`us.core.resolver.com`

DNSSEC	⚠️ Not signed
A	18.155.21.12^{🇺🇸 Amazon18.155.16.0/21}
		PTR	`server-18-155-21-12.gru3.r.cloudfront.net`
A	18.155.21.85^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.115^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.123^{🇺🇸 Amazon18.155.16.0/21}

`core.resolver.com`

	DNSSEC	⚠️ Not signed
	A	13.227.207.12^{🇺🇸 Amazon13.227.200.0/21 - Cloudfront}
	A	13.227.207.59^{🇺🇸 Amazon13.227.200.0/21 - Cloudfront}
	A	13.227.207.85^{🇺🇸 Amazon13.227.200.0/21 - Cloudfront}
	A	13.227.207.89^{🇺🇸 Amazon13.227.200.0/21 - Cloudfront}

Same first word

us.tv

us.barclaycard

us.post

us.ws

us.esq

us.vc

us.com.eg

us.works

us.sv

us.edgesuite.net

us.glass

us.ma

us.tf

us.org.ua

us.jobs

us.de

us.servername.us

us.nf

us.kz

us.pl

us.is

us.com

us.av.tr

us.lt

us.edu.cv

us.fm

us.bike

us.media

us.by

us.id

us.no

us.dk

us.cx

us.st

us.nl

us.events

us.guru

us.hisamitsu

us.dev

us.zone

us.nl.eu.org

us.co

us.s3-website-ap-northeast-1.amazonaws.com

us.s3-website.us-east-2.amazonaws.com

us.taxi

us.builders

us.productions

us.watch

us.fyi

us.luxury

us.academy

us.je

us.bank

us.net

us.s3-website.eu-central-1.amazonaws.com

us.fr

us.kg

us.tt

us.dj

us.s3-website-ap-southeast-1.amazonaws.com

us.tn

us.zip

us.cr

us.ai

us.s3-website-eu-west-1.amazonaws.com

us.com.ua

us.education

us.mk

us.s3-website-us-east-1.amazonaws.com

us.gs

us.gy

us.ly

us.al

us.com.au

us.s3-website-us-west-1.amazonaws.com

us.edu.pl

us.barclays

us.ac.kr

us.uz

us.com.sa

us.ac

us.ee

us.world

us.cc

us.edu

us.ae

us.at

us.ngrok.io

us.af

us.email

us.global.prod.fastly.net

us.s3-website-us-west-2.amazonaws.com

us.uy

us.lv

us.s3-website.ap-northeast-1.amazonaws.com

us.com.ph

us.deals

us.ski

us.casino

us.katowice.pl

us.pe

us.gov

us.info

us.com.tr

us.ua

us.exchange

us.s3.amazonaws.com

us.edu.vn

us.si

us.marketing

us.s3-website.ca-central-1.amazonaws.com

us.su

us.app

us.org

us.eu.org

us.hm

us

us.life

us.fit

us.neustar

us.es

us.awsapps.com

us.fo

us.domains

us.ci

us.biz

us.nu

us.ph

us.tm

us.to

us.edu.kg

us.ht

us.ca

us.akamai.net

us.uk

us.be

us.loans

us.cafe

us.se

us.org.uk

Similar names

su.krakow.pl

su.or.kr

su.am

su.careers

su.kg

su.edu

su.si

su.edu.tr

su.la

su.to

su.pl

su.se

su.lt

su.edu.krd

su.kz

su.edu.et

su.tula.su

su.fo

su.dk

su.com.tr

su.co.uk

su.nu

su.cl

su.k12.tr

su.io

su.digital

su.edu.om

su.org.za

su.ac.th

su.mt

su.de

su.vc

su.gz.cn

su.my

su.com

su.in.th

su.chat

su.net.nz

su.edu.eg

su.net

su.id.lv

su.cz

su.oz.au

su.cx

su.network

su.ac.kr

su.noip.us

su.ink

su.ac.za

su.baby

su.ac.rs

su.co.za

su.cc

su.edu.ly

su.co.kr

su.sg

su.hu

su.nl

su.no

su.edu.ph

DNS History

28 records (4 active, 24 former)

