duct.co.kr
Observed Aug 10, 2026, 19:26 UTC (1h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.
DomainDrift asked this domain for a TXT record at a name nobody registers, and got an answer back. A domain that answers a name that was never created is answering names in general, and that is wildcard DNS.
Wildcard DNS clusters around domain parking, dynamic DNS and catch-all hosting. It is also a real attack surface: if every invented hostname resolves, then a hostname an attacker invents resolves too, which is the ground state for subdomain takeover and for phishing hosted under a name that looks legitimate.
This is evidence of wildcard behaviour, not a proven fact. It rests on one control name: a domain could legitimately serve a TXT record at exactly that name for an unrelated reason, and a wildcard that answers address records but not TXT records would not be caught here at all. What this reading is and is not.
DNS Records
A 1
114.108.128.130
MX 2
10mx01.mailplug.com20mx02.mailplug.com
TXT 1
v=spf1 mx include:mailplug.com ~all
NS 4
ns0.cafe24.comns1.cafe24.comns2.cafe24.comns.cafe24.com
SOA 1
duct.co.kr postmaster.duct.co.kr
MCP_RECORDS 1
v=spf1 mx include:mailplug.com ~all
DMARC_RECORDS 1
v=spf1 mx include:mailplug.com ~all
BIMI_RECORDS 1
v=spf1 mx include:mailplug.com ~all
MTA_STS_RECORDS 1
v=spf1 mx include:mailplug.com ~all
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
duct.co.kr |
C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA DV R36 | Fri, 05 Feb 2027 23:59:59 +0000 |
Sectigo Public Server Authentication CA DV R36 |
C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root R46 | Fri, 21 Mar 2036 23:59:59 +0000 |
Sectigo Public Server Authentication Root R46 |
C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority | Mon, 18 Jan 2038 23:59:59 +0000 |
Subdomains (1)
Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_bf08faa2b876e83c- Output Hash
cc45a90a7e87d51a89bd87538523b258394faff17b1c56e0c86bf0fde0fb984b- Signature
ed25519:4b37a0fb97b0e552e3ca374901e64eafc2bc4444aae0255b1944a79226b9ab017f13a15175d15bdacca73c59bd2b9bedfbf32a28c2948f56e9b4df0338604a04- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast