`doublecheck.kr`

DNSSEC	⚠️ Not signed
A	18.161.34.48^{🇺🇸 Amazon18.161.32.0/21}
		PTR	`server-18-161-34-48.bos50.r.cloudfront.net`
A	18.161.34.65^{🇺🇸 Amazon18.161.32.0/21}
A	18.161.34.89^{🇺🇸 Amazon18.161.32.0/21}
A	18.161.34.97^{🇺🇸 Amazon18.161.32.0/21}
NS	`ns-732.awsdns-27.net` ⭐
		A	2600:9000:5302:dc00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-732.awsdns-27.net`
		A	205.251.194.220^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-732.awsdns-27.net`
NS	`ns-1441.awsdns-52.org`
		A	2600:9000:5305:a100::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1441.awsdns-52.org`
		A	205.251.197.161^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1441.awsdns-52.org`
NS	`ns-1651.awsdns-14.co.uk`
		A	2600:9000:5306:7300::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1651.awsdns-14.co.uk`
		A	205.251.198.115^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1651.awsdns-14.co.uk`
NS	`ns-33.awsdns-04.com`
		A	2600:9000:5300:2100::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-33.awsdns-04.com`
		A	205.251.192.33^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-33.awsdns-04.com`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4023:c03::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dy-in-f26.1e100.net`
		A	2607:f8b0:4023:c03::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dy-in-f27.1e100.net`
		A	2607:f8b0:4023:c06::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dz-in-f26.1e100.net`
		A	2607:f8b0:4023:c0d::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dl-in-f26.1e100.net`
		A	74.125.137.26^{🇺🇸 Google74.125.137.0/24}
			PTR	`dy-in-f26.1e100.net`
		A	74.125.137.27^{🇺🇸 Google74.125.137.0/24}
			PTR	`dy-in-f27.1e100.net`
		A	142.250.101.26^{🇺🇸 Google142.250.101.0/24}
			PTR	`dz-in-f26.1e100.net`
		A	142.250.101.27^{🇺🇸 Google142.250.101.0/24}
			PTR	`dz-in-f27.1e100.net`
		A	142.251.2.27^{🇺🇸 Google142.251.2.0/24}
			PTR	`dl-in-f27.1e100.net`
TXT	`google-site-verification=c8Zww_0fog-Bv46dURQ6FVBSC_hEYCRWyrbOqRg1NM0`
SOA	`ns-732.awsdns-27.net`awsdns-hostmaster@amazon.com serial=1

`kr`

	DNSSEC	⚠️ Not signed
	NS	`g.dns.kr` ⭐
	NS	`b.dns.kr`
	NS	`c.dns.kr`
	NS	`d.dns.kr`
	NS	`e.dns.kr`
	NS	`f.dns.kr`
	SOA	`g.dns.kr`domain-manager@nic.or.kr serial=2604230905

Same first word

doublecheck.com.tr

doublecheck.ch

doublecheck.nl

doublecheck.kr

doublecheck.today

doublecheck.org

doublecheck.us

doublecheck.com.br

doublecheck.co

doublecheck.com

doublecheck.jp

doublecheck.es

doublecheck.ca

doublecheck.media

doublecheck.fi

doublecheck.de

doublecheck.se

Similar names

checkdouble.com

DNS History

29 records (9 active, 20 former)

●NSns-1441.awsdns-52.org2026-02-15 → 2026-04-23 · 2 obs

● 2026-02-15 22:10:14
● 2026-04-23 11:44:44

●NSns-1651.awsdns-14.co.uk2026-02-15 → 2026-04-23 · 2 obs

● 2026-02-15 22:10:14
● 2026-04-23 11:44:44

●NSns-33.awsdns-04.com2026-02-15 → 2026-04-23 · 2 obs

● 2026-02-15 22:10:14
● 2026-04-23 11:44:44

●NSns-732.awsdns-27.net2026-02-15 → 2026-04-23 · 2 obs

● 2026-02-15 22:10:14
● 2026-04-23 11:44:44

●MXsmtp.google.com2026-02-15 → 2026-04-23 · 2 obs

● 2026-02-15 22:10:14
● 2026-04-23 11:44:44

○A13.226.238.1022026-02-20 → 2026-03-30 · 17 obs

○ 2026-02-19 11:46:06
● 2026-02-20 04:20:26
○ 2026-02-20 05:01:00
○ 2026-03-02 22:58:16
● 2026-03-03 00:54:32
○ 2026-03-03 01:49:14
○ 2026-03-03 06:27:58
● 2026-03-04 13:27:06
● 2026-03-04 14:25:02
○ 2026-03-04 17:41:52
○ 2026-03-26 14:01:20
● 2026-03-28 13:36:56
○ 2026-03-28 14:15:22
○ 2026-03-29 20:32:44
● 2026-03-30 20:14:40
○ 2026-03-31 02:33:36
○ 2026-04-23 11:44:44

