server.tinhoahoc.com - robtex.com

server.tinhoahoc.com

DNSSEC⚠️ Not signed
A192.161.49.130🇺🇸 HOSTPAPA-LA192.161.49.0/24 325 Delaware Avenue Suite 300 Buffalo NY 14202 United States
PTRmx1.advertisere.com
NSns1.tinhoahoc.com ⭐ ⚠️ Not in parent delegation
A192.161.49.130🇺🇸 HOSTPAPA-LA192.161.49.0/24 325 Delaware Avenue Suite 300 Buffalo NY 14202 United States
PTRmx1.advertisere.com
NSns2.tinhoahoc.com ⚠️ Not in parent delegation
A192.161.49.130🇺🇸 HOSTPAPA-LA192.161.49.0/24 325 Delaware Avenue Suite 300 Buffalo NY 14202 United States
PTRmx1.advertisere.com
MXserver.tinhoahoc.com ⭐
A192.161.49.130🇺🇸 HOSTPAPA-LA192.161.49.0/24 325 Delaware Avenue Suite 300 Buffalo NY 14202 United States
PTRmx1.advertisere.com
SOAns1.tinhoahoc.comroot@server.tinhoahoc.com 2026-07-27 #0

tinhoahoc.com

DNSSEC⚠️ Not signed
A192.161.49.130🇺🇸 HOSTPAPA-LA192.161.49.0/24 325 Delaware Avenue Suite 300 Buffalo NY 14202 United States
NSns1.tinhoahoc.com ⭐ ⚠️ Not in parent delegation
NSns1.rynancrm.com ⚠️ Not in zone NS records
NSns2.rynancrm.com ⚠️ Not in zone NS records
NSns2.tinhoahoc.com ⚠️ Not in parent delegation
MXtinhoahoc.com ⭐
TXTv=spf1 ip4:192.161.49.130 include:vhost.vn +a +mx +ip4:69.12.77.90 +include:r...
SOAns1.tinhoahoc.comroot@server.server.com 2026-08-02 #1

PTR for

90.77.12.69.in-addr.arpa
94.77.12.69.in-addr.arpa

MX for

server.tinhoahoc.com

Same first word

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DNS History

5 records (4 active, 1 former)

201820192020202120222023202420252026NSns1.tinhoahoc.comns2.tinhoahoc.comMXserver.tinhoahoc.comA192.161.49.13064.50.172.66
●NSns1.tinhoahoc.com2026-03-10 → 2026-08-02 · 2 obs
● 2026-03-10 12:28:32
● 2026-08-02 17:14:58
●NSns2.tinhoahoc.com2026-03-10 → 2026-08-02 · 2 obs
● 2026-03-10 12:28:32
● 2026-08-02 17:14:58
●MXserver.tinhoahoc.com2026-03-10 → 2026-08-02 · 2 obs
● 2026-03-10 12:28:32
● 2026-08-02 17:14:58
●A192.161.49.1302026-03-10 → 2026-08-02 · 3 obs
○ 2017-10-18 06:42:34
● 2026-03-10 12:28:32
● 2026-08-02 17:14:58
○A64.50.172.662017-10-18 → 2017-10-18 · 3 obs
● 2017-10-18 06:42:34
○ 2026-03-10 12:28:32
○ 2026-08-02 17:14:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
tinhoahoc.comns1.rynancrm.com, ns2.rynancrm.com2 records

✅ Authoritative Response

Server:192.161.49.130

NS records: ns1.rynancrm.com, ns2.rynancrm.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tinhoahoc.com (unsigned zone)

⏱️ Timing

Total: 155ms | Queries: -

📄 Records

TypeCountSample Data
A1192.161.49.130
NS2ns1.tinhoahoc.com, ns2.tinhoahoc.com
MX1server.tinhoahoc.com (pri: 0)
SOA1ns1.tinhoahoc.com root.server.tinhoahoc.

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.rynancrm.com, ns2.rynancrm.com)

Analysis

Mail Server Role

server.tinhoahoc.com serves as a mail server for server.tinhoahoc.com.

IP Addresses

server.tinhoahoc.com has exactly one IP address — 192.161.49.130.

ns1.rynancrm.com, ns2.rynancrm.com, ns2.tinhoahoc.com plus two other host names have IP numbers in common with server.tinhoahoc.com.

Name Servers

The NS records for server.tinhoahoc.com delegate to ns1.tinhoahoc.com and ns2.tinhoahoc.com.

Some name servers delegated to server.tinhoahoc.com are also used by other domains, notably rynancrm.com and tinhoahoc.com.

Each of ns1.tinhoahoc.com and ns2.tinhoahoc.com points to exactly one IP address: 192.161.49.130.

ns1.tinhoahoc.com and ns2.tinhoahoc.com each have 192.161.49.130 IP addresses.

Mail Servers

server.tinhoahoc.com uses exactly one mail server, which is server.tinhoahoc.com.

server.tinhoahoc.com resolves to 192.161.49.130 and no other IP number.