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84
Total
90
DNS
70
Email
81
Security
65
Network
100
Availability
Domainslack.com
IPv44
IPv60
MX records5
StatusActive
Domain technical report

Slack | AI Work Platform & Productivity Tools

slack.com

Boost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.

Generated: 2026-08-08T18:16:12-05:00 · Cached result

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IPv44
IPv60
MX5
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 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

5 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

87 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: ec2-18-169-61-189.eu-west-2.compute.amazonaws.com

✓
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)
18.169.61.189
18.134.215.41
18.169.120.191
18.168.172.238

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
10 aspmx3.googlemail.com.
10 aspmx2.googlemail.com.
1 aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.

TXT

12 record(s)
"spycloud-domain-verification=02e4c0be-cf43-44e4-beaf-4f99702ca632"
"google-site-verification=efuXt5-oMr2CdNmVi6A9IO29KMKifpseD1qokxjWwcE"
"google-site-verification=v-LLB__IhraaI7ZzuE3jvRFIm2vERPLzWoepAEZJtKQ"
"google-site-verification=kB1KvgpSk9YkHsFmsj1VPI5YmDvfKctPxnplhGjyqtE"
"google-site-verification=2PK67oVPNyEtS1avSlr3PhH5nSiFuticbQv_bT4pM2k"
"google-site-verification=o2grd1TLmZZ8GrqbhVIFtzO2MRLTtSUpBBIBYfhQVCQ"
"_0vidyxobp6x350odqhb4fo7fdxhmtq3"
"hubspot-developer-verification=OTE4NzYxYTgtMDUwZi00MzgzLTk2YTUtZDAwNjBlODg1MWM0"
"v=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -all"
"google-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mk"
"google-site-verification=QvelFPjIOe3Vavw0q-aAVYaAPKmWCRjmmVVEAjgfjQc"
"OSSRH-54733"

NS

4 record(s)
ns-1901.awsdns-45.co.uk.
ns-1493.awsdns-58.org.
ns-166.awsdns-20.com.
ns-606.awsdns-11.net.

SOA

1 record(s)
ns-1493.awsdns-58.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300

CAA

3 record(s)
0 iodef "mailto:hostmaster@slack-corp.com"
0 issue "digicert.com; account=455b15ed272bed097725c6ea50e89921fc57379c5338a29305c05771df65fff1"
0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1532134906"

DS

1 record(s)
296 13 2 601D7EC07E7DEE6E1AB6A3E5B2DA170F8353375FEA63AF2B732FAA5A 22898EA0

DNSKEY

3 record(s)
256 3 13 P/Hsnb0J0nqOTFMO0dOnrnsnJWV2cydk9qDu44N7tusPRaRPxpgAyw2o z9TAYp/S/mmzZ6lFARRZ7fPdNw7bHw==
256 3 13 AqmgPgPFaJ3d2JcFirBeGSoSC1OwGK32/9T8TxUCmJ/66Ll0ICwHZrkS +irf9lLT+rprsHTieLknV6oOV2ckLw==
257 3 13 yEle+c4KxMSOtdzZSLZ5CPduOhcE/l2nrAguCwDCP8iZPEhF/HDaMX76 iMBsA7PLNdGyOtw/i8IHH5QYfucdEw==

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.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -all

DMARC

Configured
v=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:dmarc_agg@vali.email,mailto:0e5a5c34@inbox.ondmarc.com;ruf=mailto:0e5a5c34@inbox.ondmarc.com

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Slack | AI Work Platform & Productivity Tools
Description
Boost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.
Final URL
https://slack.com/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://slack.com/
Version
3
Server
Apache
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
slack.com
Valid from
2026-08-06T04:33:39-05:00
Valid until
2026-11-04T03:33:38-06:00
Days remaining
87
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
—
Permissions PolicyNot detected
✓
Cross-Origin-Opener-PolicyImplemented
—
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
18.216.36.190, 18.221.229.81, 3.129.123.235, 3.130.95.182, 3.134.44.134, 3.142.111.40, 3.143.19.65, 3.143.53.1, 3.22.139.176
67,30 ms
Cloudflare
1.1.1.1
18.216.36.190, 18.221.229.81, 3.129.123.235, 3.130.95.182, 3.134.44.134, 3.142.111.40, 3.143.19.65, 3.143.53.1, 3.22.139.176
37,65 ms
Quad9
9.9.9.9
18.216.36.190, 18.221.229.81, 3.129.123.235, 3.130.95.182, 3.134.44.134, 3.142.111.40, 3.143.19.65, 3.143.53.1, 3.22.139.176
35,80 ms
OpenDNS
208.67.222.222
18.216.36.190, 18.221.229.81, 3.129.123.235, 3.130.95.182, 3.134.44.134, 3.142.111.40, 3.143.19.65, 3.143.53.1, 3.22.139.176
34,90 ms
AdGuard
94.140.14.14
18.216.36.190, 18.221.229.81, 3.129.123.235, 3.130.95.182, 3.134.44.134, 3.142.111.40, 3.143.19.65, 3.143.53.1, 3.22.139.176
48,96 ms

IP, geolocation and ASNAssociated network information

18.169.61.189

No data
success
No
country
region
city
asn
organization
isp

18.134.215.41

No data
success
No
country
region
city
asn
organization
isp

18.169.120.191

No data
success
No
country
region
city
asn
organization
isp

18.168.172.238

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

aspmx3.googlemail.com

Port 25: Closed/unreachable - 0.9 ms - 
Port 465: Closed/unreachable - 4011.8 ms - 
Port 587: Closed/unreachable - 4008.9 ms -

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