phtstudy.com - dns.ninja
phtstudy.com
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=1785013142 | ||||||
Subdomains
Same first word
phtstudy.com |
DNS History
17 records (11 active, 6 former)
●NSertns01.ert.com2017-06-20 → 2026-07-25 · 3 obs
● 2017-06-20 07:48:20
● 2026-07-25 21:18:16
●NSertns02.ert.com2017-06-20 → 2026-07-25 · 3 obs
● 2017-06-20 07:48:20
● 2026-07-25 21:18:16
○NSphtdns1.phtcorp.com2009-01-30 → 2016-05-17 · 4 obs
● 2016-05-17 14:06:16
○ 2017-06-20 07:48:20
○ 2026-07-25 21:18:16
○NSphtdns2.phtcorp.com2009-01-30 → 2016-05-17 · 4 obs
● 2016-05-17 14:06:16
○ 2017-06-20 07:48:20
○ 2026-07-25 21:18:16
○NSphtdns3.phtcorp.com2009-01-30 → 2016-05-17 · 4 obs
● 2016-05-17 14:06:16
○ 2017-06-20 07:48:20
○ 2026-07-25 21:18:16
●MXalt1.aspmx.l.google.com2026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
●MXalt2.aspmx.l.google.com2026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
●MXaspmx.l.google.com2026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
●MXaspmx2.googlemail.com2026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
●MXaspmx3.googlemail.com2026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
●MXhodsmtp01.phtcorp.com2015-06-18 → 2026-07-25 · 3 obs
● 2015-06-18 14:04:04
● 2026-07-25 21:18:16
○MXsmtp0.ert.com2017-06-20 → 2017-07-31 · 5 obs
● 2017-06-20 07:48:20
● 2017-07-31 23:00:42
○ 2026-02-18 16:13:28
○ 2026-07-25 21:18:16
●MXsmtp1.ert.com2017-06-20 → 2026-07-25 · 3 obs
● 2017-06-20 07:48:20
● 2026-07-25 21:18:16
●MXsmtp2.ert.com2017-06-20 → 2026-07-25 · 3 obs
● 2017-06-20 07:48:20
● 2026-07-25 21:18:16
○MXstudymail2009-01-30 → 2009-01-30 · 3 obs
○ 2015-06-18 14:04:04
○ 2026-07-25 21:18:16
○A207.154.10.102015-06-18 → 2017-07-31 · 5 obs
● 2015-06-18 14:04:04
● 2017-07-31 23:00:42
○ 2026-02-18 16:13:28
○ 2026-07-25 21:18:16
●A38.97.74.172026-02-18 → 2026-07-25 · 3 obs
● 2026-02-18 16:13:28
● 2026-07-25 21:18:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | c.gtld-servers.net, m.gtld-servers.net, g.gtld-servers.net, i.gtld-servers.net... | - |
| phtstudy.com | ertns01.ert.com, ertns02.ert.com | 2 records |
✅ Authoritative Response
Server:8.19.195.2
NS records: ertns01.ert.com, ertns02.ert.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for phtstudy.com (unsigned zone)
⏱️ Timing
Total: 233ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 38.97.74.17 |
| NS | 2 | ertns02.ert.com, ertns01.ert.com |
| MX | 8 | ALT1.ASPMX.L.GOOGLE.com (pri: 5), smtp2.ert.com (pri: 900)... |
| TXT | 2 | v=spf1 mx ip4:205.220.181.246 ip4:205.22, google-site-verification=hNoRlsyDrgDKHJS |
| SOA | 1 | ertns01.ert.com hostmaster.ert.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ertns01.ert.com, ertns02.ert.com)
Analysis
Hierarchy
phtstudy.com acts as a parent domain for organon178900.phtstudy.com, telecomlp.phtstudy.com, pozenlnp.phtstudy.com, zeus.phtstudy.com, gsk.phtstudy.com and hundreds of other host names beneath it.
IP Addresses
phtstudy.com has exactly one IP address — 38.97.74.17.
logpadweb2.phtstudy.com, zeus.phtstudy.com, coreweb1.phtstudy.com plus two other host names have IP numbers in common with phtstudy.com.
Name Servers
Two name servers handle the delegation for phtstudy.com: ertns01.ert.com and ertns02.ert.com.
The name server configuration of phtstudy.com is shared with other domains, for instance 240-28.9.149.12.in-addr.arpa, diaryproweb.com, eprodesigner.com and two others.
phtstudy.com shares at least some of its name servers with domains including clariodev.com, biomedsys.com and clarioclinical.com
These name servers tend to appear together with the name servers ertns01.clariodev.com, ertns02.clariodev.com and ns01.clariodev.com.
ertns01.ert.com directs to 12.149.45.222 and ertns02.ert.com directs to 8.19.195.2; each host name points to exactly one IP number.
Mail Servers
Mail for phtstudy.com is routed through 8 mail servers, including smtp1.ert.com, smtp2.ert.com, aspmx2.googlemail.com and 5 other.
At least some of the mail servers used by phtstudy.com are shared with other domains: chrismaclean.co.uk, metini.pl, funkyteeus.com and two others among them.
These mail servers are often deployed together with aspmx.l.google.com, alt2.aspmx.l.google.com, alt1.aspmx.l.google.com and 5 other mail servers.
Host names pointing to two IP addresses:
aspmx2.googlemail.com resolves to two addresses: 108.177.123.26 and 2800:3f0:4003:c0f::1a.
aspmx3.googlemail.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1a.
aspmx.l.google.com resolves to two addresses: 142.251.163.27 and 2607:f8b0:4004:c1d::1a.
alt1.aspmx.l.google.com resolves to two addresses: 108.177.123.27 and 2800:3f0:4003:c0f::1a.
alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1b.
Host names resolving to a single IP address:
The hostname smtp1.ert.com resolves to 8.19.195.16.
The hostname smtp2.ert.com resolves to 12.149.45.220.
The hostname hodsmtp01.phtcorp.com resolves to 207.154.10.11.
aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 2800:3f0:4003:c0f::1a IP addresses.
aspmx3.googlemail.com along with alt2.aspmx.l.google.com each resolve to 172.253.116.26 IP addresses.