Updated · Volt Ghost team
The Contabo group
| What we measured | Value (10 Nov 2026) |
|---|---|
| Disposable domains with a Contabo mail host (AS51167) | 603 of 6,656 mapped (9%) |
| Contabo-only (no MX host elsewhere) | 591 |
| How many machines | 14 IPv4 addresses for 17 MX names |
| First listed in 2026 | 596 (June 273, July 20, August 286, September 9) |
| Names under a shared parent (io.vn, dynamic-DNS services), not registered domains | 321 |
| Sender records on 9 Nov | SPF on 19, DMARC on 15 |
| With an IPv6 mail address | 2 |
Two machines, two services
| Address | MX host names | Listed domains | Reverse DNS |
|---|---|---|---|
144.91.107.45 | tinyhost.shop | 299 | vmi2567647.contaboserver.net |
13.140.134.192 | vietxf.com (171) and tempmail.tw (111) | 282 | vmi3582966.contaboserver.net |
| 12 other addresses | 14 host names | 22 | Mixed |
The Tinyhost and TEMPMAIL.TW groups each have their own server page with the full history: Tinyhost domains and TEMPMAIL.TW domains. Seen from the network side, the striking part is how little infrastructure is involved. 581 listed domains depend on two virtual machines, and neither machine has had its reverse DNS changed from the provider's default name.
Almost entirely 2026
Only 7 of the 603 domains were listed before 2026. The rest arrived in two waves: 273 in June 2026 and 286 in August 2026, matching the bulk additions covered on the June 2026 and August 2026 pages. More than half (321) are names under a shared parent rather than registered domains, mostly io.vn (60) and free dynamic-DNS services such as dynv6.net, and only 19 publish SPF: these services set up DNS for receiving and nothing else.
| Added to the list in | Contabo-hosted domains |
|---|---|
| 2018 | 2 |
| 2024 | 1 |
| 2025 | 4 |
| 2026 | 596 |
If you only need an inbox
A domain that lives on one rented machine can vanish when the machine does. If you are picking a throwaway inbox for a sign-up you might need again, a service that keeps mail longer, such as 7-day temp mail, is safer than a random new domain. For a quick one-off code, 10 minute mail is enough.
Blocking by network
Contabo also hosts thousands of ordinary VPS customers, so a network-wide block would reject real addresses. Because this group is so concentrated, an address rule on the two machines above would catch about 96% of it today, until either service moves. The disposable list check stays correct when that happens. See the same breakdown for Hetzner, DigitalOcean, OVHcloud.
Data: Cloudflare DNS-over-HTTPS reads on 10 Nov 2026; IP owners from Team Cymru (AS51167) and reverse DNS from PTR lookups; listing months from the upstream list's Git history. The full method is on the Hetzner page.
Check one domain
Paste one email address or domain to test it against the disposable list, or to see its MX hosts. Lookups run one at a time.
Questions
How many disposable email domains are hosted on Contabo?
603 listed domains had an MX server on Contabo on 10 November 2026; 591 of them use Contabo for every MX host. They sit on just 14 IPv4 addresses.
Which temp mail services use Contabo?
Tinyhost (MX tinyhost.shop, 299 listed domains on one address) and TEMPMAIL.TW (MX tempmail.tw or vietxf.com, 282 domains on another). A dozen smaller hosts make up the rest.
Why do the mail servers have contaboserver.net reverse DNS?
Both main addresses still carry Contabo's default reverse DNS names (vmi followed by a number at contaboserver.net) instead of a name matching the MX host. Many receiving and sending checks treat a mismatch like that as a weak spam signal.
Are all Contabo-hosted email domains disposable?
No. Contabo is a general VPS provider with many ordinary customers. Only domains on the disposable list are counted here; check any other domain one at a time with the lookup on this page.
