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sim.edu.sg

DNSSEC🔒 Signed (DS record present)
A3.162.125.20🇺🇸 Amazon
PTRserver-3-162-125-20.iad61.r.cloudfront.net
A3.162.125.31🇺🇸 Amazon
A3.162.125.56🇺🇸 Amazon
A3.162.125.95🇺🇸 Amazon
NSns-1605.awsdns-08.co.uk ⭐
A2600:9000:5306:4500::1🇺🇸 Amazon
PTRns-1605.awsdns-08.co.uk
A205.251.198.69🇺🇸 Amazon
PTRns-1605.awsdns-08.co.uk
NSns-138.awsdns-17.com
A2600:9000:5300:8a00::1🇺🇸 Amazon
PTRns-138.awsdns-17.com
A205.251.192.138🇺🇸 Amazon
PTRns-138.awsdns-17.com
NSns-1448.awsdns-53.org
A2600:9000:5305:a800::1🇺🇸 Amazon
PTRns-1448.awsdns-53.org
A205.251.197.168🇺🇸 Amazon
PTRns-1448.awsdns-53.org
NSns-574.awsdns-07.net
A2600:9000:5302:3e00::1🇺🇸 Amazon
PTRns-574.awsdns-07.net
A205.251.194.62🇺🇸 Amazon
PTRns-574.awsdns-07.net
MXsim-edu-sg.mail.protection.outlook.com ⭐
A213.199.154.23🇬🇧 Microsoft
PTRmail-am14023.inbound.protection.outlook.com
A213.199.154.87🇮🇪 Microsoft
PTRmail-db34087.inbound.protection.outlook.com
TXTBFXzZBgYMPVFoT5fejzQa/WwmUdMduFtDvEa5fR7QpwQO+qfimta7RwwOnnRY95oq67fSy5Yj/XYk...
TXTMS=ms47186272
TXTMS=ms58708068
TXTZOOM_verify_DyYw5mfogTMGn8QFqnGx7N
TXT_globalsign-domain-verification=xoAER-c6vLZ51PbHRMyt3_UkqgfowQtBivW3N8Sfaq
TXT_mjd3l3e8hk7t1c2lp5c5rcwku0yamwk
TXTatlassian-domain-verification=Da2GdSDriNagIbbWToYP58d8wONr5TgWynsGo2QkmC6bl19...
TXTcjwzrd59c33ph2369swnv3nh6pz7myv1
TXTee2bca9e-ffe6-470f-9aac-4a3533f273c6
TXTgoogle-site-verification=NDcsFKUpzJtbrvhH-KBAw4f5UJXsf8NTW2Ia3xTwVIM
TXTgoogle-site-verification=NJMkZHbEldXyAnJlgtr0NW7VukXanYIr79eliLTsoQo
TXThgvckz77dbfz87n2ng3nkht8fsp531db
TXTopenatts a=dns-did; p=did:ethr:0x3f6daf8b0ed8c735f97390c7eabf191182e1e254#con...
TXTopenatts net=ethereum netId=1 addr=0x240ad6779ce10725205efd7165e7fa5612c6907f
TXTopenatts net=ethereum netId=3 addr=0xe17cb2737d003c526a40afc6233fa878413ffa07
TXTsafebreach-domain-verification=7b80a913-7ee7-4503-96b1-27b8a53fec20
TXTv=spf1 ip4:10.71.133.73 ip4:10.73.11.14 ip4:10.72.0.104 ip4:10.71.3.232 ip4:1...
SOAns-1605.awsdns-08.co.ukawsdns-hostmaster@amazon.com serial=1

edu.sg

DNSSEC🔒 Signed (DS record present)
NSds.sgnic.sg ⭐
NSdsany2.sgnic.sg⚠️
NSdsany3.sgnic.sg⚠️
NSdsany4.sgnic.sg⚠️
NSpch.sgzones.sg⚠️ 🔒
SOAds.sgnic.sgdna@sgnic.sg serial=2602170200
rank #205147 globally
rank #197 in the tld
📈 Tranco rank: #238,901

