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71
Total
40
DNS
45
Email
92
Security
85
Network
100
Availability
Domaincalendar.google.com
IPv41
IPv61
MX records3
StatusActive
Domain technical report

Google Calendar - Sign in to Access & Edit Your Schedule

calendar.google.com

Access Google Calendar with a Google account (for personal use) or Google Workspace account (for business use).

Generated: 2026-08-08T17:26:28-05:00 · Cached result

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IPv41
IPv61
MX3
NS0

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

!
Name server redundancy0 / 20 pts · Dns

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

!
SOA record0 / 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

3 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

!
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

64 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers27 / 35 pts · Security

7 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: ncorda-ao-in-f14.1e100.net

i
IPv4 diversity20 / 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

1 record(s)
142.251.214.78

AAAA

1 record(s)
2607:f8b0:4009:81e::200e

CNAME

0 record(s)
—

Not configured

MX

3 record(s)
10 alt1.gmr-smtp-in.l.google.com.
5 gmr-smtp-in.l.google.com.
10 alt2.gmr-smtp-in.l.google.com.

TXT

1 record(s)
"v=spf1 redirect=_spf.google.com"

NS

0 record(s)
—

Not configured

SOA

0 record(s)
—

Not configured

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 redirect=_spf.google.com

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Google Calendar - Sign in to Access & Edit Your Schedule
Description
Access Google Calendar with a Google account (for personal use) or Google Workspace account (for business use).
Final URL
https://accounts.google.com/v3/signin/identifier?continue=https://calendar.google.com/calendar/u/0/r&emr=1&followup=https://calendar.google.com/calendar/u/0/r&osid=1&passive=1209600&service=cl&flowName=WebLiteSignIn&flowEntry=ServiceLogin&dsh=S-838607476:1786227988465343
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://accounts.google.com/v3/signin/identifier?continue=https%3A%2F%2Fcalendar.google.com%2Fcalendar%2Fu%2F0%2Fr&dsh=S201443857%3A1786227979841191&emr=1&followup=https%3A%2F%2Fcalendar.google.com%2Fcalendar%2Fu%2F0%2Fr&osid=1&passive=1209600&service=cl&flowName=WebLiteSignIn&flowEntry=ServiceLogin&ifkv=Ac50bxvCF1AC1Pp_hO_oypqEGP0b1oo6iTPONrXNca1nqL_xRfMwTvmDbrMseiNy1Z2ps7k_hvdYAw
Version
3
Server
ESF
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
*.google.com
Valid from
2026-07-20T13:05:56-05:00
Valid until
2026-10-12T13:05:55-05:00
Days remaining
64
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

7 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
—
Cross-Origin-Embedder-PolicyNot detected
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
142.251.215.142
36,47 ms
Cloudflare
1.1.1.1
172.253.149.100, 172.253.149.101, 172.253.149.102, 172.253.149.113, 172.253.149.138, 172.253.149.139
18,77 ms
Quad9
9.9.9.9
142.251.211.14
23,75 ms
OpenDNS
208.67.222.222
142.251.215.142
70,52 ms
AdGuard
94.140.14.14
142.251.34.238
67,80 ms

IP, geolocation and ASNAssociated network information

142.251.214.78

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

alt1.gmr-smtp-in.l.google.com

Port 25: Closed/unreachable - 23.8 ms - 
Port 465: Closed/unreachable - 4037.1 ms - 
Port 587: Closed/unreachable - 4042.4 ms -

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