`up.pt`

DNSSEC	🔒 Signed (DS record present)
A	2001:690:2200:a10::13^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
		PTR	`reit.up.pt`
		PTR	`www.reit.up.pt`
A	193.137.55.13^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
NS	`ns1.up.pt` ⭐
		A	2001:690:2200:a10::30^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
		A	193.137.55.30^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`ns1.up.pt`
NS	`ns02.fccn.pt`
		A	2001:690:a80:4001::200^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`ns02.fccn.pt`
		A	193.136.2.228^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
NS	`ns2.up.pt`
		A	2001:690:2200:a10::31^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
		A	193.137.55.31^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`ns2.up.pt`
NS	`ns3.up.pt`
		A	2001:690:2200:a10::32^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`ns3.up.pt`
		A	193.137.55.32^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`ns3.up.pt`
NS	`ns4.up.pt`
MX	`mx01.up.pt` ⭐
		A	2001:690:2200:a10::24^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`mx01.up.pt`
		A	193.137.55.24^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
MX	`mx02.up.pt` ⭐
		A	2001:690:2200:a10::25^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`mx02.up.pt`
		A	193.137.55.25^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`mx02.up.pt`
			PTR	`mx02.uporto.dnssec.pt`
MX	`mx03.up.pt` ⭐
		A	2001:690:2200:a10::44^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`mx03.up.pt`
		A	193.137.55.44^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`mx03.up.pt`
MX	`mx04.up.pt` ⭐
		A	2001:690:2200:a10::45^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
		A	193.137.55.45^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`mx04.up.pt`
MX	`mx05.up.pt` ⭐
		A	2001:690:2200:a10::46^{🇵🇹 RCCN2001:690::/32 The Portuguese National Research & Education Network}
			PTR	`mx05.up.pt`
		A	193.137.55.46^{🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET}
			PTR	`mx05.up.pt`
MX	`mx06.up.pt` ⭐
TXT	`HARICA-odgH2dLCMNQenduoC39`
TXT	`google-site-verification=7hF_ZD6DOKHK8MLopRWBZvby2A0gBGVQi-kvLqdkxGo`
TXT	`v=spf1 mx include:spf4.up.pt include:spf6.up.pt include:spf.protection.outloo...`
TXT	`google-site-verification=eMy_WDqKW1lght0VDzrPfEFh0osBa3BtcILLuMxX5jI`
TXT	`OIIBdX0Cy1Ay7dAnhFQmuuqdTwtlthv23weewGfmKBDcfrmo2WOrjGfPx8ZFpan5QNfIvto7Jp/S5...`
TXT	`adobe-idp-site-verification=491feeefc019f19c6030bf87ace8477470d9a78bb3e660161...`
TXT	`MS=ms16675765`
SOA	`ns1.up.pt`it@up.pt serial=1773153603

`pt`

	DNSSEC	🔒 Signed (DS record present)
	NS	`curiosity.dns.pt` ⭐ 🔒
	NS	`a.dns.pt` 🔒
	NS	`b.dns.pt` 🔒
	NS	`c.dns.pt` 🔒
	NS	`d.dns.pt` 🔒
	NS	`e.dns.pt` 🔒
	NS	`g.dns.pt` 🔒
	NS	`h.dns.pt` 🔒
	NS	`ns.dns.br` ⚠️ Not in parent delegation 🔒
	NS	`ns2.nic.fr` ⚠️ Not in parent delegation 🔒
	SOA	`curiosity.dns.pt`request@dns.pt 2026-03-04 #11

rank #3613 globally
rank #3 in the tld
This domain name "up.pt" represents Universidade do Porto, a public university located in Porto, Portugal. It is one of the largest and most prestigious higher education institutions in Portugal. The domain name is used for the university's official website, providing various online services and information for students, faculty, and others interested in the institution.WOT: SAFE (91/100)
📈 Tranco rank: #8,852

