15721.us - robtex.com

15721.us

DNSSEC⚠️ Not signed
A52.20.165.189🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix
PTRec2-52-20-165-189.compute-1.amazonaws.com
NSns1.parkco2.neustar.biz ⭐
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
A3.227.227.44🇺🇸 Amazon3.224.0.0/12 EC2 IAD prefix
PTRec2-3-227-227-44.compute-1.amazonaws.com
TXTv=spf1 -all
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=1778631414

Same first word

15721.net
15721.us

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57112.xyz

DNS History

20 records (3 active, 17 former)

20162017201820192020202120222023202420252026NSns1.parkco2.neustar.bizns2.parkco2.neustar.bizA52.20.165.189107.21.31.83174.129.53.418.213.233.23452.1.135.25052.1.72.10852.20.55.1952.201.96.2352.21.0.5752.3.92.1352.6.37.1052.7.114.5152.7.171.20954.174.245.7454.210.234.193CNAMEpr-zipcodes-us.neuweb.bizws-pr-web-zipcodes-525549249.us-east-1.elb.amazonaws.comzip-lb.neuweb.biz
●NSns1.parkco2.neustar.biz2026-04-03 → 2026-05-13 · 2 obs
● 2026-04-03 13:42:28
● 2026-05-13 00:39:32
●NSns2.parkco2.neustar.biz2026-04-03 → 2026-05-13 · 2 obs
● 2026-04-03 13:42:28
● 2026-05-13 00:39:32
○A107.21.31.832016-01-25 → 2016-01-25 · 4 obs
○ 2015-11-08 01:21:34
● 2016-01-25 04:06:04
○ 2016-04-26 19:12:44
○ 2026-05-13 00:39:32
○A174.129.53.42026-04-18 → 2026-04-18 · 3 obs
○ 2026-04-13 07:13:24
● 2026-04-18 00:53:56
○ 2026-05-13 00:39:32
○A18.213.233.2342026-04-13 → 2026-04-13 · 4 obs
○ 2018-07-28 21:24:36
● 2026-04-13 07:13:24
○ 2026-04-18 00:53:56
○ 2026-05-13 00:39:32
○A52.1.135.2502015-11-08 → 2015-11-08 · 4 obs
○ 2015-07-08 13:19:26
● 2015-11-08 01:21:34
○ 2016-01-25 04:06:04
○ 2026-05-13 00:39:32
○A52.1.72.1082016-04-26 → 2016-04-26 · 4 obs
○ 2016-01-25 04:06:04
● 2016-04-26 19:12:44
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
●A52.20.165.1892026-05-13 → 2026-05-13 · 2 obs
○ 2026-04-18 00:53:56
● 2026-05-13 00:39:32
○A52.20.55.192015-11-08 → 2015-11-08 · 4 obs
○ 2015-07-08 13:19:26
● 2015-11-08 01:21:34
○ 2016-01-25 04:06:04
○ 2026-05-13 00:39:32
○A52.201.96.232016-04-26 → 2016-04-26 · 4 obs
○ 2016-01-25 04:06:04
● 2016-04-26 19:12:44
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○A52.21.0.572015-11-08 → 2015-11-08 · 4 obs
○ 2015-07-08 13:19:26
● 2015-11-08 01:21:34
○ 2016-01-25 04:06:04
○ 2026-05-13 00:39:32
○A52.3.92.132016-04-26 → 2016-04-26 · 4 obs
○ 2016-01-25 04:06:04
● 2016-04-26 19:12:44
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○A52.6.37.102016-01-25 → 2016-01-25 · 4 obs
○ 2015-11-08 01:21:34
● 2016-01-25 04:06:04
○ 2016-04-26 19:12:44
○ 2026-05-13 00:39:32
○A52.7.114.512015-07-08 → 2015-07-08 · 3 obs
● 2015-07-08 13:19:26
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○A52.7.171.2092015-07-08 → 2015-07-08 · 3 obs
● 2015-07-08 13:19:26
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○A54.174.245.742016-01-25 → 2016-01-25 · 4 obs
○ 2015-11-08 01:21:34
● 2016-01-25 04:06:04
○ 2016-04-26 19:12:44
○ 2026-05-13 00:39:32
○A54.210.234.1932015-07-08 → 2015-07-08 · 3 obs
● 2015-07-08 13:19:26
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○CNAMEpr-zipcodes-us.neuweb.biz2015-11-08 → 2016-04-26 · 5 obs
○ 2015-07-08 13:19:26
● 2015-11-08 01:21:34
● 2016-04-26 19:12:44
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○CNAMEws-pr-web-zipcodes-525549249.us-east-1.elb.amazonaws.com2015-11-08 → 2016-04-26 · 5 obs
○ 2015-07-08 13:19:26
● 2015-11-08 01:21:34
● 2016-04-26 19:12:44
○ 2018-07-28 21:24:36
○ 2026-05-13 00:39:32
○CNAMEzip-lb.neuweb.biz2015-07-08 → 2018-07-28 · 4 obs
● 2015-07-08 13:19:26
● 2018-07-28 21:24:36
○ 2026-04-03 13:42:28
○ 2026-05-13 00:39:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usy.cctld.us, w.cctld.us, b.cctld.us, x.cctld.us...-
15721.usns1.parkco2.neustar.biz, ns2.parkco2.neustar.biz-

✅ Authoritative Response

Server:3.227.227.44

NS records: ns1.parkco2.neustar.biz, ns2.parkco2.neustar.biz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 15721.us (unsigned zone)

⏱️ Timing

Total: 511ms | Queries: -

📄 Records

TypeCountSample Data
A132.194.99.109
NS2ns2.parkco2.neustar.biz, ns1.parkco2.neustar.biz
TXT1v=spf1 -all
SOA1ns1.parkco2.neustar.biz hostmaster.neust

Analysis

IP Addresses

15721.us resolves to a single IP: 52.20.165.189.

Other host names, for instance 73005.us, 90099.us, 86931.us, 18108.us and 11183.us share IP numbers with 15721.us.

Name Servers

15721.us has two name servers: ns1.parkco2.neustar.biz and ns2.parkco2.neustar.biz.

15721.us shares the same name server setup as other domains, for example 40285.us, 32839.us, 00305.us, 48321.us and 53008.us.

Host names with a single IP:

ns1.parkco2.neustar.biz points to 3.220.94.231

ns2.parkco2.neustar.biz points to 3.227.227.44