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84
Total
60
DNS
100
Email
88
Security
65
Network
100
Availability
Domainhmrc.gov.uk
IPv44
IPv60
MX records1
StatusActive
Domain technical report

HM Revenue & Customs - GOV.UK

hmrc.gov.uk

HMRC is the UK’s tax, payments and customs authority, and we have a vital purpose: we collect the money that pays for the UK’s public services, help families and individuals with targeted financial support and provide the property valuations that support taxation and benefits. We do this by being impartial and increasingly effective and efficient in our administration. We help the honest majority to get their tax right and make it hard for the dishonest minority to cheat the system. HMRC is a non-ministerial department, supported by 1 public body .

Generated: 2026-08-09T23:52:03-05:00 · Cached result

JSONCSVPDFVisit site
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-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

134 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers23 / 35 pts · Security

6 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-3-170-51-81.cmh68.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)
3.170.51.81
3.170.51.108
3.170.51.116
3.170.51.92

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 hmrc-gov-uk.mail.protection.outlook.com.

TXT

19 record(s)
"MS=ms28763629"
"msfpkey=4kbut54mlakacryhy364cwl3i"
"apple-domain-verification=k5vwo0gSV3ATZe72"
"have-i-been-pwned-verification=1acbd0738aa212c04a4c8707ac629623"
"_wacel79i0a5biokt2e235dqnnzazvn0"
"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"
"_widga9vksj13aufol0fr532l100sh6h"
"_yffukeq36ilt4li62rgbnctixnwl68l"
"atlassian-domain-verification=lBD1YrVbZj1EjN6ffBPRgTP9qzOPkUAOuK3NNRWYelejqNDTROsfcJIEwu0kQGs2"
"OSSRH-63967"
"adobe-idp-site-verification=f31528e5dbb46651f643dde6da6210fcb677727aa0dcc8c69dd8f3b6d22fb2b9"
"_dg750iinnrnuctkt5emybzejc9s8klu"
"fMr+/rnpA45oFxuhUCJbZnDl8KE6OTIOPUpWdREzbr+zEuZArh6lQQdiRd1cb2Z3SzZPFzYmgJ/PB8e5IVfGOg=="
"_932qsb1broz8i3l2nij8vq29rpizyj1"
"google-site-verification=gxQZPx50G8LcGYYoA3yD0lnPdqY796vjd-KbmHzKaWY"
"flexera-domain-verification-vrljxxjepiimpyfa"
"atlassian-sending-domain-verification=def9e524-dd0e-492f-bb5c-89096c032d5d"
"_x5tfrbvxocbwc9izpxvs7ncy0k25d4v"
"Dynatrace-site-verification=4279ea94-37fc-4fec-a218-497a44d24ead__l6gq98me8f2eais4top3sd37i0"

NS

4 record(s)
ns-343.awsdns-42.com.
ns-1614.awsdns-09.co.uk.
ns-1301.awsdns-34.org.
ns-525.awsdns-01.net.

SOA

1 record(s)
ns-525.awsdns-01.net. 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:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all

DMARC

Configured
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com,mailto:Dmarc.Aggregate@hmrc.gov.uk,mailto:dmarc-rua@dmarc.service.gov.uk; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com,mailto:Dmarc.Forensics@hmrc.gov.uk;

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC/BcIdU4W7oPsbf3LCYZ4/fVfO5s3g/a9HcGK+xYLe3fAnFxuaunUL1JQ0MmO6fJnIprYw8NeoX7c/rkoBhrA0FUkRFow1inVfv68MzMnjj9MC8WGMbon7U/0lbUYnZ8bFvt6+3zQuklGF9lV7lDOIFMH308T2PAOZz73FL7kPmwIDAQAB; n=1024,1487509177,1503147577

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
HM Revenue & Customs - GOV.UK
Description
HMRC is the UK’s tax, payments and customs authority, and we have a vital purpose: we collect the money that pays for the UK’s public services, help families and individuals with targeted financial support and provide the property valuations that support taxation and benefits. We do this by being impartial and increasingly effective and efficient in our administration. We help the honest majority to get their tax right and make it hard for the dishonest minority to cheat the system. HMRC is a non-ministerial department, supported by 1 public body .
Final URL
https://www.gov.uk/government/organisations/hm-revenue-customs
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://www.gov.uk/government/organisations/hm-revenue-customs
Version
3
Server
nginx
X-Powered-By
ASP.NET

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
cname-hmrc-gov-uk.production.tax.service.gov.uk
Valid from
2025-11-22T18:00:00-06:00
Valid until
2026-12-22T17:59:59-06:00
Days remaining
134
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

6 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
—
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
13.225.47.112, 13.225.47.120, 13.225.47.17, 13.225.47.89
66,98 ms
Cloudflare
1.1.1.1
13.225.47.112, 13.225.47.120, 13.225.47.17, 13.225.47.89
46,07 ms
Quad9
9.9.9.9
13.225.47.112, 13.225.47.120, 13.225.47.17, 13.225.47.89
42,16 ms
OpenDNS
208.67.222.222
13.225.47.112, 13.225.47.120, 13.225.47.17, 13.225.47.89
33,14 ms
AdGuard
94.140.14.14
54.192.100.118, 54.192.100.45, 54.192.100.68, 54.192.100.97
66,12 ms

IP, geolocation and ASNAssociated network information

3.170.51.81

No data
success
No
country
region
city
asn
organization
isp

3.170.51.108

No data
success
No
country
region
city
asn
organization
isp

3.170.51.116

No data
success
No
country
region
city
asn
organization
isp

3.170.51.92

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

hmrc-gov-uk.mail.protection.outlook.com

Port 25: Closed/unreachable - 22.2 ms - 
Port 465: Closed/unreachable - 4052.1 ms - 
Port 587: Closed/unreachable - 4031.3 ms -

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