mail.cos-debut.com - robtex.com
mail.cos-debut.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 203.137.113.234🇯🇵 IDC203.137.112.0/21 Frontier Inc. | ||||||
cos-debut.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 54.95.231.255🇯🇵 Amazon54.95.128.0/17 EC2 NRT prefix | ||||||
| NS | ns1.value-domain.com ⭐ | ||||||
| NS | ns2.value-domain.com | ||||||
| NS | ns3.value-domain.com ⚠️ Not in zone NS records | ||||||
| NS | ns4.value-domain.com ⚠️ Not in zone NS records | ||||||
| NS | ns5.value-domain.com ⚠️ Not in zone NS records | ||||||
| MX | mail.cos-debut.com ⭐ | ||||||
| TXT | v=spf1 ip4:203.137.113.234 ~all | ||||||
| SOA | ns1.value-domain.comhostmaster@cos-debut.com 2024-01-04 #11 | ||||||
MX for
Same first word
Similar names
DNS History
3 records (1 active, 2 former)
○A202.218.49.562008-12-09 → 2008-12-09 · 3 obs
● 2008-12-09 23:13:20
○ 2015-06-29 20:11:26
○ 2026-05-10 23:55:38
○ 2015-06-29 20:11:26
○ 2026-05-10 23:55:38
●A203.137.113.2342026-02-27 → 2026-05-10 · 3 obs
○ 2016-04-25 21:15:18
● 2026-02-27 22:14:30
● 2026-05-10 23:55:38
● 2026-02-27 22:14:30
● 2026-05-10 23:55:38
○A211.1.233.2202015-06-29 → 2016-04-25 · 5 obs
○ 2008-12-09 23:13:20
● 2015-06-29 20:11:26
● 2016-04-25 21:15:18
○ 2026-02-27 22:14:30
○ 2026-05-10 23:55:38
● 2015-06-29 20:11:26
● 2016-04-25 21:15:18
○ 2026-02-27 22:14:30
○ 2026-05-10 23:55:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| cos-debut.com | ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com... | 5 records |
✅ Authoritative Response
Server:172.64.52.38
NS records: ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com, ns5.value-domain.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cos-debut.com (unsigned zone)
⏱️ Timing
Total: 905ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 203.137.113.234 |
📌 Glue Records Collected
Total: 5
Out-of-bailiwick: 5 (ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com...)
Analysis
Mail Server Role
mail.cos-debut.com is the mail server for cos-debut.com.
IP Addresses
mail.cos-debut.com resolves to one IP number: 203.137.113.234.
other host names including mail.cinderella-group.com, mail.s-touch.jp, mail.kichijoji-fuzoku.jp, mail.hama-boin.com and mail.server-mail-ecross.com share IP numbers with mail.cos-debut.com.