○A13.226.238.1152026-02-20 → 2026-03-30 · 17 obs

○A13.226.238.1162026-02-20 → 2026-03-30 · 17 obs

○A13.226.238.182026-02-20 → 2026-03-30 · 17 obs

●A18.161.34.482026-04-23 → 2026-04-23 · 2 obs

○ 2026-04-20 15:45:00
● 2026-04-23 11:44:44

●A18.161.34.652026-04-23 → 2026-04-23 · 2 obs

○ 2026-04-20 15:45:00
● 2026-04-23 11:44:44

●A18.161.34.892026-04-23 → 2026-04-23 · 2 obs

○ 2026-04-20 15:45:00
● 2026-04-23 11:44:44

●A18.161.34.972026-04-23 → 2026-04-23 · 2 obs

○ 2026-04-20 15:45:00
● 2026-04-23 11:44:44

○A18.65.3.1192026-02-15 → 2026-03-17 · 13 obs

● 2026-02-15 22:10:14
● 2026-02-19 11:46:06
○ 2026-02-20 04:20:26
○ 2026-02-21 22:56:08
● 2026-02-22 00:41:34
○ 2026-02-22 11:43:10
○ 2026-02-24 10:56:22
● 2026-02-26 21:07:46
○ 2026-02-26 22:23:40
○ 2026-03-15 16:56:14
● 2026-03-17 20:56:12
○ 2026-03-18 03:10:44
○ 2026-04-23 11:44:44

○A18.65.3.552026-02-15 → 2026-03-17 · 13 obs

○A18.65.3.652026-02-15 → 2026-03-17 · 13 obs

○A18.65.3.792026-02-15 → 2026-03-17 · 13 obs

○A3.166.160.1222026-03-28 → 2026-04-01 · 13 obs

○ 2026-03-28 13:36:56
● 2026-03-28 14:15:22
○ 2026-03-28 17:49:40
● 2026-03-29 19:20:54
● 2026-03-29 20:32:44
○ 2026-03-30 20:14:40
○ 2026-03-31 04:39:28
● 2026-03-31 11:49:22
○ 2026-03-31 17:30:02
● 2026-03-31 19:16:22
● 2026-04-01 11:25:26
○ 2026-04-01 11:59:22
○ 2026-04-23 11:44:44

○A3.166.160.172026-03-28 → 2026-04-01 · 13 obs

○A3.166.160.402026-03-28 → 2026-04-01 · 13 obs

○A3.166.160.902026-03-28 → 2026-04-01 · 13 obs

○A52.84.118.1242026-02-20 → 2026-04-20 · 31 obs

○ 2026-02-20 04:20:26
● 2026-02-20 05:01:00
● 2026-02-21 22:56:08
○ 2026-02-22 00:41:34
● 2026-02-22 11:43:10
● 2026-02-24 10:56:22
○ 2026-02-26 21:07:46
● 2026-02-26 22:23:40
● 2026-03-02 22:58:16
○ 2026-03-03 00:54:32
● 2026-03-03 01:49:14
● 2026-03-03 06:27:58
○ 2026-03-04 13:27:06
○ 2026-03-04 14:25:02
● 2026-03-04 17:41:52
● 2026-03-15 16:56:14
○ 2026-03-17 20:56:12
● 2026-03-18 03:10:44
● 2026-03-26 14:01:20
○ 2026-03-28 13:36:56
○ 2026-03-28 14:15:22
● 2026-03-28 17:49:40
○ 2026-03-29 19:20:54
○ 2026-03-30 20:14:40
● 2026-03-31 02:33:36
● 2026-03-31 04:39:28
○ 2026-03-31 11:49:22
○ 2026-04-01 11:25:26
● 2026-04-01 11:59:22
● 2026-04-20 15:45:00
○ 2026-04-23 11:44:44

