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74
Total
80
DNS
90
Email
69
Security
70
Network
60
Availability
Domaincrates.io
IPv44
IPv64
MX records2
StatusActive
Domain technical report

crates.io

crates.io

Generated: 2026-08-09T11:13:30-05:00 · Cached result

JSONCSVPDFVisit site
IPv44
IPv64
MX2
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

4 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 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.

✓
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

190 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
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/2 404

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

4 record(s)
151.101.194.137
151.101.2.137
151.101.130.137
151.101.66.137

AAAA

4 record(s)
2a04:4e42:600::649
2a04:4e42:400::649
2a04:4e42:200::649
2a04:4e42::649

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
10 mxb.mailgun.org.
10 mxa.mailgun.org.

TXT

1 record(s)
"v=spf1 include:mailgun.org ~all"

NS

4 record(s)
ns-817.awsdns-38.net.
ns-217.awsdns-27.com.
ns-1064.awsdns-05.org.
ns-1543.awsdns-00.co.uk.

SOA

1 record(s)
ns-1064.awsdns-05.org. 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:mailgun.org ~all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:dmarc-rua@rust-lang.org; fo=1; ruf=mailto:dmarc-rua@rust-lang.org

DKIM

Selector k1
k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+eQtAm5xohRQJCbwTQ8e27GhOdxji94CVOBXQtuiq75sEVu9nMImBiv8UOipvmiTFsM4Odnp7mIq8UeyPDpeUwtbPv9SYflEJt6o+Im5YOU/UnhEXqa1tXbpFrQSISVYz129G1SxGKMmxSBvyrjPNBJJOofqLHrIQrrdcgh5CywIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

No data
Title
Description
Final URL
https://crates.io/
HTTP status

HTTP

Status
HTTP/2 404
Final URL
https://crates.io/
Version
3
Server
Heroku
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
GlobalSign nv-sa
CN
crates.io
Valid from
2026-01-15T09:26:59-06:00
Valid until
2027-02-16T09:26:58-06:00
Days remaining
190
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

1 active
✓
HSTSImplemented
—
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
151.101.130.137, 151.101.194.137, 151.101.2.137, 151.101.66.137
74,62 ms
Cloudflare
1.1.1.1
151.101.130.137, 151.101.194.137, 151.101.2.137, 151.101.66.137
52,56 ms
Quad9
9.9.9.9
151.101.130.137, 151.101.194.137, 151.101.2.137, 151.101.66.137
129,49 ms
OpenDNS
208.67.222.222
151.101.130.137, 151.101.194.137, 151.101.2.137, 151.101.66.137
131,47 ms
AdGuard
94.140.14.14
151.101.130.137, 151.101.194.137, 151.101.2.137, 151.101.66.137
299,12 ms

IP, geolocation and ASNAssociated network information

151.101.194.137

No data
success
No
country
region
city
asn
organization
isp

151.101.2.137

No data
success
No
country
region
city
asn
organization
isp

151.101.130.137

No data
success
No
country
region
city
asn
organization
isp

151.101.66.137

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

mxb.mailgun.org

Port 25: Closed/unreachable - 9 ms - 
Port 465: Closed/unreachable - 4008.1 ms - 
Port 587: Closed/unreachable - 4003.5 ms -

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