blackerboard.com
Observed Aug 2, 2026, 22:18 UTC (11d ago). Every field below was attested with an Ed25519 signature at scan time.
blackerboard.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting blackerboard.com 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 blackerboard.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Let's EncryptDNS Records
A 1
217.160.150.20
MX 1
10mail.blackerboard.com
TXT 1
v=spf1 a mx ~all
NS 4
ns1053.ui-dns.dens1031.ui-dns.bizns1026.ui-dns.comns1017.ui-dns.org
SOA 1
ns1017.ui-dns.org hostmaster.1und1.com
DMARC_RECORDS 1
v=DMARC1; p=quarantine; rua=mailto:05848faa@mxtoolbox.dmarc-report.com; ruf=mailto:05848faa@forensics.dmarc-report.com; fo=1
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
blackerboard.com |
C=US, O=Let's Encrypt, CN=YR1 | Tue, 22 Sep 2026 01:47:45 +0000 |
YR1 |
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_41d0b80354e1b3f7- Output Hash
07f1102b878f15a0ebccb58a915f334f3ff56cea0af673c03b0f1cb8c1917212- Signature
ed25519:5f9c552f8c6aed6dde1ee936ca9bb38991322f573b346eda511cb448cf12d132c5145f270077b9a4f33e257980056abad4c9bae6ec251f35d296bcddad325300- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast