instructorcentral.info - robtex.com

instructorcentral.info

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:53c7🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:b509🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.83.199Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.181.9🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkai.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3bbc🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A2803:f800:50::6ca2:c1bc🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRkai.ns.cloudflare.com
A2a06:98c1:50::ac40:21bc🇺🇸 Cloudflare2a06:98c1:50::/45
PTRkai.ns.cloudflare.com
A108.162.193.188🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A172.64.33.188🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A173.245.59.188🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
NSveronica.ns.cloudflare.com
A2606:4700:50::a29f:26ad🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRveronica.ns.cloudflare.com
A2803:f800:50::6ca2:c2ad🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRveronica.ns.cloudflare.com
A2a06:98c1:50::ac40:22ad🇺🇸 Cloudflare2a06:98c1:50::/45
PTRveronica.ns.cloudflare.com
A108.162.194.173🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRveronica.ns.cloudflare.com
A162.159.38.173Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRveronica.ns.cloudflare.com
A172.64.34.173🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRveronica.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.83.199, 172.67.181.9
IPv62606:4700:3036::6815:53c7, 2606:4700:3037::ac43:b509
SOAkai.ns.cloudflare.comdns@cloudflare.com serial=2399571317

info

DNSSEC🔒 Signed (DS record present)
NSa0.info.afilias-nst.info ⭐
NSa2.info.afilias-nst.info
NSb0.info.afilias-nst.org ⚠️ Not in parent delegation
NSb2.info.afilias-nst.org ⚠️ Not in parent delegation
NSc0.info.afilias-nst.info
NSd0.info.afilias-nst.org ⚠️ Not in parent delegation
SOAa0.info.afilias-nst.infohostmaster@donuts.email serial=1774441558

Same first word

instructorcentral.net
instructorcentral.info

DNS History

11 records (6 active, 5 former)

20162017201820192020202120222023202420252026NSkai.ns.cloudflare.comveronica.ns.cloudflare.comns21.domaincontrol.comns22.domaincontrol.comMXmailstore1.secureserver.netsmtp.secureserver.netA104.21.83.199172.67.181.92606:4700:3036::6815:53c72606:4700:3037::ac43:b50950.63.202.56
●NSkai.ns.cloudflare.com2026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
○NSns21.domaincontrol.com2015-08-02 → 2017-03-29 · 3 obs
● 2015-08-02 01:20:50
● 2017-03-29 22:15:52
○ 2026-03-25 12:34:48
○NSns22.domaincontrol.com2015-08-02 → 2017-03-29 · 3 obs
● 2015-08-02 01:20:50
● 2017-03-29 22:15:52
○ 2026-03-25 12:34:48
●NSveronica.ns.cloudflare.com2026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
○MXmailstore1.secureserver.net2015-08-02 → 2017-03-29 · 3 obs
● 2015-08-02 01:20:50
● 2017-03-29 22:15:52
○ 2026-03-25 12:34:48
○MXsmtp.secureserver.net2015-08-02 → 2017-03-29 · 3 obs
● 2015-08-02 01:20:50
● 2017-03-29 22:15:52
○ 2026-03-25 12:34:48
●A104.21.83.1992026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
●A172.67.181.92026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
●A2606:4700:3036::6815:53c72026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
●A2606:4700:3037::ac43:b5092026-03-25 → 2026-03-25 · 2 obs
○ 2017-03-29 22:15:52
● 2026-03-25 12:34:48
○A50.63.202.562015-08-02 → 2017-03-29 · 3 obs
● 2015-08-02 01:20:50
● 2017-03-29 22:15:52
○ 2026-03-25 12:34:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
infoa0.info.afilias-nst.info, a2.info.afilias-nst.info, c0.info.afilias-nst.info-
instructorcentral.infoveronica.ns.cloudflare.com, kai.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.188

NS records: veronica.ns.cloudflare.com, kai.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructorcentral.info (unsigned zone)

⏱️ Timing

Total: 336ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.83.199, 172.67.181.9
AAAA22606:4700:3037::ac43:b509, 2606:4700:3036::6815:53c7
NS2kai.ns.cloudflare.com, veronica.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1kai.ns.cloudflare.com dns.cloudflare.com

Analysis

IP Addresses

instructorcentral.info refers to four IP numbers: 2606:4700:3036::6815:53c7, 2606:4700:3037::ac43:b509, 104.21.83.199 and 172.67.181.9.

Other host names, for instance fiac.dk, hengli88.com.cn, ab98e03189d5.spgits.com, www.intigratech.com and emultimediatv.com share IP numbers with instructorcentral.info.

Name Servers

instructorcentral.info's delegation uses two name servers: kai.ns.cloudflare.com and veronica.ns.cloudflare.com.

instructorcentral.info uses the same name server setup as other domains, such as platink.com, gunsammocrate.com, pikaboo.org, yudingxuan.com and fyamuergl.com.

instructorcentral.info at least partially shares name servers with other domains, including liyubook.com, ongamenet.com, timorek.ee, parcelous.com and sendahdirect.com.

These name servers are commonly used together with the name servers leah.ns.cloudflare.com, joan.ns.cloudflare.com, sage.ns.cloudflare.com and nick.ns.cloudflare.com.

Host names with six IP numbers:

kai.ns.cloudflare.com points to 2606:4700:58::adf5:3bbc, 2803:f800:50::6ca2:c1bc, 2a06:98c1:50::ac40:21bc, 108.162.193.188, 172.64.33.188 and 173.245.59.188.

veronica.ns.cloudflare.com points to 2606:4700:50::a29f:26ad, 2803:f800:50::6ca2:c2ad, 2a06:98c1:50::ac40:22ad, 108.162.194.173, 162.159.38.173 and 172.64.34.173.