mcgrawhill.ca
Observed Aug 2, 2026, 21:57 UTC (14d ago). Every field below was attested with an Ed25519 signature at scan time.
mcgrawhill.ca is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting mcgrawhill.ca 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 mcgrawhill.ca Watching a domain needs a DRM3 account. The reading above stays free and public either way.
ProofpointDNS Records
A 1
192.243.85.36
MX 2
10mxa-00363701.gslb.pphosted.com10mxb-00363701.gslb.pphosted.com
TXT 1
v=spf1 ip4:192.243.80.160/28 ip4:192.243.88.160/28 ip4:20.157.64.168/32 ip4:192.243.87.2/32 ip4:192.243.86.2/32 include:spf.protection.outlook.com mx -all
NS 4
pdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org
SOA 1
pdns85.ultradns.com hostmaster.mheducation.com
SRV 4
nj09exw002.mhf.mhc:443 p0nj09exw003.mhf.mhc:443 p0ny01exw002.mhf.mhc:443 p0ny01exw003.mhf.mhc:443 p0
DMARC_RECORDS 1
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
TLS Certificates (0)
None.
Subdomains (0)
None observed.
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_718a33e2bc2e83e1- Output Hash
661fb2de02d15def3b6073e308cc9e73047f7a0fd025103dffd2300e5aaafb1e- Signature
ed25519:c7827293dcfdc106be64483e32b1617584d3fa9e2fe49cbd6b8833f1cb9772953adc2f4aff315bcb9e99ac043f52412ec5539bc952a7bcbbe3f34e2e876ef601- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast