sheffcol.ac.uk - robtex.com

sheffcol.ac.uk

DNSSEC⚠️ Not signed
A194.83.24.247🇬🇧 JANET194.80.0.0/14 JANET(UK) Network Operations Centre Third floor 15 Fetter Lane London EC4A 1BW United Kingdom
PTRwww.sheffcol.ac.uk
NSns1.sheffcol.ac.uk ⭐
A194.83.25.14🇬🇧 JANET194.80.0.0/14 JANET(UK) Network Operations Centre Third floor 15 Fetter Lane London EC4A 1BW United Kingdom
PTRaluminium.sheffcol.ac.uk
NSns4.ja.net
A2001:630:0:47::42🇬🇧 JANET2001:630::/32 JANET(UK) Network Operations Centre Third floor 15 Fetter Lane London EC4A 1BW United Kingdom
PTRns4.ja.net
A193.62.157.66🇬🇧 JANET193.60.0.0/14 JANET(UK) Network Operations Centre Third floor 15 Fetter Lane London EC4A 1BW United Kingdom
PTRns4.ja.net
MXd215463.a.ess.uk.barracudanetworks.com ⭐
A18.133.136.186🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
A18.133.136.187🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
A18.133.136.188🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
MXd215463.b.ess.uk.barracudanetworks.com ⭐
A18.133.136.186🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
A18.133.136.187🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
A18.133.136.188🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix
PTRmail.ess.uk.barracuda.com
TXTMS=ms16264962
TXTopenai-domain-verification=dv-Qp4HTlEk7eWgEypBrHcS6XlF
TXTgoogle-site-verification=A9QA5oO109TN6w6J-hmOqpo7u-eggxeLEYWkNQo-wCk
TXTapple-domain-verification=YJgiNf6JxXLkGPok
TXTwork-accounts-domain-verification=vgL6dXogLA4lgHPbLVek8vqeT1WxqF
TXTautodesk-domain-verification=D5Ku5Njiqr6rpe1cqMZn
TXTadobe-idp-site-verification=dc579b3401e0f3982c8f2c8ea309ab658dd928b24e4607aa9...
TXTv=spf1 ip4:194.83.25.14 ip4:194.83.24.240 ip4:198.15.116.21 ip4:184.95.37.11 ...
TXT7390AA62-46EB-4686-B60A-768A345B10F3
TXTgoogle-site-verification=TiJE5J8Mt8WTkrlvMqPoXK5abZ1nzwBArGD_eDq2vLE
TXTgoogle-site-verification=hNcnEvcjkt6LQB9h2bonI19LwYvlTBAXAV-8Umb9Amw
SOAns1.sheffcol.ac.ukpostmaster@sheffcol.ac.uk 2026-04-13 #3

ac.uk

DNSSEC🔒 Signed (DS record present)
NSns0.ja.net ⭐
NSauth03.ns.uu.net
NSdns-3.dfn.de
NSns1.surfnet.nl
NSns2.ja.net
NSns3.ja.net
NSns4.ja.net
SOAns0.ja.netoperations@ja.net 2026-04-13 #60
rank #373089 globally
rank #22883 in the tld
WOT: SAFE (76/100)
WOT: SAFE (79/100)

Subdomains

idp.sheffcol.ac.uk
city-firewall-ext.sheffcol.ac.uk
sac.sheffcol.ac.uk
city-firewall-ext-1.sheffcol.ac.uk
ns2.sheffcol.ac.uk
student.sheffcol.ac.uk
noc.sheffcol.ac.uk
ns1.sheffcol.ac.uk
thehub.sheffcol.ac.uk
www.sheffcol.ac.uk
ns5.sheffcol.ac.uk

Same first word

sheffcol.ac.uk

Similar names

schoeffl.de
schoeffl.at
schoffel.at
schoffel.nl
schoffel.co.uk
schoffel.com
schoffel.info
fcelshof.nl
schoffel.de
schoffel.eu
schoeffl.com
choffles.com

DNS History

9 records (5 active, 4 former)