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DNS History

21 records (13 active, 8 former)

○NSdns1.up.pt2015-09-03 → 2016-01-16 · 4 obs

● 2015-09-03 11:01:28
● 2016-01-16 14:20:24
○ 2016-01-24 15:59:48
○ 2026-03-12 03:32:08

○NSdns3.up.pt2015-09-03 → 2016-01-16 · 4 obs

● 2015-09-03 11:01:28
● 2016-01-16 14:20:24
○ 2016-01-24 15:59:48
○ 2026-03-12 03:32:08

○NSdns4.up.pt2015-09-03 → 2016-01-16 · 4 obs

● 2015-09-03 11:01:28
● 2016-01-16 14:20:24
○ 2016-01-24 15:59:48
○ 2026-03-12 03:32:08

●NSns02.fccn.pt2026-02-14 → 2026-03-12 · 33 obs

○ 2016-01-24 15:59:48
● 2026-02-14 17:03:26
● 2026-02-15 11:47:50
○ 2026-02-15 12:27:14
● 2026-02-15 13:12:34
● 2026-02-20 17:02:18
○ 2026-02-20 19:29:24
● 2026-02-20 22:52:22
● 2026-02-23 15:52:44
○ 2026-02-23 16:49:44
● 2026-02-23 23:22:12
● 2026-02-24 07:38:40
○ 2026-02-24 10:40:10
● 2026-02-24 11:35:02
● 2026-02-24 20:10:54
○ 2026-02-25 00:09:36
● 2026-02-25 01:29:22
● 2026-02-25 22:37:40
○ 2026-02-26 00:22:26
● 2026-02-26 01:13:32
● 2026-03-02 04:29:56
○ 2026-03-02 08:51:12
● 2026-03-02 15:26:32
● 2026-03-03 18:37:08
○ 2026-03-03 22:13:32
● 2026-03-03 23:13:54
● 2026-03-07 10:42:50
○ 2026-03-07 12:44:24
● 2026-03-07 17:38:54
● 2026-03-11 00:57:20
○ 2026-03-11 04:30:22
● 2026-03-11 05:58:04
● 2026-03-12 03:32:08

