`darboux.mathunion.org`

DNSSEC	⚠️ Not signed
MX	`a1926.mx.srv.dfn.de` ⭐
		A	194.95.232.173^{🇩🇪 DFN194.94.0.0/15 -AGG-16}
			PTR	`a1926.mx.srv.dfn.de`
MX	`b1926.mx.srv.dfn.de` ⭐
		A	194.95.234.173^{🇩🇪 DFN194.94.0.0/15 -AGG-16}
			PTR	`b1926.mx.srv.dfn.de`
MX	`c1926.mx.srv.dfn.de` ⭐
		A	194.95.238.173^{🇩🇪 DFN194.94.0.0/15 -AGG-16}
			PTR	`c1926.mx.srv.dfn.de`

`mathunion.org`

	DNSSEC	⚠️ Not signed
	A	62.141.176.102^{🇩🇪 FVB62.141.160.0/19 -NetOne}
	NS	`lagrange.wias-berlin.de` ⭐
	NS	`deneb.dfn.de`
	NS	`dns-2.dfn.de`
	NS	`laplace.wias-berlin.de`
	MX	`a1926.mx.srv.dfn.de` ⭐
	MX	`b1926.mx.srv.dfn.de` ⭐
	MX	`c1926.mx.srv.dfn.de` ⭐
	TXT	`HARICA-YBzh232DOrQ10zW7TZf`
	TXT	`v=spf1 +mx +ip4:62.141.176.103 +ip4:62.141.177.90 +a:smtp.mathunion.org +a:sm...`
	TXT	`google-site-verification=EyaBCWW-5LN0E7p_Ujm8XrGdde9vHjanJB_wuOm4TGg`
	TXT	`brevo-code:a35134409bb3bee12670610491689f96`
	SOA	`lagrange.wias-berlin.de`hostmaster@wias-berlin.de 2026-02-18 #1

WOT: SAFE (67/100)
rank #32784 globally
rank #3686 in the tld
WOT: SAFE (91/100)
📈 Tranco rank: #128,212

PTR for

107.176.141.62.in-addr.arpa

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DNS History

3 records (3 active, 0 former)

●MXa1926.mx.srv.dfn.de2026-05-12 → 2026-05-13 · 2 obs

● 2026-05-12 12:11:08
● 2026-05-13 06:46:24

●MXb1926.mx.srv.dfn.de2026-05-12 → 2026-05-13 · 2 obs

● 2026-05-12 12:11:08
● 2026-05-13 06:46:24

●MXc1926.mx.srv.dfn.de2026-05-12 → 2026-05-13 · 2 obs

● 2026-05-12 12:11:08
● 2026-05-13 06:46:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b2.org.afilias-nst.org, b0.org.afilias-nst.org	-
mathunion.org	deneb.dfn.de, dns-2.dfn.de, laplace.wias-berlin.de, lagrange.wias-berlin.de	-

✅ Authoritative Response

Server:192.76.176.9

NS records: deneb.dfn.de, dns-2.dfn.de, laplace.wias-berlin.de, lagrange.wias-berlin.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathunion.org (unsigned zone)

⏱️ Timing

Total: 4790ms | Queries: -

📄 Records

Type	Count	Sample Data
MX	3	`a1926.mx.srv.dfn.de (pri: 20), c1926.mx.srv.dfn.de (pri: 20)...`

Analysis

Mail Servers

darboux.mathunion.org is handled by three mail servers: a1926.mx.srv.dfn.de, b1926.mx.srv.dfn.de and c1926.mx.srv.dfn.de.

darboux.mathunion.org shares some mail servers with other domains, at least partially, for instance mardi4nfdi.de, arzela.wias-berlin.de, georg.wias-berlin.de, wias-berlin.de and cisco7200.wias-berlin.de.

Host names with one IP number: a1926.mx.srv.dfn.de points to 194.95.232.173; b1926.mx.srv.dfn.de points to 194.95.234.173; c1926.mx.srv.dfn.de points to 194.95.238.173.

darboux.mathunion.org - robtex.com