`b.isi.edu`

DNSSEC	⚠️ Not signed
NS	`ns-w.b.isi.edu` ⭐
		A	2001:1878:401::8009:1cfb^{🇺🇸 ISI2001:1878:401::/48}
			PTR	`ns-w.ant.isi.edu`
		A	128.9.28.251^{🇺🇸 ISI128.9.28.0/23}
			PTR	`ns-w.ant.isi.edu`
NS	`ns-e.b.isi.edu`
		A	2001:470:7:b8:1:0:8009:3f88^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
		A	128.9.63.136^{🇺🇸 ISI128.9.48.0/20 Proxy-registered route object for ISI}
			PTR	`ns-e.ant.isi.edu`
			PTR	`ns-e.b.isi.edu`
NS	`ns-lax.b.root-servers.org` ⚠️ Not in parent delegation
		A	2001:500:204::1:0:92^{🇺🇸 B-ROOT-SERVER-OPS2001:500:204::/48 B-Root Operations}
			PTR	`b.root-servers.org`
		A	206.117.5.92^{🇺🇸 Los-Nettos206.117.0.0/16 ln-net3}
			PTR	`b.root-servers.org`
SOA	`ns-w.b.isi.edu`b-poc@isi.edu serial=1775745652

`isi.edu`

	DNSSEC	⚠️ Not signed
	A	141.193.213.20^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
	A	141.193.213.21^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
	NS	`mdrinfoblox-gm01.ads.isi.edu` ⭐
	NS	`ns2.isi.edu`
	NS	`ns3.isi.edu`
	NS	`ns4.isi.edu`
	MX	`mxa-006c3502.gslb.gpphosted.com` ⭐
	MX	`mxb-006c3502.gslb.gpphosted.com` ⭐
	TXT	`OSSRH-90447`
	TXT	`_3ji0kq2cjlddas4tqi3mbon3xjhhxps`
	TXT	`apple-domain-verification=5FZgJkmHEGYFXkSg`
	TXT	`docusign=55f9b41e-27b7-49e4-af9e-c11b83854c61`
	TXT	`tgHn89inYU4zTEMfv0T+jS8XykcPIsqF6+lvfjStaf639eXGhSSOSdNlSW/qss6Up3dPCv+X6+8gZ...`
	TXT	`infoblox-domain-mastery=9c12fcf7c63542b120c0636e2605be7f76b23c4fb830989083452...`
	TXT	`atlassian-domain-verification=aNYeVhAS9Ogdeh/aU4x04/fQ9ElE8q0NlhcTa2xB/Ze6113...`
	TXT	`v=spf1 a mx a:ant.isi.edu a:hmail.jitbit.com a:hmail2.jitbit.com ip4:209.85.1...`
	SOA	`mdrinfoblox-gm01.ads.isi.edu`hostmaster@dev.null serial=2022803970

WOT: SAFE (93/100)
rank #8381 globally
rank #271 in the tld
WOT: SAFE (93/100)
📈 Tranco rank: #17,161

Subdomains

ns-e.b.isi.edu

ns-w.b.isi.edu

ns-lax.b.isi.edu

Same first word

b.pl

b.kg

b.capital

b.fashion

b.sg

b.af

b.cc

b.camp

b.org.nz

b.githubusercontent.com

b.fyi

b.bi

b.bw

b.sh

b.vg

b.at

b.is

b.care

b.site

b.ph

b.lu

b.gd

b.ink

b.gold

b.art.pl

b.uy

b.sc

b.co

b.systems

b.s3.amazonaws.com

b.beer

b.sk

b.glass

b.cr

b.lol

b.akamai.net

b.cash

b.fi

b.net.nz

b.hr

b.fm

b.company

b.qh.cn

b.app

b.vodka

b.doctor

b.me

b.aivencloud.com

b.br

b.nx.cn

b.dk

b.gl

b.et

b.hm

b.info.pl

b.nu

b.link

b.co.nl

b.mr

b.ht

b.cm

b.biz

b.asia

b.green

b.co.uk

b.ai

b.akamai-staging.net

b.gov.au

b.fit

b.tc

b.gg

b.com.br

b.tv

b.hu

b.ddns.net

b.bike

b.game

b.to

b.ly

b.com.ua

b.eus

b.cl

b.fr

b.ath.cx

b.mw

b.co.za

b.io

b.ws

b.js.cn

b.je

b.country

b.ro

b.akamaiedge-staging.net

b.top

b.ms

b.ln.cn

b.ua

b.gov.lv

b.co.kr

b.media

b.ee

b.ie

b.com.mx

b.com.de

b.gt

b.gp

b.digital

b.org

b.box

b.new

b.ls

b.st

b.cn

b.co.zw

b.watch

b.kz

b.cz

b.wtf

Similar names

b.akamaiedge.net

b.my

b.gy

b.edu.vn

DNS History

3 records (3 active, 0 former)

●NSns-e.b.isi.edu2026-03-24 → 2026-04-14 · 2 obs

● 2026-03-24 15:22:28
● 2026-04-14 11:52:10

●NSns-lax.b.root-servers.org2026-03-24 → 2026-04-14 · 2 obs

● 2026-03-24 15:22:28
● 2026-04-14 11:52:10

●NSns-w.b.isi.edu2026-03-24 → 2026-04-14 · 2 obs

● 2026-03-24 15:22:28
● 2026-04-14 11:52:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	d.edu-servers.net, b.edu-servers.net, f.edu-servers.net, h.edu-servers.net...	-
isi.edu	ns2.isi.edu, ns4.isi.edu, ns3.isi.edu	3 records
b.isi.edu	ns-e.b.isi.edu, ns-w.b.isi.edu, ns-lax.b.root-servers.org	4 records

✅ Authoritative Response

Server:128.9.63.136

NS records: ns-e.b.isi.edu, ns-w.b.isi.edu, ns-lax.b.root-servers.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for b.isi.edu (unsigned zone)

⏱️ Timing

Total: 293ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns-e.b.isi.edu, ns-lax.b.root-servers.org...`
SOA	1	`ns-w.b.isi.edu b-poc.isi.edu`

📌 Glue Records Collected

Total: 7

In-bailiwick: 7 (ns2.isi.edu, ns4.isi.edu, ns3.isi.edu...)

Analysis

Hierarchy

b.isi.edu is a parent of ns-e.b.isi.edu, ns-w.b.isi.edu and ns-lax.b.isi.edu.

Name Servers

b.isi.edu is delegated to three name servers: ns-e.b.isi.edu, ns-w.b.isi.edu and ns-lax.b.root-servers.org.

b.isi.edu at least partially shares name servers with other domains, including 5.117.206.in-addr.arpa, ant.isi.edu, 29.9.128.in-addr.arpa, postel.org and 1.0.0.8.b.1.0.1.0.8.2.ip6.arpa.

These name servers are commonly used with vir.isi.edu, vm19e.ant.isi.edu, vm06.ant.isi.edu, dns.postel.org, heidemann.ant.isi.edu, ns-e.ant.isi.edu, ns-lax.ant.isi.edu and ns-w.ant.isi.edu.

Host names with two IP numbers:

ns-e.b.isi.edu points to: 2001:470:7:b8:1:0:8009:3f88 and 128.9.63.136

ns-w.b.isi.edu points to: 2001:1878:401::8009:1cfb and 128.9.28.251

ns-lax.b.root-servers.org points to: 2001:500:204::1:0:92 and 206.117.5.92

b.isi.edu - robtex.com

b.isi.edu

isi.edu

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

Name Servers

`b.isi.edu`

`isi.edu`