`flashcards.pt`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3032::ac43:9f96^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:4273^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.66.115^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.159.150^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`donovan.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c72^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donovan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c372^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`donovan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2372^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`donovan.ns.cloudflare.com`
		A	108.162.195.114^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donovan.ns.cloudflare.com`
		A	162.159.44.114^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donovan.ns.cloudflare.com`
		A	172.64.35.114^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donovan.ns.cloudflare.com`
NS	`isabel.ns.cloudflare.com`
		A	2606:4700:50::a29f:2668^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c268^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`isabel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2268^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`isabel.ns.cloudflare.com`
		A	108.162.194.104^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	162.159.38.104^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	172.64.34.104^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
MX	`route3.mx.cloudflare.net` ⭐
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁹¹⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽⁹⁷⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
TXT	`v=spf1 include:_spf.mx.cloudflare.net -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.66.115, 172.67.159.150
		IPv6 hints	2606:4700:3032::ac43:9f96, 2606:4700:3036::6815:4273
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=64, name=cloudflare-ech.com
SOA	`donovan.ns.cloudflare.com`dns@cloudflare.com serial=2411382296

`pt`

	DNSSEC	🔒 Signed (DS record present)
	NS	`curiosity.dns.pt` ⭐
	NS	`a.dns.pt`
	NS	`b.dns.pt`
	NS	`c.dns.pt`
	NS	`d.dns.pt`
	NS	`e.dns.pt`
	NS	`g.dns.pt`
	NS	`h.dns.pt`
	NS	`ns.dns.br`
	NS	`ns2.nic.fr`
	SOA	`curiosity.dns.pt`request@dns.pt 2026-08-05 #26

🔒 HSTS Preload (+subdomains)

Same first word

Similar names

cardsflash.com

cardsflash.net

arcflashsd.com

cardsflash.org

cardsflash.info

DNS History

9 records (9 active, 0 former)

●NSdonovan.ns.cloudflare.com2026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●NSisabel.ns.cloudflare.com2026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●MXroute1.mx.cloudflare.net2026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●MXroute2.mx.cloudflare.net2026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●MXroute3.mx.cloudflare.net2026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●A104.21.66.1152026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●A172.67.159.1502026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●A2606:4700:3032::ac43:9f962026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

●A2606:4700:3036::6815:42732026-07-03 → 2026-08-05 · 2 obs

● 2026-07-03 12:38:32
● 2026-08-05 12:50:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pt	a.dns.pt, b.dns.pt, c.dns.pt, d.dns.pt...	-
flashcards.pt	donovan.ns.cloudflare.com, isabel.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.35.114

NS records: donovan.ns.cloudflare.com, isabel.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1443ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.159.150, 104.21.66.115`
AAAA	2	`2606:4700:3032::ac43:9f96, 2606:4700:3036::6815:4273`
NS	2	`isabel.ns.cloudflare.com, donovan.ns.cloudflare.com`
MX	3	`route3.mx.cloudflare.net (pri: 4), route2.mx.cloudflare.net (pri: 91)...`
TXT	1	`v=spf1 include:_spf.mx.cloudflare.net -a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`donovan.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

flashcards.pt has four IP addresses: 104.21.66.115, 172.67.159.150, 2606:4700:3032::ac43:9f96 and 2606:4700:3036::6815:4273.

Two other host names, along with wangxi.org, susuzilas.com and webmail.reaspack.cz, also share IP numbers with flashcards.pt.

Name Servers

Two name servers handle the delegation for flashcards.pt: donovan.ns.cloudflare.com and isabel.ns.cloudflare.com.

flashcards.pt shares its NS records with other domains, for example freeup.app, expert-de.app, cdn.livemore24.de and two others.

flashcards.pt shares at least some of its name servers with other domains, including nncj.cn, josscasino71.com, 5gff.buzz and two others.

These name servers are frequently paired with the name servers bruce.ns.cloudflare.com and celine.ns.cloudflare.com.

DNS names with 6 IP addresses:

donovan.ns.cloudflare.com resolves to 108.162.195.114, 162.159.44.114 and 172.64.35.114 among others, with 3 other IP addresses in total.

isabel.ns.cloudflare.com resolves to 108.162.194.104, 162.159.38.104 and 172.64.34.104 among others, with 3 other IP addresses in total.

Mail Servers

flashcards.pt is handled by three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

There is at least a partial MX overlap between flashcards.pt and other domains, including ecuadorianliterature.com, birthdayshoes.com, entradafan.com.ar and two others.

DNS names with 6 IP addresses:

route1.mx.cloudflare.net resolves to 162.159.205.11, 162.159.205.12 and 162.159.205.13 among others, with 3 other IP addresses in total.

route2.mx.cloudflare.net resolves to 162.159.205.17, 162.159.205.18 and 162.159.205.19 among others, with 3 other IP addresses in total.

route3.mx.cloudflare.net resolves to 162.159.205.23, 162.159.205.24 and 162.159.205.25 among others, with 3 other IP addresses in total.

flashcards.pt - robtex.com

flashcards.pt

pt

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`flashcards.pt`

`pt`