bitctf.cn
Observed Aug 11, 2026, 05:38 UTC (6d ago). Every field below was attested with an Ed25519 signature at scan time.
bitctf.cn is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting bitctf.cn under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.
Watch bitctf.cn Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Fastly
Let's EncryptSteady. No change on record for bitctf.cn in the last day; this reading matches the one before it. The steady record is signed like every other reading. Watch it to catch the next move the moment it lands.
DNS Records
A 4
185.199.111.153185.199.110.153185.199.109.153185.199.108.153
AAAA 4
2606:50c0:8000::1532606:50c0:8001::1532606:50c0:8002::1532606:50c0:8003::153
MX 3
15mx3.qiye.aliyun.com5mx1.qiye.aliyun.com10mx2.qiye.aliyun.com
TXT 1
v=spf1 include:spf.qiye.aliyun.com -all
NS 2
dns20.hichina.comdns19.hichina.com
SOA 1
dns19.hichina.com hostmaster.hichina.com
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
bitctf.cn |
C=US, O=Let's Encrypt, CN=YR2 | Wed, 14 Oct 2026 23:16:44 +0000 |
YR2 |
C=US, O=ISRG, CN=Root YR | Sat, 02 Sep 2028 23:59:59 +0000 |
Root YR |
C=US, O=Internet Security Research Group, CN=ISRG Root X1 | Thu, 02 Sep 2032 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_4a5dc57592efdeb4- Output Hash
caacfd9a60fa42f342733f4f720e345e171c623af2aac7471c9f04d8fe76d2a3- Signature
ed25519:f3c3b46c9a212e4fb8456879faf68096add03bd613dc691b5af896d3e421cfe22544cb35f44c04a74344d878ce151b64550d56e29f0a0cac8b189b9b1d78bf0a- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast