Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
costar.co.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 07:31:30 UTC · ↺ Refresh
MX Hostnames
- costar-com.mail.protection.outlook.com
MX Priorities
- costar-com.mail.protection.outlook.com: 10
A / AAAA Records
- 96.16.196.22 ↩ a96-16-196-22.deploy.static.akamaitechnologies.com
Mail Server IPs
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.costar.com hostmaster.costar.com 2026012101 10800 3600 604800 3600
Primary NS (mname)
ns1.costar.com
Admin Email (rname)
hostmaster@costar.com
Serial
2026012101
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
a1-73.akam.net
a3-65.akam.net
a9-64.akam.net
a6-67.akam.net
a4-66.akam.net
a22-64.akam.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:65.222.180.0/24 ip4:65.222.181.0/24 ip4:212.9.193.5 ip4:212.9.193.10 ip4:212.9.201.9 include:spf.eventsforce.net include:costar.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
28 records- SPFv=spf1 ip4:65.222.180.0/24 ip4:65.222.181.0/24 ip4:212.9.193.5 ip4:212.9.193.10 ip4:212.9.201.9 include:spf.eventsforce.net include:costar.com -all
- vsce2uj1udo0vkvmo1dc41302m
- 2981lo6tc311f31bu8adec5e8n
- google-site-verification=snzYfRc6sjkt0YcmW2jXDVK8ksXnOv9WARMBr56njmk
- adobe-idp-site-verification=24664704b6bf9cad007ee8e4e6f54db759418404868491369b399f373520defd
- onetrust-domain-verification=3aa376e8dc194653a20c4d971b043e4f
- canva-site-verification=gH2zvFXyT0OC59U5dTVN4w
- docker-verification=c65933fc-6b25-4e12-913c-afcacb45f123
- google-site-verification=rHIfQuBagdPKTe7-lojX0aEso_1ytuUx93IQDcyusZQ
- figma-domain-verification=8232118525ac89d71aa3f807657ba9e5e26cfa8f711f2e3144c4c5c7fc2aec1e-1734372308
- ZOOM_verify_b3ksUEgrQ_SazCMR5wJ1hA
- logmein-verification-code=93421835-bc9f-4fe0-84d0-ab4c33551bf3
- include:spf_c.oraclecloud.com
- knowbe4-site-verification=f260d28316f3a7f096abacd939b0359a
- stripe-verification=6BE08FA74634C162F4627CD9F8A292DF769A8B5059EA9F12100434FB1567F1CD
- zoho-verification=zb79984211.zmverify.zoho.com
- atlassian-domain-verification=LAkz2FUxxMo9oBp9qlpKyMPkFQT3p7fXn2F/dz0S07Gt8LASUog19dNicOe7njFJ
- openai-domain-verification=dv-H3F644CUFl67KfJGJZBjg3Kg
- onetrust-domain-verification=c3052a7a0c0442aa865d905c52536c20
- google-site-verification=EPo7qOz8ezS1az5_Nvq9ipC7G1nrVetRiBwTpBWTry4
- MS=ms52104766
- meqf3i2cje0omoef5tnaoe56s3
- google-site-verification=5HeVoZ4h_-caBtFkpGZEuizS7JuEsfAI6z_G_ammC4o
- google-site-verification=pZQr9CA0MxMX-l_-ly14yThTdXz0VWJLzRz6NTz634s
- pendo-domain-verification=68b485a5-af44-4f1d-b10f-0f0d265a9a85
- apple-domain-verification=BCoD0B5TXNk2fD6B
- rH+M6T7OtXfBUs14ihefr99TVS5hEoOG17cu9BshiRlOGQuXyD1I/Apf0MqvP4h2+SXGE/UjKO7XaFC8xsw/5w==
- pardot493331=7c1588ffb6a59957eea61746cd5e0be685c9e133e9ef972e9817f12bf3fa3caf
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