Jenkins lookalike domains
Greyphish has recorded 30 domains that resemble Jenkins since February 2026, 13 of them in the last 90 days. Nearly all of them (97%) are combosquats: Jenkins spelled correctly with a word added, most often “app”. .com carries 50% of them, out of 8 endings in all. The pace has picked up, with 12 in the last 30 days against 1 in the 30 before. 1 certificate for unregistered .com.ph names (registry wildcard) is excluded: the registry answers for any name under that ending, so nobody had to register one to get a certificate for it.
Data as of . Public sources only.
What kind of lookalikes
One or two keystrokes away from the real name: a letter dropped, doubled, swapped or mistyped. More
Words most often added to the name in the last 90 days: app (3).
Lookalikes per week
Show as a table
| Week of | Combo | Total |
|---|---|---|
| 2026-05-11 | 0 | 0 |
| 2026-05-18 | 0 | 0 |
| 2026-05-25 | 0 | 0 |
| 2026-06-01 | 0 | 0 |
| 2026-06-08 | 1 | 1 |
| 2026-06-15 | 0 | 0 |
| 2026-06-22 | 2 | 2 |
| 2026-06-29 | 0 | 0 |
| 2026-07-06 | 0 | 0 |
| 2026-07-13 | 0 | 0 |
| 2026-07-20 | 0 | 0 |
| 2026-07-27 | 0 | 0 |
| 2026-08-03 | 0 | 0 |
| 2026-08-10 | 0 | 0 |
| 2026-08-17 | 0 | 0 |
| 2026-08-24 | 0 | 0 |
| 2026-08-31 | 0 | 0 |
| 2026-09-07 | 0 | 0 |
| 2026-09-14 | 0 | 0 |
| 2026-09-21 | 0 | 0 |
| 2026-09-28 | 3 | 3 |
| 2026-10-05 | 2 | 2 |
| 2026-10-12 | 3 | 3 |
| 2026-10-19 | 3 | 3 |
| 2026-10-26 | 1 | 1 |
| 2026-11-02 | 1 | 1 |
Endings
The 8 most used of the 8 top-level domains these lookalikes sit under.
| Ending | Lookalikes | Share |
|---|---|---|
| .com | 15 | 50.0% |
| .io | 5 | 16.7% |
| .co.uk | 3 | 10.0% |
| .net | 3 | 10.0% |
| .click | 1 | 3.3% |
| .com.au | 1 | 3.3% |
| .info | 1 | 3.3% |
| .xyz | 1 | 3.3% |
Where they are registered
For the 22 with a registrar in WHOIS (73% 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 |
|---|---|---|---|
| Gandi | 7 | 31.8% | Retail |
| GoDaddy | 5 | 22.7% | Retail |
| Squarespace | 2 | 9.1% | Retail |
| Tucows | 2 | 9.1% | Retail |
| Chengdu Fly-Digital Technology | 1 | 4.5% | Retail |
| Cloudflare | 1 | 4.5% | Retail |
| HTTP.NET INTERNET | 1 | 4.5% | Retail |
| NameBright | 1 | 4.5% | Retail |
What the live ones do
21 of these lookalikes were registered and checked for a website and mail: 15 (71%) served a website and 6 (29%) publish MX records, so they can receive email. Checks run on the higher-severity matches that resolve, not on every lookalike.
Google Web Risk lists none of the 7 live ones checked against it.
12 were tracked while live and 1 has 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 Jenkins; it is not necessarily malicious, and none of these is a claim about who registered it or why.
jenkinsservices[.]comCombo, Nov 3Not checkedjenkinsappraisalco[.]comCombo, Oct 30Serves a websitejenkinsappraisals[.]comCombo, Oct 21Serves a websitesupportmyjenkins[.]ioCombo, Oct 21Serves a websitesupportmyjenkins[.]comCombo, Oct 21Serves a websitegetjenkins[.]comCombo, Oct 17Serves a websiteMX recordsjenkinscenterstage[.]comCombo, Oct 13No site or mail when checkedjenkinsaccountants[.]co[.]ukCombo, Oct 13MX recordsjenkinsserviceshvac[.]comCombo, Oct 11Serves a websiteMX recordsjenkinsappliances[.]comCombo, Oct 9Serves a website
Or watch it free: Greyphish tells you when a new lookalike of your domain is registered or goes live.
Further reading
More in developer tools
Greyphish is not affiliated with Jenkins. Domains listed resemble Jenkins 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.