pbtmath.edu.vn - robtex.com
pbtmath.edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3037::6815:2583🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::ac43:d03d🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.37.131Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.208.61🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | cody.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b6b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c16b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:216b🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| A | 108.162.193.107🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| A | 172.64.33.107🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| A | 173.245.59.107🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cody.ns.cloudflare.com | ||||||
| NS | izabella.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:262e🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c22e🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:222e🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| A | 108.162.194.46🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| A | 162.159.38.46Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| A | 172.64.34.46🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | izabella.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.37.131, 172.67.208.61 | ||||||
| IPv6 hints | 2606:4700:3037::6815:2583, 2606:4700:3037::ac43:d03d | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=254, name=cloudflare-ech.com | ||||||
| SOA | cody.ns.cloudflare.comdns@cloudflare.com serial=2403815073 | ||||||
edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns-master.vnnic.vn ⭐ | ||||||
| NS | a.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | b.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | c.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | d.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | e.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | f.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | g.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | h.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| SOA | dns-master.vnnic.vnpostmaster@vnnic.vn serial=2018565044 | ||||||
Subdomains
www.pbtmath.edu.vn |
Same first word
pbtmath.edu.vn |
DNS History
6 records (6 active, 0 former)
●NScody.ns.cloudflare.com2026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
●NSizabella.ns.cloudflare.com2026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
●A104.21.37.1312026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
●A172.67.208.612026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
●A2606:4700:3037::6815:25832026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
●A2606:4700:3037::ac43:d03d2026-04-30 → 2026-05-11 · 2 obs
● 2026-05-11 10:29:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn... | - |
| pbtmath.edu.vn | cody.ns.cloudflare.com, izabella.ns.cloudflare.com | - |
✅ Authoritative Response
Server:162.159.38.46
NS records: cody.ns.cloudflare.com, izabella.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for pbtmath.edu.vn (unsigned zone)
⏱️ Timing
Total: 771ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.208.61, 104.21.37.131 |
| AAAA | 2 | 2606:4700:3037::6815:2583, 2606:4700:3037::ac43:d03d |
| NS | 2 | cody.ns.cloudflare.com, izabella.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | cody.ns.cloudflare.com dns.cloudflare.co |
Analysis
Hierarchy
pbtmath.edu.vn is a parent of www.pbtmath.edu.vn.
IP Addresses
pbtmath.edu.vn resolves to four IPs: 2606:4700:3037::6815:2583, 2606:4700:3037::ac43:d03d, 104.21.37.131 and 172.67.208.61.
Other host names such as bodeguita.com.ua, goldschmiede-albath.de, financiereestran.com, wp.rmg2.net and ningxiamedia.cn share IP numbers with pbtmath.edu.vn.
Name Servers
pbtmath.edu.vn is delegated to two name servers: cody.ns.cloudflare.com and izabella.ns.cloudflare.com.
pbtmath.edu.vn uses the same name server setup as other domains, including cataff-tds.com, peccaleather.com, icclifecoachingcertification.com, zlatokoral.sk and smartcv.no.
At least part of the name servers for pbtmath.edu.vn are shared with other domains, for instance mikeup.church, aslanusta.com, krisvandesande.be, askostours.com and h6012.cn.
These name servers are commonly used with terin.ns.cloudflare.com, shaz.ns.cloudflare.com, agustin.ns.cloudflare.com and lucy.ns.cloudflare.com.
Host names with six IP numbers:
cody.ns.cloudflare.com points to: 2606:4700:58::adf5:3b6b, 2803:f800:50::6ca2:c16b, 2a06:98c1:50::ac40:216b, 108.162.193.107, 172.64.33.107 and 173.245.59.107.
izabella.ns.cloudflare.com points to: 2606:4700:50::a29f:262e, 2803:f800:50::6ca2:c22e, 2a06:98c1:50::ac40:222e, 108.162.194.46, 162.159.38.46 and 172.64.34.46.