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Total

DNS

Email

Security

100

Network

100

Availability

Domaindoi.gov

IPv42

IPv62

MX records1

StatusActive

Domain technical report

U.S. Department of the Interior

doi.gov

The U.S. Department of the Interior protects America's natural resources and heritage, honors our cultures and tribal communities, and supplies the energy to power our future.

Generated: 2026-08-09T06:09:15-05:00 · Cached result

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IPv42

IPv62

MX1

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

2 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 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

41 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: a23-33-29-150.deploy.static.akamaitechnologies.com

✓

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 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

2 record(s)

23.33.29.150
23.33.29.151

AAAA

2 record(s)

2600:1407:7400:14::17d7:be8
2600:1407:7400:14::17d7:bea

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 doi-gov.mail.protection.outlook.com.

TXT

4 record(s)

"openai-domain-verification=dv-z1QahsCTwflXMhgtSZxfUNwf"
"_zvymuoe0192rlguzk6z1mjgg837vhpd"
"_6hn0jgfggckinomz4gkl4ybsiohpv2u"
"v=spf1 include:spf.protection.outlook.com ip4:137.227.82.0/26 ip4:137.227.134.0/26 -all"

NS

2 record(s)

west.ns.cloudflare.com.
liz.ns.cloudflare.com.

SOA

1 record(s)

liz.ns.cloudflare.com. dns.cloudflare.com. 2411589162 10000 2400 604800 1800

CAA

0 record(s)

—

Not configured

DS

1 record(s)

2371 13 2 059E33DAD7D147CA90131F45E7646396F99FFB3FE43F6867506B8601 9144461E

DNSKEY

2 record(s)

256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==

RRSIG

4 record(s)

DNSKEY 13 2 3600 20261002051840 20260802051840 2371 doi.gov. Ma/b0U2hQVYaT9+cJ+9LSvD7GctllELJRh21cFq0/LR3SQVx7a4ynQI7 KtGmiTmxgwTHYJuQerG3dUv+bj4XrA==
NS 13 2 86400 20260810120905 20260808100905 34505 doi.gov. NleVcRX5TKlL++LCjsLFsmMgIbWkSUrQcpOZIDEKGtF24zXvUwRkaeGE kGeBvZLYG4RvVHSEauTL189EWoZ0sw==
TXT 13 2 300 20260810120905 20260808100905 34505 doi.gov. w5mK/m2PcLJIe/bIx8WNxzsSVWUDwdIYzSdMV+ycBlKb1czwZMLcwwn1 Cu9YPs2JWn9ckX0h3Mqq0nOSijk7cA==
DS 13 2 3600 20260810120905 20260808100905 35496 gov. TAJrob5Ibm83TRXyigEiKCJn1zn1MFPJiMZ7UgmK/eLmLfilOaWBItrJ WMb6YGqRMqouhlHNzXBw6aSb/kfiWA==

NSEC

1 record(s)

\000.doi.gov. 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 include:spf.protection.outlook.com ip4:137.227.82.0/26 ip4:137.227.134.0/26 -all

DMARC

Configured

v=DMARC1;p=reject;rua=mailto:dmarc_reports@doi.gov,mailto:reports@dmarc.cyber.dhs.gov

DKIM

Selector mail

v=DKIM1; k=rsa; h=sha256; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDqoO5syFukWG/mGwRZqXEJWhA99iHBsg75N0OeMXG3IWnX28cOBumgzqtQE5bHUMCeY0PX9Mn8GiQuQKHZ3iPCJVKYbANOh2HFMRiovWmviPJB8BO1wZ+f82RafRVLPEE3JGagmiJkrhE2RjXvvP0vYlaChYWbuy2SnWSeOhzayQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

U.S. Department of the Interior

Description

The U.S. Department of the Interior protects America's natural resources and heritage, honors our cultures and tribal communities, and supplies the energy to power our future.

Final URL

https://www.doi.gov/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.doi.gov/

Version

Server

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

doi.gov

Valid from

2026-06-21T09:30:44-05:00

Valid until

2026-09-19T09:30:43-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

3 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

—

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

Review

Differences detected

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

23.33.29.150, 23.33.29.151

75,01 ms

Cloudflare

1.1.1.1

23.33.29.150, 23.33.29.151

27,12 ms

Quad9

9.9.9.9

23.220.161.206, 23.220.161.214

62,46 ms

OpenDNS

208.67.222.222

23.33.29.150, 23.33.29.151

46,01 ms

AdGuard

94.140.14.14

23.196.3.176, 23.196.3.196

77,83 ms

IP, geolocation and ASNAssociated network information

23.33.29.150

No data

success

country

region

city

asn

organization

isp

23.33.29.151

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

doi-gov.mail.protection.outlook.com

Port 25: Closed/unreachable - 23.8 ms - 
Port 465: Closed/unreachable - 4046.7 ms - 
Port 587: Closed/unreachable - 4019.7 ms -

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