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84
Total
60
DNS
90
Email
96
Security
65
Network
100
Availability
Domaincdlib.org
IPv44
IPv60
MX records1
StatusActive
Domain technical report

California Digital Library

cdlib.org

The California Digital Library exists to support the University of California community’s pursuit of scholarship and to extend the University’s public service mission.

Generated: 2026-08-09T15:55:16-05:00 · Cached result

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IPv44
IPv60
MX1
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

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

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 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

216 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers31 / 35 pts · Security

8 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-108-157-150-53.mci50.r.cloudfront.net

✓
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 response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

4 record(s)
108.157.150.53
108.157.150.129
108.157.150.41
108.157.150.122

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 cdlib-org.mail.protection.outlook.com.

TXT

2 record(s)
"v=spf1 include:spf.protection.outlook.com include:spf-na.exlibrisgroup.com include:_spf-amer.onbmc.com include:mailcontrol.com -all"
"dtm-domain-verification=gQo3a74HSN8IGSpHnf395SOW57cvm42lF8Hmp7SXLa0"

NS

4 record(s)
ns-1574.awsdns-04.co.uk.
ns-378.awsdns-47.com.
ns-1175.awsdns-18.org.
ns-937.awsdns-53.net.

SOA

1 record(s)
ns-1175.awsdns-18.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

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 include:spf.protection.outlook.com include:spf-na.exlibrisgroup.com include:_spf-amer.onbmc.com include:mailcontrol.com -all

DMARC

Configured
v=DMARC1;p=quarantine;pct=100;rua=mailto:cqghfdqa@ag.us.dmarcian.com,mailto:dmarc_agg@vali.email

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4c9vGq98eBoj+1ORFN7yt0TkrhP9UwbdfYumywIVI3puX0wkT0jMv3E/Bm7LJGwnmRo1h+BmAIQuPbTDCVzzDiZq8eBKRm5tcVzoqytN+2r5/ddrzcwIm8gsNiH+ZsOziT/AgxN8mr2KU13+tbydPdHxYYhuPtEOXru83RHhiZLU/Fj+NnCAl7K3wRUtlBWvPf4MWtvwgeqrm6h+p0TSDN1DuPluHTwAOFsYltbiUVkMDvfHLtgXB44OQ0n+zPcVmvac0riLqsoO/uQsTBFTMNzzm0zVVljmevQn0QtBL7iAcBmqzuKroqq5ISzK6UvnAjhX3SXDVYURaldV8b84OQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
California Digital Library
Description
The California Digital Library exists to support the University of California community’s pursuit of scholarship and to extend the University’s public service mission.
Final URL
https://cdlib.org/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://cdlib.org/
Version
3
Server
Apache/2.4.58 (Ubuntu)
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
cdlib-prd.web.cdlib.net
Valid from
2026-02-11T18:00:00-06:00
Valid until
2027-03-13T17:59:59-06:00
Days remaining
216
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

8 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
—
Cross-Origin-Embedder-PolicyNot detected
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
52.85.12.117, 52.85.12.129, 52.85.12.44, 52.85.12.90
119,42 ms
Cloudflare
1.1.1.1
52.85.12.117, 52.85.12.129, 52.85.12.44, 52.85.12.90
96,46 ms
Quad9
9.9.9.9
52.85.12.117, 52.85.12.129, 52.85.12.44, 52.85.12.90
67,37 ms
OpenDNS
208.67.222.222
52.85.12.117, 52.85.12.129, 52.85.12.44, 52.85.12.90
101,20 ms
AdGuard
94.140.14.14
108.157.150.122, 108.157.150.129, 108.157.150.41, 108.157.150.53
516,43 ms

IP, geolocation and ASNAssociated network information

108.157.150.53

Identified
success
Yes
country
United States
country_code
US
region
Missouri
city
Kansas City
latitude
39.0997285
longitude
-94.5785681
asn
16509
organization
Amazon.com, Inc.
isp
Amazon.com, Inc.
timezone
America/Chicago

108.157.150.129

No data
success
No
country
region
city
asn
organization
isp

108.157.150.41

No data
success
No
country
region
city
asn
organization
isp

108.157.150.122

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

cdlib-org.mail.protection.outlook.com

Port 25: Closed/unreachable - 25.4 ms - 
Port 465: Closed/unreachable - 4028.9 ms - 
Port 587: Closed/unreachable - 4021.3 ms -

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