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80
Total
85
DNS
90
Email
77
Security
20
Network
100
Availability
Domainhaskell.org
IPv41
IPv60
MX records1
StatusActive
Domain technical report

Haskell Language

haskell.org

The Haskell purely functional programming language home page.

Generated: 2026-08-09T05:41:33-05:00 · Cached result

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IPv41
IPv60
MX1
NS2

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

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 policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 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

87 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

i
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/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
142.93.179.24

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 mail.haskell.org.

TXT

4 record(s)
"v=spf1 a mx a:mail.haskell.org ip4:145.40.80.253 ip4:23.253.242.70 ip4:147.75.194.125 ip4:145.40.99.54 ip4:145.40.80.253 ip6:2604:1380:0:8900::d ip6:2604:1380:4641:a100::5 ip6:2001:4800:7817:104:be76:4eff:fe04:f608 ip4:104.249.184.245 ~a" "ll"
"google-site-verification=1OM2DE3CNEzK7ZBMaf1zoHoqBNoNspb49QFCe95iFYI"
"_globalsign-domain-verification=HAV0DdFrnLUqX_rElt-qy46djfIXvl0vWWSpvmvNcE"
"google-site-verification=LnP94e_TscWrpSHj_Zwa8Y7eTzBiKatncQv4pFI_mtk"

NS

2 record(s)
lex.ns.cloudflare.com.
pola.ns.cloudflare.com.

SOA

1 record(s)
lex.ns.cloudflare.com. dns.cloudflare.com. 2411514997 10000 2400 604800 1800

CAA

0 record(s)
—

Not configured

DS

1 record(s)
2371 13 2 3A57EF458D5CE3639A8FAF867678A3D7D15C7DAB61191B37FE208C0B C5E75A4C

DNSKEY

2 record(s)
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==

RRSIG

2 record(s)
NS 13 2 86400 20260810114124 20260808094124 34505 haskell.org. Ldu2nuKfXHwkVAVSakEWSd1o+c7QHnHy6ZqjaG/RKvhF8beGC0KoUleN F1U5T7rDspiIV7J4yArlV3hZaHyVDQ==
DS 8 2 3600 20260822152352 20260801142352 44925 org. Qn7e/4iFdXkEN1gKWuKLbolrwpAqe4AgnEHagCD1bGPxl7DAmurYjUab Q0VkEHq09RtzGYWLoW/dzh/Am3s+e8/72TS5t7lcUt5BiKfGRUyqlP9M RhXghdvfA2Dl4NpvstBv2yWtyz6GQbpQ/SL5MyJQdjyAvO8dx9eZlqH9 ppc=

NSEC

1 record(s)
\000.haskell.org. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

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 a mx a:mail.haskell.org ip4:145.40.80.253 ip4:23.253.242.70 ip4:147.75.194.125 ip4:145.40.99.54 ip4:145.40.80.253 ip6:2604:1380:0:8900::d ip6:2604:1380:4641:a100::5 ip6:2001:4800:7817:104:be76:4eff:fe04:f608 ip4:104.249.184.245 ~all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:4b729e552bca.a@dmarcinput.com; ruf=mailto:4b729e552bca.f@dmarcinput.com; fo=1

DKIM

Selector mail
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwmkcfywfudk/FmAYHXtFhrAj/d6zprMsZOlmadejyW0QYdZYf3xMwCvXMgvgGSgp+d8+xwT/R3HwJa3y+krJQwEn6YQrn9h6GlnHBWIgc+A0tfR/e8pkS9puRQ39iZwBpEoAiX2A9jYkYXvgnq3KE/s3gpX+XQTqmCEvCGrI6awIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Haskell Language
Description
The Haskell purely functional programming language home page.
Final URL
https://www.haskell.org/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.haskell.org/
Version
3
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
www-origin.haskell.org
Valid from
2026-08-06T09:16:22-05:00
Valid until
2026-11-04T08:16:21-06:00
Days remaining
87
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

3 active
—
HSTSNot detected
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
—
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
142.93.179.24
47,25 ms
Cloudflare
1.1.1.1
142.93.179.24
20,72 ms
Quad9
9.9.9.9
142.93.179.24
25,73 ms
OpenDNS
208.67.222.222
142.93.179.24
29,68 ms
AdGuard
94.140.14.14
142.93.179.24
34,05 ms

IP, geolocation and ASNAssociated network information

142.93.179.24

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

mail.haskell.org

Port 25: Closed/unreachable - 3.2 ms - 
Port 465: Closed/unreachable - 4015 ms - 
Port 587: Closed/unreachable - 4021.9 ms -

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