firstkor.co.kr - robtex.com

firstkor.co.kr

DNSSEC⚠️ Not signed
A3.163.10.5🇺🇸 Amazon3.163.8.0/22
PTRserver-3-163-10-5.gru3.r.cloudfront.net
A3.163.10.38🇺🇸 Amazon3.163.8.0/22
A3.163.10.70🇺🇸 Amazon3.163.8.0/22
A3.163.10.111🇺🇸 Amazon3.163.8.0/22
NSns-432.awsdns-54.com ⭐
A2600:9000:5301:b000::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront
PTRns-432.awsdns-54.com
A205.251.193.176🇺🇸 Amazon205.251.193.0/24 prefix
PTRns-432.awsdns-54.com
NSns-1241.awsdns-27.org
A2600:9000:5304:d900::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront
PTRns-1241.awsdns-27.org
A205.251.196.217🇺🇸 Amazon205.251.196.0/24 prefix
PTRns-1241.awsdns-27.org
NSns-1978.awsdns-55.co.uk
A2600:9000:5307:ba00::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-1978.awsdns-55.co.uk
A205.251.199.186🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-1978.awsdns-55.co.uk
NSns-858.awsdns-43.net
A2600:9000:5303:5a00::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront
PTRns-858.awsdns-43.net
A205.251.195.90🇺🇸 Amazon205.251.195.0/24 prefix
PTRns-858.awsdns-43.net
MXfirstkor-co-kr.mail.protection.outlook.com ⭐
A2a01:111:f403:cc35::🇰🇷 Microsoft2a01:111:f000::/36
PTRmail-slxp216cu00200.inbound.protection.outlook.com
A2a01:111:f403:cc35::1🇰🇷 Microsoft2a01:111:f000::/36
PTRmail-sevp216cu00101.inbound.protection.outlook.com
A2a01:111:f403:cc35::2🇰🇷 Microsoft2a01:111:f000::/36
PTRmail-se2p216cu00602.inbound.protection.outlook.com
A2a01:111:f403:cc37::🇰🇷 Microsoft2a01:111:f000::/36
PTRmail-puwp216cu00200.inbound.protection.outlook.com
A52.101.153.0🇰🇷 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-slxp216cu00200.inbound.protection.outlook.com
A52.101.153.1🇰🇷 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sevp216cu00101.inbound.protection.outlook.com
A52.101.153.2🇰🇷 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-se2p216cu00602.inbound.protection.outlook.com
A52.101.155.0🇰🇷 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-puwp216cu00200.inbound.protection.outlook.com
TXTv=spf1 include:spf.protection.outlook.com -all
SOAns-432.awsdns-54.comawsdns-hostmaster@amazon.com serial=1

co.kr

DNSSEC⚠️ Not signed
NSg.dns.kr ⭐ ⚠️ Not in parent delegation
NSb.dns.kr ⚠️ Not in parent delegation
NSc.dns.kr ⚠️ Not in parent delegation
NSd.dns.kr ⚠️ Not in parent delegation
NSe.dns.kr ⚠️ Not in parent delegation
NSf.dns.kr ⚠️ Not in parent delegation
SOAg.dns.krdomain-manager@nic.or.kr serial=2604120542
WOT: UNKNOWN (62/100)

Subdomains

www.firstkor.co.kr

Same first word

firstkor.co.kr

Similar names

fortrisk.com
fortrisk.nl

DNS History

53 records (9 active, 44 former)

NSns-1241.awsdns-27.orgns-1978.awsdns-55.co.ukns-432.awsdns-54.comns-858.awsdns-43.netMXfirstkor-co-kr.mail.protection.outlook.comA3.163.10.1113.163.10.383.163.10.53.163.10.70108.139.113.122108.139.113.128108.139.113.18108.139.113.2913.249.182.10613.249.182.11313.249.182.11613.249.182.7213.33.153.12813.33.153.1613.33.153.1713.33.153.7413.35.78.1713.35.78.2813.35.78.3713.35.78.6918.165.140.1218.165.140.12918.165.140.1718.165.140.8618.238.49.11018.238.49.12918.238.49.4118.238.49.7318.64.207.1018.64.207.5518.64.207.7718.64.207.853.161.150.1173.161.150.363.161.150.633.161.150.873.168.73.453.168.73.493.168.73.83.168.73.863.174.59.233.174.59.333.174.59.613.174.59.7952.222.177.3652.222.177.6652.222.177.7852.222.177.89
●NSns-1241.awsdns-27.org2026-03-06 → 2026-04-12 · 2 obs
● 2026-03-06 07:56:52
● 2026-04-12 02:50:30
●NSns-1978.awsdns-55.co.uk2026-03-06 → 2026-04-12 · 2 obs
● 2026-03-06 07:56:52
● 2026-04-12 02:50:30
●NSns-432.awsdns-54.com2026-03-06 → 2026-04-12 · 2 obs
● 2026-03-06 07:56:52
● 2026-04-12 02:50:30
●NSns-858.awsdns-43.net2026-03-06 → 2026-04-12 · 2 obs
● 2026-03-06 07:56:52
● 2026-04-12 02:50:30
●MXfirstkor-co-kr.mail.protection.outlook.com2026-03-06 → 2026-04-12 · 2 obs
● 2026-03-06 07:56:52
● 2026-04-12 02:50:30
○A108.139.113.1222026-04-08 → 2026-04-11 · 14 obs
○ 2026-04-08 05:58:50
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○A108.139.113.1282026-04-08 → 2026-04-11 · 14 obs
○ 2026-04-08 05:58:50
● 2026-04-08 08:34:56
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○ 2026-04-12 02:50:30
○A108.139.113.182026-04-08 → 2026-04-11 · 14 obs
○ 2026-04-08 05:58:50
● 2026-04-08 08:34:56
● 2026-04-08 10:45:28
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○A108.139.113.292026-04-08 → 2026-04-11 · 14 obs
○ 2026-04-08 05:58:50
● 2026-04-08 08:34:56
● 2026-04-08 10:45:28
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○ 2026-04-12 02:50:30
○A13.249.182.1062026-03-06 → 2026-03-20 · 14 obs
● 2026-03-06 07:56:52
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● 2026-03-14 00:38:22
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○ 2026-04-12 02:50:30
○A13.249.182.1132026-03-06 → 2026-03-20 · 14 obs
● 2026-03-06 07:56:52
○ 2026-03-06 11:19:08
● 2026-03-14 00:38:22
○ 2026-03-14 12:51:10
● 2026-03-14 18:35:06
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○ 2026-04-12 02:50:30
○A13.249.182.1162026-03-06 → 2026-03-20 · 14 obs
● 2026-03-06 07:56:52
○ 2026-03-06 11:19:08
● 2026-03-14 00:38:22
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○ 2026-03-20 11:33:44
○ 2026-04-12 02:50:30
○A13.249.182.722026-03-06 → 2026-03-20 · 14 obs
● 2026-03-06 07:56:52
○ 2026-03-06 11:19:08
● 2026-03-14 00:38:22
○ 2026-03-14 12:51:10
● 2026-03-14 18:35:06
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○ 2026-03-20 11:33:44
○ 2026-04-12 02:50:30
○A13.33.153.1282026-03-06 → 2026-04-11 · 73 obs
○ 2026-03-06 07:56:52
● 2026-03-06 11:19:08
○ 2026-03-14 00:38:22
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● 2026-03-15 22:19:06
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○ 2026-04-11 20:26:54
○ 2026-04-12 02:50:30
○A13.33.153.162026-03-06 → 2026-04-11 · 73 obs
○ 2026-03-06 07:56:52
● 2026-03-06 11:19:08
○ 2026-03-14 00:38:22
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○ 2026-04-12 02:50:30
○A13.33.153.172026-03-06 → 2026-04-11 · 73 obs
○ 2026-03-06 07:56:52
● 2026-03-06 11:19:08
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○ 2026-04-12 02:50:30
○A13.33.153.742026-03-06 → 2026-04-11 · 73 obs
○ 2026-03-06 07:56:52
● 2026-03-06 11:19:08
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● 2026-04-11 19:27:18
○ 2026-04-11 20:26:54
○ 2026-04-12 02:50:30
○A13.35.78.172026-03-25 → 2026-03-27 · 8 obs
○ 2026-03-24 22:28:34
● 2026-03-25 00:13:34
○ 2026-03-25 01:47:58
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● 2026-03-27 03:19:32
● 2026-03-27 05:15:04
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○A13.35.78.282026-03-25 → 2026-03-27 · 8 obs
○ 2026-03-24 22:28:34
● 2026-03-25 00:13:34
○ 2026-03-25 01:47:58
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● 2026-03-27 03:19:32
● 2026-03-27 05:15:04
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○A13.35.78.372026-03-25 → 2026-03-27 · 8 obs
○ 2026-03-24 22:28:34
● 2026-03-25 00:13:34
○ 2026-03-25 01:47:58
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● 2026-03-27 03:19:32
● 2026-03-27 05:15:04
○ 2026-03-27 10:11:36
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○A13.35.78.692026-03-25 → 2026-03-27 · 8 obs
○ 2026-03-24 22:28:34
● 2026-03-25 00:13:34
○ 2026-03-25 01:47:58
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● 2026-03-27 03:19:32
● 2026-03-27 05:15:04
○ 2026-03-27 10:11:36
○ 2026-04-12 02:50:30
○A18.165.140.122026-03-24 → 2026-03-27 · 18 obs
○ 2026-03-20 11:33:44
● 2026-03-24 13:11:02
○ 2026-03-24 20:42:22
● 2026-03-24 22:28:34
○ 2026-03-25 00:13:34
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● 2026-03-27 01:27:58
● 2026-03-27 02:03:04
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● 2026-03-27 15:04:18
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○ 2026-04-12 02:50:30
○A18.165.140.1292026-03-24 → 2026-03-27 · 18 obs
○ 2026-03-20 11:33:44
● 2026-03-24 13:11:02
○ 2026-03-24 20:42:22
● 2026-03-24 22:28:34
○ 2026-03-25 00:13:34
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○A18.165.140.172026-03-24 → 2026-03-27 · 18 obs
○ 2026-03-20 11:33:44
● 2026-03-24 13:11:02
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● 2026-03-24 22:28:34
○ 2026-03-25 00:13:34
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○A18.165.140.862026-03-24 → 2026-03-27 · 18 obs
○ 2026-03-20 11:33:44
● 2026-03-24 13:11:02
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● 2026-03-24 22:28:34
○ 2026-03-25 00:13:34
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○A18.238.49.1102026-03-14 → 2026-03-30 · 7 obs
○ 2026-03-14 00:38:22
● 2026-03-14 12:51:10
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● 2026-03-30 02:02:40
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○A18.238.49.1292026-03-14 → 2026-03-30 · 7 obs
○ 2026-03-14 00:38:22
● 2026-03-14 12:51:10
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● 2026-03-30 02:02:40
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○A18.238.49.412026-03-14 → 2026-03-30 · 7 obs
○ 2026-03-14 00:38:22
● 2026-03-14 12:51:10
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● 2026-03-30 02:02:40
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○A18.238.49.732026-03-14 → 2026-03-30 · 7 obs
○ 2026-03-14 00:38:22
● 2026-03-14 12:51:10
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● 2026-03-30 02:02:40
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○A18.64.207.102026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 09:20:08
● 2026-03-30 11:17:42
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○A18.64.207.552026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 09:20:08
● 2026-03-30 11:17:42
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○A18.64.207.772026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 09:20:08
● 2026-03-30 11:17:42
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○A18.64.207.852026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 09:20:08
● 2026-03-30 11:17:42
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○ 2026-04-12 02:50:30
○A3.161.150.1172026-03-31 → 2026-04-04 · 15 obs
○ 2026-03-30 16:19:40
● 2026-03-31 00:54:00
● 2026-03-31 03:22:18
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○A3.161.150.362026-03-31 → 2026-04-04 · 15 obs
○ 2026-03-30 16:19:40
● 2026-03-31 00:54:00
● 2026-03-31 03:22:18
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○A3.161.150.632026-03-31 → 2026-04-04 · 15 obs
○ 2026-03-30 16:19:40
● 2026-03-31 00:54:00
● 2026-03-31 03:22:18
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● 2026-04-01 08:22:30
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● 2026-04-04 17:14:12
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○A3.161.150.872026-03-31 → 2026-04-04 · 15 obs
○ 2026-03-30 16:19:40
● 2026-03-31 00:54:00
● 2026-03-31 03:22:18
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● 2026-04-01 08:22:30
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● 2026-04-04 17:14:12
○ 2026-04-05 02:45:52
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●A3.163.10.1112026-03-28 → 2026-04-12 · 24 obs
○ 2026-03-28 02:52:32
● 2026-03-28 13:36:14
● 2026-03-28 16:25:20
○ 2026-03-28 19:57:06
● 2026-03-29 09:07:18
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● 2026-03-29 19:26:40
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● 2026-04-08 19:32:16
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● 2026-04-10 06:33:04
○ 2026-04-10 18:13:44
○ 2026-04-11 22:42:04
● 2026-04-12 02:50:30
●A3.163.10.382026-03-28 → 2026-04-12 · 24 obs
○ 2026-03-28 02:52:32
● 2026-03-28 13:36:14
● 2026-03-28 16:25:20
○ 2026-03-28 19:57:06
● 2026-03-29 09:07:18
● 2026-03-29 13:07:00
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● 2026-03-29 19:26:40
● 2026-03-30 00:50:30
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● 2026-04-10 06:33:04