●NSns1.up.pt2016-01-24 → 2026-03-12 · 3 obs

○ 2016-01-16 14:20:24
● 2016-01-24 15:59:48
● 2026-03-12 03:32:08

●NSns2.up.pt2016-01-24 → 2026-03-12 · 3 obs

○ 2016-01-16 14:20:24
● 2016-01-24 15:59:48
● 2026-03-12 03:32:08

●NSns3.up.pt2016-01-24 → 2026-03-12 · 3 obs

○ 2016-01-16 14:20:24
● 2016-01-24 15:59:48
● 2026-03-12 03:32:08

●NSns4.up.pt2016-01-24 → 2026-03-12 · 3 obs

○ 2016-01-16 14:20:24
● 2016-01-24 15:59:48
● 2026-03-12 03:32:08

●MXmx01.up.pt2021-03-12 → 2026-03-12 · 100 obs

○ 2020-03-05 15:06:18
● 2021-03-12 12:29:34
● 2026-02-18 13:54:26
○ 2026-02-18 17:16:50
● 2026-02-18 19:51:12
○ 2026-02-18 23:49:44
● 2026-02-19 00:29:20
● 2026-02-19 06:17:58
○ 2026-02-19 08:24:44
● 2026-02-19 09:08:16
● 2026-02-19 09:55:48
○ 2026-02-19 10:38:32
● 2026-02-19 11:09:08
● 2026-02-19 11:41:50
○ 2026-02-19 21:35:36
● 2026-02-20 01:14:50
● 2026-02-20 01:58:44
○ 2026-02-20 10:15:18
● 2026-02-20 12:16:42
● 2026-02-20 17:02:18
○ 2026-02-20 19:29:24
● 2026-02-20 22:52:22
● 2026-02-20 23:37:38
○ 2026-02-21 01:11:52
● 2026-02-21 09:30:00
○ 2026-02-21 10:31:42
● 2026-02-21 16:07:14
● 2026-02-22 07:10:24
○ 2026-02-22 09:10:08
● 2026-02-22 14:55:20
● 2026-02-23 00:35:02
○ 2026-02-23 01:16:08
● 2026-02-23 04:08:36
● 2026-02-23 09:23:16
○ 2026-02-23 10:43:06
● 2026-02-23 11:52:48
● 2026-02-23 15:52:44
○ 2026-02-23 16:49:44
● 2026-02-23 23:22:12
● 2026-02-24 01:15:30
○ 2026-02-24 05:32:20
● 2026-02-24 07:38:40
○ 2026-02-24 10:40:10
● 2026-02-24 11:35:02
● 2026-02-24 16:59:02
○ 2026-02-24 19:20:14
● 2026-02-24 20:10:54
● 2026-02-25 04:02:34
○ 2026-02-25 15:56:36
● 2026-02-25 22:00:50
● 2026-02-25 22:37:40
○ 2026-02-26 00:22:26
● 2026-02-26 01:13:32
● 2026-02-26 01:44:58
○ 2026-02-26 04:21:42
● 2026-02-26 05:51:46
○ 2026-02-26 11:55:18
● 2026-02-26 13:22:36
○ 2026-02-27 03:33:48
● 2026-02-27 09:50:36
● 2026-02-28 04:42:02
○ 2026-02-28 06:14:50
● 2026-02-28 07:27:10
● 2026-03-01 14:40:34
○ 2026-03-01 21:24:22
● 2026-03-01 22:21:52
● 2026-03-02 04:29:56
○ 2026-03-02 08:51:12
● 2026-03-02 15:26:32
● 2026-03-03 16:35:54
○ 2026-03-03 18:37:08
○ 2026-03-03 22:13:32
● 2026-03-03 23:13:54
● 2026-03-04 01:43:44
○ 2026-03-04 04:23:46
● 2026-03-04 05:11:20
○ 2026-03-04 13:19:28
● 2026-03-04 20:19:50
● 2026-03-05 05:24:24
○ 2026-03-05 11:27:52
● 2026-03-05 17:43:02
● 2026-03-05 22:27:42
○ 2026-03-05 23:32:34
● 2026-03-06 00:08:30
● 2026-03-06 11:27:56
○ 2026-03-06 18:07:02
● 2026-03-06 20:37:56
● 2026-03-07 10:42:50
○ 2026-03-07 12:44:24
● 2026-03-07 17:38:54
● 2026-03-08 02:28:30
○ 2026-03-08 04:45:06
● 2026-03-08 07:59:56
● 2026-03-11 00:57:20
○ 2026-03-11 04:30:22
● 2026-03-11 05:58:04
● 2026-03-12 01:07:32
○ 2026-03-12 01:53:08
● 2026-03-12 03:32:02
● 2026-03-12 03:32:08

●MXmx02.up.pt2021-03-12 → 2026-03-12 · 100 obs

●MXmx03.up.pt2021-03-12 → 2026-03-12 · 100 obs

●MXmx04.up.pt2021-03-12 → 2026-03-12 · 100 obs

●MXmx05.up.pt2021-03-12 → 2026-03-12 · 100 obs

●MXmx06.up.pt2021-03-12 → 2026-03-12 · 100 obs

○MXmxu.up.pt2017-09-08 → 2020-03-05 · 5 obs

○ 2017-08-19 13:33:54
● 2017-09-08 21:24:04
● 2020-03-05 15:06:18
○ 2021-03-12 12:29:34
○ 2026-03-12 03:32:08

○MXrelay.up.pt2017-09-08 → 2018-11-27 · 5 obs

○ 2017-08-19 13:33:54
● 2017-09-08 21:24:04
● 2018-11-27 06:50:56
○ 2018-12-26 11:43:34
○ 2026-03-12 03:32:08

