`4instructor.com`

	CNAME	`whenhowlee.github.io`
	DNSSEC	⚠️ Not signed
	A	2606:50c0:8000::153^{🇺🇸 Fastly2606:50c0:8000::/48 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8001::153^{🇺🇸 Fastly2606:50c0:8001::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8002::153^{🇺🇸 Fastly2606:50c0:8002::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8003::153^{🇺🇸 Fastly2606:50c0:8003::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
	A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
	A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
	A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}

`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

DNS History

7 records (3 active, 4 former)

●NSdns19.hichina.com2015-08-06 → 2026-03-16 · 2 obs

● 2015-08-06 20:12:34
● 2026-03-16 21:02:22

●NSdns20.hichina.com2015-08-06 → 2026-03-16 · 2 obs

● 2015-08-06 20:12:34
● 2026-03-16 21:02:22

○A101.200.192.1052015-08-06 → 2016-02-29 · 4 obs

● 2015-08-06 20:12:34
● 2016-02-29 03:05:44
○ 2016-06-29 05:45:06
○ 2026-03-16 21:02:22

○A151.101.60.1332016-06-29 → 2017-02-15 · 5 obs

○ 2016-02-29 03:05:44
● 2016-06-29 05:45:06
● 2017-02-15 09:24:02
○ 2019-03-21 08:49:42
○ 2026-03-16 21:02:22

○CNAMEgithub.map.fastly.net2016-06-29 → 2017-02-15 · 4 obs

● 2016-06-29 05:45:06
● 2017-02-15 09:24:02
○ 2019-03-21 08:49:42
○ 2026-03-16 21:02:22

○CNAMEprod.github.map.fastlylb.net2016-06-29 → 2016-06-29 · 3 obs

● 2016-06-29 05:45:06
○ 2017-02-15 09:24:02
○ 2026-03-16 21:02:22

●CNAMEwhenhowlee.github.io2016-06-29 → 2026-03-16 · 2 obs

● 2016-06-29 05:45:06
● 2026-03-16 21:02:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, g.gtld-servers.net, d.gtld-servers.net, i.gtld-servers.net...	-
4instructor.com	dns19.hichina.com, dns20.hichina.com	18 records

✅ Authoritative Response

Server: 120.76.107.38

NS records: dns19.hichina.com, dns20.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4instructor.com (unsigned zone)

⏱️ Timing

Total: 486ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns19.hichina.com, dns20.hichina.com`
CNAME	1	`whenhowlee.github.io`
SOA	1	`dns19.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns19.hichina.com, dns19.hichina.com, dns19.hichina.com...)

Analysis

IP Addresses

4instructor.com resolves to eight IP numbers: 2606:50c0:8000::153, 2606:50c0:8001::153, 2606:50c0:8002::153, 2606:50c0:8003::153, 185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153.

Other host names, for instance wannacryransomware.github.io, varnit.com, efan.ru, high-authority-backlink-automation-for-seo-experts.html.html.demo.backlink-generator-tool.backlink-generator-tool.github.io and payal836.github.io share IP numbers with 4instructor.com.

4instructor.com - robtex.com

4instructor.com

com