core-tech.tw - dns.ninja

core-tech.tw

DNSSEC⚠️ Not signed
A13.113.145.97🇯🇵 Amazon13.112.0.0/14 EC2 NRT prefix
PTRec2-13-113-145-97.ap-northeast-1.compute.amazonaws.com
A35.74.207.121🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix
A54.238.86.84🇯🇵 Amazon54.238.0.0/17 EC2 NRT Prefix
NSns-538.awsdns-03.net ⭐
A2600:9000:5302:1a00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-538.awsdns-03.net
A205.251.194.26🇺🇸 Amazon205.251.194.0/24 prefix
NSns-1521.awsdns-62.org
A2600:9000:5305:f100::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1521.awsdns-62.org
A205.251.197.241🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1521.awsdns-62.org
NSns-1591.awsdns-06.co.uk
A2600:9000:5306:3700::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront
PTRns-1591.awsdns-06.co.uk
A205.251.198.55🇺🇸 Amazon205.251.198.0/24 prefix
PTRns-1591.awsdns-06.co.uk
NSns-87.awsdns-10.com
A2600:9000:5300:5700::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-87.awsdns-10.com
A205.251.192.87🇺🇸 Amazon205.251.192.0/24 prefix
MXmail.core-tech.tw ⭐
A52.193.14.144🇯🇵 Amazon52.192.0.0/15 EC2 NRT prefix
PTRmail.core-tech.tw
TXTgoogle-site-verification=44t1ayu_sHzOqvyUPCkOZPqLzPpLIcTicU3SmgYVW3s
TXTv=spf1 a:mail.core-tech.tw mx:mail.core-tech.tw ~all
SOAns-538.awsdns-03.netawsdns-hostmaster@amazon.com serial=1

tw

DNSSEC🔒 Signed (DS record present)
NSa.dns.tw ⭐
NSanytld.apnic.net ⚠️ Not in parent delegation
NSb.dns.tw
NSc.dns.tw
NSd.dns.tw
NSe.dns.tw
NSf.dns.tw
NSg.dns.tw
NSh.dns.tw
SOAa.dns.twsnw@twnic.net.tw serial=2011036388

Subdomains

mail.core-tech.tw

Same first word

core-tech.eu
core-tech.ca
core-tech.com.cn
core-tech.tw
core-tech.jp
core-tech.ru
core-tech.co.jp
core-tech.sbs
core-tech.co.uk

Similar names

tech-core.net
creo-tech.com
tech-core.ru
reco-tech.at

DNS History

28 records (8 active, 20 former)

20192020202120222023202420252026NSns-1521.awsdns-62.orgns-1591.awsdns-06.co.ukns-538.awsdns-03.netns-87.awsdns-10.comns-1168.awsdns-18.orgns-1657.awsdns-15.co.ukns-509.awsdns-63.comns-535.awsdns-02.netMXmail.core-tech.twA13.113.145.9735.74.207.12154.238.86.8413.113.176.18413.113.80.23013.159.169.1313.193.77.18413.230.102.11113.230.175.1223.114.148.15435.73.48.23235.76.24.6135.79.44.6443.207.255.1352.192.25.25452.199.55.16754.249.242.3554.250.254.16454.92.98.146
○NSns-1168.awsdns-18.org2018-05-23 → 2018-05-23 · 3 obs
● 2018-05-23 12:13:28
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
●NSns-1521.awsdns-62.org2026-03-07 → 2026-07-20 · 3 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
● 2026-07-20 13:05:44
●NSns-1591.awsdns-06.co.uk2026-03-07 → 2026-07-20 · 3 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
● 2026-07-20 13:05:44
○NSns-1657.awsdns-15.co.uk2018-05-23 → 2018-05-23 · 3 obs
● 2018-05-23 12:13:28
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
○NSns-509.awsdns-63.com2018-05-23 → 2018-05-23 · 3 obs
● 2018-05-23 12:13:28
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
○NSns-535.awsdns-02.net2018-05-23 → 2018-05-23 · 3 obs
● 2018-05-23 12:13:28
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
●NSns-538.awsdns-03.net2026-03-07 → 2026-07-20 · 3 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
● 2026-07-20 13:05:44
●NSns-87.awsdns-10.com2026-03-07 → 2026-07-20 · 3 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
● 2026-07-20 13:05:44
●MXmail.core-tech.tw2018-05-23 → 2026-07-20 · 2 obs
● 2018-05-23 12:13:28
● 2026-07-20 13:05:44
●A13.113.145.972026-07-20 → 2026-07-20 · 2 obs
○ 2026-05-19 14:28:00
● 2026-07-20 13:05:44
○A13.113.176.1842018-05-23 → 2018-05-23 · 3 obs
● 2018-05-23 12:13:28
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
○A13.113.80.2302026-05-19 → 2026-05-19 · 3 obs
○ 2026-05-03 07:06:50
● 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A13.159.169.132026-05-03 → 2026-05-03 · 4 obs
○ 2026-04-30 19:05:42
● 2026-05-03 07:06:50
○ 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A13.193.77.1842026-04-19 → 2026-04-30 · 5 obs
○ 2026-03-07 20:01:16
● 2026-04-19 06:59:12
● 2026-04-30 19:05:42
○ 2026-05-03 07:06:50
○ 2026-07-20 13:05:44
○A13.230.102.1112026-03-07 → 2026-03-07 · 4 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
○ 2026-04-19 06:59:12
○ 2026-07-20 13:05:44
○A13.230.175.1222026-05-19 → 2026-05-19 · 3 obs
○ 2026-05-03 07:06:50
● 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A3.114.148.1542026-05-03 → 2026-05-03 · 4 obs
○ 2026-04-30 19:05:42
● 2026-05-03 07:06:50
○ 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A35.73.48.2322026-04-19 → 2026-04-30 · 5 obs
○ 2026-03-07 20:01:16
● 2026-04-19 06:59:12
● 2026-04-30 19:05:42
○ 2026-05-03 07:06:50
○ 2026-07-20 13:05:44
●A35.74.207.1212026-07-20 → 2026-07-20 · 2 obs
○ 2026-05-19 14:28:00
● 2026-07-20 13:05:44
○A35.76.24.612026-04-19 → 2026-04-19 · 4 obs
○ 2026-03-07 20:01:16
● 2026-04-19 06:59:12
○ 2026-04-28 11:28:26
○ 2026-07-20 13:05:44
○A35.79.44.642026-03-07 → 2026-03-07 · 4 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
○ 2026-04-19 06:59:12
○ 2026-07-20 13:05:44
○A43.207.255.132026-03-07 → 2026-03-07 · 4 obs
○ 2018-05-23 12:13:28
● 2026-03-07 20:01:16
○ 2026-04-19 06:59:12
○ 2026-07-20 13:05:44
○A52.192.25.2542026-04-28 → 2026-05-03 · 5 obs
○ 2026-04-19 06:59:12
● 2026-04-28 11:28:26
● 2026-05-03 07:06:50
○ 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A52.199.55.1672026-03-07 → 2026-07-20 · 2 obs
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
●A54.238.86.842026-07-20 → 2026-07-20 · 2 obs
○ 2026-05-19 14:28:00
● 2026-07-20 13:05:44
○A54.249.242.352026-05-19 → 2026-05-19 · 3 obs
○ 2026-05-03 07:06:50
● 2026-05-19 14:28:00
○ 2026-07-20 13:05:44
○A54.250.254.1642026-03-07 → 2026-07-20 · 2 obs
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44
○A54.92.98.1462026-03-07 → 2026-07-20 · 2 obs
○ 2026-03-07 20:01:16
○ 2026-07-20 13:05:44

