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84
Total
75
DNS
100
Email
81
Security
50
Network
100
Availability
Domainshef.ac.uk
IPv41
IPv60
MX records5
StatusActive
Domain technical report

Home | The University of Sheffield

shef.ac.uk

A world-class university – a unique student experience. Sheffield is a research university in the Russell Group with a global reputation for excellence.

Generated: 2026-08-09T05:36:29-05:00 · Cached result

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IPv41
IPv60
MX5
NS3

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

3 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 propagation10 / 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-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

115 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: sheffield.ac.uk

i
IPv4 diversity20 / 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/1.1 200 OK

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
143.167.2.102

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
10 alt3.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt4.aspmx.l.google.com.

TXT

6 record(s)
"QuoVadis=b6b1f5bd-5729-453c-9950-107c31ff576a"
"apple-domain-verification=aQwUN0OnGdXEaFv7"
"fastly-domain-delegation-nswth4upxeqnqveipseg-00624106-2026-03-04"
"google-site-verification=isKsdLEuDlo36yj5mOEE565z5MSZ3ZToeKOK5ovSB0U"
"google-site-verification=xecQmyR2UQAd3OiZbAW_FJHFJPwg8p8uX30nW4o6zOY"
"v=spf1 ip4:143.167.0.0/16 ip4:95.172.88.0/22 ip4:130.88.36.5 ip4:80.93.168.194 ip4:85.92.81.226 ip4:146.177.26.90/31 ip4:146.177.26.108/31 ip4:81.17.56.1 ip4:94.23.120.168 ip4:149.56.182.220 ip4:35.242.247.107 ip4:34.107.8.58" " ip4:212.227.126.128/25 ip4:82.165.159.0/26 ip4:212.227.15.0/25 ip4:212.227.17.0/27 ip4:217.72.192.64/26 ip4:74.121.48.4 ip4:31.221.91.141 ip4:212.54.136.59 ip4:31.221.72.237 ip4:35.177.177.249 ip4:35.178.89.45" " ip4:50.56.130.220/30 ip4:207.97.204.96/29 ip4:146.20.14.104/30 ip4:164.177.132.168/30 ip4:35.234.108.85/32 ip4:34.90.200.156/32 ip4:35.204.47.209/32" " include:_spf.google.com include:wpm.flywire.com include:spf.mailanyone.net include:spf.mandrillapp.com include:shops.shopify.com -all"

NS

3 record(s)
hippo.shef.ac.uk.
ns4.ja.net.
acheron.shef.ac.uk.

SOA

1 record(s)
hippo.shef.ac.uk. hostmaster.shef.ac.uk. 2025592592 3600 3600 1209600 600

CAA

9 record(s)
0 issue "digicert.com"
0 issue "godaddy.com"
0 issue "pki.goog"
0 issuewild "letsencrypt.org"
0 issue "letsencrypt.org"
0 issuewild "sectigo.com"
0 issue "sectigo.com"
0 issue "amazon.com"
0 iodef "mailto:soc@sheffield.ac.uk"

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

1 record(s)
100 10 "s" "x-eduroam:radius.tls" "" _radsec._tcp.roaming.ja.net.

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 ip4:143.167.0.0/16 ip4:95.172.88.0/22 ip4:130.88.36.5 ip4:80.93.168.194 ip4:85.92.81.226 ip4:146.177.26.90/31 ip4:146.177.26.108/31 ip4:81.17.56.1 ip4:94.23.120.168 ip4:149.56.182.220 ip4:35.242.247.107 ip4:34.107.8.58 ip4:212.227.126.128/25 ip4:82.165.159.0/26 ip4:212.227.15.0/25 ip4:212.227.17.0/27 ip4:217.72.192.64/26 ip4:74.121.48.4 ip4:31.221.91.141 ip4:212.54.136.59 ip4:31.221.72.237 ip4:35.177.177.249 ip4:35.178.89.45 ip4:50.56.130.220/30 ip4:207.97.204.96/29 ip4:146.20.14.104/30 ip4:164.177.132.168/30 ip4:35.234.108.85/32 ip4:34.90.200.156/32 ip4:35.204.47.209/32 include:_spf.google.com include:wpm.flywire.com include:spf.mailanyone.net include:spf.mandrillapp.com include:shops.shopify.com -all

DMARC

Configured
v=DMARC1; p=reject; sp=quarantine; rua=mailto:dmarc-rua@dmarc.service.gov.uk,mailto:re+fgkd33bleer@dmarc.postmarkapp.com;

DKIM

Selector email
k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzFoFsos44gwS/jm0aee5miXqfkwrtNicyI9Nw34p60qNZZG9KX+0bmmfzjPRUgI393y35otSc65IGIbJJP3FAaUhBBix3QFR8L4IkIsE8vdM1whkqg3xFfgzXIHMUoehaCMDYFNlzwHl4rv9mT9iEWpcDkNhdpUWwRgc1Vl17Jbwb7Jit8Ajwhjrt9MRVxWZBnJLcEK+wAd5vaiu23ffrJEEweD4lS7sqF79ea9qnW0gfCyrQKuEpMghfy4njuQta9Qnu/77RpIA+PphChxlBuPM4NF1xRSRNR0CPaGgztYeabEOKxORbt1gIhTNsrWGlQC3hBetYHW47UH8KdBwPQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Home | The University of Sheffield
Description
A world-class university – a unique student experience. Sheffield is a research university in the Russell Group with a global reputation for excellence.
Final URL
https://sheffield.ac.uk/
HTTP status
206

HTTP

Status
HTTP/1.1 200 OK
Final URL
https://sheffield.ac.uk/
Version
2
Server
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Sectigo Limited
CN
*.shef.ac.uk
Valid from
2026-05-17T19:00:00-05:00
Valid until
2026-12-02T17:59:59-06:00
Days remaining
115
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

4 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
143.167.2.102
31,06 ms
Cloudflare
1.1.1.1
143.167.2.102
332,16 ms
Quad9
9.9.9.9
143.167.2.102
357,72 ms
OpenDNS
208.67.222.222
143.167.2.102
237,51 ms
AdGuard
94.140.14.14
143.167.2.102
287,84 ms

IP, geolocation and ASNAssociated network information

143.167.2.102

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

alt3.aspmx.l.google.com

Port 25: Closed/unreachable - 1.3 ms - 
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 4020.3 ms -

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