`sfbu.edu`

DNSSEC	⚠️ Not signed
A	2620:12a:8000::2^{🇺🇸 Fastly2620:12a:8000::/44 Pantheon}
A	2620:12a:8001::2^{🇺🇸 Fastly2620:12a:8000::/44 Pantheon}
A	23.185.0.2^{🇺🇸 Fastly23.185.0.0/24 Pantheon}
NS	`ns1.linode.com` ⭐
		A	2600:14c0:6::2^{🇺🇸 Akamai2600:14c0:6::/48 Technologies}
			PTR	`c1-2.akashield.net`
		A	92.123.94.2^{🇳🇱 Akamai92.123.94.0/24 Technologies}
			PTR	`c1-2.akashield.net`
NS	`ns2.linode.com`
		A	2600:14c0:6::3^{🇺🇸 Akamai2600:14c0:6::/48 Technologies}
			PTR	`c1-3.akashield.net`
		A	92.123.94.3^{🇳🇱 Akamai92.123.94.0/24 Technologies}
			PTR	`c1-3.akashield.net`
NS	`ns3.linode.com`
		A	2600:14c0:7::3^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-3.akashield.net`
		A	92.123.95.3^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-3.akashield.net`
NS	`ns4.linode.com`
		A	2600:14c0:7::4^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-4.akashield.net`
		A	92.123.95.4^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-4.akashield.net`
NS	`ns5.linode.com`
		A	2600:14c0:7::2^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-2.akashield.net`
		A	92.123.95.2^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-2.akashield.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c19::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bk-in-f27.1e100.net`
		A	172.253.62.27^{🇺🇸 Google172.253.62.0/24}
			PTR	`bc-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4003:c30::1b^{🇺🇸 Google2607:f8b0:4003::/48}
			PTR	`yutulis-in-f27.1e100.net`
		A	74.125.27.26^{🇺🇸 Google74.125.27.0/24}
			PTR	`yutulis-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4001:c70::1a^{🇺🇸 Google2607:f8b0:4001::/48}
			PTR	`yucbful-in-f26.1e100.net`
		A	192.178.209.26^{🇺🇸 Google192.178.209.0/24}
			PTR	`yucbful-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2607:f8b0:4024:c0d::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`mj-in-f27.1e100.net`
		A	192.178.152.26^{🇺🇸 Google192.178.152.0/24}
			PTR	`mj-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2607:f8b0:4023:403::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`gg-in-f26.1e100.net`
		A	142.250.96.27^{🇺🇸 Google142.250.96.0/24}
			PTR	`gg-in-f27.1e100.net`
TXT	`openai-domain-verification=dv-EusclYZUiqhdB4aCH4Jmnj92`
TXT	`MS=ms19806233`
TXT	`MS=ms50003384`
TXT	`v=spf1 include:_spf.google.com include:_spf.salesforce.com include:_spf.elast...`
TXT	`neg0kjnmvu1ieqlh956knh7p35`
TXT	`google-site-verification=tG3h0q5aYopJunlmxhQQ0pJbmDqQZ3AO36pRiWZN7gs`
TXT	`openai-domain-verification=dv-lMqcBBHGsQyXzN5TdcjpRofq`
TXT	`google-site-verification=NZWE4jz-IfUqD7UChQPOMufCKVAP13JgmNjo0in10iw`
SOA	`ns1.linode.com`sysadmin@sfbu.edu serial=2021000153

`edu`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.edu-servers.net` ⭐
	NS	`b.edu-servers.net`
	NS	`c.edu-servers.net`
	NS	`d.edu-servers.net`
	NS	`e.edu-servers.net`
	NS	`f.edu-servers.net`
	NS	`g.edu-servers.net`
	NS	`h.edu-servers.net`
	NS	`i.edu-servers.net`
	NS	`j.edu-servers.net`
	NS	`k.edu-servers.net`
	NS	`l.edu-servers.net`
	NS	`m.edu-servers.net`
	SOA	`a.edu-servers.net`nstld@verisign-grs.com serial=1772435516

Same first word

sfbu.de

sfbu.no

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bufs.ac.kr

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fbus.de

usfb.in

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busf.de

DNS History

13 records (13 active, 0 former)

●NSns1.linode.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●NSns2.linode.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●NSns3.linode.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●NSns4.linode.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●NSns5.linode.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●MXalt1.aspmx.l.google.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●MXalt2.aspmx.l.google.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●MXalt3.aspmx.l.google.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●MXalt4.aspmx.l.google.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●MXaspmx.l.google.com2026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●A23.185.0.22026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●A2620:12a:8000::22026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

●A2620:12a:8001::22026-03-22 → 2026-03-22 · 2 obs

● 2026-03-22 01:12:30
● 2026-03-22 01:12:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	a.edu-servers.net, b.edu-servers.net, c.edu-servers.net, d.edu-servers.net...	-
sfbu.edu	ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com...	-

✅ Authoritative Response

Server: 92.123.95.4

NS records: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com, ns5.linode.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sfbu.edu (unsigned zone)

⏱️ Timing

Total: 793ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.185.0.2`
AAAA	2	`2620:12a:8001::2, 2620:12a:8000::2`
NS	5	`ns5.linode.com, ns4.linode.com...`
MX	5	`ALT1.ASPMX.L.GOOGLE.COM (pri: 5), ALT4.ASPMX.L.GOOGLE.COM (pri: 10)...`
TXT	8	`MS=ms19806233, openai-domain-verification=dv-EusclYZUiq...`
SOA	1	`ns1.linode.com sysadmin.sfbu.edu`

Analysis

IP Addresses

sfbu.edu points to three IP numbers: 2620:12a:8000::2, 2620:12a:8001::2 and 23.185.0.2.

Other host names including ihsaa.org, nestlefamilynes.com.mx, www.glenncourt.ca.gov, youthtruthsurvey.org and edpnc.com share IP numbers with sfbu.edu.

Name Servers

sfbu.edu is delegated to five name servers: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com and ns5.linode.com.

sfbu.edu at least partially shares name servers with other domains, including mikomi.org, exlade.com, cj88.dk, overand.com and centerstagewellness.com.