bio21st.com - robtex.com

bio21st.com

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:32bf🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:d204🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.50.191Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.210.4🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbill.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b4a🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbill.ns.cloudflare.com
A2803:f800:50::6ca2:c14a🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRbill.ns.cloudflare.com
A2a06:98c1:50::ac40:214a🇺🇸 Cloudflare2a06:98c1:50::/45
PTRbill.ns.cloudflare.com
A108.162.193.74🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbill.ns.cloudflare.com
A172.64.33.74🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbill.ns.cloudflare.com
A173.245.59.74🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbill.ns.cloudflare.com
NShope.ns.cloudflare.com
A2606:4700:50::adf5:3aa3🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhope.ns.cloudflare.com
A2803:f800:50::6ca2:c0a3🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRhope.ns.cloudflare.com
A2a06:98c1:50::ac40:20a3🇺🇸 Cloudflare2a06:98c1:50::/45
PTRhope.ns.cloudflare.com
A108.162.192.163🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhope.ns.cloudflare.com
A172.64.32.163🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhope.ns.cloudflare.com
A173.245.58.163🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhope.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.50.191, 172.67.210.4
IPv62606:4700:3030::6815:32bf, 2606:4700:3033::ac43:d204
SOAbill.ns.cloudflare.comdns@cloudflare.com serial=2396527859

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1774629632

Subdomains

mail.bio21st.com

DNS History

15 records (6 active, 9 former)

200920112013201520172019202120232025NSbill.ns.cloudflare.comhope.ns.cloudflare.comns1.parked.comns13.domaincontrol.comns14.domaincontrol.comns2.parked.comMXmailstore1.secureserver.netsmtp.secureserver.netA104.21.50.191172.67.210.42606:4700:3030::6815:32bf2606:4700:3033::ac43:d2045.249.137.1550.63.202.7869.46.228.35
●NSbill.ns.cloudflare.com2026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
●NShope.ns.cloudflare.com2026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
○NSns1.parked.com2008-03-19 → 2008-03-19 · 3 obs
● 2008-03-19 13:45:08
○ 2015-08-20 19:18:28
○ 2026-03-27 17:04:40
○NSns13.domaincontrol.com2015-08-20 → 2017-03-28 · 4 obs
○ 2008-03-19 13:45:08
● 2015-08-20 19:18:28
● 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
○NSns14.domaincontrol.com2015-08-20 → 2017-03-28 · 4 obs
○ 2008-03-19 13:45:08
● 2015-08-20 19:18:28
● 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
○NSns2.parked.com2008-03-19 → 2008-03-19 · 3 obs
● 2008-03-19 13:45:08
○ 2015-08-20 19:18:28
○ 2026-03-27 17:04:40
○MXmailstore1.secureserver.net2015-08-20 → 2017-03-28 · 4 obs
○ 2008-03-19 13:45:08
● 2015-08-20 19:18:28
● 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
○MXsmtp.secureserver.net2015-08-20 → 2017-03-28 · 4 obs
○ 2008-03-19 13:45:08
● 2015-08-20 19:18:28
● 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
●A104.21.50.1912026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
●A172.67.210.42026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
●A2606:4700:3030::6815:32bf2026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
●A2606:4700:3033::ac43:d2042026-03-27 → 2026-03-27 · 2 obs
○ 2017-03-28 09:20:40
● 2026-03-27 17:04:40
○A5.249.137.152015-08-20 → 2016-07-24 · 5 obs
○ 2008-03-19 13:45:08
● 2015-08-20 19:18:28
● 2016-07-24 23:51:12
○ 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
○A50.63.202.782017-03-28 → 2017-03-28 · 3 obs
○ 2016-07-24 23:51:12
● 2017-03-28 09:20:40
○ 2026-03-27 17:04:40
○A69.46.228.352008-03-19 → 2008-03-19 · 3 obs
● 2008-03-19 13:45:08
○ 2015-08-20 19:18:28
○ 2026-03-27 17:04:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comf.gtld-servers.net, e.gtld-servers.net, a.gtld-servers.net, g.gtld-servers.net...-
bio21st.comhope.ns.cloudflare.com, bill.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.74

NS records: hope.ns.cloudflare.com, bill.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bio21st.com (unsigned zone)

⏱️ Timing

Total: 1644ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.210.4, 104.21.50.191
AAAA22606:4700:3030::6815:32bf, 2606:4700:3033::ac43:d204
NS2bill.ns.cloudflare.com, hope.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1bill.ns.cloudflare.com dns.cloudflare.co

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The parent of mail.bio21st.com is bio21st.com.

IP Addresses

bio21st.com maps to four IP numbers: 2606:4700:3030::6815:32bf, 2606:4700:3033::ac43:d204, 104.21.50.191 and 172.67.210.4.

Other host names, for instance www.orakulcasino.cc, tindxole.com, elitetechnocrats.com, managedfunds.com.au and mail.elcollage.com share IP numbers with bio21st.com.

Name Servers

Two name servers bill.ns.cloudflare.com and hope.ns.cloudflare.com handle delegation for bio21st.com.

bio21st.com uses the same name server setup as other domains, for example zhibense.com, leilaeve.com, szdmbz.com, ovlohas.com and sun8tv.com.

bio21st.com partially shares name servers with other domains; examples include bohemiangypsea.com, wnn7.com, online-hackers.com, planexpress.com.au and wooyah.store.

these name servers are commonly used with the name servers dolly.ns.cloudflare.com.

Host names with six IP numbers: bill.ns.cloudflare.com points to: 2606:4700:58::adf5:3b4a, 2803:f800:50::6ca2:c14a, 2a06:98c1:50::ac40:214a, 108.162.193.74, 172.64.33.74 and 173.245.59.74; hope.ns.cloudflare.com points to: 2606:4700:50::adf5:3aa3, 2803:f800:50::6ca2:c0a3, 2a06:98c1:50::ac40:20a3, 108.162.192.163, 172.64.32.163 and 173.245.58.163.