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
twf.dns.tw, e.dns.tw, b.dns.tw, a.dns.tw...-
core-tech.twns-1591.awsdns-06.co.uk, ns-1521.awsdns-62.org, ns-87.awsdns-10.com, ns-538.awsdns-03.net-

✅ Authoritative Response

Server:205.251.198.55

NS records: ns-1591.awsdns-06.co.uk, ns-1521.awsdns-62.org, ns-87.awsdns-10.com, ns-538.awsdns-03.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for core-tech.tw (unsigned zone)

⏱️ Timing

Total: 2058ms | Queries: -

📄 Records

TypeCountSample Data
A354.238.86.84, 35.74.207.121...
NS4ns-1521.awsdns-62.org, ns-1591.awsdns-06.co.uk...
MX1mail.core-tech.tw (pri: 10)
TXT2google-site-verification=44t1ayu_sHzOqvy, v=spf1 a:mail.core-tech.tw mx:mail.core-
SOA1ns-538.awsdns-03.net awsdns-hostmaster.a

Analysis

Hierarchy

core-tech.tw is a parent domain of mail.core-tech.tw.

IP Addresses

core-tech.tw resolves to three IP addresses: 13.113.145.97, 35.74.207.121 and 54.238.86.84.

Name Servers

The domain core-tech.tw is delegated to these four name servers: ns-87.awsdns-10.com, ns-538.awsdns-03.net, ns-1521.awsdns-62.org and ns-1591.awsdns-06.co.uk.

core-tech.tw shares at least some of its name servers with other domains, including fthaiog10a76.com, century21oregon.com, geraweb.net and two others.

These name servers are frequently paired with the name servers ns-999.awsdns-60.net, ns-1070.awsdns-05.org and ns-1601.awsdns-08.co.uk.

The host names ns-87.awsdns-10.com, ns-538.awsdns-03.net, ns-1521.awsdns-62.org and ns-1591.awsdns-06.co.uk each resolve to two IP addresses: ns-87.awsdns-10.com resolves to 205.251.192.87 and 2600:9000:5300:5700::1; ns-538.awsdns-03.net resolves to 205.251.194.26 and 2600:9000:5302:1a00::1; ns-1521.awsdns-62.org resolves to 205.251.197.241 and 2600:9000:5305:f100::1; ns-1591.awsdns-06.co.uk resolves to 205.251.198.55 and 2600:9000:5306:3700::1.

Mail Servers

core-tech.tw routes its mail through a single mail server, mail.core-tech.tw.

mail.core-tech.tw points to one IP number — 52.193.14.144.