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Every record for a domain, blocklists for an IP
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Names registered to look like yours

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Tick who sends as you, get the records
Route to Refused
Safe, tested steps to refuse forged mail
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Read DMARC reports
Provider XML reports, made readable

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Up to 25 domains in one table, worst first
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Find risks

DNS lookup
Every record for a domain, blocklists for an IP
Trust map
Every domain your email depends on
Find lookalikes
Names registered to look like yours

Fix records

Write records
Tick who sends as you, get the records
Route to Refused
Safe, tested steps to refuse forged mail
Try a change
Preview an edit before you publish
Check DNS changes
See who has your new record yet

Read your mail

Trace an email
Paste headers to see a message's route
Read DMARC reports
Provider XML reports, made readable

Many domains

Check a fleet
Up to 25 domains in one table, worst first
Compare
Up to 4 domains side by side
Badges and API
README badge, JSON and a CI check

Reading DNS…

Stamp

Lookups read public DNS. Answers are shared for up to five minutes. Nothing is saved.

No emails were forged in the making of this site.

Designed and built independently.

dns.google DNS records | Stamp

Domain or IP addressDomain

dns.google

7 of 9 record types published. Grade its email setup

A2 AAAA2 MX0 TXT2 NS4 CNAME0 SOA1 CAA2 DMARC1

A2

Website address, IPv4

8.8.4.4TTL 300
8.8.8.8TTL 300

AAAA2

Website address, IPv6

2001:4860:4860::8844TTL 300
2001:4860:4860::8888TTL 300

MX

Where its mail goes

None published

TXT2

Notes, SPF among them

SPFv=spf1 -all
https://xkcd.com/1361/

NS4

Who answers for its DNS

ns1.zdns.google
ns2.zdns.google
ns3.zdns.google
ns4.zdns.google

CNAME

Alias for another name

None published

SOA1

The zone's admin details

ns1.zdns.google cloud-dns-hostmaster.google.com 1 21600 3600 259200 300

CAA2

Who may issue its certificates

128 issue "pki.goog"
0 issue "pki.goog"

DMARC1

What to do with forged mail

v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com

Blocklists

Not listed on Spamhaus DBL.

Spamhaus DBL