Up

libproxy.sim.edu.sg
smtp1.sim.edu.sg
smtp2.sim.edu.sg
pd.sim.edu.sg
loadbalancer.sim.edu.sg
pluto.sim.edu.sg
simfw2.sim.edu.sg
simfw1.sim.edu.sg

Same first word

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sim.lt
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sim.si
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mis.careers

DNS History

31 records (10 active, 21 former)

201020122014201620182020202220242026NSns-138.awsdns-17.comns-1448.awsdns-53.orgns-1605.awsdns-08.co.ukns-574.awsdns-07.netns2.1-net-singapore.comsim-hq.simnet.edu.sgsimfw1.sim.edu.sgsimfw2.sim.edu.sgsimhqad1simhqad2simmhfps.simnet.edu.sgvirgo.sim.edu.sgMXsim-edu-sg.mail.protection.outlook.comsimmailx1.sim.edu.sgsimmailx2.sim.edu.sgsimsmtpi1.sim.edu.sgsimsmtpi2.sim.edu.sgsimsmtpi3.sim.edu.sgsmtp.sim.edu.sgsmtp1.sim.edu.sgA3.162.125.203.162.125.313.162.125.563.162.125.95108.156.39.39108.156.39.56108.156.39.57108.156.39.60202.172.246.221203.217.186.221PTR192.187.217.203.in-addr.arpa.sim.edu.sg
●NSns-138.awsdns-17.com2026-02-14 → 2026-02-17 · 3 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
● 2026-02-17 03:14:18
●NSns-1448.awsdns-53.org2026-02-14 → 2026-02-17 · 3 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
● 2026-02-17 03:14:18
●NSns-1605.awsdns-08.co.uk2026-02-14 → 2026-02-17 · 3 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
● 2026-02-17 03:14:18
●NSns-574.awsdns-07.net2026-02-14 → 2026-02-17 · 3 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
● 2026-02-17 03:14:18
○NSns2.1-net-singapore.com2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○NSsim-hq.simnet.edu.sg2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○NSsimfw1.sim.edu.sg2009-01-07 → 2018-10-20 · 7 obs
● 2009-01-07 14:35:44
● 2016-08-23 12:33:48
○ 2016-12-10 07:43:06
○ 2018-05-29 08:59:12
● 2018-10-20 17:59:56
○ 2026-02-14 23:56:20
○ 2026-02-17 03:14:18
○NSsimfw2.sim.edu.sg2015-06-20 → 2018-10-20 · 5 obs
○ 2009-01-07 14:35:44
● 2015-06-20 19:20:56
● 2018-10-20 17:59:56
○ 2026-02-14 23:56:20
○ 2026-02-17 03:14:18
○NSsimhqad12009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○NSsimhqad22009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○NSsimmhfps.simnet.edu.sg2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○NSvirgo.sim.edu.sg2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
●MXsim-edu-sg.mail.protection.outlook.com2016-12-10 → 2026-02-17 · 3 obs
○ 2016-08-23 12:33:48
● 2016-12-10 07:43:06
● 2026-02-17 03:14:18
○MXsimmailx1.sim.edu.sg2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○MXsimmailx2.sim.edu.sg2009-01-07 → 2009-01-07 · 3 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
○ 2026-02-17 03:14:18
○MXsimsmtpi1.sim.edu.sg2009-01-07 → 2016-08-23 · 4 obs
● 2009-01-07 14:35:44
● 2016-08-23 12:33:48
○ 2016-12-10 07:43:06
○ 2026-02-17 03:14:18
○MXsimsmtpi2.sim.edu.sg2009-01-07 → 2016-08-23 · 6 obs
● 2009-01-07 14:35:44
○ 2015-06-20 19:20:56
● 2015-09-04 18:15:52
● 2016-08-23 12:33:48
○ 2016-12-10 07:43:06
○ 2026-02-17 03:14:18