○ 2026-04-10 18:13:44
○ 2026-04-11 22:42:04
● 2026-04-12 02:50:30
●A3.163.10.52026-03-28 → 2026-04-12 · 24 obs
○ 2026-03-28 02:52:32
● 2026-03-28 13:36:14
● 2026-03-28 16:25:20
○ 2026-03-28 19:57:06
● 2026-03-29 09:07:18
● 2026-03-29 13:07:00
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● 2026-04-08 19:32:16
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● 2026-04-10 06:33:04
○ 2026-04-10 18:13:44
○ 2026-04-11 22:42:04
● 2026-04-12 02:50:30
●A3.163.10.702026-03-28 → 2026-04-12 · 24 obs
○ 2026-03-28 02:52:32
● 2026-03-28 13:36:14
● 2026-03-28 16:25:20
○ 2026-03-28 19:57:06
● 2026-03-29 09:07:18
● 2026-03-29 13:07:00
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● 2026-03-29 19:26:40
● 2026-03-30 00:50:30
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● 2026-03-30 16:19:40
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● 2026-03-31 11:05:24
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● 2026-04-08 19:32:16
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● 2026-04-10 06:33:04
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● 2026-04-12 02:50:30
○A3.168.73.452026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 02:02:40
● 2026-03-30 06:15:22
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○A3.168.73.492026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 02:02:40
● 2026-03-30 06:15:22
○ 2026-03-30 09:20:08
○ 2026-04-12 02:50:30
○A3.168.73.82026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 02:02:40
● 2026-03-30 06:15:22
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○A3.168.73.862026-03-30 → 2026-03-30 · 4 obs
○ 2026-03-30 02:02:40
● 2026-03-30 06:15:22
○ 2026-03-30 09:20:08
○ 2026-04-12 02:50:30
○A3.174.59.232026-03-30 → 2026-04-11 · 14 obs
○ 2026-03-30 11:17:42
● 2026-03-30 13:20:30
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● 2026-03-30 15:29:56
○ 2026-03-30 16:19:40
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● 2026-04-01 19:14:14
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● 2026-04-11 22:42:04
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○A3.174.59.332026-03-30 → 2026-04-11 · 14 obs
○ 2026-03-30 11:17:42
● 2026-03-30 13:20:30
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● 2026-03-30 15:29:56
○ 2026-03-30 16:19:40
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● 2026-04-11 22:42:04
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○A3.174.59.612026-03-30 → 2026-04-11 · 14 obs
○ 2026-03-30 11:17:42
● 2026-03-30 13:20:30
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● 2026-03-30 15:29:56
○ 2026-03-30 16:19:40
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● 2026-04-11 00:12:56
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● 2026-04-11 22:42:04
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○A3.174.59.792026-03-30 → 2026-04-11 · 14 obs
○ 2026-03-30 11:17:42
● 2026-03-30 13:20:30
○ 2026-03-30 14:47:48
● 2026-03-30 15:29:56
○ 2026-03-30 16:19:40
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● 2026-04-01 19:14:14
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● 2026-04-11 00:12:56
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● 2026-04-11 22:42:04
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○A52.222.177.362026-04-05 → 2026-04-07 · 9 obs
○ 2026-04-04 17:14:12
● 2026-04-05 02:45:52
● 2026-04-05 07:07:38
○ 2026-04-05 08:40:24
● 2026-04-06 04:44:54
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● 2026-04-07 02:09:12
○ 2026-04-08 01:13:44
○ 2026-04-12 02:50:30
○A52.222.177.662026-04-05 → 2026-04-07 · 9 obs
○ 2026-04-04 17:14:12
● 2026-04-05 02:45:52
● 2026-04-05 07:07:38
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● 2026-04-06 04:44:54
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● 2026-04-07 02:09:12
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○A52.222.177.782026-04-05 → 2026-04-07 · 9 obs
○ 2026-04-04 17:14:12
● 2026-04-05 02:45:52
● 2026-04-05 07:07:38
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● 2026-04-06 04:44:54
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● 2026-04-07 02:09:12
○ 2026-04-08 01:13:44
○ 2026-04-12 02:50:30
○A52.222.177.892026-04-05 → 2026-04-07 · 9 obs
○ 2026-04-04 17:14:12
● 2026-04-05 02:45:52
● 2026-04-05 07:07:38
○ 2026-04-05 08:40:24
● 2026-04-06 04:44:54
○ 2026-04-06 22:11:32
● 2026-04-07 02:09:12
○ 2026-04-08 01:13:44
○ 2026-04-12 02:50:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
krc.dns.kr, e.dns.kr, d.dns.kr, g.dns.kr...-
firstkor.co.krns-432.awsdns-54.com, ns-858.awsdns-43.net, ns-1241.awsdns-27.org, ns-1978.awsdns-55.co.uk-

