`duolztw.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:4096^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:9820^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.64.150^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.152.32^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`donna.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a97^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donna.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c097^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`donna.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2097^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`donna.ns.cloudflare.com`
		A	108.162.192.151^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donna.ns.cloudflare.com`
		A	172.64.32.151^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donna.ns.cloudflare.com`
		A	173.245.58.151^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donna.ns.cloudflare.com`
NS	`nash.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bd1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nash.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1d1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`nash.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21d1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`nash.ns.cloudflare.com`
		A	108.162.193.209^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nash.ns.cloudflare.com`
		A	172.64.33.209^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nash.ns.cloudflare.com`
		A	173.245.59.209^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nash.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.64.150, 172.67.152.32
		IPv6 hints	2606:4700:3033::6815:4096, 2606:4700:3037::ac43:9820
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=236, name=cloudflare-ech.com
SOA	`donna.ns.cloudflare.com`dns@cloudflare.com serial=2409816166

`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.net`nstld@verisign-grs.com serial=1784538052

Subdomains

www.duolztw.com

Same first word

duolztw.com

DNS History

17 records (6 active, 11 former)

○NSa.share-dns.com2026-05-25 → 2026-07-20 · 2 obs

○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

○NSb.share-dns.net2026-05-25 → 2026-07-20 · 2 obs

○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

○NSdns.bizcn.com2015-06-13 → 2016-12-03 · 4 obs

● 2015-06-13 08:57:12
● 2016-12-03 22:54:16
○ 2018-07-19 16:13:44
○ 2026-07-20 09:23:08

●NSdonna.ns.cloudflare.com2026-05-25 → 2026-07-20 · 3 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-07-20 09:23:08

○NSf1g1ns1.dnspod.net2018-07-19 → 2018-07-19 · 4 obs

○ 2016-12-03 22:54:16
● 2018-07-19 16:13:44
○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

○NSf1g1ns2.dnspod.net2018-07-19 → 2018-07-19 · 4 obs

○ 2016-12-03 22:54:16
● 2018-07-19 16:13:44
○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

●NSnash.ns.cloudflare.com2026-05-25 → 2026-07-20 · 3 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-07-20 09:23:08

○NSns1.4everdns.com2015-06-13 → 2016-12-03 · 4 obs

● 2015-06-13 08:57:12
● 2016-12-03 22:54:16
○ 2018-07-19 16:13:44
○ 2026-07-20 09:23:08

○NSns2.4everdns.com2015-06-13 → 2016-12-03 · 4 obs

● 2015-06-13 08:57:12
● 2016-12-03 22:54:16
○ 2018-07-19 16:13:44
○ 2026-07-20 09:23:08

●A104.21.64.1502026-05-25 → 2026-07-20 · 3 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-07-20 09:23:08

○A154.85.226.2202018-07-19 → 2018-07-19 · 4 obs

○ 2016-12-03 22:54:16
● 2018-07-19 16:13:44
○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

○A172.121.39.2322026-05-25 → 2026-07-20 · 2 obs

○ 2026-05-25 03:18:58
○ 2026-07-20 09:23:08

●A172.67.152.322026-05-25 → 2026-07-20 · 3 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-07-20 09:23:08

○A2606:4700:3032::6815:40962026-05-25 → 2026-06-17 · 5 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-06-17 00:58:50
○ 2026-06-20 01:59:02
○ 2026-07-20 09:23:08

●A2606:4700:3033::6815:40962026-06-20 → 2026-07-20 · 3 obs

○ 2026-06-17 00:58:50
● 2026-06-20 01:59:02
● 2026-07-20 09:23:08

●A2606:4700:3037::ac43:98202026-05-25 → 2026-07-20 · 3 obs

○ 2018-07-19 16:13:44
● 2026-05-25 03:18:58
● 2026-07-20 09:23:08

○A58.64.204.492015-06-13 → 2016-12-03 · 4 obs

● 2015-06-13 08:57:12
● 2016-12-03 22:54:16
○ 2018-07-19 16:13:44
○ 2026-07-20 09:23:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, h.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net...	-
duolztw.com	donna.ns.cloudflare.com, nash.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.209

NS records: donna.ns.cloudflare.com, nash.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duolztw.com (unsigned zone)

⏱️ Timing

Total: 199ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.152.32, 104.21.64.150`
AAAA	2	`2606:4700:3033::6815:4096, 2606:4700:3037::ac43:9820`
NS	2	`donna.ns.cloudflare.com, nash.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`donna.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (donna.ns.cloudflare.com, donna.ns.cloudflare.com, donna.ns.cloudflare.com...)

Analysis

Hierarchy

duolztw.com is the parent zone for www.duolztw.com.

IP Addresses

duolztw.com has four IP addresses: 104.21.64.150, 172.67.152.32, 2606:4700:3033::6815:4096 and 2606:4700:3037::ac43:9820.

iredia-idahosa.cabanova.com, appledirectory.klanningar.cabanova.com, knowabouthalocigsreview.cabanova.com plus two other host names have IP numbers in common with duolztw.com.

Name Servers

duolztw.com is delegated to two name servers: donna.ns.cloudflare.com and nash.ns.cloudflare.com.

The name server configuration of duolztw.com is shared with other domains, for instance galerie-girard.com, cacmsrnd.com, c-god.net and two others.

duolztw.com partially shares its NS delegation with several other domains, including praxisdienst.it, modernloveconnection.com, carrefour.co.il and two others.

The name servers bayan.ns.cloudflare.com, aspen.ns.cloudflare.com, meiling.ns.cloudflare.com and moura.ns.cloudflare.com are often found in use alongside these name servers.

Hosts with 6 IP addresses each:

donna.ns.cloudflare.com resolves to 108.162.192.151, 172.64.32.151, 173.245.58.151 and 3 other IP addresses.

nash.ns.cloudflare.com resolves to 108.162.193.209, 172.64.33.209, 173.245.59.209 and 3 other IP addresses.

duolztw.com - robtex.com

duolztw.com

com

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

`duolztw.com`

`com`