21st-cf.net - robtex.com

21st-cf.net

DNSSEC⚠️ Not signed
NSdns1.cscdns.net ⭐
A2610:a1:1022::100🇺🇸 MAINT-ID-120082610:a1:1022::/48 Neustar
PTRns1.arcemus.com
PTRkandns06.digitalarchives.com
PTRns1.euro909.com
PTRns2.euro909.com
PTRindom10.indomco.com
PTRindom30.indomco.fr
PTRns1.ascio.net
PTRns3.ascio.net
PTRdns1.cscdns.net
PTRpdns1.cscdns.net
PTRsbdns3.cscdns.net
PTRspdns3.cscdns.net
PTRns0.netnames.net
PTRns1.netnames.net
PTRns3.netnames.net
PTRns5.netnames.net
PTRns7.netnames.net
PTRindom130.indomco.org
PTRns2.domainnetwork.se
PTRns.domainnetwork.se
A156.154.130.100🇺🇸 MAINT-ID-12008156.154.130.0/24 Neustar
PTRns1.arcemus.com
PTRkandns06.digitalarchives.com
PTRns1.euro909.com
PTRns2.euro909.com
PTRindom10.indomco.com
PTRindom30.indomco.fr
PTRns1.ascio.net
PTRns3.ascio.net
PTRdns1.cscdns.net
PTRpdns1.cscdns.net
PTRsbdns3.cscdns.net
PTRspdns3.cscdns.net
PTRns0.netnames.net
PTRns1.netnames.net
PTRns3.netnames.net
PTRns5.netnames.net
PTRns7.netnames.net
PTRindom130.indomco.org
PTRns2.domainnetwork.se
PTRns.domainnetwork.se
NSdns2.cscdns.net
A2610:a1:1023::100🇺🇸 MAINT-ID-120082610:a1:1023::/48 Neustar
PTRns2.arcemus.com
PTRnusdns06.digitalarchives.com
PTRns3.domainnetwork.com
PTRns3.euro909.com
PTRindom80.indomco.hk
PTRns2.ascio.net
PTRns4.ascio.net
PTRdns2.cscdns.net
PTRpdns2.cscdns.net
PTRindom20.indomco.net
PTRns2.netnames.net
PTRns4.netnames.net
PTRns6.netnames.net
PTRns8.netnames.net
A156.154.131.100🇺🇸 MAINT-ID-12008156.154.131.0/24 Neustar
PTRns2.arcemus.com
PTRnusdns06.digitalarchives.com
PTRns3.domainnetwork.com
PTRns3.euro909.com
PTRindom80.indomco.hk
PTRns2.ascio.net
PTRns4.ascio.net
PTRdns2.cscdns.net
PTRpdns2.cscdns.net
PTRindom20.indomco.net
PTRns2.netnames.net
PTRns4.netnames.net
PTRns6.netnames.net
PTRns8.netnames.net
SOAdns1.cscdns.nethostmaster@cscdns.net 2020-03-18 #2

net

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=1776064577

Same first word

21st-cf.biz
21st-cf.org
21st-cf.info
21st-cf.com
21st-cf.net

DNS History

10 records (2 active, 8 former)

2020202120222023202420252026NSdns1.cscdns.netdns2.cscdns.netns1.markmonitor.comns2.markmonitor.comns3.markmonitor.comns4.markmonitor.comns5.markmonitor.comns6.markmonitor.comns7.markmonitor.comA72.52.10.14
●NSdns1.cscdns.net2026-04-09 → 2026-04-13 · 3 obs
○ 2019-01-30 04:09:06
● 2026-04-09 08:18:52
● 2026-04-13 07:17:48
●NSdns2.cscdns.net2026-04-09 → 2026-04-13 · 3 obs
○ 2019-01-30 04:09:06
● 2026-04-09 08:18:52
● 2026-04-13 07:17:48
○NSns1.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns2.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns3.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns4.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns5.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns6.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○NSns7.markmonitor.com2019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48
○A72.52.10.142019-01-30 → 2019-01-30 · 3 obs
● 2019-01-30 04:09:06
○ 2026-04-09 08:18:52
○ 2026-04-13 07:17:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
neth.gtld-servers.net, j.gtld-servers.net, a.gtld-servers.net, i.gtld-servers.net...-
21st-cf.netdns1.cscdns.net, dns2.cscdns.net4 records

✅ Authoritative Response

Server:156.154.130.100

NS records: dns1.cscdns.net, dns2.cscdns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21st-cf.net (unsigned zone)

⏱️ Timing

Total: 224ms | Queries: -

📄 Records

TypeCountSample Data
NS2dns1.cscdns.net, dns2.cscdns.net
SOA1dns1.cscdns.net hostmaster.cscdns.net

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (dns1.cscdns.net, dns1.cscdns.net, dns2.cscdns.net...)

Analysis

Name Servers

21st-cf.net is delegated to two name servers: dns1.cscdns.net and dns2.cscdns.net.

21st-cf.net shares the same name server setup as other domains, for example essentracomponents.lu, xlglobalrisk.org, estacion.com.py, mail2world.fr and 202rentall.com.

21st-cf.net at least partially shares name servers with other domains, for example ourbofa.org and 4.34.163.in-addr.arpa.

Host names with two IP numbers:

dns1.cscdns.net points to 2610:a1:1022::100 and 156.154.130.100

dns2.cscdns.net points to 2610:a1:1023::100 and 156.154.131.100