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Total

DNS

100

Email

Security

Network

100

Availability

Domainsheffield.ac.uk

IPv41

IPv60

MX records5

StatusActive

Domain technical report

Home | The University of Sheffield

sheffield.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: 2026-08-09T01:31:16-05:00 · 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.

HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: sheffield.ac.uk

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)

1 aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
10 alt4.aspmx.l.google.com.

TXT

9 record(s)

"google-site-verification=UeOlua34rGuYEYg93SzgMHespVf9e1zfDiPd7O3xJJA"
"fastly-domain-delegation-nswth4upxeqnqveipseg-00624106-2026-03-04"
"successfactors-site-verification=NjRiOGZiYTRiNmU4MDQ1OWJmZjliM2IxNmQ0NDJmNWU5OThkZWM3NzRjMzNlMTdjOTZkM2VjYjhjMTVkODZmMg=="
"google-site-verification=58EFIopIAqD2iSA4Lo5PQGuys6Co_ojiogpJzH-Ht8E"
"google-site-verification=xecQmyR2UQAd3OiZbAW_FJHFJPwg8p8uX30nW4o6zOY"
"apple-domain-verification=8FCPtnPTCYc6gGWj"
"piktochart-site-verification=h5VvjYd6x5Po8IJe2DhIExBmUzA8SvCv2B32"
"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 ip4:46.249.61.0/24" " include:_spf.google.com include:wpm.flywire.com include:spf.mailanyone.net include:spf.mandrillapp.com include:shops.shopify.com -all"
"miro-verification=680d07755b726a339f00d8138d67241398cd5b07"

NS

3 record(s)

acheron.shef.ac.uk.
hippo.shef.ac.uk.
ns4.ja.net.

SOA

1 record(s)

hippo.shef.ac.uk. hostmaster.shef.ac.uk. 2025085895 3600 3600 1209600 600

CAA

9 record(s)

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

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 ip4:46.249.61.0/24 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

Server

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

*.sheffield.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

254,87 ms

Cloudflare

1.1.1.1

143.167.2.102

143,15 ms

Quad9

9.9.9.9

143.167.2.102

237,50 ms

OpenDNS

208.67.222.222

143.167.2.102

202,70 ms

AdGuard

94.140.14.14

143.167.2.102

268,02 ms

IP, geolocation and ASNAssociated network information

143.167.2.102

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

aspmx.l.google.com

Port 25: Closed/unreachable - 21.9 ms - 220 mx.google.com ESMTP 586e51a60fabf-459f20210b8si5693037fac.226 - gsmtp
Port 465: Closed/unreachable - 4020.9 ms - 
Port 587: Closed/unreachable - 4007.1 ms -

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