●A18.155.21.1152026-03-28 → 2026-03-30 · 13 obs

○ 2026-03-28 13:43:02
● 2026-03-28 15:38:12
○ 2026-03-28 23:26:18
● 2026-03-29 00:10:44
● 2026-03-29 01:22:38
○ 2026-03-29 03:04:00
○ 2026-03-29 05:07:16
● 2026-03-29 06:17:04
● 2026-03-30 00:15:52
○ 2026-03-30 02:10:58
○ 2026-03-30 04:34:46
● 2026-03-30 08:30:28
● 2026-03-30 13:36:16

●A18.155.21.122026-03-28 → 2026-03-30 · 13 obs

●A18.155.21.1232026-03-28 → 2026-03-30 · 13 obs

●A18.155.21.852026-03-28 → 2026-03-30 · 13 obs

○A18.165.140.302026-03-24 → 2026-03-27 · 11 obs

○ 2026-03-24 02:34:32
● 2026-03-24 13:14:32
○ 2026-03-24 20:42:26
○ 2026-03-25 16:38:06
● 2026-03-26 00:57:46
● 2026-03-26 02:28:40
○ 2026-03-26 03:31:00
○ 2026-03-27 01:39:46
● 2026-03-27 09:12:52
○ 2026-03-27 16:43:32
○ 2026-03-30 13:36:16

○A18.165.140.372026-03-24 → 2026-03-27 · 11 obs

○A18.165.140.672026-03-24 → 2026-03-27 · 11 obs

○A18.165.140.692026-03-24 → 2026-03-27 · 11 obs

○A18.245.162.1072026-03-20 → 2026-03-30 · 35 obs

○ 2026-03-19 10:53:02
● 2026-03-20 02:54:28
● 2026-03-21 17:37:58
○ 2026-03-22 00:04:56
○ 2026-03-22 01:05:24
● 2026-03-22 02:21:08
○ 2026-03-22 03:35:08
● 2026-03-22 22:04:20
○ 2026-03-23 03:21:08
● 2026-03-23 07:21:34
● 2026-03-24 02:34:32
○ 2026-03-24 13:14:32
● 2026-03-24 20:42:26
● 2026-03-25 16:38:06
○ 2026-03-26 00:57:46
○ 2026-03-26 02:28:40
● 2026-03-26 03:31:00
● 2026-03-27 01:39:46
○ 2026-03-27 09:12:52
● 2026-03-27 16:43:32
○ 2026-03-27 19:22:06
● 2026-03-27 23:47:46
○ 2026-03-28 06:34:32
○ 2026-03-28 15:38:12
● 2026-03-28 23:26:18
○ 2026-03-29 00:10:44
○ 2026-03-29 01:22:38
● 2026-03-29 03:04:00
● 2026-03-29 05:07:16
○ 2026-03-29 06:17:04
○ 2026-03-30 00:15:52
● 2026-03-30 02:10:58
● 2026-03-30 04:34:46
○ 2026-03-30 08:30:28
○ 2026-03-30 13:36:16

○A18.245.162.1212026-03-20 → 2026-03-30 · 35 obs

○A18.245.162.462026-03-20 → 2026-03-30 · 35 obs

○A18.245.162.532026-03-20 → 2026-03-30 · 35 obs

○A3.165.232.1022026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-22 00:04:56
● 2026-03-22 01:05:24
○ 2026-03-22 02:21:08
○ 2026-03-30 13:36:16

○A3.165.232.562026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-22 00:04:56
● 2026-03-22 01:05:24
○ 2026-03-22 02:21:08
○ 2026-03-30 13:36:16

○A3.165.232.632026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-22 00:04:56
● 2026-03-22 01:05:24
○ 2026-03-22 02:21:08
○ 2026-03-30 13:36:16

