`study.ef.com`

DNSSEC	⚠️ Not signed
NS	`ns3.dnsv4.com` ⚠️ Not in zone NS records
		A	2402:4e00:1470:2::10^{🇨🇳 TENCENT-NET-AP2402:4e00:1400::/40}
		A	1.12.0.24^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.12.0.25^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.13.76.53^{🇨🇳 TENCENT-NET-AP1.13.64.0/18}
		A	36.155.149.53^{🇨🇳 CMNET-Jiangsu-AP36.155.144.0/21 CMI (Customer Route)}
		A	43.134.249.54^{🇸🇬 TENCENT-NET-AP-CN43.134.224.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES}
		A	124.64.205.153^{🇨🇳 CHINA169-BJ124.64.205.0/24}
		A	125.94.59.153^{🇨🇳 CHINANET-BACKBONE125.88.0.0/13 chinanet Guangdong network}
NS	`ns4.dnsv4.com` ⚠️ Not in zone NS records
		A	2402:4e00:111:fff::d^{🇨🇳 TENCENT-NET-AP2402:4e00::/35}
		A	1.12.0.23^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.12.0.26^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	43.130.172.54^{🇸🇬 TENCENT-NET-AP-CN43.130.160.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES}
		A	49.7.107.153^{🇨🇳 CHINA-149.7.64.0/18 China Telecom Beijing Co. Ltd.}
		A	101.227.168.53^{🇨🇳 SHANGHAITELECOM101.227.168.0/23 SHIDC}
		A	111.13.203.53^{🇨🇳 CHINAMOBILE-CN111.13.0.0/16 CMI (Customer Route)}
		A	117.135.128.153^{🇨🇳 CHINAMOBILE-CN117.135.128.0/24 CMI (Customer Route)}
			PTR	`(root)`
		A	163.177.5.53^{🇨🇳 UNICOM-GuangZhou-IDC163.177.5.0/24}
		A	220.196.136.53^{🇨🇳 UNICOM-SHFT-IDC220.196.136.0/24}

`ef.com`

DNSSEC	⚠️ Not signed
A	2a06:98c1:3101::6812:2b4c^{🇺🇸 Cloudflare2a06:98c1:3101::/48} ✓ In HTTPS hints
A	2a06:98c1:310c::ac40:90b4^{🇺🇸 Cloudflare2a06:98c1:310c::/48} ✓ In HTTPS hints
A	104.18.43.76^{Cloudflare104.18.43.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.64.144.180^{🇺🇸 Cloudflare172.64.144.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jihoon.ns.cloudflare.com` ⭐
NS	`tricia.ns.cloudflare.com`
MX	`efcom.mail.protection.outlook.com` ⭐
TXT	`SFMC-ItSDn8I-_WPvDgP5QDjuQCbSdPKgZIJJcL1iuKfk`
TXT	`Sendinblue-code:3b4d41269b4df351be1c8f1189329766`
TXT	`ZOOM_verify_i21AZ_z1RiCfS0dEosj0uw`
TXT	`ZQjWmyMMEAcM2JUKuBCQNaGG/p5Fk3h8ei5G1YIKdmOrNx6GiphKRqgyb3KAf7mRUeIspkoX+L2es...`
TXT	`_361l8dnf91sfr841ds82d3je2fy35t9`
TXT	`_n1erml6nlo4atf8dfskj3fgpy4wnlaq`
TXT	`adobe-idp-site-verification=e647ef23ee05d9b047987fd9e8c8cd2b519bc84349e1f6ddb...`
TXT	`aliyun-site-verification=88317b51-c089-4094-be4c-ac9b98500deb`
TXT	`amazonses:V3vAdLKApvqHOoy6diFc5VRsGzfi3z2tGE0FPg/IDDs=`
TXT	`amazonses:a677pw4glw5rFrEbwGscSc2VElj6Q7gjDYvGjD+Ok8s=`
TXT	`anthropic-domain-verification-b87znz=85aHFIVOvsdkvn71ZFo7izc5o`
TXT	`apple-domain-verification=3_jpDJipYQI4_6yNolBXp0L8QX251AeIRbSmmKigcEE`
TXT	`apple-domain-verification=hr2LYfzQYFUVC7Qf`
TXT	`as=1568111888`
TXT	`asv=7328be92dc8e81d6ae473b8348472e37`
TXT	`atlassian-domain-verification=5/8xNXzJgidFT4+gz1mBv3oO//Imgdn4t7UgwV4v4KcrP1+...`
TXT	`atlassian-domain-verification=7N7voUyjPrLNjbTWcOL65746uUThn5Af8+wfbbwM/zpFMtw...`
TXT	`atlassian-domain-verification=iUyEJfC7rAC91HZbQI9k6+Zo5rQllv2G8IK19dYEzRmthC8...`
TXT	`atlassian-domain-verification=qQgMM8iyVskttk2KlGmktyvHdEMGZF1AkzbCZKYEq4OHW77...`
TXT	`atlassian-domain-verification=zmQ0q8CpyRnSPCtkYxCmzZ1d99cTeAzGIu7dR4EFQOUleEC...`
TXT	`canva-site-verification=pm3R30MVZBfAmd0BNeBAGA`
TXT	`cursor-domain-verification-7vfyg8=7AzgD8A9IIRO1i1t5tFH2XJYW`
TXT	`dnp1cgszf00xq5tlkw3p9p7wl232m9mq`
TXT	`google-site-verification=YifwZA32Cd3BWWmPIqQez_Z5kmHlnzR6Msx-AsrSmKw`
TXT	`google-site-verification=auQ-4DOUjDGrU5X6tpviSwR2ng0xqs7WvMU5kJDPKiU`
TXT	`google-site-verification=s_RxVeIztieRZw1nnozp1QhLxPTUrL2ljGBmDi_-_Po`
TXT	`lastpass-N#23c@htz%W^$UZT!RhgDfdOE7$M&9Km277YjS@ZNWTMDOxd#V@p5RTbC8MI15V$VcnE...`
TXT	`linear-domain-verification=5msk3qv8d29y`
TXT	`lovable_verification=dRdWWMlhd8BWt4SplQnx`
TXT	`miro-verification=c143776b28571137649848a613b058dc31463ca1`
TXT	`mongodb-site-verification=qBXcSoyIwQYkIQYLbgDJ2hHevZey2Ps2`
TXT	`mongodb-site-verification=tyz4iJXYkkT6v9At7hlc64C6A8PuosXu`
TXT	`northpass-domain-verification=fedd3b6d621f033e9e563b678b0770ee`
TXT	`notion-domain-verification=XH1JmClmZIwN9757ZB2qt97UnUxNywtyUgje5S5SVuq`
TXT	`onetrust-domain-verification=42cc6f29b8944d1b829dd4a861404975`
TXT	`pardot848123=1644e8a4968e1386a832d2eaa0f15cea68f2dc4014bd60c10eb7e88e99caff5b`
TXT	`pardot848123=dfa2026bbfbd11501997c14f1e517a954a195a9acc81c56dd18bae3f5b476820`
TXT	`qCEF214/pE8wOgBsipGHcD2y91lM5rS7YAwcIA2ovM7Lxbvm+LGD7lGP//+IDSX5z4bTNn36HYKRO...`
TXT	`qmjjvn6131hdwl0m11bvgbr7hhds1q3t`
TXT	`site24x7-domain-verification=e416a5f9c47ef32e346440561ece9fb3`
TXT	`v=msv1 t=5a826e43b6be0f4da8ab8427e5830d`
TXT	`v=spf1 include:_u.ef.com._spf.smart.ondmarc.com -all`
TXT	`wrike-verification=MjI5MzUxNTplYWM5OTQ4ODA1NTg4ZGNiNmNiMWZjMzk3YmNmOGNiZmY3Mm...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.18.43.76, 172.64.144.180
		IPv6 hints	2a06:98c1:3101::6812:2b4c, 2a06:98c1:310c::ac40:90b4
SOA	`jihoon.ns.cloudflare.com`dns@cloudflare.com serial=2407003608

