Auth0 lookalike domains
Greyphish has recorded 40 domains that resemble Auth0 since February 2026, 5 of them in the last 90 days. Most of them (65%) are combosquats: Auth0 spelled correctly with a word added. .com carries 78% of them, out of 9 endings in all. 8 certificates for unregistered .ph, .com.ph, .net.ph names (registry wildcard) are excluded: the registry answers for any name under those endings, so nobody had to register one to get a certificate for it.
Data as of . Public sources only.
What kind of lookalikes
Lookalikes per week
Show as a table
| Week of | Combo | Homoglyph | Total |
|---|---|---|---|
| 2026-04-20 | 0 | 0 | 0 |
| 2026-04-27 | 2 | 0 | 2 |
| 2026-05-04 | 0 | 0 | 0 |
| 2026-05-11 | 2 | 0 | 2 |
| 2026-05-18 | 1 | 0 | 1 |
| 2026-05-25 | 0 | 0 | 0 |
| 2026-06-01 | 3 | 0 | 3 |
| 2026-06-08 | 0 | 0 | 0 |
| 2026-06-15 | 0 | 0 | 0 |
| 2026-06-22 | 0 | 0 | 0 |
| 2026-06-29 | 0 | 0 | 0 |
| 2026-07-06 | 1 | 0 | 1 |
| 2026-07-13 | 0 | 0 | 0 |
| 2026-07-20 | 0 | 0 | 0 |
| 2026-07-27 | 0 | 0 | 0 |
| 2026-08-03 | 0 | 0 | 0 |
| 2026-08-10 | 1 | 0 | 1 |
| 2026-08-17 | 0 | 1 | 1 |
| 2026-08-24 | 0 | 0 | 0 |
| 2026-08-31 | 0 | 1 | 1 |
| 2026-09-07 | 0 | 0 | 0 |
| 2026-09-14 | 0 | 0 | 0 |
| 2026-09-21 | 0 | 0 | 0 |
| 2026-09-28 | 0 | 1 | 1 |
| 2026-10-05 | 1 | 0 | 1 |
| 2026-10-12 | 0 | 0 | 0 |
Endings
The 8 most used of the 9 top-level domains these lookalikes sit under.
| Ending | Lookalikes | Share |
|---|---|---|
| .com | 31 | 77.5% |
| .cfd | 2 | 5.0% |
| .click | 1 | 2.5% |
| .help | 1 | 2.5% |
| .ink | 1 | 2.5% |
| .net | 1 | 2.5% |
| .ngo.ph | 1 | 2.5% |
| .online | 1 | 2.5% |
Where they are registered
For the 28 with a registrar in WHOIS (70% of all). Brand-protection registrars mostly hold defensive registrations made by brands themselves, so a domain there is more likely the brand's own than an imitation.
| Registrar | Lookalikes | Share | Type |
|---|---|---|---|
| MarkMonitor | 7 | 25.0% | Brand protection |
| NICENIC INTERNATIONAL GROUP | 3 | 10.7% | Retail |
| Ultahost | 3 | 10.7% | Retail |
| Network Solutions | 2 | 7.1% | Retail |
| Tucows | 2 | 7.1% | Retail |
| Aceville | 1 | 3.6% | Retail |
| Cloudflare | 1 | 3.6% | Retail |
| GoDaddy | 1 | 3.6% | Retail |
What the live ones do
Google Web Risk lists none of the 2 live ones checked against it.
2 were tracked while live and 0 have since gone down. See what to do about a lookalike.
Recent examples
The 10 most recent, written with [.] so they cannot be clicked. The brand's own domains and registrations held by brand-protection registrars are left out. A lookalike resembles Auth0; it is not necessarily malicious, and none of these is a claim about who registered it or why.
auth0services[.]comCombo, Oct 11Serves a websiteMX recordsautho[.]comHomoglyph, Sep 29Not checkedxn--auth-jra[.]comShown in a browser as authø[.]comHomoglyph, Aug 31No site or mail when checkedavtho[.]comHomoglyph, Aug 19Not checkedsecure-web-auth0-625f683d[.]comCombo, Aug 15Not checkedauth0app[.]ngo[.]phCombo, Jul 6Not checkedauth0secure[.]netCombo, Jun 2No site or mail when checkedauth0verify[.]comCombo, Jun 1Not checkedauth0secure[.]comCombo, Jun 1Not checkedsecure-auth000[.]onlineCombo, May 21Not checked
Or watch it free: Greyphish tells you when a new lookalike of your domain is registered or goes live.
Further reading
More in security
Greyphish is not affiliated with Auth0. Domains listed resemble Auth0 by spelling; registration alone says nothing about intent. Counts cover domains first seen in public Certificate Transparency logs and ICANN zone files; domains that Greyphish customers watch are excluded.