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84
Total
75
DNS
90
Email
69
Security
100
Network
100
Availability
Domainsemanticscholar.org
IPv44
IPv68
MX records5
StatusActive
Domain technical report

Semantic Scholar | AI-Powered Research Tool

semanticscholar.org

Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.

Generated: 2026-08-08T18:58:49-05:00 · Cached result

IPv44
IPv68
MX5
NS4

DiagnosticsMain findings and recommendations

IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

IPv6 (AAAA)10 / 10 pts · Dns

8 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 policy5 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

MX records20 / 20 pts · Mail

5 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

180 day(s) remaining.

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

PTR reverse DNS30 / 30 pts · Network

PTR: server-3-170-51-46.cmh68.r.cloudfront.net

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

HTTP response40 / 40 pts · Availability

HTTP/1.1 200 OK

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

4 record(s)
3.170.51.46
3.170.51.22
3.170.51.109
3.170.51.5

AAAA

8 record(s)
2600:9000:288b:5200:6:4565:580:93a1
2600:9000:288b:d400:6:4565:580:93a1
2600:9000:288b:4a00:6:4565:580:93a1
2600:9000:288b:fc00:6:4565:580:93a1
2600:9000:288b:8200:6:4565:580:93a1
2600:9000:288b:200:6:4565:580:93a1
2600:9000:288b:7c00:6:4565:580:93a1
2600:9000:288b:c600:6:4565:580:93a1

CNAME

0 record(s)

Not configured

MX

5 record(s)
10 aspmx2.googlemail.com.
10 aspmx3.googlemail.com.
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
1 aspmx.l.google.com.

TXT

2 record(s)
"google-site-verification=XQD87lq7o-ceBjMa_bB7iZ-VbQAElBnOjnDXpRQOWf0"
"v=spf1 include:_spf.google.com a mx ip4:52.10.131.143 a mx ip4:52.11.211.149 ip4:35.160.27.221 ip4:54.149.223.60 include:5910970.spf08.hubspotemail.net include:mg-spf.greenhouse.io ~all"

NS

4 record(s)
ns-1437.awsdns-51.org.
ns-290.awsdns-36.com.
ns-586.awsdns-09.net.
ns-1772.awsdns-29.co.uk.

SOA

1 record(s)
ns-586.awsdns-09.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

8 record(s)
0 issue "digicert.com"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "amazon.com"
0 issuewild "letsencrypt.org"
0 issuewild "digicert.com"
0 issue "letsencrypt.org"
0 issue "amazon.com"

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.google.com a mx ip4:52.10.131.143 a mx ip4:52.11.211.149 ip4:35.160.27.221 ip4:54.149.223.60 include:5910970.spf08.hubspotemail.net include:mg-spf.greenhouse.io ~all

DMARC

Configured
v=DMARC1; p=reject; pct=100; rua=mailto:re+gr0yylpvy9w@dmarc.postmarkapp.com; sp=none; aspf=r;

DKIM

Selector google
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCTQgLZqcpzYI7MT0jne/8OZQn5WXq3v2/6Q7x+Dw2ZenIP1zqBJZ8jSj79HdNNPFYCSTTEZCo3DERT7K9UEvByGFiSKZK6gGZI2+nEreWk0qn+Sgr3Xj66uidGd4lEXGnOiuweiOsIVy1WG03lTWmCX8W78GypnlZr0phJgmsNYwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Semantic Scholar | AI-Powered Research Tool
Description
Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.
Final URL
https://www.semanticscholar.org/
HTTP status
200

HTTP

Status
HTTP/1.1 200 OK
Final URL
https://www.semanticscholar.org/
Version
2
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
*.semanticscholar.org
Valid from
2026-01-06T18:00:00-06:00
Valid until
2027-02-04T17:59:59-06:00
Days remaining
180
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

1 active
HSTSNot detected
Content Security PolicyNot detected
X-Content-Type-OptionsNot detected
X-Frame-OptionsImplemented
Referrer PolicyNot detected
Permissions PolicyNot detected
Cross-Origin-Opener-PolicyNot detected
Cross-Origin-Embedder-PolicyNot detected
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
52.84.127.33, 52.84.127.40, 52.84.127.5, 52.84.127.53
67,94 ms
Cloudflare
1.1.1.1
3.170.185.126, 3.170.185.129, 3.170.185.83, 3.170.185.92
34,90 ms
Quad9
9.9.9.9
3.170.185.126, 3.170.185.129, 3.170.185.83, 3.170.185.92
190,15 ms
OpenDNS
208.67.222.222
52.84.127.33, 52.84.127.40, 52.84.127.5, 52.84.127.53
99,80 ms
AdGuard
94.140.14.14
54.192.100.33, 54.192.100.47, 54.192.100.86, 54.192.100.9
309,65 ms

IP, geolocation and ASNAssociated network information

3.170.51.46

No data
success
No
country
region
city
asn
organization
isp

3.170.51.22

No data
success
No
country
region
city
asn
organization
isp

3.170.51.109

No data
success
No
country
region
city
asn
organization
isp

3.170.51.5

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

aspmx2.googlemail.com

Port 25: Closed/unreachable - 1.1 ms - 
Port 465: Closed/unreachable - 4021.2 ms - 
Port 587: Closed/unreachable - 4021.1 ms -

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