○A52.84.118.252026-02-20 → 2026-04-20 · 31 obs

○A52.84.118.492026-02-20 → 2026-04-20 · 31 obs

○A52.84.118.92026-02-20 → 2026-04-20 · 31 obs

○A54.230.79.1122026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-31 11:49:22
● 2026-03-31 17:30:02
○ 2026-03-31 19:16:22
○ 2026-04-23 11:44:44

○A54.230.79.422026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-31 11:49:22
● 2026-03-31 17:30:02
○ 2026-03-31 19:16:22
○ 2026-04-23 11:44:44

○A54.230.79.752026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-31 11:49:22
● 2026-03-31 17:30:02
○ 2026-03-31 19:16:22
○ 2026-04-23 11:44:44

○A54.230.79.912026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-31 11:49:22
● 2026-03-31 17:30:02
○ 2026-03-31 19:16:22
○ 2026-04-23 11:44:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
kr	g.dns.kr, d.dns.kr, b.dns.kr, c.dns.kr...	10 records
doublecheck.kr	ns-33.awsdns-04.com, ns-1651.awsdns-14.co.uk, ns-1441.awsdns-52.org, ns-732.awsdns-27.net	-

✅ Authoritative Response

Server:205.251.194.220

NS records: ns-33.awsdns-04.com, ns-1651.awsdns-14.co.uk, ns-1441.awsdns-52.org, ns-732.awsdns-27.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for doublecheck.kr (unsigned zone)

⏱️ Timing

Total: 1199ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.161.34.89, 18.161.34.65...`
NS	4	`ns-1441.awsdns-52.org, ns-1651.awsdns-14.co.uk...`
MX	1	`smtp.google.com (pri: 1)`
TXT	1	`google-site-verification=c8Zww_0fog-Bv46`
SOA	1	`ns-732.awsdns-27.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 10

In-bailiwick: 10 (g.dns.kr, f.dns.kr, e.dns.kr...)

Analysis

IP Addresses

doublecheck.kr points to four IP numbers: 18.161.34.48, 18.161.34.65, 18.161.34.89 and 18.161.34.97.

For instance, other host names admin.centray.jp, 146722.measurementapi.com, 174260.measurementapi.com, 191427.measurementapi.com and 170540.measurementapi.com share IP numbers with doublecheck.kr.

Name Servers

doublecheck.kr is delegated to four name servers: ns-33.awsdns-04.com, ns-732.awsdns-27.net, ns-1441.awsdns-52.org and ns-1651.awsdns-14.co.uk.

doublecheck.kr shares name servers with other domains at least partially, for example rs-1347-a.com, massagelearner.com, 146.217.15.in-addr.arpa, spielyeti.de and phroa.net.

These name servers are commonly used together with ns1-24-eu-south-2.ec2-rdns.amazonaws.com, ns2-24-eu-south-2.ec2-rdns.amazonaws.com, ns3-24-eu-south-2.ec2-rdns.amazonaws.com and ns4-24-eu-south-2.ec2-rdns.amazonaws.com.

Host names with two IP numbers:

ns-33.awsdns-04.com points to: 2600:9000:5300:2100::1 and 205.251.192.33

ns-732.awsdns-27.net points to: 2600:9000:5302:dc00::1 and 205.251.194.220

ns-1441.awsdns-52.org points to: 2600:9000:5305:a100::1 and 205.251.197.161

ns-1651.awsdns-14.co.uk points to: 2600:9000:5306:7300::1 and 205.251.198.115

Mail Servers

doublecheck.kr is handled by a single mail server, smtp.google.com.

doublecheck.kr shares the same mail server setup as other domains, for instance derechoglobal.com.mx, rl62.com, hackmag.com, hostweb4u.info and gigeff.com.

doublecheck.kr shares mail servers with other domains at least partially; for instance phoenixcs.org, amcleanbookmakers.com, cic.ac.id, nowlet.com and taiseihome.jp.

Host smtp.google.com points to nine IP numbers: 2607:f8b0:4023:c03::1a, 2607:f8b0:4023:c03::1b, 2607:f8b0:4023:c06::1a, 2607:f8b0:4023:c0d::1a, 74.125.137.26, 74.125.137.27, 142.250.101.26, 142.250.101.27 and 142.251.2.27.

doublecheck.kr - robtex.com

doublecheck.kr

kr

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`doublecheck.kr`

`kr`