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Total

100

DNS

Email

Security

100

Network

100

Availability

Domainseznam.cz

IPv42

IPv62

MX records2

StatusActive

Domain technical report

Seznam – najdu tam, co neznám

seznam.cz

Nejnavštěvovanější český internetový portál nabízející vyhledávač, e-mail, aktuální zprávy, předpověď počasí a odkazy, které se mohou hodit.

Generated: 2026-08-09T09:51:24-05:00 · Cached result

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IPv42

IPv62

MX2

NS2

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

2 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓

CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

81 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: www.seznam.cz

✓

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/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

77.75.79.222
77.75.77.222

AAAA

2 record(s)

2a02:598:2::1222
2a02:598:a::79:222

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

20 mx2.seznam.cz.
10 mx1.seznam.cz.

TXT

6 record(s)

"facebook-domain-verification=hp0jkbs2ikx5c9hv3r0cwcyvi2c2jm"
"google-site-verification=v2WaAYaKuekbWHJu29R0b1IbBY2-pInEXYWbh_1_V2M"
"google-site-verification=a9t5IHxxjmCtKh9OOuqIGQBo1JUNQC1eEzhCY7x2Lts"
"v=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all"
"google-site-verification=e3xWgDmkjVzej4PsMZgvtPhUiJLFAK5rdx-zdmeBYjg"
"yahoo-verification-key=rIVkIfpCmZr9Wlk/ixIMiDw3Gdv8aIr0gxXkfzWe6+Y="

NS

2 record(s)

ans.seznam.cz.
ams.seznam.cz.

SOA

1 record(s)

ans.seznam.cz. hostmaster.seznam.cz. 1786095797 900 300 604800 300

CAA

2 record(s)

0 iodef "mailto:abuse-caa@firma.seznam.cz"
0 issue "letsencrypt.org;validationmethods=dns-01"

DS

1 record(s)

36559 13 2 EDD006D3969D20767E5181ADFE925B4B1567EC4ACED875D33B86F72E 96174A84

DNSKEY

2 record(s)

257 3 13 4RjTqRW4rtz/sJ8Doo44NqGOoB8RirxCI4Qo9sAvZFOt71Am6E0d9YSF KfDcIHQSNyMonv8gD/3L/Q8xVM51mQ==
256 3 13 rIioqGPkl3uQ+QM7S4n+PBSyWmAl7F3dJBq4JA0jzM5T8qhrHYLCHOWX faXzPSPOEOxC/Bb9ha45DJa/EkxD9w==

RRSIG

7 record(s)

SOA 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. Dp3exkrhwE2j+tUem3xnGlbYlSMxghZCeBKl6rFGJCuVlQ0twP4fcxwl oGCn/9iAADVtTcAzFLivcyM+mefnwg==
NS 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. tdaf7H/mGurlWY0dtuRP1FEYtlRt2MDhMoWlKWTrx0hUHAe8z2LZaPvX ApTjTgsEmDBIo2++Oklzx9nAXzsfhg==
AAAA 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. 8r+QXX8TKaqNVRpOt0Sxun8BnUPBfqh0YFZRbEls8WX9E7gHYy+i9v9i WYV6xx+rO/54HkD0okQXNngZfw04jQ==
A 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. hSfDIzsIbgK6/IGwurCikHGt13p20dcYzZ6DU9Krz0sBwkGOIRhXfIJH +f/Ya1m37TYyg4NIOzod84X3LrDlcQ==
MX 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. w3H+1qez4c3qalv+l7zhdj0sGrwNo23MHzoLp7PdL0+10nbWr4TAPi6k CASd+5J4NxvSdDf1Q6scBRK+ZSkdVA==
DS 13 2 3600 20260823054724 20260809041724 5166 cz. shnt4Ud0mn3dUMGfC5BjHWbvG5eQ7xnB3cqaiLO4AWnObRU+TOADUNwJ dP5/T9FlY9tYxETXAl0ZTU0O64M17g==
CAA 13 2 3600 20260820000000 20260730000000 18575 seznam.cz. TnoTaZ5cUE588Bd49IaoRJFHNd2CAz+jKYxvSc213q+XrdwJWg8ufsTo Ugt43SUmQ73MaP0ftrpoOS+qMlasEw==

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 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all

DMARC

Configured

v=DMARC1; p=none; sp=reject; rua=mailto:abuse@seznam.cz

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Seznam – najdu tam, co neznám

Description

Nejnavštěvovanější český internetový portál nabízející vyhledávač, e-mail, aktuální zprávy, předpověď počasí a odkazy, které se mohou hodit.

Final URL

https://www.seznam.cz/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.seznam.cz/

Version

Server

envoy

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

www.seznam.cz

Valid from

2026-08-01T05:04:07-05:00

Valid until

2026-10-30T05:04:06-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

3 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

—

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

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

77.75.77.222, 77.75.79.222

46,11 ms

Cloudflare

1.1.1.1

77.75.77.222, 77.75.79.222

140,82 ms

Quad9

9.9.9.9

77.75.77.222, 77.75.79.222

181,07 ms

OpenDNS

208.67.222.222

77.75.77.222, 77.75.79.222

353,00 ms

AdGuard

94.140.14.14

77.75.77.222, 77.75.79.222

160,67 ms

IP, geolocation and ASNAssociated network information

77.75.79.222

No data

success

country

region

city

asn

organization

isp

77.75.77.222

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

mx2.seznam.cz

Port 25: Closed/unreachable - 1.2 ms - 
Port 465: Closed/unreachable - 127.9 ms - 
Port 587: Closed/unreachable - 4020.7 ms -

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