mail.ustclug.org - robtex.com

mail.ustclug.org

DNSSEC⚠️ Not signed
A2001:da8:d800:22::123🇨🇳 CNGI-HEF-IX-AS-AP2001:da8:d800::/48
PTRlug.ustc.edu.cn
A2001:da8:d800:931::153🇨🇳 CNGI-HEF-IX-AS-AP2001:da8:d800::/48
A202.38.93.153🇨🇳 ERX-CERNET-BKB202.38.64.0/19 Proxy-registered route object
A202.141.162.123🇨🇳 CHINANET-BACKBONE202.141.160.0/20 China Telecom Global Limited
TXTv=spf1 include:mailgun.org ~all

ustclug.org

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:22c5🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A2606:4700:3033::ac43:a477🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.21.34.197Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.67.164.119🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns-a.ustclug.org ⭐
NSns-b.ustclug.org
NSns-c.ustclug.org
MXsmtp.google.com ⭐
TXT734941312-18191251
TXTv=spf1 a:ip-list.mail.ustclug.org include:_spf.google.com include:spf.protect...
TXTMS=ms43950213
TXTgoogle-site-verification=ibXIjx6-PLlu9n-Pw1CRjCiQ75nJTRSWi6Y-rm4nznI
TXTca3-8a295376a5bc449482347bb09fc07add
TXTverification-code-site-App_feishu=IDMUhY2RhXjsCjXGr801
SOAns-a.ustclug.orglug@ustc.edu.cn 2026-02-24 #1
📈 Tranco rank: #137,238

MX for

pxe.ustc.edu.cn
mirrors.ustc.edu.cn

Previously MX for

ustclug.org
blog.ustc.edu.cn
freeshell.ustc.edu.cn
lug.ustc.edu.cn
dns.lug.ustc.edu.cn
ring0.me
jenny42.com

Same first word

mail.gov.il
mail.ie
mail.co.cr
mail.pa
mail.schaeffler
mail.gov.to
mail.berlin
mail.dynns.com
mail.go.id
mail.rec.br
mail.com.ps
mail.(0x6c6f6c697461)punk.jp
mail.sc
mail.gov.ie
mail.company
mail.gov.mn
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mail.sdscloud.pl
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mail.is
mail.gov.zw
mail.id
mail.tr
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mail.media
mail.vinnica.ua
mail.readymade.jp
mail.raindrop.jp
mail.tj
mail.mydissent.net
mail.spdns.org
mail.fish
mail.pp.ua
mail.fun
mail.no-ip.net
mail.mn
mail.mydns.bz
mail.fem.jp
mail.health
mail.s3.amazonaws.com
mail.com.kg
mail.nra
mail.couchpotatofries.org
mail.radio.fm
mail.od.ua
mail.ms
mail.boleslawiec.pl
mail.mydns.vc
mail.lutsk.ua
mail.kz
mail.im
mail.kaas.gg
mail.it.com
mail.gov.mg
mail.ss
mail.co
mail.tc
mail.gda.pl
mail.world
mail.pe
mail.sunnyday.jp
mail.group
mail.gov
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mail.mx
mail.cy
mail.gov.ae
mail.com.ba
mail.co.zw
mail.org
mail.pixolino.com
mail.ug
mail.ly
mail.gs
mail.bg
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mail.vip
mail.red
mail.co.il
mail.pf
mail.com.mx
mail.uy
mail.gt
mail.training
mail.cd
mail.in.ua
mail.cx
mail.gm
mail.su
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mail.hosting
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mail.fm
mail.mil

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A2001:da8:d800:22::1232001:da8:d800:931::153202.141.162.123202.38.93.153202.141.176.93202.141.178.13
●A2001:da8:d800:22::1232015-07-01 → 2026-03-30 · 2 obs
● 2015-07-01 11:52:46
● 2026-03-30 05:39:52
●A2001:da8:d800:931::1532015-07-01 → 2026-03-30 · 2 obs
● 2015-07-01 11:52:46
● 2026-03-30 05:39:52
●A202.141.162.1232015-07-01 → 2026-03-30 · 2 obs
● 2015-07-01 11:52:46
● 2026-03-30 05:39:52
○A202.141.176.932015-07-01 → 2016-09-18 · 4 obs
● 2015-07-01 11:52:46
● 2016-09-18 23:41:12
○ 2017-06-28 13:37:08
○ 2026-03-30 05:39:52
○A202.141.178.132017-06-28 → 2021-06-09 · 5 obs
○ 2016-09-18 23:41:12
● 2017-06-28 13:37:08
● 2021-06-09 12:36:10
○ 2026-02-15 01:01:00
○ 2026-03-30 05:39:52
●A202.38.93.1532015-07-01 → 2026-03-30 · 2 obs
● 2015-07-01 11:52:46
● 2026-03-30 05:39:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org-
ustclug.orgns-b.ustclug.org, ns-c.ustclug.org, ns-a.ustclug.org5 records

✅ Authoritative Response

Server:202.38.93.156

NS records: ns-b.ustclug.org, ns-c.ustclug.org, ns-a.ustclug.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ustclug.org (unsigned zone)

⏱️ Timing

Total: 4456ms | Queries: -

📄 Records

TypeCountSample Data
A2202.141.162.123, 202.38.93.153
AAAA22001:da8:d800:22::123, 2001:da8:d800:931::153
TXT1v=spf1 include:mailgun.org ~all

📌 Glue Records Collected

Total: 5

In-bailiwick: 5 (ns-a.ustclug.org, ns-b.ustclug.org, ns-c.ustclug.org...)

Analysis

Mail Server Role

mail.ustclug.org serves as the mail server for pxe.ustc.edu.cn and mirrors.ustc.edu.cn.

IP Addresses

mail.ustclug.org resolves to four IPs: 2001:da8:d800:22::123, 2001:da8:d800:931::153, 202.38.93.153 and 202.141.162.123.