doubletree.biz - robtex.com
doubletree.biz
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns3.level3.net ⚠️ Not in zone NS records | ||||||
| A | 216.136.95.12🇺🇸 AS3549216.136.0.0/17 | ||||||
| PTR | ns3.level3.net | ||||||
| NS | ns4.level3.net ⚠️ Not in zone NS records | ||||||
| A | 64.132.94.251🇺🇸 AS354964.132.0.0/16 | ||||||
| PTR | ns4.level3.net | ||||||
biz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld.biz ⭐ | ||||||
| NS | b.gtld.biz | ||||||
| NS | c.gtld.biz | ||||||
| NS | m.gtld.biz | ||||||
| NS | n.gtld.biz | ||||||
| NS | w.gtld.biz | ||||||
| NS | x.gtld.biz | ||||||
| NS | y.gtld.biz | ||||||
| SOA | a.gtld.bizadmin@tldns.godaddy serial=1785436486 | ||||||
Same first word
DNS History
2 records (2 active, 0 former)
●NSns3.level3.net2026-07-27 → 2026-07-30 · 2 obs
● 2026-07-30 19:08:18
●NSns4.level3.net2026-07-27 → 2026-07-30 · 2 obs
● 2026-07-30 19:08:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| biz | b.gtld.biz, m.gtld.biz, y.gtld.biz, w.gtld.biz... | - |
| doubletree.biz | ns4.level3.net, ns3.level3.net | - |
✅ Authoritative Response
Server:216.136.95.12
NS records: ns4.level3.net, ns3.level3.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for doubletree.biz (unsigned zone)
⏱️ Timing
Total: 878ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
The NS records for doubletree.biz delegate to ns3.level3.net and ns4.level3.net.
The name server configuration of doubletree.biz is shared with other domains, for instance 145.46.174.in-addr.arpa, 69.253.216.in-addr.arpa, generacpowersystems.com and two others.
The name servers of doubletree.biz overlap at least partially with those of other domains — among them toyota-supraconnect.com, 99.192.206.in-addr.arpa, myhcso.net and two more.
These name servers commonly appear in delegations together with dbru.br.ns.els-gms.att.net, dmtu.mt.ns.els-gms.att.net, b23.ns.els-gms.att.net and 6 other.
Both ns3.level3.net and ns4.level3.net have a single IP address each — ns3.level3.net resolves to 216.136.95.12 while ns4.level3.net resolves to 64.132.94.251.