m4e5b.lukubook.com - robtex.com
m4e5b.lukubook.com
| CNAME | mx1.dusu.org | ||||||
| CNAME | mx6.dusu.org | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 198.23.250.202🇺🇸 COLOCROSSING198.23.250.0/24 | ||||||
| PTR | smtp.quciw.com | ||||||
lukubook.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 172.247.93.43🇺🇸 CNSERVERSLLC172.247.93.0/24 Proxy-registered route object | ||||||
| NS | gannon.ns.cloudflare.com ⭐ | ||||||
| NS | grannbo.ns.cloudflare.com | ||||||
| MX | m0d08.lukubook.com ⭐ | ||||||
| MX | m4e5b.lukubook.com(50) | ||||||
| TXT | v=spf1 include:usfe22a.lukubook.com -all | ||||||
| SOA | gannon.ns.cloudflare.comdns@cloudflare.com serial=2411673667 | ||||||
MX for
DNS History
1 record (1 active, 0 former)
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | m.gtld-servers.net, g.gtld-servers.net, c.gtld-servers.net, j.gtld-servers.net... | - |
| lukubook.com | grannbo.ns.cloudflare.com, gannon.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.194.150
NS records: grannbo.ns.cloudflare.com, gannon.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for lukubook.com (unsigned zone)
⏱️ Timing
Total: 84ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | mx1.dusu.org |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (grannbo.ns.cloudflare.com, grannbo.ns.cloudflare.com, grannbo.ns.cloudflare.com...)
Analysis
Mail Server Role
Mail for lukubook.com is routed through the mail server m4e5b.lukubook.com.
m0d08.lukubook.com frequently appears as a mail server alongside m4e5b.lukubook.com.
IP Addresses
m4e5b.lukubook.com has exactly one IP address — 198.23.250.202.
mx6.dusu.org, mx6.dushu.ru, mx6.iqun.org plus two other host names have IP numbers in common with m4e5b.lukubook.com.