how.com.vn - robtex.com
how.com.vn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::ac43:9769🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:f3🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.0.243Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.151.105🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | rose.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a8d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c08d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:208d🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| A | 108.162.192.141🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| A | 172.64.32.141🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| A | 173.245.58.141🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | rose.ns.cloudflare.com | ||||||
| NS | sid.ns.cloudflare.com | ||||||
| A | 2606:4700:58::adf5:3b8f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c18f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:218f🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| A | 108.162.193.143🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| A | 172.64.33.143🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| A | 173.245.59.143🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | sid.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.0.243, 172.67.151.105 | ||||||
| IPv6 | 2606:4700:3032::ac43:9769, 2606:4700:3037::6815:f3 | ||||||
| SOA | rose.ns.cloudflare.comdns@cloudflare.com serial=2399483976 | ||||||
com.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=2022636781 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSrose.ns.cloudflare.com2026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
●NSsid.ns.cloudflare.com2026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
●A104.21.0.2432026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
●A172.67.151.1052026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
●A2606:4700:3032::ac43:97692026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
●A2606:4700:3037::6815:f32026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 22:21:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn... | 16 records |
| how.com.vn | sid.ns.cloudflare.com, rose.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.192.141
NS records: sid.ns.cloudflare.com, rose.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for how.com.vn (unsigned zone)
⏱️ Timing
Total: 1293ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.151.105, 104.21.0.243 |
| AAAA | 2 | 2606:4700:3032::ac43:9769, 2606:4700:3037::6815:f3 |
| NS | 2 | rose.ns.cloudflare.com, sid.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | rose.ns.cloudflare.com dns.cloudflare.co |
📌 Glue Records Collected
Total: 16
In-bailiwick: 16 (a.dns-servers.vn, a.dns-servers.vn, b.dns-servers.vn...)
Analysis
IP Addresses
Four IP numbers are pointed to by how.com.vn: 2606:4700:3032::ac43:9769, 2606:4700:3037::6815:f3, 104.21.0.243 and 172.67.151.105.
other host names including www.c-s-i.org, schweppes.co.il, 81326760.com.cdn.cloudflare.net, terexcloud.in and huangshanljd.com share IP numbers with how.com.vn.
Name Servers
how.com.vn is delegated to two name servers rose.ns.cloudflare.com and sid.ns.cloudflare.com.
how.com.vn shares the same name server setup as other domains, for instance winelust.com, s4u.biz, tysonscentraloffice.com, hillsbrothersconstructioninc.com and slyph.org.
how.com.vn at least partially shares name servers with other domains, for instance stateofsearch.com, stackskills.com, lativstrategicanalytics.click, morfotografcilik.com and ahaalyee.com.
These name servers are commonly used with steven.ns.cloudflare.com, lady.ns.cloudflare.com and will.ns.cloudflare.com.
Host names with six IP numbers:
Host name rose.ns.cloudflare.com points to: 2606:4700:50::adf5:3a8d, 2803:f800:50::6ca2:c08d, 2a06:98c1:50::ac40:208d, 108.162.192.141, 172.64.32.141 and 173.245.58.141.
Host name sid.ns.cloudflare.com points to: 2606:4700:58::adf5:3b8f, 2803:f800:50::6ca2:c18f, 2a06:98c1:50::ac40:218f, 108.162.193.143, 172.64.33.143 and 173.245.59.143.