21400.us - robtex.com

21400.us

DNSSEC⚠️ Not signed
A52.204.121.12🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix
PTRec2-52-204-121-12.compute-1.amazonaws.com
NSns1.parkco2.neustar.biz ⭐ ⚠️ Not in zone NS records
A3.220.94.231🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix
PTRec2-3-220-94-231.compute-1.amazonaws.com
NSns2.parkco2.neustar.biz ⚠️ Not in zone NS records
A3.227.227.44🇺🇸 Amazon3.224.0.0/12 EC2 IAD prefix
PTRec2-3-227-227-44.compute-1.amazonaws.com
SOAns1.parkco2.neustar.bizhostmaster@neustar.biz 2026-03-06 #1

us

DNSSEC🔒 Signed (DS record present)
NSa.cctld.us ⭐
NSb.cctld.us
NSf.cctld.us
NSk.cctld.us
NSm.cctld.us
NSn.cctld.us
NSw.cctld.us
NSx.cctld.us
NSy.cctld.us
SOAa.cctld.usadmin@tldns.godaddy serial=1776089558

Same first word

21400.com
21400.us
21400.cn
21400.de

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DNS History

15 records (3 active, 12 former)

20162017201820192020202120222023202420252026NSns1.parkco2.neustar.bizns2.parkco2.neustar.bizA52.204.121.1252.55.157.24652.6.138.4052.7.114.5152.7.171.20954.164.48.4654.165.136.19054.172.131.9454.210.234.19354.86.223.172CNAMEpr-zipcodes-us.neuweb.bizws-pr-web-zipcodes-525549249.us-east-1.elb.amazonaws.comzip-lb.neuweb.biz
●NSns1.parkco2.neustar.biz2026-04-04 → 2026-04-13 · 2 obs
● 2026-04-04 13:27:12
● 2026-04-13 14:44:54
●NSns2.parkco2.neustar.biz2026-04-04 → 2026-04-13 · 2 obs
● 2026-04-04 13:27:12
● 2026-04-13 14:44:54
●A52.204.121.122026-04-13 → 2026-04-13 · 3 obs
○ 2017-07-03 11:14:06
● 2026-04-13 09:48:10
● 2026-04-13 14:44:54
○A52.55.157.2462016-10-17 → 2016-10-17 · 4 obs
○ 2016-03-22 10:36:34
● 2016-10-17 11:50:56
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○A52.6.138.402015-12-15 → 2015-12-15 · 4 obs
○ 2015-08-18 15:43:24
● 2015-12-15 08:13:04
○ 2016-03-22 10:36:34
○ 2026-04-13 14:44:54
○A52.7.114.512015-08-18 → 2015-08-18 · 3 obs
● 2015-08-18 15:43:24
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○A52.7.171.2092015-08-18 → 2015-08-18 · 3 obs
● 2015-08-18 15:43:24
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○A54.164.48.462016-10-17 → 2016-10-17 · 4 obs
○ 2016-03-22 10:36:34
● 2016-10-17 11:50:56
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○A54.165.136.1902016-03-22 → 2016-03-22 · 4 obs
○ 2015-12-15 08:13:04
● 2016-03-22 10:36:34
○ 2016-10-17 11:50:56
○ 2026-04-13 14:44:54
○A54.172.131.942015-12-15 → 2015-12-15 · 4 obs
○ 2015-08-18 15:43:24
● 2015-12-15 08:13:04
○ 2016-03-22 10:36:34
○ 2026-04-13 14:44:54
○A54.210.234.1932015-08-18 → 2015-08-18 · 3 obs
● 2015-08-18 15:43:24
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○A54.86.223.1722016-10-17 → 2016-10-17 · 4 obs
○ 2016-03-22 10:36:34
● 2016-10-17 11:50:56
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○CNAMEpr-zipcodes-us.neuweb.biz2015-12-15 → 2016-10-17 · 5 obs
○ 2015-08-18 15:43:24
● 2015-12-15 08:13:04
● 2016-10-17 11:50:56
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○CNAMEws-pr-web-zipcodes-525549249.us-east-1.elb.amazonaws.com2015-12-15 → 2016-10-17 · 5 obs
○ 2015-08-18 15:43:24
● 2015-12-15 08:13:04
● 2016-10-17 11:50:56
○ 2017-07-03 11:14:06
○ 2026-04-13 14:44:54
○CNAMEzip-lb.neuweb.biz2015-08-18 → 2017-07-03 · 4 obs
● 2015-08-18 15:43:24
● 2017-07-03 11:14:06
○ 2026-04-04 13:27:12
○ 2026-04-13 14:44:54

🔍 DNS Trace

Analysis

IP Addresses

21400.us maps to IP address 52.204.121.12.

Other host names, for instance 50469.us, 21171.us, 13660.us, 73799.us and 30243.us share IP numbers with 21400.us.

Name Servers

Two name servers ns1.parkco2.neustar.biz and ns2.parkco2.neustar.biz are delegated to 21400.us.

21400.us uses the same name server configuration as other domains, such as 21000.us, 02729.us, 58818.us, 46884.us and 32000.us.

Host names with a single IP address:

ns1.parkco2.neustar.biz points to 3.220.94.231

ns2.parkco2.neustar.biz points to 3.227.227.44