Free tool / Lookalike radar
Has someone registered a domain like yours?
A perfect DMARC record stops forgeries of your own domain — not of yourcompany-billing.com. We generate the lookalikes a fraudster would pick and check, live, which ones exist and can receive email.
Public DNS only. Nothing is sent to any of these domains.
slack.com
22 lookalikes of slack.com can receive email right now.
- Lookalikes checked64
- Registered by others44
- Can receive email22
- Probably yours2
- Your domain renewsin 347 days
slack.net
Different ending · .net instead of .com · Porkbun LLC
slack.org
Different ending · .org instead of .com · GoDaddy.com, LLC
slack.io
Different ending · .io instead of .com
slack.biz
Different ending · .biz instead of .com · GoDaddy.com, LLC
slack.email
Different ending · .email instead of .com · IONOS SE
slack.de
Different ending · .de instead of .com
sl4ck.com
Look-alike characters · “4” for “a” · Squarespace Domains II LLC
5lack.com
Look-alike characters · “5” for “s” · XServer, Inc.
slack-support.com
Added word · “-support” added · GoDaddy.com, LLC
slack-online.com
Added word · “-online” added · OVH sas
sack.com
Missing letter · “l” left out · GoDaddy.com, LLC
slac.com
Missing letter · “k” left out · NameCheap, Inc.
salck.com
Swapped letters · “la” swapped · GoDaddy.com, LLC
slcak.com
Swapped letters · “ac” swapped · Dynadot Inc
sslack.com
Doubled letter · “s” doubled · Network Solutions, LLC
sllack.com
Doubled letter · “l” doubled
slaack.com
Doubled letter · “a” doubled
sl-ack.com
Added hyphen · hyphen added
alack.com
Typo (next key) · “a” for “s”
dlack.com
Typo (next key) · “d” for “s”
slsck.com
Typo (next key) · “s” for “a”
slacl.com
Typo (next key) · “l” for “k”
slack.xyz
Different ending · .xyz instead of .com
slack.us
Different ending · .us instead of .com
siack.com
Look-alike characters · “i” for “l”
slacksupport.com
Added word · “support” added
slackhq.com
Added word · “hq” added
slackteam.com
Added word · “team” added
slackgroup.com
Added word · “group” added
lack.com
Missing letter · “s” left out
slak.com
Missing letter · “c” left out
slakc.com
Swapped letters · “ck” swapped
slacck.com
Doubled letter · “c” doubled
slackk.com
Doubled letter · “k” doubled
slaxk.com
Typo (next key) · “x” for “c”
slavk.com
Typo (next key) · “v” for “c”
slacj.com
Typo (next key) · “j” for “k”
slack.co
Different ending · .co instead of .com
slack.app
Different ending · .app instead of .com
slack.eu
Different ending · .eu instead of .com
s1ack.com
Look-alike characters · “1” for “l”
slackmail.com
Added word · “mail” added
slack-hq.com
Added word · “-hq” added
skack.com
Typo (next key) · “k” for “l”
slack-mail.com
Added word · “-mail” added · MarkMonitor Inc.
slackonline.com
Added word · “online” added
What to do
- Warn the people who pay you. Tell customers and your bookkeeper that bank details never change by email, and name the domains above. A phone call to a known number beats any reply.
- Register the closest ones yourself. The other endings and the “-billing” style names cost a few euros a year; point them at your site and add
v=spf1 -alland a DMARCp=rejectrecord so they can never send mail. - Report active fraud. If a lookalike sends mail in your name, report it to its registrar’s abuse contact (named above where the registry publishes it) and to your national cybercrime reporting service.
- Make your own domain unforgeable. Run the inbox check for slack.com — lookalikes work best when the real domain can be forged too.
Registered doesn’t mean malicious: a lookalike may be parked, for sale, or someone’s unrelated business — an old registration usually is. Registration dates come from each registry’s public RDAP service where it has one. “Probably yours” means it uses the same name servers or mail servers as slack.com, or is held at the same brand-protection registrar. We check 64 of the most common variations, not every possible one.