book.com
Observed Aug 12, 2026, 03:23 UTC (10h 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.
Not responding
Runs onBarnes & Noble
Email byProofpoint
ProofpointRegistered withCSC Corporate Domains, Inc.
tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat book.com actually stands on - every host below is a signed observation
book.com
A / AAAA
161.221.74.21365.204.48.118
Barnes & Nobleserves the site
NS
ns2.barnesandnoble.commail9th1.barnesandnoble.comns3.barnesandnoble.comns4.barnesandnoble.com
barnesandnoble.comanswers its DNS
MX
mxb-00189e01.gslb.pphosted.commxa-00189e01.gslb.pphosted.com
Proofpointreceives its email
DNS Records
A 2
161.221.74.21365.204.48.118
MX 2
20mxb-00189e01.gslb.pphosted.com10mxa-00189e01.gslb.pphosted.com
TXT 3
KKlDGzG3UjouWYqiXPEiGjq0uNppIzPrIdQtxrov++Nmfa6l9wO1eYHTE5zAbwWPz9jp+/gsoULzgY4UR27muA==v=spf1 mx include:spf-00189e01.pphosted.com include:spf.protection.outlook.com ~allMS=ms18834698
NS 4
ns2.barnesandnoble.commail9th1.barnesandnoble.comns3.barnesandnoble.comns4.barnesandnoble.com
SOA 1
pnjmasterns01.barnesandnoble.com domainadmin.book.com
DMARC_RECORDS 1
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_a3c1051452f21e28- Output Hash
a9a4f367ac01105d20f6bf47090b9889d3cde9d31cb665806e63bc8b3f253a86- Signature
ed25519:7620f3bddb2a61af83479bc6b5a44cb14ffb411d44a913280a5c4df9770d4ab2c97b789e906dc8bef59217699cf78bd09bf8c4110595204905fe560386144f0a- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast