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Total

DNS

Email

Security

Network

Availability

Domaincostar.com

IPv41

IPv60

MX records1

StatusActive

Domain technical report

Access Denied

costar.com

Generated: 2026-08-09T19:33:21-05:00 · Cached result

JSON CSV PDF Visit site

IPv41

IPv60

MX1

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

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

88 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: a23-210-138-169.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 response0 / 40 pts · Availability

HTTP/2 403

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

23.210.138.169

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

10 costar-com.mail.protection.outlook.com.

TXT

70 record(s)

"adobe-sign-verification=1d48bbfc701435de69aaa739f3760b3a"
"mongodb-site-verification=Jmlbij5w9fcnSpB2PXeaPULBsrGZcEW5"
"anthropic-domain-verification-81c0ss=v2WPeZ9SSaxuDYpbugsxNJJ50"
"uk5eC5UVfArThmqrcka1_WlhzQk8sXHCthcO8sseb8k"
"kiro-site-verification=528df5b9-065d-4b7b-931a-906cc269aa37"
"EcTZ1T4xJEF6F139XKM8dtBSSfWt3VSdHrJo7jGY+ig="
"8niIaC4lkHKUdeF/qMfOiBO6ohbU5THo1O6NNTx1CfbVZBMuoZ5wUEBN0SlYFjAVdcUe4QCi4V8mEtwLzUyOEw=="
"airtable-verification=d8829d6ff85e7cf8c37fb844b54c7115"
"wiz-domain-verification=5fd193874a07240b784f0a3fe229ae86677cbeb7873b06003060f611fcfb59bb"
"Ha0IA3PsZyDHzosXQ7tyJugLvW1hIJ0nbhFLwA-mgnk"
"zoho-verification=zb12043825.zmverify.zoho.com"
"cut8t3r196sjr7fgsk307ra8o8"
"facebook-domain-verification=gx1cs3gbyrsju4n0u8rnja67ki8kf9"
"paloaltonetworks-site-verification=aede92cc0ebbab4a06c087effbdc5b2abae8f8f772cc92295961ee800022eb16"
"_jkosg4f5l7m4011lwqiyg4kvknppspy"
"cloudflare_dashboard_sso=70b89cc39f15b9e939fd74c1d1b1bdc2"
"k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCnV0wUprMs0NuP7RPIYSVTlxzSwC9J6pr1J0b7ReaZtx+yCxZU7Ufc/TdGgIpgWDmQMv9wiX/jx2wxog2z6CT/cDl7qysuH6tEiTjIOp2eoSrdCTuI45EfHwCuAFSDDygz0ArZygI7CciYfTzbtiIF502hVjiazbdXD2dkRU0b+QIDAQAB"
"pexip-ms-tenant-domain-verification=318ce639-8a27-4b78-81ba-f4a17ff0481e"
"google-site-verification=a2XukE9v_rJumYMecgCt6PqTMDMJFf5plZThPacWxT4"
"canva-site-verification=Kmo16jkO2-WjqzDGoE0acQ"
"onetrust-domain-verification=97a96971e65f467089b15999423fae35"
"asv=ae6926660c4e673adcbc5b40d545cae3"
"2edq73atnub1his6k6llktrm3a"
"pendo-domain-verification=7b6980df-a870-4f26-83fb-64115a303935"
"RJ6AzQCcMr_CZxEc-76GKePx3xkUGA2oEDtMMhQwlw0"
"VjJZWzI5TzrMtQD7aJ650kBVz1H0AEAlko83aqYlMWs="
"atlassian-sending-domain-verification=09f967f5-912a-44ba-a84c-c386e6b534c0"
"figma-domain-verification=8232118525ac89d71aa3f807657ba9e5e26cfa8f711f2e3144c4c5c7fc2aec1e-1734372308"
"google-site-verification=V2Uq41cnb_brDH_t0cJHXaTiJsOLj6LlODcSKYoWqpk"
"segment-site-verification=B4D17fO1iOGJwRHpvxgLskQaG5hvSunB"
"openai-domain-verification=dv-7hWxp0Ovvq5HToSHGpIreZIu"
"SFMC-QWOkVs09M8M0xNZ3LF4s_ICFTRYIQj789Xoj0HRu"
"logmein-verification-code=c500c4a7-6682-4ec6-ab3f-bc3d76171809"
"MS=ms31196382"
"stripe-verification=593EAB1A1F416307F649330A70E1B04850D64993B5A9D2252F6396BF4A99EED7"
"jamf-site-verification=QWSVWWA4w4y3SFU1kdygUg"
"pardot936613=1f9f0b029f18f80c6d6562ff5bedfde2a2700edfd856ca3aaf27143551c2cf16"
"logmein-verification-code=6343f47d-66e6-420d-9d7e-00b416ceb76f"
"00D20000000Ma73=1TBQF0000000Hk1"
"atlassian-domain-verification=LAkz2FUxxMo9oBp9qlpKyMPkFQT3p7fXn2F/dz0S07Gt8LASUog19dNicOe7njFJ"
"logmein-verification-code=e04efccc-e7f2-4ba3-b4ee-0ff3ebcdf694"
"5rsuh1m8hp3v5a36vrnidt8sl9"
"docker-verification=ef9b7765-4c24-45f5-8954-bbd7a03350e0"
"_o9i81f66vw13ol9clpglw0wgz5i0e8a"
"K4yoJEJ-JUHR0t2F6_WoqSDdE_5p8SWd4SCgX8eTwm8"
"SFMC-OArIRZ64KVaZCjcyxWhZdRhjNiC9nYYtFPEvOMP8"
"_w2tvutp9afonnn2ej45nyrr8kjrzlw8"
"h1-domain-verification=cD9zKcj24tbZFgRbtZ5ieZTzQ5TZLr2XsH6V25jK54ZzC8YR"
"docker-verification=4a705f7d-c11e-4aea-b874-2d1f0bc1ee22"
"_tdkq9tvjbh9k2bl3z6dydxibfcvk0nh"
"_eoe0rvssc517zqy6wusrju04rtgvpw7"
"paloaltonetworks-site-verification=bcba4007294c94781501e1a2e837a87e5b669dc4ecd5b4aa60b23bde554b9edd"
"MS=ms77657212"
"citrix-verification-code=42c6f62f-b974-4c3a-b70a-6428068290db"
"stripe-verification=31852AFD4697653A5503BFEA79C5829F187633A2847CCAA88BEE1CB145079956"
"_2j4f57rzo6nut1kznqclkbmwmiyhqw2"
"hodd31f155oqgiru8gikg8jl11"
"780t66jsf2qt277tm40hhrr4mf"
"LKQDHWUnEgcTu8BvzAXeV9GhDww"
"j10etd44vvk2n6fg4s40ql27vc"
"apple-domain-verification=3Hl7EZad01YToBh5"
"sending_domain1030241=b6ee5db66498bb0fdf5b7f1cd4b0c46d42d99fbe2bca3b920ffbae6f207361b6"
"box-domain-verification=020d25dcb4d7b7f9d799e33b10a7c3bd64370e394803e0086948701e56d2a7fc"
"_1tfjsliuw07tlzq3mqlhvdq5xynx4ue"
"ZOOM_verify_rOvGIJUtTvG5kvufbSxFOA"
"pardot1030241=deabbab9a4cedfbed5a5763ec087e4e8c8ee7ada173710ce3af9f1798af79de4"
"onetrust-domain-verification=a7bac093f2524098b840a5cddfbfa64f"
"v=spf1 ip4:38.109.150.133 ip4:38.64.74.205 ip4:65.200.12.0/24 ip4:204.253.48.0/24 ip4:65.222.180.0/23 ip4:65.210.23.0/24 ip4:50.202.211.161 " "ip4:160.34.15.18 ip4:160.34.15.19 ip4:64.106.173.20 ip4:64.106.173.15 ip4:64.106.173.19 ip4:64.106.173.18 ip4:156.70.121.222 ip4:156.70.151.69 ip4:198.244.55.16 ip4:64.106.173.0/25 ip4:192.69.130.0/23 " "include:spf.mandrillapp.com include:amazonses.com include:spf.protection.outlook.com include:helpscoutemail.com include:spf_c.oraclecloud.com -all"
"cursor-domain-verification-r3ehva=B0fi58L0tP3XJsiStQQ1WqF4v"
"67mtlu6fdae5354kdksdj9nsre"

