`biosemantics.org`

DNSSEC	🔒 Signed (DS record present)
A	156.83.20.12^{🇳🇱 SURFNET-NL156.83.0.0/16 AZR}
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`
MX	`biosemantics.org` ⭐ 🔒
		A	156.83.20.12^{🇳🇱 SURFNET-NL156.83.0.0/16 AZR}
TXT	`v=DKIM1;k=rsa; p=0`
TXT	`v=spf1 -all`
SOA	`ns1.surfnet.nl`dnsadmin@lumc.nl 2026-05-04 #46

`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=1786061001

rank #284923 globally
rank #22617 in the tld
WOT: SAFE (76/100)
📈 Tranco rank: #673,771

MX for

biosemantics.org

Subdomains

www.biosemantics.org

Same first word

biosemantics.org

biosemantics.ai

DNS History

11 records (5 active, 6 former)

○NSns1.lumc.nl2015-07-23 → 2017-08-12 · 5 obs

○ 2008-12-16 14:47:14
● 2015-07-23 12:48:02
● 2017-08-12 00:46:10
○ 2026-02-18 10:55:16
○ 2026-08-07 00:31:36

○NSns1.solidcode.net2008-12-16 → 2008-12-16 · 3 obs

● 2008-12-16 14:47:14
○ 2015-07-23 12:48:02
○ 2026-08-07 00:31:36

●NSns1.surfnet.nl2015-07-23 → 2026-08-07 · 3 obs

○ 2008-12-16 14:47:14
● 2015-07-23 12:48:02
● 2026-08-07 00:31:36

●NSns1.zurich.surf.net2026-02-18 → 2026-08-07 · 3 obs

○ 2017-08-12 00:46:10
● 2026-02-18 10:55:16
● 2026-08-07 00:31:36

○NSns2.lumc.nl2015-07-23 → 2017-08-12 · 5 obs

○ 2008-12-16 14:47:14
● 2015-07-23 12:48:02
● 2017-08-12 00:46:10
○ 2026-02-18 10:55:16
○ 2026-08-07 00:31:36

○NSns2.solidcode.net2008-12-16 → 2008-12-16 · 3 obs

● 2008-12-16 14:47:14
○ 2015-07-23 12:48:02
○ 2026-08-07 00:31:36

●NSns2.surfnet.nl2026-02-18 → 2026-08-07 · 3 obs

○ 2017-08-12 00:46:10
● 2026-02-18 10:55:16
● 2026-08-07 00:31:36

●MXbiosemantics.org2026-02-18 → 2026-08-07 · 3 obs

○ 2015-07-23 12:48:02
● 2026-02-18 10:55:16
● 2026-08-07 00:31:36

○MXpop.biosemantics.org2008-12-16 → 2008-12-16 · 3 obs

● 2008-12-16 14:47:14
○ 2015-07-23 12:48:02
○ 2026-08-07 00:31:36

●A156.83.20.122015-07-23 → 2026-08-07 · 3 obs

○ 2008-12-16 14:47:14
● 2015-07-23 12:48:02
● 2026-08-07 00:31:36

○A80.69.94.1692008-12-16 → 2008-12-16 · 3 obs

● 2008-12-16 14:47:14
○ 2015-07-23 12:48:02
○ 2026-08-07 00:31:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
biosemantics.org	ns2.surfnet.nl, ns1.zurich.surf.net, ns1.surfnet.nl	-

✅ Authoritative Response

Server:192.87.36.2

NS records: ns2.surfnet.nl, ns1.zurich.surf.net, ns1.surfnet.nl

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 585ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`156.83.20.12`
NS	3	`ns1.surfnet.nl, ns1.zurich.surf.net...`
MX	1	`biosemantics.org (pri: 0)`
TXT	2	`v=spf1 -all, v=DKIM1;k=rsa; p=0`
SOA	1	`ns1.surfnet.nl dnsadmin.lumc.nl`

Analysis

Hierarchy

The domain www.biosemantics.org falls under the parent biosemantics.org.

Mail Server Role

biosemantics.org handles its own mail, functioning as its own mail server.

IP Addresses

biosemantics.org resolves to just one IP address, 156.83.20.12.

Name Servers

biosemantics.org is served by three name servers: ns1.surfnet.nl, ns2.surfnet.nl and ns1.zurich.surf.net.

At least some of biosemantics.org's name servers are shared with other domains, for example 37.87.192.in-addr.arpa, werkenbijvumc.nl, student.rocva.nl and two more.

These name servers tend to co-occur with ns3.surfnet.nl, arachne.leidenuniv.nl, ns2.maastrichtuniversity.eu and 7 other name servers in the same DNS delegations.

The hostnames ns1.surfnet.nl, ns2.surfnet.nl and ns1.zurich.surf.net each direct to two IP addresses — ns1.surfnet.nl to 192.87.106.101 and 2001:610:1:800a:192:87:106:101, ns2.surfnet.nl to 192.87.36.2 and 2001:610:3:200a:192:87:36:2, and ns1.zurich.surf.net to 195.176.255.9 and 2001:620:0:9::1103.

Mail Servers

biosemantics.org is served by just one mail server: biosemantics.org.

biosemantics.org resolves to 156.83.20.12 and no other IP number.

biosemantics.org - robtex.com