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74
Total
70
DNS
90
Email
65
Security
100
Network
60
Availability
Domainthomascook.com
IPv42
IPv62
MX records1
StatusActive
Domain technical report

Thomas Cook | Holidays 2026 / 2027 | Deposits from £19pp

thomascook.com

Thomas Cook Holidays for 2026 & 2027. Book your perfect package holiday or city break deal with ATOL protection and low £19pp deposits.

Generated: 2026-08-10T22:10:44-05:00 · Cached result

JSONCSVPDFVisit site
IPv42
IPv62
MX1
NS6

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

6 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

85 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: a23-200-156-20.deploy.static.akamaitechnologies.com

✓
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 response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
23.200.156.20
23.200.156.18

AAAA

2 record(s)
2600:1407:7400:5f::17d1:5ee8
2600:1407:7400:5f::17d1:5ee9

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 smtp.google.com.

TXT

22 record(s)
"MS=ms66373475"
"k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCjvLoSGaQ+tjM7bSmC7tI9xGsRRnlYYb3YYDXe1u7BOKATPJCGZ5PDf4StR17ZzDN6AHcSOfUqeivwrEFPqyEaw/FMZEzv9dzomom/vgWAlT55qUtNnF09nR2VfelM1G0UVNqmrTipUaweS1zp50xjuT92DgpIw61r9rdRYLFbMQIDAQAB"
"d2lahvjt5jne9i.cloudfront.net"
"tiktok-developers-site-verification=7ZG6wbtQMvdzzbcl6Hx3QpRc34dxCHSb"
"QHgvdWsw9IqK0KvghOqDA1I0xZo6YQbkCVneDLOdC8M="
"rkddbrqyjkh4yvbkqm5ktgc5x1jcplky"
"28hnvb6q65y8s73x5dj5hrxw9hl5qcjs"
"mojecertpl-site-verification-h12rseN6efFoJK2BD7Tu34Ckxinx4DLH"
"v=spf1 include:spf.protection.outlook.com include:spf.ssmx.net include:_spf.emaillabs.net.pl include:_spf.google.com -all"
"anthropic-domain-verification-28263z=FaODbDdLZDgVVwotzvhbVLFil"
"4lbun0lc0dmjgk0ol0bb5flrnh"
"google-site-verification=PlZ7YgC-vitseHxngj-NYfEmtkyWumafgaYxdnIZjKQ"
"MS=ms41797821"
"MS=ms31863047"
"google-site-verification=nTZ6a_PjfJJjx-i-1sd02hrZKW5esJE2f0601eb2ic0"
"facebook-domain-verification=wv3jccfml3cs4meumrlx2ifi0exxyg"
"notion-domain-verification=HmQn7QgHWuUcGUSFjRF3zb66rKUIGBGBRY3ZMTE2oJM"
"pardot269772=1d6edbd85f7090b566a705e85d99f7d532bd340e860f5d19d34735e3d6970441"
"MS=ms41831275"
"vd9a15edu1jbbm4lqd8kkr6na1"
"ubsiidq08v8fdtv22qriake821"
"MS=ms53147880"

NS

6 record(s)
a6-66.akam.net.
a5-65.akam.net.
a1-156.akam.net.
a24-67.akam.net.
a7-67.akam.net.
a4-64.akam.net.

SOA

1 record(s)
a1-156.akam.net. a24-67.akam.net. 2024092938 3600 600 604800 300

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.ssmx.net include:_spf.emaillabs.net.pl include:_spf.google.com -all

DMARC

Configured
v=DMARC1;p=quarantine;rua=mailto:3f16f52397@rua.easydmarc.eu,mailto:dmarcchecksuk@thomascook.com;ruf=mailto:3f16f52397@ruf.easydmarc.eu,mailto:dmarcchecksuk@thomascook.com;fo=0:1:d:s;

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAm3Xbek+FLudym69YCdaASG+WjPsSnSlVstUhBsgpfVXyRU8ts5TzgvjhwXrdyn76xuDfP0rK+X8Gbm/wNNEA/VLnvrqwSSfZaT/yNizVPJ7d8+Awa8Lqm9BYwNsww/zigACevRQejsydsP2vNDbmJjf5C+54DTrhsO/+7fDwbtb/ZfStfRHi+tav2HHaQ6KiuRyOoPwRoP8CA3Yfel/m/lxA4ahsB9LJgFfyVftOU/ZLRnMjFmzS1k1MljY9j65jEZdt1lOoG0O1mVYktwNIhfjHjY2U0Eb/40OnLs07TinSxMl7nU9xmdNXX5t2g1oA8WFjjZIAgRMyyaPiUhrppQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Thomas Cook | Holidays 2026 / 2027 | Deposits from £19pp
Description
Thomas Cook Holidays for 2026 & 2027. Book your perfect package holiday or city break deal with ATOL protection and low £19pp deposits.
Final URL
https://www.thomascook.com/
HTTP status
206

HTTP

Status
HTTP/2 403
Final URL
https://www.thomascook.com/
Version
3
Server
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
www.thomascook.com
Valid from
2026-08-06T08:37:00-05:00
Valid until
2026-11-04T07:36:59-06:00
Days remaining
85
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

0 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
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
23.213.186.197, 23.213.186.206
69,06 ms
Cloudflare
1.1.1.1
23.213.53.44, 23.213.53.78
59,22 ms
Quad9
9.9.9.9
23.211.127.10, 23.211.127.41
56,00 ms
OpenDNS
208.67.222.222
23.213.186.197, 23.213.186.206
31,26 ms
AdGuard
94.140.14.14
23.206.172.65, 23.206.172.69
57,59 ms

IP, geolocation and ASNAssociated network information

23.200.156.20

No data
success
No
country
region
city
asn
organization
isp

23.200.156.18

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

smtp.google.com

Port 25: Closed/unreachable - 44.2 ms - 220 mx.google.com ESMTP 5614622812f47-4b1af810383si6733545b6e.120 - gsmtp
Port 465: Closed/unreachable - 4007.4 ms - 
Port 587: Closed/unreachable - 4021.2 ms -

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