NS

6 record(s)

a6-67.akam.net.
a3-65.akam.net.
a4-66.akam.net.
a1-73.akam.net.
a22-64.akam.net.
a9-64.akam.net.

SOA

1 record(s)

ns1.costar.com. hostmaster.costar.com. 2026080716 10800 3600 1209600 3600

CAA

4 record(s)

0 issue "godaddy.com"
0 issue "letsencrypt.org"
0 issue "amazon.com"
0 issue "digicert.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 ip4:38.109.150.133 ip4:38.64.74.205 ip4:65.200.12.0/24 ip4:204.253.48.0/24 ip4:65.222.180.0/23 ip4:65.210.23.0/24 ip4:50.202.211.161 ip4:160.34.15.18 ip4:160.34.15.19 ip4:64.106.173.20 ip4:64.106.173.15 ip4:64.106.173.19 ip4:64.106.173.18 ip4:156.70.121.222 ip4:156.70.151.69 ip4:198.244.55.16 ip4:64.106.173.0/25 ip4:192.69.130.0/23 include:spf.mandrillapp.com include:amazonses.com include:spf.protection.outlook.com include:helpscoutemail.com include:spf_c.oraclecloud.com -all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:dmarc_agg@dmarc.everest.email

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqL7vc6nZCt53dA1cwc4wEM7q+l8TPjCgwAkIjZaTth0K0+lCrjuxzojX8ZO3ZtirZsdwmc1U/tAfjzEJWux/OBMDXQXaOu7i339PWwkWsTBmI0XTMP6S57WADfimsNVA5HqOALBf3I0DBzv2JBqMp6tfqxv01jM4L2puX+ukRJc59NWf4lgKKKZnbHvpplQoRREOiLvpL9OAOjxmRh2tH0vCZ08b8eb32cW2Ot2Ohx5hijfQI9VDAKPWMfHZoUlOC3c2zdvo6Mb2+Ryd5QrsZis61KRqB94HxPFZ3iW74tA+eSdPXVybaPXhGKEBQ1lgu9wEzSkpnVAaut2Es9uqbQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Access Denied

Description

Final URL

https://costar.com/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://costar.com/

Version

Server

AkamaiGHost

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

gateway.costar.com

Valid from

2026-04-21T19:00:00-05:00

Valid until

2026-11-06T17:59:59-06:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

0 active

—

HSTSNot detected

—

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

Review

Differences detected

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

23.210.138.169

72,38 ms

Cloudflare

1.1.1.1

23.210.138.169

46,40 ms

Quad9

9.9.9.9

23.204.42.38

53,94 ms

OpenDNS

208.67.222.222

23.210.138.169

35,63 ms

AdGuard

94.140.14.14

96.16.196.22

66,87 ms

IP, geolocation and ASNAssociated network information

23.210.138.169

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

costar-com.mail.protection.outlook.com

Port 25: Closed/unreachable - 22.9 ms - 
Port 465: Closed/unreachable - 4127.5 ms - 
Port 587: Closed/unreachable - 4021.3 ms -

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