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85
Total
75
DNS
90
Email
84
Security
65
Network
100
Availability
Domaindonotcall.gov
IPv44
IPv60
MX records1
StatusActive
Domain technical report

National Do Not Call Registry

donotcall.gov

Register your phone number to report stop or block unwanted, annoying,telemarketing, spam calls, robocalls to the FTC

Generated: 2026-08-10T05:00:37-05:00 · Cached result

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IPv44
IPv60
MX1
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 policy0 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 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

73 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-18-172-122-27.ord56.r.cloudfront.net

✓
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)
18.172.122.27
18.172.122.5
18.172.122.36
18.172.122.31

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 donotcall-gov.mail.protection.outlook.com.

TXT

5 record(s)
"_9qjafu7fsdip6ojnot6wp5e1h5yeh3l"
"9z2k5p98pzd49nrnk2rt80vjf5nlz5gw"
"MS=ms37632868"
"_e28kl860icrecgq3phq0sy8p6q6drdf"
"v=spf1 ip4:205.130.212.0/23 ip4:207.123.150.0/24 ip4:207.123.152.0/24 ip6:2001:1900:2268::/47 ip4:34.204.247.90 ip4:34.206.93.229 ip4:35.163.160.186 ip4:35.162.81.16 include:spf.protection.outlook.com -all"

NS

4 record(s)
ns-832.awsdns-40.net.
ns-1183.awsdns-19.org.
ns-1986.awsdns-56.co.uk.
ns-16.awsdns-02.com.

SOA

1 record(s)
ns-1986.awsdns-56.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)
—

Not configured

DS

2 record(s)
49773 13 2 21CD0AD6B7AAC569C7FE390E54CAF676C222E08C04EDCCBF87DF76CB 3B58FAFD
49773 13 1 9FF9CA2F09DF9AA52858D70E2AAEE5F727D3C73B

DNSKEY

3 record(s)
257 3 13 AjuyAOvUPl6rXCcf+377NdXM824IYwCPGNwv1f0V3tyvgi0QAoQpvkpG hdAcUCElJB/WvZ8wxkmpWPRbllR1LA==
256 3 13 HSRMnjtE2QW+l/cfpgkU9SRwbFPVqaHSTGb6kusrAckhH/K/y4jlHY3n EFQgNo+jRnq5r6XBkZPNZ6TSvRNQ8w==
256 3 13 hVHaiCwiPNq9f1jzAsE1d8ZO1CeIto28GQfJBkVBmqMSQgg9iHLmoLqe REWMJ/OK5PjylyU/xoVKrDjR+muVtA==

RRSIG

5 record(s)
DNSKEY 13 2 3600 20260810180000 20260810070000 49773 donotcall.gov. /qVj84bBRqQvDo8br+0npvbDfZq9Ys/V6YJXtVGq+Z45ABmlWPFdVnY/ LiUGJpR5QPluQJwsUKsaApgGI+/5ow==
NS 13 2 172800 20260812110027 20260810090027 28040 donotcall.gov. VCIoqDy6AM39wCqCaHIZykgAtn7bqF/aioisU2GK9jXa8WPqpAsaiD4/ rdcPiWPaCIu46g2yKxgulyw61iWP0g==
MX 13 2 900 20260810111527 20260810090027 28040 donotcall.gov. cC/Ab1Lxp+lVm1mCXpCP55V1VBygkveZkTsMJNmuMW/6rrlE+QrnA6lZ gw1ZJK3wmDAJkBdNaQSwu6+AUL58IA==
A 13 2 60 20260810110127 20260810090027 28040 donotcall.gov. fhRf5NJsQEozYWEmJ8b8iflxK36TY7c/mzJxjSdQAZBGp7Tlz952LU0k 5VhzKkZPB6RDZiKrkY9/3gZ2kqqwaQ==
DS 13 2 3600 20260811110027 20260809090027 35496 gov. vabtxgn0/M4fYlLDHyhxaoihXhW8zA7hJfM69JdHs/LHlVKBCgtNpwi0 CwT8v1/HuGrkUMaBfaaavNpK0Zi3fQ==

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 ip4:205.130.212.0/23 ip4:207.123.150.0/24 ip4:207.123.152.0/24 ip6:2001:1900:2268::/47 ip4:34.204.247.90 ip4:34.206.93.229 ip4:35.163.160.186 ip4:35.162.81.16 include:spf.protection.outlook.com -all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:reports@dmarc.cyber.dhs.gov; fo=1

DKIM

Selector default
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDWWjIzkgmQkmMM3AjuB3K/rmFRWEqlqgrLf4txCXeboyLhasaQsBM4yvWPTMB8d2Trzxuqo/OHsFkOskUTszonbGsQPwlHPh/uDRaKhAGUga8sL4126Jk1l2YuI3IntOS5K8M6jmOrLIsXFcjwj2xRYxG8QNyXVCV9l6ns176XpwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
National Do Not Call Registry
Description
Register your phone number to report stop or block unwanted, annoying,telemarketing, spam calls, robocalls to the FTC
Final URL
https://donotcall.gov/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://donotcall.gov/
Version
3
Server
AmazonS3
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
*.donotcall.gov
Valid from
2025-09-22T19:00:00-05:00
Valid until
2026-10-22T18:59:59-05:00
Days remaining
73
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

5 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
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

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
18.172.122.27, 18.172.122.31, 18.172.122.36, 18.172.122.5
100,33 ms
Cloudflare
1.1.1.1
54.192.100.108, 54.192.100.3, 54.192.100.63, 54.192.100.7
69,14 ms
Quad9
9.9.9.9
18.172.122.27, 18.172.122.31, 18.172.122.36, 18.172.122.5
95,92 ms
OpenDNS
208.67.222.222
18.172.122.27, 18.172.122.31, 18.172.122.36, 18.172.122.5
104,99 ms
AdGuard
94.140.14.14
54.192.100.108, 54.192.100.3, 54.192.100.63, 54.192.100.7
96,85 ms

IP, geolocation and ASNAssociated network information

18.172.122.27

No data
success
No
country
region
city
asn
organization
isp

18.172.122.5

No data
success
No
country
region
city
asn
organization
isp

18.172.122.36

No data
success
No
country
region
city
asn
organization
isp

18.172.122.31

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

donotcall-gov.mail.protection.outlook.com

Port 25: Closed/unreachable - 25 ms - 
Port 465: Closed/unreachable - 4020.7 ms - 
Port 587: Closed/unreachable - 4007.1 ms -

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