mcgraw-hill.com

Observed Jul 22, 2026, 00:17 UTC (2d 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.

Verify this receipt yourself + Watch this domain

Not responding

Runs onVercara

Email byProofpoint

Registered withCSC Corporate Domains, Inc.

tranco_20k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat mcgraw-hill.com actually stands on - every host below is a signed observation

mcgraw-hill.com

A / AAAA

204.74.99.100

Vercaraserves the site

pdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org

ultradns.biz + ultradns.com + moreanswers its DNS

mxa-00363701.gslb.pphosted.commxb-00363701.gslb.pphosted.com

Proofpointreceives its email

DNS Records

A 1

204.74.99.100

MX 2

10mxa-00363701.gslb.pphosted.com
10mxb-00363701.gslb.pphosted.com

TXT 3

MS=ms88994943
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 -all
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

NS 4

pdns85.ultradns.biz
pdns85.ultradns.com
pdns85.ultradns.net
pdns85.ultradns.org

SOA 1

pdns85.ultradns.com hostmaster.mheducation.com

SRV 3

media1.mcgraw-hill.com:5060 p10
media1.mcgraw-hill.com:5061 p10
xmpp.mcgraw-hill.com:5269 p0

TLS Certificates (0)

None.

Subdomains (0)

None observed.

The proof

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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for mcgraw-hill.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/mcgraw-hill.com">
  <img src="https://domaindrift.io/badge/mcgraw-hill.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for mcgraw-hill.com">
</a>

Ed25519 Receipt

Receipt ID: rcpt_ae615ef6bcc86028
Output Hash: aa2bb8253222f830ddf5e2fa4cc59a7015cf5e895e2166abe500d94637bcb460
Signature: ed25519:5d8c91b4b927d9ec502d9d1bd1c2efbd39f843733c3ea7b16e16bf8ba615e9fe371e82aedaf78f93d0e829570c801d9d229c5810c6982b0764c8fd90676f2104
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/mcgraw-hill.com