dotnetcrew.com - robtex.com
dotnetcrew.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1568::14🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php7.web4u.cz | ||||||
| A | 81.91.86.14🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mx1.mailchannels.net ⭐ | ||||||
| A | 54.187.177.89🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| A | 54.187.177.89🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-04 #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=1778526141 | ||||||
Subdomains
mail.dotnetcrew.com |
Same first word
dotnetcrew.com |
DNS History
8 records (6 active, 2 former)
●NSns.web4u.cz2026-04-29 → 2026-05-11 · 3 obs
● 2026-04-29 11:44:12
● 2026-05-11 19:21:00
○NSns1.verification-hold.suspended-domain.com2017-03-28 → 2017-03-28 · 3 obs
○ 2026-04-29 11:44:12
○ 2026-05-11 19:21:00
●NSns2.web4u.cz2026-04-29 → 2026-05-11 · 3 obs
● 2026-04-29 11:44:12
● 2026-05-11 19:21:00
●MXmx1.mailchannels.net2026-04-29 → 2026-05-11 · 2 obs
● 2026-05-11 19:21:00
●MXmx2.mailchannels.net2026-04-29 → 2026-05-11 · 2 obs
● 2026-05-11 19:21:00
●A2001:1568::142026-04-29 → 2026-05-11 · 3 obs
● 2026-04-29 11:44:12
● 2026-05-11 19:21:00
○A209.99.17.272017-03-28 → 2017-03-28 · 3 obs
○ 2026-04-29 11:44:12
○ 2026-05-11 19:21:00
●A81.91.86.142026-04-29 → 2026-05-11 · 3 obs
● 2026-04-29 11:44:12
● 2026-05-11 19:21:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| dotnetcrew.com | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for dotnetcrew.com (unsigned zone)
⏱️ Timing
Total: 795ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.14 |
| AAAA | 1 | 2001:1568::14 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 2 | mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
Hierarchy
dotnetcrew.com is the parent of mail.dotnetcrew.com.
IP Addresses
dotnetcrew.com resolves to two IP numbers: 2001:1568::14 and 81.91.86.14.
other host names including cutandcolor.cz, vs150.server4u.cz, filateliesova.cz, imonitoring.cz and ori.cz share IP numbers with dotnetcrew.com.
Name Servers
dotnetcrew.com is delegated to two name servers ns2.web4u.cz and ns.web4u.cz.
dotnetcrew.com shares the same name server setup as other domains, for instance elega.cz, klweb.cz, tezamo.info, tattoo-club.cz and machra.cz.
Host names with two IP numbers:
The host name ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12; the host name ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
Two mail servers handle dotnetcrew.com: mx1.mailchannels.net and mx2.mailchannels.net.
dotnetcrew.com shares the same mail server setup as other domains, for instance isapagani.com, kosgear.com, teresapayne.com, pacsis.com.co and barok.org.
dotnetcrew.com shares mail servers with other domains to some extent, for instance actiongonow.com.
Host names with a single IP:
mx1.mailchannels.net points to 54.187.177.89.
mx2.mailchannels.net points to 54.187.177.89.
Host names pointing to 54.187.177.89: mx1.mailchannels.net and mx2.mailchannels.net.