20162017201820192020202120222023202420252026NSns1.sheffcol.ac.ukns4.ja.netns2.sheffcol.ac.ukMXd215463.a.ess.uk.barracudanetworks.comd215463.b.ess.uk.barracudanetworks.comtestsmtp.sheffcol.ac.uky-sophosemail.sheffcol.ac.ukA194.83.24.247194.83.25.162
●NSns1.sheffcol.ac.uk2015-08-16 → 2026-04-14 · 2 obs
● 2015-08-16 00:24:52
● 2026-04-14 05:21:28
○NSns2.sheffcol.ac.uk2015-08-16 → 2026-02-22 · 4 obs
● 2015-08-16 00:24:52
● 2026-02-22 21:05:12
○ 2026-02-24 17:21:56
○ 2026-04-14 05:21:28
●NSns4.ja.net2015-08-16 → 2026-04-14 · 15 obs
● 2015-08-16 00:24:52
● 2026-03-14 20:38:56
○ 2026-03-14 22:16:48
● 2026-03-17 22:24:46
● 2026-03-29 15:58:54
○ 2026-03-31 03:06:20
○ 2026-04-01 15:57:12
● 2026-04-02 10:55:38
● 2026-04-03 16:26:52
○ 2026-04-04 20:51:54
● 2026-04-04 23:10:42
● 2026-04-06 14:37:22
○ 2026-04-08 20:43:20
● 2026-04-09 14:24:14
● 2026-04-14 05:21:28
●MXd215463.a.ess.uk.barracudanetworks.com2026-02-14 → 2026-04-14 · 16 obs
○ 2018-07-27 06:55:40
● 2026-02-14 16:12:06
● 2026-03-14 20:38:56
○ 2026-03-14 22:16:48
● 2026-03-17 22:24:46
● 2026-03-29 15:58:54
○ 2026-03-31 03:06:20
○ 2026-03-31 19:53:00
● 2026-04-01 15:57:12
● 2026-04-03 16:26:52
○ 2026-04-04 20:51:54
● 2026-04-04 23:10:42
● 2026-04-06 14:37:22
○ 2026-04-08 20:43:20
● 2026-04-09 14:24:14
● 2026-04-14 05:21:28
●MXd215463.b.ess.uk.barracudanetworks.com2026-02-14 → 2026-04-14 · 16 obs
○ 2018-07-27 06:55:40
● 2026-02-14 16:12:06
● 2026-03-14 20:38:56
○ 2026-03-14 22:16:48
● 2026-03-17 22:24:46
● 2026-03-29 15:58:54
○ 2026-03-31 03:06:20
○ 2026-03-31 19:53:00
● 2026-04-01 15:57:12
● 2026-04-03 16:26:52
○ 2026-04-04 20:51:54
● 2026-04-04 23:10:42
● 2026-04-06 14:37:22
○ 2026-04-08 20:43:20
● 2026-04-09 14:24:14
● 2026-04-14 05:21:28
○MXtestsmtp.sheffcol.ac.uk2015-08-16 → 2015-08-16 · 3 obs
● 2015-08-16 00:24:52
○ 2015-09-16 16:18:24
○ 2026-04-14 05:21:28
○MXy-sophosemail.sheffcol.ac.uk2015-09-16 → 2018-07-27 · 5 obs
○ 2015-08-16 00:24:52
● 2015-09-16 16:18:24
● 2018-07-27 06:55:40
○ 2026-02-14 16:12:06
○ 2026-04-14 05:21:28
●A194.83.24.2472017-06-29 → 2026-04-14 · 16 obs
○ 2017-01-16 08:54:18
● 2017-06-29 00:41:42
● 2026-03-14 20:38:56
○ 2026-03-14 22:16:48
● 2026-03-17 22:24:46
● 2026-03-29 15:58:54
○ 2026-03-31 03:06:20
○ 2026-04-01 15:57:12
● 2026-04-02 10:55:38
● 2026-04-03 16:26:52
○ 2026-04-04 20:51:54
● 2026-04-04 23:10:42
● 2026-04-06 14:37:22
○ 2026-04-08 20:43:20
● 2026-04-09 14:24:14
● 2026-04-14 05:21:28
○A194.83.25.1622015-10-23 → 2017-01-16 · 4 obs
● 2015-10-23 14:37:42
● 2017-01-16 08:54:18
○ 2017-06-29 00:41:42
○ 2026-04-14 05:21:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
uknsa.nic.uk, nsb.nic.uk, nsc.nic.uk, nsd.nic.uk...-
ac.ukdns-3.dfn.de, ns2.ja.net, ns1.surfnet.nl, ns4.ja.net...-
sheffcol.ac.ukns4.ja.net, ns1.sheffcol.ac.uk1 record

