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Total

DNS

Email

Security

Network

100

Availability

Domaincostco.com

IPv41

IPv60

MX records2

StatusActive

Domain technical report

costco.com

Generated: 2026-08-09T01:32:15-05:00 · Cached result

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IPv41

IPv60

MX2

NS6

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

6 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 policy5 / 5 pts · Dns

Certificate authority restriction.

DNS propagation0 / 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

139 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: a23-78-10-64.deploy.static.akamaitechnologies.com

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)

23.78.10.64

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

10 mx0a-001f9d01.pphosted.com.
10 mx0b-001f9d01.pphosted.com.

TXT

30 record(s)

"google-site-verification=dffTnhrKhs3V5-UUHvEYJg-RNLJjBz27jCBqmF6sX_E"
"onx=2d96b540-bcd6-4410-813c-d5e96ab635c5"
"onetrust-domain-verification=0cc4aa566b3f4d3d9f5f03bc7cfd73c4"
"d3958bd3-ebec-43fc-8b73-53355efdf2f6.costco.com"
"have-i-been-pwned-verification=7411effeb11c12300a4c027396b4cf0f"
"facebook-domain-verification=46if6nzbzbffbhikh3uq8sye7ez5bg"
"docusign=4db9a87a-9dea-417f-bfaa-d45bf7c94291"
"dtm-domain-verification=RvQ3bIbvQAeeMHbrXwHbtfcU-Z8WGxW6tBQQFfdpIvA"
"google-site-verification=XGHXzaAnl-HmYsIW4QB-l4aaHMgJyBHqcT3Jc8SB2BY"
"adobe-idp-site-verification=ae9e3f0f-2848-4000-aed4-e1c7e8031815"
"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all"
"VmwCafXLaizwh4cfQPdy"
"onetrust-domain-verification=e62749d1cc3549bea14bacad4cd8215f"
"google-site-verification=3Kx9tc2_v5CgX3NuVqNwWFZRYanPPJCP3__8KbRxn5Q"
"google-site-verification=_UMsl36liAGjRl5ldvmM5bK7YCzP_z19C522LsS_6Z4"
"Dynatrace-site-verification=85537782-cedf-4d0d-9b24-3126f2ae1dcb__87kk52lv2c0qrp2k60td8iugme"
"atlassian-domain-verification=mOyfCnOmDOAo2wCWxZ1feSqlR3yeXX6nP2KotAWqkWWtO1NAJydXpiYNCYEhJUn8"
"vmware-cloud-verification-7161df13-1d90-4cbe-a1a9-0f29fc3e9ffc"
"MS=ms45356090"
"ciscocidomainverification=778c9d75e8b6fdb7dc3f095b677d08d21ececebe8462cb691c377eb0c061c825"
"flexera-domain-verification-mddzccpcqcdbeuih"
"intersight=c7f5c84fa7c1559a23ae37f0a45aa2806cc1b09291dfe94ffa5c775b65feb280"
"postman-domain-verification=a5e9b1c7145c22a192ff089eb9c140d4a589b99d7763b87483c24c2deba6d7032578d3a1329849d9e52dd2ae59b3721b451d3fdb461b4514f4e8f5f6b8d696cd"
"docusign=3e51deb4-b2f9-46ef-b120-18f6955ebce1"
"onx=58b94d97-109f-4db2-98cf-5a1c93395b4d"
"a3a34ae6-fccb-4452-9105-cb31f5348086"
"flexera-domain-verification-bazgmhadwejbbgdq"
"onx=efbf8ab1-7e83-4416-85a4-711586edb47c"
"d4c2e4a3297fe25a71d030b67eb83bfc"
"ms-domain-verification=2d5e7430-b403-4b17-a1df-4cb3eee9967b"

NS

6 record(s)

a6-64.akam.net.
a1-116.akam.net.
a28-66.akam.net.
a5-64.akam.net.
a14-67.akam.net.
a9-66.akam.net.

SOA

1 record(s)

a1-116.akam.net. hostmaster.akamai.com. 3829 10800 3600 2332800 900

CAA

2 record(s)

128 issue "digicert.com"
128 issue "certainly.com"

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:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all

DMARC

Configured

v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;

DKIM

Selector google

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCVmxsYtFOkx0zlCx0nWUXuBl0YB2DtOvPAsFsnrHTzkylmph3P+iJrKa8vA0C0QdVQRMdQfy2Z/V+ooF7gwc+B8Tplx7xRT2+7TfofQexKp3w3Ke3VWxP5bZylwBQTuPirP8aEICNQxndKeOGs0tU0hw99o4EClhUpSSeHVCBToQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

No data

Title

Description

Final URL

https://costco.com/

HTTP status

HTTP

Status

HTTP/2 200

Final URL

https://www.costco.com/

Version

Server

istio-envoy

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

costco.com

Valid from

2026-06-10T19:00:00-05:00

Valid until

2026-12-26T17:59:59-06:00

Days remaining

139

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

2 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

—

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

Review

Differences detected

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

23.78.10.64

53,54 ms

Cloudflare

1.1.1.1

23.14.94.16

53,09 ms

Quad9

9.9.9.9

23.217.78.29

185,43 ms

OpenDNS

208.67.222.222

23.78.10.64

32,72 ms

AdGuard

94.140.14.14

23.56.210.23

60,18 ms

IP, geolocation and ASNAssociated network information

23.78.10.64

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

mx0a-001f9d01.pphosted.com

Port 25: Closed/unreachable - 9.1 ms - 
Port 465: Closed/unreachable - 48.4 ms - 
Port 587: Closed/unreachable - 48.4 ms -

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