`mail.bitnotes.org`

DNSSEC	⚠️ Not signed
A	81.91.87.10^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`mail.web4u.cz`

`bitnotes.org`

	DNSSEC	⚠️ Not signed
	A	2a02:2b88:2:1::6773:1^{🇨🇿 WEDOS2a02:2b88::/32 Internet, a.s.}
	A	46.28.110.163^{🇨🇿 WEDOS46.28.104.0/21 Internet, a.s.}
	NS	`ns2.web4u.cz` ⭐
	NS	`ns.web4u.cz`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
	TXT	`google-site-verification=MOEslDH1x85iusYrXZO6dW2sk0mqc4LcJtO4PMkdx5o`
	SOA	`ns.web4u.cz`admin@web4u.cz 2015-09-14 #1

Previously MX for

bitnotes.org

Same first word

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mail.how

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mail.ai

lami.ro

almi.com

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alim.ee

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mail.gen.tr

mail.zip

DNS History

1 record (1 active, 0 former)

●A81.91.87.102026-05-10 → 2026-05-10 · 2 obs

● 2026-05-10 07:00:08
● 2026-05-10 12:31:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
bitnotes.org	ns2.web4u.cz, ns.web4u.cz	-

✅ Authoritative Response

Server:185.14.224.241

NS records: ns2.web4u.cz, ns.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bitnotes.org (unsigned zone)

⏱️ Timing

Total: 983ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.87.10`

Analysis

IP Addresses

mail.bitnotes.org points to a single IP address: 81.91.87.10.

Other host names such as mail.egalita.cz, mail.biblezlatokopky.com, mail.led-profi.cz, mail.actia.cz and mail.restauraceufismistru.cz share IPs with mail.bitnotes.org.

mail.bitnotes.org - robtex.com