phdchao.com - robtex.com
phdchao.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.giow1054.siteground.us ⚠️ Not in zone NS records | ||||||
| A | 75.2.77.104🇺🇸 Amazon75.2.64.0/20 | ||||||
| PTR | ac4b097dbd0dd6307.awsglobalaccelerator.com | ||||||
| NS | ns2.giow1054.siteground.us ⚠️ Not in zone NS records | ||||||
| A | 99.83.229.113🇺🇸 Amazon99.83.224.0/20 | ||||||
| PTR | ac4b097dbd0dd6307.awsglobalaccelerator.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=1774471447 | ||||||
Same first word
phdchao.com |
DNS History
12 records (2 active, 10 former)
○NSns1.bluehost.com2016-12-21 → 2017-10-18 · 4 obs
● 2017-10-18 07:43:54
○ 2026-02-17 11:56:54
○ 2026-03-25 20:54:40
●NSns1.giow1054.siteground.us2026-02-17 → 2026-03-25 · 3 obs
● 2026-02-17 11:56:54
● 2026-03-25 20:54:40
○NSns1.siteground.net2026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
○NSns2.bluehost.com2016-12-21 → 2017-10-18 · 4 obs
● 2017-10-18 07:43:54
○ 2026-02-17 11:56:54
○ 2026-03-25 20:54:40
●NSns2.giow1054.siteground.us2026-02-17 → 2026-03-25 · 3 obs
● 2026-02-17 11:56:54
● 2026-03-25 20:54:40
○NSns2.siteground.net2026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
○MXmail.phdchao.com2016-12-21 → 2017-10-18 · 4 obs
● 2017-10-18 07:43:54
○ 2026-02-17 11:56:54
○ 2026-03-25 20:54:40
○MXmx10.mailspamprotection.com2026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
○MXmx20.mailspamprotection.com2026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
○MXmx30.mailspamprotection.com2026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
○A173.254.16.1642016-12-21 → 2017-10-18 · 4 obs
● 2017-10-18 07:43:54
○ 2026-02-17 11:56:54
○ 2026-03-25 20:54:40
○A35.212.48.2472026-02-17 → 2026-03-10 · 4 obs
● 2026-02-17 11:56:54
● 2026-03-10 02:25:34
○ 2026-03-25 20:54:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| phdchao.com | ns1.giow1054.siteground.us, ns2.giow1054.siteground.us | - |
✅ Authoritative Response
Server:75.2.77.104
NS records: ns1.giow1054.siteground.us, ns2.giow1054.siteground.us
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for phdchao.com (unsigned zone)
⏱️ Timing
Total: 353ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
phdchao.com is delegated to two name servers: ns1.giow1054.siteground.us and ns2.giow1054.siteground.us.
phdchao.com uses the same name server setup as reseau2000.net, go2canada.net and giow1054.siteground.us.
phdchao.com at least partially shares name servers with other domains, for instance rqawards.com, dcaconsultingny.com, farazjaka.com, patagoniaheliski.com and trefle.net.
These name servers are often used with ns1.siteground.net and ns2.siteground.net.
Host names with one IP number:
The host ns1.giow1054.siteground.us points to 75.2.77.104 and the host ns2.giow1054.siteground.us points to 99.83.229.113.