○MXrelay1.up.pt2015-09-03 → 2017-08-19 · 4 obs

● 2015-09-03 11:01:28
● 2017-08-19 13:33:54
○ 2017-09-08 21:24:04
○ 2026-03-12 03:32:08

○MXrelay2.up.pt2015-09-03 → 2017-08-19 · 4 obs

● 2015-09-03 11:01:28
● 2017-08-19 13:33:54
○ 2017-09-08 21:24:04
○ 2026-03-12 03:32:08

○A193.137.29.382016-07-12 → 2016-09-04 · 5 obs

○ 2015-10-19 12:36:46
● 2016-07-12 22:14:18
● 2016-09-04 00:29:36
○ 2016-09-15 14:03:58
○ 2026-03-12 03:32:08

●A193.137.55.132015-10-19 → 2026-03-12 · 99 obs

● 2015-10-19 12:36:46
● 2026-02-14 21:15:40
○ 2026-02-14 23:41:18
● 2026-02-15 03:08:58
● 2026-02-18 13:54:26
○ 2026-02-18 17:16:50
● 2026-02-18 19:51:12
○ 2026-02-18 23:49:44
● 2026-02-19 00:29:20
● 2026-02-19 06:17:58
○ 2026-02-19 08:24:44
● 2026-02-19 09:08:16
● 2026-02-19 09:55:48
○ 2026-02-19 10:38:32
● 2026-02-19 11:09:08
● 2026-02-19 11:41:50
○ 2026-02-19 21:35:36
● 2026-02-20 01:14:50
○ 2026-02-20 01:58:44
● 2026-02-20 10:15:18
● 2026-02-20 17:02:18
○ 2026-02-20 19:29:24
● 2026-02-20 22:52:22
● 2026-02-20 23:37:38
○ 2026-02-21 01:11:52
● 2026-02-21 09:30:00
○ 2026-02-21 10:31:42
● 2026-02-21 16:07:14
● 2026-02-21 19:31:14
○ 2026-02-21 23:36:32
● 2026-02-22 01:29:20
● 2026-02-23 00:35:02
○ 2026-02-23 01:16:08
● 2026-02-23 04:08:36
● 2026-02-23 09:23:16
○ 2026-02-23 10:43:06
● 2026-02-23 11:52:48
● 2026-02-23 15:52:44
○ 2026-02-23 16:49:44
● 2026-02-23 23:22:12
● 2026-02-24 01:15:30
○ 2026-02-24 05:32:20
● 2026-02-24 07:38:40
○ 2026-02-24 10:40:10
● 2026-02-24 11:35:02
● 2026-02-24 20:10:54
○ 2026-02-25 00:09:36
○ 2026-02-25 01:29:22
● 2026-02-25 02:39:56
● 2026-02-25 04:02:34
○ 2026-02-25 15:56:36
● 2026-02-25 22:00:50
● 2026-02-25 22:37:40
○ 2026-02-26 00:22:26
● 2026-02-26 01:13:32
● 2026-02-26 01:44:58
○ 2026-02-26 04:21:42
● 2026-02-26 05:51:46
● 2026-02-26 13:22:36
○ 2026-02-27 03:33:48
● 2026-02-27 09:50:36
● 2026-02-28 04:42:02
○ 2026-02-28 06:14:50
● 2026-02-28 07:27:10
● 2026-03-02 04:29:56
○ 2026-03-02 08:51:12
● 2026-03-02 15:26:32
● 2026-03-03 16:35:54
○ 2026-03-03 18:37:08
○ 2026-03-03 22:13:32
● 2026-03-03 23:13:54
● 2026-03-04 01:43:44
○ 2026-03-04 04:23:46
● 2026-03-04 05:11:20
○ 2026-03-04 13:19:28
● 2026-03-04 20:19:50
● 2026-03-05 20:07:26
○ 2026-03-05 22:27:42
○ 2026-03-05 23:32:34
● 2026-03-06 00:08:30
● 2026-03-06 11:27:56
○ 2026-03-06 18:07:02
● 2026-03-06 20:37:56
○ 2026-03-06 23:09:58
● 2026-03-07 02:14:50
● 2026-03-07 07:35:06
○ 2026-03-07 09:07:16
● 2026-03-07 10:42:50
○ 2026-03-07 12:44:24
● 2026-03-07 17:38:54
● 2026-03-07 22:55:14
○ 2026-03-08 01:20:46
● 2026-03-08 02:28:30
○ 2026-03-08 04:45:06
● 2026-03-08 07:59:56
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●A2001:690:2200:a10::132026-02-14 → 2026-03-12 · 91 obs

