`f1study.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:a7be^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::6815:5a46^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.90.70^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.167.190^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`cash.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b51^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c151^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`cash.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2151^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`cash.ns.cloudflare.com`
		A	108.162.193.81^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	172.64.33.81^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	173.245.59.81^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
NS	`phoenix.ns.cloudflare.com`
		A	2606:4700:50::a29f:26c9^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phoenix.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2c9^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`phoenix.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22c9^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`phoenix.ns.cloudflare.com`
		A	108.162.194.201^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phoenix.ns.cloudflare.com`
		A	162.159.38.201^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phoenix.ns.cloudflare.com`
		A	172.64.34.201^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phoenix.ns.cloudflare.com`
MX	`_dc-mx.06a183c18265.f1study.com` ⭐
		A	198.251.89.129^{🇱🇺 FRANTECH198.251.89.0/24 More specific route}
			PTR	`ws1.noc532.com`
TXT	`v=spf1 +a +mx +ip4:165.140.69.90 +include:relay.mailchannels.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.90.70, 172.67.167.190
		IPv6	2606:4700:3031::ac43:a7be, 2606:4700:3033::6815:5a46
SOA	`cash.ns.cloudflare.com`dns@cloudflare.com serial=2396634632

`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

WOT: SAFE (72/100)

Same first word

f1study.com

DNS History

12 records (7 active, 5 former)

●NScash.ns.cloudflare.com2026-03-14 → 2026-03-14 · 3 obs

○ 2015-08-29 20:38:10
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

○NSns.wahju.com2015-08-29 → 2015-08-29 · 3 obs

● 2015-08-29 20:38:10
○ 2026-03-14 05:30:24
○ 2026-03-14 10:12:36

○NSns2.wahju.com2015-08-29 → 2015-08-29 · 3 obs

● 2015-08-29 20:38:10
○ 2026-03-14 05:30:24
○ 2026-03-14 10:12:36

●NSphoenix.ns.cloudflare.com2026-03-14 → 2026-03-14 · 3 obs

○ 2015-08-29 20:38:10
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

●MX_dc-mx.06a183c18265.f1study.com2026-03-14 → 2026-03-14 · 3 obs

○ 2015-08-29 20:38:10
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

○MXmail.f1study.com2015-08-29 → 2015-08-29 · 3 obs

● 2015-08-29 20:38:10
○ 2026-03-14 05:30:24
○ 2026-03-14 10:12:36

●A104.21.90.702026-03-14 → 2026-03-14 · 3 obs

○ 2016-12-10 15:54:54
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

●A172.67.167.1902026-03-14 → 2026-03-14 · 3 obs

○ 2016-12-10 15:54:54
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

○A208.70.161.2262015-09-15 → 2016-12-10 · 5 obs

○ 2015-08-29 20:38:10
● 2015-09-15 08:28:00
● 2016-12-10 15:54:54
○ 2026-03-14 05:30:24
○ 2026-03-14 10:12:36

●A2606:4700:3031::ac43:a7be2026-03-14 → 2026-03-14 · 3 obs

○ 2016-12-10 15:54:54
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

●A2606:4700:3033::6815:5a462026-03-14 → 2026-03-14 · 3 obs

○ 2016-12-10 15:54:54
● 2026-03-14 05:30:24
● 2026-03-14 10:12:36

○A63.223.75.1702015-08-29 → 2015-08-29 · 3 obs

● 2015-08-29 20:38:10
○ 2015-09-15 08:28:00
○ 2026-03-14 10:12:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
f1study.com	cash.ns.cloudflare.com, phoenix.ns.cloudflare.com	12 records

✅ Authoritative Response

Server: 108.162.193.81

NS records: cash.ns.cloudflare.com, phoenix.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f1study.com (unsigned zone)

⏱️ Timing

Total: 190ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.167.190, 104.21.90.70`
AAAA	2	`2606:4700:3031::ac43:a7be, 2606:4700:3033::6815:5a46`
NS	2	`cash.ns.cloudflare.com, phoenix.ns.cloudflare.com`
MX	1	`_dc-mx.06a183c18265.f1study.com (pri: 0)`
TXT	1	`v=spf1 +a +mx +ip4:165.140.69.90 +includ`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`cash.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

f1study.com maps to four IP numbers: 2606:4700:3031::ac43:a7be, 2606:4700:3033::6815:5a46, 104.21.90.70 and 172.67.167.190.

Other host names, for instance everanime.vze.com, 208888.cn, www.ewec2010proceedings.info, damdang.vze.com and h29.uk share IP numbers with f1study.com.

Name Servers

Two name servers cash.ns.cloudflare.com and phoenix.ns.cloudflare.com handle delegation for f1study.com.

f1study.com uses the same name server setup as other domains, for example emuzeum.hu, collegesportingnews.net, matsuritimes.com, buzancentre.com and radioq.hu.

f1study.com partially shares name servers with other domains; examples include tablatunes.com, vnnusa.net, grayt30a.com, testiclecoin.lat and lssmsc.com.

These name servers are commonly used with the name servers lamar.ns.cloudflare.com, sreeni.ns.cloudflare.com, jessica.ns.cloudflare.com, leo.ns.cloudflare.com and jerry.ns.cloudflare.com.

Host names with six IP numbers: cash.ns.cloudflare.com points to: 2606:4700:58::adf5:3b51, 2803:f800:50::6ca2:c151, 2a06:98c1:50::ac40:2151, 108.162.193.81, 172.64.33.81 and 173.245.59.81; phoenix.ns.cloudflare.com points to: 2606:4700:50::a29f:26c9, 2803:f800:50::6ca2:c2c9, 2a06:98c1:50::ac40:22c9, 108.162.194.201, 162.159.38.201 and 172.64.34.201.

Mail Servers

f1study.com is handled by a single mail server, _dc-mx.06a183c18265.f1study.com.

_dc-mx.06a183c18265.f1study.com points to a single IP: 198.251.89.129.

f1study.com - robtex.com

f1study.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`f1study.com`

`com`