✅ Authoritative Response

Server:205.251.196.217

NS records: ns-432.awsdns-54.com, ns-858.awsdns-43.net, ns-1241.awsdns-27.org, ns-1978.awsdns-55.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstkor.co.kr (unsigned zone)

⏱️ Timing

Total: 948ms | Queries: -

📄 Records

TypeCountSample Data
A43.163.10.70, 3.163.10.5...
NS4ns-1241.awsdns-27.org, ns-1978.awsdns-55.co.uk...
MX1firstkor-co-kr.mail.protection.outlook.c
TXT1v=spf1 include:spf.protection.outlook.co
SOA1ns-432.awsdns-54.com awsdns-hostmaster.a

Analysis

Hierarchy

firstkor.co.kr is a parent of www.firstkor.co.kr.

IP Addresses

firstkor.co.kr resolves to four IPs: 3.163.10.5, 3.163.10.38, 3.163.10.70 and 3.163.10.111.

Other host names such as d117duzq0n8k1a.cloudfront.net, www.nomnovel.com, www.la.landmark.solutions, dyhybhmfthri4.cloudfront.net and cf.api-gateway.test.mp-dst.onyx60.com share IP numbers with firstkor.co.kr.

Name Servers

firstkor.co.kr is delegated to four name servers: ns-432.awsdns-54.com, ns-858.awsdns-43.net, ns-1241.awsdns-27.org and ns-1978.awsdns-55.co.uk.

At least part of the name servers for firstkor.co.kr are shared with other domains, for instance medsy.eu, hostus.net.au, healthcarecomplaints.gov.au, hornetclaim.com and online-shibazushi.com.

These name servers are commonly used alongside ns-691.awsdns-22.net and ns-1811.awsdns-34.co.uk.

Host names with two IP numbers:

ns-432.awsdns-54.com points to: 2600:9000:5301:b000::1 and 205.251.193.176

ns-858.awsdns-43.net points to: 2600:9000:5303:5a00::1 and 205.251.195.90

ns-1241.awsdns-27.org points to: 2600:9000:5304:d900::1 and 205.251.196.217

ns-1978.awsdns-55.co.uk points to: 2600:9000:5307:ba00::1 and 205.251.199.186

Mail Servers

The mail server for firstkor.co.kr is firstkor-co-kr.mail.protection.outlook.com.

firstkor-co-kr.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:cc35::, 2a01:111:f403:cc35::1, 2a01:111:f403:cc35::2, 2a01:111:f403:cc37::, 52.101.153.0, 52.101.153.1, 52.101.153.2 and 52.101.155.0.