○MXsimsmtpi3.sim.edu.sg2015-06-20 → 2016-08-23 · 5 obs
○ 2009-01-07 14:35:44
● 2015-06-20 19:20:56
● 2016-08-23 12:33:48
○ 2016-12-10 07:43:06
○ 2026-02-17 03:14:18
○MXsmtp.sim.edu.sg2009-01-07 → 2017-05-09 · 4 obs
● 2009-01-07 14:35:44
● 2017-05-09 05:41:48
○ 2017-07-08 06:38:02
○ 2026-02-17 03:14:18
○MXsmtp1.sim.edu.sg2015-06-20 → 2016-08-23 · 5 obs
○ 2009-01-07 14:35:44
● 2015-06-20 19:20:56
● 2016-08-23 12:33:48
○ 2016-12-10 07:43:06
○ 2026-02-17 03:14:18
○A108.156.39.392026-02-16 → 2026-02-17 · 8 obs
○ 2026-02-14 23:56:20
● 2026-02-16 02:13:54
● 2026-02-16 12:39:12
○ 2026-02-16 21:54:28
● 2026-02-17 00:19:18
● 2026-02-17 01:21:36
○ 2026-02-17 03:14:12
○ 2026-02-17 03:14:18
○A108.156.39.562026-02-16 → 2026-02-17 · 8 obs
○ 2026-02-14 23:56:20
● 2026-02-16 02:13:54
● 2026-02-16 12:39:12
○ 2026-02-16 21:54:28
● 2026-02-17 00:19:18
● 2026-02-17 01:21:36
○ 2026-02-17 03:14:12
○ 2026-02-17 03:14:18
○A108.156.39.572026-02-16 → 2026-02-17 · 8 obs
○ 2026-02-14 23:56:20
● 2026-02-16 02:13:54
● 2026-02-16 12:39:12
○ 2026-02-16 21:54:28
● 2026-02-17 00:19:18
● 2026-02-17 01:21:36
○ 2026-02-17 03:14:12
○ 2026-02-17 03:14:18
○A108.156.39.602026-02-16 → 2026-02-17 · 8 obs
○ 2026-02-14 23:56:20
● 2026-02-16 02:13:54
● 2026-02-16 12:39:12
○ 2026-02-16 21:54:28
● 2026-02-17 00:19:18
● 2026-02-17 01:21:36
○ 2026-02-17 03:14:12
○ 2026-02-17 03:14:18
○A202.172.246.2212015-06-20 → 2015-06-20 · 4 obs
○ 2009-01-07 14:35:44
● 2015-06-20 19:20:56
○ 2015-09-04 18:15:52
○ 2026-02-17 03:14:18
○A203.217.186.2212015-09-04 → 2018-10-20 · 5 obs
○ 2009-01-07 14:35:44
● 2015-09-04 18:15:52
● 2018-10-20 17:59:56
○ 2026-02-14 23:56:20
○ 2026-02-17 03:14:18
●A3.162.125.202026-02-14 → 2026-02-17 · 9 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
○ 2026-02-16 02:13:54
○ 2026-02-16 12:39:12
● 2026-02-16 21:54:28
○ 2026-02-17 00:19:18
○ 2026-02-17 01:21:36
● 2026-02-17 03:14:12
● 2026-02-17 03:14:18
●A3.162.125.312026-02-14 → 2026-02-17 · 9 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
○ 2026-02-16 02:13:54
○ 2026-02-16 12:39:12
● 2026-02-16 21:54:28
○ 2026-02-17 00:19:18
○ 2026-02-17 01:21:36
● 2026-02-17 03:14:12
● 2026-02-17 03:14:18
●A3.162.125.562026-02-14 → 2026-02-17 · 9 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
○ 2026-02-16 02:13:54
○ 2026-02-16 12:39:12
● 2026-02-16 21:54:28
○ 2026-02-17 00:19:18
○ 2026-02-17 01:21:36
● 2026-02-17 03:14:12
● 2026-02-17 03:14:18
●A3.162.125.952026-02-14 → 2026-02-17 · 9 obs
○ 2018-10-20 17:59:56
● 2026-02-14 23:56:20
○ 2026-02-16 02:13:54
○ 2026-02-16 12:39:12
● 2026-02-16 21:54:28
○ 2026-02-17 00:19:18
○ 2026-02-17 01:21:36
● 2026-02-17 03:14:12
● 2026-02-17 03:14:18
●PTR192.187.217.203.in-addr.arpa.sim.edu.sg2017-07-08 → 2026-02-17 · 2 obs
● 2017-07-08 06:38:02
● 2026-02-17 03:14:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
sgns4.apnic.net, dsany4.sgnic.sg, dsany3.sgnic.sg, pch.sgzones.sg...10 records
sim.edu.sgns-574.awsdns-07.net, ns-1605.awsdns-08.co.uk, ns-138.awsdns-17.com, ns-1448.awsdns-53.org-

