`surfsara.org`

DNSSEC	⚠️ Not signed
A	2001:610:108:204d:145:100:20:5^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
A	145.100.20.5^{🇳🇱 SURFNET-NL145.100.0.0/15 145.100.0.0/15 aggregate SURFNET-UNO}
NS	`nsauth1.surfsara.nl` ⭐
		A	2001:610:108:2043::242^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
			PTR	`nsauth1.osd.surfsara.nl`
		A	145.100.12.242^{🇳🇱 SURFNET-NL145.100.0.0/15 145.100.0.0/15 aggregate SURFNET-UNO}
NS	`ns1.surfnet.nl`
		A	2001:610:1:800a:192:87:106:101^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
			PTR	`ns1.surfnet.nl`
		A	192.87.106.101^{🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV}
			PTR	`ns1.surfnet.nl`
NS	`ns1.zurich.surf.net`
		A	2001:620:0:9::1103^{🇨🇭 Switch2001:620::/32 SWITCH, The Swiss Education & Research Network}
			PTR	`ns1.zurich.surf.net`
		A	195.176.255.9^{🇨🇭 Switch195.176.224.0/19 SWITCH-AGGR.102}
			PTR	`ns1.zurich.surf.net`
NS	`ns2.surfnet.nl`
		A	2001:610:3:200a:192:87:36:2^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
			PTR	`ns2.surfnet.nl`
		A	192.87.36.2^{🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV}
			PTR	`ns2.surfnet.nl`
NS	`ns3.surfnet.nl`
		A	2001:610:0:800c:195:169:124:71^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
			PTR	`ns3.surfnet.nl`
		A	195.169.124.71^{🇳🇱 SURFNET-NL195.169.0.0/16 SURFnet CIDR Block VI}
NS	`nsauth2.surfsara.nl`
		A	2001:610:108:2043::243^{🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block}
			PTR	`nsauth2.osd.surfsara.nl`
		A	145.100.12.243^{🇳🇱 SURFNET-NL145.100.0.0/15 145.100.0.0/15 aggregate SURFNET-UNO}
TXT	`HARICA-RBMTT4cg0dLq6y1B8IE`
SOA	`nsauth1.surfsara.nl`dns-admin@surfsara.nl 2026-03-17 #1

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1785932580

Same first word

surfsara.nl

surfsara.eu

surfsara.org

surfsara.net

Similar names

sarasurf.com

urssaafr.fr

DNS History

13 records (8 active, 5 former)

●NSns1.surfnet.nl2026-08-05 → 2026-08-05 · 3 obs

○ 2015-07-26 07:01:26
● 2026-08-05 12:49:00
● 2026-08-05 12:49:02

●NSns1.zurich.surf.net2026-08-05 → 2026-08-05 · 3 obs

○ 2015-07-26 07:01:26
● 2026-08-05 12:49:00
● 2026-08-05 12:49:02

●NSns2.surfnet.nl2026-08-05 → 2026-08-05 · 3 obs

○ 2015-07-26 07:01:26
● 2026-08-05 12:49:00
● 2026-08-05 12:49:02

●NSns3.surfnet.nl2015-07-26 → 2026-08-05 · 2 obs

● 2015-07-26 07:01:26
● 2026-08-05 12:49:02

●NSnsauth1.surfsara.nl2015-07-26 → 2026-08-05 · 2 obs

● 2015-07-26 07:01:26
● 2026-08-05 12:49:02

●NSnsauth2.surfsara.nl2015-07-26 → 2026-08-05 · 2 obs

● 2015-07-26 07:01:26
● 2026-08-05 12:49:02

○MXmta.surfsara.nl2015-07-26 → 2018-08-08 · 4 obs

● 2015-07-26 07:01:26
● 2018-08-08 22:51:18
○ 2026-08-05 12:49:00
○ 2026-08-05 12:49:02

○MXmta1.surfsara.nl2015-07-26 → 2018-08-08 · 4 obs

● 2015-07-26 07:01:26
● 2018-08-08 22:51:18
○ 2026-08-05 12:49:00
○ 2026-08-05 12:49:02

○MXmta2.surfsara.nl2015-07-26 → 2018-08-08 · 4 obs

● 2015-07-26 07:01:26
● 2018-08-08 22:51:18
○ 2026-08-05 12:49:00
○ 2026-08-05 12:49:02

○A145.100.12.2342015-07-26 → 2018-08-08 · 4 obs

● 2015-07-26 07:01:26
● 2018-08-08 22:51:18
○ 2026-08-05 12:49:00
○ 2026-08-05 12:49:02

●A145.100.20.52026-08-05 → 2026-08-05 · 3 obs

○ 2018-08-08 22:51:18
● 2026-08-05 12:49:00
● 2026-08-05 12:49:02

○A2001:610:108:2043::2342015-07-26 → 2018-08-08 · 4 obs

● 2015-07-26 07:01:26
● 2018-08-08 22:51:18
○ 2026-08-05 12:49:00
○ 2026-08-05 12:49:02

●A2001:610:108:204d:145:100:20:52026-08-05 → 2026-08-05 · 3 obs

○ 2018-08-08 22:51:18
● 2026-08-05 12:49:00
● 2026-08-05 12:49:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org	-
surfsara.org	nsauth2.surfsara.nl, ns1.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net...	-

✅ Authoritative Response

Server:195.176.255.9

NS records: nsauth2.surfsara.nl, ns1.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, nsauth1.surfsara.nl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for surfsara.org (unsigned zone)

⏱️ Timing

Total: 725ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`145.100.20.5`
AAAA	1	`2001:610:108:204d:145:100:20:5`
NS	6	`ns1.surfnet.nl, ns3.surfnet.nl...`
MX	1	`. (pri: 10)`
TXT	1	`HARICA-RBMTT4cg0dLq6y1B8IE`
SOA	1	`nsauth1.surfsara.nl dns-admin.surfsara.n`

Analysis

IP Addresses

surfsara.org has two IP addresses: 145.100.20.5 and 2001:610:108:204d:145:100:20:5

sara.nl, surfsara.net, surfsara.nl plus two other host names have IP numbers in common with surfsara.org.

Name Servers

surfsara.org is delegated to 6 name servers: ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl and 3 other.

The name servers of surfsara.org overlap at least partially with those of other domains — among them fwb.eur.nl, 148.169.195.in-addr.arpa, 141.101.145.in-addr.arpa and two more.

These name servers commonly appear in delegations together with ns1.zurich.surf.net, nsauth1.surfsara.nl, nsauth2.surfsara.nl and 7 other.

Host names pointing to two IP addresses:

ns1.surfnet.nl points to 192.87.106.101 and 2001:610:1:800a:192:87:106:101.

ns2.surfnet.nl points to 192.87.36.2 and 2001:610:3:200a:192:87:36:2.

ns3.surfnet.nl points to 195.169.124.71 and 2001:610:0:800c:195:169:124:71.

nsauth1.surfsara.nl points to 145.100.12.242 and 2001:610:108:2043::242.

nsauth2.surfsara.nl points to 145.100.12.243 and 2001:610:108:2043::243.

ns1.zurich.surf.net points to 195.176.255.9 and 2001:620:0:9::1103.