`duolduo.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:8314^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:9f1^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.9.241^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.131.20^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`chloe.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a55^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c055^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`chloe.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2055^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`chloe.ns.cloudflare.com`
		A	108.162.192.85^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	172.64.32.85^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	173.245.58.85^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
NS	`johnny.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cba^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3ba^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`johnny.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23ba^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`johnny.ns.cloudflare.com`
		A	108.162.195.186^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	162.159.44.186^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	172.64.35.186^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
MX	`mxn.mxhichina.com` ⭐
		A	47.246.136.231^{🇺🇸 Alibaba-Cloud47.246.136.0/22 Alibaba CLoud}
			PTR	`cz-clare.com`
			PTR	`reachsmartdwell.com`
			PTR	`wevolt.tech`
		A	47.246.137.47^{🇺🇸 Alibaba-Cloud47.246.136.0/22 Alibaba CLoud}
			PTR	`ip-47-246-137-47.defastlink.net`
MX	`mxw.mxhichina.com`⁽¹⁰⁾
		A	47.246.99.195^{🇺🇸 Alibaba-Cloud47.246.96.0/22 Proxy-registered route object}
			PTR	`reachsmartdwell.com`
TXT	`1758384585-5000362344`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.9.241, 172.67.131.20
		IPv6	2606:4700:3031::ac43:8314, 2606:4700:3037::6815:9f1
SOA	`chloe.ns.cloudflare.com`dns@cloudflare.com serial=2396721890

`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=1771291435

Up

www.duolduo.com

Same first word

duolduo.com

Similar names

lduoduo.com

DNS History

10 records (8 active, 2 former)

●NSchloe.ns.cloudflare.com2026-02-20 → 2026-02-26 · 3 obs

○ 2016-12-16 02:08:26
● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

○NSdns10.hichina.com2016-12-16 → 2016-12-16 · 3 obs

● 2016-12-16 02:08:26
○ 2026-02-20 00:50:54
○ 2026-02-26 08:27:04

○NSdns9.hichina.com2016-12-16 → 2016-12-16 · 3 obs

● 2016-12-16 02:08:26
○ 2026-02-20 00:50:54
○ 2026-02-26 08:27:04

●NSjohnny.ns.cloudflare.com2026-02-20 → 2026-02-26 · 3 obs

○ 2016-12-16 02:08:26
● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

●MXmxn.mxhichina.com2016-12-16 → 2026-02-26 · 2 obs

● 2016-12-16 02:08:26
● 2026-02-26 08:27:04

●MXmxw.mxhichina.com2016-12-16 → 2026-02-26 · 2 obs

● 2016-12-16 02:08:26
● 2026-02-26 08:27:04

●A104.21.9.2412026-02-20 → 2026-02-26 · 2 obs

● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

●A172.67.131.202026-02-20 → 2026-02-26 · 2 obs

● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

●A2606:4700:3031::ac43:83142026-02-20 → 2026-02-26 · 2 obs

● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

●A2606:4700:3037::6815:9f12026-02-20 → 2026-02-26 · 2 obs

● 2026-02-20 00:50:54
● 2026-02-26 08:27:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
duolduo.com	chloe.ns.cloudflare.com, johnny.ns.cloudflare.com	12 records

✅ Authoritative Response

Server: 108.162.195.186

NS records: chloe.ns.cloudflare.com, johnny.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duolduo.com (unsigned zone)

⏱️ Timing

Total: 176ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.131.20, 104.21.9.241`
AAAA	2	`2606:4700:3037::6815:9f1, 2606:4700:3031::ac43:8314`
NS	2	`chloe.ns.cloudflare.com, johnny.ns.cloudflare.com`
MX	2	`mxw.mxhichina.com (pri: 10), mxn.mxhichina.com (pri: 5)`
TXT	1	`1758384585-5000362344`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`chloe.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

AI analysis

duolduo.com is the parent of www.duolduo.com.

duolduo.com resolves to four IP numbers: 2606:4700:3031::ac43:8314, 2606:4700:3037::6815:9f1, 104.21.9.241 and 172.67.131.20.

other host names for instance educacionrionegro.edu.ar, www.complitech.net, realmsuncharted.com, randp.us and woodslabs.com share IP numbers with duolduo.com.

duolduo.com is delegated to two name servers: chloe.ns.cloudflare.com and johnny.ns.cloudflare.com.

duolduo.com shares the same name server setup as other domains, for example wpslalom.com, maidoerobooks.com, silvercoast-property.com, goodpenguins.com and menuandprices.net.

duolduo.com at least partially shares name servers with other domains, for instance heavyequipmenttransport.com.au, sunlightgood.com, markforged.com, lotteryforever.com and hitclub.stream.

These name servers are commonly used with the name servers robert.ns.cloudflare.com.

Host names with six IP numbers:

chloe.ns.cloudflare.com points to: 2606:4700:50::adf5:3a55, 2803:f800:50::6ca2:c055, 2a06:98c1:50::ac40:2055, 108.162.192.85, 172.64.32.85 and 173.245.58.85; johnny.ns.cloudflare.com points to: 2606:4700:58::a29f:2cba, 2803:f800:50::6ca2:c3ba, 2a06:98c1:50::ac40:23ba, 108.162.195.186, 162.159.44.186 and 172.64.35.186.

duolduo.com is handled by two mail servers: mxn.mxhichina.com and mxw.mxhichina.com.

duolduo.com shares the same mail server setup as other domains, for instance aiwhale.com, dingqidong.com, faiat.com, hyt98.com and edigi.net.

duolduo.com shares mail servers with other domains at least partially, including wigsan.com, 0510sf.com, tessella-global.com, fashiontiy.com and uanbuy.com.

Host names with two IP numbers: mxn.mxhichina.com points to 47.246.136.231 and 47.246.137.47.

Host names with one IP number: mxw.mxhichina.com points to 47.246.99.195.

duolduo.com - robtex.com

duolduo.com

com

Up

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

AI analysis

`duolduo.com`

`com`