✅ Authoritative Response

Server: 205.251.192.138

NS records: ns-574.awsdns-07.net, ns-1605.awsdns-08.co.uk, ns-138.awsdns-17.com, ns-1448.awsdns-53.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sim.edu.sg (unsigned zone)

⏱️ Timing

Total: 3774ms | Queries: -

📄 Records

TypeCountSample Data
A43.162.125.95, 3.162.125.56...
NS4ns-138.awsdns-17.com, ns-1448.awsdns-53.org...
MX1sim-edu-sg.mail.protection.outlook.com (
TXT17BFXzZBgYMPVFoT5fejzQa/WwmUdMduFtDvEa5fR7, MS=ms47186272...
SOA1ns-1605.awsdns-08.co.uk awsdns-hostmaste

📌 Glue Records Collected

Total: 10

In-bailiwick: 8 (dsany4.sgnic.sg, dsany4.sgnic.sg, dsany3.sgnic.sg...)

Out-of-bailiwick: 2 (ns4.apnic.net, ns4.apnic.net)

AI analysis

sim.edu.sg is a parent of libproxy.sim.edu.sg, smtp1.sim.edu.sg, smtp2.sim.edu.sg, pd.sim.edu.sg, loadbalancer.sim.edu.sg and a few other host names.

sim.edu.sg points to four IP numbers: 3.162.125.20, 3.162.125.31, 3.162.125.56 and 3.162.125.95.

Other host names including www.fleetback.com, d2uuf61t0oke8f.cloudfront.net, surface-math-fn-us-east-1.lambdas.propelleraero.com, d2bmgw4npqhwwf.cloudfront.net and staging.cloud.dgfx.us share IP numbers with sim.edu.sg.

sim.edu.sg is delegated to four name servers: ns-138.awsdns-17.com, ns-574.awsdns-07.net, ns-1448.awsdns-53.org and ns-1605.awsdns-08.co.uk.

sim.edu.sg at least partially shares name servers with other domains, including enitelip.net.ni, gnomic.com.au, d1ydvjix4e3en3.cloudfront.net, pantenealtinkelebekodulleri.com and europeassistance.org.

These name servers are commonly used with ns-24.awsdns-03.com, ns-981.awsdns-58.net, ns-1900.awsdns-45.co.uk, ns-695.awsdns-22.net, ns-1355.awsdns-41.org, ns-1633.awsdns-12.co.uk and ns-1068.awsdns-05.org.

Hosts with two IP numbers:

Host ns-138.awsdns-17.com points to 2600:9000:5300:8a00::1 and 205.251.192.138

Host ns-574.awsdns-07.net points to 2600:9000:5302:3e00::1 and 205.251.194.62

Host ns-1448.awsdns-53.org points to 2600:9000:5305:a800::1 and 205.251.197.168

Host ns-1605.awsdns-08.co.uk points to 2600:9000:5306:4500::1 and 205.251.198.69

sim.edu.sg is handled by a single mail server, sim-edu-sg.mail.protection.outlook.com.

sim-edu-sg.mail.protection.outlook.com points to two IPs: 213.199.154.23 and 213.199.154.87.