WOT: SAFE (88/100)
rank #6056 globally
rank #2998 in the tld
WOT: SAFE (88/100)
📈 Tranco rank: #17,242

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DNS History

3 records (2 active, 1 former)

●NSns3.dnsv4.com2026-03-27 → 2026-06-16 · 2 obs

● 2026-03-27 09:55:10
● 2026-06-16 07:45:54

●NSns4.dnsv4.com2026-03-27 → 2026-06-16 · 2 obs

● 2026-03-27 09:55:10
● 2026-06-16 07:45:54

○CNAMEstudy.ef.com.cdn.cloudflare.net2020-03-28 → 2020-03-28 · 3 obs

● 2020-03-28 20:35:26
○ 2026-03-27 09:55:10
○ 2026-06-16 07:45:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net, a.gtld-servers.net...	-
ef.com	tricia.ns.cloudflare.com, jihoon.ns.cloudflare.com	12 records
study.ef.com	ns3.dnsv4.com, ns4.dnsv4.com	-

✅ Authoritative Response

Server:124.64.205.153

NS records: ns3.dnsv4.com, ns4.dnsv4.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ef.com (unsigned zone)

⏱️ Timing

Total: 3376ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 12

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

Analysis

Name Servers

study.ef.com is delegated to two name servers: ns3.dnsv4.com and ns4.dnsv4.com.

study.ef.com shares its name server setup with other domains, including sf-financial.com, jiliguala.com, photo.cctv.com and two others.

study.ef.com partially shares its NS delegation with several other domains, including oppein.com, global-app.net, haosf.com and two others.

In DNS configurations, these name servers often share authority with f1g1ns1.dnspod.net, f1g1ns2.dnspod.net, vip3.alidns.com and 5 other name servers.

Host names with 10 IP numbers:

ns4.dnsv4.com resolves to 1.12.0.23, 1.12.0.26, 43.130.172.54 and 7 other IP addresses.

Host names with 8 IP numbers:

ns3.dnsv4.com resolves to 1.12.0.24, 1.12.0.25, 1.13.76.53 and 5 other IP addresses.

study.ef.com - robtex.com

study.ef.com

ef.com