○A3.165.232.692026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-22 00:04:56
● 2026-03-22 01:05:24
○ 2026-03-22 02:21:08
○ 2026-03-30 13:36:16

○A3.167.212.1282026-03-22 → 2026-03-28 · 7 obs

○ 2026-03-22 02:21:08
● 2026-03-22 03:35:08
○ 2026-03-22 22:04:20
○ 2026-03-27 23:47:46
● 2026-03-28 06:34:32
○ 2026-03-28 08:17:54
○ 2026-03-30 13:36:16

○A3.167.212.422026-03-22 → 2026-03-28 · 7 obs

○ 2026-03-22 02:21:08
● 2026-03-22 03:35:08
○ 2026-03-22 22:04:20
○ 2026-03-27 23:47:46
● 2026-03-28 06:34:32
○ 2026-03-28 08:17:54
○ 2026-03-30 13:36:16

○A3.167.212.762026-03-22 → 2026-03-28 · 7 obs

○ 2026-03-22 02:21:08
● 2026-03-22 03:35:08
○ 2026-03-22 22:04:20
○ 2026-03-27 23:47:46
● 2026-03-28 06:34:32
○ 2026-03-28 08:17:54
○ 2026-03-30 13:36:16

○A3.167.212.982026-03-22 → 2026-03-28 · 7 obs

○ 2026-03-22 02:21:08
● 2026-03-22 03:35:08
○ 2026-03-22 22:04:20
○ 2026-03-27 23:47:46
● 2026-03-28 06:34:32
○ 2026-03-28 08:17:54
○ 2026-03-30 13:36:16

○A3.168.132.102026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 10:53:02
○ 2026-03-20 02:54:28
○ 2026-03-30 13:36:16

○A3.168.132.372026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 10:53:02
○ 2026-03-20 02:54:28
○ 2026-03-30 13:36:16

○A3.168.132.432026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 10:53:02
○ 2026-03-20 02:54:28
○ 2026-03-30 13:36:16

○A3.168.132.542026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 10:53:02
○ 2026-03-20 02:54:28
○ 2026-03-30 13:36:16

○A3.171.85.1112026-03-22 → 2026-03-28 · 14 obs

○ 2026-03-21 17:37:58
● 2026-03-22 00:04:56
○ 2026-03-22 01:05:24
○ 2026-03-22 22:04:20
● 2026-03-23 03:21:08
○ 2026-03-23 07:21:34
○ 2026-03-27 16:43:32
● 2026-03-27 19:22:06
○ 2026-03-27 23:47:46
○ 2026-03-28 06:34:32
● 2026-03-28 08:17:54
● 2026-03-28 13:43:02
○ 2026-03-28 15:38:12
○ 2026-03-30 13:36:16

○A3.171.85.1272026-03-22 → 2026-03-28 · 14 obs

○A3.171.85.372026-03-22 → 2026-03-28 · 14 obs

○A3.171.85.382026-03-22 → 2026-03-28 · 14 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
resolver.com	ns-226.awsdns-28.com, ns-796.awsdns-35.net, ns-1118.awsdns-11.org, ns-1967.awsdns-53.co.uk	1 record

✅ Authoritative Response

Server:205.251.195.28

NS records: ns-226.awsdns-28.com, ns-796.awsdns-35.net, ns-1118.awsdns-11.org, ns-1967.awsdns-53.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for resolver.com (unsigned zone)

⏱️ Timing

Total: 245ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.155.21.12, 18.155.21.123...`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-226.awsdns-28.com)

Analysis

IP Addresses

us.core.resolver.com resolves to four IP numbers: 18.155.21.12, 18.155.21.85, 18.155.21.115 and 18.155.21.123.

other host names for instance d2dhg0qrjmmf4c.cloudfront.net, becariosmx.com, intustech.com, school-cents.com and pop-au-cf.dash.pv-cdn.net share IP numbers with us.core.resolver.com.

us.core.resolver.com - robtex.com