo i ka lōʻihi o ka hūnā i ka pane kahiko. E hoʻohaʻahaʻa i ka TTL ma mua o kahi hoʻololi i hoʻolālā ʻia, a laila e hoʻāla hou aʻe ma hope.

Loaʻa nā helu wahi? E nana Domain i IP no ka ʻike piha hoʻokipa o kahi helu wahi, holo a nānā papa inoa ʻeleʻele maluna ona, a heluhelu paha i kona hoʻohuli DNS.

FAQ

Nā nīnau nānā DNS

He aha ka mea nānā DNS?

Ke nīnau nei kahi mea nānā DNS i ka Pūnaehana Name Domain no kēlā me kēia ʻano moʻolelo o kahi kikowaena - nā helu wahi āna e kuhikuhi ai (A, AAAA), kāna mau leka uila (MX), nā inoa inoa (NS), nā kaula hōʻoia (TXT) a me nā kulekele palekana (CAA) - a hōʻike pololei i ka mea i paʻi ʻia.

No ke aha ʻaʻole hiki iaʻu ke ʻike i kahi moʻolelo CNAME no ke kumu o kaʻu kikowaena?

ʻAʻole ʻae ʻo DNS i kahi CNAME ma ka piko o ka ʻāpana (example.com ponoʻī) - pono ke kumu e hoʻohana i nā moʻolelo A/AAAA. Hōʻike ʻia nā moʻolelo CNAME ma nā subdomains like www.example.com.

Pehea ka lōʻihi e hōʻike ʻia ai nā loli DNS?

Lawe ʻia kēlā me kēia moʻolelo i kahi TTL (manawa e ola ai) e hōʻike ana i ka poʻe hoʻoholo i ka lōʻihi o ka hūnā ʻana iā ia - mai kekona a i nā lā. Ma hope o ka hoʻoponopono ʻana i kahi moʻolelo, mālama ka poʻe hoʻoholo lehulehu i ka pane kahiko a hiki i ka pau ʻana o kāna TTL, no laila hiki ke lōʻihi ka hoʻolaha ʻana e like me ka TTL mua.