○ 2016-09-15 14:03:58
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● 2026-03-12 03:32:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pt	a.dns.pt, b.dns.pt, c.dns.pt, d.dns.pt...	-
up.pt	ns3.up.pt, ns4.up.pt, ns2.up.pt, ns1.up.pt...	10 records

✅ Authoritative Response

Server: 193.137.55.30

NS records: ns3.up.pt, ns4.up.pt, ns2.up.pt, ns1.up.pt, ns02.fccn.pt

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 825ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`193.137.55.13`
AAAA	1	`2001:690:2200:a10::13`
NS	5	`ns3.up.pt, ns2.up.pt...`
MX	6	`mx03.up.pt (pri: 10), mx04.up.pt (pri: 10)...`
TXT	7	`v=spf1 mx include:spf4.up.pt include:spf, OIIBdX0Cy1Ay7dAnhFQmuuqdTwtlthv23weewGfm...`
SOA	1	`ns1.up.pt it.up.pt`

📌 Glue Records Collected

Total: 10

In-bailiwick: 8 (ns4.up.pt, ns3.up.pt, ns2.up.pt...)

Out-of-bailiwick: 2 (ns02.fccn.pt, ns02.fccn.pt)

Analysis

Hierarchy

up.pt is the parent of ermit.up.pt, planetario.up.pt, aleph23as.up.pt, mergingvoices.up.pt, cdup.up.pt and several hundred other host names.

IP Addresses

up.pt points to two IPs: 2001:690:2200:a10::13 and 193.137.55.13.

Other host names, for instance fcna.up.pt, fd.up.pt, www.uporto.pt, alumni.up.pt and fmd.up.pt share IP numbers with up.pt.

Name Servers

up.pt delegates to five name servers: ns02.fccn.pt, ns1.up.pt, ns2.up.pt, ns3.up.pt and ns4.up.pt.

up.pt at least partially shares name servers with other domains such as 253.136.193.in-addr.arpa, 2.210.194.in-addr.arpa, ptcris.pt, 20.232.136.193.in-addr.arpa and arq.up.pt.

These name servers are often used together with ns01.fccn.pt, ns03.fccn.pt, ns2.uevora.pt, ns.uevora.pt, ns3.min-educ.pt, ns4.min-educ.pt, ns.min-financas.pt, ns5.up.pt and netns.fccn.pt.

Host names with two IP numbers:

ns02.fccn.pt points to 2001:690:a80:4001::200 and 193.136.2.228

ns1.up.pt points to 2001:690:2200:a10::30 and 193.137.55.30

ns2.up.pt points to 2001:690:2200:a10::31 and 193.137.55.31

ns3.up.pt points to 2001:690:2200:a10::32 and 193.137.55.32

Mail Servers

up.pt is handled by six mail servers: mx01.up.pt, mx02.up.pt, mx03.up.pt, mx04.up.pt, mx05.up.pt and mx06.up.pt.

up.pt shares mail servers with other domains at least in part, for instance up.edu.pt, alunos.fc.up.pt, fe.up.pt, c3p.up.pt and planetario.up.pt.