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82
Total
90
DNS
90
Email
100
Security
35
Network
60
Availability
Domainalibris.com
IPv42
IPv60
MX records2
StatusActive
Domain technical report

Just a moment...

alibris.com

Generated: 2026-08-10T05:11:08-05:00 · Cached result

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IPv42
IPv60
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

2 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

80 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

✓
HTTP security headers35 / 35 pts · Security

9 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

!
HTTP response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
104.18.153.95
104.18.152.95

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
20 mx2-us1.ppe-hosted.com.
10 mx1-us1.ppe-hosted.com.

TXT

7 record(s)
"duo_sso_verification=GvMMzucxDXKoSwSJfA9qYhy63yAZcgJu1fe7YqMGe5BqvY8dklnSnpRGXPnp5G4J"
"v=spf1 a:mailhost2.alibris.com a:mailhost.alibris.com include:authsmtp.com include:_spf.zdsys.com include:mail.zendesk.com include:sendgrid.net  include:spf.protection.outlook.com   a:dispatch-us.ppe-hosted.com -all"
"ms-domain-verification=7e0288d9-64a0-401a-a690-29092b12aa06"
"google-site-verification=nZ6KPbX6L6enpA9mODgHjQwlHpaJIizGu2lQDpiU9Rg"
"sophos-domain-verification=18def0916d08e6e42418d8e9ece43208abafe15570e937d726a90707a045d9ad"
"anthropic-domain-verification-hdvgzn=LVX0fAGZTiC5hndqsXSOwppGE"
"MS=3BFB65151236B89414DE0F8A38E4633CC7697357"

NS

2 record(s)
ns5.alibris.com.
ns4.alibris.com.

SOA

1 record(s)
ns4.alibris.com. dns.cloudflare.com. 2411746120 10000 2400 604800 1800

CAA

11 record(s)
0 issue "godaddy.com"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issuewild "letsencrypt.org"
0 issue "letsencrypt.org"
0 issue "comodoca.com"
0 issue "ssl.com"
0 issuewild "ssl.com"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "comodoca.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issuewild "digicert.com; cansignhttpexchanges=yes"

DS

1 record(s)
2371 13 2 A596F092CB0788D6C83FF8AEB87494A9A356DABCE60284B2338B9334 AF8FD5C3

DNSKEY

2 record(s)
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==

RRSIG

3 record(s)
NS 13 2 86400 20260811111103 20260809091103 34505 alibris.com. 7W/oJkBTlXZEZJ+jJsdGvasG4Ih8Ej9f7UCDRak6qValbcLL5hCpnRfU kQhlDwz7jHQDgaK4uuLE3YmfYbsE8w==
TXT 13 2 300 20260811111103 20260809091103 34505 alibris.com. g8pAVq/QV49J2TbhGRmJwVMp2l2Ab9VTXTI3YvYNV44Y4/y0oS3tYsRB CH0e/sH9DdaWst4wYplfPNU3Svbrfg==
DS 13 2 86400 20260815002547 20260807231547 41446 com. BnEOn47zLgNI3kFPZ7e+6Ds8c55wrGgyr0gpsPWp6R71oCgxcSqDAc85 +9K8nN4lh5OKg1IT0yO0LAr3slqm2w==

NSEC

1 record(s)
\000.alibris.com. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 a:mailhost2.alibris.com a:mailhost.alibris.com include:authsmtp.com include:_spf.zdsys.com include:mail.zendesk.com include:sendgrid.net  include:spf.protection.outlook.com   a:dispatch-us.ppe-hosted.com -all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:postmaster@alibris.com; ruf=mailto:postmaster@alibris.com; fo=1

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJyuXktk49V6082/qXBtpPC/USNM+2ny2zoQv1ivA+hhQkF01EGP/1YFAixSyZjzYowZfkV44dcyvPsT696s/Z+ogAnbZxqBrf7vGIOhWv1YE7UyDUrjD0YVM1uG9yXOY0MM25zaCu2Av5DUg+k9wpMNA2iUI/DV9u6lKJxw8DDQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Just a moment...
Description
Final URL
https://www.alibris.com/
HTTP status
403

HTTP

Status
HTTP/2 403
Final URL
https://www.alibris.com/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
alibris.com
Valid from
2026-07-31T06:58:50-05:00
Valid until
2026-10-29T06:58:49-05:00
Days remaining
80
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

9 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
✓
Cross-Origin-Embedder-PolicyImplemented
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.18.152.95, 104.18.153.95
49,79 ms
Cloudflare
1.1.1.1
104.18.152.95, 104.18.153.95
27,64 ms
Quad9
9.9.9.9
104.18.152.95, 104.18.153.95
45,86 ms
OpenDNS
208.67.222.222
104.18.152.95, 104.18.153.95
42,69 ms
AdGuard
94.140.14.14
104.18.152.95, 104.18.153.95
58,16 ms

IP, geolocation and ASNAssociated network information

104.18.153.95

No data
success
No
country
region
city
asn
organization
isp

104.18.152.95

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mx2-us1.ppe-hosted.com

Port 25: Closed/unreachable - 8.2 ms - 
Port 465: Closed/unreachable - 4003 ms - 
Port 587: Closed/unreachable - 22.4 ms - 220 mx1-us1.ppe-hosted.com - Welcome to PPE Hosted ESMTP Server

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