firstclassinc.com - robtex.com
firstclassinc.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 75.145.142.227🇺🇸 COMCAST-IBONE75.144.0.0/13 Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 | ||||||
| PTR | 75-145-142-227-illinois.hfc.comcastbusiness.net | ||||||
| NS | ns55.domaincontrol.com ⭐ | ||||||
| A | 2603:5:21b2::1c🇺🇸 GODADDY-DNS2603:5:21b0::/44 | ||||||
| PTR | ns55.domaincontrol.com | ||||||
| A | 97.74.107.28🇺🇸 GODADDY-DNS97.74.106.0/23 | ||||||
| PTR | ns55.domaincontrol.com | ||||||
| NS | ns56.domaincontrol.com | ||||||
| A | 2603:5:22b2::1c🇺🇸 GODADDY-DNS2603:5:22b0::/44 | ||||||
| PTR | ns56.domaincontrol.com | ||||||
| A | 173.201.75.28🇺🇸 GODADDY-DNS173.201.74.0/23 | ||||||
| PTR | ns56.domaincontrol.com | ||||||
| MX | mdc.firstclassinc.com ⭐ | ||||||
| A | 75.145.142.228🇺🇸 COMCAST-IBONE75.144.0.0/13 Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 | ||||||
| PTR | 75-145-142-228-illinois.hfc.comcastbusiness.net | ||||||
| TXT | _globalsign-domain-verification=rZPditX6BZjOGt31e-QSNTxV8S99YnEyLvbRxXtzUs | ||||||
| TXT | v=spf1 ip4:104.182.132.242 ip4:23.125.108.104 ip4:23.125.108.99 mx -all | ||||||
| TXT | _globalsign-domain-verification=BoGYPvFHaAUqMkn61MWC015oPpFVbCo4xBjpLB40BN | ||||||
| SOA | ns55.domaincontrol.comdns@jomax.net 2023-09-26 #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=1778509556 | ||||||
Subdomains
Same first word
firstclassinc.com |
DNS History
7 records (4 active, 3 former)
●NSns55.domaincontrol.com2015-08-16 → 2026-05-11 · 2 obs
● 2026-05-11 14:28:52
●NSns56.domaincontrol.com2015-08-16 → 2026-05-11 · 2 obs
● 2026-05-11 14:28:52
○MXmail.firstclassinc.com2015-08-16 → 2018-08-04 · 4 obs
● 2018-08-04 09:10:46
○ 2026-02-15 20:08:56
○ 2026-05-11 14:28:52
●MXmdc.firstclassinc.com2026-02-15 → 2026-05-11 · 3 obs
● 2026-02-15 20:08:56
● 2026-05-11 14:28:52
○A162.205.120.1692016-07-11 → 2018-08-04 · 5 obs
● 2016-07-11 06:30:08
● 2018-08-04 09:10:46
○ 2026-02-15 20:08:56
○ 2026-05-11 14:28:52
○A66.80.36.842015-08-16 → 2016-03-12 · 4 obs
● 2016-03-12 13:04:16
○ 2016-07-11 06:30:08
○ 2026-05-11 14:28:52
●A75.145.142.2272026-02-15 → 2026-05-11 · 3 obs
● 2026-02-15 20:08:56
● 2026-05-11 14:28:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| firstclassinc.com | ns55.domaincontrol.com, ns56.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:173.201.75.28
NS records: ns55.domaincontrol.com, ns56.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for firstclassinc.com (unsigned zone)
⏱️ Timing
Total: 113ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 75.145.142.227 |
| NS | 2 | ns55.domaincontrol.com, ns56.domaincontrol.com |
| MX | 1 | mdc.firstclassinc.com (pri: 10) |
| TXT | 3 | _globalsign-domain-verification=rZPditX6, v=spf1 ip4:104.182.132.242 ip4:23.125.10... |
| SOA | 1 | ns55.domaincontrol.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns55.domaincontrol.com, ns55.domaincontrol.com, ns56.domaincontrol.com...)
Analysis
Hierarchy
firstclassinc.com is a parent of mail.firstclassinc.com and mdc.firstclassinc.com.
IP Addresses
firstclassinc.com points to a single IP number: 75.145.142.227.
Name Servers
firstclassinc.com is delegated to two name servers: ns55.domaincontrol.com and ns56.domaincontrol.com.
firstclassinc.com uses the same name server setup as other domains, for instance 7fountains.com, livlang.com, fhconsulting.nl, 95677homes.com and hayleyhong.com.
Host names with two IP numbers:
The host ns55.domaincontrol.com points to 2603:5:21b2::1c and 97.74.107.28.
The host ns56.domaincontrol.com points to 2603:5:22b2::1c and 173.201.75.28.
Mail Servers
The mail server for firstclassinc.com is mdc.firstclassinc.com.
Host name mdc.firstclassinc.com resolves to IP 75.145.142.228.