ultrahost.com - robtex.com
ultrahost.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 66.37.141.239🇺🇸 FLT-DENVER66.37.141.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | ws3-3.firstlink.com | ||||||
| NS | ns2.firstlink.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 66.37.141.4🇺🇸 FLT-DENVER66.37.141.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | ns2.firstlink.com | ||||||
| NS | denver.firstlink.com ⚠️ Not in zone NS records | ||||||
| A | 66.37.143.67🇺🇸 FLT-DENVER66.37.143.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | ns1.firstlink.com | ||||||
| NS | ns.firstlink.com | ||||||
| A | 66.37.143.67🇺🇸 FLT-DENVER66.37.143.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | ns1.firstlink.com | ||||||
| NS | ns3.firstlink.com | ||||||
| A | 66.37.142.34🇺🇸 FLT-DENVER66.37.142.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | ns3.firstlink.com | ||||||
| NS | ns4.firstlink.com | ||||||
| A | 66.37.128.11🇺🇸 Amazon66.37.128.0/24 EC2 Prefix | ||||||
| PTR | ns4.firstlink.com | ||||||
| MX | mx.firstlink.com ⭐ | ||||||
| A | 66.37.141.52🇺🇸 FLT-DENVER66.37.141.0/24 FIRST LINK TECHNOLOGY, INC. | ||||||
| PTR | mx.firstlink.com | ||||||
| SOA | ns.firstlink.comhostmaster@firstlink.com 2020-08-20 #0 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1777014606 | ||||||
Subdomains
spam.ultrahost.com |
Same first word
Similar names
DNS History
9 records (7 active, 2 former)
●NSdenver.firstlink.com2026-03-26 → 2026-04-24 · 3 obs
● 2026-03-26 11:22:16
● 2026-04-24 07:11:34
●NSns.firstlink.com2015-06-18 → 2026-04-24 · 2 obs
● 2026-04-24 07:11:34
●NSns2.firstlink.com2015-06-18 → 2026-04-24 · 2 obs
● 2026-04-24 07:11:34
●NSns3.firstlink.com2015-06-18 → 2026-04-24 · 2 obs
● 2026-04-24 07:11:34
●NSns4.firstlink.com2015-06-18 → 2026-04-24 · 2 obs
● 2026-04-24 07:11:34
●MXmx.firstlink.com2026-03-26 → 2026-04-24 · 3 obs
● 2026-03-26 11:22:16
● 2026-04-24 07:11:34
○MXrelay.firstlink.com2015-06-18 → 2016-11-25 · 4 obs
● 2016-11-25 11:54:26
○ 2017-12-31 04:49:08
○ 2026-04-24 07:11:34
○MXspam.ultrahost.com2017-12-31 → 2017-12-31 · 4 obs
● 2017-12-31 04:49:08
○ 2026-03-26 11:22:16
○ 2026-04-24 07:11:34
●A66.37.141.2392015-06-18 → 2026-04-24 · 2 obs
● 2026-04-24 07:11:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | b.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net, k.gtld-servers.net... | - |
| ultrahost.com | denver.firstlink.com, ns2.firstlink.com, ns3.firstlink.com, ns4.firstlink.com | 4 records |
✅ Authoritative Response
Server:66.37.143.67
NS records: denver.firstlink.com, ns2.firstlink.com, ns3.firstlink.com, ns4.firstlink.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ultrahost.com (unsigned zone)
⏱️ Timing
Total: 480ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 66.37.141.239 |
| NS | 4 | ns2.firstlink.com, ns3.firstlink.com... |
| MX | 1 | mx.firstlink.com (pri: 10) |
| SOA | 1 | ns.firstlink.com hostmaster.firstlink.co |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (denver.firstlink.com, ns2.firstlink.com, ns3.firstlink.com...)
Analysis
Hierarchy
spam.ultrahost.com has ultrahost.com as its parent.
IP Addresses
ultrahost.com maps to IP address 66.37.141.239.
Other host names for instance ulte.com and ws3-3.firstlink.com share IP numbers with ultrahost.com.
Name Servers
ultrahost.com delegates to five name servers: denver.firstlink.com, ns2.firstlink.com, ns3.firstlink.com, ns4.firstlink.com and ns.firstlink.com.
ultrahost.com at least partially shares name servers with other domains such as 159.37.66.in-addr.arpa, alternateweb.com, ticketstore.com, firstdetect.com and heatherlessar.com.
these name servers are commonly used with the name servers ns1.firstlink.com.
Host names with one IP number:
The host name denver.firstlink.com points to: 66.37.143.67.
The host name ns2.firstlink.com points to: 66.37.141.4.
The host name ns3.firstlink.com points to: 66.37.142.34.
The host name ns4.firstlink.com points to: 66.37.128.11.
The host name ns.firstlink.com points to: 66.37.143.67.
Host names that point to 66.37.143.67: denver.firstlink.com and ns.firstlink.com.
Mail Servers
ultrahost.com is handled by a single mail server, mx.firstlink.com.
ultrahost.com shares the same mail server setup as other domains, including qmis.com, rentonline.com, armysurplus4less.com, armysurplusforless.com and alternateweb.com.
ultrahost.com shares some mail servers with other domains, for instance heritageapts.com and ewhiteboard.com.
these mail servers are commonly used alongside the mail servers mail2.denveronline.net.
mx.firstlink.com points to one IP number: 66.37.141.52.