✅ Authoritative Response

Server:193.62.157.66

NS records: ns4.ja.net, ns1.sheffcol.ac.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sheffcol.ac.uk (unsigned zone)

⏱️ Timing

Total: 986ms | Queries: -

📄 Records

TypeCountSample Data
A1194.83.24.247
NS2ns1.sheffcol.ac.uk, ns4.ja.net
MX2d215463.b.ess.uk.barracudanetworks.com (, d215463.a.ess.uk.barracudanetworks.com (
TXT117390AA62-46EB-4686-B60A-768A345B10F3, adobe-idp-site-verification=dc579b3401e0...
SOA1ns1.sheffcol.ac.uk postmaster.sheffcol.a

📌 Glue Records Collected

Total: 1

In-bailiwick: 1 (ns1.sheffcol.ac.uk)

Analysis

Hierarchy

sheffcol.ac.uk is the parent of idp.sheffcol.ac.uk, city-firewall-ext.sheffcol.ac.uk, sac.sheffcol.ac.uk, city-firewall-ext-1.sheffcol.ac.uk, ns2.sheffcol.ac.uk and a few other host names.

IP Addresses

sheffcol.ac.uk maps to IP address 194.83.24.247.

Other host names, for example, www.sheffcol.ac.uk share IP numbers with sheffcol.ac.uk.

Name Servers

Two name servers ns4.ja.net and ns1.sheffcol.ac.uk are delegated to sheffcol.ac.uk.

sheffcol.ac.uk uses the same name server setup as other domains, for instance 25.83.194.in-addr.arpa.

sheffcol.ac.uk at least partially shares name servers with other domains such as 150.53.143.in-addr.arpa, 250.62.193.in-addr.arpa, median.ac.uk, gcu.ac.uk and im.

These name servers are often used together with ns2.ja.net, ns3.ja.net, ns1.ja.net, dns0.brad.ac.uk, dns1.brad.ac.uk, blox1.cen.brad.ac.uk, ns0.ja.net, ns0.londonmet.ac.uk, ns2.londonmet.ac.uk and ns01.lincoln.ac.uk.

Host names by IP count:

Two IP numbers: The host name ns4.ja.net points to 2001:630:0:47::42 and 193.62.157.66.

One IP number: The host name ns1.sheffcol.ac.uk points to 194.83.25.14.

Mail Servers

Two mail servers handle sheffcol.ac.uk: d215463.a.ess.uk.barracudanetworks.com and d215463.b.ess.uk.barracudanetworks.com.

Host names with three IP numbers

d215463.a.ess.uk.barracudanetworks.com points to: 18.133.136.186, 18.133.136.187 and 18.133.136.188

d215463.b.ess.uk.barracudanetworks.com points to: 18.133.136.186, 18.133.136.187 and 18.133.136.188

Note that d215463.a.ess.uk.barracudanetworks.com and d215463.b.ess.uk.barracudanetworks.com both point to the same three IPs: 18.133.136.186, 18.133.136.187 and 18.133.136.188

Names pointing to 18.133.136.186: d215463.a.ess.uk.barracudanetworks.com and d215463.b.ess.uk.barracudanetworks.com

Names pointing to 18.133.136.187: d215463.a.ess.uk.barracudanetworks.com and d215463.b.ess.uk.barracudanetworks.com

Names pointing to 18.133.136.188: d215463.a.ess.uk.barracudanetworks.com and d215463.b.ess.uk.barracudanetworks.com